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Chris, you sure make it look easy!
> Each torii segment starts with the tangent that the previous segment ended
> with, so the results certainly should be smooth. This continuation of
> tangents, however, can cause some rippling, like a sine wave along the
> spline.
I still don't understand what causes this. Look at this low-count version
(attached). I jumped to the conclusion that the ripples are caused by
having too few torus segments, and each ripple is one such segment. But,
they are regularly spaced, not bunched in the curved part. So that's not
it, is it?
When reading your tutorial, I had also assumed that the purpose of using the
torii was as a curve-fit for one segment, but now I don't understand how
that can be, since a torus only has one curve everywhere (making it
ellipitical, as I had been thinking, would distort the cross-section of the
pipe, too).
--John
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