On Thu, 16 Sep 1999 14:21:50 -0700, Ken wrote:
>
>
>Ron Parker wrote:
>
>> How it's supposed to work, I don't know.
>
>Pov docs say:
>  Panoramic projection: This projection is called "cylindrical
>equirectangular projection". It overcomes the degeneration problem
>of the perspective projection if the viewing angle approaches 180
>degrees. It uses a type of cylindrical projection to be able to use
>viewing angles larger than 180 degrees with a tolerable lateral-
>stretching distortion. The angle keyword is used to determine the
>viewing angle.

Yes, I know what the docs say.  But what do they mean? :)  Which 
viewing angle is one setting?  what does it mean by "a type" of 
cylindrical projection?

I suspect that the code just forgets to multiply x0 and y0 by 
angle/180, but I'm not 100% sure of that.

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