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On Wed, 26 May 2004 05:24:11 -0400, "David Wallace" <dar### [at] earthlink net>
wrote:
> Sorry, generating meshes from splines is not trivial, especially when you
> have a parametric surface with u = "clock value" and v going around the
> spline.
I'm not sure I understand you. If u=clock then it is constant per scene (if it
is clock of animation). If you mean u=clock as being parameter of the spline
then most probably you mean different spline as for v parameter.
> The issue comes from finding a consistent "normal" vector to the
> spline to start the mesh circle.
If the spline is closed then finding normal at the end is equally difficult on
start/end as in the middle. Just input for calculating it changes, but
algorithm is the same. I coded it a few times and I'm pretty sure it was done
similar way in http://members.home.nl/seedseven/#param and
http://members.home.nl/seedseven/#lathe as well. Of course those are not
perfect solution but non approximation if perfect.
ABX
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