Create a curve through a sequence of points and tangents.

Input parameters:

1. Pt → Points to interpolate.
2. Tn → Tangent constraint for each point.
3. Bl → Blend factor for local control-point group sizing.
4. Mt → Fitting method to use.
   • 0 → Degree3
   • 1 → Degree5

Output parameters:

1. Cr → Interpolated curve with Nurbs degree 5.