flash on 2010-1-13

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

package{
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	[SWF(width=465,height=465)]
	
	  public class test extends Sprite{
	  
	  private var ball:BALL;
	  private var handls:Array;
	  private var Numhandls:int=3;
	  private var spring:Number =0.1;
	  private var friction:Number =0.95;
	  	
	  	
	  	public function test(){
	  		init();
	  		}
	  		private function init():void{
	  		  ball=new BALL(20);
	  		  addChild(ball);
	  		   
	  		handls=new Array();
	  		for(var i:int=0;i<Numhandls;i++){
	  			var handl:BALL=new BALL(10,0x000000);
	  			handl.x =Math.random()*465;
	  			handl.y =Math.random()*465;
	  		    addEventListener(MouseEvent.MOUSE_DOWN,onPress);
	  		    addChild(handl);
	  			handls.push(handl);	
			}	
			addEventListener(Event.ENTER_FRAME,one);
			addEventListener(MouseEvent.MOUSE_UP,up);		
	  			}
	  				
	  				private function one(event:Event):void{
	  					for(var i:int=0;i<Numhandls;i++){
	  						var handl:BALL =handls[i] as BALL;
	  						var dx:Number =handl.x-ball.x;
	  						var dy:Number =handl.y-ball.y;
	  						ball.vx+=dx*spring;
	  						ball.vy+=dy*spring;
	  						}
	  					ball.vx *=friction;
	  					ball.vy *=friction;
	  					ball.x +=ball.vx;
	  					ball.y +=ball.vy;
	  					
	  					graphics.clear();
	  					graphics.lineStyle(1);
	  					for(i=0;i<Numhandls;i++){
	  					graphics.moveTo(ball.x,ball.y);
	  					graphics.lineTo(handls[i].x,handls[i].y)
	  					}
	  				}
	  					
	  					private function onPress(event:MouseEvent):void{
	  						event.target.startDrag();
	  						}
	  						private function up(event:MouseEvent):void{
	  							stopDrag();
	  							}
	  				
	  	}
}

import flash.display.Sprite;

class BALL extends Sprite{
	public var radius:int;
	public var color:uint;
	public var vx:Number =0;
	public var vy:Number =0;
	
	public function BALL(radius:int=10,color:uint=0xff0000){
		this.radius =radius;
		this.color =color
		graphics.beginFill(color);
		graphics.drawCircle(0,0,radius);
		graphics.endFill();
		}
}