Speed up evaluation of NURBS curves by use of subdivision into Bezier segments

Открыто nikitronn запросил слияние bspline_speedup в master

Created by: portnov

Evaluation of Bezier curves is much faster than evaluation of generic NURBS curves. But, any NURBS curve can be split up into list of Bezier segments. For now, this is implemented for non-rational curves only. And anyway this has to be extensively tested.

Screenshot_20221026_224701

Preflight checklist

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  • Code changes complete.
  • Code documentation complete.
  • Documentation for users complete (or not required, if user never sees these changes).
  • Manual testing done.
  • Unit-tests implemented.
  • Ready for merge.