Atomic Movement

/**
 * Copyright jopiruizen ( http://wonderfl.net/user/jopiruizen )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/dGaV
 */

package
{
	import flash.display.Sprite;
	public class FlashTest extends Sprite
	{
		var w:*=470,h:*=470, asize:*=3, sp:*=5;
		//Time Related variables
		var tOut:*=20, tCtr:*=0, tMain:*=1000, tChng:*=2000, tCreate:*=1000;   
		//Elements Related Variables
		var ptbl:Array=[{sym:"H",clr:0xEEEEEE} ,
						{sym:"He",clr:0xE9F479},
						{sym:"Li",clr:0xFCFDE8},
						{sym:"Be",clr:0x45DC72},
						{sym:"B",clr:0xAF2EA3},
						{sym:"C",clr:0xC7320E},
						{sym:"N",clr:0xA4DDF4},
						{sym:"O",clr:0x285EAC}];
		var atoms:Array;
		var area:Sprite;
		public function FlashTest(){loaderInfo.addEventListener("complete", init);}
		function init( e:Object ){
			atoms = new Array();
			loaderInfo.removeEventListener("complete",init);
			area= new Sprite();
			addChild(area);
			df(area,0,0,{w:w,h:h,s:"r"});
			df(this,0,1,{w:w,h:h,s:"r"});
			addEventListener("enterFrame", ef);	
			 
		}
		function ri(i) {
			return Math.floor( Math.random() * i);
		}
		function cl(o) {
			var c = {};
			for( var i in o ) { c[i] = o[i];}
			return c;
		}
		function ce () {
			var anum = ri(7);
		 	var o = cl( ptbl[anum] );
			o.num = anum + 1;
		 	o.dSize = asize * o.num;
		 	o.cFlag = true;
			o.atom = new Sprite();
			o.atom.name = "atom";
			o.main = new Sprite() ;
			o.main.name = o.sym + "_" + atoms.length;
			o.main.addChild ( o.atom );
			o.main.x = ri(470 - ( o.dSize / 2 )) ;
			o.main.y = ri(470 - ( o.dSize / 2 )) ;
			o.atom.scaleX = 0;
			o.atom.scaleY = 0;
			df(o.atom,o.clr,0.9,{s:"c",w:o.dSize});
			return o;
		}
		function df(t:*, c:*,a:*,o:* ) {
			t.graphics.beginFill(c,a);
			if( o.s == "c") {
				t.graphics.drawEllipse(0 -( o.w / 2) ,0 -( o.w / 2),o.w,o.w);
			} else if( o.s == "r" ){
				t.graphics.drawRect(0,0,o.w,o.h);
			} 
			t.graphics.endFill();
		}
		function mod(dvn:*,dvsr:*){return((dvn%dvsr)== 0);}
		function ef(e:Object){
			if( mod(tCtr,tCreate) ) {
				var newE = ce();
				 atoms.push( newE ) ;
				 area.addChild( newE.main ) ;
			}
			eAct();
			tCtr += tOut;
			if( tCtr >= 50000) tCtr = 0;
		}
		
		function trd( n ) {
			return Math.PI*n/180;
		}
		function tdg (n ) {
			return n*180/Math.PI;
		} 
		function imd ( o:* ) {
			var r = trd( ri( 360 )) ;
			o.vx=Math.cos(r)*(sp/o.num);
		 	o.vy=Math.sin(r)*(sp/o.num);
		}
	 
		function eAct(){
			//trace("I: "+ atoms.length );
			for( var i:int = 0 ;i < atoms.length ;i++ ) {
				var o:Object = atoms[i];
				if( o.move == true ) {
					o.main.x+=o.vx;
					o.main.y+=o.vy;
				 	if((o.main.x+o.dSize/2)>=w ||(o.main.x-o.dSize/2)<=0) {
						o.vx=o.vx*-1;
						if(o.vx<=0)o.main.x=0+o.dSize/2;
				 		if(o.vx>=w)o.main.x=w-o.dSize/2;
				 	} else if((o.main.y+o.dSize/2)>=h||(o.main.y-o.dSize/2)<=0){
				 		if(o.vy<=0)o.main.y=0+o.dSize/2;
				 		if(o.vy>=h)o.main.y=h-o.dSize/2;
				 		o.vy=o.vy*-1;
				 	}  
				}
				if( o.cFlag ) { //initialize
					if(o.atom.scaleX<1) {
						o.atom.scaleX = o.atom.scaleX + 0.05;
						o.atom.scaleY = o.atom.scaleY + 0.05;
					} else {
						o.atom.scaleX = 1;
						o.atom.scaleY = 1;
						delete o["cFlag"];
						o.move = true;
						imd(o);
					}		
				}
			}
		}
	}
}