2 Working with Polyhedra.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Working with Polyhedra\n",
    "\n",
    "## $\\mathcal{V}$-polyhedra representation\n",
    "\n",
    "Internally, `polymake` represents polyhedra through their homogenization cones. We know that if $ P = \\ mathrm {conv} (V) + \\ mathrm {cone} (Y) \\ subset \\ mathbb {R} ^ d $, then the homogenization cone of $ P $ is given by:\n",
    "\n",
    "$$\n",
    "\\mathrm{homog}(P):= \\mathrm{cone}\\left(\n",
    "\\begin{array}{cc}\n",
    "\\mathbf{1}^T & \\mathbf{0}^T\\\\\n",
    "V & Y\n",
    "\\end{array}\n",
    "\\right) \\subset \\mathbb{R}^{d+1}.\n",
    "$$\n",
    "\n",
    "The vectors (or points) in $ \\ mathbb {R} ^ {d + 1} $ to generate $ \\ mathrm {homog} (P) $ are specified by means of the `POINTS` property.\n",
    "\n",
    "You can never send the V column empty."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Por ejemplo, definimos a continuación `$p` como la envolvente convexa del conjunto $\\{ (-1,-1), (-1,1), (1,-1), (1,1), (0,0) \\}$:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "name: p\n",
       "type: Polytope<Rational>\n",
       "\n",
       "CONE_AMBIENT_DIM\n",
       "3\n",
       "\n",
       "POINTS\n",
       "1 -1 -1\n",
       "1 -1 1\n",
       "1 1 -1\n",
       "1 1 1\n",
       "1 0 0\n",
       "\n"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "$p=new Polytope(POINTS=>[[1,-1,-1],[1,-1,1],[1,1,-1],[1,1,1],[1,0,0]]);\n",
    "### mostrar las propiedades de $p\n",
    "$p->properties;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can get a graphical representation of `$ p` by calling the` VISUAL` method."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:32:06 2021\n",
       "p\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>p</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
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       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
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       "         img{cursor: pointer;}\n",
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       "         .threejs_container { width: 100%; height: 75vh;}\n",
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       "           -webkit-appearance: none;\n",
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       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
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       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
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       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
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       "         input[type=range]:focus::-ms-fill-lower {\n",
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       "         input[type=range]:focus::-ms-fill-upper {\n",
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       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_1' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_1' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_1' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_1'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_1'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_1'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_1'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_1'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_1' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
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       "\t\t\t\t<strong>Display</strong>\n",
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       "\t\t\t\t\t<div id='shownObjectTypesList_1' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_1' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_1'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_1\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_1'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_1' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_1' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_1'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_1' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_1' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model98868770202\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model98868770202\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model98868770202');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"p\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(-1, -1, 0));\n",
       "obj0.userData.points.push(new PMPoint(-1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, -1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 1, 0));\n",
       "\n",
       "obj0.userData.pointradii = 0.02;\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"1\", \"2\", \"3\"];\n",
       "obj0.userData.edgeindices = [0, 1, 0, 2, 1, 3, 2, 3];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[0, 2, 3, 1]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_1');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_1').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_1').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_1').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_1').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_1').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_1').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_1');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_1';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_1').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_1').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_1').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_1').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_1').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_1');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_1');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_1').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_1').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_1').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_1').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_1').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_1').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_1').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_1').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_1').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_1').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_1').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_1').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "### Show a graphical representation of $p\n",
    "$p->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "By consulting the `VERTICES` property we can determine which are the non-redundant points required to define the polytope (that is, its vertices):"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 -1 -1\n",
       "1 -1 1\n",
       "1 1 -1\n",
       "1 1 1\n"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print $p->VERTICES;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The `DIM` property returns the dimension of the polytope:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print $p->DIM;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The `FACETS` property returns the inequalities that define the facets of the polytope. When queried, `polymake` internally invokes a Fourier-Motzkin algorithm to transform the representation $ \\mathcal{V} $ into the representation $ \\mathcal{H} $ of the polytope, from the calculation of the convex envelope. With the `prefer` statement we can specifically require that one of the available methods be used. For example, the following code snippet uses the [revised reverse search algorithm `lrs`] (http://cgm.cs.mcgill.ca/~avis/C/lrs.html) developed by David Avis:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: x1 >= -1\n",
       "1: x2 >= -1\n",
       "2: -x1 >= -1\n",
       "3: -x2 >= -1\n",
       "\n"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "prefer \"lrs\";\n",
    "print_constraints($p->FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "With the `VERTICES_IN_FACETS` property we query the incidence between vertices and facets:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{0 1}\n",
       "{0 2}\n",
       "{2 3}\n",
       "{1 3}\n"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print ($p->VERTICES_IN_FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We will now add a conic part to the previous polyhedron. According to the representation of the homogenization cone, this is achieved by adding a point (or vector) with the first coordinate equal to zero when specifying the `POINTS` property.\n",
    "\n",
    "In the following example we define `$q` as $ \\mathrm{conv} (\\{(- 1, -1), (-1,1), (1, -1), (1,1), (0 , 0) \\}) + \\mathrm{cone} (\\{(1,1)\\}) $"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:34:56 2021\n",
       "q_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>q_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model53760300096 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_2' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_2' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_2' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_2'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_2'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_2'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_2'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_2'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_2' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_2'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_2' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_2' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_2'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_2\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_2'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_2' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_2' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_2'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_2' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_2' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model53760300096\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model53760300096\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model53760300096');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"q_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(-1, -1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, -1, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.4, 1.4, 0));\n",
       "obj0.userData.points.push(new PMPoint(-1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1.4, 3.4, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.4, 3.4, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0.02, 0.02, 0, 0.02, 0, 0];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"2\", \" \", \"1\", \" \", \" \"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 0, 3, 3, 4, 2, 5, 4, 5];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[1, 2, 5, 4, 3, 0]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_2');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_2').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_2').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_2').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_2').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_2').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_2').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_2');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_2';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_2').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_2').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_2').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_2').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_2').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_2');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_2');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_2').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_2').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_2').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_2').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_2').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_2').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_2').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_2').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_2').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_2').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_2').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_2').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "<details><summary><pre style=\"display:inline\"><small>Click here for additional output</small></pre></summary>\n",
       "<pre>\n",
       "polymake: used package lrs\n",
       "  Implementation of the reverse search algorithm of Avis and Fukuda.\n",
       "  Copyright by David Avis.\n",
       "  http://cgm.cs.mcgill.ca/~avis/C/lrs.html\n",
       "\n",
       "</pre>\n",
       "</details>\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$q = new Polytope(POINTS=>[[1,-1,-1],[1,-1,1],[1,1,-1],[1,1,1],[1,0,0],[0,1,1]]);\n",
    "$q -> VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "When consulting the `VERTICES` property we can see that the new polyhedron has three vertices (non-redundant points in the convex combination) and a ray (non-redundant vector in the conic combination). The vertices have the first coordinate equal to 1, the rays have the first coordinate equal to 0:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 -1 -1\n",
       "1 -1 1\n",
       "1 1 -1\n",
       "0 1 1\n"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print($q->VERTICES);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can also consult the inequalities that define the facets of `$q`, as well as the incidence of facets in vertices:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: x2 >= -1\n",
       "1: x1 >= -1\n",
       "2: -1/2 x1 + 1/2 x2 >= -1\n",
       "3: 1/2 x1 - 1/2 x2 >= -1\n",
       "\n",
       "---\n",
       "{0 2}\n",
       "{0 1}\n",
       "{2 3}\n",
       "{1 3}\n"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "### Show facets of $q\n",
    "print_constraints($q->FACETS);\n",
    "print(\"---\\n\");\n",
    "\n",
    "### Show vertices incidence on facets\n",
    "print ($q->VERTICES_IN_FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## $\\mathcal{H}$-poliedros representation\n",
    "\n",
    "A $ \\mathcal{H} $ - polyhedron of the form $ P: = \\{x \\in \\mathbb{R}^d \\,: \\, Ax \\leq b \\} $ is represented by its homogenization cone , given by the system of inequalities:\n",
    "\n",
    "$$\n",
    "\\left(\n",
    "\\begin{array}{cc}\n",
    "1 & \\mathbf{0}^T \\\\\n",
    "b & -A\n",
    "\\end{array}\n",
    "\\right)\n",
    "\\left(\n",
    "\\begin{array}{c}\n",
    "x_0 \\\\ x\n",
    "\\end{array}\n",
    "\\right)\n",
    "\\geq \\mathbf{0}.\n",
    "$$\n",
    "\n",
    "The rows of the coefficient matrix are specified by means of the `INEQUALITIES` property; it is not necessary to include the first row, which is automatically added by polymake.\n",
    "\n",
    "For example, the following code snippet assigns to the variable `$r` the polyhedron at $ \\mathbb {R}^2 $ defined by the system of inequalities:\n",
    "\n",
    "$$\n",
    "\\left\\{\n",
    "\\begin{aligned}\n",
    "& x_1 + x_2 \\leq 4 \\\\\n",
    "& x_1 + 2x_2 \\leq 7 \\\\\n",
    "& 0 \\leq x_1 \\leq 2 \\\\\n",
    "& 0 \\leq x_2 \\leq 3 \\\\\n",
    "\\end{aligned}\n",
    "\\right.\n",
    "$$"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "name: r\n",
       "type: Polytope<Rational>\n",
       "\n",
       "CONE_AMBIENT_DIM\n",
       "3\n",
       "\n",
       "INEQUALITIES\n",
       "4 -1 -1\n",
       "7 -1 -2\n",
       "2 -1 0\n",
       "3 0 -1\n",
       "0 1 0\n",
       "0 0 1\n",
       "1 0 0\n",
       "\n"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "$r = new Polytope(INEQUALITIES=>[[4,-1,-1],[7,-1,-2],[2,-1,0],[3,0,-1],[0,1,0], [0,0,1]]);\n",
    "### Show the properties of $r\n",
    "$r->properties;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Note that polymake automatically added the row `[1, 0, 0]`, corresponding to the inequality $ x_0 \\geq 0 $.\n",
    "\n",
    "The `print_constraints` function writes the system of inequalities in a more user-friendly format. Note that this function also undoes the homogenization. In particular, the nonegativity of $ x_0 $ becomes the trivial inequality $ 0 \\geq -1 $."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: -x1 - x2 >= -4\n",
       "1: -x1 - 2 x2 >= -7\n",
       "2: -x1 >= -2\n",
       "3: -x2 >= -3\n",
       "4: x1 >= 0\n",
       "5: x2 >= 0\n",
       "6: 0 >= -1\n",
       "\n"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print_constraints($r->INEQUALITIES);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Consulting the `FACETS` property we obtain the non-redundant inequalities of the system. In the previous example, the second inequality is not listed, because it is obtained as the sum of the first and fourth inequalities. Similarly, the trivial inequality $ 0 \\geq -1 $ is removed from the system."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: -x1 - x2 >= -4\n",
       "1: -x1 >= -2\n",
       "2: -x2 >= -3\n",
       "3: x1 >= 0\n",
       "4: x2 >= 0\n",
       "\n"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print_constraints($r->FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "With the `VISUAL` method we get a graphical representation of `$r`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:39:54 2021\n",
       "r\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>r</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model88423514146 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_3' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_3' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_3' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_3'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_3'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_3'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_3'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_3'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_3' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_3'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_3' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_3' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_3'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_3\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_3'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_3' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_3' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_3'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_3' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_3' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model88423514146\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model88423514146\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model88423514146');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"r\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(0, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(2, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(2, 2, 0));\n",
       "obj0.userData.points.push(new PMPoint(0, 3, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 3, 0));\n",
       "\n",
       "obj0.userData.pointradii = 0.02;\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"1\", \"2\", \"3\", \"4\"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 0, 3, 2, 4, 3, 4];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[4, 3, 0, 1, 2]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_3');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_3').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_3').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_3').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_3').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_3').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_3').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_3');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_3';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_3').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_3').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_3').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_3').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_3').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_3');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_3');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_3').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_3').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_3').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_3').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_3').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_3').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_3').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_3').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_3').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_3').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_3').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_3').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$r->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The `VERTICES` property indicates the vertices and rays necessary to express the polytope in the form $ \\mathcal{V} $. When querying this property, `polymake` automatically invokes a Fourier-Motzkin algorithm to change the representation of the polyhedron by enumerating its vertices.\n",
    "\n",
    "Remember that the vertices have the first coordinate equal to 1, while the rays have the first coordinate equal to 0."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 0 0\n",
       "1 2 0\n",
       "1 2 2\n",
       "1 0 3\n",
       "1 1 3\n"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "### Show vertices and rays of $r\n",
    "print($r->VERTICES);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Minkowski sum\n",
    "\n",
    "Let's define the polytope `$p` as the convex envelope of the set of points $ \\{(1,1), (2,1), (1,2) \\} $:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:41:33 2021\n",
       "p\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>p</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model98677540359 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_4' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_4' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_4' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_4'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_4'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_4'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_4'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_4'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_4' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_4'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_4' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_4' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_4'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_4\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_4'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_4' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_4' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_4'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_4' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_4' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model98677540359\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model98677540359\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model98677540359');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"p\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(2, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 2, 0));\n",
       "\n",
       "obj0.userData.pointradii = 0.02;\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"1\", \"2\"];\n",
       "obj0.userData.edgeindices = [0, 1, 0, 2, 1, 2];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[1, 2, 0]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_4');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_4').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_4').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_4').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_4').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_4').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_4').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_4');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_4';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_4').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_4').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_4').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_4').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_4').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_4');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_4');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_4').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_4').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_4').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_4').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_4').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_4').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_4').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_4').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_4').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_4').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_4').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_4').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$p=new Polytope(POINTS=>[[1,1,1],[1,2,1],[1,1,2]]);\n",
    "$p->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Now let's define `$q` as the cone generated by the vectors $ 10 \\choose 9 $ and $ 9 \\choose 10 $. Note that it is necessary to explicitly indicate the vertex of the cone between the elements of the `POINTS` parameter\n",
    "when calling the `Polytope` constructor. This is required to obtain a full-dimensional homogenization cone that can be intersected with the hyperplane $ x_0 = 1 $ to retrieve our original polyhedron."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:42:18 2021\n",
       "q_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>q_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model30513725815 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_5' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_5' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_5' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_5'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_5'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_5'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_5'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_5'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_5' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_5'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_5' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_5' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_5'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_5\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_5'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_5' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_5' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_5'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_5' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_5' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model30513725815\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model30513725815\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model30513725815');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"q_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(0, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.9, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 0.9, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0.02, 0, 0, 0];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \" \", \" \", \" \"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 0, 3, 2, 3];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[0, 3, 2, 1]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_5');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_5').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_5').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_5').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_5').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_5').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_5').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_5');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_5';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_5').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_5').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_5').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_5').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_5').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_5');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_5');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_5').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_5').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_5').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_5').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_5').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_5').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_5').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_5').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_5').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_5').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_5').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_5').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$q=new Polytope(POINTS=>[[1,0,0],[0,10,9],[0,9,10]]);\n",
    "$q->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "To calculate the Minkowski sum between `$p` and `$q` we can use the `minkowski_sum` function, the same one that returns a new polyhedron as a result:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:42:51 2021\n",
       "_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model99509438643 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_6' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_6' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_6' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_6'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_6'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_6'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_6'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_6'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_6' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_6'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_6' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_6' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_6'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_6\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_6'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_6' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_6' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_6'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_6' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_6' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model99509438643\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model99509438643\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model99509438643');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 2, 0));\n",
       "obj0.userData.points.push(new PMPoint(2.08, 3.2, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.2, 3.2, 0));\n",
       "obj0.userData.points.push(new PMPoint(2, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.2, 2.08, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0.02, 0.02, 0, 0, 0.02, 0];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"2\", \" \", \" \", \"1\", \" \"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 2, 3, 0, 4, 3, 5, 4, 5];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[0, 4, 5, 3, 2, 1]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_6');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_6').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_6').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_6').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_6').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_6').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_6').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_6');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_6';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_6').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_6').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_6').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_6').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_6').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_6');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_6');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_6').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_6').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_6').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_6').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_6').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_6').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_6').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_6').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_6').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_6').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_6').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_6').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$m = minkowski_sum($p, $q);\n",
    "$m -> VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can now consult the different properties of the new polyhedron created:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 1 1\n",
       "1 2 1\n",
       "1 1 2\n",
       "0 1 9/10\n",
       "0 1 10/9\n"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print ($m->VERTICES);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: x1 >= 1\n",
       "1: x2 >= 1\n",
       "2: -9/8 x1 + 5/4 x2 >= -1\n",
       "3: 5/4 x1 - 9/8 x2 >= -1\n",
       "4: 0 >= -1\n",
       "\n"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print_constraints($m->FACETS);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{0 2}\n",
       "{0 1}\n",
       "{1 3}\n",
       "{2 4}\n",
       "{3 4}\n"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print($m->VERTICES_IN_FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Recession cones\n",
    "\n",
    "Given a polyhedron, `polymake` can be used to calculate its cone of recession. Consider the last polyhedron `$ m` that we have defined:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:43:44 2021\n",
       "_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model33163357408 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_7' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_7' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_7' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_7'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_7'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_7'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_7'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_7'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_7' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_7'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_7' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_7' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_7'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_7\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_7'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_7' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_7' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_7'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_7' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_7' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model33163357408\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model33163357408\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model33163357408');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(1, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 2, 0));\n",
       "obj0.userData.points.push(new PMPoint(2.08, 3.2, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.2, 3.2, 0));\n",
       "obj0.userData.points.push(new PMPoint(2, 1, 0));\n",
       "obj0.userData.points.push(new PMPoint(3.2, 2.08, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0.02, 0.02, 0, 0, 0.02, 0];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"2\", \" \", \" \", \"1\", \" \"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 2, 3, 0, 4, 3, 5, 4, 5];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[0, 4, 5, 3, 2, 1]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_7');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_7').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_7').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_7').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_7').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_7').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_7').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_7');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_7';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_7').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_7').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_7').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_7').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_7').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_7');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_7');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_7').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_7').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_7').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_7').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_7').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_7').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_7').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_7').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_7').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_7').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_7').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_7').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$m->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "To retrieve the recession cone from `$m` we call the `recession_cone` function:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:44:18 2021\n",
       "fan:\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>fan:</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model27427170641 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_8' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_8' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_8' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_8'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_8'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_8'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_8'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_8'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_8' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_8'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_8' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_8' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_8'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_8\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_8'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_8' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_8' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_8'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_8' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_8' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model27427170641\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model27427170641\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model27427170641');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"unnamed__1\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(0.743294, 0.668965, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.668965, 0.743294, 0));\n",
       "obj0.userData.points.push(new PMPoint(0, 0, 0));\n",
       "\n",
       "obj0.userData.edgeindices = [0, 1, 0, 2, 1, 2];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[2, 0, 1]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_8');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_8').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_8').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_8').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_8').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_8').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_8').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_8');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_8';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_8').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_8').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_8').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_8').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_8').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_8');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_8');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_8').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_8').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_8').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_8').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_8').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_8').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_8').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_8').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_8').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_8').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_8').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_8').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$q2= recession_cone($m);\n",
    "$q2 -> VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Contrary to what happens with polyhedra in general, this cone is represented without homogenization. The `RAYS` property allows consulting the vectors that generate it:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 9/10\n",
       "1 10/9\n",
       "---\n",
       "type: Cone<Rational>\n",
       "\n",
       "CONE_AMBIENT_DIM\n",
       "2\n",
       "\n",
       "CONE_DIM\n",
       "2\n",
       "\n",
       "FACETS\n",
       "1 -9/10\n",
       "-1 10/9\n",
       "\n",
       "\n",
       "FULL_DIM\n",
       "true\n",
       "\n",
       "LINEALITY_DIM\n",
       "0\n",
       "\n",
       "LINEALITY_SPACE\n",
       "\n",
       "\n",
       "LINEAR_SPAN\n",
       "\n",
       "\n",
       "N_FACETS\n",
       "2\n",
       "\n",
       "N_RAYS\n",
       "2\n",
       "\n",
       "POINTED\n",
       "true\n",
       "\n",
       "RAYS\n",
       "1 9/10\n",
       "1 10/9\n",
       "\n",
       "\n",
       "RAYS_IN_FACETS\n",
       "{1}\n",
       "{0}\n",
       "\n",
       "---\n",
       "name: q\n",
       "type: Polytope<Rational>\n",
       "\n",
       "AFFINE_HULL\n",
       "\n",
       "\n",
       "BOUNDED\n",
       "false\n",
       "\n",
       "COMBINATORIAL_DIM\n",
       "2\n",
       "\n",
       "CONE_AMBIENT_DIM\n",
       "3\n",
       "\n",
       "CONE_DIM\n",
       "3\n",
       "\n",
       "FACETS\n",
       "0 1 -9/10\n",
       "0 -1 10/9\n",
       "1 0 0\n",
       "\n",
       "\n",
       "FEASIBLE\n",
       "true\n",
       "\n",
       "FULL_DIM\n",
       "true\n",
       "\n",
       "LINEALITY_DIM\n",
       "0\n",
       "\n",
       "LINEALITY_SPACE\n",
       "\n",
       "\n",
       "N_POINTS\n",
       "3\n",
       "\n",
       "N_VERTICES\n",
       "3\n",
       "\n",
       "POINTED\n",
       "true\n",
       "\n",
       "POINTS\n",
       "1 0 0\n",
       "0 1 9/10\n",
       "0 1 10/9\n",
       "\n",
       "\n",
       "VERTICES\n",
       "1 0 0\n",
       "0 1 9/10\n",
       "0 1 10/9\n",
       "\n"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print($q2->RAYS);\n",
    "print(\"---\\n\");\n",
    "print($q2->properties);\n",
    "print(\"---\\n\");\n",
    "print($q->properties);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise\n",
    "\n",
    "1. Let's define a polytope `$h` as a hexagon embedded in the hyperplane $ x_3 = 0 $ in $ \\mathbb{R}^3 $:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:47:58 2021\n",
       "h\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>h</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model30248023501 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_9' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_9' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_9' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_9'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_9'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_9'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_9'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_9'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_9' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_9'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_9' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_9' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_9'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_9\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_9'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_9' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_9' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_9'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_9' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_9' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model30248023501\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model30248023501\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model30248023501');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"h\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(1, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.5, 0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(-0.5, 0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(-1, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.5, -0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(-0.5, -0.666667, 0));\n",
       "\n",
       "obj0.userData.pointradii = 0.02;\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\"0\", \"1\", \"2\", \"3\", \"4\", \"5\"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 2, 3, 0, 4, 3, 5, 4, 5];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[3, 2, 1, 0, 4, 5]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } );\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_9');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_9').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_9').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_9').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_9').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_9').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_9').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_9');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_9';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_9').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_9').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_9').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_9').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_9').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_9');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_9');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_9').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_9').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_9').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_9').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_9').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_9').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_9').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_9').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_9').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_9').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_9').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_9').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "### $h := conv({(1,0,0), (1/2,2/3,0), (-1/2,2/3,0), (-1,0,0), (1/2,-2/3,0), (-1/2,-2/3,0)})\n",
    "$h=new Polytope(POINTS=>[[1,1,0,0],[1,1/2,2/3,0],[1,-1/2,2/3,0],[1,-1,0,0],\n",
    "[1,1/2,-2/3,0],[1,-1/2,-2/3,0]]);\n",
    "$h->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's show the properties of `$ h`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "name: h\n",
       "type: Polytope<Rational>\n",
       "\n",
       "AFFINE_HULL\n",
       "0 0 0 1\n",
       "\n",
       "\n",
       "BOUNDED\n",
       "true\n",
       "\n",
       "COMBINATORIAL_DIM\n",
       "2\n",
       "\n",
       "CONE_AMBIENT_DIM\n",
       "4\n",
       "\n",
       "CONE_DIM\n",
       "3\n",
       "\n",
       "DUAL_GRAPH\n",
       "type: Graph<Undirected> as Polytope<Rational>::DUAL_GRAPH\n",
       "\n",
       "FACETS\n",
       "1 1 3/4 0\n",
       "1 0 3/2 0\n",
       "1 1 -3/4 0\n",
       "1 0 -3/2 0\n",
       "1 -1 -3/4 0\n",
       "1 -1 3/4 0\n",
       "\n",
       "\n",
       "FEASIBLE\n",
       "true\n",
       "\n",
       "FULL_DIM\n",
       "false\n",
       "\n",
       "GRAPH\n",
       "type: Graph<Undirected> as Polytope<Rational>::GRAPH\n",
       "\n",
       "LINEALITY_DIM\n",
       "0\n",
       "\n",
       "LINEALITY_SPACE\n",
       "\n",
       "\n",
       "N_EDGES\n",
       "6\n",
       "\n",
       "N_POINTS\n",
       "6\n",
       "\n",
       "N_VERTICES\n",
       "6\n",
       "\n",
       "POINTED\n",
       "true\n",
       "\n",
       "POINTS\n",
       "1 1 0 0\n",
       "1 1/2 2/3 0\n",
       "1 -1/2 2/3 0\n",
       "1 -1 0 0\n",
       "1 1/2 -2/3 0\n",
       "1 -1/2 -2/3 0\n",
       "\n",
       "\n",
       "VERTICES\n",
       "1 1 0 0\n",
       "1 1/2 2/3 0\n",
       "1 -1/2 2/3 0\n",
       "1 -1 0 0\n",
       "1 1/2 -2/3 0\n",
       "1 -1/2 -2/3 0\n",
       "\n",
       "\n",
       "VERTICES_IN_FACETS\n",
       "{3 5}\n",
       "{4 5}\n",
       "{2 3}\n",
       "{1 2}\n",
       "{0 1}\n",
       "{0 4}\n",
       "\n"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "$h->properties;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Now let's define `$ c` as the three-dimensional cone generated by the vectors $ \\left(\\begin{array}{c} 0 \\\\ 1 \\\\ 10 \\end{array} \\right) $, $ \\left(\\begin{array}{c} 2/3 \\\\ -1/2 \\\\ 10 \\end{array} \\right) $ y $ \\left(\\begin{array}{c} -2/3 \\\\ -1/2 \\ \\ 10 \\end{array} \\right) $:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:53:20 2021\n",
       "c_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>c_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model65772826246 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_10' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_10' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_10' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_10'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_10'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_10'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_10'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_10'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_10' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_10'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_10' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_10' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_10'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_10\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_10'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_10' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_10' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_10'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_10' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_10' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model65772826246\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model65772826246\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model65772826246');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"c_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(0, 0.1, 1));\n",
       "obj0.userData.points.push(new PMPoint(0.0666667, -0.05, 1));\n",
       "obj0.userData.points.push(new PMPoint(-0.0666667, -0.05, 1));\n",
       "obj0.userData.points.push(new PMPoint(0, 0, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0, 0, 0, 0.02];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\" \", \" \", \" \", \"0\"];\n",
       "obj0.userData.edgeindices = [0, 1, 0, 2, 1, 2, 0, 3, 1, 3, 2, 3];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[2, 3, 1], [0, 3, 2], [1, 3, 0], [2, 1, 0]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = [new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0xFF0000, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } )];\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_10');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_10').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_10').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_10').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_10').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_10').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_10').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_10');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_10';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_10').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_10').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_10').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_10').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_10').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_10');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_10');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_10').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_10').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_10').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_10').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_10').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_10').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_10').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_10').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_10').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_10').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_10').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_10').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "### $c:= cone({(0,1,10), (2/3,-1/2,10), (-2/3,-1/2,10)})\n",
    "$c=new Polytope(POINTS=>[[1,0,0,0],[0,0,1,10],[0,2/3,-1/2,10],[0,-2/3,-1/2,10]]);\n",
    "$c->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's define `$p` as the Minkowski sum of `$h` and `$c`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {
    "scrolled": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:53:58 2021\n",
       "_bounded\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>_bounded</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model64904117866 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_11' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_11' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_11' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_11'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_11'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_11'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_11'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_11'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_11' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_11'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_11' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_11' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_11'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_11\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_11'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_11' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_11' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_11'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_11' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_11' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model64904117866\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model64904117866\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model64904117866');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"_bounded\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(-0.566667, -0.716667, 1));\n",
       "obj0.userData.points.push(new PMPoint(0.566667, -0.716667, 1));\n",
       "obj0.userData.points.push(new PMPoint(1.06667, -0.05, 1));\n",
       "obj0.userData.points.push(new PMPoint(1, 0.1, 1));\n",
       "obj0.userData.points.push(new PMPoint(0.5, 0.766667, 1));\n",
       "obj0.userData.points.push(new PMPoint(-1.06667, -0.05, 1));\n",
       "obj0.userData.points.push(new PMPoint(-1, 0.1, 1));\n",
       "obj0.userData.points.push(new PMPoint(-0.5, 0.766667, 1));\n",
       "obj0.userData.points.push(new PMPoint(-1, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(-0.5, -0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.5, -0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(1, 0, 0));\n",
       "obj0.userData.points.push(new PMPoint(0.5, 0.666667, 0));\n",
       "obj0.userData.points.push(new PMPoint(-0.5, 0.666667, 0));\n",
       "\n",
       "obj0.userData.pointradii = [0, 0, 0, 0, 0, 0, 0, 0, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02];\n",
       "   <!-- Vertex style -->\n",
       "obj0.userData.pointmaterial = new THREE.MeshBasicMaterial( { color: 0xFF0000, side: THREE.DoubleSide, transparent: false } );\n",
       "obj0.userData.pointlabels = [\" \", \" \", \" \", \" \", \" \", \" \", \" \", \" \", \"3\", \"5\", \"4\", \"0\", \"1\", \"2\"];\n",
       "obj0.userData.edgeindices = [0, 1, 1, 2, 2, 3, 3, 4, 0, 5, 5, 6, 4, 7, 6, 7, 5, 8, 6, 8, 0, 9, 8, 9, 1, 10, 9, 10, 2, 11, 3, 11, 10, 11, 4, 12, 11, 12, 7, 13, 8, 13, 12, 13];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[12, 13, 7, 4], [8, 13, 12, 11, 10, 9], [7, 13, 8, 6], [12, 4, 3, 11], [2, 1, 10, 11], [0, 5, 8, 9], [3, 2, 11], [6, 8, 5], [1, 0, 9, 10], [4, 7, 6, 5, 0, 1, 2, 3]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = [new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0xFF0000, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } )];\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_11');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_11').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_11').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_11').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_11').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_11').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_11').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_11');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_11';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_11').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_11').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_11').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_11').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_11').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_11');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_11');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_11').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_11').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_11').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_11').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_11').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_11').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_11').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_11').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_11').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_11').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_11').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_11').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$p=minkowski_sum($h,$c);\n",
    "$p->VISUAL;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's look at the inequalities that define the facets of `$p`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0: -3/2 x2 + 3/20 x3 >= -1\n",
       "1: x3 >= 0\n",
       "2: x1 - 3/4 x2 + 3/40 x3 >= -1\n",
       "3: -x1 - 3/4 x2 + 3/40 x3 >= -1\n",
       "4: -x1 + 3/4 x2 + 5/48 x3 >= -1\n",
       "5: x1 + 3/4 x2 + 5/48 x3 >= -1\n",
       "6: -x1 - 4/9 x2 + 2/45 x3 >= -1\n",
       "7: x1 - 4/9 x2 + 2/45 x3 >= -1\n",
       "8: 3/2 x2 + 3/40 x3 >= -1\n",
       "9: 0 >= -1\n",
       "\n"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print_constraints($p->FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's check the vertices and rays of `$p`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1 1 0 0\n",
       "1 1/2 2/3 0\n",
       "1 -1/2 2/3 0\n",
       "1 -1 0 0\n",
       "1 1/2 -2/3 0\n",
       "1 -1/2 -2/3 0\n",
       "0 0 1 10\n",
       "0 1 -3/4 15\n",
       "0 -1 -3/4 15\n"
      ]
     },
     "execution_count": 31,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print($p->VERTICES);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's check the occurrences between the vertices, rays and facets of `$p`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{1 2 6}\n",
       "{0 1 2 3 4 5}\n",
       "{2 3 6}\n",
       "{0 1 6}\n",
       "{0 4 7}\n",
       "{3 5 8}\n",
       "{0 6 7}\n",
       "{3 6 8}\n",
       "{4 5 7 8}\n",
       "{6 7 8}\n"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print($p->VERTICES_IN_FACETS);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's retrieve the recession cone from `$p`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!--\n",
       "polymake for gintriag\n",
       "Sat Aug 21 11:55:28 2021\n",
       "fan:\n",
       "-->\n",
       "\n",
       "\n",
       "<html>\n",
       "   <head>\n",
       "      <meta charset=utf-8>\n",
       "      <title>fan:</title>\n",
       "      <style>\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "*/\n",
       "         html {overflow: scroll;}\n",
       "         strong{font-size: 18px;}\n",
       "         canvas { z-index: 8; }\n",
       "         input[type='radio'] {margin-left:0;}\n",
       "         input[type='checkbox'] {margin-right:7px; margin-left: 0px; padding-left:0px;}\n",
       "         .group{padding-bottom: 15px;}\n",
       "         .settings * {z-index: 11; }\n",
       "         .settings{z-index: 10; font-family: Arial, Helvetica, sans-serif; margin-left: 30px; visibility: hidden; width: 14em; height: 96%; border: solid 1px silver; padding: 2px; overflow-y: scroll; box-sizing: border-box; background-color: white; position: absolute;}\n",
       "         .indented{margin-left: 20px; margin-top: 10px; padding-bottom: 0px;} \n",
       "         .shownObjectsList{overflow: auto; max-width: 150px; max-height: 150px;}\n",
       "         .showSettingsButton{visibility: visible; z-index: 12; position: absolute }\n",
       "         .hideSettingsButton{visibility: hidden; z-index: 12; position: absolute; opacity: 0.5}\n",
       "         button{margin-left: 0; margin-top: 10px}\n",
       "         img{cursor: pointer;}\n",
       "         .suboption{padding-top: 15px;}\n",
       "         #model24606383064 { width: 100%; height: 100%; }\n",
       "         .threejs_container { width: 100%; height: 75vh;}\n",
       "         .settings{max-height: 74vh} \n",
       "         input[type=range] {\n",
       "           -webkit-appearance: none;\n",
       "           padding:0; \n",
       "           width:90%; \n",
       "           margin-left: auto;\n",
       "           margin-right: auto;\n",
       "           margin-top: 15px;\n",
       "           margin-bottom: 15px;\n",
       "           display: block;\t\n",
       "         }\n",
       "         input[type=range]:focus {\n",
       "           outline: none;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-runnable-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-webkit-slider-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "           -webkit-appearance: none;\n",
       "           margin-top: -5px;\n",
       "         }\n",
       "         input[type=range]:focus::-webkit-slider-runnable-track {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]::-moz-range-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "           background: #E3E3E3;\n",
       "           border-radius: 0px;\n",
       "           border: 0px solid #000000;\n",
       "         }\n",
       "         input[type=range]::-moz-range-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]::-ms-track {\n",
       "           height: 4px;\n",
       "           cursor: pointer;\n",
       "           animate: 0.2s;\n",
       "           background: transparent;\n",
       "           border-color: transparent;\n",
       "           color: transparent;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "           border: 0px solid #000000;\n",
       "           border-radius: 0px;\n",
       "           box-shadow: 0px 0px 0px #000000;\n",
       "         }\n",
       "         input[type=range]::-ms-thumb {\n",
       "           box-shadow: 1px 1px 2px #B8B8B8;\n",
       "           border: 1px solid #ABABAB;\n",
       "           height: 13px;\n",
       "           width: 25px;\n",
       "           border-radius: 20px;\n",
       "           background: #E0E0E0;\n",
       "           cursor: pointer;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-lower {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "         input[type=range]:focus::-ms-fill-upper {\n",
       "           background: #E3E3E3;\n",
       "         }\n",
       "/*\n",
       "// COMMON_CODE_BLOCK_END\n",
       "*/\n",
       "\t\t</style>\n",
       "   </head>\n",
       "<body>\n",
       "   <div class='threejs_container'>\n",
       "\t\t<div id='settings_12' class='settings'>\n",
       "\t\t\t<div class=group id='transparency_12' class='transparency'>\n",
       "\t\t\t\t<strong>Transparency</strong>\n",
       "\t\t\t\t<input id='transparencyRange_12' type='range' min=0 max=1 step=0.01 value=0>\n",
       "\t\t\t</div>\n",
       "\t\t\t\n",
       "\t\t\t<div class=group id='rotation_12'>\n",
       "\t\t\t\t<strong>Rotation</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationX_12'> x-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationY_12'> y-axis</div>\n",
       "\t\t\t\t\t<div><input type='checkbox' id='changeRotationZ_12'> z-axis</div>\n",
       "\t\t\t\t\t<button id='resetButton_12'>Reset</button>\n",
       "\t\t\t\t</div>\n",
       "\n",
       "\t\t\t\t<div class=suboption>Rotation speed</div>\n",
       "\t\t\t\t<input id='rotationSpeedRange_12' type='range' min=0 max=5 step=0.01 value=2>\n",
       "\t\t\t</div>\n",
       "\n",
       "\n",
       "\t\t\t<div class=group id='display_12'>\n",
       "\t\t\t\t<strong>Display</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<div id='shownObjectTypesList_12' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t\t<div class=suboption>Objects</div>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t   <div id='shownObjectsList_12' class='shownObjectsList'></div>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "         \n",
       "         <div class=group id='camera_12'>\n",
       "            <strong>Camera</strong>\n",
       "            <div class=indented>\n",
       "               <form>\n",
       "                  <select id=\"cameraType_12\">\n",
       "                     <option value='perspective' selected> Perspective<br></option>\n",
       "                     <option value='orthographic' > Orthographic<br></option>\n",
       "                  </select>\n",
       "               </form>\n",
       "            </div>\n",
       "         </div>\n",
       "\n",
       "\t\t\t<div class=group id='svg_12'>\n",
       "\t\t\t\t<strong>SVG</strong>\n",
       "\t\t\t\t<div class=indented>\n",
       "\t\t\t\t\t<form>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='download' id='download_12' checked> Download<br>\n",
       "\t\t\t\t\t\t<input type=\"radio\" name='screenshotMode' value='tab' id='tab_12' > New tab<br>\n",
       "\t\t\t\t\t</form>\n",
       "\t\t\t\t\t<button id='takeScreenshot_12'>Screenshot</button>\n",
       "\t\t\t\t</div>\n",
       "\t\t\t</div>\n",
       "\n",
       "\t\t</div>\t<!-- end of settings -->\n",
       "\t\t<img id='hideSettingsButton_12' class='hideSettingsButton' src='/kernelspecs/polymake/close.svg' width=20px\">\n",
       "\t\t<img id='showSettingsButton_12' class='showSettingsButton' src='/kernelspecs/polymake/menu.svg' width=20px\">\n",
       "<div id=\"model24606383064\"></div>\n",
       "</div>\n",
       "   <script>\n",
       "    requirejs.config({\n",
       "      paths: {\n",
       "        three: '/kernelspecs/polymake/three',\n",
       "        TrackballControls: '/kernelspecs/polymake/TrackballControls',\n",
       "        OrbitControls: '/kernelspecs/polymake/OrbitControls',\n",
       "        Projector: '/kernelspecs/polymake/Projector',\n",
       "        SVGRenderer: '/kernelspecs/polymake/SVGRenderer',\n",
       "        WEBGL: '/kernelspecs/polymake/WebGL',\n",
       "      },\n",
       "      shim: {\n",
       "        'three': { exports: 'THREE'},\n",
       "        'SVGRenderer': { deps: [ 'three' ], exports: 'THREE.SVGRenderer' },\n",
       "        'WEBGL': { deps: [ 'three' ], exports: 'THREE.WEBGL' },\n",
       "        'Projector': { deps: [ 'three' ], exports: 'THREE.Projector' },\n",
       "        'TrackballControls': { deps: [ 'three' ], exports: 'THREE.TrackballControls' },\n",
       "        'OrbitControls': { deps: [ 'three' ], exports: 'THREE.OrbitControls' },\n",
       "      }\n",
       "    });\n",
       "    \n",
       "    require(['three'],function(THREE){\n",
       "        window.THREE = THREE;\n",
       "      require(['TrackballControls', 'OrbitControls', 'Projector', 'SVGRenderer', 'WEBGL'],\n",
       "               function(TrackballControls, OrbitControls, Projector, SVGRenderer, WEBGL) {\n",
       "    THREE.TrackballControls = TrackballControls;\n",
       "    THREE.OrbitControls = OrbitControls;\n",
       "    THREE.Projector = Projector;\n",
       "    THREE.SVGRenderer = SVGRenderer;\n",
       "    THREE.WEBGL = WEBGL;\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "\n",
       "const intervalLength = 25; // for automatic animations\n",
       "const explodableModel = false; \n",
       "const modelContains = { points: false, pointlabels: false, lines: false, edgelabels: false, faces: false, arrowheads: false };\n",
       "const foldables = [];\n",
       "\n",
       "var three = document.getElementById(\"model24606383064\");\n",
       "var scene = new THREE.Scene();\n",
       "var renderer = new THREE.WebGLRenderer( { antialias: true } );\n",
       "var svgRenderer = new THREE.SVGRenderer( { antialias: true } );\n",
       "renderer.setPixelRatio( window.devicePixelRatio );\n",
       "renderer.setClearColor(0xFFFFFF, 1);\n",
       "svgRenderer.setClearColor(0xFFFFFF, 1);\n",
       "three.appendChild(renderer.domElement);\n",
       "\n",
       "var frustumSize = 4;\n",
       "var cameras = [new THREE.PerspectiveCamera(75, 1, 0.1, 1000), new THREE.OrthographicCamera()];\n",
       "cameras.forEach(function(cam) {\n",
       "    cam.position.set(0, 0, 5);\n",
       "    cam.lookAt(0, 0, 0);  \n",
       "    cam.up.set(0, 1, 0);         \n",
       "});\n",
       "var controls = [new THREE.TrackballControls(cameras[0], three), new THREE.OrbitControls(cameras[1], three)];\n",
       "var camera, control;\n",
       "\n",
       "controls[0].zoomSpeed = 0.2;\n",
       "controls[0].rotateSpeed = 4;\n",
       "\n",
       "\n",
       "// class to allow move points together with labels and spheres\n",
       "var PMPoint = function (x,y,z) {\n",
       "   this.vector = new THREE.Vector3(x,y,z);\n",
       "   this.sprite = null;\n",
       "   this.sphere = null;\n",
       "}\n",
       "PMPoint.prototype.addLabel = function(labelsprite) {\n",
       "   this.sprite = labelsprite;\n",
       "   this.sprite.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.addSphere = function(spheremesh) {\n",
       "   this.sphere = spheremesh;\n",
       "   this.sphere.position.copy(this.vector);\n",
       "}\n",
       "PMPoint.prototype.set = function(x,y,z) {\n",
       "   this.vector.set(x,y,z);\n",
       "   if (this.sprite) {\n",
       "      this.sprite.position.copy(this.vector);\n",
       "   }\n",
       "   if (this.sphere) {\n",
       "      this.sphere.position.copy(this.vector);\n",
       "   }\n",
       "}\n",
       "PMPoint.prototype.radius = function() {\n",
       "   if (this.sphere) {\n",
       "      return this.sphere.geometry.parameters.radius;\n",
       "   } else {\n",
       "      return 0;\n",
       "   }\n",
       "};\n",
       "// select the target node\n",
       "var target = document.querySelector('#model24606383064');\n",
       "\n",
       "// create an observer instance\n",
       "var observer = new MutationObserver(function(mutations) {\n",
       "   mutations.forEach(function(mutation) {\n",
       "      if (mutation.removedNodes && mutation.removedNodes.length > 0) {\n",
       "         cancelAnimationFrame(renderId);\n",
       "         observer.disconnect();\n",
       "         console.log(\"cancelled frame \"+renderId);\n",
       "      }\n",
       "   });\n",
       "});\n",
       "\n",
       "// configuration of the observer:\n",
       "var config = { childList: true, characterData: true }\n",
       "\n",
       "// pass in the target node, as well as the observer options\n",
       "while (target) {\n",
       "   if (target.className==\"output\") {\n",
       "      observer.observe(target, config);\n",
       "      break;\n",
       "   }\n",
       "   target = target.parentNode;\n",
       "}\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "var obj0 = new THREE.Object3D();\n",
       "obj0.name = \"unnamed__1\";\n",
       "obj0.userData.explodable = 1;\n",
       "obj0.userData.points = [];\n",
       "obj0.userData.points.push(new PMPoint(0, 0.0995037, 0.995037));\n",
       "obj0.userData.points.push(new PMPoint(0.0664364, -0.0498273, 0.996546));\n",
       "obj0.userData.points.push(new PMPoint(-0.0664364, -0.0498273, 0.996546));\n",
       "obj0.userData.points.push(new PMPoint(0, 0, 0));\n",
       "\n",
       "obj0.userData.edgeindices = [0, 1, 0, 2, 1, 2, 0, 3, 1, 3, 2, 3];\n",
       "   <!-- Edge style -->\n",
       "obj0.userData.edgematerial = new THREE.LineBasicMaterial( { color: 0x000000, depthTest: true, linewidth: 1.5, transparent: false } );\n",
       "obj0.userData.facets = [[3, 1, 2], [0, 1, 3], [3, 2, 0], [2, 1, 0]];\n",
       "   <!-- Facet style -->\n",
       "obj0.userData.facetmaterial = [new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0x77EC9E, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } ),\n",
       "new THREE.MeshBasicMaterial( { color: 0xFF0000, depthFunc: THREE.LessDepth, opacity: 1, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 0.5, side: THREE.DoubleSide, transparent: true } )];\n",
       "init_object(obj0);\n",
       "scene.add(obj0);\n",
       "\n",
       "// COMMON_CODE_BLOCK_BEGIN\n",
       "function textSpriteMaterial(message, parameters) {\n",
       "    if ( parameters === undefined ) parameters = {};\n",
       "    var fontface = \"Helvetica\";\n",
       "    var fontsize = parameters.hasOwnProperty(\"fontsize\") ? parameters[\"fontsize\"] : 15;\n",
       "    fontsize = fontsize*10;\n",
       "    var lines = message.split('\\\\n');\n",
       "    var size = 512;\n",
       "    for(var i = 0; i<lines.length; i++){\n",
       "        var tmp = lines[i].length;\n",
       "        while(tmp*fontsize > size){\n",
       "           fontsize--;\n",
       "        }\n",
       "    }\n",
       "    \n",
       "    var canvas = document.createElement('canvas');\n",
       "    canvas.width = size;\n",
       "    canvas.height = size;\n",
       "    var context = canvas.getContext('2d');\n",
       "    context.fillStyle = \"rgba(255, 255, 255, 0)\";\n",
       "    context.fill();\n",
       "    context.font = fontsize + \"px \" + fontface;\n",
       "    \n",
       "    // text color\n",
       "    context.fillStyle = \"rgba(0, 0, 0, 1.0)\";\n",
       "     for(var i = 0; i<lines.length; i++){\n",
       "        context.fillText(lines[i], size/2, size/2+i*fontsize);\n",
       "     }\n",
       "    \n",
       "    // canvas contents will be used for a texture\n",
       "    var texture = new THREE.Texture(canvas);\n",
       "    texture.needsUpdate = true;\n",
       "    \n",
       "    var spriteMaterial = new THREE.SpriteMaterial({map: texture, depthTest: true, depthWrite: false, polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: 1 });\n",
       "    return spriteMaterial;\n",
       "}\n",
       "\n",
       "\n",
       "// ---------------------- INITIALIZING OBJECTS--------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function init_object(obj) {\n",
       "    if (obj.userData.hasOwnProperty(\"pointmaterial\")) {\n",
       "        init_points(obj);\n",
       "        modelContains.points = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"pointlabels\")) {\n",
       "        init_pointlabels(obj);\n",
       "        modelContains.pointlabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgematerial\")) {\n",
       "        init_lines(obj);\n",
       "        modelContains.lines = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"edgelabels\")) {\n",
       "        init_edgelabels(obj);\n",
       "        modelContains.edgelabels = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"arrowstyle\")) {\n",
       "        init_arrowheads(obj);\n",
       "        modelContains.arrowheads = true;\n",
       "    }\n",
       "    if (obj.userData.hasOwnProperty(\"facetmaterial\")) {\n",
       "        init_faces(obj);\n",
       "        modelContains.faces = true;\n",
       "    }\n",
       "}\n",
       "\n",
       "function init_points(obj) {\n",
       "    var pointgroup = new THREE.Group();\n",
       "    pointgroup.name = \"points\";\n",
       "    var points = obj.userData.points;\n",
       "    var radii = obj.userData.pointradii;\n",
       "    var materials = obj.userData.pointmaterial;\n",
       "    var geometry,material;\n",
       "    if (!Array.isArray(radii)) {\n",
       "        geometry = new THREE.SphereBufferGeometry(radii);  \n",
       "    }\n",
       "    if (!Array.isArray(materials)) {\n",
       "        material = materials;\n",
       "    }\n",
       "    for (var i=0; i<points.length; i++) {\n",
       "        var point = points[i];\n",
       "        if (Array.isArray(radii)) {\n",
       "            if (radii[i] == 0) {\n",
       "                continue;\n",
       "            }\n",
       "            geometry = new THREE.SphereBufferGeometry(radii[i]);  \n",
       "        } \n",
       "        if (Array.isArray(materials)) {\n",
       "            material = materials[i];     \n",
       "        } \n",
       "        var sphere = new THREE.Mesh(geometry, material);\n",
       "        point.addSphere(sphere);\n",
       "        pointgroup.add(sphere);\n",
       "    }\n",
       "    obj.add(pointgroup);\n",
       "}\n",
       "\n",
       "function init_pointlabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var labels = obj.userData.pointlabels;\n",
       "    var pointlabels = new THREE.Group();\n",
       "    pointlabels.name = \"pointlabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<points.length; i++) {\n",
       "            var point = points[i];\n",
       "\t        var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            point.addLabel(sprite);\n",
       "            pointlabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(pointlabels);\n",
       "}\n",
       "\n",
       "function init_lines(obj) {\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var points = obj.userData.points;\n",
       "    var materials = obj.userData.edgematerial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    var bufarr = new Float32Array( obj.userData.edgeindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute( bufarr, 3 );\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position', bufattr);\n",
       "    if (Array.isArray(materials)) {     \n",
       "        for (var i=0; i<materials.length; i++) {\n",
       "            geometry.addGroup(2*i,2,i);\n",
       "        }\n",
       "    }\n",
       "    var lines = new THREE.LineSegments(geometry, materials);\n",
       "    lines.name = \"lines\";\n",
       "    obj.add(lines);\n",
       "    updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "function init_edgelabels(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var labels = obj.userData.edgelabels;\n",
       "    var edgelabels = new THREE.Group();\n",
       "    edgelabels.name = \"edgelabels\";\n",
       "    if (Array.isArray(labels)) {\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var spriteMaterial = textSpriteMaterial( labels[i] );\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    } else {\n",
       "        var spriteMaterial = textSpriteMaterial( labels );\n",
       "        for (var i=0; i<edgeindices.length/2; i++) {\n",
       "            var sprite = new THREE.Sprite(spriteMaterial);\n",
       "            sprite.position.copy(new THREE.Vector3().addVectors(points[edgeindices[2*i]].vector,points[edgeindices[2*i+1]].vector).multiplyScalar(0.5));\n",
       "            edgelabels.add(sprite);\n",
       "        }\n",
       "    }\n",
       "    obj.add(edgelabels);\n",
       "}\n",
       "\n",
       "function init_arrowheads(obj) {\n",
       "    var arrowheads = new THREE.Group();\n",
       "    arrowheads.name = \"arrowheads\";\n",
       "    var arrowstyle = obj.userData.arrowstyle;\n",
       "    var edgeindices = obj.userData.edgeindices;\n",
       "    var edgematerials = obj.userData.edgematerial;\n",
       "    var points = obj.userData.points;\n",
       "    var material;\n",
       "    if (!Array.isArray(edgematerials)) {\n",
       "        material = new THREE.MeshBasicMaterial( {color: edgematerials.color} );\n",
       "    }\n",
       "\n",
       "    for (var i=0; i<edgeindices.length; i=i+2) {\n",
       "        var start = points[edgeindices[i]];\n",
       "        var end = points[edgeindices[i+1]];\n",
       "        var dist = start.vector.distanceTo( end.vector ) - start.radius() - end.radius();\n",
       "        if (dist <= 0) {\n",
       "            continue;\n",
       "        }\n",
       "        var dir = new THREE.Vector3().subVectors(end.vector,start.vector);\n",
       "        dir.normalize();\n",
       "        var axis = new THREE.Vector3().set(dir.z,0,-dir.x);\n",
       "        axis.normalize();\n",
       "        var radians = Math.acos( dir.y );\n",
       "        var radius = dist/25;\n",
       "        var height = dist/5;\n",
       "        var geometry = new THREE.ConeBufferGeometry(radius,height);\n",
       "        var position = new THREE.Vector3().addVectors(start.vector,dir.clone().multiplyScalar(start.radius()+dist-height/2));\n",
       "        if (Array.isArray(edgematerials)) {\n",
       "            material = new THREE.MeshBasicMaterial( {color: edgematerials[i].color} );\n",
       "        }\n",
       "        var cone = new THREE.Mesh( geometry, material );\n",
       "        cone.quaternion.setFromAxisAngle(axis,radians);;\n",
       "        cone.position.copy(position);;\n",
       "        arrowheads.add(cone);\n",
       "    }\n",
       "    obj.add(arrowheads);\n",
       "}\n",
       "\n",
       "function init_faces(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var facets = obj.userData.facets;\n",
       "    obj.userData.triangleindices = [];\n",
       "    for (var i=0; i<facets.length; i++) {\n",
       "        facet = facets[i];\n",
       "        for (var t=0; t<facet.length-2; t++) {\n",
       "            obj.userData.triangleindices.push(facet[0],facet[t+1],facet[t+2]);  \n",
       "        }\n",
       "    }\n",
       "    var bufarr = new Float32Array( obj.userData.triangleindices.length * 3 );\n",
       "    var bufattr = new THREE.Float32BufferAttribute(bufarr,3);\n",
       "    \n",
       "    var materials = obj.userData.facetmaterial;\n",
       "    var geometry = new THREE.BufferGeometry();\n",
       "    geometry.setAttribute('position',bufattr);\n",
       "    if (Array.isArray(materials)) {\n",
       "        var tricount = 0;\n",
       "        var facet;\n",
       "        for (var i=0; i<facets.length; i++) {\n",
       "            facet = facets[i];\n",
       "            geometry.addGroup(tricount,(facet.length-2)*3,i);\n",
       "            tricount += (facet.length-2)*3;\n",
       "        }\n",
       "    }\n",
       "    var mesh = new THREE.Mesh(geometry, materials);\n",
       "    mesh.name = \"faces\";\n",
       "    obj.add(mesh); \n",
       "    updateFacesPosition(obj);\n",
       "}\n",
       "// //INITIALIZING\n",
       "\n",
       "\n",
       "function updateFacesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.triangleindices;\n",
       "    var faces = obj.getObjectByName(\"faces\");\n",
       "    var ba = faces.geometry.getAttribute(\"position\");\n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    faces.geometry.attributes.position.needsUpdate = true;\n",
       "    \n",
       "}\n",
       "\n",
       "function updateEdgesPosition(obj) {\n",
       "    var points = obj.userData.points;\n",
       "    var indices = obj.userData.edgeindices;\n",
       "    var lines = obj.getObjectByName(\"lines\");\n",
       "    var ba = lines.geometry.getAttribute(\"position\"); \n",
       "    for (var i=0; i<indices.length; i++) {\n",
       "        ba.setXYZ(i, points[indices[i]].vector.x, points[indices[i]].vector.y ,points[indices[i]].vector.z); \n",
       "    }\n",
       "    lines.geometry.attributes.position.needsUpdate = true;\n",
       "}\n",
       "\n",
       "function onWindowResize() {\n",
       "    renderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    svgRenderer.setSize( three.clientWidth, three.clientHeight );\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "function updateCamera() {\n",
       "    var width = three.clientWidth;\n",
       "    var height = three.clientHeight;\n",
       "    var aspect = width / height;\n",
       "    if (camera.type == \"OrthographicCamera\") {\n",
       "        camera.left = frustumSize * aspect / - 2;\n",
       "        camera.right = frustumSize * aspect / 2;\n",
       "        camera.top = frustumSize / 2;\n",
       "        camera.bottom = - frustumSize / 2;\n",
       "    } else if (camera.type == \"PerspectiveCamera\") {\n",
       "        camera.aspect = aspect;\n",
       "    }\n",
       "    camera.updateProjectionMatrix();\n",
       "}\n",
       "\n",
       "function changeCamera(event) {\n",
       "    var selindex = event.currentTarget.selectedIndex;\n",
       "    camera = cameras[selindex];\n",
       "    control = controls[selindex];\n",
       "    control.enabled = true; \n",
       "    for (var i=0; i<controls.length; i++) {\n",
       "        if (i!=selindex) {\n",
       "            controls[i].enabled = false;\n",
       "        }\n",
       "    }\n",
       "    updateCamera();\n",
       "}\n",
       "\n",
       "var camtypenode = document.getElementById('cameraType_12');\n",
       "camtypenode.onchange = changeCamera;\n",
       "camtypenode.dispatchEvent(new Event('change'));\n",
       "\n",
       "onWindowResize();\n",
       "window.addEventListener('resize', onWindowResize);\t\n",
       "\n",
       "\n",
       "var xRotationEnabled = false;\n",
       "var yRotationEnabled = false;\n",
       "var zRotationEnabled = false;\n",
       "var rotationSpeedFactor = 1;\n",
       "var settingsShown = false;\n",
       "var labelsShown = true;\n",
       "var intervals = [];\n",
       "var timeouts = [];\n",
       "var explodingSpeed = 0.05;\n",
       "var explodeScale = 0;\n",
       "var XMLS = new XMLSerializer();\n",
       "var svgElement;\n",
       "var renderId;\n",
       "\n",
       "var render = function () {\n",
       "\n",
       "\trenderId = requestAnimationFrame(render);\n",
       "\n",
       "//\tcomment in for automatic explosion\n",
       "//\texplode(updateFactor());\n",
       "\n",
       "    var phi = 0.02 * rotationSpeedFactor;\n",
       "\n",
       "    if (xRotationEnabled) {\n",
       "        scene.rotation.x += phi;\n",
       "    }\n",
       "    if (yRotationEnabled) {\n",
       "        scene.rotation.y += phi;\n",
       "    }\n",
       "    if (zRotationEnabled) {\n",
       "        scene.rotation.z += phi;\n",
       "    }\n",
       "\n",
       "    control.update();\n",
       "    renderer.render(scene, camera);\n",
       "};\n",
       "\n",
       "if ( THREE.WEBGL.isWebGLAvailable() ) {\n",
       "\trender();\n",
       "} else {\n",
       "\tvar warning = WEBGL.getWebGLErrorMessage();\n",
       "\tthree.appendChild( warning );\n",
       "}\n",
       "    \n",
       "function changeTransparency() {\n",
       "    var opacity = 1-Number(event.currentTarget.value);\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        child = scene.children[i];\n",
       "        if ( child.userData.hasOwnProperty(\"facetmaterial\") ) {\n",
       "            if (Array.isArray(child.userData.facetmaterial)) {\n",
       "                for (var j=0; j<child.userData.facetmaterial.length; j++) {\n",
       "                    child.userData.facetmaterial[j].opacity = opacity;\n",
       "                }\n",
       "            } else {\n",
       "                child.userData.facetmaterial.opacity = opacity;\n",
       "            }    \n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function changeRotationX(event){\n",
       "    xRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationY(event){\n",
       "    yRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "function changeRotationZ(event){\n",
       "    zRotationEnabled = event.currentTarget.checked;\n",
       "}\t\n",
       "\n",
       "\n",
       "function changeRotationSpeedFactor(event){\n",
       "    rotationSpeedFactor = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function resetScene(){\n",
       "    scene.rotation.set(0,0,0);\n",
       "    camera.position.set(0,0,5);\n",
       "    camera.up.set(0,1,0);\n",
       "}\n",
       "\n",
       "function showSettings(event){\n",
       "    document.getElementById('settings_12').style.visibility = 'visible';\n",
       "    document.getElementById('showSettingsButton_12').style.visibility = 'hidden';\n",
       "    document.getElementById('hideSettingsButton_12').style.visibility = 'visible';\n",
       "    settingsShown = true;\n",
       "}\n",
       "\n",
       "function hideSettings(event){\n",
       "    document.getElementById('settings_12').style.visibility = 'hidden';\n",
       "    document.getElementById('showSettingsButton_12').style.visibility = 'visible';\n",
       "    document.getElementById('hideSettingsButton_12').style.visibility = 'hidden';\n",
       "    settingsShown = false;\n",
       "}\n",
       "\n",
       "\n",
       "\n",
       "var pos = 150* Math.PI;\n",
       "\n",
       "function updateFactor() {\n",
       "    pos++;\n",
       "    return Math.sin(.01*pos)+1;\n",
       "}\n",
       "\n",
       "// ------------------------ FOLDING ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "// rotate point p around axis defined by points p1 and p2 by given angle\n",
       "function rotate(p, p1, p2, angle ){   \n",
       "    angle = -angle;\n",
       "    var x = p.x, y = p.y, z = p.z, \n",
       "    a = p1.x, b = p1.y, c = p1.z, \n",
       "    u = p2.x-p1.x, v = p2.y-p1.y, w = p2.z-p1.z;\n",
       "    var result = [];\n",
       "    var L = u*u + v*v + w*w;\n",
       "    var sqrt = Math.sqrt;\n",
       "    var cos = Math.cos;\n",
       "    var sin = Math.sin;\n",
       "\n",
       "    result[0] = ((a*(v*v+w*w)-u*(b*v+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*x*cos(angle)+sqrt(L)*(-c*v+b*w-w*y+v*z)*sin(angle))/L;\n",
       "    result[1] = ((b*(u*u+w*w)-v*(a*u+c*w-u*x-v*y-w*z))*(1-cos(angle))+L*y*cos(angle)+sqrt(L)*(c*u-a*w+w*x-u*z)*sin(angle))/L;\n",
       "    result[2] = ((c*(u*u+v*v)-w*(a*u+b*v-u*x-v*y-w*z))*(1-cos(angle))+L*z*cos(angle)+sqrt(L)*(-b*u+a*v-v*x+u*y)*sin(angle))/L;\n",
       "\n",
       "    return result;\n",
       "}\n",
       "\n",
       "var fold = function(event){\n",
       "    var obj = foldables[Number(event.currentTarget.name)];\n",
       "    var foldvalue = Number(event.currentTarget.value);\n",
       "    var scale = foldvalue - obj.userData.oldscale;\n",
       "\n",
       "    for (var j=0; j<obj.userData.axes.length; j++) {\n",
       "        rotateVertices(obj, j, scale);\n",
       "    }\n",
       "    update(obj);\n",
       "    obj.userData.oldscale += scale;\n",
       "    lookAtBarycenter(obj);\n",
       "}\n",
       "\n",
       "function lookAtBarycenter(obj){\n",
       "    control.target = barycenter(obj);\n",
       "}\n",
       "\n",
       "function barycenter(obj) {\n",
       "    var center = new THREE.Vector3(0,0,0);\n",
       "    var points = obj.userData.points;\n",
       "    for (var i=0; i<points.length; i++){\n",
       "        center.add(points[i].vector);\n",
       "    }\n",
       "    center.divideScalar(points.length);\n",
       "    return center;\n",
       "}\n",
       "\n",
       "function rotateVertices(obj, edge, scale) {\n",
       "    var axes = obj.userData.axes;\n",
       "    var subtrees = obj.userData.subtrees;\n",
       "    var points = obj.userData.points;\n",
       "    var angles = obj.userData.angles;\n",
       "    if (edge < axes.length){\n",
       "        for (var j=0; j<subtrees[edge].length; j++){\n",
       "            var rotP = rotate(points[subtrees[edge][j]].vector, points[axes[edge][0]].vector,points[axes[edge][1]].vector, scale * (Math.PI - angles[edge]));\n",
       "            points[subtrees[edge][j]].set(rotP[0],rotP[1],rotP[2]);\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function update(obj) {\n",
       "   updateFacesPosition(obj);\n",
       "   updateEdgesPosition(obj);\n",
       "}\n",
       "\n",
       "if (foldables.length) {\n",
       "    var settings = document.getElementById('settings_12');\n",
       "    var foldDiv = document.createElement('div');\n",
       "    foldDiv.id = 'fold_12';\n",
       "    var title = document.createElement('strong');\n",
       "    title.innerHTML = 'Fold';\n",
       "    foldDiv.appendChild(title);\n",
       "    foldDiv.className = 'group';\n",
       "    for (var i=0; i<foldables.length; i++) {\n",
       "        var range = document.createElement('input');\n",
       "        range.type = 'range';\n",
       "        range.min = 0;\n",
       "        range.max = 1;\n",
       "        range.value = 0;\n",
       "        range.step = 0.001;\n",
       "        range.name = String(i);\n",
       "        range.oninput = fold;\n",
       "        foldDiv.appendChild(range);\n",
       "    }\n",
       "    lookAtBarycenter(foldables[0]);\n",
       "    settings.insertBefore(foldDiv,settings.childNodes[0]);\n",
       "}\n",
       "\n",
       "    \n",
       "// ---------------------- EXPLOSION ------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "if (explodableModel) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        obj = scene.children[i];\n",
       "        if ( obj.userData.explodable ) {\n",
       "            computeCentroid(obj);\n",
       "        }\n",
       "    }\n",
       "    document.getElementById('explodeRange_12').oninput = triggerExplode;\n",
       "    document.getElementById('explodeCheckbox_12').onchange = triggerAutomaticExplode;\n",
       "    document.getElementById('explodingSpeedRange_12').oninput = setExplodingSpeed;\n",
       "}\n",
       "\n",
       "function computeCentroid(obj) {\n",
       "    centroid = new THREE.Vector3();\n",
       "    obj.userData.points.forEach(function(pmpoint) {\n",
       "        centroid.add(pmpoint.vector);\t\t\t\n",
       "    });\n",
       "    centroid.divideScalar(obj.userData.points.length);\n",
       "    obj.userData.centroid = centroid;\n",
       "}\n",
       "\n",
       "function explode(factor) {\n",
       "    for (var i=0; i<scene.children.length; i++) {\n",
       "        var obj = scene.children[i];\n",
       "        if (obj.userData.hasOwnProperty(\"centroid\")) { \n",
       "            var c = obj.userData.centroid;\n",
       "            obj.position.set(c.x*factor, c.y*factor, c.z*factor);\n",
       "        }\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function triggerExplode(event){\n",
       "    explodeScale = Number(event.currentTarget.value);\n",
       "    explode(explodeScale);\n",
       "}\n",
       "\n",
       "function setExplodingSpeed(event){\n",
       "    explodingSpeed = Number(event.currentTarget.value);\n",
       "}\n",
       "\n",
       "function triggerAutomaticExplode(event){\n",
       "    if (event.currentTarget.checked){\n",
       "        startExploding();\n",
       "    } else {\n",
       "        clearIntervals();\n",
       "    }\t\n",
       "}\n",
       "\n",
       "function startExploding(){\n",
       "    intervals.push(setInterval(explodingInterval, 25));\n",
       "}\n",
       "\n",
       "\n",
       "function explodingInterval(){\n",
       "    explodeScale += explodingSpeed;\n",
       "    if (explodeScale <= 6){ \n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else{\n",
       "        explode(6);\n",
       "        explodeScale = 6;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startUnexploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_12').value = explodeScale;\n",
       "}\n",
       "\n",
       "\n",
       "function startUnexploding(){\n",
       "    intervals.push(setInterval(unexplodingInterval, 25));\n",
       "}\n",
       "\n",
       "function unexplodingInterval(){\n",
       "    explodeScale -= explodingSpeed;\n",
       "    if (explodeScale >= 0){\t\n",
       "        explode(explodeScale);\n",
       "    }\n",
       "    else {\n",
       "        explode(0);\n",
       "        explodeScale = 0;\n",
       "        clearIntervals();\n",
       "        timeouts.push(setTimeout(startExploding, 3000));\n",
       "    }\n",
       "    document.getElementById('explodeRange_12').value = explodeScale;\n",
       "}\n",
       "\n",
       "function clearIntervals(){\n",
       "    intervals.forEach(function(interval){\n",
       "        clearInterval(interval);\n",
       "    });\n",
       "    intervals = [];\n",
       "    timeouts.forEach(function(timeout){\n",
       "        clearTimeout(timeout);\n",
       "    });\n",
       "    timeouts = [];\n",
       "}\n",
       "\n",
       "// ---------------------- DISPLAY --------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "const objectTypeInnerHTMLs = { points: \"Points\", pointlabels: \"Point labels\", lines: \"Edges\", edgelabels: \"Edge labels\", faces: \"Faces\", arrowheads: \"Arrow heads\" };\n",
       "const objectTypeVisible = {};\n",
       "Object.assign(objectTypeVisible,modelContains);\n",
       "const sortedObjectTypeKeys = Object.keys(objectTypeInnerHTMLs).sort();\n",
       "const shownObjectTypesList = document.getElementById('shownObjectTypesList_12');\n",
       "\n",
       "function setVisibility(bool,objname) {\n",
       "    for (var i=0; i<scene.children.length; i++){\n",
       "        var obj = scene.children[i].getObjectByName(objname);\n",
       "        if (obj) {\n",
       "            obj.visible = bool;\n",
       "        }\n",
       "    }\n",
       "}\n",
       "\n",
       "function toggleObjectTypeVisibility(event){\n",
       "    var name = event.currentTarget.name;\n",
       "    var checked = event.currentTarget.checked;\n",
       "    objectTypeVisible[name] = checked;\n",
       "    setVisibility(checked,name);\n",
       "}\n",
       "\n",
       "for (var i=0; i<sortedObjectTypeKeys.length; i++){\n",
       "    var key = sortedObjectTypeKeys[i];\n",
       "    if (modelContains[key]) {\n",
       "        var objTypeNode = document.createElement('span');\n",
       "        objTypeNode.innerHTML = objectTypeInnerHTMLs[key] + '<br>';\n",
       "        var checkbox = document.createElement('input');\n",
       "        checkbox.type = 'checkbox';\n",
       "        checkbox.checked = true;\n",
       "        checkbox.name = key;\n",
       "        checkbox.onchange = toggleObjectTypeVisibility;\n",
       "        shownObjectTypesList.appendChild(checkbox);\n",
       "        shownObjectTypesList.appendChild(objTypeNode);\n",
       "    }\n",
       "}\n",
       "\n",
       "// ------------------------------------------------------\n",
       "\n",
       "function toggleObjectVisibility(event){\n",
       "    var nr = Number(event.currentTarget.name);\n",
       "    scene.children[nr].visible = event.currentTarget.checked;\n",
       "}\n",
       "\n",
       "// append checkboxes for displaying or hiding objects\n",
       "var shownObjectsList = document.getElementById('shownObjectsList_12');\n",
       "for (var i=0; i<scene.children.length; i++){\n",
       "    obj = scene.children[i];\n",
       "    var objNode = document.createElement('span');\n",
       "    objNode.innerHTML = obj.name + '<br>';\n",
       "    var checkbox = document.createElement('input');\n",
       "    checkbox.type = 'checkbox';\n",
       "    checkbox.checked = true;\n",
       "    checkbox.name = String(i);\n",
       "    checkbox.onchange = toggleObjectVisibility;\n",
       "    shownObjectsList.appendChild(checkbox);\n",
       "    shownObjectsList.appendChild(objNode);\n",
       "}\n",
       "\n",
       "// ---------------------- SVG ------------------------------------------------------\n",
       "// ---------------------------------------------------------------------------------\n",
       "\n",
       "function takeSvgScreenshot() {\n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(false,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(false,\"edgelabels\");\n",
       "    }\n",
       "    svgRenderer.render(scene,camera);\n",
       "    svgElement = XMLS.serializeToString(svgRenderer.domElement);\n",
       "    \n",
       "    if (objectTypeVisible[\"pointlabels\"]) {\n",
       "        setVisibility(true,\"pointlabels\");\n",
       "    }\n",
       "    if (objectTypeVisible[\"edgelabels\"]) {\n",
       "        setVisibility(true,\"edgelabels\");\n",
       "    }\n",
       "\n",
       "    if (document.getElementById('tab_12').checked){\n",
       "        //show in new tab\n",
       "        var myWindow = window.open(\"\",\"\");\n",
       "        myWindow.document.body.innerHTML = svgElement;\n",
       "    } else{\n",
       "        // download svg file \n",
       "        download(\"screenshot.svg\", svgElement);\n",
       "    }\n",
       "}\n",
       "\n",
       "function download(filename, text) {\n",
       "    var element = document.createElement('a');\n",
       "    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));\n",
       "    element.setAttribute('download', filename);\n",
       "\n",
       "    element.style.display = 'none';\n",
       "    document.body.appendChild(element);\n",
       "\n",
       "    element.click();\n",
       "\n",
       "    document.body.removeChild(element);\n",
       "}\n",
       "\n",
       "\n",
       "document.getElementById('transparencyRange_12').oninput = changeTransparency;\n",
       "document.getElementById('changeRotationX_12').onchange = changeRotationX;\n",
       "document.getElementById('changeRotationY_12').onchange = changeRotationY;\n",
       "document.getElementById('changeRotationZ_12').onchange = changeRotationZ;\n",
       "document.getElementById('resetButton_12').onclick = resetScene;\n",
       "document.getElementById('rotationSpeedRange_12').oninput = changeRotationSpeedFactor;\n",
       "document.getElementById('takeScreenshot_12').onclick = takeSvgScreenshot;\n",
       "document.getElementById('showSettingsButton_12').onclick = showSettings;\n",
       "document.getElementById('hideSettingsButton_12').onclick = hideSettings;\n",
       "\n",
       "\n",
       "// ------------------ SHORTCUTS --------------------------------------------\n",
       "// -------------------------------------------------------------------------\n",
       "\n",
       "/**\n",
       " * http://www.openjs.com/scripts/events/keyboard_shortcuts/\n",
       " * Version : 2.01.B\n",
       " * By Binny V A\n",
       " * License : BSD\n",
       " */\n",
       "shortcut = {\n",
       "\t'all_shortcuts':{},//All the shortcuts are stored in this array\n",
       "\t'add': function(shortcut_combination,callback,opt) {\n",
       "\t\t//Provide a set of default options\n",
       "\t\tvar default_options = {\n",
       "\t\t\t'type':'keydown',\n",
       "\t\t\t'propagate':false,\n",
       "\t\t\t'disable_in_input':false,\n",
       "\t\t\t'target':document,\n",
       "\t\t\t'keycode':false\n",
       "\t\t}\n",
       "\t\tif(!opt) opt = default_options;\n",
       "\t\telse {\n",
       "\t\t\tfor(var dfo in default_options) {\n",
       "\t\t\t\tif(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\n",
       "\t\tvar ele = opt.target;\n",
       "\t\tif(typeof opt.target == 'string') ele = document.getElementById(opt.target);\n",
       "\t\tvar ths = this;\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\n",
       "\t\t//The function to be called at keypress\n",
       "\t\tvar func = function(e) {\n",
       "\t\t\te = e || window.event;\n",
       "\t\t\t\n",
       "\t\t\tif(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields\n",
       "\t\t\t\tvar element;\n",
       "\t\t\t\tif(e.target) element=e.target;\n",
       "\t\t\t\telse if(e.srcElement) element=e.srcElement;\n",
       "\t\t\t\tif(element.nodeType==3) element=element.parentNode;\n",
       "\n",
       "\t\t\t\tif(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\t//Find Which key is pressed\n",
       "\t\t\tif (e.keyCode) code = e.keyCode;\n",
       "\t\t\telse if (e.which) code = e.which;\n",
       "\t\t\tvar character = String.fromCharCode(code).toLowerCase();\n",
       "\t\t\t\n",
       "\t\t\tif(code == 188) character=\",\"; //If the user presses , when the type is onkeydown\n",
       "\t\t\tif(code == 190) character=\".\"; //If the user presses , when the type is onkeydown\n",
       "\n",
       "\t\t\tvar keys = shortcut_combination.split(\"+\");\n",
       "\t\t\t//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked\n",
       "\t\t\tvar kp = 0;\n",
       "\t\t\t\n",
       "\t\t\t//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken\n",
       "\t\t\tvar shift_nums = {\n",
       "\t\t\t\t\"`\":\"~\",\n",
       "\t\t\t\t\"1\":\"!\",\n",
       "\t\t\t\t\"2\":\"@\",\n",
       "\t\t\t\t\"3\":\"#\",\n",
       "\t\t\t\t\"4\":\"$\",\n",
       "\t\t\t\t\"5\":\"%\",\n",
       "\t\t\t\t\"6\":\"^\",\n",
       "\t\t\t\t\"7\":\"&\",\n",
       "\t\t\t\t\"8\":\"*\",\n",
       "\t\t\t\t\"9\":\"(\",\n",
       "\t\t\t\t\"0\":\")\",\n",
       "\t\t\t\t\"-\":\"_\",\n",
       "\t\t\t\t\"=\":\"+\",\n",
       "\t\t\t\t\";\":\":\",\n",
       "\t\t\t\t\"'\":\"\\\"\",\n",
       "\t\t\t\t\",\":\"<\",\n",
       "\t\t\t\t\".\":\">\",\n",
       "\t\t\t\t\"/\":\"?\",\n",
       "\t\t\t\t\"\\\\\":\"|\"\n",
       "\t\t\t}\n",
       "\t\t\t//Special Keys - and their codes\n",
       "\t\t\tvar special_keys = {\n",
       "\t\t\t\t'esc':27,\n",
       "\t\t\t\t'escape':27,\n",
       "\t\t\t\t'tab':9,\n",
       "\t\t\t\t'space':32,\n",
       "\t\t\t\t'return':13,\n",
       "\t\t\t\t'enter':13,\n",
       "\t\t\t\t'backspace':8,\n",
       "\t\n",
       "\t\t\t\t'scrolllock':145,\n",
       "\t\t\t\t'scroll_lock':145,\n",
       "\t\t\t\t'scroll':145,\n",
       "\t\t\t\t'capslock':20,\n",
       "\t\t\t\t'caps_lock':20,\n",
       "\t\t\t\t'caps':20,\n",
       "\t\t\t\t'numlock':144,\n",
       "\t\t\t\t'num_lock':144,\n",
       "\t\t\t\t'num':144,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pause':19,\n",
       "\t\t\t\t'break':19,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'insert':45,\n",
       "\t\t\t\t'home':36,\n",
       "\t\t\t\t'delete':46,\n",
       "\t\t\t\t'end':35,\n",
       "\t\t\t\t\n",
       "\t\t\t\t'pageup':33,\n",
       "\t\t\t\t'page_up':33,\n",
       "\t\t\t\t'pu':33,\n",
       "\t\n",
       "\t\t\t\t'pagedown':34,\n",
       "\t\t\t\t'page_down':34,\n",
       "\t\t\t\t'pd':34,\n",
       "\t\n",
       "\t\t\t\t'left':37,\n",
       "\t\t\t\t'up':38,\n",
       "\t\t\t\t'right':39,\n",
       "\t\t\t\t'down':40,\n",
       "\t\n",
       "\t\t\t\t'f1':112,\n",
       "\t\t\t\t'f2':113,\n",
       "\t\t\t\t'f3':114,\n",
       "\t\t\t\t'f4':115,\n",
       "\t\t\t\t'f5':116,\n",
       "\t\t\t\t'f6':117,\n",
       "\t\t\t\t'f7':118,\n",
       "\t\t\t\t'f8':119,\n",
       "\t\t\t\t'f9':120,\n",
       "\t\t\t\t'f10':121,\n",
       "\t\t\t\t'f11':122,\n",
       "\t\t\t\t'f12':123\n",
       "\t\t\t}\n",
       "\t\n",
       "\t\t\tvar modifiers = { \n",
       "\t\t\t\tshift: { wanted:false, pressed:false},\n",
       "\t\t\t\tctrl : { wanted:false, pressed:false},\n",
       "\t\t\t\talt  : { wanted:false, pressed:false},\n",
       "\t\t\t\tmeta : { wanted:false, pressed:false}\t//Meta is Mac specific\n",
       "\t\t\t};\n",
       "                        \n",
       "\t\t\tif(e.ctrlKey)\tmodifiers.ctrl.pressed = true;\n",
       "\t\t\tif(e.shiftKey)\tmodifiers.shift.pressed = true;\n",
       "\t\t\tif(e.altKey)\tmodifiers.alt.pressed = true;\n",
       "\t\t\tif(e.metaKey)   modifiers.meta.pressed = true;\n",
       "                        \n",
       "\t\t\tfor(var i=0; k=keys[i],i<keys.length; i++) {\n",
       "\t\t\t\t//Modifiers\n",
       "\t\t\t\tif(k == 'ctrl' || k == 'control') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.ctrl.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'shift') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.shift.wanted = true;\n",
       "\n",
       "\t\t\t\t} else if(k == 'alt') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.alt.wanted = true;\n",
       "\t\t\t\t} else if(k == 'meta') {\n",
       "\t\t\t\t\tkp++;\n",
       "\t\t\t\t\tmodifiers.meta.wanted = true;\n",
       "\t\t\t\t} else if(k.length > 1) { //If it is a special key\n",
       "\t\t\t\t\tif(special_keys[k] == code) kp++;\n",
       "\t\t\t\t\t\n",
       "\t\t\t\t} else if(opt['keycode']) {\n",
       "\t\t\t\t\tif(opt['keycode'] == code) kp++;\n",
       "\n",
       "\t\t\t\t} else { //The special keys did not match\n",
       "\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\telse {\n",
       "\t\t\t\t\t\tif(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase\n",
       "\t\t\t\t\t\t\tcharacter = shift_nums[character]; \n",
       "\t\t\t\t\t\t\tif(character == k) kp++;\n",
       "\t\t\t\t\t\t}\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t\t\n",
       "\t\t\tif(kp == keys.length && \n",
       "\t\t\t\t\t\tmodifiers.ctrl.pressed == modifiers.ctrl.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.shift.pressed == modifiers.shift.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.alt.pressed == modifiers.alt.wanted &&\n",
       "\t\t\t\t\t\tmodifiers.meta.pressed == modifiers.meta.wanted) {\n",
       "\t\t\t\tcallback(e);\n",
       "\t\n",
       "\t\t\t\tif(!opt['propagate']) { //Stop the event\n",
       "\t\t\t\t\t//e.cancelBubble is supported by IE - this will kill the bubbling process.\n",
       "\t\t\t\t\te.cancelBubble = true;\n",
       "\t\t\t\t\te.returnValue = false;\n",
       "\t\n",
       "\t\t\t\t\t//e.stopPropagation works in Firefox.\n",
       "\t\t\t\t\tif (e.stopPropagation) {\n",
       "\t\t\t\t\t\te.stopPropagation();\n",
       "\t\t\t\t\t\te.preventDefault();\n",
       "\t\t\t\t\t}\n",
       "\t\t\t\t\treturn false;\n",
       "\t\t\t\t}\n",
       "\t\t\t}\n",
       "\t\t}\n",
       "\t\tthis.all_shortcuts[shortcut_combination] = {\n",
       "\t\t\t'callback':func, \n",
       "\t\t\t'target':ele, \n",
       "\t\t\t'event': opt['type']\n",
       "\t\t};\n",
       "\t\t//Attach the function with the event\n",
       "\t\tif(ele.addEventListener) ele.addEventListener(opt['type'], func, false);\n",
       "\t\telse if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);\n",
       "\t\telse ele['on'+opt['type']] = func;\n",
       "\t},\n",
       "\n",
       "\t//Remove the shortcut - just specify the shortcut and I will remove the binding\n",
       "\t'remove':function(shortcut_combination) {\n",
       "\t\tshortcut_combination = shortcut_combination.toLowerCase();\n",
       "\t\tvar binding = this.all_shortcuts[shortcut_combination];\n",
       "\t\tdelete(this.all_shortcuts[shortcut_combination])\n",
       "\t\tif(!binding) return;\n",
       "\t\tvar type = binding['event'];\n",
       "\t\tvar ele = binding['target'];\n",
       "\t\tvar callback = binding['callback'];\n",
       "\n",
       "\t\tif(ele.detachEvent) ele.detachEvent('on'+type, callback);\n",
       "\t\telse if(ele.removeEventListener) ele.removeEventListener(type, callback, false);\n",
       "\t\telse ele['on'+type] = false;\n",
       "\t}\n",
       "}\n",
       "\n",
       "shortcut.add(\"Alt+Left\",function() {\n",
       "\tvar event = new Event('click');\n",
       "\tif (settingsShown){\n",
       "\t\tdocument.getElementById('hideSettingsButton_12').dispatchEvent(event);\n",
       "\t} else {\n",
       "\t\tdocument.getElementById('showSettingsButton_12').dispatchEvent(event);\n",
       "\t}\n",
       "});\n",
       "\n",
       "\n",
       "// COMMON_CODE_BLOCK_END\n",
       "\n",
       "});});\n",
       "      </script>\n",
       "   </body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "$c2=recession_cone($p);\n",
    "$c2->VISUAL;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "polymake-4.4",
   "language": "polymake",
   "name": "polymake"
  },
  "language_info": {
   "codemirror_mode": "perl",
   "file_extension": ".pl",
   "mimetype": "text/x-polymake",
   "name": "polymake"
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}