package
{
        import flash.display.Bitmap;
        import flash.display.BitmapData;
        import flash.display.GradientType;
        import flash.display.Sprite;
        import flash.display.StageAlign;
        import flash.display.StageScaleMode;
        import flash.events.MouseEvent;
        import flash.filters.GlowFilter;
        import flash.geom.Matrix;
        import flash.geom.Point;
        
        public class @ax-lib-flex-animation-code-01-BitmapCollision-BitmapCollision2 extends Sprite
        {
                private var bmpd1:BitmapData;
                private var bmp1:Bitmap;
                private var bmpd2:BitmapData;
                private var bmp2:Bitmap;
                
                public function @ax-lib-flex-animation-code-01-BitmapCollision-BitmapCollision2()
                {
                        stage.align = StageAlign.TOP_LEFT;
                        stage.scaleMode = StageScaleMode.NO_SCALE;
                        
                        // make a star
                        var star:Star = new Star(50);
                        
            // make a gradient circle
                        var matrix:Matrix = new Matrix();
                        matrix.createGradientBox(100, 100, 0, -50, -50);
                        var circle:Sprite = new Sprite();
                        circle.graphics.beginGradientFill(GradientType.RADIAL, [0, 0], [1, 0], [0, 255], matrix);
                        circle.graphics.drawCircle(0, 0, 50);
                        circle.graphics.endFill();
                        
                        // make a fixed bitmap, draw the star into it
                        bmpd1 = new BitmapData(100, 100, true, 0);
                        bmpd1.draw(star, new Matrix(1, 0, 0, 1, 50, 50));
                        bmp1 = new Bitmap(bmpd1);
                        bmp1.x = 200;
                        bmp1.y = 200;
                        addChild(bmp1);
                        
                        // make a moveable bitmap, draw the star into it, too
                        bmpd2 = new BitmapData(100, 100, true, 0);
                        bmpd2.draw(circle, new Matrix(1, 0, 0, 1, 50, 50));
                        bmp2 = new Bitmap(bmpd2);
                        addChild(bmp2);
                        
                        stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMoving);
                }
                
                private function onMouseMoving(event:MouseEvent):void
                {
                        // move bmp2 to the mouse position (centered).
                        bmp2.x = mouseX - 50;
                        bmp2.y = mouseY - 50;
                        
                        // the hit test itself.
                        if(bmpd1.hitTest(new Point(bmp1.x, bmp1.y), 255, bmpd2, new Point(bmp2.x, bmp2.y), 255))
                        {
                                bmp1.filters = [new GlowFilter()];
                                bmp2.filters = [new GlowFilter()];
                        }
                        else
                        {
                                bmp1.filters = [];
                                bmp2.filters = [];
                        }
                }
        }}