How do I get a relative rotation between two positions? For example, I have two objects a amp b. a's position is 12, 16, 2 and b's position is 14, 16, 3 I need to know how to find a relative rotation between them. By relative rotation I mean this a's pitch and yaw so a is looking at b. I have no helping methods like lookingAt() etc. I only know a's x,y,z,yaw,pitch and b's x,y,z. Any help?