ベーシックパーティクル練習

/**
 * Copyright hacker_szoe51ih ( http://wonderfl.net/user/hacker_szoe51ih )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/5ROO
 */

package {
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.geom.Matrix;
    import flash.geom.Transform;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        [SWF(width=465,height=465,backgroundColor=0,frameRate=30)]
        
        //public var myBox:Particle;
        public var array:Array;
        public var max:int=300;
        public var centerX:Number=stage.stageWidth/2;
        public var centerY:Number=stage.stageHeight/2;
        //public var nRadian:Number;
        
        public function FlashTest() {
        
                init();
            
        }
        
        public function init():void{
            
            array=new Array();
        
            for(var i:int=0; i<max; i++){
                var particle:Particle=new Particle();
                array.push(particle);
                addChild(particle);
                var rondomX:int=Math.random()*stage.stageWidth;
                var rondomY:int=Math.random()*stage.stageHeight;
                particle.x=rondomX;
                particle.y=rondomY;
                
            }
             
  
            addEventListener(Event.ENTER_FRAME,onEnterFrame);
        
        }
        
        public function onEnterFrame(e:Event):void{
            
                for(var i:int=0; i<array.length;i++){
                    
                    array[i].x+=((array[i].x+array[i].vx)-array[i].x)*0.05;
                    array[i].y+=((array[i].y+array[i].vy)-array[i].y)*0.05;
                    
                    if(array[i].x<0){
                        array[i].x=465;               
                    }
                    if(array[i].x>465){
                        array[i].x=0;               
                    }
                    if(array[i].y>465){
                        array[i].y=0;
                    }
                    if(array[i].y<0){
                        array[i].y=0465
                    }
    
                }
            
            

            
        }


        
        
        
        
    }
}


import flash.display.*;
import flash.filters.*;

class Particle extends MovieClip{
    
    public var clip:Sprite;
    public var color:uint;
    public var hankei:int;
    public var vx:Number;
    public var vy:Number;
    
    public function Particle(){
        
        vx=Math.floor(Math.random()*100+1)-50;
        vy=Math.floor(Math.random()*100+1)-50;
        color=Math.floor(Math.random()*0xffffffffff);
        hankei=Math.floor(Math.random()*10)+1;
        
        graphics.lineStyle(0,0,0);
        graphics.beginFill(color);
        graphics.drawCircle(0,0,hankei);
        graphics.endFill();
        
    }

    

}