glGetClipPlane(3G)	       OpenGL Reference		    glGetClipPlane(3G)

NAME    [Toc]    [Back]

     glGetClipPlane - return the coefficients of the specified clipping	plane

C SPECIFICATION    [Toc]    [Back]

     void glGetClipPlane( GLenum plane,
			  GLdouble *equation )

PARAMETERS    [Toc]    [Back]

     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    [Toc]    [Back]

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

NOTES    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     glClipPlane


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