Here comes my second macro package after the release of "geodesic.inc".
"geometry.inc" defines some basic triangular geometrics that might be
useful if you
for example want to put objects on the faces of a geodesic shape. It
features among others:
   - center of mass of a triangle
   - centerpoint and radius of the inner circle of a triangle
   - centerpoint and radius of the outer circle of a triangle
   - surface normal of a triangle
   - area and circumference of a triangle
and 
   - objects for easy drawing of a vector arrow
   - objects to mark origin and orientation of a scene (good for
debugging)
   - primitives to orient an object parallel to a given direction


You can see examples either in povray/binaries/images or on my webpage:
http//www.geocities.com/SiliconValley/Lakes/5432/povray


            Uwe.

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