public function resize(fx:Number = 1.0, fy:Number = -1.0): Number {
     if (fy == -1.0) fy = fx;
     var x:Number = this.width / player.width;
     var y:Number = this.height / player.height;
     var s:Number = 1.0;
     if (x > y) s = y; else s = x;
     player.scaleX = s * fx; player.scaleY = s * fy;
     return s;
     }