reactos/dll/win32/glu32/libnurbs/interface/glsurfeval.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  * glsurfeval.h
  37  *
  38  */
  39
  40 #ifndef __gluglsurfeval_h_
  41 #define __gluglsurfeval_h_
  42
  43 #include "basicsurfeval.h"
  44 #include "bezierPatchMesh.h" //in case output triangles
  45 #include <GL/gl.h>
  46 #include <GL/glu.h>
  47
  48 class SurfaceMap;
  49 class OpenGLSurfaceEvaluator;
  50 class StoredVertex;
  51
  52 #define TYPECOORD       1
  53 #define TYPEPOINT       2
  54
  55 /* Cache up to 3 vertices from tmeshes */
  56 #define VERTEX_CACHE_SIZE       3
  57
  58 /*for internal evaluator callback stuff*/
  59 #ifndef IN_MAX_BEZIER_ORDER
  60 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
  61 #endif
  62
  63 #ifndef IN_MAX_DIMENSION
  64 #define IN_MAX_DIMENSION 4
  65 #endif
  66
  67 typedef struct surfEvalMachine{
  68   REAL uprime;//cached previusly evaluated uprime.
  69   REAL vprime;
  70   int k; /*the dimension*/
  71   REAL u1;
  72   REAL u2;
  73   int ustride;
  74   int uorder;
  75   REAL v1;
  76   REAL v2;
  77   int vstride;
  78   int vorder;
  79   REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
  80   REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
  81   REAL vcoeff[IN_MAX_BEZIER_ORDER];
  82   REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
  83   REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER];
  84 } surfEvalMachine;
  85
  86
  87
  88 class StoredVertex {
  89 public:
  90                 StoredVertex() { type = 0; }
  91                 ~StoredVertex(void) {}
  92     void        saveEvalCoord(REAL x, REAL y)
  93                     {coord[0] = x; coord[1] = y; type = TYPECOORD; }
  94     void        saveEvalPoint(long x, long y)
  95                     {point[0] = x; point[1] = y; type = TYPEPOINT; }
  96     void        invoke(OpenGLSurfaceEvaluator *eval);
  97
  98 private:
  99     int         type;
 100     REAL        coord[2];
 101     long        point[2];
 102 };
 103
 104 class OpenGLSurfaceEvaluator : public BasicSurfaceEvaluator {
 105 public:
 106                         OpenGLSurfaceEvaluator();
 107                         virtual ~OpenGLSurfaceEvaluator( void );
 108     void                polymode( long style );
 109     void                range2f( long, REAL *, REAL * );
 110     void                domain2f( REAL, REAL, REAL, REAL );
 111     void                addMap( SurfaceMap * ) { }
 112
 113     void                enable( long );
 114     void                disable( long );
 115     void                bgnmap2f( long );
 116     void                map2f( long, REAL, REAL, long, long,
 117                                      REAL, REAL, long, long, REAL * );
 118     void                mapgrid2f( long, REAL, REAL, long, REAL, REAL );
 119     void                mapmesh2f( long, long, long, long, long );
 120     void                evalcoord2f( long, REAL, REAL );
 121     void                evalpoint2i( long, long );
 122     void                endmap2f( void );
 123
 124     void                bgnline( void );
 125     void                endline( void );
 126     void                bgnclosedline( void );
 127     void                endclosedline( void );
 128     void                bgntmesh( void );
 129     void                swaptmesh( void );
 130     void                endtmesh( void );
 131     void                bgnqstrip( void );
 132     void                endqstrip( void );
 133
 134     void                bgntfan( void );
 135     void                endtfan( void );
 136     void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
 137                                    int n_lower, REAL v_lower, REAL* lower_val);
 138     void                evalVStrip(int n_left, REAL u_left, REAL* left_val,
 139                                    int n_right, REAL u_right, REAL* right_val);
 140
 141     void                coord2f( REAL, REAL );
 142     void                point2i( long, long );
 143
 144     void                newtmeshvert( REAL, REAL );
 145     void                newtmeshvert( long, long );
 146
 147 #ifdef _WIN32
 148     void                putCallBack(GLenum which, void (APIENTRY *fn)() );
 149 #else
 150     void                putCallBack(GLenum which, _GLUfuncptr fn );
 151 #endif
 152
 153     int                 get_vertices_call_back()
 154       {
 155         return output_triangles;
 156       }
 157     void                put_vertices_call_back(int flag)
 158       {
 159         output_triangles = flag;
 160       }
 161
 162     void                 put_callback_auto_normal(int flag)
 163       {
 164         callback_auto_normal = flag;
 165       }
 166
 167    int                   get_callback_auto_normal()
 168      {
 169         return callback_auto_normal;
 170       }
 171
 172    void                  set_callback_userData(void* data)
 173      {
 174        userData = data;
 175      }
 176
 177     /**************begin for LOD_eval_list***********/
 178     void LOD_eval_list(int level);
 179
 180
 181
 182
 183 private:
 184     StoredVertex        *vertexCache[VERTEX_CACHE_SIZE];
 185     int                 tmeshing;
 186     int                 which;
 187     int                 vcount;
 188
 189     GLint              gl_polygon_mode[2];/*to save and restore so that
 190                                          *no side effect
 191                                          */
 192     bezierPatchMesh        *global_bpm; //for output triangles
 193     int                output_triangles; //true 1 or false 0
 194
 195
 196
 197     void (GLAPIENTRY *beginCallBackN) (GLenum type);
 198     void (GLAPIENTRY *endCallBackN)   (void);
 199     void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
 200     void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
 201     void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
 202     void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
 203
 204     void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
 205     void (GLAPIENTRY *endCallBackData)   (void* data);
 206     void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
 207     void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
 208     void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
 209     void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
 210
 211     void               beginCallBack (GLenum type, void* data);
 212     void               endCallBack   (void* data);
 213     void               vertexCallBack (const GLfloat *vert, void* data);
 214     void               normalCallBack (const GLfloat *normal, void* data);
 215     void               colorCallBack (const GLfloat *color, void* data);
 216     void               texcoordCallBack (const GLfloat *texcoord, void* data);
 217
 218
 219     void* userData; //the opaque pointer for Data callback functions.
 220
 221    /*LOD evaluation*/
 222    void LOD_triangle(REAL A[2], REAL B[2], REAL C[2],
 223                      int level);
 224    void LOD_eval(int num_vert, REAL* verts, int type, int level);
 225
 226   int LOD_eval_level; //set by LOD_eval_list()
 227
 228    /*************begin for internal evaluators*****************/
 229
 230  /*the following global variables are only defined in this file.
 231  *They are used to cache the precomputed Bezier polynomial values.
 232  *These calues may be used consecutively in which case we don't have
 233  *recompute these values again.
 234  */
 235  int global_uorder; /*store the uorder in the previous evaluation*/
 236  int global_vorder; /*store the vorder in the previous evaluation*/
 237  REAL global_uprime;
 238  REAL global_vprime;
 239  REAL global_vprime_BV;
 240  REAL global_uprime_BU;
 241  int global_uorder_BV; /*store the uorder in the previous evaluation*/
 242  int global_vorder_BV; /*store the vorder in the previous evaluation*/
 243  int global_uorder_BU; /*store the uorder in the previous evaluation*/
 244  int global_vorder_BU; /*store the vorder in the previous evaluation*/
 245
 246  REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
 247  REAL global_vcoeff[IN_MAX_BEZIER_ORDER];
 248  REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
 249  REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER];
 250
 251  REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 252  REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 253  REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 254  REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 255  REAL* global_baseData;
 256
 257  int    global_ev_k; /*the dimension*/
 258  REAL global_ev_u1;
 259  REAL global_ev_u2;
 260  int    global_ev_ustride;
 261  int    global_ev_uorder;
 262  REAL global_ev_v1;
 263  REAL global_ev_v2;
 264  int    global_ev_vstride;
 265  int    global_ev_vorder;
 266  REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
 267
 268  REAL  global_grid_u0;
 269  REAL  global_grid_u1;
 270  int     global_grid_nu;
 271  REAL  global_grid_v0;
 272  REAL  global_grid_v1;
 273  int     global_grid_nv;
 274
 275 /*functions*/
 276  void inDoDomain2WithDerivs(int k, REAL u, REAL v,
 277                                 REAL u1, REAL u2, int uorder,
 278                                 REAL v1,  REAL v2, int vorder,
 279                                 REAL *baseData,
 280                                 REAL *retPoint, REAL *retdu, REAL *retdv);
 281  void inPreEvaluate(int order, REAL vprime, REAL *coeff);
 282  void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv);
 283  void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv);
 284  void inComputeNormal2(REAL *pu, REAL *pv, REAL *n);
 285  void inDoEvalCoord2(REAL u, REAL v,
 286                      REAL *retPoint, REAL *retNormal);
 287  void inDoEvalCoord2NOGE(REAL u, REAL v,
 288                      REAL *retPoint, REAL *retNormal);
 289  void inMap2f(int k,
 290               REAL ulower,
 291               REAL uupper,
 292               int ustride,
 293               int uorder,
 294               REAL vlower,
 295               REAL vupper,
 296               int vstride,
 297               int vorder,
 298               REAL *ctlPoints);
 299
 300  void inMapGrid2f(int nu, REAL u0, REAL u1,
 301                   int nv, REAL v0, REAL v1);
 302
 303  void inEvalMesh2(int lowU, int lowV, int highU, int highV);
 304  void inEvalPoint2(int i, int j);
 305  void inEvalCoord2f(REAL u, REAL v);
 306
 307 void inEvalULine(int n_points, REAL v, REAL* u_vals,
 308         int stride, REAL ret_points[][3], REAL ret_normals[][3]);
 309
 310 void inEvalVLine(int n_points, REAL u, REAL* v_vals,
 311         int stride, REAL ret_points[][3], REAL ret_normals[][3]);
 312
 313 void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
 314                        int n_lower, REAL v_lower, REAL* lower_val
 315                        );
 316 void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val);
 317
 318 void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData);
 319 void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData);
 320 void inPreEvaluateBV_intfac(REAL v )
 321   {
 322    inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
 323   }
 324
 325 void inPreEvaluateBU_intfac(REAL u)
 326   {
 327     inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints);
 328   }
 329
 330 void inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
 331                              REAL u1, REAL u2, int uorder,
 332                              REAL v1, REAL v2, int vorder,
 333                              REAL *baseData,
 334                              REAL *retPoint, REAL* retdu, REAL *retdv);
 335
 336 void inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
 337                              REAL u1, REAL u2, int uorder,
 338                              REAL v1, REAL v2, int vorder,
 339                              REAL *baseData,
 340                              REAL *retPoint, REAL* retdu, REAL *retdv);
 341
 342
 343 void inDoEvalCoord2NOGE_BV(REAL u, REAL v,
 344                            REAL *retPoint, REAL *retNormal);
 345
 346 void inDoEvalCoord2NOGE_BU(REAL u, REAL v,
 347                            REAL *retPoint, REAL *retNormal);
 348
 349 void inBPMEval(bezierPatchMesh* bpm);
 350 void inBPMListEval(bezierPatchMesh* list);
 351
 352 /*-------------begin for surfEvalMachine -------------*/
 353 surfEvalMachine em_vertex;
 354 surfEvalMachine em_normal;
 355 surfEvalMachine em_color;
 356 surfEvalMachine em_texcoord;
 357
 358 int auto_normal_flag; //whether to output normla or not in callback
 359                       //determined by GL_AUTO_NORMAL and callback_auto_normal
 360 int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT
 361 int vertex_flag;
 362 int normal_flag;
 363 int color_flag;
 364 int texcoord_flag;
 365
 366 void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex
 367                int dimension,
 368               REAL ulower,
 369               REAL uupper,
 370               int ustride,
 371               int uorder,
 372               REAL vlower,
 373               REAL vupper,
 374               int vstride,
 375               int vorder,
 376               REAL *ctlPoints);
 377
 378 void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v,
 379                                 REAL *retPoint, REAL *retdu, REAL *retdv);
 380 void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v,
 381                                 REAL *retPoint);
 382  void inDoEvalCoord2EM(REAL u, REAL v);
 383
 384 void inBPMEvalEM(bezierPatchMesh* bpm);
 385 void inBPMListEvalEM(bezierPatchMesh* list);
 386
 387 /*-------------end for surfEvalMachine -------------*/
 388
 389
 390    /*************end for internal evaluators*****************/
 391
 392 };
 393
 394 inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval)
 395 {
 396     switch(type) {
 397       case TYPECOORD:
 398         eval->coord2f(coord[0], coord[1]);
 399         break;
 400       case TYPEPOINT:
 401         eval->point2i(point[0], point[1]);
 402         break;
 403       default:
 404         break;
 405     }
 406 }
 407
 408 #endif /* __gluglsurfeval_h_ */