I would say this post belongs in Advanced Applied Math. I would think you'd use angles from some equilibrium direction (call that "straight ahead"). In addition, you'd have to know the distance from the camera to your head.
Hi everyone, I want to find a mathematical relationship between my head direction and the direction of a camera placed at a distance. The objective is to make the camera heading to same point where my head is looking at. Both my head and the camera are in the horizontal plane and the motion will be Pan (yaw) motion. Some type of reference transformation has to be applied but I don’t know how to find the relation of my heading verses the camera heading.