WarpEffect - フィルター「ゆがみ」

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lines:94
license : MIT License
modified : 2010-06-24 22:34:34

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package
{
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Loader;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.filters.BlurFilter;
    import flash.filters.DisplacementMapFilter;
    import flash.geom.ColorTransform;
    import flash.geom.Matrix;
    import flash.geom.Point;
    import flash.net.URLRequest;
    import flash.system.LoaderContext;
    import flash.text.TextField;
    
    public class WarpEffect extends Sprite
    {
        private const BITMAP_FILE:String="http://assets.wonderfl.net/images/related_images/a/a1/a1dd/a1dd17e877334ce7bb3253bb57f55bd0e512110c";
        
        private var bdSrc:BitmapData;
        private var bdView:BitmapData;
        private var bdDisplasement:BitmapData;
        private var displasementFilter:DisplacementMapFilter;
        
        private var isMouseDown:Boolean=false;
        private var lastMousePos:Point;
        
        public function WarpEffect()
        {
            var tfOut:TextField=new TextField();
            addChild(tfOut);
            tfOut.autoSize="left";
            tfOut.appendText("bitmap loading...\n");
            
            var loader1:Loader=new Loader();
            loader1.load(new URLRequest(BITMAP_FILE),new LoaderContext(true));
            loader1.contentLoaderInfo.addEventListener(Event.INIT,function(e:Event):void
            {
                var loader2:Loader=new Loader();
                loader2.loadBytes(loader1.contentLoaderInfo.bytes);
                loader2.contentLoaderInfo.addEventListener(Event.COMPLETE,function(e:Event):void
                {
                    tfOut.appendText("load complete");
                    removeChild(tfOut);
                    
                    bdSrc=new BitmapData(loader2.width,loader2.height);
                    bdSrc.draw(loader2);
                    
                    bdView=bdSrc.clone();
                    var bitmap:Bitmap=new Bitmap(bdView);
                    addChild(bitmap);
                    
                    bdDisplasement=new BitmapData(bdSrc.width,bdSrc.height,false,0x8080);
                    displasementFilter=new DisplacementMapFilter(bdDisplasement,new Point(),2,4,100,100,"clamp");
                    
                    lastMousePos=new Point(mouseX,mouseY);
                    stage.addEventListener(MouseEvent.MOUSE_DOWN,function(e:MouseEvent):void
                    {
                        isMouseDown=true;
                    });
                    stage.addEventListener(MouseEvent.MOUSE_UP,function(e:MouseEvent):void
                    {
                        isMouseDown=false;
                    });
                    stage.addEventListener(MouseEvent.MOUSE_MOVE,mmoveHandler);
                    
                    //addChild(new Bitmap(bdDisplasement));
                });
            });
        }
        
        private function mmoveHandler(e:MouseEvent):void
        {
            if(isMouseDown)
            {
                var mat:Matrix=new Matrix();
                mat.translate(mouseX,mouseY);
                
                var mode:String;
                var xdis:int=mouseX-lastMousePos.x;
                var ydis:int=mouseY-lastMousePos.y;
                
                var ct:ColorTransform=new ColorTransform();
                ct.greenMultiplier=1/0xFF*Math.abs(xdis);
                ct.blueMultiplier=1/0xFF*Math.abs(ydis);
                
                var sp:Sprite=new Sprite();
                sp.filters=[new BlurFilter(32,32)];
                sp.graphics.lineStyle(20,0x00FF00);
                sp.graphics.moveTo(0,0);
                sp.graphics.lineTo(-xdis,-ydis);
                if(xdis<0)mode="add";
                else mode="subtract";
                bdDisplasement.draw(sp,mat,ct,mode);
                
                sp.graphics.clear();
                sp.graphics.lineStyle(50,0x0000FF);
                sp.graphics.moveTo(0,0);
                sp.graphics.lineTo(-xdis,-ydis);
                if(ydis<0)mode="add";
                else mode="subtract";
                bdDisplasement.draw(sp,mat,ct,mode);
                
                bdView.applyFilter(bdSrc,bdSrc.rect,bdSrc.rect.topLeft,displasementFilter);
            }
            lastMousePos=new Point(mouseX,mouseY);
        }
    }
}

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