private void fire()
{
playerSession.AddAmmo(-1);
getDirection();
GameObject arrow = Instantiate(
ArrowPrefab,
transform.position,
Quaternion.Euler(0f, 0f, MathHelper.getAngle(direction) + 90f)
) as GameObject;
arrow.GetComponent <Rigidbody2D>().velocity = direction.normalized * 300f * Time.deltaTime;
}
