I'm currently working on a project that generates povray scenes
programmatically. These scenes can vary in overall dimensions, and I am
having diffculty calculating a camera position that incorporates every
element of the scene, without introducing lots of space around the edges.

Is there a way to calculate the position of the camera, knowing what
direction it should point in. My 3d trig. just isn't up to the challenge.

Values that are known are:
 - A list of scene extremities as 3d coordinates (e.g. a simple block would
have 8 extremities)
 - The camera angle (set at 20 degrees)
 - The direction the camera should point in
 - The aspect ratio

I would appreciate any comments/suggestions(or solutions :) )

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