forked from: LineEffect(3)

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

// forked from okoi's LineEffect(3)
package 
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.events.MouseEvent;
    
    [SWF(width = "465", height = "465", frameRate = "60")]
    
    /**
     * ...
     * @author 
     */
    public class Main extends Sprite 
    {
        public static const WIDTH:int = 465;
        public static const HEIGHT:int = 465;
        private var canvas:BitmapData;
        private var sprite:Sprite;
        private var color:uint;
        private var counter:int;
        
        private var particleList:/*Particle*/Array;
        
        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }
        
        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point
            graphics.beginFill(0);    graphics.drawRect( 0, 0, WIDTH, HEIGHT );    graphics.endFill();
        
            canvas = new BitmapData( WIDTH, HEIGHT, true, 0 );
            addChild( new Bitmap(canvas) );
            
            sprite = new Sprite();
            
            IniteParticle();
            
            addEventListener(Event.ENTER_FRAME, EnterFrameHandler );
            stage.addEventListener( MouseEvent.CLICK, IniteParticle );
        }
        
        private function EnterFrameHandler( e:Event ) : void
        {
            sprite.graphics.clear();
            
            var angle:Number = (stage.mouseX - (WIDTH / 2)) / 20;
            var speed:Number = (stage.mouseY - (HEIGHT / 2)) / 40;
            
            var linesize:Number = Math.abs( stage.mouseY - (HEIGHT / 2) ) / 50;
            sprite.graphics.lineStyle(1 + linesize,color);
            
            for ( var i:int = 0; i < particleList.length; i++ )
            {
                particleList[i].angle += angle;
                var rad:Number = particleList[i].angle * Math.PI / 180;
                particleList[i].prevx = particleList[i].x;
                particleList[i].prevy = particleList[i].y;
                particleList[i].x += Math.cos( rad ) * speed;
                particleList[i].y += Math.sin( rad ) * speed;
                
                sprite.graphics.moveTo( particleList[i].prevx, particleList[i].prevy );
                sprite.graphics.lineTo( particleList[i].x, particleList[i].y );
            }
            
            canvas.draw( sprite );
            counter++;
            if(counter%120==0)
            {
                color=Math.random()*0xffffff;
                counter=0;
                
            }
        }
        
        private function IniteParticle( e:MouseEvent = null ) : void
        {
            canvas.lock();
            canvas.fillRect(canvas.rect, 0 );
            canvas.unlock();
            
            particleList = [];
            

            particleList.push( new Particle( WIDTH / 2, HEIGHT / 2, 90  ) );
            particleList.push( new Particle( WIDTH / 2   , HEIGHT / 2, 180 ) );
            particleList.push( new Particle( WIDTH / 2, HEIGHT / 2    , 270 ) );
            particleList.push( new Particle( WIDTH / 2      , HEIGHT / 2, 0   ) );   
             
            var linesize:Number = Math.abs( stage.mouseY - (HEIGHT / 2) ) / 50;
            color=0xFFFFFF*Math.random();
            sprite.graphics.lineStyle(1 + linesize,0xFFFFFF*Math.random());            
        }
        
    }
    
}

class Particle {
    public var x:Number;
    public var y:Number;
    public var prevx:Number;
    public var prevy:Number;
    public var angle:Number;
    
    public function Particle(x:Number, y:Number, angle:Number)
    {
        this.x = x;
        this.y = y;
        this.angle = angle;
    }
}