In article <3d2bca3e$1@news.povray.org> , "Majukatur" 
<maj### [at] hotmailcom> wrote:

> Well, this object not is a mesh of triangles, is a curve defined by 3 points
> and its normal vectors, it is not an aproximation. There is an equation that
> have all this characteristics, not is a mesh of triangles, is a mesh of
> patchs, and it is easy to write this kind of meshes MANUALLY, for example,
> you need only 4 "triangles" to describe an sphere, with normal meshes you
> need hundreds of triangles. For describe ANY ellipse you need only 12
> "triangles".

Why build a sphere out of triangles if you can just use the sphere object in
POV-Ray?  Sounds like reinventing the wheel to me...

    Thorsten

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