> If I'm interpreting the bottom part of p.624 and the top of p.625 in that
> paper correctly, we cannot assume this property holds for general NURBS or
> B-Spline surfaces (intuitively I wouldn't expect it to) but if the paper is
> correct we *can* assume this is true for Bezier patches. Therefore, if the
> NURBS surface in question is converted to a set of Bezier patches via knot
> insertion or knot refinement the test may be possible for the resulting
> Bezier patches. Of course, the challenge is then to take that information
> and relate it back to the NURBS surfaces, since multiple patches will
> potentially need to be "stitched" into the final NURBS overlap boundary curve.
Yes, you are right. The current idea is to get the boundaries of the continuous
patches (e.g. Bezier patches), use curve-surface intersections to find the
overlap curve, and finally stitch them together. (Maybe ON_NurbsCurve::Append()
can stitch two NURBS curves together if they share an end point?)
Cheers!
Wu
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