main/polyobj.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include <conf.h>
  16 #endif
  17
  18 #ifdef RCS
  19 static char rcsid[] = "$Id: polyobj.c,v 1.5 2001-01-31 15:34:40 bradleyb Exp $";
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 // -- I hate this warning in make depend! -- #ifdef DRIVE
  27 // -- I hate this warning in make depend! -- #include "drive.h"
  28 // -- I hate this warning in make depend! -- #else
  29 #include "inferno.h"
  30 // -- I hate this warning in make depend! -- #endif
  31
  32 #include "polyobj.h"
  33
  34 #include "vecmat.h"
  35 #include "3d.h"
  36 #include "error.h"
  37 #include "mono.h"
  38 #include "u_mem.h"
  39 #include "args.h"
  40
  41 #ifndef DRIVE
  42 #include "texmap.h"
  43 #include "bm.h"
  44 #include "textures.h"
  45 #include "object.h"
  46 #include "lighting.h"
  47 #include "cfile.h"
  48 #include "piggy.h"
  49 #endif
  50
  51 #include "pa_enabl.h"
  52
  53 #ifdef _3DFX
  54 #include "3dfx_des.h"
  55 #endif
  56
  57 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  58
  59 int N_polygon_models = 0;
  60
  61 #define MAX_POLYGON_VECS 1000
  62 g3s_point robot_points[MAX_POLYGON_VECS];
  63
  64 #define PM_COMPATIBLE_VERSION 6
  65 #define PM_OBJFILE_VERSION 8
  66
  67 int     Pof_file_end;
  68 int     Pof_addr;
  69
  70 #define MODEL_BUF_SIZE  32768
  71
  72 void _pof_cfseek(int len,int type)
  73 {
  74         switch (type) {
  75                 case SEEK_SET:  Pof_addr = len; break;
  76                 case SEEK_CUR:  Pof_addr += len;        break;
  77                 case SEEK_END:
  78                         Assert(len <= 0);       //      seeking from end, better be moving back.
  79                         Pof_addr = Pof_file_end + len;
  80                         break;
  81         }
  82
  83         if (Pof_addr > MODEL_BUF_SIZE)
  84                 Int3();
  85 }
  86
  87 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  88
  89 int pof_read_int(ubyte *bufp)
  90 {
  91         int i;
  92
  93         i = *((int *) &bufp[Pof_addr]);
  94         Pof_addr += 4;
  95         return i;
  96
  97 //      if (cfread(&i,sizeof(i),1,f) != 1)
  98 //              Error("Unexpected end-of-file while reading object");
  99 //
 100 //      return i;
 101 }
 102
 103 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 104 {
 105         if (Pof_addr + nelem*elsize > Pof_file_end)
 106                 return 0;
 107
 108         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 109
 110         Pof_addr += elsize*nelem;
 111
 112         if (Pof_addr > MODEL_BUF_SIZE)
 113                 Int3();
 114
 115         return nelem;
 116 }
 117
 118 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 119 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 120
 121 short pof_read_short(ubyte *bufp)
 122 {
 123         short s;
 124
 125         s = *((short *) &bufp[Pof_addr]);
 126         Pof_addr += 2;
 127         return s;
 128 //      if (cfread(&s,sizeof(s),1,f) != 1)
 129 //              Error("Unexpected end-of-file while reading object");
 130 //
 131 //      return s;
 132 }
 133
 134 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 135 {
 136         int     i;
 137
 138         for (i=0; i<max_char; i++) {
 139                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 140                         break;
 141         }
 142
 143 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 144
 145 }
 146
 147 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 148 {
 149 //      cfread(vecs,sizeof(vms_vector),n,f);
 150
 151         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 152         Pof_addr += n*sizeof(*vecs);
 153
 154         if (Pof_addr > MODEL_BUF_SIZE)
 155                 Int3();
 156 }
 157
 158 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 159 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 160 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 161 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 162 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 163 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 164
 165 #ifdef DRIVE
 166 #define robot_info void
 167 #else
 168 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 169
 170 //set the animation angles for this robot.  Gun fields of robot info must
 171 //be filled in.
 172 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 173 #endif
 174
 175 //reads a binary file containing a 3d model
 176 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 177 {
 178         CFILE *ifile;
 179         short version;
 180         int id,len, next_chunk;
 181         int anim_flag = 0;
 182         ubyte *model_buf;
 183
 184         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 185         if (!model_buf)
 186                 Error("Can't allocate space to read model %s\n", filename);
 187
 188         if ((ifile=cfopen(filename,"rb"))==NULL)
 189                 Error("Can't open file <%s>",filename);
 190
 191         Assert(ifile->size <= MODEL_BUF_SIZE);
 192
 193         Pof_addr = 0;
 194         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 195         cfclose(ifile);
 196
 197         id = pof_read_int(model_buf);
 198
 199         if (id!=0x4f505350) /* 'OPSP' */
 200                 Error("Bad ID in model file <%s>",filename);
 201
 202         version = pof_read_short(model_buf);
 203
 204         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 205                 Error("Bad version (%d) in model file <%s>",version,filename);
 206
 207         if ( FindArg( "-bspgen" ))
 208                 printf( "bspgen -c1" );
 209
 210         while (new_pof_read_int(id,model_buf) == 1) {
 211
 212                 //id  = pof_read_int(model_buf);
 213                 len = pof_read_int(model_buf);
 214                 next_chunk = Pof_addr + len;
 215
 216                 switch (id) {
 217
 218                         case ID_OHDR: {         //Object header
 219                                 vms_vector pmmin,pmmax;
 220
 221                                 //mprintf(0,"Got chunk OHDR, len=%d\n",len);
 222
 223                                 pm->n_models = pof_read_int(model_buf);
 224                                 pm->rad = pof_read_int(model_buf);
 225
 226                                 Assert(pm->n_models <= MAX_SUBMODELS);
 227
 228                                 pof_read_vecs(&pmmin,1,model_buf);
 229                                 pof_read_vecs(&pmmax,1,model_buf);
 230
 231                                 if ( FindArg( "-bspgen" ))      {
 232                                         vms_vector v;
 233                                         fix l;
 234
 235                                         vm_vec_sub(&v, &pmmax, &pmmin );
 236                                         l = v.x;
 237                                         if ( v.y > l ) l = v.y;
 238                                         if ( v.z > l ) l = v.z;
 239
 240                                         printf( " -l%.3f", f2fl(l) );
 241                                 }
 242
 243                                 break;
 244                         }
 245
 246                         case ID_SOBJ: {         //Subobject header
 247                                 int n;
 248
 249                                 anim_flag++;
 250
 251                                 //mprintf(0,"Got chunk SOBJ, len=%d\n",len);
 252
 253                                 n = pof_read_short(model_buf);
 254
 255                                 Assert(n < MAX_SUBMODELS);
 256
 257                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 258
 259                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 260                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 261                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 262
 263                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 264
 265                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 266
 267                                 break;
 268
 269                         }
 270
 271                         #ifndef DRIVE
 272                         case ID_GUNS: {         //List of guns on this object
 273
 274                                 //mprintf(0,"Got chunk GUNS, len=%d\n",len);
 275
 276                                 if (r) {
 277                                         int i;
 278                                         vms_vector gun_dir;
 279                                         ubyte gun_used[MAX_GUNS];
 280
 281                                         r->n_guns = pof_read_int(model_buf);
 282
 283                                         if ( r->n_guns )
 284                                                 anim_flag++;
 285
 286                                         Assert(r->n_guns <= MAX_GUNS);
 287
 288                                         for (i=0;i<r->n_guns;i++)
 289                                                 gun_used[i] = 0;
 290
 291                                         for (i=0;i<r->n_guns;i++) {
 292                                                 int id;
 293
 294                                                 id = pof_read_short(model_buf);
 295                                                 Assert(id < r->n_guns);
 296                                                 Assert(gun_used[id] == 0);
 297                                                 gun_used[id] = 1;
 298                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 299                                                 Assert(r->gun_submodels[id] != 0xff);
 300                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 301
 302                                                 if (version >= 7)
 303                                                         pof_read_vecs(&gun_dir,1,model_buf);
 304                                         }
 305                                 }
 306                                 else
 307                                         pof_cfseek(model_buf,len,SEEK_CUR);
 308
 309                                 break;
 310                         }
 311
 312                         case ID_ANIM:           //Animation data
 313                                 //mprintf(0,"Got chunk ANIM, len=%d\n",len);
 314
 315                                 anim_flag++;
 316
 317                                 if (r) {
 318                                         int n_frames,f,m;
 319
 320                                         n_frames = pof_read_short(model_buf);
 321
 322                                         Assert(n_frames == N_ANIM_STATES);
 323
 324                                         for (m=0;m<pm->n_models;m++)
 325                                                 for (f=0;f<n_frames;f++)
 326                                                         pof_cfread(&anim_angs[f][m],1,sizeof(vms_angvec),model_buf);
 327
 328                                         robot_set_angles(r,pm,anim_angs);
 329
 330                                 }
 331                                 else
 332                                         pof_cfseek(model_buf,len,SEEK_CUR);
 333
 334                                 break;
 335                         #endif
 336
 337                         case ID_TXTR: {         //Texture filename list
 338                                 int n;
 339                                 char name_buf[128];
 340
 341                                 //mprintf(0,"Got chunk TXTR, len=%d\n",len);
 342
 343                                 n = pof_read_short(model_buf);
 344                                 //mprintf(0,"  num textures = %d\n",n);
 345                                 while (n--) {
 346                                         pof_read_string(name_buf,128,model_buf);
 347                                         //mprintf(0,"<%s>\n",name_buf);
 348                                 }
 349
 350                                 break;
 351                         }
 352
 353                         case ID_IDTA:           //Interpreter data
 354                                 //mprintf(0,"Got chunk IDTA, len=%d\n",len);
 355
 356                                 pm->model_data = d_malloc(len);
 357                                 pm->model_data_size = len;
 358
 359                                 pof_cfread(pm->model_data,1,len,model_buf);
 360
 361                                 break;
 362
 363                         default:
 364                                 //mprintf(0,"Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 365                                 pof_cfseek(model_buf,len,SEEK_CUR);
 366                                 break;
 367
 368                 }
 369                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 370                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 371         }
 372
 373 //      for (i=0;i<pm->n_models;i++)
 374 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 375
 376         if ( FindArg( "-bspgen" )) {
 377                 char *p = strchr( filename, '.' );
 378                 *p = 0;
 379
 380                 if ( anim_flag > 1 )
 381                         printf( " -a" );
 382
 383                 printf( " %s.3ds\n", filename );
 384                 *p = '.';
 385         }
 386
 387         d_free(model_buf);
 388
 389         return pm;
 390 }
 391
 392 //reads the gun information for a model
 393 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 394 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 395 {
 396         CFILE *ifile;
 397         short version;
 398         int id,len;
 399         int n_guns=0;
 400         ubyte   *model_buf;
 401
 402         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 403         if (!model_buf)
 404                 Error("Can't allocate space to read model %s\n", filename);
 405
 406         if ((ifile=cfopen(filename,"rb"))==NULL)
 407                 Error("Can't open file <%s>",filename);
 408
 409         Assert(ifile->size <= MODEL_BUF_SIZE);
 410
 411         Pof_addr = 0;
 412         Pof_file_end = cfread(model_buf, 1, ifile->size, ifile);
 413         cfclose(ifile);
 414
 415         id = pof_read_int(model_buf);
 416
 417         if (id!=0x4f505350) /* 'OPSP' */
 418                 Error("Bad ID in model file <%s>",filename);
 419
 420         version = pof_read_short(model_buf);
 421
 422         Assert(version >= 7);           //must be 7 or higher for this data
 423
 424         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 425                 Error("Bad version (%d) in model file <%s>",version,filename);
 426
 427         while (new_pof_read_int(id,model_buf) == 1) {
 428
 429                 //id  = pof_read_int(model_buf);
 430                 len = pof_read_int(model_buf);
 431
 432                 if (id == ID_GUNS) {            //List of guns on this object
 433
 434                         //mprintf(0,"Got chunk GUNS, len=%d\n",len);
 435
 436                         int i;
 437
 438                         n_guns = pof_read_int(model_buf);
 439
 440                         for (i=0;i<n_guns;i++) {
 441                                 int id,sm;
 442
 443                                 id = pof_read_short(model_buf);
 444                                 sm = pof_read_short(model_buf);
 445                                 if (gun_submodels)
 446                                         gun_submodels[id] = sm;
 447                                 else if (sm!=0)
 448                                         Error("Invalid gun submodel in file <%s>",filename);
 449                                 pof_read_vecs(&gun_points[id],1,model_buf);
 450
 451                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 452                         }
 453
 454                 }
 455                 else
 456                         pof_cfseek(model_buf,len,SEEK_CUR);
 457
 458         }
 459
 460         d_free(model_buf);
 461
 462         return n_guns;
 463 }
 464
 465 //free up a model, getting rid of all its memory
 466 void free_model(polymodel *po)
 467 {
 468         d_free(po->model_data);
 469 }
 470
 471 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 472 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 473
 474 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 475
 476
 477 //draw a polygon model
 478
 479 void draw_polygon_model(vms_vector *pos,vms_matrix *orient,vms_angvec *anim_angles,int model_num,int flags,fix light,fix *glow_values,bitmap_index alt_textures[])
 480 {
 481         polymodel *po;
 482         int i;
 483    PA_DFX (int save_light);
 484
 485         Assert(model_num < N_polygon_models);
 486
 487         po=&Polygon_models[model_num];
 488
 489         //check if should use simple model
 490         if (po->simpler_model )                                 //must have a simpler model
 491                 if (flags==0)                                                   //can't switch if this is debris
 492                         //!!if (!alt_textures) {                                //alternate textures might not match
 493                         //alt textures might not match, but in the one case we're using this
 494                         //for on 11/14/94, they do match.  So we leave it in.
 495                         {
 496                                 int cnt=1;
 497                                 fix depth;
 498
 499                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 500
 501                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 502                                         po = &Polygon_models[po->simpler_model-1];
 503                         }
 504
 505         if (alt_textures)
 506    {
 507                 for (i=0;i<po->n_textures;i++)  {
 508                         texture_list_index[i] = alt_textures[i];
 509                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 510
 511          #ifdef _3DFX
 512          texture_list[i]->bm_handle = texture_list_index[i].index;
 513          #endif
 514                 }
 515    }
 516         else
 517    {
 518                 for (i=0;i<po->n_textures;i++)  {
 519                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 520                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 521
 522          #ifdef _3DFX
 523          texture_list[i]->bm_handle = texture_list_index[i].index;
 524          #endif
 525                 }
 526    }
 527
 528 #ifdef PIGGY_USE_PAGING
 529         // Make sure the textures for this object are paged in...
 530         piggy_page_flushed = 0;
 531         for (i=0;i<po->n_textures;i++)
 532                 PIGGY_PAGE_IN( texture_list_index[i] );
 533         // Hmmm... cache got flushed in the middle of paging all these in,
 534         // so we need to reread them all in.
 535         if (piggy_page_flushed) {
 536                 piggy_page_flushed = 0;
 537                 for (i=0;i<po->n_textures;i++)
 538                         PIGGY_PAGE_IN( texture_list_index[i] );
 539         }
 540         // Make sure that they can all fit in memory.
 541         Assert( piggy_page_flushed == 0 );
 542 #endif
 543
 544         g3_start_instance_matrix(pos,orient);
 545
 546         g3_set_interp_points(robot_points);
 547
 548 #ifdef _3DFX
 549    _3dfx_rendering_poly_obj = 1;
 550 #endif
 551         PA_DFX(save_light = Lighting_on);
 552         PA_DFX(Lighting_on = 0);
 553
 554         if (flags == 0)         //draw entire object
 555
 556                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 557
 558         else {
 559                 int i;
 560
 561                 for (i=0;flags;flags>>=1,i++)
 562                         if (flags & 1) {
 563                                 vms_vector ofs;
 564
 565                                 Assert(i < po->n_models);
 566
 567                                 //if submodel, rotate around its center point, not pivot point
 568
 569                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 570                                 vm_vec_negate(&ofs);
 571                                 g3_start_instance_matrix(&ofs,NULL);
 572
 573                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 574
 575                                 g3_done_instance();
 576                         }
 577         }
 578
 579         g3_done_instance();
 580
 581 #ifdef _3DFX
 582    _3dfx_rendering_poly_obj = 0;
 583 #endif
 584
 585         PA_DFX (Lighting_on = save_light);
 586
 587
 588 }
 589
 590 void free_polygon_models()
 591 {
 592         int i;
 593
 594         for (i=0;i<N_polygon_models;i++) {
 595                 free_model(&Polygon_models[i]);
 596         }
 597
 598 }
 599
 600 void polyobj_find_min_max(polymodel *pm)
 601 {
 602         ushort nverts;
 603         vms_vector *vp;
 604         ushort *data,type;
 605         int m;
 606         vms_vector *big_mn,*big_mx;
 607
 608         big_mn = &pm->mins;
 609         big_mx = &pm->maxs;
 610
 611         for (m=0;m<pm->n_models;m++) {
 612                 vms_vector *mn,*mx,*ofs;
 613
 614                 mn = &pm->submodel_mins[m];
 615                 mx = &pm->submodel_maxs[m];
 616                 ofs= &pm->submodel_offsets[m];
 617
 618                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 619
 620                 type = *data++;
 621
 622                 Assert(type == 7 || type == 1);
 623
 624                 nverts = *data++;
 625
 626                 if (type==7)
 627                         data+=2;                //skip start & pad
 628
 629                 vp = (vms_vector *) data;
 630
 631                 *mn = *mx = *vp++; nverts--;
 632
 633                 if (m==0)
 634                         *big_mn = *big_mx = *mn;
 635
 636                 while (nverts--) {
 637                         if (vp->x > mx->x) mx->x = vp->x;
 638                         if (vp->y > mx->y) mx->y = vp->y;
 639                         if (vp->z > mx->z) mx->z = vp->z;
 640
 641                         if (vp->x < mn->x) mn->x = vp->x;
 642                         if (vp->y < mn->y) mn->y = vp->y;
 643                         if (vp->z < mn->z) mn->z = vp->z;
 644
 645                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 646                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 647                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 648
 649                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 650                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 651                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 652
 653                         vp++;
 654                 }
 655
 656 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 657         }
 658
 659 //      printf("Whole model: (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",big_mn->x,big_mx->x,big_mn->y,big_mx->y,big_mn->z,big_mx->z);
 660
 661 }
 662
 663 extern short highest_texture_num;       //from the 3d
 664
 665 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 666
 667 //returns the number of this model
 668 #ifndef DRIVE
 669 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 670 #else
 671 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 672 #endif
 673 {
 674         #ifdef DRIVE
 675         #define r NULL
 676         #endif
 677
 678         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 679         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 680
 681         //      MK was real tired of those useless, slow mprintfs...
 682         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 683                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 684
 685         Assert(strlen(filename) <= 12);
 686         strcpy(Pof_names[N_polygon_models],filename);
 687
 688         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 689
 690         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 691
 692         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 693
 694         if (highest_texture_num+1 != n_textures)
 695                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 696
 697         Polygon_models[N_polygon_models].n_textures = n_textures;
 698         Polygon_models[N_polygon_models].first_texture = first_texture;
 699         Polygon_models[N_polygon_models].simpler_model = 0;
 700
 701 //      Assert(polygon_models[N_polygon_models]!=NULL);
 702
 703         N_polygon_models++;
 704
 705         return N_polygon_models-1;
 706
 707 }
 708
 709
 710 void init_polygon_models()
 711 {
 712         N_polygon_models = 0;
 713
 714         atexit((void (*)())free_polygon_models);
 715
 716 }
 717
 718 //compare against this size when figuring how far to place eye for picture
 719 #define BASE_MODEL_SIZE 0x28000
 720
 721 #define DEFAULT_VIEW_DIST 0x60000
 722
 723 //draws the given model in the current canvas.  The distance is set to
 724 //more-or-less fill the canvas.  Note that this routine actually renders
 725 //into an off-screen canvas that it creates, then copies to the current
 726 //canvas.
 727 void draw_model_picture(int mn,vms_angvec *orient_angles)
 728 {
 729         vms_vector      temp_pos=ZERO_VECTOR;
 730         vms_matrix      temp_orient = IDENTITY_MATRIX;
 731         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 732
 733         Assert(mn>=0 && mn<N_polygon_models);
 734
 735         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 736         gr_set_current_canvas(temp_canv);
 737         gr_clear_canvas( BM_XRGB(0,0,0) );
 738
 739         g3_start_frame();
 740         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 741
 742         if (Polygon_models[mn].rad != 0)
 743                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 744         else
 745                 temp_pos.z = DEFAULT_VIEW_DIST;
 746
 747         vm_angles_2_matrix(&temp_orient, orient_angles);
 748
 749         PA_DFX(save_light = Lighting_on);
 750         PA_DFX(Lighting_on = 0);
 751         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 752         PA_DFX (Lighting_on = save_light);
 753
 754         gr_set_current_canvas(save_canv);
 755
 756         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 757
 758         gr_free_canvas(temp_canv);
 759 }
 760