I have a question about the NURBS algorithm implemented in Rhino and @DavidRutten recommended me to ask you.
I tried to create a simple quarter circle in Grasshopper using the NurbsCurve module, but I didn’t succeed. This simple example can be found in many books (e.g. The NURBS Book written by Piegl&Tiller):
we have three control points:
and the following knot vector:
Unfortunately I always get an error message from NurbsCurve, that it can’t calculate the curve.
Could you please tell me which NURBS algorithm is implemented in Rhino (e.g. deBoor) and how could I solve the problem?
I really appreciate any help you can provide.