package 
{
	import flash.display.Graphics;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.Point;
	
	/**
	 * ...
	 * @author bouze
	 */
	public class Main extends Sprite
	{
		private var drawLayer:Sprite;
		private var particles:Array = new Array();
		private var pNum:int = 10;
		private var maxDistance:Number = 20;
		private var friction:Number = 0.3;
		
		public function Main()
		{
			init();
		}
		
		private function init():void
		{
			drawLayer = new Sprite();
			addChild(drawLayer);
			initParticles();
			addEventListener(Event.ENTER_FRAME, update);
		}
		
		private function initParticles():void
		{
			var i:int;
			for (i = 0; i < pNum; i++)
			{
				/*
				var circle:Sprite = new Sprite();
				var g:Graphics = circle.graphics;
				g.lineStyle( 1 );
				g.drawCircle( 0, 0, 4 );
				drawLayer.addChild( circle );
				*/
				particles.push(
				{
					//ref: circle,
					x: mouseX,
					y: mouseY,
					dx: 0,
					dy: 0
				} );
			}
		}
		
		private function move():void
		{
			var i:int;
			for (i = 0; i < pNum; i++)
			{
				var p:Object = particles[ i ];
				var pp:Object = particles[ i - 1 ];
				
				if ( i == 0 )
				{
					p.x += ( mouseX - p.x ) * friction;
					p.y += ( mouseY - p.y ) * friction;
				}
				else
				{
					p.x += ( pp.x - p.x ) * friction * ( pNum - i ) * 0.1;
					p.y += ( pp.y - p.y ) * friction * ( pNum - i ) * 0.1;
				}
				//p.ref.x = p.x;
				//p.ref.y = p.y;
			}
		}
		
		private function draw():void
		{
			var g:Graphics = drawLayer.graphics;
			g.clear();
			g.lineStyle(1);
			
			var i:int;
			for (i = 0; i < pNum - 2; i++) 
			{
				g.moveTo( particles[ i ].x, particles[ i ].y );
				g.lineTo( particles[ i + 1 ].x, particles[ i + 1 ].y );
				g.lineTo( particles[ i + 2 ].x, particles[ i + 2 ].y );
				g.lineTo( particles[ i ].x, particles[ i ].y );
			}
		}
		
		private function update(e:Event):void
		{
			move();
			draw();
		}
	}
}

hybrid-brush-01