glCullFace - specify whether front- or back-facing facets can be culled
void glCullFace(GLenum mode);
Specifies whether front- or back-facing facets are
candidates for culling. Symbolic constants GL_FRONT, GL_BACK,
and GL_FRONT_AND_BACK are accepted. The initial value is
glCullFace specifies whether front- or back-facing facets are culled (as
specified by mode) when facet culling is enabled. Facet culling is
initially disabled. To enable and disable facet culling, call the
glDisable commands with the argument GL_CULL_FACE.
Facets include triangles, quadrilaterals, polygons, and rectangles.
glFrontFace() specifies which of the clockwise and
counterclockwise facets are front-facing and back-facing. See
If mode is GL_FRONT_AND_BACK, no facets are drawn, but other
primitives such as points and lines are drawn.
GL_INVALID_ENUM is generated if mode is not an accepted value.
glIsEnabled() with argument GL_CULL_FACE
glGet() with argument GL_CULL_FACE_MODE
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