scott wrote:
> I don't understand the fascination with perfect mathematically described 
> surfaces, they are inflexible and slow to render.  If you use 
> sub-divided triangle meshes you can make the output perfectly smooth all 
> the time and of course do whatever transformations you like very easily 
> by just transforming every vertex.

True, as long as you dynamically adjust the subdivision level so that 
triangles aren't too large.  Unfortunately, nobody actually does that. 
In reality, everyone pre-subdivides the meshes.

Mathematically described surfaces don't have to be subdivided, because 
they're rendered at the pixel level.

...Chambers

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