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plasma.html
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<!DOCTYPE HTML>
<html lang="en">
<head>
<title>Plasma Example</title>
<meta charset="utf-8">
<link rel="stylesheet" href="css/global.css" type="text/css" />
<script type="text/javascript" src="js/Point.js"></script>
<script type="text/javascript" src="js/Rectangle.js"></script>
<script type="text/javascript" src="js/Matrix.js"></script>
<script type="text/javascript" src="js/BitmapData.js"></script>
<script>
function init(){
canvas = document.getElementById("canvas");
context = canvas.getContext("2d");
bmd = canvas.bitmapData;
function dist(a, b, c, d) {
return Math.sqrt(((a - c) * (a - c) + (b - d) * (b - d)));
}
setInterval(function(){
time = new Date().getTime()/50;
for(y=0; y<bmd.height; y++) {
for(x=0; x<bmd.width; x++) {
rgb = Math.sin(dist(x+time, y, 128.0, 128.0) / 8.0)
+ Math.sin(dist(x, y, 64.0, 64.0) / 8.0)
+ Math.sin(dist(x, y+time/7, 192.0, 64) / 7.0)
+ Math.sin(dist(x, y, 192.0, 100.0) / 8.0);
c = parseInt(4+rgb)*32;
bmd.setPixel(x, y, c<<16 | (c*2)<<8 | 255-c);
}
}
context.putImageData(bmd.data, 0, 0);
}, 10);
};
</script>
</head>
<body onload="init();">
<div id="container">
<div id="example-container">
<div id="example">
<canvas id="canvas" width="300" height="150"></canvas><br>
</div>
<div id="code">
<pre>canvas = document.getElementById("canvas");
context = canvas.getContext("2d");
bmd = canvas.bitmapData;
function dist(a, b, c, d) {
return Math.sqrt(((a - c) * (a - c) + (b - d) * (b - d)));
}
setInterval(function(){
time = new Date().getTime()/50;
for(y=0; y<bmd.height; y++) {
for(x=0; x<bmd.width; x++) {
rgb = Math.sin(dist(x+time, y, 128.0, 128.0) / 8.0)
+ Math.sin(dist(x, y, 64.0, 64.0) / 8.0)
+ Math.sin(dist(x, y+time/7, 192.0, 64) / 7.0)
+ Math.sin(dist(x, y, 192.0, 100.0) / 8.0);
c = parseInt(4+rgb)*32;
bmd.setPixel(x, y, c<<16 | (c*2)<<8 | 255-c);
}
}
context.putImageData(bmd.data, 0, 0);
}, 10);</pre>
</div>
</div>
<div class="break"><img src="res/break.gif"></div>
<div id="links">
<ul>
<li><a href="index.html">back</a></li>
</ul>
</div>
</div>
</body>
</html>