fglGetClipPlane(3G)

NAME
     fglGetClipPlane - return the coefficients of the specified clipping plane


FORTRAN SPECIFICATION
     SUBROUTINE fglGetClipPlane( INTEGER*4 plane,
                                 CHARACTER*8 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
     fglGetClipPlane 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 fglGetClipPlane is executed between
     the execution of fglBegin and the corresponding execution of fglEnd.


SEE ALSO
     fglClipPlane