zone.face.find.normal
Syntax
Note
3D zone faces (surfaces) <-> 2D zone edges (lines)
Get the face index of zone z whose outward-facing normal is closest to the direction of v.
i - the index of the face whose outward normal is closest to the direction of v (from 1 to 4 in 2D, from 1 to 6 in 3D)
z - a pointer to a zone
v - a vector indicating a direction. This need not be of unit length.
zone.face.find
zone.face.gp
9.1.13