moveBalls

/**
 * Copyright you_KAZE ( http://wonderfl.net/user/you_KAZE )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/88qh
 */

//ボールを動かす

package {
    import flash.display.*;
    import flash.events.Event;
    
    [SWF(frameRate="30",width="200",height="200")]
    
    public class FlashTest extends Sprite {
        
        private var _circle:Circle;
        public function FlashTest() {
            _circle = new Circle(10,0x005566);
            _circle.alpha=0.25;
            _circle.vx=3;
            _circle.vy=4;
            
            _circle.x=Math.random()*200;
            _circle.y=Math.random()*200;
            
            addChild(_circle);
            
            addEventListener(Event.ENTER_FRAME,enterFrame);
        }
        
        private function enterFrame(e:Event):void{
        
            _circle.move();    
        }
    }
}

import flash.display.Sprite;
class Circle extends Sprite{
    //move X,Y
    public var vx:Number;
    public var vy:Number;
    //circle radius
    public var radius:Number;
    //コンストラクタ：初期設定
    public function Circle(_radius:Number,_fillColor:uint=0x000000){
        //Fill:_fillColor,radius:_radius
        graphics.beginFill(_fillColor);
        graphics.drawCircle(0,0,_radius);
        graphics.endFill();
        //パブリックな変数に変換
        radius=_radius;
    }
    
    //ボールにおける１フレーム分の処理
    public function move():void{
        x += vx;
        y += vy;
        
        if(x<0){x=0;vx*=(-0.7);}
        if(x>200){x=200;vx*=(-0.7);}
        if(y<0){y=0;vy*=(-0.7);}
        if(y>200){y=200;vy*=(-0.7);}
    }
}