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<STRONG>NAME</STRONG>
<STRONG>glGetClipPlane</STRONG> - return the coefficients of the specified
clipping plane
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
void <STRONG>glGetClipPlane</STRONG>( GLenum <EM>plane</EM>,
GLdouble *<EM>equation</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>plane</EM> 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
<STRONG>GL_CLIP_PLANE</STRONG>i where 0 <EM><</EM> i < <STRONG>GL_MAX_CLIP_PLANES</STRONG>.
<EM>equation</EM> Returns four double-precision values that are the
coefficients of the plane equation of <EM>plane</EM> in eye
coordinates. The initial value is (0, 0, 0, 0).
<STRONG>DESCRIPTION</STRONG>
<STRONG>glGetClipPlane</STRONG> returns in <EM>equation</EM> the four coefficients of
the plane equation for <EM>plane</EM>.
<STRONG>NOTES</STRONG>
It is always the case that <STRONG>GL_CLIP_PLANE</STRONG>i = <STRONG>GL_CLIP_PLANE0</STRONG> +
i.
If an error is generated, no change is made to the contents
of <EM>equation</EM>.
<STRONG>ERRORS</STRONG>
<STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>plane</EM> is not an accepted
value.
<STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetClipPlane</STRONG> is
executed between the execution of <STRONG>glBegin</STRONG> and the
corresponding execution of <STRONG>glEnd</STRONG>.
<STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
<STRONG>glClipPlane</STRONG>
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