Labels Milestones
BackNormal -0.422682 0.361949 0.830862 vertex 4.83932 -5.54554 6.98393 facet normal 0.964172 0.255778 -0.0703594 vertex -3.81128 9.2209 0.0387391 vertex -3.7728 -9.36311 0.0491304 facet normal.
- Normal -0.00473867 -0.0788046 -0.996879 facet.
- App note 93 (https://www.catagle.com/45-2/PDF_AN93.htm Bourns.