The Segment/Trim Surface option allows you to segment a selected CAD surface by a Bspline curve. The selected curve must lie on the surface, and must form an enclosed loop if it is fully contained within the surface boundaries. Surfaces can be segmented by the following four options.
By Curves
Select the curve(s) to segment the selected surface.
By Plane
Specify a plane by defining three points on the plane, or by a vector normal to the plane and a point that the plane passes through. The surface will be segmented by this plane.
By Connectivity
Segments surfaces that are merged by definition but not physically connected.
Note: This option applies only to faceted data.
By Angle
Splits the surface by the value of the angle prescribed.
Note: This option applies only to faceted data.