Trimming B-Spline surface with a BSpline curve

Hi everyone,
I have had a b-spline surface approximated from an array of points, and a B-Spline curve lie inside and on this surface, but not exactly since I also approximate this B-Spline curve in an independent way from B-Spline surface. Now I need to exact the region inside the B-spline curve. I checked the function "face" in the Geometry samples, but it only trim a B-Spline surface from a wire customized in parametric space; while in my problems, bot curve and surface is in difference parametric space.
Hope to see your answer.
Thanks in advance.

Mauro Mariotti's picture

You need to project your 3d curve on the face, to have a 2d curve in the parameter space.