I know it’s possible to use curve tools to convert a curve to a mesh, and even back into a curve again, but I can’t find any way to turn a bunch of points duplicated from a mesh into a curve.
What I’m trying to do is have a railway line run on a landscape. I’d like to extrude the profiles of the rails along a curve that clings to the ground-mesh, and I could do that with a minimum of difficulty if I couldmake my curve from points duplicated out of the mesh…if that makes it any clearer…