パーティクル生成用

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

package {
    import flash.display.Sprite;
    import flash.events.Event;
    [SWF(backgroundColor="0x000000")]
    public class FlashTest extends Sprite {
        
        private var particles:Array;
        private var numParticles:uint = 20;
        
        public function FlashTest() {
             particles = new Array();
             for(var i:int=0; i<numParticles; i++) {
             var b:Ball = new Ball();
             b.x = Math.random()*stage.stageWidth;
             b.y = Math.random()*stage.stageHeight;
             addChild(b);
             particles.push(b);
             }
                 
             
             
          addEventListener(Event.ENTER_FRAME, onEnter);
        }
       private function onEnter(e:Event):void{
           
            graphics.clear();
            
            
            for(var i:int = 0;i < numParticles;i++)
            {
                var b:Ball = particles[i];
                b.x += b.vx;
                b.y += b.vy;
                if(b.x > stage.stageWidth)
                {
                    b.x = 0;
                }
                else if(b.x < 0)
                {
                    b.x = stage.stageWidth;
                }
                if(b.y > stage.stageHeight)
                {
                    b.y = 0;
                }
                else if(b.y < 0)
                {
                    b.y = stage.stageHeight;
                }
            }
         }
    }
}



import flash.display.Sprite;

class Ball extends Sprite
{
    public var vx:Number = Math.random() +0.5;
    public var vy:Number = Math.random() +0.5;
    public var mass:Number = 3;
    public var radius:Number = 30
    public var color:uint = 0xFF0000;
    
    public function Ball(r:Number = 10, c:uint = 0x11FFCC)
    {
        radius = r;
        color = c;
        
        graphics.beginFill(c);
        graphics.drawCircle(0, 0, r);
        graphics.endFill();
    }

}