Suppose that I have an orientation Quaternion
Q, I can compute its forward vector from
V = Q * Vector3.forward easily.
Inversely, suppose that I have its forward vector
V, how do I compute
I know that is not possible, please tell me what's needed beside
V, in order to compute
Motivation behind the problem: I have a forward direction of a game object, I want to find out its up direction and its right direction. I can find out all these 3 directions if I have the orientation Quaternion.