セルオートマトンの自己増殖（HTML5, JavaScript, CSS3） : デモ
セルオートマトンの自己増殖（HTML5, JavaScript, CSS3） : ZIPファイル（4kb）
フラクタル幾何学、セルオートマトンによる自己増殖。
1.HTML
<!DOCTYPE html>
<html lang="jp">
<head>
<meta charset="UTF-8" />
<title>Sierpinski Gasket</title>
<link href="css/base.css" rel="stylesheet" type="text/css">
<script src="js/base.js"></script>
</head>
<body>
<div id="contents">
<canvas id="canvas" width="300" height="300">
</canvas>
</div>
</body>
</html>
2.CSS
@charset "utf-8";
body
{
margin:0;
padding:0;
background-color: #fff;
font-family:Helvetica, HiraKakuProN-W3, sans-serif;
font-size:25px;
color:#fff;
}
#contents
{
position: absolute;
top: 0;
left: 0;
width: 300px;
height:300px;
border: 1px solid #000;
overflow:hidden;
}
#canvas
{
position: absolute;
top: 0;
left: 0;
width: 300px;
height:300px;
}
3.JavaScript
base.js
window.addEventListener("load", init, false);
function init()
{
var theCanvas = document.getElementById("canvas");
var centerX = (theCanvas.currentStyle || document.defaultView.getComputedStyle(theCanvas,'')).width;
centerX = Number(centerX.replace('px',''));
centerX = centerX / 2;
var centerY = (theCanvas.currentStyle || document.defaultView.getComputedStyle(theCanvas,'')).height;
centerY = Number(centerY.replace('px',''));
centerY = centerY / 2;
var ctx = theCanvas.getContext("2d");
var w = 7;
var h = 7;
var sx = 0;
var sy = 0;
ar = new Array();
var n = 31;
var o = 3;
centerX = centerX - (n * w / 2);
centerY = centerY - (n * h / 2);
var amari = 0;
for (var i = 1; i <= n*n; i++)
{
if (i==16)
{
amari=0;
var c = '#000000';
a = 1;
}
else
if (i>=1&&i<33)
{
amari=0;
c = '#ffffff';
a = 0;
}
else
if ((i) % n == 1)
{
amari=1;
var a = (ar[(i + 1 - 1 - n)]) % o;
if (a == 0)
{
c = '#ffffff';
}
else
if (a == 1)
{
c = '#000000';
}
else
if (a == 2)
{
c = '#cc0000';
}
}
else
if ((i) % n == 0)
{
amari=0;
a = (ar[(i - 1 - 1 - n)]) % o;
if (a == 0)
{
c = '#ffffff';
}
else
if (a == 1)
{
c = '#000000';
}
else
if (a == 2)
{
c = '#cc0000';
}
}
else
if (i>33)
{
amari=0;
a = (ar[(i - 1 -1 - n)] + ar[(i + 1 - 1 - n)]) % o;
//a = (ar[(i - 1 -1 - n)] + ar[(i - 1 - n)] + ar[(i + 1 - 1 - n)]) % o;
//a = (ar[(i - 1 -1 - n)] + 2*(ar[(i - 1 - n)])+ar[(i + 1 - 1 - n)]) % o;
if (a == 0)
{
c = '#ffffff';
}
else
if (a == 1)
{
c = '#000000';
}
else
if (a == 2)
{
c = '#cc0000';
}
}
else
{
amari=0;
c = '#ffffff';
a = 0;
}
drawRectangle(ctx, w, h, sx, sy, c, a);
sx += w;
if (i % n == 0)
{
sx = 0;
sy += h;
}
}
ctx.strokeStyle = '#000000';
ctx.beginPath();
ctx.moveTo(centerX, centerY);
ctx.lineTo(centerX, centerY + h*31);
ctx.stroke();
ctx.closePath();
function drawRectangle(ctx, w, h, sx, sy, c, a, amari)
{
ar.push(a);
ctx.lineWidth = 1;
ctx.strokeStyle = '#000000';
ctx.fillStyle = c;
ctx.beginPath();
ctx.moveTo(centerX + sx, centerY + sy);
ctx.lineTo(centerX + sx+w, centerY + sy);
ctx.lineTo(centerX + sx+w, centerY + sy + h);
ctx.lineTo(centerX + sx, centerY + sy + h);
ctx.fill();
ctx.stroke();
ctx.closePath();
}
}