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/.