Mesh TrimByPlane

Description
The Mesh TrimByPlane command trims faces and parts of faces on one side of a plane from a mesh object.

Usage

 * 1) Select a single mesh object and a single Part plane. The (extended) plane should intersect the mesh object.
 * 2) Select the  option from the menu.
 * 3) The  dialog box opens.
 * 4) Select the side you want to keep by pressing one of the buttons.
 * 5) Pressing the  button removes the faces and parts of faces above the plane, and creates a new mesh object containing them.