GLGETCLIPPLANE() MachTen Programmer’s Manual GLGETCLIPPLANE()

NAME
glGetClipPlane - return the coefficients of the specified
clipping plane

C SPECIFICATION
void glGetClipPlane( GLenum plane,
GLdouble *equation )

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PARAMETERS
plane Specifies a clipping plane. The number of clip-
ping planes depends on the implementation, but
at least six clipping planes are supported.
They are identified by symbolic names of the
form GL_CLIP_PLANE$i$ where 0 <= $ i $ <
GL_MAX_CLIP_PLANES.

equation 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).

DESCRIPTION
glGetClipPlane returns in equation the four coefficients
of the plane equation for plane.

NOTES
It is always the case that GL_CLIP_PLANE$i$ =
GL_CLIP_PLANE0 + $i$.

If an error is generated, no change is made to the con-
tents of equation.

ERRORS
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 corre-
sponding execution of glEnd.