forked from: 円を動かす

/**
 * Copyright hacker_xaotp5zq ( http://wonderfl.net/user/hacker_xaotp5zq )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/5ofr
 */

// forked from 9re's 円を動かす
package {
    import flash.display.*;
    import flash.events.Event;
 
     [SWF(frameRate="30", width="465", height="465")]
     public class MyFirstAnimation extends Sprite { 
     	private var _circle:Circle;
     	
     	public function MyFirstAnimation(){
     		_circle = new Circle(50);
     		_circle.alpha = 0.25;
     		_circle.vx = 4;
     		_circle.vy = 4;
     		
     		_circle.y = 465/2;
     		_circle.x = 465/2;
     		addChild(_circle);
     		addEventListener(Event.ENTER_FRAME, enterFrameHandler);
        }
        
        private function enterFrameHandler(e:Event):void {
            // 1フレーム分動かす
            _circle.move();
        }
    }
}
     		
 
import flash.display.Sprite;

class Circle extends Sprite {
    public var vx:Number;
    public var vy:Number;
    public var radius:Number;
    // コンストラクタ
    public function Circle(_radius:Number, _fillColor:uint = 0x000000) {
        // 塗り_fillColor, 半径_radiusの円
        graphics.beginFill(_fillColor);
        graphics.drawCircle(0, 0, _radius);
        graphics.endFill();
        // 半径の大きさをパブリックな変数に保存しておく
        radius = _radius
    }
    // 1フレーム分の動き
    public function move():void {
        x += vx;
        y += vy;
    }
}