How to extrude curve normal to surface without using _Fin command

Hello.
I need to reproduce in python the command that extrudes curve normal to surface without using _Fin command.

The sample script in python using _Fin command:

import rhinoscriptsyntax as rs

import scriptcontext as sc
import Rhino.Geometry as rg

def RunCommand( is_interactive ):
  curve = rs.GetCurveObject("Select curve")
  surface = rs.GetObject("Select surface")
  if curve and surface:
    rs.Command('-_Fin _SelID {} _SelID {} _Direction=Normal {} _Enter _BothSides=Yes _Enter'.format(curve[0], surface, 500), True)

RunCommand(True)

Screenshot 2022-02-15 202804
Screenshot 2022-02-15 202717

Hi @Alexandru_Bichis,

You might start with Curve.OffsetNormalToSurface.

ā€“ Dale

Hello Dale,

Thank you very much.