In article <3ffef8d2@news.povray.org>, Jellby <jel### [at] M-yahoocom> 
wrote:



> a definite inside and outside (when in the surface of the torus).

It is two-sided...I don't know if that's a requirement for it to be a 

but that page kind of contradicts itself, giving a definition of a 


there's not really any other differences between the shapes. I think 
it's close enough, though...

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
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