main/polyobj.c

   1 /* $Id: polyobj.c,v 1.8 2002-08-08 09:09:43 btb Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 #ifdef HAVE_CONFIG_H
  16 #include <conf.h>
  17 #endif
  18
  19 #ifdef RCS
  20 static char rcsid[] = "$Id: polyobj.c,v 1.8 2002-08-08 09:09:43 btb Exp $";
  21 #endif
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 // -- I hate this warning in make depend! -- #ifdef DRIVE
  28 // -- I hate this warning in make depend! -- #include "drive.h"
  29 // -- I hate this warning in make depend! -- #else
  30 #include "inferno.h"
  31 // -- I hate this warning in make depend! -- #endif
  32
  33 #include "polyobj.h"
  34
  35 #include "vecmat.h"
  36 #include "3d.h"
  37 #include "error.h"
  38 #include "mono.h"
  39 #include "u_mem.h"
  40 #include "args.h"
  41
  42 #ifndef DRIVE
  43 #include "texmap.h"
  44 #include "bm.h"
  45 #include "textures.h"
  46 #include "object.h"
  47 #include "lighting.h"
  48 #include "cfile.h"
  49 #include "piggy.h"
  50 #endif
  51
  52 #include "pa_enabl.h"
  53
  54 #ifdef _3DFX
  55 #include "3dfx_des.h"
  56 #endif
  57
  58 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  59
  60 int N_polygon_models = 0;
  61
  62 #define MAX_POLYGON_VECS 1000
  63 g3s_point robot_points[MAX_POLYGON_VECS];
  64
  65 #define PM_COMPATIBLE_VERSION 6
  66 #define PM_OBJFILE_VERSION 8
  67
  68 int     Pof_file_end;
  69 int     Pof_addr;
  70
  71 #define MODEL_BUF_SIZE  32768
  72
  73 void _pof_cfseek(int len,int type)
  74 {
  75         switch (type) {
  76                 case SEEK_SET:  Pof_addr = len; break;
  77                 case SEEK_CUR:  Pof_addr += len;        break;
  78                 case SEEK_END:
  79                         Assert(len <= 0);       //      seeking from end, better be moving back.
  80                         Pof_addr = Pof_file_end + len;
  81                         break;
  82         }
  83
  84         if (Pof_addr > MODEL_BUF_SIZE)
  85                 Int3();
  86 }
  87
  88 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  89
  90 int pof_read_int(ubyte *bufp)
  91 {
  92         int i;
  93
  94         i = *((int *) &bufp[Pof_addr]);
  95         Pof_addr += 4;
  96         return i;
  97
  98 //      if (cfread(&i,sizeof(i),1,f) != 1)
  99 //              Error("Unexpected end-of-file while reading object");
 100 //
 101 //      return i;
 102 }
 103
 104 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 105 {
 106         if (Pof_addr + nelem*elsize > Pof_file_end)
 107                 return 0;
 108
 109         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 110
 111         Pof_addr += elsize*nelem;
 112
 113         if (Pof_addr > MODEL_BUF_SIZE)
 114                 Int3();
 115
 116         return nelem;
 117 }
 118
 119 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 120 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 121
 122 short pof_read_short(ubyte *bufp)
 123 {
 124         short s;
 125
 126         s = *((short *) &bufp[Pof_addr]);
 127         Pof_addr += 2;
 128         return s;
 129 //      if (cfread(&s,sizeof(s),1,f) != 1)
 130 //              Error("Unexpected end-of-file while reading object");
 131 //
 132 //      return s;
 133 }
 134
 135 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 136 {
 137         int     i;
 138
 139         for (i=0; i<max_char; i++) {
 140                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 141                         break;
 142         }
 143
 144 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 145
 146 }
 147
 148 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 149 {
 150 //      cfread(vecs,sizeof(vms_vector),n,f);
 151
 152         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 153         Pof_addr += n*sizeof(*vecs);
 154
 155         if (Pof_addr > MODEL_BUF_SIZE)
 156                 Int3();
 157 }
 158
 159 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 160 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 161 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 162 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 163 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 164 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 165
 166 #ifdef DRIVE
 167 #define robot_info void
 168 #else
 169 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 170
 171 //set the animation angles for this robot.  Gun fields of robot info must
 172 //be filled in.
 173 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 174 #endif
 175
 176 #define DEBUG_LEVEL CON_NORMAL
 177
 178 //reads a binary file containing a 3d model
 179 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 180 {
 181         CFILE *ifile;
 182         short version;
 183         int id,len, next_chunk;
 184         int anim_flag = 0;
 185         ubyte *model_buf;
 186
 187 #ifdef WORDS_BIGENDIAN
 188         Error("read_model_file(): This function is not bigendian-friendly!\n");
 189 #endif
 190         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 191         if (!model_buf)
 192                 Error("Can't allocate space to read model %s\n", filename);
 193
 194         if ((ifile=cfopen(filename,"rb"))==NULL)
 195                 Error("Can't open file <%s>",filename);
 196
 197         Assert(ifile->size <= MODEL_BUF_SIZE);
 198
 199         Pof_addr = 0;
 200         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 201         cfclose(ifile);
 202
 203         id = pof_read_int(model_buf);
 204
 205         if (id!=0x4f505350) /* 'OPSP' */
 206                 Error("Bad ID in model file <%s>",filename);
 207
 208         version = pof_read_short(model_buf);
 209
 210         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 211                 Error("Bad version (%d) in model file <%s>",version,filename);
 212
 213         if ( FindArg( "-bspgen" ))
 214                 printf( "bspgen -c1" );
 215
 216         while (new_pof_read_int(id,model_buf) == 1) {
 217
 218                 //id  = pof_read_int(model_buf);
 219                 len = pof_read_int(model_buf);
 220                 next_chunk = Pof_addr + len;
 221
 222                 switch (id) {
 223
 224                         case ID_OHDR: {         //Object header
 225                                 vms_vector pmmin,pmmax;
 226
 227                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 228
 229                                 pm->n_models = pof_read_int(model_buf);
 230                                 pm->rad = pof_read_int(model_buf);
 231
 232                                 Assert(pm->n_models <= MAX_SUBMODELS);
 233
 234                                 pof_read_vecs(&pmmin,1,model_buf);
 235                                 pof_read_vecs(&pmmax,1,model_buf);
 236
 237                                 if ( FindArg( "-bspgen" ))      {
 238                                         vms_vector v;
 239                                         fix l;
 240
 241                                         vm_vec_sub(&v, &pmmax, &pmmin );
 242                                         l = v.x;
 243                                         if ( v.y > l ) l = v.y;
 244                                         if ( v.z > l ) l = v.z;
 245
 246                                         printf( " -l%.3f", f2fl(l) );
 247                                 }
 248
 249                                 break;
 250                         }
 251
 252                         case ID_SOBJ: {         //Subobject header
 253                                 int n;
 254
 255                                 anim_flag++;
 256
 257                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 258
 259                                 n = pof_read_short(model_buf);
 260
 261                                 Assert(n < MAX_SUBMODELS);
 262
 263                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 264
 265                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 266                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 267                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 268
 269                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 270
 271                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 272
 273                                 break;
 274
 275                         }
 276
 277                         #ifndef DRIVE
 278                         case ID_GUNS: {         //List of guns on this object
 279
 280                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 281
 282                                 if (r) {
 283                                         int i;
 284                                         vms_vector gun_dir;
 285                                         ubyte gun_used[MAX_GUNS];
 286
 287                                         r->n_guns = pof_read_int(model_buf);
 288
 289                                         if ( r->n_guns )
 290                                                 anim_flag++;
 291
 292                                         Assert(r->n_guns <= MAX_GUNS);
 293
 294                                         for (i=0;i<r->n_guns;i++)
 295                                                 gun_used[i] = 0;
 296
 297                                         for (i=0;i<r->n_guns;i++) {
 298                                                 int id;
 299
 300                                                 id = pof_read_short(model_buf);
 301                                                 Assert(id < r->n_guns);
 302                                                 Assert(gun_used[id] == 0);
 303                                                 gun_used[id] = 1;
 304                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 305                                                 Assert(r->gun_submodels[id] != 0xff);
 306                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 307
 308                                                 if (version >= 7)
 309                                                         pof_read_vecs(&gun_dir,1,model_buf);
 310                                         }
 311                                 }
 312                                 else
 313                                         pof_cfseek(model_buf,len,SEEK_CUR);
 314
 315                                 break;
 316                         }
 317
 318                         case ID_ANIM:           //Animation data
 319                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 320
 321                                 anim_flag++;
 322
 323                                 if (r) {
 324                                         int n_frames,f,m;
 325
 326                                         n_frames = pof_read_short(model_buf);
 327
 328                                         Assert(n_frames == N_ANIM_STATES);
 329
 330                                         for (m=0;m<pm->n_models;m++)
 331                                                 for (f=0;f<n_frames;f++)
 332                                                         pof_cfread(&anim_angs[f][m],1,sizeof(vms_angvec),model_buf);
 333
 334                                         robot_set_angles(r,pm,anim_angs);
 335
 336                                 }
 337                                 else
 338                                         pof_cfseek(model_buf,len,SEEK_CUR);
 339
 340                                 break;
 341                         #endif
 342
 343                         case ID_TXTR: {         //Texture filename list
 344                                 int n;
 345                                 char name_buf[128];
 346
 347                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 348
 349                                 n = pof_read_short(model_buf);
 350                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 351                                 while (n--) {
 352                                         pof_read_string(name_buf,128,model_buf);
 353                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 354                                 }
 355
 356                                 break;
 357                         }
 358
 359                         case ID_IDTA:           //Interpreter data
 360                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 361
 362                                 pm->model_data = d_malloc(len);
 363                                 pm->model_data_size = len;
 364
 365                                 pof_cfread(pm->model_data,1,len,model_buf);
 366
 367                                 break;
 368
 369                         default:
 370                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 371                                 pof_cfseek(model_buf,len,SEEK_CUR);
 372                                 break;
 373
 374                 }
 375                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 376                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 377         }
 378
 379 //      for (i=0;i<pm->n_models;i++)
 380 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 381
 382         if ( FindArg( "-bspgen" )) {
 383                 char *p = strchr( filename, '.' );
 384                 *p = 0;
 385
 386                 if ( anim_flag > 1 )
 387                         printf( " -a" );
 388
 389                 printf( " %s.3ds\n", filename );
 390                 *p = '.';
 391         }
 392
 393         d_free(model_buf);
 394
 395         return pm;
 396 }
 397
 398 //reads the gun information for a model
 399 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 400 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 401 {
 402         CFILE *ifile;
 403         short version;
 404         int id,len;
 405         int n_guns=0;
 406         ubyte   *model_buf;
 407
 408         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 409         if (!model_buf)
 410                 Error("Can't allocate space to read model %s\n", filename);
 411
 412         if ((ifile=cfopen(filename,"rb"))==NULL)
 413                 Error("Can't open file <%s>",filename);
 414
 415         Assert(ifile->size <= MODEL_BUF_SIZE);
 416
 417         Pof_addr = 0;
 418         Pof_file_end = cfread(model_buf, 1, ifile->size, ifile);
 419         cfclose(ifile);
 420
 421         id = pof_read_int(model_buf);
 422
 423         if (id!=0x4f505350) /* 'OPSP' */
 424                 Error("Bad ID in model file <%s>",filename);
 425
 426         version = pof_read_short(model_buf);
 427
 428         Assert(version >= 7);           //must be 7 or higher for this data
 429
 430         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 431                 Error("Bad version (%d) in model file <%s>",version,filename);
 432
 433         while (new_pof_read_int(id,model_buf) == 1) {
 434
 435                 //id  = pof_read_int(model_buf);
 436                 len = pof_read_int(model_buf);
 437
 438                 if (id == ID_GUNS) {            //List of guns on this object
 439
 440                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 441
 442                         int i;
 443
 444                         n_guns = pof_read_int(model_buf);
 445
 446                         for (i=0;i<n_guns;i++) {
 447                                 int id,sm;
 448
 449                                 id = pof_read_short(model_buf);
 450                                 sm = pof_read_short(model_buf);
 451                                 if (gun_submodels)
 452                                         gun_submodels[id] = sm;
 453                                 else if (sm!=0)
 454                                         Error("Invalid gun submodel in file <%s>",filename);
 455                                 pof_read_vecs(&gun_points[id],1,model_buf);
 456
 457                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 458                         }
 459
 460                 }
 461                 else
 462                         pof_cfseek(model_buf,len,SEEK_CUR);
 463
 464         }
 465
 466         d_free(model_buf);
 467
 468         return n_guns;
 469 }
 470
 471 //free up a model, getting rid of all its memory
 472 void free_model(polymodel *po)
 473 {
 474         d_free(po->model_data);
 475 }
 476
 477 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 478 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 479
 480 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 481
 482
 483 //draw a polygon model
 484
 485 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[])
 486 {
 487         polymodel *po;
 488         int i;
 489         PA_DFX (int save_light);
 490
 491         Assert(model_num < N_polygon_models);
 492
 493         po=&Polygon_models[model_num];
 494
 495         //check if should use simple model
 496         if (po->simpler_model )                                 //must have a simpler model
 497                 if (flags==0)                                                   //can't switch if this is debris
 498                         //!!if (!alt_textures) {                                //alternate textures might not match
 499                         //alt textures might not match, but in the one case we're using this
 500                         //for on 11/14/94, they do match.  So we leave it in.
 501                         {
 502                                 int cnt=1;
 503                                 fix depth;
 504
 505                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 506
 507                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 508                                         po = &Polygon_models[po->simpler_model-1];
 509                         }
 510
 511         if (alt_textures)
 512    {
 513                 for (i=0;i<po->n_textures;i++)  {
 514                         texture_list_index[i] = alt_textures[i];
 515                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 516
 517          #ifdef _3DFX
 518          texture_list[i]->bm_handle = texture_list_index[i].index;
 519          #endif
 520                 }
 521    }
 522         else
 523    {
 524                 for (i=0;i<po->n_textures;i++)  {
 525                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 526                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 527
 528          #ifdef _3DFX
 529          texture_list[i]->bm_handle = texture_list_index[i].index;
 530          #endif
 531                 }
 532    }
 533
 534 #ifdef PIGGY_USE_PAGING
 535         // Make sure the textures for this object are paged in...
 536         piggy_page_flushed = 0;
 537         for (i=0;i<po->n_textures;i++)
 538                 PIGGY_PAGE_IN( texture_list_index[i] );
 539         // Hmmm... cache got flushed in the middle of paging all these in,
 540         // so we need to reread them all in.
 541         if (piggy_page_flushed) {
 542                 piggy_page_flushed = 0;
 543                 for (i=0;i<po->n_textures;i++)
 544                         PIGGY_PAGE_IN( texture_list_index[i] );
 545         }
 546         // Make sure that they can all fit in memory.
 547         Assert( piggy_page_flushed == 0 );
 548 #endif
 549
 550         g3_start_instance_matrix(pos,orient);
 551
 552         g3_set_interp_points(robot_points);
 553
 554 #ifdef _3DFX
 555    _3dfx_rendering_poly_obj = 1;
 556 #endif
 557         PA_DFX(save_light = Lighting_on);
 558         PA_DFX(Lighting_on = 0);
 559
 560         if (flags == 0)         //draw entire object
 561
 562                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 563
 564         else {
 565                 int i;
 566
 567                 for (i=0;flags;flags>>=1,i++)
 568                         if (flags & 1) {
 569                                 vms_vector ofs;
 570
 571                                 Assert(i < po->n_models);
 572
 573                                 //if submodel, rotate around its center point, not pivot point
 574
 575                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 576                                 vm_vec_negate(&ofs);
 577                                 g3_start_instance_matrix(&ofs,NULL);
 578
 579                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 580
 581                                 g3_done_instance();
 582                         }
 583         }
 584
 585         g3_done_instance();
 586
 587 #ifdef _3DFX
 588    _3dfx_rendering_poly_obj = 0;
 589 #endif
 590
 591         PA_DFX (Lighting_on = save_light);
 592
 593
 594 }
 595
 596 void free_polygon_models()
 597 {
 598         int i;
 599
 600         for (i=0;i<N_polygon_models;i++) {
 601                 free_model(&Polygon_models[i]);
 602         }
 603
 604 }
 605
 606 void polyobj_find_min_max(polymodel *pm)
 607 {
 608         ushort nverts;
 609         vms_vector *vp;
 610         ushort *data,type;
 611         int m;
 612         vms_vector *big_mn,*big_mx;
 613
 614         big_mn = &pm->mins;
 615         big_mx = &pm->maxs;
 616
 617         for (m=0;m<pm->n_models;m++) {
 618                 vms_vector *mn,*mx,*ofs;
 619
 620                 mn = &pm->submodel_mins[m];
 621                 mx = &pm->submodel_maxs[m];
 622                 ofs= &pm->submodel_offsets[m];
 623
 624                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 625
 626                 type = *data++;
 627
 628                 Assert(type == 7 || type == 1);
 629
 630                 nverts = *data++;
 631
 632                 if (type==7)
 633                         data+=2;                //skip start & pad
 634
 635                 vp = (vms_vector *) data;
 636
 637                 *mn = *mx = *vp++; nverts--;
 638
 639                 if (m==0)
 640                         *big_mn = *big_mx = *mn;
 641
 642                 while (nverts--) {
 643                         if (vp->x > mx->x) mx->x = vp->x;
 644                         if (vp->y > mx->y) mx->y = vp->y;
 645                         if (vp->z > mx->z) mx->z = vp->z;
 646
 647                         if (vp->x < mn->x) mn->x = vp->x;
 648                         if (vp->y < mn->y) mn->y = vp->y;
 649                         if (vp->z < mn->z) mn->z = vp->z;
 650
 651                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 652                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 653                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 654
 655                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 656                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 657                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 658
 659                         vp++;
 660                 }
 661
 662 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 663         }
 664
 665 //      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);
 666
 667 }
 668
 669 extern short highest_texture_num;       //from the 3d
 670
 671 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 672
 673 //returns the number of this model
 674 #ifndef DRIVE
 675 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 676 #else
 677 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 678 #endif
 679 {
 680         #ifdef DRIVE
 681         #define r NULL
 682         #endif
 683
 684         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 685         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 686
 687         //      MK was real tired of those useless, slow mprintfs...
 688         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 689                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 690
 691         Assert(strlen(filename) <= 12);
 692         strcpy(Pof_names[N_polygon_models],filename);
 693
 694         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 695
 696         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 697
 698         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 699
 700         if (highest_texture_num+1 != n_textures)
 701                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 702
 703         Polygon_models[N_polygon_models].n_textures = n_textures;
 704         Polygon_models[N_polygon_models].first_texture = first_texture;
 705         Polygon_models[N_polygon_models].simpler_model = 0;
 706
 707 //      Assert(polygon_models[N_polygon_models]!=NULL);
 708
 709         N_polygon_models++;
 710
 711         return N_polygon_models-1;
 712
 713 }
 714
 715
 716 void init_polygon_models()
 717 {
 718         N_polygon_models = 0;
 719
 720         atexit((void (*)())free_polygon_models);
 721
 722 }
 723
 724 //compare against this size when figuring how far to place eye for picture
 725 #define BASE_MODEL_SIZE 0x28000
 726
 727 #define DEFAULT_VIEW_DIST 0x60000
 728
 729 //draws the given model in the current canvas.  The distance is set to
 730 //more-or-less fill the canvas.  Note that this routine actually renders
 731 //into an off-screen canvas that it creates, then copies to the current
 732 //canvas.
 733 void draw_model_picture(int mn,vms_angvec *orient_angles)
 734 {
 735         vms_vector      temp_pos=ZERO_VECTOR;
 736         vms_matrix      temp_orient = IDENTITY_MATRIX;
 737         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 738
 739         Assert(mn>=0 && mn<N_polygon_models);
 740
 741         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 742         gr_set_current_canvas(temp_canv);
 743         gr_clear_canvas( BM_XRGB(0,0,0) );
 744
 745         g3_start_frame();
 746         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 747
 748         if (Polygon_models[mn].rad != 0)
 749                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 750         else
 751                 temp_pos.z = DEFAULT_VIEW_DIST;
 752
 753         vm_angles_2_matrix(&temp_orient, orient_angles);
 754
 755         PA_DFX(save_light = Lighting_on);
 756         PA_DFX(Lighting_on = 0);
 757         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 758         PA_DFX (Lighting_on = save_light);
 759
 760         gr_set_current_canvas(save_canv);
 761
 762         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 763
 764         gr_free_canvas(temp_canv);
 765 }
 766
 767 #ifndef FAST_FILE_IO
 768 /*
 769  * reads a polymodel structure from a CFILE
 770  */
 771 extern void polymodel_read(polymodel *pm, CFILE *fp)
 772 {
 773         int i;
 774
 775         pm->n_models = cfile_read_int(fp);
 776         pm->model_data_size = cfile_read_int(fp);
 777         pm->model_data = (ubyte *) cfile_read_int(fp);
 778         for (i = 0; i < MAX_SUBMODELS; i++)
 779                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 780         for (i = 0; i < MAX_SUBMODELS; i++)
 781                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 782         for (i = 0; i < MAX_SUBMODELS; i++)
 783                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 784         for (i = 0; i < MAX_SUBMODELS; i++)
 785                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 786         for (i = 0; i < MAX_SUBMODELS; i++)
 787                 pm->submodel_rads[i] = cfile_read_fix(fp);
 788         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 789         for (i = 0; i < MAX_SUBMODELS; i++)
 790                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 791         for (i = 0; i < MAX_SUBMODELS; i++)
 792                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 793         cfile_read_vector(&(pm->mins), fp);
 794         cfile_read_vector(&(pm->maxs), fp);
 795         pm->rad = cfile_read_fix(fp);
 796         pm->n_textures = cfile_read_byte(fp);
 797         pm->first_texture = cfile_read_short(fp);
 798         pm->simpler_model = cfile_read_byte(fp);
 799 }
 800
 801 /*
 802  * reads n polymodel structs from a CFILE
 803  */
 804 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 805 {
 806         int i, j;
 807
 808         for (i = 0; i < n; i++) {
 809                 pm[i].n_models = cfile_read_int(fp);
 810                 pm[i].model_data_size = cfile_read_int(fp);
 811                 pm[i].model_data = (ubyte *) cfile_read_int(fp);
 812                 for (j = 0; j < MAX_SUBMODELS; j++)
 813                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 814                 for (j = 0; j < MAX_SUBMODELS; j++)
 815                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 816                 for (j = 0; j < MAX_SUBMODELS; j++)
 817                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 818                 for (j = 0; j < MAX_SUBMODELS; j++)
 819                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 820                 for (j = 0; j < MAX_SUBMODELS; j++)
 821                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 822                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 823                 for (j = 0; j < MAX_SUBMODELS; j++)
 824                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 825                 for (j = 0; j < MAX_SUBMODELS; j++)
 826                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 827                 cfile_read_vector(&(pm[i].mins), fp);
 828                 cfile_read_vector(&(pm[i].maxs), fp);
 829                 pm[i].rad = cfile_read_fix(fp);
 830                 pm[i].n_textures = cfile_read_byte(fp);
 831                 pm[i].first_texture = cfile_read_short(fp);
 832                 pm[i].simpler_model = cfile_read_byte(fp);
 833         }
 834         return i;
 835 }
 836 #endif