Path Sweep
Sweep (or extrude) geometry along a path.
The sweep path may be any part that consists of only free edges and curves that
form a joined, non-overlapping path.
Figure 1. A polygon and fitted spline (on the left) and the polygon swept along the fitted spline (on the right).
Figure 1. A polygon and fitted spline (on the left) and the polygon swept along the fitted spline (on the right).