I'm not sure I follow you Ross. For one thing, the camera isn't necessarily going to be at right angles to the bounding box, so it won't necessarily be the same distance from any two points on the bounding box. Also, it's an orthographic/isometric perspective so there's no FOV as such, just the width and height (both the same) of the camera frustum, which are also unknowns.
I've been having yet another go on pen and paper again myself today and I have a couple of ideas but I need to think them through a bit more. Even if the theory is right, I still might have a couple of questions on the practice.
I've been having yet another go on pen and paper again myself today and I have a couple of ideas but I need to think them through a bit more. Even if the theory is right, I still might have a couple of questions on the practice.