package aether.effects.carnival {
          
          import aether.effects.ImageEffect;
          import aether.utils.MathUtil;
          
          import flash.display.Bitmap;
          import flash.display.BitmapData;
          import flash.display.BitmapDataChannel;
          import flash.display.Sprite;
          import flash.geom.Matrix;
          import flash.geom.Point;
          import flash.display.Shape;
          
          public class @ax-graphic-flex-image-effects-07-source-aether-effects-carnival-KaleidoscopeEffect extends ImageEffect {
          
                  private var _startAngle:Number;
                  private var _segments:uint;
  
                  public function @ax-graphic-flex-image-effects-07-source-aether-effects-carnival-KaleidoscopeEffect(
                          segments:uint=8,
                          startAngle:Number=0,
                          blendMode:String=null,
                          alpha:Number=1
                  ) {
                          init(blendMode, alpha);
                          _segments = segments;
                          if (_segments % 2 > 0) _segments++;
                          _startAngle = MathUtil.degreesToRadians(startAngle);
                  }
                  
                  private function drawSegment(index:uint, segment:BitmapData, center:Point, angle:Number):Bitmap {
                          var bitmap:Bitmap = new Bitmap(segment);
                          if (index % 2 > 0) {
                                  bitmap.scaleY = -1;
                                  bitmap.rotation = (index+1)*angle;
                          } else {
                                  bitmap.rotation = index*angle;
                          }
                          bitmap.x = center.x;
                          bitmap.y = center.y;
                          return bitmap;
                  }
          
                  override protected function applyEffect(bitmapData:BitmapData):void {
                          var w:Number = bitmapData.width;
                          var h:Number = bitmapData.height;
                          var r:Number = Math.min(w,h)/2;
                          var segmentAngle:Number = 360/_segments;
                          var theta:Number = MathUtil.degreesToRadians(segmentAngle);
                          var angle:Number = Math.PI-theta;
                          var x:Number = Math.cos(theta)*r;
                          var y:Number = Math.sin(theta)*r;
                          var matrix:Matrix = new Matrix();
                          matrix.translate(-w/2, -h/2);
                          matrix.rotate(-_startAngle);
                          var image:BitmapData = new BitmapData(w, h, true, 0x00000000);
                          image.draw(bitmapData, matrix);
                          var shape:Shape = new Shape();
                          shape.graphics.beginBitmapFill(image, null, false);
                          shape.graphics.lineTo(r, 0);
                          shape.graphics.lineTo(x, y);
                          shape.graphics.lineTo(0, 0);
                          shape.graphics.endFill();
                          var segment:BitmapData = new BitmapData(shape.width, shape.height, true, 0x00000000);
                          segment.draw(shape);
                          var sprite:Sprite = new Sprite();
                          var center:Point = new Point(w/2, h/2);
                          for (var i:uint; i < _segments; i++) {
                                  sprite.addChild(drawSegment(i, segment, center, segmentAngle));
                          }
                          bitmapData.fillRect(bitmapData.rect, 0x00000000);
                          bitmapData.draw(sprite);
                  }
          
          }
          
  }