hex_faceindex

int  hex_faceindex(int faceno, int vtxno)

Returns -1 if an invalid number is specified.

Returns 0 to 7 to refer to the eight vertices of a generic hexahedron.

faceno

The face on the hexahedron. Ranges from 0 to 5.

vtxno

Which vertex on the quadrilateral to return, 0 to 3. Starts with the lowest number and follows Houdini’s winding convention.