1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31/*
32 * reader.h
33 *
34 */
35
36#ifndef __glureader_h_
37#define __glureader_h_
38
39#include "bufpool.h"
40#include "types.h"
41
42enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
43
44struct Property;
45struct O_surface;
46struct O_nurbssurface;
47struct O_trim;
48class O_pwlcurve;
49struct O_nurbscurve;
50struct O_curve;
51class  Quilt;
52class TrimVertex;
53
54
55struct O_curve : public PooledObj {
56    union {
57        O_nurbscurve	*o_nurbscurve;
58        O_pwlcurve	*o_pwlcurve;
59    } curve;
60    Curvetype		curvetype;	/* arc type: pwl or nurbs	*/
61    O_curve *		next;		/* next arc in loop		*/
62    O_surface *		owner;		/* owning surface		*/
63    int			used;		/* curve called in cur surf	*/
64    int			save;		/* 1 if in display list		*/
65    long		nuid;
66    			O_curve() { next = 0; used = 0; owner = 0;
67				    curve.o_pwlcurve = 0; curvetype = ct_none; save = 0; nuid = 0; }
68    };
69
70struct O_nurbscurve : public PooledObj {
71    Quilt		*bezier_curves;	/* array of bezier curves	*/
72    long		type;		/* range descriptor		*/
73    REAL		tesselation;	/* tesselation tolerance 	*/
74    int			method;		/* tesselation method 		*/
75    O_nurbscurve *	next;		/* next curve in list		*/
76    int			used;		/* curve called in cur surf	*/
77    int			save;		/* 1 if in display list		*/
78    O_curve *		owner;		/* owning curve 		*/
79			O_nurbscurve( long _type )
80			   { bezier_curves = 0; type = _type; tesselation = 0; method = 0; next = 0; used = 0; save = 0; owner = 0; }
81    };
82
83class O_pwlcurve : public PooledObj {
84public:
85    TrimVertex		*pts;		/* array of trim vertices	*/
86    int			npts;		/* number of trim vertices	*/
87    O_pwlcurve *	next;		/* next curve in list		*/
88    int			used;		/* curve called in cur surf	*/
89    int			save;		/* 1 if in display list		*/
90    O_curve *		owner;		/* owning curve 		*/
91			O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
92    };
93
94struct O_trim : public PooledObj {
95    O_curve		*o_curve;	/* closed trim loop	 	*/
96    O_trim *		next;		/* next loop along trim 	*/
97    int			save;		/* 1 if in display list		*/
98			O_trim() { next = 0; o_curve = 0; save = 0; }
99    };
100
101struct O_nurbssurface : public PooledObj {
102    Quilt *		bezier_patches;/* array of bezier patches	*/
103    long		type;		/* range descriptor		*/
104    O_surface *		owner;		/* owning surface		*/
105    O_nurbssurface *	next;		/* next surface in chain	*/
106    int			save;		/* 1 if in display list		*/
107    int			used;		/* 1 if prev called in block	*/
108			O_nurbssurface( long _type )
109			   { bezier_patches = 0; type = _type; owner = 0; next = 0; save = 0; used = 0; }
110    };
111
112struct O_surface : public PooledObj {
113    O_nurbssurface *	o_nurbssurface;	/* linked list of surfaces	*/
114    O_trim *		o_trim;		/* list of trim loops		*/
115    int			save;		/* 1 if in display list		*/
116    long		nuid;
117			O_surface() { o_trim = 0; o_nurbssurface = 0; save = 0; nuid = 0; }
118    };
119
120struct Property : public PooledObj {
121    long		type;
122    long		tag;
123    REAL		value;
124    int			save;		/* 1 if in display list		*/
125			Property( long _type, long _tag, INREAL _value )
126			{ type = _type; tag = _tag; value = (REAL) _value; save = 0; }
127			Property( long _tag, INREAL _value )
128			{ type = 0; tag = _tag; value = (REAL) _value; save = 0; }
129    };
130
131class NurbsTessellator;
132#endif /* __glureader_h_ */
133