Team:Oxford/Assets/starfield

(function(d){var a=5000;var c=function(f,i,h,g){this.x=f;this.y=i;this.size=h;this.color=g};c.prototype.mapXYToCanvasCoordinates=function(f,i){var h=Math.round((this.x/a)*f);var g=Math.round((this.y/a)*i);return{x

h,y:g}};var e={getRandomStar:function(){var f=Math.floor(Math.random()*(a+1));var j=Math.floor(Math.random()*(a+1));var h=this._getWeightedRandomSize();var g=this._getWeightedRandomColor();var i=this._applyRandomShade(g);return new c(f,j,h,this._getRGBColorString(i))},_getWeightedRandomSize:function(){var g=[1,1.5,2];var f=[0.8,0.15,0.05];return this._getWeightedRandom(g,f)},_getWeightedRandomColor:function(){var g=[{r:255,g:189,b:111},{r:255,g:221,b:180},{r:255,g:244,b:232},{r:251,g:248,b:255},{r:202,g:216,b:255},{r:170,g:191,b:255},{r:155,g:176,b:255}];var f=[0.05,0.05,0.05,0.7,0.05,0.05,0.05];return this._getWeightedRandom(g,f)},_getRandomShade:function(){var g=[0.4,0.6,1];var f=[0.5,0.3,0.2];return this._getWeightedRandom(g,f)},_applyRandomShade:function(g){var f=this._getRandomShade();if(f!==1){g.r=Math.floor(g.r*f);g.g=Math.floor(g.g*f);g.b=Math.floor(g.b*f)}return g},_getRGBColorString:function(f){return"rgb("+f.r+","+f.g+","+f.b+")"},_getWeightedRandom:function(m,l){var k=function(n,i){return Math.random()*(i-n)+n};var g=l.reduce(function(i,n){return i+n});var j=k(0,g);var f=0;for(var h=0;h<m.length;h++){f+=l[h];f=+f.toFixed(2);if(j<=f){return m[h]}}}};var b=[];d.fn.starfield=function(t){var l=d.extend({starDensity:1,mouseScale:1,seedMovement:true},t);$this=d(this);var g=$this.width();var s=$this.height();var f=g*s;var r=0.002*l.starDensity;var j=Math.floor(f*r);if(l.seedMovement){var n=5;var m=5}else{var n=0;var m=0}var h=d('<canvas id="rocketwagon-canvas">').css({position:"absolute",left:0,top:0,width:"100%",height:"100%"}).attr({width:$this.width(),height:$this.height()}).prependTo($this);for(var p=0;p<j;p++){b.push(e.getRandomStar())}var k=function(){d.each(b,function(i,u){var w=u.x-n;var v=u.y-m;if(w<0){w+=a}if(v<0){v+=a}if(w>a){w-=a}if(v>a){v-=a}u.x=w;u.y=v})};var q=function(){var v=document.getElementById("rocketwagon-canvas");var w=v.width;var i=v.height;v.setAttribute("width",w.toString());v.setAttribute("height",i.toString());if(v.getContext){var u=v.getContext("2d");u.clearRect(0,0,w,i);u.fillStyle="black";u.fillRect(0,0,w,i);d.each(b,function(x,z){var y=z.mapXYToCanvasCoordinates(w,i);u.fillStyle=z.color;u.fillRect(y.x,y.y,z.size,z.size)})}};$this.mousemove(function(y){var x=d(this);var z=x.offset();var w=g/2;var v=s/2;var u=((y.pageX-z.left)-w);var i=((y.pageY-z.top)-v);n=Math.round(l.mouseScale*(u/40));m=Math.round(l.mouseScale*(i/40))});(function o(){requestAnimationFrame(o);k();q()})();return this}}(jQuery));