Add B-Spline/ NURBS visualization capability.

From a user voice request.

Please add a feature in order to be able to directly visualize NURBS --no discretization necessary!. NURBS is already a standard in computer graphics and the future of FEA (isogeometric analysis).

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FYI @florian360

Writing geometry, vertex, and fragment shaders to render trimmed NURBS would be fun but a ton of work. Adding scalar interpolation on top would also be a fair amount of work. Ensuring picking worked would be a fair amount of work. Let me know if you find funding to work on it. :slight_smile: