SGI SI GLU library

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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.
+*/
+
+/*
+ * reader.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/reader.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
+ */
+
+#ifndef __glureader_h_
+#define __glureader_h_
+
+#include "bufpool.h"
+#include "types.h"
+
+enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
+    
+struct Property;
+struct O_surface;
+struct O_nurbssurface;
+struct O_trim;
+struct O_pwlcurve;
+struct O_nurbscurve;
+struct O_curve;
+class  Quilt;
+class TrimVertex;
+
+
+struct O_curve : public PooledObj {
+    union {
+        O_nurbscurve	*o_nurbscurve;
+        O_pwlcurve	*o_pwlcurve;
+    } curve;
+    Curvetype		curvetype;	/* arc type: pwl or nurbs	*/
+    O_curve *		next;		/* next arc in loop		*/
+    O_surface *		owner;		/* owning surface		*/
+    int			used;		/* curve called in cur surf	*/
+    int			save;		/* 1 if in display list		*/
+    long		nuid;
+    			O_curve() { next = 0; used = 0; owner = 0; 
+				    curve.o_pwlcurve = 0; }
+    };
+
+struct O_nurbscurve : public PooledObj {
+    Quilt		*bezier_curves;	/* array of bezier curves	*/
+    long		type;		/* range descriptor		*/
+    REAL		tesselation;	/* tesselation tolerance 	*/
+    int			method;		/* tesselation method 		*/
+    O_nurbscurve *	next;		/* next curve in list		*/
+    int			used;		/* curve called in cur surf	*/
+    int			save;		/* 1 if in display list		*/
+    O_curve *		owner;		/* owning curve 		*/
+			O_nurbscurve( long _type ) 
+			   { type = _type; owner = 0; next = 0; used = 0; }
+    };
+ 
+class O_pwlcurve : public PooledObj {
+public:
+    TrimVertex		*pts;		/* array of trim vertices	*/
+    int			npts;		/* number of trim vertices	*/
+    O_pwlcurve *	next;		/* next curve in list		*/
+    int			used;		/* curve called in cur surf	*/
+    int			save;		/* 1 if in display list		*/
+    O_curve *		owner;		/* owning curve 		*/
+			O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
+    };
+
+struct O_trim : public PooledObj {
+    O_curve		*o_curve;	/* closed trim loop	 	*/
+    O_trim *		next;		/* next loop along trim 	*/
+    int			save;		/* 1 if in display list		*/
+			O_trim() { next = 0; o_curve = 0; }
+    };
+
+struct O_nurbssurface : public PooledObj {
+    Quilt *		bezier_patches;/* array of bezier patches	*/
+    long		type;		/* range descriptor		*/
+    O_surface *		owner;		/* owning surface		*/
+    O_nurbssurface *	next;		/* next surface in chain	*/
+    int			save;		/* 1 if in display list		*/
+    int			used;		/* 1 if prev called in block	*/
+			O_nurbssurface( long _type ) 
+			   { type = _type; owner = 0; next = 0; used = 0; }
+    };
+
+struct O_surface : public PooledObj {
+    O_nurbssurface *	o_nurbssurface;	/* linked list of surfaces	*/
+    O_trim *		o_trim;		/* list of trim loops		*/
+    int			save;		/* 1 if in display list		*/
+    long		nuid;
+			O_surface() { o_trim = 0; o_nurbssurface = 0; }
+    };
+
+struct Property : public PooledObj {
+    long		type;
+    long		tag;
+    REAL		value;
+    int			save;		/* 1 if in display list		*/
+			Property( long _type, long _tag, INREAL _value )
+			{ type = _type; tag = _tag; value = (REAL) _value; }
+			Property( long _tag, INREAL _value )
+			{ type = 0; tag = _tag; value = (REAL) _value; }
+    };
+
+class NurbsTessellator;
+#endif /* __glureader_h_ */