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
  15 #ifdef RCS
  16 static char rcsid[] = "$Id: polyobj.c,v 1.3 2001-01-24 04:29:48 bradleyb Exp $";
  17 #endif
  18
  19 #include <conf.h>
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 // -- I hate this warning in make depend! -- #ifdef DRIVE
  26 // -- I hate this warning in make depend! -- #include "drive.h"
  27 // -- I hate this warning in make depend! -- #else
  28 #include "inferno.h"
  29 // -- I hate this warning in make depend! -- #endif
  30
  31 #include "polyobj.h"
  32
  33 #include "vecmat.h"
  34 #include "3d.h"
  35 #include "error.h"
  36 #include "mono.h"
  37 #include "u_mem.h"
  38 #include "args.h"
  39
  40 #ifndef DRIVE
  41 #include "texmap.h"
  42 #include "bm.h"
  43 #include "textures.h"
  44 #include "object.h"
  45 #include "lighting.h"
  46 #include "cfile.h"
  47 #include "piggy.h"
  48 #endif
  49
  50 #include "pa_enabl.h"
  51
  52 #ifdef _3DFX
  53 #include "3dfx_des.h"
  54 #endif
  55
  56 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  57
  58 int N_polygon_models = 0;
  59
  60 #define MAX_POLYGON_VECS 1000
  61 g3s_point robot_points[MAX_POLYGON_VECS];
  62
  63 #define PM_COMPATIBLE_VERSION 6
  64 #define PM_OBJFILE_VERSION 8
  65
  66 int     Pof_file_end;
  67 int     Pof_addr;
  68
  69 #define MODEL_BUF_SIZE  32768
  70
  71 void _pof_cfseek(int len,int type)
  72 {
  73         switch (type) {
  74                 case SEEK_SET:  Pof_addr = len; break;
  75                 case SEEK_CUR:  Pof_addr += len;        break;
  76                 case SEEK_END:
  77                         Assert(len <= 0);       //      seeking from end, better be moving back.
  78                         Pof_addr = Pof_file_end + len;
  79                         break;
  80         }
  81
  82         if (Pof_addr > MODEL_BUF_SIZE)
  83                 Int3();
  84 }
  85
  86 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  87
  88 int pof_read_int(ubyte *bufp)
  89 {
  90         int i;
  91
  92         i = *((int *) &bufp[Pof_addr]);
  93         Pof_addr += 4;
  94         return i;
  95
  96 //      if (cfread(&i,sizeof(i),1,f) != 1)
  97 //              Error("Unexpected end-of-file while reading object");
  98 //
  99 //      return i;
 100 }
 101
 102 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 103 {
 104         if (Pof_addr + nelem*elsize > Pof_file_end)
 105                 return 0;
 106
 107         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 108
 109         Pof_addr += elsize*nelem;
 110
 111         if (Pof_addr > MODEL_BUF_SIZE)
 112                 Int3();
 113
 114         return nelem;
 115 }
 116
 117 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 118 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 119
 120 short pof_read_short(ubyte *bufp)
 121 {
 122         short s;
 123
 124         s = *((short *) &bufp[Pof_addr]);
 125         Pof_addr += 2;
 126         return s;
 127 //      if (cfread(&s,sizeof(s),1,f) != 1)
 128 //              Error("Unexpected end-of-file while reading object");
 129 //
 130 //      return s;
 131 }
 132
 133 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 134 {
 135         int     i;
 136
 137         for (i=0; i<max_char; i++) {
 138                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 139                         break;
 140         }
 141
 142 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 143
 144 }
 145
 146 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 147 {
 148 //      cfread(vecs,sizeof(vms_vector),n,f);
 149
 150         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 151         Pof_addr += n*sizeof(*vecs);
 152
 153         if (Pof_addr > MODEL_BUF_SIZE)
 154                 Int3();
 155 }
 156
 157 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 158 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 159 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 160 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 161 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 162 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 163
 164 #ifdef DRIVE
 165 #define robot_info void
 166 #else
 167 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 168
 169 //set the animation angles for this robot.  Gun fields of robot info must
 170 //be filled in.
 171 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 172 #endif
 173
 174 //reads a binary file containing a 3d model
 175 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 176 {
 177         CFILE *ifile;
 178         short version;
 179         int id,len, next_chunk;
 180         int anim_flag = 0;
 181         ubyte *model_buf;
 182
 183         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 184         if (!model_buf)
 185                 Error("Can't allocate space to read model %s\n", filename);
 186
 187         if ((ifile=cfopen(filename,"rb"))==NULL)
 188                 Error("Can't open file <%s>",filename);
 189
 190         Assert(ifile->size <= MODEL_BUF_SIZE);
 191
 192         Pof_addr = 0;
 193         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 194         cfclose(ifile);
 195
 196         id = pof_read_int(model_buf);
 197
 198         if (id!=0x4f505350) /* 'OPSP' */
 199                 Error("Bad ID in model file <%s>",filename);
 200
 201         version = pof_read_short(model_buf);
 202
 203         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 204                 Error("Bad version (%d) in model file <%s>",version,filename);
 205
 206         if ( FindArg( "-bspgen" ))
 207                 printf( "bspgen -c1" );
 208
 209         while (new_pof_read_int(id,model_buf) == 1) {
 210
 211                 //id  = pof_read_int(model_buf);
 212                 len = pof_read_int(model_buf);
 213                 next_chunk = Pof_addr + len;
 214
 215                 switch (id) {
 216
 217                         case ID_OHDR: {         //Object header
 218                                 vms_vector pmmin,pmmax;
 219
 220                                 //mprintf(0,"Got chunk OHDR, len=%d\n",len);
 221
 222                                 pm->n_models = pof_read_int(model_buf);
 223                                 pm->rad = pof_read_int(model_buf);
 224
 225                                 Assert(pm->n_models <= MAX_SUBMODELS);
 226
 227                                 pof_read_vecs(&pmmin,1,model_buf);
 228                                 pof_read_vecs(&pmmax,1,model_buf);
 229
 230                                 if ( FindArg( "-bspgen" ))      {
 231                                         vms_vector v;
 232                                         fix l;
 233
 234                                         vm_vec_sub(&v, &pmmax, &pmmin );
 235                                         l = v.x;
 236                                         if ( v.y > l ) l = v.y;
 237                                         if ( v.z > l ) l = v.z;
 238
 239                                         printf( " -l%.3f", f2fl(l) );
 240                                 }
 241
 242                                 break;
 243                         }
 244
 245                         case ID_SOBJ: {         //Subobject header
 246                                 int n;
 247
 248                                 anim_flag++;
 249
 250                                 //mprintf(0,"Got chunk SOBJ, len=%d\n",len);
 251
 252                                 n = pof_read_short(model_buf);
 253
 254                                 Assert(n < MAX_SUBMODELS);
 255
 256                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 257
 258                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 259                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 260                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 261
 262                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 263
 264                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 265
 266                                 break;
 267
 268                         }
 269
 270                         #ifndef DRIVE
 271                         case ID_GUNS: {         //List of guns on this object
 272
 273                                 //mprintf(0,"Got chunk GUNS, len=%d\n",len);
 274
 275                                 if (r) {
 276                                         int i;
 277                                         vms_vector gun_dir;
 278                                         ubyte gun_used[MAX_GUNS];
 279
 280                                         r->n_guns = pof_read_int(model_buf);
 281
 282                                         if ( r->n_guns )
 283                                                 anim_flag++;
 284
 285                                         Assert(r->n_guns <= MAX_GUNS);
 286
 287                                         for (i=0;i<r->n_guns;i++)
 288                                                 gun_used[i] = 0;
 289
 290                                         for (i=0;i<r->n_guns;i++) {
 291                                                 int id;
 292
 293                                                 id = pof_read_short(model_buf);
 294                                                 Assert(id < r->n_guns);
 295                                                 Assert(gun_used[id] == 0);
 296                                                 gun_used[id] = 1;
 297                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 298                                                 Assert(r->gun_submodels[id] != 0xff);
 299                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 300
 301                                                 if (version >= 7)
 302                                                         pof_read_vecs(&gun_dir,1,model_buf);
 303                                         }
 304                                 }
 305                                 else
 306                                         pof_cfseek(model_buf,len,SEEK_CUR);
 307
 308                                 break;
 309                         }
 310
 311                         case ID_ANIM:           //Animation data
 312                                 //mprintf(0,"Got chunk ANIM, len=%d\n",len);
 313
 314                                 anim_flag++;
 315
 316                                 if (r) {
 317                                         int n_frames,f,m;
 318
 319                                         n_frames = pof_read_short(model_buf);
 320
 321                                         Assert(n_frames == N_ANIM_STATES);
 322
 323                                         for (m=0;m<pm->n_models;m++)
 324                                                 for (f=0;f<n_frames;f++)
 325                                                         pof_cfread(&anim_angs[f][m],1,sizeof(vms_angvec),model_buf);
 326
 327                                         robot_set_angles(r,pm,anim_angs);
 328
 329                                 }
 330                                 else
 331                                         pof_cfseek(model_buf,len,SEEK_CUR);
 332
 333                                 break;
 334                         #endif
 335
 336                         case ID_TXTR: {         //Texture filename list
 337                                 int n;
 338                                 char name_buf[128];
 339
 340                                 //mprintf(0,"Got chunk TXTR, len=%d\n",len);
 341
 342                                 n = pof_read_short(model_buf);
 343                                 //mprintf(0,"  num textures = %d\n",n);
 344                                 while (n--) {
 345                                         pof_read_string(name_buf,128,model_buf);
 346                                         //mprintf(0,"<%s>\n",name_buf);
 347                                 }
 348
 349                                 break;
 350                         }
 351
 352                         case ID_IDTA:           //Interpreter data
 353                                 //mprintf(0,"Got chunk IDTA, len=%d\n",len);
 354
 355                                 pm->model_data = d_malloc(len);
 356                                 pm->model_data_size = len;
 357
 358                                 pof_cfread(pm->model_data,1,len,model_buf);
 359
 360                                 break;
 361
 362                         default:
 363                                 //mprintf(0,"Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 364                                 pof_cfseek(model_buf,len,SEEK_CUR);
 365                                 break;
 366
 367                 }
 368                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 369                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 370         }
 371
 372 //      for (i=0;i<pm->n_models;i++)
 373 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 374
 375         if ( FindArg( "-bspgen" )) {
 376                 char *p = strchr( filename, '.' );
 377                 *p = 0;
 378
 379                 if ( anim_flag > 1 )
 380                         printf( " -a" );
 381
 382                 printf( " %s.3ds\n", filename );
 383                 *p = '.';
 384         }
 385
 386         d_free(model_buf);
 387
 388         return pm;
 389 }
 390
 391 //reads the gun information for a model
 392 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 393 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 394 {
 395         CFILE *ifile;
 396         short version;
 397         int id,len;
 398         int n_guns=0;
 399         ubyte   *model_buf;
 400
 401         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 402         if (!model_buf)
 403                 Error("Can't allocate space to read model %s\n", filename);
 404
 405         if ((ifile=cfopen(filename,"rb"))==NULL)
 406                 Error("Can't open file <%s>",filename);
 407
 408         Assert(ifile->size <= MODEL_BUF_SIZE);
 409
 410         Pof_addr = 0;
 411         Pof_file_end = cfread(model_buf, 1, ifile->size, ifile);
 412         cfclose(ifile);
 413
 414         id = pof_read_int(model_buf);
 415
 416         if (id!=0x4f505350) /* 'OPSP' */
 417                 Error("Bad ID in model file <%s>",filename);
 418
 419         version = pof_read_short(model_buf);
 420
 421         Assert(version >= 7);           //must be 7 or higher for this data
 422
 423         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 424                 Error("Bad version (%d) in model file <%s>",version,filename);
 425
 426         while (new_pof_read_int(id,model_buf) == 1) {
 427
 428                 //id  = pof_read_int(model_buf);
 429                 len = pof_read_int(model_buf);
 430
 431                 if (id == ID_GUNS) {            //List of guns on this object
 432
 433                         //mprintf(0,"Got chunk GUNS, len=%d\n",len);
 434
 435                         int i;
 436
 437                         n_guns = pof_read_int(model_buf);
 438
 439                         for (i=0;i<n_guns;i++) {
 440                                 int id,sm;
 441
 442                                 id = pof_read_short(model_buf);
 443                                 sm = pof_read_short(model_buf);
 444                                 if (gun_submodels)
 445                                         gun_submodels[id] = sm;
 446                                 else if (sm!=0)
 447                                         Error("Invalid gun submodel in file <%s>",filename);
 448                                 pof_read_vecs(&gun_points[id],1,model_buf);
 449
 450                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 451                         }
 452
 453                 }
 454                 else
 455                         pof_cfseek(model_buf,len,SEEK_CUR);
 456
 457         }
 458
 459         d_free(model_buf);
 460
 461         return n_guns;
 462 }
 463
 464 //free up a model, getting rid of all its memory
 465 void free_model(polymodel *po)
 466 {
 467         d_free(po->model_data);
 468 }
 469
 470 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 471 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 472
 473 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 474
 475
 476 //draw a polygon model
 477
 478 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[])
 479 {
 480         polymodel *po;
 481         int i;
 482    PA_DFX (int save_light);
 483
 484         Assert(model_num < N_polygon_models);
 485
 486         po=&Polygon_models[model_num];
 487
 488         //check if should use simple model
 489         if (po->simpler_model )                                 //must have a simpler model
 490                 if (flags==0)                                                   //can't switch if this is debris
 491                         //!!if (!alt_textures) {                                //alternate textures might not match
 492                         //alt textures might not match, but in the one case we're using this
 493                         //for on 11/14/94, they do match.  So we leave it in.
 494                         {
 495                                 int cnt=1;
 496                                 fix depth;
 497
 498                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 499
 500                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 501                                         po = &Polygon_models[po->simpler_model-1];
 502                         }
 503
 504         if (alt_textures)
 505    {
 506                 for (i=0;i<po->n_textures;i++)  {
 507                         texture_list_index[i] = alt_textures[i];
 508                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 509
 510          #ifdef _3DFX
 511          texture_list[i]->bm_handle = texture_list_index[i].index;
 512          #endif
 513                 }
 514    }
 515         else
 516    {
 517                 for (i=0;i<po->n_textures;i++)  {
 518                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 519                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 520
 521          #ifdef _3DFX
 522          texture_list[i]->bm_handle = texture_list_index[i].index;
 523          #endif
 524                 }
 525    }
 526
 527 #ifdef PIGGY_USE_PAGING
 528         // Make sure the textures for this object are paged in...
 529         piggy_page_flushed = 0;
 530         for (i=0;i<po->n_textures;i++)
 531                 PIGGY_PAGE_IN( texture_list_index[i] );
 532         // Hmmm... cache got flushed in the middle of paging all these in,
 533         // so we need to reread them all in.
 534         if (piggy_page_flushed) {
 535                 piggy_page_flushed = 0;
 536                 for (i=0;i<po->n_textures;i++)
 537                         PIGGY_PAGE_IN( texture_list_index[i] );
 538         }
 539         // Make sure that they can all fit in memory.
 540         Assert( piggy_page_flushed == 0 );
 541 #endif
 542
 543         g3_start_instance_matrix(pos,orient);
 544
 545         g3_set_interp_points(robot_points);
 546
 547 #ifdef _3DFX
 548    _3dfx_rendering_poly_obj = 1;
 549 #endif
 550         PA_DFX(save_light = Lighting_on);
 551         PA_DFX(Lighting_on = 0);
 552
 553         if (flags == 0)         //draw entire object
 554
 555                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 556
 557         else {
 558                 int i;
 559
 560                 for (i=0;flags;flags>>=1,i++)
 561                         if (flags & 1) {
 562                                 vms_vector ofs;
 563
 564                                 Assert(i < po->n_models);
 565
 566                                 //if submodel, rotate around its center point, not pivot point
 567
 568                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 569                                 vm_vec_negate(&ofs);
 570                                 g3_start_instance_matrix(&ofs,NULL);
 571
 572                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 573
 574                                 g3_done_instance();
 575                         }
 576         }
 577
 578         g3_done_instance();
 579
 580 #ifdef _3DFX
 581    _3dfx_rendering_poly_obj = 0;
 582 #endif
 583
 584         PA_DFX (Lighting_on = save_light);
 585
 586
 587 }
 588
 589 void free_polygon_models()
 590 {
 591         int i;
 592
 593         for (i=0;i<N_polygon_models;i++) {
 594                 free_model(&Polygon_models[i]);
 595         }
 596
 597 }
 598
 599 void polyobj_find_min_max(polymodel *pm)
 600 {
 601         ushort nverts;
 602         vms_vector *vp;
 603         ushort *data,type;
 604         int m;
 605         vms_vector *big_mn,*big_mx;
 606
 607         big_mn = &pm->mins;
 608         big_mx = &pm->maxs;
 609
 610         for (m=0;m<pm->n_models;m++) {
 611                 vms_vector *mn,*mx,*ofs;
 612
 613                 mn = &pm->submodel_mins[m];
 614                 mx = &pm->submodel_maxs[m];
 615                 ofs= &pm->submodel_offsets[m];
 616
 617                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 618
 619                 type = *data++;
 620
 621                 Assert(type == 7 || type == 1);
 622
 623                 nverts = *data++;
 624
 625                 if (type==7)
 626                         data+=2;                //skip start & pad
 627
 628                 vp = (vms_vector *) data;
 629
 630                 *mn = *mx = *vp++; nverts--;
 631
 632                 if (m==0)
 633                         *big_mn = *big_mx = *mn;
 634
 635                 while (nverts--) {
 636                         if (vp->x > mx->x) mx->x = vp->x;
 637                         if (vp->y > mx->y) mx->y = vp->y;
 638                         if (vp->z > mx->z) mx->z = vp->z;
 639
 640                         if (vp->x < mn->x) mn->x = vp->x;
 641                         if (vp->y < mn->y) mn->y = vp->y;
 642                         if (vp->z < mn->z) mn->z = vp->z;
 643
 644                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 645                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 646                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 647
 648                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 649                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 650                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 651
 652                         vp++;
 653                 }
 654
 655 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 656         }
 657
 658 //      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);
 659
 660 }
 661
 662 extern short highest_texture_num;       //from the 3d
 663
 664 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 665
 666 //returns the number of this model
 667 #ifndef DRIVE
 668 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 669 #else
 670 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 671 #endif
 672 {
 673         #ifdef DRIVE
 674         #define r NULL
 675         #endif
 676
 677         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 678         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 679
 680         //      MK was real tired of those useless, slow mprintfs...
 681         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 682                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 683
 684         Assert(strlen(filename) <= 12);
 685         strcpy(Pof_names[N_polygon_models],filename);
 686
 687         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 688
 689         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 690
 691         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 692
 693         if (highest_texture_num+1 != n_textures)
 694                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 695
 696         Polygon_models[N_polygon_models].n_textures = n_textures;
 697         Polygon_models[N_polygon_models].first_texture = first_texture;
 698         Polygon_models[N_polygon_models].simpler_model = 0;
 699
 700 //      Assert(polygon_models[N_polygon_models]!=NULL);
 701
 702         N_polygon_models++;
 703
 704         return N_polygon_models-1;
 705
 706 }
 707
 708
 709 void init_polygon_models()
 710 {
 711         N_polygon_models = 0;
 712
 713         atexit((void (*)())free_polygon_models);
 714
 715 }
 716
 717 //compare against this size when figuring how far to place eye for picture
 718 #define BASE_MODEL_SIZE 0x28000
 719
 720 #define DEFAULT_VIEW_DIST 0x60000
 721
 722 //draws the given model in the current canvas.  The distance is set to
 723 //more-or-less fill the canvas.  Note that this routine actually renders
 724 //into an off-screen canvas that it creates, then copies to the current
 725 //canvas.
 726 void draw_model_picture(int mn,vms_angvec *orient_angles)
 727 {
 728         vms_vector      temp_pos=ZERO_VECTOR;
 729         vms_matrix      temp_orient = IDENTITY_MATRIX;
 730         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 731
 732         Assert(mn>=0 && mn<N_polygon_models);
 733
 734         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 735         gr_set_current_canvas(temp_canv);
 736         gr_clear_canvas( BM_XRGB(0,0,0) );
 737
 738         g3_start_frame();
 739         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 740
 741         if (Polygon_models[mn].rad != 0)
 742                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 743         else
 744                 temp_pos.z = DEFAULT_VIEW_DIST;
 745
 746         vm_angles_2_matrix(&temp_orient, orient_angles);
 747
 748         PA_DFX(save_light = Lighting_on);
 749         PA_DFX(Lighting_on = 0);
 750         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 751         PA_DFX (Lighting_on = save_light);
 752
 753         gr_set_current_canvas(save_canv);
 754
 755         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 756
 757         gr_free_canvas(temp_canv);
 758 }
 759