T - Commands	T - Commands
TO_SPLINE (command)
Overview   Operations   Commands

It rounds a polyline converting it to a Spline    Pro

  Menu : Modify  Polylines operations...  Polyline: convert to Spline

 Command line: TO_SPLINE

Select the polylines to be converted in Spline, then press Enter to confirm or Esc to delete.... select the objects

If some polyline is closed you will be prompted to round or not the closing point. If the polyline for example is an airfoil, you want to keep the closing point (the tail) sharped.

Each vertex of the polyiline will be converted to a control point of the Spline

The result of the operation will be displayed