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Correct trimming contour for degenerated NURBS surface.

Alexander Alexanov's picture


I have a problem to make correct trimming contour for degenerated NURBS surface - surface patch has only three boundaries. When I import IGES file with this patch to Rhino it looks like line of equal parameter not comes to boundary (see attached picture).  Trimming contour consist of wire from 3D Nurbs curves. It is perfectly works in case of four boundaries. Any ideas what is a best practice for that case?


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