redhat man page for glgetclipplane

GLGETCLIPPLANE(3G)														GLGETCLIPPLANE(3G)

NAME
       glGetClipPlane - return the coefficients of the specified clipping plane

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

PARAMETERS
       plane	 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 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_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.

       GL_INVALID_OPERATION is generated if glGetClipPlane is executed between the execution of glBegin and the corresponding execution of glEnd.

SEE ALSO
       glClipPlane(3G)

																GLGETCLIPPLANE(3G)