src/glu/sgi/libnurbs/internals/nurbstess.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  * nurbstess.h
  33  *
  34  */
  35
  36 #ifndef __glunurbstess_h_
  37 #define __glunurbstess_h_
  38
  39 #include "mysetjmp.h"
  40 #include "subdivider.h"
  41 #include "renderhints.h"
  42 #include "backend.h"
  43 #include "maplist.h"
  44 #include "reader.h"
  45 #include "nurbsconsts.h"
  46
  47 struct Knotvector;
  48 class Quilt;
  49 class DisplayList;
  50 class BasicCurveEvaluator;
  51 class BasicSurfaceEvaluator;
  52
  53 class NurbsTessellator {
  54 public:
  55                         NurbsTessellator( BasicCurveEvaluator &c,
  56                                           BasicSurfaceEvaluator &e );
  57                         virtual ~NurbsTessellator( void );
  58
  59     void                getnurbsproperty( long, INREAL * );
  60     void                getnurbsproperty( long, long, INREAL * );
  61     void                setnurbsproperty( long, INREAL );
  62     void                setnurbsproperty( long, long, INREAL );
  63     void                setnurbsproperty( long, long, INREAL * );
  64     void                setnurbsproperty( long, long, INREAL *, long, long );
  65
  66     // called before a tessellation begins/ends
  67     virtual void        bgnrender( void );
  68     virtual void        endrender( void );
  69
  70     // called to make a display list of the output vertices
  71     virtual void        makeobj( int n );
  72     virtual void        closeobj( void );
  73
  74     // called when a error occurs
  75     virtual void        errorHandler( int );
  76
  77     void                bgnsurface( long );
  78     void                endsurface( void );
  79     void                bgntrim( void );
  80     void                endtrim( void );
  81     void                bgncurve( long );
  82     void                endcurve( void );
  83     void                pwlcurve( long, INREAL[], long, long );
  84     void                nurbscurve( long, INREAL[], long, INREAL[], long, long );
  85     void                nurbssurface( long, INREAL[], long, INREAL[], long, long,
  86                             INREAL[], long, long, long );
  87
  88     void                defineMap( long, long, long );
  89     void                redefineMaps( void );
  90
  91     // recording of input description
  92     void                discardRecording( void * );
  93     void *              beginRecording( void );
  94     void                endRecording( void );
  95     void                playRecording( void * );
  96
  97     //for optimizing untrimmed nurbs in the case of domain distance sampling
  98     void set_domain_distance_u_rate(REAL u_rate);
  99     void set_domain_distance_v_rate(REAL v_rate);
 100     void set_is_domain_distance_sampling(int flag);
 101
 102
 103 protected:
 104     Renderhints         renderhints;
 105     Maplist             maplist;
 106     Backend             backend;
 107
 108 private:
 109
 110     void                resetObjects( void );
 111     int                 do_check_knots( Knotvector *, const char * );
 112     void                do_nurbserror( int );
 113     void                do_bgncurve( O_curve * );
 114     void                do_endcurve( void );
 115     void                do_freeall( void );
 116     void                do_freecurveall( O_curve * );
 117     void                do_freebgntrim( O_trim * );
 118     void                do_freebgncurve( O_curve * );
 119     void                do_freepwlcurve( O_pwlcurve * );
 120     void                do_freenurbscurve( O_nurbscurve * );
 121     void                do_freenurbssurface( O_nurbssurface * );
 122     void                do_freebgnsurface( O_surface * );
 123     void                do_bgnsurface( O_surface * );
 124     void                do_endsurface( void );
 125     void                do_bgntrim( O_trim * );
 126     void                do_endtrim( void );
 127     void                do_pwlcurve( O_pwlcurve * );
 128     void                do_nurbscurve( O_nurbscurve * );
 129     void                do_nurbssurface( O_nurbssurface * );
 130     void                do_freenurbsproperty( Property * );
 131     void                do_setnurbsproperty( Property * );
 132     void                do_setnurbsproperty2( Property * );
 133
 134     Subdivider          subdivider;
 135     JumpBuffer*         jumpbuffer;
 136     Pool                o_pwlcurvePool;
 137     Pool                o_nurbscurvePool;
 138     Pool                o_curvePool;
 139     Pool                o_trimPool;
 140     Pool                o_surfacePool;
 141     Pool                o_nurbssurfacePool;
 142     Pool                propertyPool;
 143 public:
 144     Pool                quiltPool;
 145 private:
 146     TrimVertexPool      extTrimVertexPool;
 147
 148     int                 inSurface;              /* bgnsurface seen */
 149     int                 inCurve;                /* bgncurve seen */
 150     int                 inTrim;                 /* bgntrim seen */
 151     int                 isCurveModified;        /* curve changed */
 152     int                 isTrimModified;         /* trim curves changed */
 153     int                 isSurfaceModified;      /* surface changed */
 154     int                 isDataValid;            /* all data is good */
 155     int                 numTrims;               /* valid trim regions */
 156     int                 playBack;
 157
 158     O_trim**            nextTrim;               /* place to link o_trim */
 159     O_curve**           nextCurve;              /* place to link o_curve */
 160     O_nurbscurve**      nextNurbscurve;         /* place to link o_nurbscurve */
 161     O_pwlcurve**        nextPwlcurve;           /* place to link o_pwlcurve */
 162     O_nurbssurface**    nextNurbssurface;       /* place to link o_nurbssurface */
 163
 164     O_surface*          currentSurface;
 165     O_trim*             currentTrim;
 166     O_curve*            currentCurve;
 167
 168     DisplayList         *dl;
 169
 170 };
 171
 172 #endif /* __glunurbstess_h_ */