Mesh PolyTrim

Description
The Mesh PolyTrim command trims faces and parts of faces from mesh objects.

Usage

 * 1) During the command the 3D view cannot be changed. It is advisable to properly line up the 3d view first.
 * 2) Select one or more mesh objects.
 * 3) Select the  option from the menu.
 * 4) Define a polygon by picking points in the 3D view.
 * 5) Select an option from the 3D view context menu:
 * : removes the faces and parts of faces that are inside the polygon.
 * : removes the faces and parts of faces that are outside the polygon.
 * : removes the faces and parts of faces that are outside the polygon, and creates a new mesh object containing them.
 * : cancels the command.