SGI SI GLU library

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diff --git a/src/glu/sgi/libnurbs/internals/patch.h b/src/glu/sgi/libnurbs/internals/patch.h
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+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+*/
+
+/*
+ * patch.h
+ *
+ * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+ * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/patch.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
+ */
+
+#ifndef __glupatch_h_
+#define __glupatch_h_
+
+#include "types.h"
+#include "defines.h"
+
+class Quilt;
+class Mapdesc;
+
+
+struct Pspec {
+    REAL		range[3];
+    REAL		sidestep[2];
+    REAL		stepsize;
+    REAL		minstepsize;
+    int			needsSubdivision;
+};
+
+struct Patchspec : public Pspec {
+    int			order;
+    int			stride;
+    void 		clamp( REAL );
+    void 		getstepsize( REAL );
+    void		singleStep( void );    
+};
+
+class Patch {
+public:
+friend class Subdivider;
+friend class Quilt;
+friend class Patchlist;
+    			Patch( Quilt *, REAL*, REAL *, Patch * );
+    			Patch( Patch &, int, REAL, Patch * );
+    void		bbox( void );
+    void		clamp( void );
+    void		getstepsize( void );
+    int			cullCheck( void );
+    int			needsSubdivision( int );
+    int			needsSamplingSubdivision( void );
+    int			needsNonSamplingSubdivision( void );
+
+    int                 get_uorder() {return pspec[0].order;}
+    int                 get_vorder() {return pspec[1].order;}
+
+private:
+
+    Mapdesc*		mapdesc;
+    Patch*		next;
+    int			cullval;
+    int			notInBbox;
+    int			needsSampling;
+    REAL		cpts[MAXORDER*MAXORDER*MAXCOORDS]; //culling pts 
+    REAL		spts[MAXORDER*MAXORDER*MAXCOORDS]; //sampling pts 
+    REAL		bpts[MAXORDER*MAXORDER*MAXCOORDS]; //bbox pts
+    Patchspec		pspec[2];
+    void 		checkBboxConstraint( void );
+    REAL 		bb[2][MAXCOORDS];
+};
+#endif /* __glupatch_h_ */