Direction between 2 Vectors

[Dan]

I dont think the man is looking for an angle between two vectors. He is asking for the following: given two positions (origin and target) in 3d space he needs the Yaw and Pitch values which will orient the camera looking from the origin at the target. Colin, what I think you are looking for is simply: rV.y := ArcSin(Dir.y); where Dir is a normalized direction vector (Dir := normlize(targ.x - posX, targ.y - posY, targ.z - posZ))