Rebuild a curve with a specific number of control points.

Input parameters:

1. Cu → Curve to rebuild.
2. Pn → Number of control points for rebuilding.
3. Dg → Optional curve degree override.
4. Tn → Retain the tangents at the curve ends.
   •  True → Keep
   • False → Ignore

Output parameters:

1. Cr → Rebuilt curve.
2. Dv → Maximum deviation between the original and the rebuilt curve.