dll/opengl/glu32/src/libnurbs/internals/reader.h

   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
  42 enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
  43
  44 struct Property;
  45 struct O_surface;
  46 struct O_nurbssurface;
  47 struct O_trim;
  48 class O_pwlcurve;
  49 struct O_nurbscurve;
  50 struct O_curve;
  51 class  Quilt;
  52 class TrimVertex;
  53
  54
  55 struct 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
  70 struct 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
  83 class O_pwlcurve : public PooledObj {
  84 public:
  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
  94 struct 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
 101 struct 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
 112 struct 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
 120 struct 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
 131 class NurbsTessellator;
 132 #endif /* __glureader_h_ */