Exercise: Extrude a profile
Open the file CrossSections.3dr.
This file contains a theoretical section as well as the neutral axis of a tunnel.
Show only Neutral axis and Theoretical section.
Select the Theoretical section and go to Profile along a Path. Click on the neutral axis. Unselect all the options and click Preview. The result is not as expected because the profile has moved along the path but it has not turned with the path (only translations). Select now the option Turn with the curve and click Preview again. A theoretical tunnel is now created as expected.
Note
Use the Profile base point to define the profile origin.
To fully manage the superelevation (or roll), you will have to define a Second path and a Profile lean point.
The option Close extremities will close the two holes at the beginning and at the end of the extruded mesh.
Extrusion along a path