flash on 2010-1-27

/**
 * Copyright 0color ( http://wonderfl.net/user/0color )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/w05a
 */



package{
	import flash.display.Sprite;
	import flash.events.Event;
	public class BallFollowingMouse extends Sprite{
		private var ballCount:uint = 50;
		private var speed:Number = 0.2;
		public function BallFollowingMouse(){
			for(var i:uint = 0; i<ballCount;i++){
				addChild(new Ball(this,200));
			}
			addEventListener(Event.ENTER_FRAME,followMouse);
		}
		private function followMouse(eventObject:Event):void{
			dispatchEvent(new BallEvent(BallEvent.FOLLOW,mouseX,mouseY,speed));
		}
	}
}

import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.Event;
class Ball extends Sprite{
	private const deceleration:Number = 0.2;
	private var angle:Number;
	private var radius:Number;
	private var sizeRate:Number = 0.1;
	public function Ball(timeline:Sprite,maxRadius:Number){
		var randomRate:Number = Math.random();
		angle = 2*Math.PI*Math.random();
		radius = maxRadius*randomRate;
		createBall(randomRate);
		timeline.addEventListener(BallEvent.FOLLOW,follow);
	}
	
	private function createBall(randomRate:Number):void{
		var myGraphics:Graphics = graphics;
		myGraphics.beginFill(Math.floor(0xFFFFFF*randomRate)+1);
		myGraphics.drawCircle(0,0,radius*sizeRate);
		alpha = 1-randomRate;
	}
	
	private function follow(eventObject:BallEvent):void{
		var randomRate:Number = Math.random();
		angle += eventObject.speed;
		angle %= Math.PI*2;
		var nX:Number = eventObject.targetX + radius*Math.cos(angle);
		var nY:Number = eventObject.targetY + radius*Math.sin(angle);
		x +=(nX - x)* deceleration*randomRate;
		y +=(nY - y)* deceleration*randomRate;
	}
}

class BallEvent extends Event{
	public static const FOLLOW:String = "follow";
	private var _targetX:Number;
	private var _targetY:Number;
	private var _speed:Number;
	
	public function get targetX():Number{
		return _targetX;
	}
	
	public function get targetY():Number{
		return _targetY;
	}
	
	public function get speed():Number{
		return _speed;
	} 
	
	public function BallEvent(event_str:String,myTargetX:Number,myTargetY:Number,mySpeed:Number){
		super(event_str);
		_targetX = myTargetX;
		_targetY = myTargetY;
		_speed = mySpeed;
	}
}