public void Fire()
{
GameObject tempBullet = Instantiate(Bullet, emitter.position, transform.rotation, null);
Vector3 heading = emitter.transform.position - transform.position;
heading = heading / heading.magnitude;
tempBullet.GetComponent <Rigidbody>().AddForce(heading * force);
tempBullet.GetComponent <Bullet>().Init(gravity, false);
gravity.AddObject(tempBullet.GetComponent <Rigidbody>());
}