NAME
	  gluLoadSamplingMatrices - load NURBS sampling	and culling
	  matrices


     C SPECIFICATION
	  void gluLoadSamplingMatrices(	GLUnurbs* nurb,
					const GLfloat *model,
					const GLfloat *perspective,
					const GLint *view )


     PARAMETERS
	  nurb	       Specifies the NURBS object (created with
		       gluNewNurbsRenderer).

	  model	       Specifies a modelview matrix (as	from a
		       glGetFloatv call).

	  perspective  Specifies a projection matrix (as from a
		       glGetFloatv call).

	  view	       Specifies a viewport (as	from a glGetIntegerv
		       call).

     DESCRIPTION
	  gluLoadSamplingMatrices uses model, perspective, and view to
	  recompute the	sampling and culling matrices stored in	nurb.
	  The sampling matrix determines how finely a NURBS curve or
	  surface must be tessellated to satisfy the sampling
	  tolerance (as	determined by the GLU_SAMPLING_TOLERANCE
	  property).  The culling matrix is used in deciding if	a
	  NURBS	curve or surface should	be culled before rendering
	  (when	the GLU_CULLING	property is turned on).

	  gluLoadSamplingMatrices is necessary only if the
	  GLU_AUTO_LOAD_MATRIX property	is turned off (see
	  gluNurbsProperty).  Although it can be convenient to leave
	  the GLU_AUTO_LOAD_MATRIX property turned on, there can be a
	  performance penalty for doing	so.  (A	round trip to the GL
	  server is needed to fetch the	current	values of the
	  modelview matrix, projection matrix, and viewport.)

     SEE ALSO
	  gluGetNurbsProperty, gluNewNurbsRenderer, gluNurbsProperty