gluLoadSamplingMatrices

GLULOADSAMPLINGMATRICES(3G)			  GLULOADSAMPLINGMATRICES(3G)



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(3G), gluNewNurbsRenderer(3G), gluNurbsProperty(3G)



						  GLULOADSAMPLINGMATRICES(3G)