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canvasLife-3.html
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canvasLife-3.html
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<!doctype html>
<html lang="de" id="*">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>canvasLife</title>
</head>
<body style="color : #81d742;">
<canvas id="myCanvas" width="400" height="400" style="border : 2px solid #81d742;">Ihr Browser ist veraltet. Bitte installieren Sie eine aktuelle Version des Browsers.</canvas>
<p id="buttonbar">
<input id="probability" name="probability" type="range" min="0" max="100" value="50" step="1" placeholder="Wahrscheinlichkeit für eine Zelle, dass sie in das Feld gelangt (0-100%, Standard: 50&)" onmousemove="rangeProbMove();" title="Wahrscheinlichkeit für eine Zelle, dass sie in das Feld gelangt (0-100%, Standard: 50&)" />
<span id="probabilityCells">50%</span>
<button id="restart" name="restart" onclick="restart();" title="Startet die Simulation neu" value="restart"><img style="vertical-align : middle;" src="data:image/png;base64,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" alt="restart-logo" />Restart</button>
<button id="stop" name="stop" onclick="stop();" title="Stoppt die Simulation" value="stop"><img style="vertical-align : middle;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAABlBMVEUAAAD/PQBxF8WcAAAAAXRSTlMAQObYZgAAABJJREFUeAFjGJqAEQ6Gv8SQBAB3iABlj2apNwAAAABJRU5ErkJggg==" alt="stop-logo" />Stop</button>
<button id="go" name="go" onclick="go();" title="Führt die Simulation weiter aus" value="go"><img style="vertical-align : middle;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAADFBMVEUAAAAgl/MhlvMhlvP7jjceAAAAA3RSTlMAQL9R0SXGAAAAK0lEQVR4AdXOMQEAIAwDQeD9e0bBCUjGv6E9m3sXUKACFahABGQf97vIM/uzFQCXf4mG3wAAAABJRU5ErkJggg==" alt="go-logo" />Go</button></p>
<p id="statistic">
<span id="gridSize">Feldgröße: ---</span><br />
<span id="maxCellPlaces">Zellplätze: ---</span><br />
<span id="probabilityCellsStats">Wahrscheinlichkeit: ---</span><br />
<span id="livingCellsStartState">Lebende Zellen zu Startbeginn: ---</span><br />
<span id="generations">Generationen: ---</span><br />
<span id="livingCells">Lebende Zellen: ---</span><br />
<span id="celluarityGlobal">Zelldichte global: ---</span><br />
<span id="celluarityLiving">Zelldichte lebend: ---</span><br />
</p>
<script>
var gridHeight = window.document.getElementById("myCanvas").height;
var gridWidth = window.document.getElementById("myCanvas").width;
var theGrid = createArray(gridWidth);
var mirrorGrid = createArray(gridWidth);
var drawColor = "#81d742";
var repeater;
var maxCellPlaces = gridWidth * gridHeight;
var generations = 0;
var livingCells = 0;
var livingCellsStartState = 0;
var celluarityGlobal = 0;
var celluarityLiving = 0;
var gridSizeTextContent = "Feldgröße: ";
var maxCellPlacesTextContent = "Zellplätze: ";
var probabilityCellsTextContent = "Wahrscheinlichkeit: ";
var livingCellsStartStateTextContent = "Lebende Zellen zu Startbeginn: ";
var generationsTextContent = "Generationen: ";
var livingCellsTextContent = "Lebende Zellen: ";
var celluarityGlobalTextContent = "Zelldichte global: ";
var celluarityLivingTextContent = "Zelldichte lebend: ";
document.getElementById("gridSize").textContent = gridSizeTextContent + gridWidth + "x" + gridHeight;
document.getElementById("maxCellPlaces").textContent = maxCellPlacesTextContent + maxCellPlaces;
fillRandom(); //create the starting state for the grid by filling it with random cells
tick(); //call main loop
//functions
function RoundFloat(x, n)
{ //round a number to n decimal places
if (n < 1 || n > 14) return false;
var e = Math.pow(10, n);
var k = (Math.round(x * e) / e).toString();
if (k.indexOf(".") == -1) k += ".";
k += e.toString().substring(1);
return k.substring(0, k.indexOf(".") + n + 1);
}
function rangeProbMove()
{ //
document.getElementById("probabilityCells").textContent = document.getElementById('probability').value + '%';
}
function restart()
{ //stop the animation, refill the grid und start the animation again
generations = 0;
livingCells = 0;
livingCellsStartState = 0;
stop();
fillRandom();
tick();
}
function stop()
{ //stop the animation
cancelAnimationFrame(repeater);
}
function go()
{ //Start the stopped animation
stop(); //it stops the actual animation event, otherwise it stacks the animation events
tick();
}
function tick()
{ //main loop
drawGrid();
updateGrid();
repeater = requestAnimationFrame(tick);
}
function createArray(rows)
{ //creates a 2 dimensional array of required height
var arr = [];
for (var i = 0; i < rows; i++)
{
arr[i] = [];
}
return arr;
}
function fillRandom()
{ //fill the grid randomly
var max = document.getElementById("probability").getAttribute("max");
var value = document.getElementById("probability").value;
var arr = new Array(max);
for (var i = 0; i < max; i++)
{
if (i < value) arr[i] = 1;
}
livingCellsStartState = 0;
for (var j = 0; j < gridHeight; j++)
{ //iterate through rows
for (var k = 0; k < gridWidth; k++)
{ //iterate through columns
var rawRandom = Math.random(); //get a raw random number
var improvedNum = (rawRandom * max); //*2 convert it to an int
var randomBinary = Math.floor(improvedNum);
if (arr[randomBinary] === 1)
{
theGrid[j][k] = 1;
livingCellsStartState++;
} else {
theGrid[j][k] = 0;
}
}
}
document.getElementById("livingCellsStartState").textContent = livingCellsStartStateTextContent + livingCellsStartState;
document.getElementById("probabilityCellsStats").textContent = probabilityCellsTextContent + value + "%";
}
function drawGrid()
{ //draw the contents of the grid onto a canvas
livingCells = 0;
var c = document.getElementById("myCanvas");
if (c.getContext)
{
var ctx = c.getContext("2d");
ctx.clearRect(0, 0, c.width, c.height); //this should clear the canvas ahead of each redraw
for (var j = 1; j < gridHeight; j++)
{ //iterate through rows
for (var k = 1; k < gridWidth; k++)
{ //iterate through columns
if (theGrid[j][k] === 1)
{
livingCells++;
//ctx.fillStyle = document.getElementById("*").style.lightingColor;
ctx.fillStyle = drawColor;
ctx.fillRect(j, k, 1, 1);
/*
celluarityGlobal = (livingCells / maxCellPlaces) * 100;
celluarityLiving = (livingCells / livingCellsStartState) * 100;
document.getElementById("generations").textContent = generationsTextContent + generations;
document.getElementById("livingCells").textContent = livingCellsTextContent + livingCells;
document.getElementById("celluarityGlobal").textContent = celluarityGlobalTextContent + RoundFloat(celluarityGlobal,3) + "%";
document.getElementById("celluarityLiving").textContent = celluarityLivingTextContent + RoundFloat(celluarityLiving,3) + "%";
*/
}
}
/*
celluarityGlobal = (livingCells / maxCellPlaces) * 100;
celluarityLiving = (livingCells / livingCellsStartState) * 100;
document.getElementById("generations").textContent = generationsTextContent + generations;
document.getElementById("livingCells").textContent = livingCellsTextContent + livingCells;
document.getElementById("celluarityGlobal").textContent = celluarityGlobalTextContent + RoundFloat(celluarityGlobal,3) + "%";
document.getElementById("celluarityLiving").textContent = celluarityLivingTextContent + RoundFloat(celluarityLiving,3) + "%";
*/
}
celluarityGlobal = (livingCells / maxCellPlaces) * 100;
celluarityLiving = (livingCells / livingCellsStartState) * 100;
document.getElementById("generations").textContent = generationsTextContent + generations;
document.getElementById("livingCells").textContent = livingCellsTextContent + livingCells;
document.getElementById("celluarityGlobal").textContent = celluarityGlobalTextContent + RoundFloat(celluarityGlobal,3) + "%";
document.getElementById("celluarityLiving").textContent = celluarityLivingTextContent + RoundFloat(celluarityLiving,3) + "%";
}
}
function updateGrid()
{ //perform one iteration of grid update
generations++;
for (var j = 1; j < gridHeight - 1; j++)
{ //iterate through rows
for (var k = 1; k < gridWidth - 1; k++)
{ //iterate through columns
var totalCells = 0;
//add up the total values for the surrounding cells
totalCells += theGrid[j - 1][k - 1]; //top left
totalCells += theGrid[j - 1][k]; //top center
totalCells += theGrid[j - 1][k + 1]; //top right
totalCells += theGrid[j][k - 1]; //middle left
totalCells += theGrid[j][k + 1]; //middle right
totalCells += theGrid[j + 1][k - 1]; //bottom left
totalCells += theGrid[j + 1][k]; //bottom center
totalCells += theGrid[j + 1][k + 1]; //bottom right
//apply the rules to each cell
if (theGrid[j][k] === 0)
{
switch (totalCells)
{
case 3:
mirrorGrid[j][k] = 1; //if cell is dead and has 3 neighbours, switch it on
break;
default:
mirrorGrid[j][k] = 0; //otherwise leave it dead
}
} else if (theGrid[j][k] === 1) { //apply rules to living cell
switch (totalCells)
{
case 0:
case 1:
mirrorGrid[j][k] = 0; //die of lonelines
break;
case 2:
case 3:
mirrorGrid[j][k] = 1; //carry on living
break;
case 4:
case 5:
case 6:
case 7:
case 8:
mirrorGrid[j][k] = 0; //die of overcrowding
break;
default:
mirrorGrid[j][k] = 0;
}
}
}
}
for (var j = 0; j < gridHeight; j++)
{ //iterate through rows
for (var k = 0; k < gridWidth; k++)
{ //iterate through columns
theGrid[j][k] = mirrorGrid[j][k];
}
}
}
</script>
</body>
</html>