_m_o_d_e Specifies whether front- or back-facing facets are candidates for
culling. Symbolic constants GGGGLLLL____FFFFRRRROOOONNNNTTTT, GGGGLLLL____BBBBAAAACCCCKKKK, and
GGGGLLLL____FFFFRRRROOOONNNNTTTT____AAAANNNNDDDD____BBBBAAAACCCCKKKK are accepted. The initial value is GGGGLLLL____BBBBAAAACCCCKKKK.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
ggggllllCCCCuuuullllllllFFFFaaaacccceeee specifies whether front- or back-facing facets are culled (as
specified by _m_o_d_e) when facet culling is enabled. Facet culling is
initially disabled. To enable and disable facet culling, call the
ggggllllEEEEnnnnaaaabbbblllleeee and ggggllllDDDDiiiissssaaaabbbblllleeee commands with the argument GGGGLLLL____CCCCUUUULLLLLLLL____FFFFAAAACCCCEEEE. Facets
include triangles, quadrilaterals, polygons, and rectangles.
ggggllllFFFFrrrroooonnnnttttFFFFaaaacccceeee specifies which of the clockwise and counterclockwise facets
are front-facing and back-facing. See ggggllllFFFFrrrroooonnnnttttFFFFaaaacccceeee.
NNNNOOOOTTTTEEEESSSS
If _m_o_d_e is GGGGLLLL____FFFFRRRROOOONNNNTTTT____AAAANNNNDDDD____BBBBAAAACCCCKKKK, no facets are drawn, but other primitives
such as points and lines are drawn.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____EEEENNNNUUUUMMMM is generated if _m_o_d_e is not an accepted value.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllCCCCuuuullllllllFFFFaaaacccceeee is executed between the
execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ggggllllEEEEnnnndddd.