First time on this forum, so please be gentle.
Here's my problem. I load in a STEP model and I want to be able to evaluate derivatives on edges/surfaces of the geometry with respect to the B-spline or NURBS control points/poles. Is this possible?
I've looked through the BSpline class reference, and I know that it can evaluate derivatives at s or uv parameters, but that's not what I'm looking for. I would like the derivative of the xyz location at any given point on the curve/surface with respect to the control point/pole location.
Is there any such feature?
Thank you for your time,