main/polyobj.c

   1 /* $Id: polyobj.c,v 1.16 2003-10-10 09:36:35 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 /*
  16  *
  17  * Hacked-in polygon objects
  18  *
  19  * Old Log:
  20  * Revision 1.3  1995/10/25  14:07:07  allender
  21  * removed load_poly_model function
  22  *
  23  * Revision 1.2  1995/09/14  14:10:20  allender
  24  * two funtions should be void
  25  *
  26  * Revision 1.1  1995/05/16  15:30:08  allender
  27  * Initial revision
  28  *
  29  * Revision 2.1  1995/05/26  16:10:37  john
  30  * Support for new 4-byte align v8 pof files.
  31  *
  32  * Revision 2.0  1995/02/27  11:32:44  john
  33  * New version 2.0, which has no anonymous unions, builds with
  34  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  35  *
  36  * Revision 1.64  1995/01/14  19:16:43  john
  37  * First version of new bitmap paging code.
  38  *
  39  * Revision 1.63  1994/12/14  18:06:54  matt
  40  * Removed compile warnings
  41  *
  42  * Revision 1.62  1994/12/09  17:54:31  john
  43  * Made the CFILE's close right after reading in data.
  44  *
  45  * Revision 1.61  1994/12/09  16:13:28  mike
  46  * speedup pof file reading, but still horribly slow using hog file...problem somewhere else.
  47  *
  48  * Revision 1.60  1994/12/08  17:41:20  yuan
  49  * Cfiling stuff.
  50  *
  51  * Revision 1.59  1994/11/21  11:02:19  matt
  52  * Added error checking
  53  *
  54  * Revision 1.58  1994/11/14  11:32:49  matt
  55  * Allow switching to simpler models even when alt_textures specified
  56  *
  57  * Revision 1.57  1994/11/13  21:15:24  matt
  58  * Added basic support for more than one level of detail simplification
  59  *
  60  * Revision 1.56  1994/11/11  19:29:25  matt
  61  * Added code to show low detail polygon models
  62  *
  63  * Revision 1.55  1994/11/10  14:02:57  matt
  64  * Hacked in support for player ships with different textures
  65  *
  66  * Revision 1.54  1994/11/03  11:01:59  matt
  67  * Made robot pics lighted
  68  *
  69  * Revision 1.53  1994/11/02  16:18:34  matt
  70  * Moved draw_model_picture() out of editor
  71  *
  72  * Revision 1.52  1994/10/18  14:38:11  matt
  73  * Restored assert now that bug is fixed
  74  *
  75  * Revision 1.51  1994/10/17  21:35:03  matt
  76  * Added support for new Control Center/Main Reactor
  77  *
  78  * Revision 1.50  1994/10/14  17:46:23  yuan
  79  * Made the soft Int3 only work in net mode.
  80  *
  81  * Revision 1.49  1994/10/14  17:43:47  yuan
  82  * Added soft int3's instead of Asserts  for some common network bugs.
  83  *
  84  * Revision 1.48  1994/10/14  17:09:04  yuan
  85  * Made Assert on line 610 be if in an attempt
  86  * to bypass.
  87  *
  88  * Revision 1.47  1994/09/09  14:23:42  matt
  89  * Added glow code to polygon models for engine glow
  90  *
  91  * Revision 1.46  1994/08/26  18:03:30  matt
  92  * Added code to remap polygon model numbers by matching filenames
  93  *
  94  * Revision 1.45  1994/08/26  15:35:58  matt
  95  * Made eclips usable on more than one object at a time
  96  *
  97  * Revision 1.44  1994/08/25  18:11:58  matt
  98  * Made player's weapons and flares fire from the positions on the 3d model.
  99  * Also added support for quad lasers.
 100  *
 101  * Revision 1.43  1994/07/25  00:14:18  matt
 102  * Made a couple of minor changes for the drivethrough
 103  *
 104  * Revision 1.42  1994/07/25  00:02:41  matt
 105  * Various changes to accomodate new 3d, which no longer takes point numbers
 106  * as parms, and now only takes pointers to points.
 107  *
 108  */
 109
 110
 111 #ifdef HAVE_CONFIG_H
 112 #include <conf.h>
 113 #endif
 114
 115 #ifdef RCS
 116 static char rcsid[] = "$Id: polyobj.c,v 1.16 2003-10-10 09:36:35 btb Exp $";
 117 #endif
 118
 119 #include <stdio.h>
 120 #include <stdlib.h>
 121 #include <string.h>
 122
 123 // -- I hate this warning in make depend! -- #ifdef DRIVE
 124 // -- I hate this warning in make depend! -- #include "drive.h"
 125 // -- I hate this warning in make depend! -- #else
 126 #include "inferno.h"
 127 // -- I hate this warning in make depend! -- #endif
 128
 129 #include "polyobj.h"
 130
 131 #include "vecmat.h"
 132 #include "interp.h"
 133 #include "error.h"
 134 #include "mono.h"
 135 #include "u_mem.h"
 136 #include "args.h"
 137 #include "byteswap.h"
 138
 139 #ifndef DRIVE
 140 #include "texmap.h"
 141 #include "bm.h"
 142 #include "textures.h"
 143 #include "object.h"
 144 #include "lighting.h"
 145 #include "cfile.h"
 146 #include "piggy.h"
 147 #endif
 148
 149 #include "pa_enabl.h"
 150
 151 #ifdef _3DFX
 152 #include "3dfx_des.h"
 153 #endif
 154
 155 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
 156
 157 int N_polygon_models = 0;
 158
 159 #define MAX_POLYGON_VECS 1000
 160 g3s_point robot_points[MAX_POLYGON_VECS];
 161
 162 #define PM_COMPATIBLE_VERSION 6
 163 #define PM_OBJFILE_VERSION 8
 164
 165 int     Pof_file_end;
 166 int     Pof_addr;
 167
 168 #define MODEL_BUF_SIZE  32768
 169
 170 void _pof_cfseek(int len,int type)
 171 {
 172         switch (type) {
 173                 case SEEK_SET:  Pof_addr = len; break;
 174                 case SEEK_CUR:  Pof_addr += len;        break;
 175                 case SEEK_END:
 176                         Assert(len <= 0);       //      seeking from end, better be moving back.
 177                         Pof_addr = Pof_file_end + len;
 178                         break;
 179         }
 180
 181         if (Pof_addr > MODEL_BUF_SIZE)
 182                 Int3();
 183 }
 184
 185 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
 186
 187 int pof_read_int(ubyte *bufp)
 188 {
 189         int i;
 190
 191         i = *((int *) &bufp[Pof_addr]);
 192         Pof_addr += 4;
 193         return INTEL_INT(i);
 194
 195 //      if (cfread(&i,sizeof(i),1,f) != 1)
 196 //              Error("Unexpected end-of-file while reading object");
 197 //
 198 //      return i;
 199 }
 200
 201 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 202 {
 203         if (Pof_addr + nelem*elsize > Pof_file_end)
 204                 return 0;
 205
 206         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 207
 208         Pof_addr += elsize*nelem;
 209
 210         if (Pof_addr > MODEL_BUF_SIZE)
 211                 Int3();
 212
 213         return nelem;
 214 }
 215
 216 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 217 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 218
 219 short pof_read_short(ubyte *bufp)
 220 {
 221         short s;
 222
 223         s = *((short *) &bufp[Pof_addr]);
 224         Pof_addr += 2;
 225         return INTEL_SHORT(s);
 226 //      if (cfread(&s,sizeof(s),1,f) != 1)
 227 //              Error("Unexpected end-of-file while reading object");
 228 //
 229 //      return s;
 230 }
 231
 232 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 233 {
 234         int     i;
 235
 236         for (i=0; i<max_char; i++) {
 237                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 238                         break;
 239         }
 240
 241 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 242
 243 }
 244
 245 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 246 {
 247 //      cfread(vecs,sizeof(vms_vector),n,f);
 248
 249         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 250         Pof_addr += n*sizeof(*vecs);
 251
 252 #ifdef WORDS_BIGENDIAN
 253         while (n > 0)
 254                 vms_vector_swap(&vecs[--n]);
 255 #endif
 256
 257         if (Pof_addr > MODEL_BUF_SIZE)
 258                 Int3();
 259 }
 260
 261 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 262 {
 263         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 264         Pof_addr += n*sizeof(*angs);
 265
 266 #ifdef WORDS_BIGENDIAN
 267         while (n > 0)
 268                 vms_angvec_swap(&angs[--n]);
 269 #endif
 270
 271         if (Pof_addr > MODEL_BUF_SIZE)
 272                 Int3();
 273 }
 274
 275 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 276 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 277 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 278 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 279 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 280 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 281
 282 #ifdef DRIVE
 283 #define robot_info void
 284 #else
 285 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 286
 287 //set the animation angles for this robot.  Gun fields of robot info must
 288 //be filled in.
 289 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 290 #endif
 291
 292 #define DEBUG_LEVEL CON_NORMAL
 293
 294 #ifdef WORDS_NEED_ALIGNMENT
 295 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 296 {
 297         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 298 }
 299 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 300 {
 301         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 302 }
 303 /*
 304  * find chunk with smallest address
 305  */
 306 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 307 {
 308         int i, first_index = 0;
 309         Assert(no_chunks >= 1);
 310         for (i = 1; i < no_chunks; i++)
 311                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 312                         first_index = i;
 313         return first_index;
 314 }
 315 #define SHIFT_SPACE 500 // increase if insufficent
 316
 317 void align_polygon_model_data(polymodel *pm)
 318 {
 319         int i, chunk_len;
 320         int total_correction = 0;
 321         ubyte *cur_old, *cur_new;
 322         chunk cur_ch;
 323         chunk ch_list[MAX_CHUNKS];
 324         int no_chunks = 0;
 325         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 326         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 327
 328         Assert(tmp != NULL);
 329         //start with first chunk (is always aligned!)
 330         cur_old = pm->model_data;
 331         cur_new = tmp;
 332         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 333         memcpy(cur_new, cur_old, chunk_len);
 334         while (no_chunks > 0) {
 335                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 336                 cur_ch = ch_list[first_index];
 337                 // remove first chunk from array:
 338                 no_chunks--;
 339                 for (i = first_index; i < no_chunks; i++)
 340                         ch_list[i] = ch_list[i + 1];
 341                 // if (new) address unaligned:
 342                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 343                         // calculate how much to move to be aligned
 344                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 345                         // correct chunks' addresses
 346                         cur_ch.correction += to_shift;
 347                         for (i = 0; i < no_chunks; i++)
 348                                 ch_list[i].correction += to_shift;
 349                         total_correction += to_shift;
 350                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 351                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 352                 }
 353                 //write (corrected) chunk for current chunk:
 354                 *((short *)(cur_ch.new_base + cur_ch.offset))
 355                   = INTEL_SHORT(cur_ch.correction
 356                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 357                 //write (correctly aligned) chunk:
 358                 cur_old = old_dest(cur_ch);
 359                 cur_new = new_dest(cur_ch);
 360                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 361                 memcpy(cur_new, cur_old, chunk_len);
 362                 //correct submodel_ptr's for pm, too
 363                 for (i = 0; i < MAX_SUBMODELS; i++)
 364                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 365                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 366                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 367         }
 368         d_free(pm->model_data);
 369         pm->model_data_size += total_correction;
 370         pm->model_data = d_malloc(pm->model_data_size);
 371         Assert(pm->model_data != NULL);
 372         memcpy(pm->model_data, tmp, pm->model_data_size);
 373         d_free(tmp);
 374 }
 375 #endif //def WORDS_NEED_ALIGNMENT
 376
 377 //reads a binary file containing a 3d model
 378 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 379 {
 380         CFILE *ifile;
 381         short version;
 382         int id,len, next_chunk;
 383         int anim_flag = 0;
 384         ubyte *model_buf;
 385
 386         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 387         if (!model_buf)
 388                 Error("Can't allocate space to read model %s\n", filename);
 389
 390         if ((ifile=cfopen(filename,"rb"))==NULL)
 391                 Error("Can't open file <%s>",filename);
 392
 393         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 394
 395         Pof_addr = 0;
 396         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 397         cfclose(ifile);
 398
 399         id = pof_read_int(model_buf);
 400
 401         if (id!=0x4f505350) /* 'OPSP' */
 402                 Error("Bad ID in model file <%s>",filename);
 403
 404         version = pof_read_short(model_buf);
 405
 406         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 407                 Error("Bad version (%d) in model file <%s>",version,filename);
 408
 409         if ( FindArg( "-bspgen" ))
 410                 printf( "bspgen -c1" );
 411
 412         while (new_pof_read_int(id,model_buf) == 1) {
 413                 id = INTEL_INT(id);
 414                 //id  = pof_read_int(model_buf);
 415                 len = pof_read_int(model_buf);
 416                 next_chunk = Pof_addr + len;
 417
 418                 switch (id) {
 419
 420                         case ID_OHDR: {         //Object header
 421                                 vms_vector pmmin,pmmax;
 422
 423                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 424
 425                                 pm->n_models = pof_read_int(model_buf);
 426                                 pm->rad = pof_read_int(model_buf);
 427
 428                                 Assert(pm->n_models <= MAX_SUBMODELS);
 429
 430                                 pof_read_vecs(&pmmin,1,model_buf);
 431                                 pof_read_vecs(&pmmax,1,model_buf);
 432
 433                                 if ( FindArg( "-bspgen" ))      {
 434                                         vms_vector v;
 435                                         fix l;
 436
 437                                         vm_vec_sub(&v, &pmmax, &pmmin );
 438                                         l = v.x;
 439                                         if ( v.y > l ) l = v.y;
 440                                         if ( v.z > l ) l = v.z;
 441
 442                                         printf( " -l%.3f", f2fl(l) );
 443                                 }
 444
 445                                 break;
 446                         }
 447
 448                         case ID_SOBJ: {         //Subobject header
 449                                 int n;
 450
 451                                 anim_flag++;
 452
 453                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 454
 455                                 n = pof_read_short(model_buf);
 456
 457                                 Assert(n < MAX_SUBMODELS);
 458
 459                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 460
 461                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 462                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 463                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 464
 465                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 466
 467                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 468
 469                                 break;
 470
 471                         }
 472
 473                         #ifndef DRIVE
 474                         case ID_GUNS: {         //List of guns on this object
 475
 476                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 477
 478                                 if (r) {
 479                                         int i;
 480                                         vms_vector gun_dir;
 481                                         ubyte gun_used[MAX_GUNS];
 482
 483                                         r->n_guns = pof_read_int(model_buf);
 484
 485                                         if ( r->n_guns )
 486                                                 anim_flag++;
 487
 488                                         Assert(r->n_guns <= MAX_GUNS);
 489
 490                                         for (i=0;i<r->n_guns;i++)
 491                                                 gun_used[i] = 0;
 492
 493                                         for (i=0;i<r->n_guns;i++) {
 494                                                 int id;
 495
 496                                                 id = pof_read_short(model_buf);
 497                                                 Assert(id < r->n_guns);
 498                                                 Assert(gun_used[id] == 0);
 499                                                 gun_used[id] = 1;
 500                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 501                                                 Assert(r->gun_submodels[id] != 0xff);
 502                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 503
 504                                                 if (version >= 7)
 505                                                         pof_read_vecs(&gun_dir,1,model_buf);
 506                                         }
 507                                 }
 508                                 else
 509                                         pof_cfseek(model_buf,len,SEEK_CUR);
 510
 511                                 break;
 512                         }
 513
 514                         case ID_ANIM:           //Animation data
 515                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 516
 517                                 anim_flag++;
 518
 519                                 if (r) {
 520                                         int n_frames,f,m;
 521
 522                                         n_frames = pof_read_short(model_buf);
 523
 524                                         Assert(n_frames == N_ANIM_STATES);
 525
 526                                         for (m=0;m<pm->n_models;m++)
 527                                                 for (f=0;f<n_frames;f++)
 528                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 529
 530
 531                                         robot_set_angles(r,pm,anim_angs);
 532
 533                                 }
 534                                 else
 535                                         pof_cfseek(model_buf,len,SEEK_CUR);
 536
 537                                 break;
 538                         #endif
 539
 540                         case ID_TXTR: {         //Texture filename list
 541                                 int n;
 542                                 char name_buf[128];
 543
 544                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 545
 546                                 n = pof_read_short(model_buf);
 547                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 548                                 while (n--) {
 549                                         pof_read_string(name_buf,128,model_buf);
 550                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 551                                 }
 552
 553                                 break;
 554                         }
 555
 556                         case ID_IDTA:           //Interpreter data
 557                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 558
 559                                 pm->model_data = d_malloc(len);
 560                                 pm->model_data_size = len;
 561
 562                                 pof_cfread(pm->model_data,1,len,model_buf);
 563
 564                                 break;
 565
 566                         default:
 567                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 568                                 pof_cfseek(model_buf,len,SEEK_CUR);
 569                                 break;
 570
 571                 }
 572                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 573                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 574         }
 575
 576 //      for (i=0;i<pm->n_models;i++)
 577 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 578
 579         if ( FindArg( "-bspgen" )) {
 580                 char *p = strchr( filename, '.' );
 581                 *p = 0;
 582
 583                 if ( anim_flag > 1 )
 584                         printf( " -a" );
 585
 586                 printf( " %s.3ds\n", filename );
 587                 *p = '.';
 588         }
 589
 590         d_free(model_buf);
 591
 592 #ifdef WORDS_NEED_ALIGNMENT
 593         align_polygon_model_data(pm);
 594 #endif
 595 #ifdef WORDS_BIGENDIAN
 596         swap_polygon_model_data(pm->model_data);
 597 #endif
 598         //verify(pm->model_data);
 599
 600         return pm;
 601 }
 602
 603 //reads the gun information for a model
 604 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 605 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 606 {
 607         CFILE *ifile;
 608         short version;
 609         int id,len;
 610         int n_guns=0;
 611         ubyte   *model_buf;
 612
 613         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 614         if (!model_buf)
 615                 Error("Can't allocate space to read model %s\n", filename);
 616
 617         if ((ifile=cfopen(filename,"rb"))==NULL)
 618                 Error("Can't open file <%s>",filename);
 619
 620         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 621
 622         Pof_addr = 0;
 623         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 624         cfclose(ifile);
 625
 626         id = pof_read_int(model_buf);
 627
 628         if (id!=0x4f505350) /* 'OPSP' */
 629                 Error("Bad ID in model file <%s>",filename);
 630
 631         version = pof_read_short(model_buf);
 632
 633         Assert(version >= 7);           //must be 7 or higher for this data
 634
 635         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 636                 Error("Bad version (%d) in model file <%s>",version,filename);
 637
 638         while (new_pof_read_int(id,model_buf) == 1) {
 639                 id = INTEL_INT(id);
 640                 //id  = pof_read_int(model_buf);
 641                 len = pof_read_int(model_buf);
 642
 643                 if (id == ID_GUNS) {            //List of guns on this object
 644
 645                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 646
 647                         int i;
 648
 649                         n_guns = pof_read_int(model_buf);
 650
 651                         for (i=0;i<n_guns;i++) {
 652                                 int id,sm;
 653
 654                                 id = pof_read_short(model_buf);
 655                                 sm = pof_read_short(model_buf);
 656                                 if (gun_submodels)
 657                                         gun_submodels[id] = sm;
 658                                 else if (sm!=0)
 659                                         Error("Invalid gun submodel in file <%s>",filename);
 660                                 pof_read_vecs(&gun_points[id],1,model_buf);
 661
 662                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 663                         }
 664
 665                 }
 666                 else
 667                         pof_cfseek(model_buf,len,SEEK_CUR);
 668
 669         }
 670
 671         d_free(model_buf);
 672
 673         return n_guns;
 674 }
 675
 676 //free up a model, getting rid of all its memory
 677 void free_model(polymodel *po)
 678 {
 679         d_free(po->model_data);
 680 }
 681
 682 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 683 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 684
 685 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 686
 687
 688 //draw a polygon model
 689
 690 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[])
 691 {
 692         polymodel *po;
 693         int i;
 694         PA_DFX (int save_light);
 695
 696         Assert(model_num < N_polygon_models);
 697
 698         po=&Polygon_models[model_num];
 699
 700         //check if should use simple model
 701         if (po->simpler_model )                                 //must have a simpler model
 702                 if (flags==0)                                                   //can't switch if this is debris
 703                         //!!if (!alt_textures) {                                //alternate textures might not match
 704                         //alt textures might not match, but in the one case we're using this
 705                         //for on 11/14/94, they do match.  So we leave it in.
 706                         {
 707                                 int cnt=1;
 708                                 fix depth;
 709
 710                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 711
 712                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 713                                         po = &Polygon_models[po->simpler_model-1];
 714                         }
 715
 716         if (alt_textures)
 717    {
 718                 for (i=0;i<po->n_textures;i++)  {
 719                         texture_list_index[i] = alt_textures[i];
 720                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 721
 722          #ifdef _3DFX
 723          texture_list[i]->bm_handle = texture_list_index[i].index;
 724          #endif
 725                 }
 726    }
 727         else
 728    {
 729                 for (i=0;i<po->n_textures;i++)  {
 730                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 731                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 732
 733          #ifdef _3DFX
 734          texture_list[i]->bm_handle = texture_list_index[i].index;
 735          #endif
 736                 }
 737    }
 738
 739 #ifdef PIGGY_USE_PAGING
 740         // Make sure the textures for this object are paged in...
 741         piggy_page_flushed = 0;
 742         for (i=0;i<po->n_textures;i++)
 743                 PIGGY_PAGE_IN( texture_list_index[i] );
 744         // Hmmm... cache got flushed in the middle of paging all these in,
 745         // so we need to reread them all in.
 746         if (piggy_page_flushed) {
 747                 piggy_page_flushed = 0;
 748                 for (i=0;i<po->n_textures;i++)
 749                         PIGGY_PAGE_IN( texture_list_index[i] );
 750         }
 751         // Make sure that they can all fit in memory.
 752         Assert( piggy_page_flushed == 0 );
 753 #endif
 754
 755         g3_start_instance_matrix(pos,orient);
 756
 757         g3_set_interp_points(robot_points);
 758
 759 #ifdef _3DFX
 760    _3dfx_rendering_poly_obj = 1;
 761 #endif
 762         PA_DFX(save_light = Lighting_on);
 763         PA_DFX(Lighting_on = 0);
 764
 765         if (flags == 0)         //draw entire object
 766
 767                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 768
 769         else {
 770                 int i;
 771
 772                 for (i=0;flags;flags>>=1,i++)
 773                         if (flags & 1) {
 774                                 vms_vector ofs;
 775
 776                                 Assert(i < po->n_models);
 777
 778                                 //if submodel, rotate around its center point, not pivot point
 779
 780                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 781                                 vm_vec_negate(&ofs);
 782                                 g3_start_instance_matrix(&ofs,NULL);
 783
 784                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 785
 786                                 g3_done_instance();
 787                         }
 788         }
 789
 790         g3_done_instance();
 791
 792 #ifdef _3DFX
 793    _3dfx_rendering_poly_obj = 0;
 794 #endif
 795
 796         PA_DFX (Lighting_on = save_light);
 797
 798
 799 }
 800
 801 void free_polygon_models()
 802 {
 803         int i;
 804
 805         for (i=0;i<N_polygon_models;i++) {
 806                 free_model(&Polygon_models[i]);
 807         }
 808
 809 }
 810
 811 void polyobj_find_min_max(polymodel *pm)
 812 {
 813         ushort nverts;
 814         vms_vector *vp;
 815         ushort *data,type;
 816         int m;
 817         vms_vector *big_mn,*big_mx;
 818
 819         big_mn = &pm->mins;
 820         big_mx = &pm->maxs;
 821
 822         for (m=0;m<pm->n_models;m++) {
 823                 vms_vector *mn,*mx,*ofs;
 824
 825                 mn = &pm->submodel_mins[m];
 826                 mx = &pm->submodel_maxs[m];
 827                 ofs= &pm->submodel_offsets[m];
 828
 829                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 830
 831                 type = *data++;
 832
 833                 Assert(type == 7 || type == 1);
 834
 835                 nverts = *data++;
 836
 837                 if (type==7)
 838                         data+=2;                //skip start & pad
 839
 840                 vp = (vms_vector *) data;
 841
 842                 *mn = *mx = *vp++; nverts--;
 843
 844                 if (m==0)
 845                         *big_mn = *big_mx = *mn;
 846
 847                 while (nverts--) {
 848                         if (vp->x > mx->x) mx->x = vp->x;
 849                         if (vp->y > mx->y) mx->y = vp->y;
 850                         if (vp->z > mx->z) mx->z = vp->z;
 851
 852                         if (vp->x < mn->x) mn->x = vp->x;
 853                         if (vp->y < mn->y) mn->y = vp->y;
 854                         if (vp->z < mn->z) mn->z = vp->z;
 855
 856                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 857                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 858                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 859
 860                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 861                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 862                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 863
 864                         vp++;
 865                 }
 866
 867 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 868         }
 869
 870 //      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);
 871
 872 }
 873
 874 extern short highest_texture_num;       //from the 3d
 875
 876 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 877
 878 //returns the number of this model
 879 #ifndef DRIVE
 880 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 881 #else
 882 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 883 #endif
 884 {
 885         #ifdef DRIVE
 886         #define r NULL
 887         #endif
 888
 889         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 890         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 891
 892         //      MK was real tired of those useless, slow mprintfs...
 893         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 894                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 895
 896         Assert(strlen(filename) <= 12);
 897         strcpy(Pof_names[N_polygon_models],filename);
 898
 899         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 900
 901         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 902
 903         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 904
 905         if (highest_texture_num+1 != n_textures)
 906                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 907
 908         Polygon_models[N_polygon_models].n_textures = n_textures;
 909         Polygon_models[N_polygon_models].first_texture = first_texture;
 910         Polygon_models[N_polygon_models].simpler_model = 0;
 911
 912 //      Assert(polygon_models[N_polygon_models]!=NULL);
 913
 914         N_polygon_models++;
 915
 916         return N_polygon_models-1;
 917
 918 }
 919
 920
 921 void init_polygon_models()
 922 {
 923         N_polygon_models = 0;
 924
 925         atexit((void (*)())free_polygon_models);
 926
 927 }
 928
 929 //compare against this size when figuring how far to place eye for picture
 930 #define BASE_MODEL_SIZE 0x28000
 931
 932 #define DEFAULT_VIEW_DIST 0x60000
 933
 934 //draws the given model in the current canvas.  The distance is set to
 935 //more-or-less fill the canvas.  Note that this routine actually renders
 936 //into an off-screen canvas that it creates, then copies to the current
 937 //canvas.
 938 void draw_model_picture(int mn,vms_angvec *orient_angles)
 939 {
 940         vms_vector      temp_pos=ZERO_VECTOR;
 941         vms_matrix      temp_orient = IDENTITY_MATRIX;
 942         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 943
 944         Assert(mn>=0 && mn<N_polygon_models);
 945
 946         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 947         gr_set_current_canvas(temp_canv);
 948         gr_clear_canvas( BM_XRGB(0,0,0) );
 949
 950         g3_start_frame();
 951         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 952
 953         if (Polygon_models[mn].rad != 0)
 954                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 955         else
 956                 temp_pos.z = DEFAULT_VIEW_DIST;
 957
 958         vm_angles_2_matrix(&temp_orient, orient_angles);
 959
 960         PA_DFX(save_light = Lighting_on);
 961         PA_DFX(Lighting_on = 0);
 962         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 963         PA_DFX (Lighting_on = save_light);
 964
 965         gr_set_current_canvas(save_canv);
 966
 967         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 968
 969         gr_free_canvas(temp_canv);
 970 }
 971
 972 #ifndef FAST_FILE_IO
 973 /*
 974  * reads a polymodel structure from a CFILE
 975  */
 976 extern void polymodel_read(polymodel *pm, CFILE *fp)
 977 {
 978         int i;
 979
 980         pm->n_models = cfile_read_int(fp);
 981         pm->model_data_size = cfile_read_int(fp);
 982         pm->model_data = (ubyte *) cfile_read_int(fp);
 983         for (i = 0; i < MAX_SUBMODELS; i++)
 984                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 985         for (i = 0; i < MAX_SUBMODELS; i++)
 986                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 987         for (i = 0; i < MAX_SUBMODELS; i++)
 988                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 989         for (i = 0; i < MAX_SUBMODELS; i++)
 990                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 991         for (i = 0; i < MAX_SUBMODELS; i++)
 992                 pm->submodel_rads[i] = cfile_read_fix(fp);
 993         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 994         for (i = 0; i < MAX_SUBMODELS; i++)
 995                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 996         for (i = 0; i < MAX_SUBMODELS; i++)
 997                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 998         cfile_read_vector(&(pm->mins), fp);
 999         cfile_read_vector(&(pm->maxs), fp);
1000         pm->rad = cfile_read_fix(fp);
1001         pm->n_textures = cfile_read_byte(fp);
1002         pm->first_texture = cfile_read_short(fp);
1003         pm->simpler_model = cfile_read_byte(fp);
1004 }
1005
1006 /*
1007  * reads n polymodel structs from a CFILE
1008  */
1009 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
1010 {
1011         int i, j;
1012
1013         for (i = 0; i < n; i++) {
1014                 pm[i].n_models = cfile_read_int(fp);
1015                 pm[i].model_data_size = cfile_read_int(fp);
1016                 pm[i].model_data = (ubyte *) cfile_read_int(fp);
1017                 for (j = 0; j < MAX_SUBMODELS; j++)
1018                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
1019                 for (j = 0; j < MAX_SUBMODELS; j++)
1020                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
1021                 for (j = 0; j < MAX_SUBMODELS; j++)
1022                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
1023                 for (j = 0; j < MAX_SUBMODELS; j++)
1024                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
1025                 for (j = 0; j < MAX_SUBMODELS; j++)
1026                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
1027                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
1028                 for (j = 0; j < MAX_SUBMODELS; j++)
1029                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
1030                 for (j = 0; j < MAX_SUBMODELS; j++)
1031                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
1032                 cfile_read_vector(&(pm[i].mins), fp);
1033                 cfile_read_vector(&(pm[i].maxs), fp);
1034                 pm[i].rad = cfile_read_fix(fp);
1035                 pm[i].n_textures = cfile_read_byte(fp);
1036                 pm[i].first_texture = cfile_read_short(fp);
1037                 pm[i].simpler_model = cfile_read_byte(fp);
1038         }
1039         return i;
1040 }
1041 #endif
1042
1043
1044 /*
1045  * routine which allocates, reads, and inits a polymodel's model_data
1046  */
1047 void polygon_model_data_read(polymodel *pm, CFILE *fp)
1048 {
1049         pm->model_data = d_malloc(pm->model_data_size);
1050         Assert(pm->model_data != NULL);
1051         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
1052 #ifdef WORDS_NEED_ALIGNMENT
1053         align_polygon_model_data(pm);
1054 #endif
1055 #ifdef WORDS_BIGENDIAN
1056         swap_polygon_model_data(pm->model_data);
1057 #endif
1058         //verify(pm->model_data);
1059         g3_init_polygon_model(pm->model_data);
1060 }