In article <3c77bbc9@news.povray.org>, "Zero" <zer### [at] yahoocom> wrote:

> Isn't that how the tetrahedron is defined in shapes.inc?  I didn't check it,
> but I believe all geometrical solids are defined using intersections of
> planes, so all you need is #include "shapes.inc" - all this math for nothing
> ;-)

The file is "shapes2.inc", and the definition isn't quite the same:
#declare Tetrahedron =
 intersection 
  {plane {-y,1}
   plane {-z,1 rotate <19.47,    0, 0>}
   plane {-z,1 rotate <19.47, -120, 0>}
   plane {-z,1 rotate <19.47,  120, 0>}
  }

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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