I am having to use Extrusions created from Box object to build a frame. I need to be able to find the neighboring objects for a given extrusion, however, all the extrusions have 6 surfaces but only 5 distinct surface normals.
Sides whose surface normals are parallel to the box’s plane’s normal turns out to be co-directional. is this correct behaviour? if this is consistent behaviour then how can I create a cuboid with 6 anti-parallel sides?