glCullFace - specify whether front- or back-facing facets can be culled
void glCullFace(GLenum mode);
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 glEnable() and 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 glFrontFace().
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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