This enumeration defines face culling modes.
Values:
IG_VECT_CULLFACE_NONE | No facets are culled (both front and back facing faces are rendered). |
IG_VECT_CULLFACE_BACK | Back-facing facets are culled (only front-facing faces are rendered). |
IG_VECT_CULLFACE_FRONT | Front-facing facets are culled (only back-facing faces are rendered). |