#Face Normal.
>> What is the formula for calculating the normal for a 3D face?
Or; is there a way to select faces based on the direction of their
normals?
If not I hope to make a script to do just that. <<
Well, you can download my code chunk that calculates face normals with TSE
(it's in section 18), or you can download the script that selects faces based
on the direction of normals (see the previous reply).
– Dan / n-Space, Inc.