>
> Does anyone know of a source for existing code or macros for performing
> geometric tasks that are likely to crop up while modeling things in 3d?
>
> Circumscribing a circle around a triangle, finding the center of a sphere that
> includes that circle in its surface, finding a circle that is tangent to 3 other
> circles, etc.
>
> No doubt, I could code a few such algebraic solutions to geometric problems, but
> why reinvent the wheel, and there might be methods out there that use POV-Ray's
> bounding boxes and other features to speed up the process...
>
> Thanks!
>
>
  Take a look at the page of Friedrich A. Lohmueller, he wrote an 
analytical_g.inc file (macros for Analytical Geometry)
http://wwww.f-lohmueller.de


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