forked from: モアレっぽい感じ

/**
 * Copyright fukt ( http://wonderfl.net/user/fukt )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/pK6A
 */

// forked from sakusan393's モアレっぽい感じ
package  {
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Sprite;
    import flash.events.Event;
  import net.hires.debug.Stats;
    
    [SWF(backgroundColor="0", frameRate="30", width="465", height="465")]
    
    /**
     * ...
     * @author 393
     */
    public class Yura extends Sprite{
        private var _bmd:BitmapData = new BitmapData(465, 465,false,0);
        private var _bm:Bitmap = new Bitmap(_bmd);
        private var _phase:int;
        private var _gain:int;
        
        public function Yura() {
            addChild(_bm);
            addChild(new Stats());
            
          addEventListener(Event.ENTER_FRAME, timerHandler);
        };
        private function timerHandler(e:Event):void {
            _gain += (((mouseY - (stage.stageHeight / 2))) - _gain) * 0.1;
            
            var substract:int = ((mouseX - stage.stageWidth/2)/stage.stageWidth) * 200+2;
            _phase -= substract;
            if (_phase >= 0) _phase -= 360;
            if (_phase <= -360) _phase = 360 + _phase;
            
            _bmd.lock();
            _bmd.fillRect(_bmd.rect, 0);
            drawLine(0+_phase,_gain,0xFF0000);
            drawLine(1+_phase+3*_phase-120,_gain,0x00FF00);
            drawLine(2+_phase+6*_phase-240,_gain,0x0000FF);
            _bmd.unlock();
        }
        private function drawLine(phase:int, gain:int, color:int):void {
            for (var i:int = phase; i < 465; i += 3) {
                var yMax:int = Math.sin(Math.PI / (mouseX/360) * (phase + i)) * gain+465 / 2;
                for (var j:int = 0; j < yMax; j++) {
                    _bmd.setPixel(i, j, color);
                }
            }
        }
    }
}