forked from: BitmapDataSample1

/**
 * Copyright nausicaa ( http://wonderfl.net/user/nausicaa )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/fYc8
 */

// forked from nutsu's BitmapDataSample1
package {
    
    import flash.display.Sprite;
    import flash.display.BitmapData;
    import flash.display.Bitmap;
    import flash.geom.Matrix;
    import flash.geom.ColorTransform
    import flash.geom.Point;
    import flash.display.BitmapDataChannel;
    import flash.filters.DisplacementMapFilter;
    import flash.events.Event
    import flash.events.MouseEvent;
    import flash.display.BlendMode;
    
    [SWF(width=465,height=465,backgroundColor=0,frameRate=30)]
    public class BitmapDataSample1 extends Sprite {
        
        private var bmpdata:BitmapData;
        private var sprite:Sprite;
        private var matrix:Matrix;
        private var colortrans:ColorTransform;
        private var filter:DisplacementMapFilter;
        
        public function BitmapDataSample1() {
            //BitmapDataを作成して表示リストに追加
            bmpdata = new BitmapData( 465, 465, false, 0 );
            addChild( new Bitmap(bmpdata) );
            //グラフィックの作成
            sprite = newFig( 0, 0, 40, 0xFFFFFF );
            //Matrixの初期化
            matrix =new Matrix();
            //ColorTransの指定
            colortrans = new ColorTransform();
            
            addEventListener(Event.ENTER_FRAME, enterFrame);
            stage.addEventListener(MouseEvent.CLICK, reset);
        }
        
        private function enterFrame(e:Event):void{
        		//変形
        		matrix.identity();
        		var s:Number = Math.random()*2;
        		matrix.scale(s, s);
        		matrix.rotate(Math.PI*Math.random());
        		matrix.translate(mouseX, mouseY);
        		
        		
        		//エフェクトの初期化
        		var mapBitmap:BitmapData = new BitmapData( 465, 465, false, 0 );
            var mapPoint:Point       = mapBitmap.rect.topLeft;
            var componentX:uint      = BitmapDataChannel.RED;
            var componentY:uint      = BitmapDataChannel.GREEN;
            var scaleX:Number        = 256;
            var scaleY:Number        = 256;
            var r:uint               = 128 + 2;
            var g:uint               = 128 + 1;
            var b:uint               = 128;
            var col:uint             = r << 16 | g << 8 | b;
        		mapBitmap.fillRect(mapBitmap.rect,col);
        		filter = new DisplacementMapFilter( mapBitmap, mapPoint, componentX, componentY, scaleX, scaleY );
        		
        		addEventListener( Event.ENTER_FRAME, enterframe );
            stage.addEventListener( MouseEvent.CLICK, reset );
        		
        		//BitmapDataへ描画
            //bmpdata.draw( sprite, matrix, colortrans, BlendMode.ADD,filter );
        }
        
        private function enterframe(e:Event):void {
            //エフェクトの適用
            bmpdata.applyFilter( bmpdata, bmpdata.rect, bmpdata.rect.topLeft, filter );
            //変形
            matrix.identity();
            var s:Number = Math.random()*2;
            matrix.scale( s, s );
            matrix.rotate( Math.PI * Math.random() );
            matrix.translate( mouseX, mouseY );
            //色変換
            colortrans.greenMultiplier = mouseX / 465;
            colortrans.blueMultiplier  = mouseY / 465;
            colortrans.alphaMultiplier = Math.random();
            //BitmapDataへ描画
            bmpdata.draw( sprite, matrix, colortrans, BlendMode.ADD );
        }
        
        private function reset(e:MouseEvent):void{
        		bmpdata.fillRect(bmpdata.rect, 0x000000);
        }
        
        private function newFig( cx:Number, cy:Number, size:Number, col:uint ):Sprite {
            //中心(cx,cy), 幅高さsize, 色col　のグラフィックを生成
            var shape:Sprite = new Sprite();
            shape.graphics.lineStyle( 0, 0x000000, 0.3 );
            shape.graphics.beginFill( col );
            shape.graphics.drawCircle( cx, cy, size*0.5 );
            shape.graphics.drawCircle( cx, cy, size*0.4 );
            var w:Number = size * 0.6;
            var h:Number = size * 0.15;
            shape.graphics.drawRect( cx - w/2, cy - h/2, w, h );
            shape.graphics.endFill();
            return shape;
        }
    }
}