Module section 

Section views: the part cut by a plane, with what lies on the side its normal points to taken away — by the kernel’s own boolean, subtracting a box standing on the plane from every solid.

Functions

cut_faces

The faces of faces lying in the plane through origin normal to normal: a section’s cut.

section_part

model with every solid cut by the plane through origin normal to the unit vector normal, the side normal points to taken away. A solid wholly on that side is gone; faces standing on their own are left whole.