[Radiance-general] Planispheric projection

[Greg Ward]

Wikipedia, dude.  That's what I used...

	http://en.wikipedia.org/wiki/Stereographic_projection

-Greg

> From: Charles Ehrlich <ckehrlich at yahoo.com>
> Date: March 18, 2008 8:13:55 PM PDT
>
> The PDF does a good job of explaining how it works.
> I was looking for the equation relating angular position to  
> distance from the center of the projection.
>
> -Chas
> =======
>
> Hi Chas,
>
> > Can you please explain how the "planospheric" fisheye projecting
> > differs from the "-vta" angular fisheye project with "-vh 180"?
>
> Hmm, I thought I'd done that in the PDF. Typically, all fisheye
> projections are used with a -vh and -vv of 180. The difference is the
> projection of the hemisphere onto a flat surface. Let me know where
> the PDF needs some more clarifications.
>
> Axel