package {
	import flash.accessibility.Accessibility;
	import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.geom.Point;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextFormat;
    
    [SWF(width="465", height="465", backgroundColor="0xffffff", frameRate="30")]
    public class FlashTest extends Sprite {
    		//重力の設定
    		private const GRAVITY:Number = 0.9;
    		//跳ね返り係数。跳ね返った後、減るスピードの率
    		private const BOUNCE:Number = -0.7;
    		//摩擦係数
    		private const FRICTION:Number = 0.9;
    		
    		private var _target:Sprite;
    		private var _speed:Point;
    		private var _acc:Point;
    		private var _mouse:Point;
    		
        public function FlashTest() {
        		var tf:TextFormat = new TextFormat();
        		tf.font = "_typewriter"
        		tf.size = 12;
        		
            var txt:TextField = new TextField();
            txt.defaultTextFormat = tf;
            txt.text="ドラッグすると飛ぶ";
            txt.autoSize = TextFieldAutoSize.LEFT;
            txt.x = stage.stageWidth /2 -txt.width/2;
            addChild(txt);
            
            _speed = new Point();
            _acc = new Point();
            _mouse = new Point();
            
            _target = new Particle();
            _target.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownListener);
            _target.x = Math.random()*(stage.stageWidth - _target.width) + _target.width/2;
            addChild(_target);
            addEventListener(Event.ENTER_FRAME, enterFrameListener);
        }
        
        private function mouseDownListener(e:MouseEvent):void{
        	
        }
        private function mouseUpListener(e:MouseEvent):void{
        	
        }
        private function enterFrameListener(e:Event):void{
        		graphics.clear();
        		
        		_speed.y += GRAVITY;
        		_speed.x += FRICTION;
        		
        		_target.x += _speed.x;
        		_target.y += _speed.y;
        		
        		//衝突時には、反対方向のスピードを加算
        		if(stage){
        			
        		}
        }
        
        // during _target is dragging
        private function enterFrameListener2(e:Event):void{
        	
        }
    }
}

import flash.display.Graphics;
import flash.display.MovieClip;

class Particle extends MovieClip{
	public function Particle():void{
		var gr:Graphics = graphics;
		gr.beginFill(0xCCCCCC * Math.random() + 0xCCCCCC, 0.9);
		gr.drawCircle(0, 50, 20);
	}
}

flash on 2010-2-5