Generates a closed polyline or spline around the boundary of a flat, closed area.
Generates a closed polyline or spline around the boundary of a planar closed area, a planar face of a 3D solid or around the area of a hatch pattern.
Select a planar enclosed point to generate a boundary by picking a point inside one of the following entities:
- Closed planar area
- Planar face on a 3D solid; to select the face of a 3D solid hold down the Ctrl key.
- Hatch pattern
The resulting boundary are:
- Polyline - when the boundary is polygonal (has corners, like a square)
- Spline - when the boundary is curved, like a spline.