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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
<title>Connect The Dots Generator</title>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"
integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
crossorigin="anonymous"></script>
<style>
textarea { width: 100%; }
.active-stroke { stroke: red; }
.white-stroke { stroke: white; }
svg { max-height: 100vh; }
.hide-drawing svg * { display: none; }
svg .temp { display: block !important; }
</style>
</head>
<body onload="draw()">
<div class="container-fluid" style="margin:0px; padding:0px">
<div class="panel" style="background-color: rgba(0, 0, 0, 0.1);">
<div class="panel-heading" style="background-color:#fff; color:#666; height: 50px; border-radius: 0 !important;">
<h2 align="center" style="padding:0px; margin:0px;">
Connect The Dots Generator
<span class="pull-right panel-collapse-clickable" data-toggle="collapse" data-parent="#accordion" href="#filterPanel">
<i class="glyphicon glyphicon-chevron-up"></i>
</span>
</h2>
</div>
<div id="filterPanel" class="panel-collapse panel-collapse collapse in">
<div class="panel-body">
<div class="row">
<div class="col-md-6">
<b>Instructions</b>: Upload an SVG image. The first Path object in the SVG will be used to create a connect-the-dots game. Use the options to automatically set the number of dots, dot sizes, and other features. You can also manually drag points and text for fine tuning. Toggle the Path line off using the Toggle Path button when you are done.
<hr>
<div id="userActions">
<input type="file" id="fileUpload" type="button" class="btn btn-block" style="background-color:#fff">
</div>
<br>
<!--- Added path number selector here -->
<label for="paths">Choose Path:</label>
<select id = "pathNumber" style = "width: 100%;padding: 3px;" onchange = "changePath()" name = "paths"></select>
<br>
<br>
<button type="button" class="btn btn-block" onclick="togglePathColor()" style="background-color:#fff">Toggle Path</button>
<br>
<button type="button" class="btn btn-block" onclick="toggleBackgroundVisibility()" style="background-color:#fff">Toggle Background Visibility</button>
<br>
<button type="button" class="btn btn-block" onclick="toggleLines()" style="background-color:#fff">Toggle Lines</button>
<br>
<label for="labeller">Function to generate dots indices:</label>
<textarea id="labeller" onchange="draw()">(pathIndex, i) => ((pathIndex ? String.fromCharCode(64 + pathIndex) : '') + (i + 1))</textarea>
<br><br>
</div>
<div class="col-md-6">
Number of points: <span id="numSamplesValue"></span>
<input type="range" min="1" max="300" value="50" id="numSamples" onchange="draw()">
<br>
Point size: <span id="radiusValue"></span>
<input type="range" min="1" max="50" value="5" id="radius" onchange="draw()">
<br>
Text font size: <span id="fontSizeValue"></span>
<input type="range" min="0" max="50" value="10" id="fontSize" onchange="draw()">
<br>
Text offset X: <span id="offsetXValue"></span>
<input type="range" min="-50" max="50" value="10" id="offsetX" onchange="draw()">
<br>
Text offset Y: <span id="offsetYValue"></span>
<input type="range" min="-50" max="50" value="-8" id="offsetY" onchange="draw()">
<br>
Filter out points forming an angle above : <span id="pointAlphaValue"></span>
<input type="range" min="1" max="100" value="20" id="pointAlpha" onchange="draw()">
<br>
<label for="customPointFilter">Alternate custom function to filter points:</label>
<textarea id="customPointFilter" onchange="draw()" placeholder="points => points.slice(0, 50)"></textarea>
</div>
</div>
</div>
</div>
</div>
</div>
<div id='container' align="center">
<!-- Default SVG Image-->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="500px" height="500px" viewBox="0 0 500 500" enable-background="new 0 0 500 500" xml:space="preserve">
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// Helper functions
function angle(p1, p2) {
var angle = Math.atan2(p2.y - p1.y, p2.x - p1.x);
while (angle < 0) {
angle += 2 * Math.PI;
}
return angle;
}
function angle3(p1, p2, p3) {
return Math.abs(angle(p1, p2) - angle(p3, p2));
}
function deg(rad) {
return rad * 180 / Math.PI;
}
var paths = Array.from(document.getElementsByTagName('path'));
var pathSelector = document.getElementById('pathNumber');
var selectedPaths = [paths[0]];
var previousStrokeColor;
//ADDED CHANGE PATH FUNCTION
function changePath() { //every time the select element changes, changePath is invoked
selectedPaths.forEach((path) => path.classList.remove('active-stroke')); // set the currently selected path stroke back to its original color
if (pathSelector.value === 'ALL') {
selectedPaths = paths;
} else {
selectedPaths = [paths[pathSelector.selectedIndex]];
}
selectedPaths.forEach((path) => path.classList.add('active-stroke')); // add the class 'active-stroke' to the new selected path
draw();
}
// this function adds the path options to the path selector
function addPathOptions() {
for(let i = 0; i < paths.length; i++) {
var pathOption = document.createElement('option');
pathOption.value = paths[i];
pathOption.text = `Path ${i}`;
pathSelector.appendChild(pathOption);
}
var pathOption = document.createElement('option');
pathOption.value = 'ALL';
pathOption.text = 'All Paths';
pathSelector.appendChild(pathOption);
}
addPathOptions() // call this function to populate the path selector
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// parse user input
var labellerFunc = eval(document.getElementById("labeller").value);
var samples = parseInt(document.getElementById("numSamples").value);
document.getElementById("numSamplesValue").textContent = samples;
var pointAlpha = parseInt(document.getElementById("pointAlpha").value);
document.getElementById("pointAlphaValue").textContent = pointAlpha;
var radius = parseInt(document.getElementById("radius").value);
document.getElementById("radiusValue").textContent = radius;
var fontSize = parseInt(document.getElementById("fontSize").value);
document.getElementById("fontSizeValue").textContent = fontSize;
var offsetX = parseInt(document.getElementById("offsetX").value);
document.getElementById("offsetXValue").textContent = offsetX;
var offsetY = parseInt(document.getElementById("offsetY").value);
document.getElementById("offsetYValue").textContent = offsetY;
var pointsPerPathIndex = pointsFromPath(selectedPaths, samples); // Structure: pathIndex -> [ pointIndex -> [ x, y ] ]
selectedPaths.forEach((path) => path.classList.add('active-stroke'));
// Delete all circles and text upon redraw
var paras = document.getElementsByClassName('temp');
while(paras[0]) {
paras[0].parentNode.removeChild(paras[0]);
}
// Draw points as circles
pointsPerPathIndex.forEach((points, pathIndex) => {
for (i = 0; i < points.length-1; i++) {
var point = document.createElementNS("http://www.w3.org/2000/svg", 'circle');
point.setAttribute("cx", points[i][0]);
point.setAttribute("cy", points[i][1]);
point.setAttribute("r", radius);
point.setAttribute("fill", "black");
point.setAttribute("class", "draggable temp");
point.setAttribute("transform", "matrix(1 0 0 1 0 0)");
point.setAttribute("onmousedown", "selectElement(evt)");
svg.appendChild(point);
var label = document.createElementNS("http://www.w3.org/2000/svg", 'text');
label.setAttribute("x", points[i][0]+offsetX);
label.setAttribute("y", points[i][1]+offsetY);
label.setAttribute("fill", "black");
label.setAttribute("text-anchor", "middle");
label.setAttribute("font-size", fontSize);
label.textContent = labellerFunc(pathIndex, i);
label.setAttribute("class", "draggable temp");
label.setAttribute("transform", "matrix(1 0 0 1 0 0)");
label.setAttribute("onmousedown", "selectElement(evt)");
svg.appendChild(label);
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}
// Create points from path
function pointsFromPath(selectedPaths, samples) {
var customPointFilterFunc = eval(document.getElementById("customPointFilter").value);
return selectedPaths.map((path) => {
var points = [];
var len = path.getTotalLength();
var step = len/samples;
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var p = path.getPointAtLength(i);
points.push(p);
}
for (var k = 0; k < 5; k++) {
points = customPointFilterFunc ? customPointFilterFunc(points) : filterPointsOnAngle(points);
}
var pathPoints = [];
for (var i = 0; i < points.length; i++) {
pathPoints.push([points[i].x, points[i].y]);
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return pathPoints;
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function filterPointsOnAngle(points) {
var pointAlpha = parseInt(document.getElementById("pointAlpha").value);
var excludedPoints = [];
for (var i = 0; i < points.length - 2; i += 1) {
if (Math.abs(180 - deg(angle3(points[i], points[i + 1], points[i + 2]))) < pointAlpha) {
excludedPoints.push(i + 1);
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}
return points.filter((_, i) => !excludedPoints.includes(i));
}
function togglePathColor() {
var x = document.getElementById('container').getElementsByTagName('path')[pathSelector.selectedIndex];
if (x.classList.contains('active-stroke')) {
x.classList.remove('active-stroke');
x.classList.add('white-stroke');
} else {
x.classList.remove('white-stroke');
x.classList.add('active-stroke');
}
}
function toggleBackgroundVisibility() {
var containerClassList = document.getElementById('container').classList;
if (containerClassList.contains('hide-drawing')) {
containerClassList.remove('hide-drawing');
} else {
containerClassList.add('hide-drawing');
}
}
function toggleLines() {
var pointSize = parseInt(document.getElementById("radius").value);
var samples = parseInt(document.getElementById("numSamples").value);
var svg = document.getElementById('container').getElementsByTagName('svg')[0]; // assumes only 1 svg element
var pointsPerPathIndex = pointsFromPath(selectedPaths, samples);
var lines = Array.from(Array.from(document.getElementsByTagName('line')));
if (lines.length) {
lines.forEach((line) => line.remove())
} else {
pointsPerPathIndex.forEach(points => {
var prevPoint = null;
points.forEach(point => {
if (prevPoint) {
var line = document.createElementNS("http://www.w3.org/2000/svg", 'line');
line.setAttribute("x1", prevPoint[0]);
line.setAttribute("y1", prevPoint[1]);
line.setAttribute("x2", point[0]);
line.setAttribute("y2", point[1]);
line.setAttribute("stroke", "black");
line.setAttribute("stroke-width", pointSize / 2);
line.setAttribute("class", "temp");
line.setAttribute("transform", "matrix(1 0 0 1 0 0)");
svg.appendChild(line);
}
prevPoint = point;
});
});
}
}
// Allow points to be moved manually
// Thanks to Peter: http://www.petercollingridge.co.uk/interactive-svg-components/draggable-svg-element
var selectedElement = 0;
var currentX = 0;
var currentY = 0;
var currentMatrix = 0;
function selectElement(evt) {
selectedElement = evt.target;
currentX = evt.clientX;
currentY = evt.clientY;
currentMatrix = selectedElement.getAttributeNS(null, "transform").slice(7,-1).split(' ');
for(var i=0; i<currentMatrix.length; i++) {
currentMatrix[i] = parseFloat(currentMatrix[i]);
}
selectedElement.setAttributeNS(null, "onmousemove", "moveElement(evt)");
selectedElement.setAttributeNS(null, "onmouseup", "deselectElement(evt)");
selectedElement.setAttributeNS(null, "onmouseout", "deselectElement(evt)");
}
function moveElement(evt){
dx = evt.clientX - currentX;
dy = evt.clientY - currentY;
currentMatrix[4] += dx;
currentMatrix[5] += dy;
newMatrix = "matrix(" + currentMatrix.join(' ') + ")";
selectedElement.setAttributeNS(null, "transform", newMatrix);
currentX = evt.clientX;
currentY = evt.clientY;
}
function deselectElement(evt){
if(selectedElement != 0){
selectedElement.removeAttributeNS(null, "onmousemove");
selectedElement.setAttributeNS(null, "onmouseout", "deselectElement(evt)");
selectedElement.setAttributeNS(null, "onmouseup", "deselectElement(evt)");
selectedElement = 0;
}
}
// https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding
function b64DecodeUnicode(str) {
// Going backwards: from bytestream, to percent-encoding, to original string.
return decodeURIComponent(atob(str).split('').map(function(c) {
return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
}).join(''));
}
function removeOptions(selectElement) {
for (var i = selectElement.length - 1; i >= 0; i--) {
selectElement.remove(i);
}
}
function setImage(imageSrc) {
imageSrc = imageSrc.replace('data:image/svg+xml;base64,', '');
imageSrc = b64DecodeUnicode(imageSrc);
document.getElementById("container").innerHTML = imageSrc;
removeOptions(pathSelector); //REMOVE THE OPTIONS FROM THE PREVIOUS SVG IMAGE
paths = Array.from(document.getElementsByTagName('path')); // resetting the paths and path variable
selectedPaths = [paths[0]]; // redefines path as the first path of the new
addPathOptions(); //add new path options from new SVG (ImageSrc)
draw();
}
// File upload
/* modified from https://codepen.io/doughensel/pen/zGMmop */
function runUpload( file ) {
// http://stackoverflow.com/questions/12570834/how-to-preview-image-get-file-size-image-height-and-width-before-upload
if( file.type === 'image/svg+xml' ){
var reader = new FileReader(), image = new Image();
reader.readAsDataURL( file );
console.log('reading image...');
reader.onload = function( _file ){
console.log('setting image...');
setImage(_file.target.result);
} // END reader.onload()
} // END test if file.type === image
}
if( window.FileReader ){
//Bind the input[type="file"] to the function runUpload()
$('#fileUpload').on('change', function(){ runUpload( this.files[0] ); });
}else{
// Report error message if FileReader is unavilable
var p = document.createElement( 'p' ),
msg = document.createTextNode( 'Sorry, your browser does not support FileReader.' );
p.className = 'error';
p.appendChild( msg );
$('#userActions').el.innerHTML = '';
$('#userActions').el.appendChild( p );
}
</script>
<!-- for collapsible panel -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script>
$(".panel-collapse").on("hide.bs.collapse", function () {
$(".panel-collapse-clickable").find('i').removeClass("glyphicon-chevron-up").addClass("glyphicon-chevron-down");
});
$(".panel-collapse").on("show.bs.collapse", function () {
$(".panel-collapse-clickable").find('i').removeClass("glyphicon-chevron-down").addClass("glyphicon-chevron-up");
});
</script>
</html>