main/polyobj.c

   1 /* $Id: polyobj.c,v 1.22 2005-07-30 07:46:03 chris 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 /*
  16  *
  17  * Hacked-in polygon objects
  18  *
  19  */
  20
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #ifdef RCS
  27 static char rcsid[] = "$Id: polyobj.c,v 1.22 2005-07-30 07:46:03 chris Exp $";
  28 #endif
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 // -- I hate this warning in make depend! -- #ifdef DRIVE
  35 // -- I hate this warning in make depend! -- #include "drive.h"
  36 // -- I hate this warning in make depend! -- #else
  37 #include "inferno.h"
  38 // -- I hate this warning in make depend! -- #endif
  39
  40 #include "polyobj.h"
  41
  42 #include "vecmat.h"
  43 #include "interp.h"
  44 #include "error.h"
  45 #include "mono.h"
  46 #include "u_mem.h"
  47 #include "args.h"
  48 #include "byteswap.h"
  49
  50 #ifndef DRIVE
  51 #include "texmap.h"
  52 #include "bm.h"
  53 #include "textures.h"
  54 #include "object.h"
  55 #include "lighting.h"
  56 #include "cfile.h"
  57 #include "piggy.h"
  58 #endif
  59
  60 #ifdef OGL
  61 #include "ogl_init.h"
  62 #endif
  63
  64 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  65
  66 int N_polygon_models = 0;
  67
  68 #define MAX_POLYGON_VECS 1000
  69 g3s_point robot_points[MAX_POLYGON_VECS];
  70
  71 #define PM_COMPATIBLE_VERSION 6
  72 #define PM_OBJFILE_VERSION 8
  73
  74 int     Pof_file_end;
  75 int     Pof_addr;
  76
  77 #define MODEL_BUF_SIZE  32768
  78
  79 void _pof_cfseek(int len,int type)
  80 {
  81         switch (type) {
  82                 case SEEK_SET:  Pof_addr = len; break;
  83                 case SEEK_CUR:  Pof_addr += len;        break;
  84                 case SEEK_END:
  85                         Assert(len <= 0);       //      seeking from end, better be moving back.
  86                         Pof_addr = Pof_file_end + len;
  87                         break;
  88         }
  89
  90         if (Pof_addr > MODEL_BUF_SIZE)
  91                 Int3();
  92 }
  93
  94 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  95
  96 int pof_read_int(ubyte *bufp)
  97 {
  98         int i;
  99
 100         i = *((int *) &bufp[Pof_addr]);
 101         Pof_addr += 4;
 102         return INTEL_INT(i);
 103
 104 //      if (cfread(&i,sizeof(i),1,f) != 1)
 105 //              Error("Unexpected end-of-file while reading object");
 106 //
 107 //      return i;
 108 }
 109
 110 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 111 {
 112         if (Pof_addr + nelem*elsize > Pof_file_end)
 113                 return 0;
 114
 115         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 116
 117         Pof_addr += elsize*nelem;
 118
 119         if (Pof_addr > MODEL_BUF_SIZE)
 120                 Int3();
 121
 122         return nelem;
 123 }
 124
 125 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 126 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 127
 128 short pof_read_short(ubyte *bufp)
 129 {
 130         short s;
 131
 132         s = *((short *) &bufp[Pof_addr]);
 133         Pof_addr += 2;
 134         return INTEL_SHORT(s);
 135 //      if (cfread(&s,sizeof(s),1,f) != 1)
 136 //              Error("Unexpected end-of-file while reading object");
 137 //
 138 //      return s;
 139 }
 140
 141 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 142 {
 143         int     i;
 144
 145         for (i=0; i<max_char; i++) {
 146                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 147                         break;
 148         }
 149
 150 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 151
 152 }
 153
 154 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 155 {
 156 //      cfread(vecs,sizeof(vms_vector),n,f);
 157
 158         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 159         Pof_addr += n*sizeof(*vecs);
 160
 161 #ifdef WORDS_BIGENDIAN
 162         while (n > 0)
 163                 vms_vector_swap(&vecs[--n]);
 164 #endif
 165
 166         if (Pof_addr > MODEL_BUF_SIZE)
 167                 Int3();
 168 }
 169
 170 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 171 {
 172         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 173         Pof_addr += n*sizeof(*angs);
 174
 175 #ifdef WORDS_BIGENDIAN
 176         while (n > 0)
 177                 vms_angvec_swap(&angs[--n]);
 178 #endif
 179
 180         if (Pof_addr > MODEL_BUF_SIZE)
 181                 Int3();
 182 }
 183
 184 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 185 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 186 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 187 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 188 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 189 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 190
 191 #ifdef DRIVE
 192 #define robot_info void
 193 #else
 194 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 195
 196 //set the animation angles for this robot.  Gun fields of robot info must
 197 //be filled in.
 198 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 199 #endif
 200
 201 #define DEBUG_LEVEL CON_NORMAL
 202
 203 #ifdef WORDS_NEED_ALIGNMENT
 204 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 205 {
 206         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 207 }
 208 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 209 {
 210         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 211 }
 212 /*
 213  * find chunk with smallest address
 214  */
 215 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 216 {
 217         int i, first_index = 0;
 218         Assert(no_chunks >= 1);
 219         for (i = 1; i < no_chunks; i++)
 220                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 221                         first_index = i;
 222         return first_index;
 223 }
 224 #define SHIFT_SPACE 500 // increase if insufficent
 225
 226 void align_polygon_model_data(polymodel *pm)
 227 {
 228         int i, chunk_len;
 229         int total_correction = 0;
 230         ubyte *cur_old, *cur_new;
 231         chunk cur_ch;
 232         chunk ch_list[MAX_CHUNKS];
 233         int no_chunks = 0;
 234         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 235         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 236
 237         Assert(tmp != NULL);
 238         //start with first chunk (is always aligned!)
 239         cur_old = pm->model_data;
 240         cur_new = tmp;
 241         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 242         memcpy(cur_new, cur_old, chunk_len);
 243         while (no_chunks > 0) {
 244                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 245                 cur_ch = ch_list[first_index];
 246                 // remove first chunk from array:
 247                 no_chunks--;
 248                 for (i = first_index; i < no_chunks; i++)
 249                         ch_list[i] = ch_list[i + 1];
 250                 // if (new) address unaligned:
 251                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 252                         // calculate how much to move to be aligned
 253                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 254                         // correct chunks' addresses
 255                         cur_ch.correction += to_shift;
 256                         for (i = 0; i < no_chunks; i++)
 257                                 ch_list[i].correction += to_shift;
 258                         total_correction += to_shift;
 259                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 260                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 261                 }
 262                 //write (corrected) chunk for current chunk:
 263                 *((short *)(cur_ch.new_base + cur_ch.offset))
 264                   = INTEL_SHORT(cur_ch.correction
 265                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 266                 //write (correctly aligned) chunk:
 267                 cur_old = old_dest(cur_ch);
 268                 cur_new = new_dest(cur_ch);
 269                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 270                 memcpy(cur_new, cur_old, chunk_len);
 271                 //correct submodel_ptr's for pm, too
 272                 for (i = 0; i < MAX_SUBMODELS; i++)
 273                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 274                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 275                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 276         }
 277         d_free(pm->model_data);
 278         pm->model_data_size += total_correction;
 279         pm->model_data = d_malloc(pm->model_data_size);
 280         Assert(pm->model_data != NULL);
 281         memcpy(pm->model_data, tmp, pm->model_data_size);
 282         d_free(tmp);
 283 }
 284 #endif //def WORDS_NEED_ALIGNMENT
 285
 286 //reads a binary file containing a 3d model
 287 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 288 {
 289         CFILE *ifile;
 290         short version;
 291         int id,len, next_chunk;
 292         int anim_flag = 0;
 293         ubyte *model_buf;
 294
 295         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 296         if (!model_buf)
 297                 Error("Can't allocate space to read model %s\n", filename);
 298
 299         if ((ifile=cfopen(filename,"rb"))==NULL)
 300                 Error("Can't open file <%s>",filename);
 301
 302         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 303
 304         Pof_addr = 0;
 305         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 306         cfclose(ifile);
 307
 308         id = pof_read_int(model_buf);
 309
 310         if (id!=0x4f505350) /* 'OPSP' */
 311                 Error("Bad ID in model file <%s>",filename);
 312
 313         version = pof_read_short(model_buf);
 314
 315         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 316                 Error("Bad version (%d) in model file <%s>",version,filename);
 317
 318         if ( FindArg( "-bspgen" ))
 319                 printf( "bspgen -c1" );
 320
 321         while (new_pof_read_int(id,model_buf) == 1) {
 322                 id = INTEL_INT(id);
 323                 //id  = pof_read_int(model_buf);
 324                 len = pof_read_int(model_buf);
 325                 next_chunk = Pof_addr + len;
 326
 327                 switch (id) {
 328
 329                         case ID_OHDR: {         //Object header
 330                                 vms_vector pmmin,pmmax;
 331
 332                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 333
 334                                 pm->n_models = pof_read_int(model_buf);
 335                                 pm->rad = pof_read_int(model_buf);
 336
 337                                 Assert(pm->n_models <= MAX_SUBMODELS);
 338
 339                                 pof_read_vecs(&pmmin,1,model_buf);
 340                                 pof_read_vecs(&pmmax,1,model_buf);
 341
 342                                 if ( FindArg( "-bspgen" ))      {
 343                                         vms_vector v;
 344                                         fix l;
 345
 346                                         vm_vec_sub(&v, &pmmax, &pmmin );
 347                                         l = v.x;
 348                                         if ( v.y > l ) l = v.y;
 349                                         if ( v.z > l ) l = v.z;
 350
 351                                         printf( " -l%.3f", f2fl(l) );
 352                                 }
 353
 354                                 break;
 355                         }
 356
 357                         case ID_SOBJ: {         //Subobject header
 358                                 int n;
 359
 360                                 anim_flag++;
 361
 362                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 363
 364                                 n = pof_read_short(model_buf);
 365
 366                                 Assert(n < MAX_SUBMODELS);
 367
 368                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 369
 370                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 371                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 372                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 373
 374                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 375
 376                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 377
 378                                 break;
 379
 380                         }
 381
 382                         #ifndef DRIVE
 383                         case ID_GUNS: {         //List of guns on this object
 384
 385                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 386
 387                                 if (r) {
 388                                         int i;
 389                                         vms_vector gun_dir;
 390                                         ubyte gun_used[MAX_GUNS];
 391
 392                                         r->n_guns = pof_read_int(model_buf);
 393
 394                                         if ( r->n_guns )
 395                                                 anim_flag++;
 396
 397                                         Assert(r->n_guns <= MAX_GUNS);
 398
 399                                         for (i=0;i<r->n_guns;i++)
 400                                                 gun_used[i] = 0;
 401
 402                                         for (i=0;i<r->n_guns;i++) {
 403                                                 int id;
 404
 405                                                 id = pof_read_short(model_buf);
 406                                                 Assert(id < r->n_guns);
 407                                                 Assert(gun_used[id] == 0);
 408                                                 gun_used[id] = 1;
 409                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 410                                                 Assert(r->gun_submodels[id] != 0xff);
 411                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 412
 413                                                 if (version >= 7)
 414                                                         pof_read_vecs(&gun_dir,1,model_buf);
 415                                         }
 416                                 }
 417                                 else
 418                                         pof_cfseek(model_buf,len,SEEK_CUR);
 419
 420                                 break;
 421                         }
 422
 423                         case ID_ANIM:           //Animation data
 424                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 425
 426                                 anim_flag++;
 427
 428                                 if (r) {
 429                                         int n_frames,f,m;
 430
 431                                         n_frames = pof_read_short(model_buf);
 432
 433                                         Assert(n_frames == N_ANIM_STATES);
 434
 435                                         for (m=0;m<pm->n_models;m++)
 436                                                 for (f=0;f<n_frames;f++)
 437                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 438
 439
 440                                         robot_set_angles(r,pm,anim_angs);
 441
 442                                 }
 443                                 else
 444                                         pof_cfseek(model_buf,len,SEEK_CUR);
 445
 446                                 break;
 447                         #endif
 448
 449                         case ID_TXTR: {         //Texture filename list
 450                                 int n;
 451                                 char name_buf[128];
 452
 453                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 454
 455                                 n = pof_read_short(model_buf);
 456                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 457                                 while (n--) {
 458                                         pof_read_string(name_buf,128,model_buf);
 459                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 460                                 }
 461
 462                                 break;
 463                         }
 464
 465                         case ID_IDTA:           //Interpreter data
 466                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 467
 468                                 pm->model_data = d_malloc(len);
 469                                 pm->model_data_size = len;
 470
 471                                 pof_cfread(pm->model_data,1,len,model_buf);
 472
 473                                 break;
 474
 475                         default:
 476                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 477                                 pof_cfseek(model_buf,len,SEEK_CUR);
 478                                 break;
 479
 480                 }
 481                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 482                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 483         }
 484
 485 //      for (i=0;i<pm->n_models;i++)
 486 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 487
 488         if ( FindArg( "-bspgen" )) {
 489                 char *p = strchr( filename, '.' );
 490                 *p = 0;
 491
 492                 if ( anim_flag > 1 )
 493                         printf( " -a" );
 494
 495                 printf( " %s.3ds\n", filename );
 496                 *p = '.';
 497         }
 498
 499         d_free(model_buf);
 500
 501 #ifdef WORDS_NEED_ALIGNMENT
 502         align_polygon_model_data(pm);
 503 #endif
 504 #ifdef WORDS_BIGENDIAN
 505         swap_polygon_model_data(pm->model_data);
 506 #endif
 507         //verify(pm->model_data);
 508
 509         return pm;
 510 }
 511
 512 //reads the gun information for a model
 513 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 514 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 515 {
 516         CFILE *ifile;
 517         short version;
 518         int id,len;
 519         int n_guns=0;
 520         ubyte   *model_buf;
 521
 522         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 523         if (!model_buf)
 524                 Error("Can't allocate space to read model %s\n", filename);
 525
 526         if ((ifile=cfopen(filename,"rb"))==NULL)
 527                 Error("Can't open file <%s>",filename);
 528
 529         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 530
 531         Pof_addr = 0;
 532         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 533         cfclose(ifile);
 534
 535         id = pof_read_int(model_buf);
 536
 537         if (id!=0x4f505350) /* 'OPSP' */
 538                 Error("Bad ID in model file <%s>",filename);
 539
 540         version = pof_read_short(model_buf);
 541
 542         Assert(version >= 7);           //must be 7 or higher for this data
 543
 544         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 545                 Error("Bad version (%d) in model file <%s>",version,filename);
 546
 547         while (new_pof_read_int(id,model_buf) == 1) {
 548                 id = INTEL_INT(id);
 549                 //id  = pof_read_int(model_buf);
 550                 len = pof_read_int(model_buf);
 551
 552                 if (id == ID_GUNS) {            //List of guns on this object
 553
 554                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 555
 556                         int i;
 557
 558                         n_guns = pof_read_int(model_buf);
 559
 560                         for (i=0;i<n_guns;i++) {
 561                                 int id,sm;
 562
 563                                 id = pof_read_short(model_buf);
 564                                 sm = pof_read_short(model_buf);
 565                                 if (gun_submodels)
 566                                         gun_submodels[id] = sm;
 567                                 else if (sm!=0)
 568                                         Error("Invalid gun submodel in file <%s>",filename);
 569                                 pof_read_vecs(&gun_points[id],1,model_buf);
 570
 571                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 572                         }
 573
 574                 }
 575                 else
 576                         pof_cfseek(model_buf,len,SEEK_CUR);
 577
 578         }
 579
 580         d_free(model_buf);
 581
 582         return n_guns;
 583 }
 584
 585 //free up a model, getting rid of all its memory
 586 void free_model(polymodel *po)
 587 {
 588         d_free(po->model_data);
 589 }
 590
 591 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 592 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 593
 594 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 595
 596
 597 //draw a polygon model
 598
 599 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[])
 600 {
 601         polymodel *po;
 602         int i;
 603
 604         Assert(model_num < N_polygon_models);
 605
 606         po=&Polygon_models[model_num];
 607
 608         //check if should use simple model
 609         if (po->simpler_model )                                 //must have a simpler model
 610                 if (flags==0)                                                   //can't switch if this is debris
 611                         //!!if (!alt_textures) {                                //alternate textures might not match
 612                         //alt textures might not match, but in the one case we're using this
 613                         //for on 11/14/94, they do match.  So we leave it in.
 614                         {
 615                                 int cnt=1;
 616                                 fix depth;
 617
 618                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 619
 620                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 621                                         po = &Polygon_models[po->simpler_model-1];
 622                         }
 623
 624         if (alt_textures)
 625    {
 626                 for (i=0;i<po->n_textures;i++)  {
 627                         texture_list_index[i] = alt_textures[i];
 628                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 629                 }
 630    }
 631         else
 632    {
 633                 for (i=0;i<po->n_textures;i++)  {
 634                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 635                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 636                 }
 637    }
 638
 639 #ifdef PIGGY_USE_PAGING
 640         // Make sure the textures for this object are paged in...
 641         piggy_page_flushed = 0;
 642         for (i=0;i<po->n_textures;i++)
 643                 PIGGY_PAGE_IN( texture_list_index[i] );
 644         // Hmmm... cache got flushed in the middle of paging all these in,
 645         // so we need to reread them all in.
 646         if (piggy_page_flushed) {
 647                 piggy_page_flushed = 0;
 648                 for (i=0;i<po->n_textures;i++)
 649                         PIGGY_PAGE_IN( texture_list_index[i] );
 650         }
 651         // Make sure that they can all fit in memory.
 652         Assert( piggy_page_flushed == 0 );
 653 #endif
 654
 655         g3_start_instance_matrix(pos,orient);
 656
 657         g3_set_interp_points(robot_points);
 658
 659         if (flags == 0)         //draw entire object
 660
 661                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 662
 663         else {
 664                 int i;
 665
 666                 for (i=0;flags;flags>>=1,i++)
 667                         if (flags & 1) {
 668                                 vms_vector ofs;
 669
 670                                 Assert(i < po->n_models);
 671
 672                                 //if submodel, rotate around its center point, not pivot point
 673
 674                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 675                                 vm_vec_negate(&ofs);
 676                                 g3_start_instance_matrix(&ofs,NULL);
 677
 678                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 679
 680                                 g3_done_instance();
 681                         }
 682         }
 683
 684         g3_done_instance();
 685 }
 686
 687 void free_polygon_models()
 688 {
 689         int i;
 690
 691         for (i=0;i<N_polygon_models;i++) {
 692                 free_model(&Polygon_models[i]);
 693         }
 694
 695 }
 696
 697 void polyobj_find_min_max(polymodel *pm)
 698 {
 699         ushort nverts;
 700         vms_vector *vp;
 701         ushort *data,type;
 702         int m;
 703         vms_vector *big_mn,*big_mx;
 704
 705         big_mn = &pm->mins;
 706         big_mx = &pm->maxs;
 707
 708         for (m=0;m<pm->n_models;m++) {
 709                 vms_vector *mn,*mx,*ofs;
 710
 711                 mn = &pm->submodel_mins[m];
 712                 mx = &pm->submodel_maxs[m];
 713                 ofs= &pm->submodel_offsets[m];
 714
 715                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 716
 717                 type = *data++;
 718
 719                 Assert(type == 7 || type == 1);
 720
 721                 nverts = *data++;
 722
 723                 if (type==7)
 724                         data+=2;                //skip start & pad
 725
 726                 vp = (vms_vector *) data;
 727
 728                 *mn = *mx = *vp++; nverts--;
 729
 730                 if (m==0)
 731                         *big_mn = *big_mx = *mn;
 732
 733                 while (nverts--) {
 734                         if (vp->x > mx->x) mx->x = vp->x;
 735                         if (vp->y > mx->y) mx->y = vp->y;
 736                         if (vp->z > mx->z) mx->z = vp->z;
 737
 738                         if (vp->x < mn->x) mn->x = vp->x;
 739                         if (vp->y < mn->y) mn->y = vp->y;
 740                         if (vp->z < mn->z) mn->z = vp->z;
 741
 742                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 743                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 744                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 745
 746                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 747                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 748                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 749
 750                         vp++;
 751                 }
 752
 753 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 754         }
 755
 756 //      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);
 757
 758 }
 759
 760 extern short highest_texture_num;       //from the 3d
 761
 762 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 763
 764 //returns the number of this model
 765 #ifndef DRIVE
 766 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 767 #else
 768 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 769 #endif
 770 {
 771         #ifdef DRIVE
 772         #define r NULL
 773         #endif
 774
 775         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 776         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 777
 778         //      MK was real tired of those useless, slow mprintfs...
 779         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 780                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 781
 782         Assert(strlen(filename) <= 12);
 783         strcpy(Pof_names[N_polygon_models],filename);
 784
 785         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 786
 787         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 788
 789         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 790
 791         if (highest_texture_num+1 != n_textures)
 792                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 793
 794         Polygon_models[N_polygon_models].n_textures = n_textures;
 795         Polygon_models[N_polygon_models].first_texture = first_texture;
 796         Polygon_models[N_polygon_models].simpler_model = 0;
 797
 798 //      Assert(polygon_models[N_polygon_models]!=NULL);
 799
 800         N_polygon_models++;
 801
 802         return N_polygon_models-1;
 803
 804 }
 805
 806
 807 void init_polygon_models()
 808 {
 809         N_polygon_models = 0;
 810
 811         atexit((void (*)())free_polygon_models);
 812
 813 }
 814
 815 //compare against this size when figuring how far to place eye for picture
 816 #define BASE_MODEL_SIZE 0x28000
 817
 818 #define DEFAULT_VIEW_DIST 0x60000
 819
 820 //draws the given model in the current canvas.  The distance is set to
 821 //more-or-less fill the canvas.  Note that this routine actually renders
 822 //into an off-screen canvas that it creates, then copies to the current
 823 //canvas.
 824 void draw_model_picture(int mn,vms_angvec *orient_angles)
 825 {
 826         vms_vector      temp_pos=ZERO_VECTOR;
 827         vms_matrix      temp_orient = IDENTITY_MATRIX;
 828 #ifndef OGL
 829         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 830 #endif
 831
 832         Assert(mn>=0 && mn<N_polygon_models);
 833
 834 #ifdef OGL
 835         ogl_start_offscreen_render(0, 0, grd_curcanv->cv_bitmap.bm_w, grd_curcanv->cv_bitmap.bm_h);
 836 #else
 837         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 838         gr_set_current_canvas(temp_canv);
 839 #endif
 840         gr_clear_canvas( BM_XRGB(0,0,0) );
 841
 842         g3_start_frame();
 843         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 844
 845         if (Polygon_models[mn].rad != 0)
 846                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 847         else
 848                 temp_pos.z = DEFAULT_VIEW_DIST;
 849
 850         vm_angles_2_matrix(&temp_orient, orient_angles);
 851
 852         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 853
 854         g3_end_frame();
 855
 856 #ifdef OGL
 857         ogl_end_offscreen_render();
 858 #else
 859         gr_set_current_canvas(save_canv);
 860
 861         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 862
 863         gr_free_canvas(temp_canv);
 864 #endif
 865 }
 866
 867 #ifndef FAST_FILE_IO
 868 /*
 869  * reads a polymodel structure from a CFILE
 870  */
 871 extern void polymodel_read(polymodel *pm, CFILE *fp)
 872 {
 873         int i;
 874
 875         pm->n_models = cfile_read_int(fp);
 876         pm->model_data_size = cfile_read_int(fp);
 877         pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 878         for (i = 0; i < MAX_SUBMODELS; i++)
 879                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 880         for (i = 0; i < MAX_SUBMODELS; i++)
 881                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 882         for (i = 0; i < MAX_SUBMODELS; i++)
 883                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 884         for (i = 0; i < MAX_SUBMODELS; i++)
 885                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 886         for (i = 0; i < MAX_SUBMODELS; i++)
 887                 pm->submodel_rads[i] = cfile_read_fix(fp);
 888         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 889         for (i = 0; i < MAX_SUBMODELS; i++)
 890                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 891         for (i = 0; i < MAX_SUBMODELS; i++)
 892                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 893         cfile_read_vector(&(pm->mins), fp);
 894         cfile_read_vector(&(pm->maxs), fp);
 895         pm->rad = cfile_read_fix(fp);
 896         pm->n_textures = cfile_read_byte(fp);
 897         pm->first_texture = cfile_read_short(fp);
 898         pm->simpler_model = cfile_read_byte(fp);
 899 }
 900
 901 /*
 902  * reads n polymodel structs from a CFILE
 903  */
 904 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 905 {
 906         int i, j;
 907
 908         for (i = 0; i < n; i++) {
 909                 pm[i].n_models = cfile_read_int(fp);
 910                 pm[i].model_data_size = cfile_read_int(fp);
 911                 pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 912                 for (j = 0; j < MAX_SUBMODELS; j++)
 913                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 914                 for (j = 0; j < MAX_SUBMODELS; j++)
 915                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 916                 for (j = 0; j < MAX_SUBMODELS; j++)
 917                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 918                 for (j = 0; j < MAX_SUBMODELS; j++)
 919                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 920                 for (j = 0; j < MAX_SUBMODELS; j++)
 921                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 922                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 923                 for (j = 0; j < MAX_SUBMODELS; j++)
 924                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 925                 for (j = 0; j < MAX_SUBMODELS; j++)
 926                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 927                 cfile_read_vector(&(pm[i].mins), fp);
 928                 cfile_read_vector(&(pm[i].maxs), fp);
 929                 pm[i].rad = cfile_read_fix(fp);
 930                 pm[i].n_textures = cfile_read_byte(fp);
 931                 pm[i].first_texture = cfile_read_short(fp);
 932                 pm[i].simpler_model = cfile_read_byte(fp);
 933         }
 934         return i;
 935 }
 936 #endif
 937
 938
 939 /*
 940  * routine which allocates, reads, and inits a polymodel's model_data
 941  */
 942 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 943 {
 944         pm->model_data = d_malloc(pm->model_data_size);
 945         Assert(pm->model_data != NULL);
 946         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 947 #ifdef WORDS_NEED_ALIGNMENT
 948         align_polygon_model_data(pm);
 949 #endif
 950 #ifdef WORDS_BIGENDIAN
 951         swap_polygon_model_data(pm->model_data);
 952 #endif
 953         //verify(pm->model_data);
 954         g3_init_polygon_model(pm->model_data);
 955 }