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+_C_ License Applicability. Except to the extent portions of this file are
+_C_ made subject to an alternative license as permitted in the SGI Free
+_C_ Software License B, Version 1.1 (the "License"), the contents of this
+_C_ file are subject only to the provisions of the License. You may not use
+_C_ this file except in compliance with the License. You may obtain a copy
+_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+_C_ 
+_C_ http://oss.sgi.com/projects/FreeB
+_C_ 
+_C_ Note that, as provided in the License, the Software is distributed on an
+_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+_C_ 
+_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
+_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+_C_ Copyright in any portions created by third parties is as indicated
+_C_ elsewhere herein. All Rights Reserved.
+_C_ 
+_C_ Additional Notice Provisions: The application programming interfaces
+_C_ established by SGI in conjunction with the Original Code are The
+_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
+_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
+_C_ published by SGI, but has not been independently verified as being
+_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
+_C_
+_C_ $Date: 2004/03/14 08:29:09 $ $Revision: 1.1.1.4 $
+_C_ The first character in this file must be an '_'!
+_C_ Anything on a line after _C_ is ignored
+_define(_filters,eqn)_C_
+_C_      eqn is automatically replaced with neqn for nroff
+_header(LoadSamplingMatrices, load NURBS sampling and culling matrices)
+_names(LoadSamplingMatrices)
+.EQ
+delim $$
+.EN
+.SH PARAMETERS
+_phead(_param1)
+Specifies the NURBS object (created with _cmnd(NewNurbsRenderer)).
+_phead(_param2)
+Specifies a modelview matrix (as from a _glcmnd(GetFloatv) call).
+_phead(_param3)
+Specifies a projection matrix (as from a _glcmnd(GetFloatv) call).
+_phead(_param4)
+Specifies a viewport (as from a _glcmnd(GetIntegerv) call).
+.SH DESCRIPTION
+_cmnd uses _param2, _param3, and _param4 to recompute the sampling and culling 
+matrices stored in _param1.
+The sampling matrix determines how finely a NURBS curve or surface
+must be tessellated to satisfy the sampling tolerance (as determined by the
+_gluconst(SAMPLING_TOLERANCE) property).
+The culling matrix is used in deciding if a NURBS curve or surface
+should be culled before 
+rendering (when the _gluconst(CULLING) property is turned on).
+.P
+_cmnd is necessary only if the _gluconst(AUTO_LOAD_MATRIX) property is turned
+off (see _cmnd(NurbsProperty)).
+Although it can be convenient to leave the _gluconst(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.)
+.SH SEE ALSO
+_cmnd(GetNurbsProperty),
+_cmnd(NewNurbsRenderer),
+_cmnd(NurbsProperty)