CentOS 7.0 - man page for glgetclipplane (centos section 3G)
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GLGETCLIPPLANE(3G) OpenGL Manual GLGETCLIPPLANE(3G)
glGetClipPlane - return the coefficients of the specified clipping plane
void glGetClipPlane(GLenum plane, GLdouble * equation);
Specifies a clipping plane. The number of clipping planes depends on the
implementation, but at least six clipping planes are supported. They are identified by
symbolic names of the form GL_CLIP_PLANEi where i ranges from 0 to the value of
GL_MAX_CLIP_PLANES - 1.
Returns four double-precision values that are the coefficients of the plane equation
of plane in eye coordinates. The initial value is (0, 0, 0, 0).
glGetClipPlane returns in equation the four coefficients of the plane equation for plane.
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.
GL_INVALID_ENUM is generated if plane is not an accepted value.
GL_INVALID_OPERATION is generated if glGetClipPlane is executed between the execution of
glBegin() and the corresponding execution of glEnd().
Copyright (C) 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/.
opengl.org 06/10/2014 GLGETCLIPPLANE(3G)
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