snowfall.min.jquery.js

(function(b){b.snowfall=function(c,d){function u(a,f,g,h,j){this.id=j;this.x=a;this.y=f;this.size=g;this.speed=h;this.step=0;this.stepSize=e(1,10)/100;d.collection&&(this.target=m[e(0,m.length-1)]);a=b(document.createElement("div")).attr({"class":"snowfall-flakes",id:"flake-"+this.id}).css({width:this.size,height:this.size,background:d.flakeColor,position:"absolute",top:this.y,left:this.x,fontSize:0,zIndex:d.flakeIndex});b(c).get(0).tagName===b(document).get(0).tagName?(b("body").append(a),c=b("body")):
b(c).append(a);this.element=document.getElementById("flake-"+this.id);this.update=function(){this.y+=this.speed;this.y>n-(this.size+6)&&this.reset();this.element.style.top=this.y+"px";this.element.style.left=this.x+"px";this.step+=this.stepSize;this.x=!1===p?this.x+Math.cos(this.step):this.x+(p+Math.cos(this.step));if(d.collection&&this.x>this.target.x&&this.x<this.target.width+this.target.x&&this.y>this.target.y&&this.y<this.target.height+this.target.y){var b=this.target.element.getContext("2d"),
a=this.x-this.target.x,c=this.y-this.target.y,e=this.target.colData;if(void 0!==e[parseInt(a)][parseInt(c+this.speed+this.size)]||c+this.speed+this.size>this.target.height)if(c+this.speed+this.size>this.target.height){for(;c+this.speed+this.size>this.target.height&&0<this.speed;)this.speed*=0.5;b.fillStyle="#fff";void 0==e[parseInt(a)][parseInt(c+this.speed+this.size)]?(e[parseInt(a)][parseInt(c+this.speed+this.size)]=1,b.fillRect(a,c+this.speed+this.size,this.size,this.size)):(e[parseInt(a)][parseInt(c+
this.speed)]=1,b.fillRect(a,c+this.speed,this.size,this.size));this.reset()}else this.speed=1,this.stepSize=0,parseInt(a)+1<this.target.width&&void 0==e[parseInt(a)+1][parseInt(c)+1]?this.x++:0<parseInt(a)-1&&void 0==e[parseInt(a)-1][parseInt(c)+1]?this.x--:(b.fillStyle="#fff",b.fillRect(a,c,this.size,this.size),e[parseInt(a)][parseInt(c)]=1,this.reset())}(this.x>l-i||this.x<i)&&this.reset()};this.reset=function(){this.y=0;this.x=e(i,l-i);this.stepSize=e(1,10)/100;this.size=e(100*d.minSize,100*d.maxSize)/
100;this.speed=e(d.minSpeed,d.maxSpeed)}}function r(){for(a=0;a<j.length;a+=1)j[a].update();s=setTimeout(function(){r()},30)}var d=b.extend({flakeCount:35,flakeColor:"#ffffff",flakeIndex:999999,minSize:1,maxSize:2,minSpeed:1,maxSpeed:5,round:!1,shadow:!1,collection:!1,collectionHeight:40,deviceorientation:!1},d),e=function(a,b){return Math.round(a+Math.random()*(b-a))};b(c).data("snowfall",this);var j=[],f=0,a=0,n=b(c).height(),l=b(c).width(),i=0,s=0;if(!1!==d.collection)if(f=document.createElement("canvas"),
f.getContext&&f.getContext("2d"))for(var m=[],f=b(d.collection),k=d.collectionHeight,a=0;a<f.length;a++){var g=f[a].getBoundingClientRect(),h=document.createElement("canvas"),t=[];if(0<g.top-k){document.body.appendChild(h);h.style.position="absolute";h.height=k;h.width=g.width;h.style.left=g.left+"px";h.style.top=g.top-k+"px";for(var q=0;q<g.width;q++)t[q]=[];m.push({element:h,x:g.left,y:g.top-k,width:g.width,height:k,colData:t})}}else d.collection=!1;b(c).get(0).tagName===b(document).get(0).tagName&&
(i=25);b(window).bind("resize",function(){n=b(c).height();l=b(c).width()});for(a=0;a<d.flakeCount;a+=1)f=j.length,j.push(new u(e(i,l-i),e(0,n),e(100*d.minSize,100*d.maxSize)/100,e(d.minSpeed,d.maxSpeed),f));d.round&&b(".snowfall-flakes").css({"-moz-border-radius":d.maxSize,"-webkit-border-radius":d.maxSize,"border-radius":d.maxSize});d.shadow&&b(".snowfall-flakes").css({"-moz-box-shadow":"1px 1px 1px #555","-webkit-box-shadow":"1px 1px 1px #555","box-shadow":"1px 1px 1px #555"});var p=!1;d.deviceorientation&&
b(window).bind("deviceorientation",function(a){p=0.1*a.originalEvent.gamma});r();this.clear=function(){b(c).children(".snowfall-flakes").remove();j=[];clearTimeout(s)}};b.fn.snowfall=function(c){if("object"==typeof c||void 0==c)return this.each(function(){new b.snowfall(this,c)});if("string"==typeof c)return this.each(function(){var c=b(this).data("snowfall");c&&c.clear()})}})(jQuery);