Arch CutPlane/it

Description
The Cut Plane tool allows you to cut an Arch object according to a plan:
 * You can cut an Arch object with the selected face, normal or opposite of the face plan.
 * This add a substraction component CutVolume to the Arch object



In the above image, two Arch Structure are cut with respective plane.

How to use

 * 1) Select the object to be cut, then the face (the face must be the last one you selected)
 * 2) Press the  button
 * 3) Choose if the object is cut behind the normale face or front of the normale face
 * 4) Click the Ok button

Scripting
The Add tool can by used in macros and from the python console by using the following function:
 * archObject is the object to cut
 * face is the face of an object that come the plan from
 * faceSide is the side of the face to cut. 0 = Behind, 1 = Front