src/glu/sgi/libnurbs/internals/reader.h

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 */
  34
  35 /*
  36  * reader.h
  37  *
  38  */
  39
  40 #ifndef __glureader_h_
  41 #define __glureader_h_
  42
  43 #include "bufpool.h"
  44 #include "types.h"
  45
  46 enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
  47
  48 struct Property;
  49 struct O_surface;
  50 struct O_nurbssurface;
  51 struct O_trim;
  52 class O_pwlcurve;
  53 struct O_nurbscurve;
  54 struct O_curve;
  55 class  Quilt;
  56 class TrimVertex;
  57
  58
  59 struct O_curve : public PooledObj {
  60     union {
  61         O_nurbscurve    *o_nurbscurve;
  62         O_pwlcurve      *o_pwlcurve;
  63     } curve;
  64     Curvetype           curvetype;      /* arc type: pwl or nurbs       */
  65     O_curve *           next;           /* next arc in loop             */
  66     O_surface *         owner;          /* owning surface               */
  67     int                 used;           /* curve called in cur surf     */
  68     int                 save;           /* 1 if in display list         */
  69     long                nuid;
  70                         O_curve() { next = 0; used = 0; owner = 0;
  71                                     curve.o_pwlcurve = 0; }
  72     };
  73
  74 struct O_nurbscurve : public PooledObj {
  75     Quilt               *bezier_curves; /* array of bezier curves       */
  76     long                type;           /* range descriptor             */
  77     REAL                tesselation;    /* tesselation tolerance        */
  78     int                 method;         /* tesselation method           */
  79     O_nurbscurve *      next;           /* next curve in list           */
  80     int                 used;           /* curve called in cur surf     */
  81     int                 save;           /* 1 if in display list         */
  82     O_curve *           owner;          /* owning curve                 */
  83                         O_nurbscurve( long _type )
  84                            { type = _type; owner = 0; next = 0; used = 0; }
  85     };
  86
  87 class O_pwlcurve : public PooledObj {
  88 public:
  89     TrimVertex          *pts;           /* array of trim vertices       */
  90     int                 npts;           /* number of trim vertices      */
  91     O_pwlcurve *        next;           /* next curve in list           */
  92     int                 used;           /* curve called in cur surf     */
  93     int                 save;           /* 1 if in display list         */
  94     O_curve *           owner;          /* owning curve                 */
  95                         O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
  96     };
  97
  98 struct O_trim : public PooledObj {
  99     O_curve             *o_curve;       /* closed trim loop             */
 100     O_trim *            next;           /* next loop along trim         */
 101     int                 save;           /* 1 if in display list         */
 102                         O_trim() { next = 0; o_curve = 0; }
 103     };
 104
 105 struct O_nurbssurface : public PooledObj {
 106     Quilt *             bezier_patches;/* array of bezier patches       */
 107     long                type;           /* range descriptor             */
 108     O_surface *         owner;          /* owning surface               */
 109     O_nurbssurface *    next;           /* next surface in chain        */
 110     int                 save;           /* 1 if in display list         */
 111     int                 used;           /* 1 if prev called in block    */
 112                         O_nurbssurface( long _type )
 113                            { type = _type; owner = 0; next = 0; used = 0; }
 114     };
 115
 116 struct O_surface : public PooledObj {
 117     O_nurbssurface *    o_nurbssurface; /* linked list of surfaces      */
 118     O_trim *            o_trim;         /* list of trim loops           */
 119     int                 save;           /* 1 if in display list         */
 120     long                nuid;
 121                         O_surface() { o_trim = 0; o_nurbssurface = 0; }
 122     };
 123
 124 struct Property : public PooledObj {
 125     long                type;
 126     long                tag;
 127     REAL                value;
 128     int                 save;           /* 1 if in display list         */
 129                         Property( long _type, long _tag, INREAL _value )
 130                         { type = _type; tag = _tag; value = (REAL) _value; }
 131                         Property( long _tag, INREAL _value )
 132                         { type = 0; tag = _tag; value = (REAL) _value; }
 133     };
 134
 135 class NurbsTessellator;
 136 #endif /* __glureader_h_ */