public override void Attack(LocatableObject obj)
        {
            animationState = ShipAnimationState.None;
            path           = null;
            SpaceShip ship = (SpaceShip)obj;

            for (int i = 0; i < speed; i++)
            {
                if (Math.Sqrt(Math.Pow(ship.Position.X - Position.X, 2) + Math.Pow(ship.Position.Y - Position.Y, 2)) <= visibility * 0.8)
                {
                    fire(ship);
                    break;
                }
                else
                {
                    MoveTo(ship.Position);
                }
            }
        }
 public void fire(SpaceShip ship)
 {
     ship.GetDamage(damage);
     animationState = ShipAnimationState.Attack;
 }