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Curve Control Points
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Get the control-points, weights and knots of a NURBS curve.

Input parameters:

  1. Cr → Curve to analyse.

Output parameters:

  1. Cp → Curve control points.
  2. Cw → Weights of control points.
  3. Kn → Curve knot vector. Knots indicate where along the curve the span transitions occur from one piece to the next.
  4. Dg → Curve degree. Always equal to the number of control points, minus the number of knots, plus one.