public override void Run(GameObject obj)
{
Vector2 psp = findProjectileSpawnPoint(obj);
Vector3 mouseScreenPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
float rotationZ = Mathf.Atan2(Mathf.Abs(mouseScreenPosition.y - psp.y), Mathf.Abs(mouseScreenPosition.x - psp.x));
float dotProd = CrossProduct(mouseScreenPosition, psp);
float rotationY = dotProd < 0 ? 0 : 180f;
ProjectileData pd = Instantiate(objectToSpawn, psp, Quaternion.Euler(0, rotationY, rotationZ)).GetComponent <ProjectileData>();
pd.SetParentId(obj.transform.GetInstanceID());
}
