2003-2004 Silicon Graphics, Inc.
glGetClipPlane 3G
glGetClipPlane glGetClipPlanef glGetClipPlanex return the coefficients of the specified clipping plane

## C Specification

void `glGetClipPlanef` GLenum plane GLfloat *equation void `glGetClipPlanex` GLenum plane GLfixed *equation

## Parameters

plane

  Specifies a clipping plane. The number of clipping planes depends on the implementation, but at least six clipping planes are supported. Symbolic names of the form `GL_CLIP_PLANE` i, where i is an integer between 0 and `GL_MAX_CLIP_PLANES` -1 , are accepted.

equation

  Returns four fixed-point or floating-point values that are the coefficients of the plane equation of plane in eye coordinates in the order p1, p2, p3, and p4. The initial value is (0, 0, 0, 0).

## Description

`glGetClipPlane` returns in equation the four coefficients of the plane equation for plane. The coefficients are in eye coordinates and are returned in the order p1, p2, p3, and p4.

## Notes

It is always the case that GL_CLIP_PLANEi = GL_CLIP_PLANE0 + `i` .

If an error is generated, no change is made to the contents of equation.

## Errors

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

## See Also

glClipPlane

## Copyright

Copyright 2003-2004 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.