(function(window,$,undefined){var ctx=null;var W=300,H=300;var NUM_WAVES=7;var BLUR_RADIUS=30;var THETA_RESOLUTION=0.05;var cx=W/2,cy=H/2;var r0=1.1;var waves=[];var t=new Date()|0;window.requestAnimationFrame=(function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(callback,element){window.setTimeout(callback,1000/60);};})();function Wave(){this.maxAlpha=Math.random()/20;this.alpha=0;this.omega=Math.floor(Math.random()*10);this.phi=Math.random()*2*Math.PI;this.deltaPhi=(0.5- Math.random())/50;this.life=0;this.lifeTime=1000+ Math.random()*1000;}
function generateWaves(){for(var i=0;i<NUM_WAVES;++i){waves[i]=new Wave();}}
function transformDistance(r){return 100*r;}
function polarFunction(theta){var r=r0;for(var i=0;i<NUM_WAVES;++i){var wave=waves[i];r+=wave.alpha*Math.sin(wave.omega*theta+ wave.phi);}
return r;}
function integrate(dt){for(var i=0;i<NUM_WAVES;++i){var wave=waves[i];waves[i].phi+=dt*wave.deltaPhi;waves[i].alpha=wave.maxAlpha*Math.sin(Math.PI*wave.life/wave.lifeTime);waves[i].life+=dt;if(wave.life>wave.lifeTime){waves[i]=new Wave();}}}
function drawFrame(){ctx.clearRect(0,0,W,H);ctx.beginPath();for(var theta=0;theta<2*Math.PI;theta+=THETA_RESOLUTION){var r=transformDistance(polarFunction(theta));ctx.lineTo(cx+ r*Math.cos(theta),cy+ r*Math.sin(theta));}
ctx.fill();}
function mainLoop(){var dt=(new Date()|0)- t;t=new Date()|0;integrate(dt);drawFrame();requestAnimationFrame(mainLoop);}
function initFlashFallback(){var flash='<object type="application/x-shockwave-flash" ';flash+='           data="http://graphism.fr/header.swf" ';flash+='           width="510" ';flash+='           height="295"> ';flash+='           <param name="movie" value="http://graphism.fr/header.swf" /> ';flash+='           <param name="quality" value="high" /> ';flash+='           <param name="allowScriptAccess" value="always"> ';flash+='           <param name="wmode" value="transparent" /> ';flash+='   </object> ';$("#flash").html(flash);}
$(function initCanvas(){if(Modernizr.canvas){ctx=document.getElementById('logo').getContext('2d');ctx.shadowColor='black';ctx.shadowOffsetX=0;ctx.shadowOffsetY=0;ctx.shadowBlur=BLUR_RADIUS;ctx.fillStyle='rgba(0, 0, 0, 1)';generateWaves();mainLoop();}else{initFlashFallback();}});})(window,jQuery);