Subroutine Purpose Specifies whether frontfacing or backfacing facets may be culled.
Parameters mode Specifies whether frontfacint or backfacing facets are candidates for culling.
Facets include triangles, quadrilaterals, polygons, and rectangles. The glFrontFace subroutine specifies which of the clockwise and counterclockwise facets are frontfacing and backfacing. The glEnable or glDisable subroutine, glFrontFace subroutine. OpenGL Overview .