Steven Jones wrote:

> I'm trying to create my own version of the impossible staircase in Pov-ray.
> Does anyone know how to work out both the horizontal and vertical angles of
> a Perspective camera?

Most people use an orthographic camera for this kind of trick. There are a few
IRTC entries that use it to recreate Escher's scenes, like the impossible
waterfall.

You can use the angle keyword in your camera declaration to tell POV-Ray what
horizontal angle you want.

If you want to find the horizontal and vertical angles between any two points
in space, that's a much more difficult problem. I can post some code I've
worked out if you'd like


--
Josh English
eng### [at] spiritonecom
The POV-Ray Cyclopedia http://www.spiritone.com/~english/cyclopedia/

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