src/glu/sgi/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  * $Date: 2001/08/07 17:34:11 $ $Revision: 1.4 $
  39  * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/glsurfeval.h,v 1.4 2001/08/07 17:34:11 brianp Exp $
  40  */
  41
  42 #ifndef __gluglsurfeval_h_
  43 #define __gluglsurfeval_h_
  44
  45 #include "basicsurfeval.h"
  46 #include "bezierPatchMesh.h" //in case output triangles
  47 #include <GL/gl.h>
  48 #include <GL/glu.h>
  49
  50 class SurfaceMap;
  51 class OpenGLSurfaceEvaluator;
  52 class StoredVertex;
  53
  54 #define TYPECOORD       1
  55 #define TYPEPOINT       2
  56
  57 /* Cache up to 3 vertices from tmeshes */
  58 #define VERTEX_CACHE_SIZE       3
  59
  60 /*for internal evaluator callback stuff*/
  61 #ifndef IN_MAX_BEZIER_ORDER
  62 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
  63 #endif
  64
  65 #ifndef IN_MAX_DIMENSION
  66 #define IN_MAX_DIMENSION 4
  67 #endif
  68
  69 typedef struct surfEvalMachine{
  70   REAL uprime;//cached previusly evaluated uprime.
  71   REAL vprime;
  72   int k; /*the dimension*/
  73   REAL u1;
  74   REAL u2;
  75   int ustride;
  76   int uorder;
  77   REAL v1;
  78   REAL v2;
  79   int vstride;
  80   int vorder;
  81   REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
  82   REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
  83   REAL vcoeff[IN_MAX_BEZIER_ORDER];
  84   REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
  85   REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER];
  86 } surfEvalMachine;
  87
  88
  89
  90 class StoredVertex {
  91 public:
  92                 StoredVertex() { type = 0; }
  93                 ~StoredVertex(void) {}
  94     void        saveEvalCoord(REAL x, REAL y)
  95                     {coord[0] = x; coord[1] = y; type = TYPECOORD; }
  96     void        saveEvalPoint(long x, long y)
  97                     {point[0] = x; point[1] = y; type = TYPEPOINT; }
  98     void        invoke(OpenGLSurfaceEvaluator *eval);
  99
 100 private:
 101     int         type;
 102     REAL        coord[2];
 103     long        point[2];
 104 };
 105
 106 class OpenGLSurfaceEvaluator : public BasicSurfaceEvaluator {
 107 public:
 108                         OpenGLSurfaceEvaluator();
 109                         ~OpenGLSurfaceEvaluator( void );
 110     void                polymode( long style );
 111     void                range2f( long, REAL *, REAL * );
 112     void                domain2f( REAL, REAL, REAL, REAL );
 113     void                addMap( SurfaceMap * ) { }
 114
 115     void                enable( long );
 116     void                disable( long );
 117     void                bgnmap2f( long );
 118     void                map2f( long, REAL, REAL, long, long,
 119                                      REAL, REAL, long, long, REAL * );
 120     void                mapgrid2f( long, REAL, REAL, long, REAL, REAL );
 121     void                mapmesh2f( long, long, long, long, long );
 122     void                evalcoord2f( long, REAL, REAL );
 123     void                evalpoint2i( long, long );
 124     void                endmap2f( void );
 125
 126     void                bgnline( void );
 127     void                endline( void );
 128     void                bgnclosedline( void );
 129     void                endclosedline( void );
 130     void                bgntmesh( void );
 131     void                swaptmesh( void );
 132     void                endtmesh( void );
 133     void                bgnqstrip( void );
 134     void                endqstrip( void );
 135
 136     void                bgntfan( void );
 137     void                endtfan( void );
 138     void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
 139                                    int n_lower, REAL v_lower, REAL* lower_val);
 140     void                evalVStrip(int n_left, REAL u_left, REAL* left_val,
 141                                    int n_right, REAL u_right, REAL* right_val);
 142
 143     void                coord2f( REAL, REAL );
 144     void                point2i( long, long );
 145
 146     void                newtmeshvert( REAL, REAL );
 147     void                newtmeshvert( long, long );
 148
 149 #ifdef _WIN32
 150     void                putCallBack(GLenum which, void (APIENTRY *fn)() );
 151 #else
 152     void                putCallBack(GLenum which, _GLUfuncptr fn );
 153 #endif
 154
 155     int                 get_vertices_call_back()
 156       {
 157         return output_triangles;
 158       }
 159     void                put_vertices_call_back(int flag)
 160       {
 161         output_triangles = flag;
 162       }
 163
 164     void                 put_callback_auto_normal(int flag)
 165       {
 166         callback_auto_normal = flag;
 167       }
 168
 169    int                   get_callback_auto_normal()
 170      {
 171         return callback_auto_normal;
 172       }
 173
 174    void                  set_callback_userData(void* data)
 175      {
 176        userData = data;
 177      }
 178
 179     /**************begin for LOD_eval_list***********/
 180     void LOD_eval_list(int level);
 181
 182
 183
 184
 185 private:
 186     StoredVertex        *vertexCache[VERTEX_CACHE_SIZE];
 187     int                 tmeshing;
 188     int                 which;
 189     int                 vcount;
 190
 191     GLint              gl_polygon_mode[2];/*to save and restore so that
 192                                          *no side effect
 193                                          */
 194     bezierPatchMesh        *global_bpm; //for output triangles
 195     int                output_triangles; //true 1 or false 0
 196
 197
 198
 199     void (GLAPIENTRY *beginCallBackN) (GLenum type);
 200     void (GLAPIENTRY *endCallBackN)   (void);
 201     void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
 202     void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
 203     void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
 204     void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
 205
 206     void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
 207     void (GLAPIENTRY *endCallBackData)   (void* data);
 208     void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
 209     void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
 210     void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
 211     void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
 212
 213     void               beginCallBack (GLenum type, void* data);
 214     void               endCallBack   (void* data);
 215     void               vertexCallBack (const GLfloat *vert, void* data);
 216     void               normalCallBack (const GLfloat *normal, void* data);
 217     void               colorCallBack (const GLfloat *color, void* data);
 218     void               texcoordCallBack (const GLfloat *texcoord, void* data);
 219
 220
 221     void* userData; //the opaque pointer for Data callback functions.
 222
 223    /*LOD evaluation*/
 224    void LOD_triangle(REAL A[2], REAL B[2], REAL C[2],
 225                      int level);
 226    void LOD_eval(int num_vert, REAL* verts, int type, int level);
 227
 228   int LOD_eval_level; //set by LOD_eval_list()
 229
 230    /*************begin for internal evaluators*****************/
 231
 232  /*the following global variables are only defined in this file.
 233  *They are used to cache the precomputed Bezier polynomial values.
 234  *These calues may be used consecutively in which case we don't have
 235  *recompute these values again.
 236  */
 237  int global_uorder; /*store the uorder in the previous evaluation*/
 238  int global_vorder; /*store the vorder in the previous evaluation*/
 239  REAL global_uprime;
 240  REAL global_vprime;
 241  REAL global_vprime_BV;
 242  REAL global_uprime_BU;
 243  int global_uorder_BV; /*store the uorder in the previous evaluation*/
 244  int global_vorder_BV; /*store the vorder in the previous evaluation*/
 245  int global_uorder_BU; /*store the uorder in the previous evaluation*/
 246  int global_vorder_BU; /*store the vorder in the previous evaluation*/
 247
 248  REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
 249  REAL global_vcoeff[IN_MAX_BEZIER_ORDER];
 250  REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
 251  REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER];
 252
 253  REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 254  REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 255  REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 256  REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
 257  REAL* global_baseData;
 258
 259  int    global_ev_k; /*the dimension*/
 260  REAL global_ev_u1;
 261  REAL global_ev_u2;
 262  int    global_ev_ustride;
 263  int    global_ev_uorder;
 264  REAL global_ev_v1;
 265  REAL global_ev_v2;
 266  int    global_ev_vstride;
 267  int    global_ev_vorder;
 268  REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
 269
 270  REAL  global_grid_u0;
 271  REAL  global_grid_u1;
 272  int     global_grid_nu;
 273  REAL  global_grid_v0;
 274  REAL  global_grid_v1;
 275  int     global_grid_nv;
 276
 277 /*functions*/
 278  void inDoDomain2WithDerivs(int k, REAL u, REAL v,
 279                                 REAL u1, REAL u2, int uorder,
 280                                 REAL v1,  REAL v2, int vorder,
 281                                 REAL *baseData,
 282                                 REAL *retPoint, REAL *retdu, REAL *retdv);
 283  void inPreEvaluate(int order, REAL vprime, REAL *coeff);
 284  void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv);
 285  void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv);
 286  void inComputeNormal2(REAL *pu, REAL *pv, REAL *n);
 287  void inDoEvalCoord2(REAL u, REAL v,
 288                      REAL *retPoint, REAL *retNormal);
 289  void inDoEvalCoord2NOGE(REAL u, REAL v,
 290                      REAL *retPoint, REAL *retNormal);
 291  void inMap2f(int k,
 292               REAL ulower,
 293               REAL uupper,
 294               int ustride,
 295               int uorder,
 296               REAL vlower,
 297               REAL vupper,
 298               int vstride,
 299               int vorder,
 300               REAL *ctlPoints);
 301
 302  void inMapGrid2f(int nu, REAL u0, REAL u1,
 303                   int nv, REAL v0, REAL v1);
 304
 305  void inEvalMesh2(int lowU, int lowV, int highU, int highV);
 306  void inEvalPoint2(int i, int j);
 307  void inEvalCoord2f(REAL u, REAL v);
 308
 309 void inEvalULine(int n_points, REAL v, REAL* u_vals,
 310         int stride, REAL ret_points[][3], REAL ret_normals[][3]);
 311
 312 void inEvalVLine(int n_points, REAL u, REAL* v_vals,
 313         int stride, REAL ret_points[][3], REAL ret_normals[][3]);
 314
 315 void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
 316                        int n_lower, REAL v_lower, REAL* lower_val
 317                        );
 318 void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val);
 319
 320 void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData);
 321 void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData);
 322 void inPreEvaluateBV_intfac(REAL v )
 323   {
 324    inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
 325   }
 326
 327 void inPreEvaluateBU_intfac(REAL u)
 328   {
 329     inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints);
 330   }
 331
 332 void inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
 333                              REAL u1, REAL u2, int uorder,
 334                              REAL v1, REAL v2, int vorder,
 335                              REAL *baseData,
 336                              REAL *retPoint, REAL* retdu, REAL *retdv);
 337
 338 void inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
 339                              REAL u1, REAL u2, int uorder,
 340                              REAL v1, REAL v2, int vorder,
 341                              REAL *baseData,
 342                              REAL *retPoint, REAL* retdu, REAL *retdv);
 343
 344
 345 void inDoEvalCoord2NOGE_BV(REAL u, REAL v,
 346                            REAL *retPoint, REAL *retNormal);
 347
 348 void inDoEvalCoord2NOGE_BU(REAL u, REAL v,
 349                            REAL *retPoint, REAL *retNormal);
 350
 351 void inBPMEval(bezierPatchMesh* bpm);
 352 void inBPMListEval(bezierPatchMesh* list);
 353
 354 /*-------------begin for surfEvalMachine -------------*/
 355 surfEvalMachine em_vertex;
 356 surfEvalMachine em_normal;
 357 surfEvalMachine em_color;
 358 surfEvalMachine em_texcoord;
 359
 360 int auto_normal_flag; //whether to output normla or not in callback
 361                       //determined by GL_AUTO_NORMAL and callback_auto_normal
 362 int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT
 363 int vertex_flag;
 364 int normal_flag;
 365 int color_flag;
 366 int texcoord_flag;
 367
 368 void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex
 369                int dimension,
 370               REAL ulower,
 371               REAL uupper,
 372               int ustride,
 373               int uorder,
 374               REAL vlower,
 375               REAL vupper,
 376               int vstride,
 377               int vorder,
 378               REAL *ctlPoints);
 379
 380 void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v,
 381                                 REAL *retPoint, REAL *retdu, REAL *retdv);
 382 void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v,
 383                                 REAL *retPoint);
 384  void inDoEvalCoord2EM(REAL u, REAL v);
 385
 386 void inBPMEvalEM(bezierPatchMesh* bpm);
 387 void inBPMListEvalEM(bezierPatchMesh* list);
 388
 389 /*-------------end for surfEvalMachine -------------*/
 390
 391
 392    /*************end for internal evaluators*****************/
 393
 394 };
 395
 396 inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval)
 397 {
 398     switch(type) {
 399       case TYPECOORD:
 400         eval->coord2f(coord[0], coord[1]);
 401         break;
 402       case TYPEPOINT:
 403         eval->point2i(point[0], point[1]);
 404         break;
 405       default:
 406         break;
 407     }
 408 }
 409
 410 #endif /* __gluglsurfeval_h_ */