/** * X-Team Fireworks  * @author Andrew Valums * * Copyright (c) 2009 X-Team, http://x-team.com */if(!Xteam)var Xteam={}; Xteam.fireworkShow=function(a,c){function e(){a=j(a).eq(0);a.css("position")=="static"&&a.css("position","relative");h=j("<canvas></canvas>");if(!h[0].getContext)return false;h.attr({height:a.height(),width:a.width()}).css({position:"absolute",display:"block",top:0,left:0,zIndex:99999}).appendTo(a);n=Xteam.Canvas.scene(h[0]);l=setInterval(function(){Math.random()>0.75||Xteam.firework(n)},1.5*c);k=true}var d={},j=jQuery,l,n,h,k=false;c=c||900;e();d.remove=function(){if(k){clearInterval(l);n.destroy(); n=null;h.remove();a=h=null}};return d};Xteam||(Xteam={}); Xteam.firework=function(a){function c(){k=360*Math.random();f=Xteam.Color.hslToRgb([k,Math.random(),0.2+0.8*Math.random()]);i=(a.getCanvas().width-h*2)*Math.random()+h;m=(a.getCanvas().height/2-h)*Math.random()+h;o=a.getCanvas().height;a.register(j)}function e(){if(o>m){o-=10;l.fillStyle="rgb("+f[0]+","+f[1]+","+f[2]+")";l.beginPath();l.arc(Math.round(i),Math.round(o),2,0,2*Math.PI,true);l.fill()}else{a.remove(j);d()}}function d(){for(var p=40+Math.floor(50*Math.random());p--;){var q=Xteam.Color.hslToRgb([k, Math.random(),0.2+0.8*Math.random()]);new n(a,q,i,m,10)}}var j={draw:e},l=a.getContext(),n=Xteam.FireworkParticle,h=70,k,i,m,o,f;c();return j};Xteam.FireworkParticle=function(a,c,e,d){this.scene=a;this.color=c;this.x=Math.round(e);this.y=Math.round(d);this.rotate=2*Math.PI*Math.random();this.opacity=100;this.f=0;this.max=40+10*Math.random();this.size=0;this.speed=4*Math.random();a.register(this)}; Xteam.FireworkParticle.prototype={getStyle:function(){return"rgba("+this.color[0]+","+this.color[1]+","+this.color[2]+","+this.opacity/100+")"},draw:function(a,c){if(this.f<this.max){this.f++;this.size+=this.speed;this.speed*=0.95;if(this.f>0.8*this.max)this.opacity-=6;c.lineWidth=1;c.save();c.translate(this.x,this.y);c.rotate(this.rotate);c.strokeStyle=this.getStyle();c.beginPath();c.moveTo(Math.round(0.85*this.size),0);c.lineTo(Math.round(this.size),0);c.stroke();c.restore()}else this.scene.remove(this)}}; Xteam||(Xteam={});if(!Xteam.Canvas)Xteam.Canvas={}; Xteam.Canvas.scene=function(a){function c(f){i.push(f)}function e(){for(var f=m.length;f--;)i[m[f]]=null;m=[];for(f=i.length;f--;)i[f]||i.splice(m[f],1)}function d(f){for(var p=i.length;p--;)if(f===i[p]){m.push(p);break}}function j(){clearInterval(o)}function l(){return k}function n(){return a}var h={register:c,remove:d,getContext:l,getCanvas:n,destroy:j},k=a.getContext("2d"),i=[],m=[],o=setInterval(function(){k.clearRect(0,0,a.width,a.height);for(var f=i.length;f--;)typeof i[f].draw=="function"&& i[f].draw(h,k);e()},30);return h};Xteam||(Xteam={});if(!Xteam.Color)Xteam.Color={};Xteam.Color.hslToRgb=function(a){var c=a[0],e=a[1];a=a[2];if(e==0)r=g=b=a;e=a<0.5?a*(1+e):a+e-a*e;a=2*a-e;c/=360;var d=[];d[0]=c+1/3;d[1]=c;d[2]=c-1/3;for(c=3;c--;){d[c]%=1;d[c]=d[c]<1/6?a+(e-a)*6*d[c]:d[c]<0.5?e:d[c]<2/3?a+(e-a)*6*(2/3-d[c]):a;d[c]*=255;d[c]=Math.floor(d[c]);if(d[c]<0)d[c]=0}return d}; Xteam.Color.hslToRgb.test=function(){function a(e,d){for(var j=e.lenght;j--;)if(e[j]!==d[j])throw Error("Got "+e+", expected "+d);console.log("success")}var c=Xteam.Color.hslToRgb;a(c([0,1,1]),[1,0,0]);a(c([120,0.5,1]),[0.5,1,0.5]);a(c([240,1,0.5]),[0,0,0.5]);c([104.15549071384422,0.9040453462245244,0.2855993456480115])};