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canvas.html
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<!doctype html>
<!-- paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/ -->
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
<head>
<meta charset="utf-8">
<!-- Use the .htaccess and remove these lines to avoid edge case issues.
More info: h5bp.com/b/378 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title></title>
<meta name="description" content="">
<meta name="author" content="">
<!-- Mobile viewport optimized: j.mp/bplateviewport -->
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Place favicon.ico and apple-touch-icon.png in the root directory: mathiasbynens.be/notes/touch-icons -->
<!-- CSS: implied media="all" -->
<link rel="stylesheet" href="css/style.css">
<!-- More ideas for your <head> here: h5bp.com/docs/#head-Tips -->
<!-- All JavaScript at the bottom, except for Modernizr and Respond.
Modernizr enables HTML5 elements & feature detects; Respond is a polyfill for min/max-width CSS3 Media Queries
For optimal performance, use a custom Modernizr build: www.modernizr.com/download/ -->
<script src="js/libs/modernizr-2.0.min.js"></script>
<script src="js/libs/respond.min.js"></script>
</head>
<body>
<div id="container">
<header>
</header>
<div id="main" role="main">
<canvas id="canvas" width="300" height="300"></canvas>
</div>
<footer>
</footer>
</div> <!--! end of #container -->
<!-- JavaScript at the bottom for fast page loading -->
<!-- Grab Google CDN's jQuery, with a protocol relative URL; fall back to local if offline -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="js/libs/jquery-1.6.2.min.js"><\/script>')</script>
<!-- scripts concatenated and minified via ant build script-->
<script src="js/plugins.js"></script>
<script src="js/script.js"></script>
<!-- end scripts-->
<!-- mathiasbynens.be/notes/async-analytics-snippet Change UA-XXXXX-X to be your site's ID -->
<script>
var _gaq=[['_setAccount','UA-XXXXX-X'],['_trackPageview'],['_trackPageLoadTime']];
(function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];g.async=1;
g.src=('https:'==location.protocol?'//ssl':'//www')+'.google-analytics.com/ga.js';
s.parentNode.insertBefore(g,s)}(document,'script'));
</script>
<!-- Prompt IE 6 users to install Chrome Frame. Remove this if you want to support IE 6.
chromium.org/developers/how-tos/chrome-frame-getting-started -->
<!--[if lt IE 7 ]>
<script src="//ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js"></script>
<script>window.attachEvent('onload',function(){CFInstall.check({mode:'overlay'})})</script>
<![endif]-->
<script type="text/javascript" charset="utf-8">
$(document).ready(function(){
//get a reference to the canvas
//BEGIN LIBRARY CODE
var x = 150;
var y = 150;
var dx = 2;
var dy = 4;
var WIDTH;
var HEIGHT;
var ctx;
init = function() {
ctx = $('#canvas')[0].getContext("2d");
WIDTH = $("#canvas").width();
HEIGHT = $("#canvas").height();
return setInterval(draw, 10);
}
circle = function(x,y,r) {
ctx.beginPath();
ctx.arc(x, y, r, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
}
rect = function(x,y,w,h) {
ctx.beginPath();
ctx.rect(x,y,w,h);
ctx.closePath();
ctx.fill();
}
clear = function() {
ctx.clearRect(0, 0, WIDTH, HEIGHT);
}
//END LIBRARY CODE
draw = function() {
clear();
circle(x, y, 10);
if (x + dx > WIDTH || x + dx < 0)
dx = -dx;
if (y + dy > HEIGHT || y + dy < 0)
dy = -dy;
x += dx;
y += dy;
}
init();
});
</script>
</body>
</html>