public function Ball()
{
    super();
    draw();
    reset();
}

override public function reset():void{
    super.reset();
    centerY = Config.CENTER_Y;
    centerX = Config.CENTER_X;

}

override public function onCollision(e:Entity):void{
    var overlap:Point = new Point(0, 0);
    if(Utilities.getOverlap(this, e, overlap)){
    x += overlap.x;
    y += overlap.y;
    var _hit:Number = ((centerY - e.top) / (e.height)-0.5);
    _vy  *= -1;
    _vx  *= -1;
    if (_hit > 0){
        _vx++;
        _vy++;
    }
    else{
        _vx++;
        _vy++;
    }
}
}