1991-2006 Silicon Graphics, Inc.
glCullFace 3G
glCullFace specify whether front- or back-facing facets can be culled

## C Specification

void `glCullFace` GLenum mode

## Parameters

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 `GL_BACK`.

## Description

`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.

## Notes

If mode is `GL_FRONT_AND_BACK`, no facets are drawn, but other primitives such as points and lines are drawn.

## Errors

`GL_INVALID_ENUM` is generated if mode is not an accepted value.

`GL_INVALID_OPERATION` is generated if `glCullFace` is executed between the execution of glBegin and the corresponding execution of glEnd.

## Associated Gets

glIsEnabled with argument `GL_CULL_FACE`

glGet with argument `GL_CULL_FACE_MODE`

## See Also

glEnable, glFrontFace

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.