Visualization, actually.
I've written an OpenGL application that renders the field in 3D as the camera sees it, based on the tilt, pan, mx, and my values. The FOV is needed to convert mx and my into an angle. Right now I just added in a slider so teams can change it to whatever lens they're using.
The math itself is actually surprisingly complicated (converting to and from 2D screen coordinates to 3D world coordinates), so I don't think I'm going to try to implement something *quite* as precise on the RC. Besides, we don't really need to know the exact range unless the target is centered horizontally in our application, and this constraint turns the equation from matrix math into trig.
It is actually done, and works great - I'm just waiting on our teams' animators to texture the field nicely before I release it on here. I'm a programmer, so my 3D field left much to be desired...
Here's a screen cap from about a week ago - the current build is much prettier.
