> won't be able to modify it to "degree 3" as they call it when there's
> four control points per side. So if you have any success at implementing
> the version with 4 control points, it would be great. I really
> appreciate your efforts!

Ok, I have worked futher through the paper. I have a version with 3 sides 
and degree 3 working now and could provide higher degrees but I don't think 
this would be useful (or?). I used formulas 3.1-3.5 for m=3. I am not sure 
about the 'normalisation property' (2.5). As far as I see my current 
implementation does not hold this. (what will this have for consequences?)

I have added support for generating smooth triangles. I think this shape 
could be used for subdividing smooth triangles. Can you tell me what the 
conditions are for joining triangluar patches smootly?

Please test the macros and try to join some patchs smootly.

- Micha

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