private void OnMouseDown()
{
if (!mgr.attached)
{
var item = Instantiate(target, transform.position, transform.rotation);
var instantiatedItem = item.GetComponent <placeable>();
instantiatedItem.pivot = pivot;
instantiatedItem.pivotrb = pivotrb;
instantiatedItem.rb.isKinematic = false;
instantiatedItem.MyOnMouseDown();
mgr.attach(item.gameObject);
}
}