forked from: 2010-6-6 円のランダム移動(＋座標壁反射）

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

// forked from ameo's 2010-6-6 円のランダム移動
package {
    import flash.display.*;
    import flash.events.Event;

    [SWF(frameRate="30", width="465", height="465")]
    public class Animation extends Sprite {
    	   private var _circle:Circle;

    	   public function Animation(){
    	   	//インスタンス
    	   	_circle = new Circle(10);
        //透明度
    	   	_circle.alpha = 0.5;
    	   	//移動方向ランダム（＋）
        	_circle.vx = Math.round(Math.random()*10);
        	_circle.vy = Math.round(Math.random()*10);
    	   	//初期位置
    	   	_circle.x = 100;
    	   	_circle.y = 100;
    	   	//表示
    	   	addChild(_circle);
    	   	

    	   	addEventListener(Event.ENTER_FRAME,enterFrameHandler);
        addEventListener(Event.ENTER_FRAME,zahyou);
    	   }
        private function enterFrameHandler(e:Event):void {
        	   _circle.move();
        }
       private function zahyou(e:Event):void {
        if (_circle.x > 464) {
        	_circle.move();     
        _circle.vx = -Math.round(Math.random()*10);
        } 
        if (_circle.y > 464) {
        	_circle.move();     
        _circle.vy = -Math.round(Math.random()*10);
        } 
       }
}
}
import flash.display.Sprite;
    
class Circle extends Sprite{
   public var vx:Number;
   public var vy:Number;
   public var radius:Number;
    
   public function Circle(_radius:Number,_fillColor:uint = 0xcd5e3c){

      graphics.beginFill(_fillColor);
      graphics.drawCircle(0,0,_radius);
      graphics.endFill();

      radius = _radius
    }
   public function move():void{
        	 x += vx;
        	 y += vy;
        } 
        }