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Create closes/periodic edge from points

Marco's picture


I habe a lot of points which describe a contour. Now I need to get a wire from the point list.

GeomAPI_PointsToBSpline toBSpline(const PointVec& points)
TColgp_Array1OfPnt arr(0,points.size()-1);
for(unsigned int i = 0;i {

auto spline = GeomAPI_PointsToBSpline(arr);

return spline;

OpenCascades creates the curve (testet it with the step export). My problem is the connection between last and first point. There I have a big failure. You can see it in the attached picture. Seems that I do something wrong the make the spline periodic.
I also tested GeomAPI_Interpolate, but there a runtime error occurs.
So, what did I wrong?

Best regards


Marco's picture

Any ideas? :/

Pawel's picture

Hello Marco,

can't say what the exact reason is but I would try the following out:
- change the tolerance in GeomAPI_PointsToBSpline
- change the min/max degree of the spline to create