dot particle

...
* @author Default
* @version 0.1

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license : All rights reserved
modified : 2008-12-17 17:39:23

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// write as3 code here..
/**
* ...
* @author Default
* @version 0.1
*/

package  {
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	[SWF(width="400", height="400", frameRate="30", backgroundColor="#000000")]
	
	public class Sample2 extends Sprite{
		
		private var _dotList:Array;
		private var _flag:Boolean = true;
		
		public function Sample2() {
			var wNum:int = 10;
			var hNum:int = 10;
			var array:int = 0;
			var dotWidth:int = 10;
			var dotHeight:int = 10;
			var dotMargin:int = 2;
			
			_dotList = [];
			
			for(var j:int=0; j<hNum; j++){
				for(var i:int=0; i<wNum; i++){
					var tempX:int = i*(dotWidth+dotMargin)+stage.stageWidth/2-wNum*((dotWidth+dotMargin)/2);
					var tempY:int = j*(dotHeight+dotMargin)+stage.stageHeight/2-hNum*((dotHeight+dotMargin)/2);
					//var tempX:Number = (stage.stageWidth/2-20)*Math.sin(array*2*Math.PI/stage.stageWidth)+stage.stageWidth/2;
					//var tempY:Number = (stage.stageHeight/2-20)*Math.cos(array*2*Math.PI/stage.stageHeight)+stage.stageHeight/2;
					
					var dot:Dot = new Dot(dotWidth,dotHeight,tempX,tempY);
					_dotList.push(dot);
					array++
				}
			}
			
			addEventListener(Event.ENTER_FRAME, draw);
			stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
		}
		
		private function draw(e:Event):void
		{
			graphics.clear();
			for(var i:int=0; i<_dotList.length; i++){
				_dotList[i].display(graphics);
				_dotList[i].move();
				_dotList[i].goOut();
			}
		}
		
		private function onMouseDown(e:MouseEvent):void
		{
			_flag  = !_flag;
			for(var i:int=0; i<_dotList.length; i++){
				_dotList[i].flag = _flag;
			}
		}
	}
	
}

/**
* ...
* @author Default
* @version 0.1
*/

import flash.display.Graphics;

class Dot {
	
	private var rectW:int;
	private var rectH:int;
	private var posX:Number;
	private var posY:Number;
	private var nextX:Number;
	private var nextY:Number;
	private var diffX:Number;
	private var diffY:Number;
	private var goalX:int;
	private var goalY:int;
	private var speed:Number;
	public var flag:Boolean;
	
	public function Dot(w:int, h:int, x:Number, y:Number) {
		rectW = w;
		rectH = h;
		posX = x;
		posY = y;
		nextX = x;
		nextY = y;
		goalX = x;
		goalY = y;
		speed = 0.01;
		flag = true;
	}
	
	public function display(graphic:Graphics):void
	{
		var color:int = 0xFFFFFF;
		graphic.beginFill(color);
		graphic.drawRect(posX-rectW/2, posY-rectH/2, rectW, rectH);
		graphic.endFill();
	}
	
	public function move():void
	{
		if(flag){
			nextX = goalX;
			nextY = goalY;
			speed = 0.1;
		}else{
			nextX += Math.random()*100-50;
			nextY += Math.random()*100-50;
			speed = 0.01;
		}
		
		diffX = (posX-nextX)*speed;
		diffY = (posY-nextY)*speed;
		
		posX -= diffX;
		posY -= diffY;
	}
	
	public function goOut():void
	{
		if(posX>400+rectW){
			posX = 0;
			nextX = 0;
		}
		if(posY>400+rectH){
			posY=0;
			nextY=0;
		}
		if(posX<0-rectW){
			posX = 400;
			nextX = 400;
		}
		if(posY<0-rectH){
			posY  = 400;
			nextY = 400;
		}
	}
	
}

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