main/polyobj.c

   1 /* $Id: polyobj.c,v 1.14 2003-03-29 22:35:00 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 1.14 2003-03-29 22:35:00 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 "interp.h"
  37 #include "error.h"
  38 #include "mono.h"
  39 #include "u_mem.h"
  40 #include "args.h"
  41 #include "byteswap.h"
  42
  43 #ifndef DRIVE
  44 #include "texmap.h"
  45 #include "bm.h"
  46 #include "textures.h"
  47 #include "object.h"
  48 #include "lighting.h"
  49 #include "cfile.h"
  50 #include "piggy.h"
  51 #endif
  52
  53 #include "pa_enabl.h"
  54
  55 #ifdef _3DFX
  56 #include "3dfx_des.h"
  57 #endif
  58
  59 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  60
  61 int N_polygon_models = 0;
  62
  63 #define MAX_POLYGON_VECS 1000
  64 g3s_point robot_points[MAX_POLYGON_VECS];
  65
  66 #define PM_COMPATIBLE_VERSION 6
  67 #define PM_OBJFILE_VERSION 8
  68
  69 int     Pof_file_end;
  70 int     Pof_addr;
  71
  72 #define MODEL_BUF_SIZE  32768
  73
  74 void _pof_cfseek(int len,int type)
  75 {
  76         switch (type) {
  77                 case SEEK_SET:  Pof_addr = len; break;
  78                 case SEEK_CUR:  Pof_addr += len;        break;
  79                 case SEEK_END:
  80                         Assert(len <= 0);       //      seeking from end, better be moving back.
  81                         Pof_addr = Pof_file_end + len;
  82                         break;
  83         }
  84
  85         if (Pof_addr > MODEL_BUF_SIZE)
  86                 Int3();
  87 }
  88
  89 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  90
  91 int pof_read_int(ubyte *bufp)
  92 {
  93         int i;
  94
  95         i = *((int *) &bufp[Pof_addr]);
  96         Pof_addr += 4;
  97         return INTEL_INT(i);
  98
  99 //      if (cfread(&i,sizeof(i),1,f) != 1)
 100 //              Error("Unexpected end-of-file while reading object");
 101 //
 102 //      return i;
 103 }
 104
 105 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 106 {
 107         if (Pof_addr + nelem*elsize > Pof_file_end)
 108                 return 0;
 109
 110         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 111
 112         Pof_addr += elsize*nelem;
 113
 114         if (Pof_addr > MODEL_BUF_SIZE)
 115                 Int3();
 116
 117         return nelem;
 118 }
 119
 120 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 121 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 122
 123 short pof_read_short(ubyte *bufp)
 124 {
 125         short s;
 126
 127         s = *((short *) &bufp[Pof_addr]);
 128         Pof_addr += 2;
 129         return INTEL_SHORT(s);
 130 //      if (cfread(&s,sizeof(s),1,f) != 1)
 131 //              Error("Unexpected end-of-file while reading object");
 132 //
 133 //      return s;
 134 }
 135
 136 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 137 {
 138         int     i;
 139
 140         for (i=0; i<max_char; i++) {
 141                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 142                         break;
 143         }
 144
 145 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 146
 147 }
 148
 149 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 150 {
 151 //      cfread(vecs,sizeof(vms_vector),n,f);
 152
 153         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 154         Pof_addr += n*sizeof(*vecs);
 155
 156 #ifdef WORDS_BIGENDIAN
 157         while (n > 0)
 158                 vms_vector_swap(&vecs[--n]);
 159 #endif
 160
 161         if (Pof_addr > MODEL_BUF_SIZE)
 162                 Int3();
 163 }
 164
 165 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 166 {
 167         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 168         Pof_addr += n*sizeof(*angs);
 169
 170 #ifdef WORDS_BIGENDIAN
 171         while (n > 0)
 172                 vms_angvec_swap(&angs[--n]);
 173 #endif
 174
 175         if (Pof_addr > MODEL_BUF_SIZE)
 176                 Int3();
 177 }
 178
 179 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 180 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 181 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 182 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 183 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 184 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 185
 186 #ifdef DRIVE
 187 #define robot_info void
 188 #else
 189 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 190
 191 //set the animation angles for this robot.  Gun fields of robot info must
 192 //be filled in.
 193 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 194 #endif
 195
 196 #define DEBUG_LEVEL CON_NORMAL
 197
 198 #ifdef WORDS_NEED_ALIGNMENT
 199 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 200 {
 201         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 202 }
 203 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 204 {
 205         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 206 }
 207 /*
 208  * find chunk with smallest address
 209  */
 210 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 211 {
 212         int i, first_index = 0;
 213         Assert(no_chunks >= 1);
 214         for (i = 1; i < no_chunks; i++)
 215                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 216                         first_index = i;
 217         return first_index;
 218 }
 219 #define SHIFT_SPACE 500 // increase if insufficent
 220
 221 void align_polygon_model_data(polymodel *pm)
 222 {
 223         int i, chunk_len;
 224         int total_correction = 0;
 225         ubyte *cur_old, *cur_new;
 226         chunk cur_ch;
 227         chunk ch_list[MAX_CHUNKS];
 228         int no_chunks = 0;
 229         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 230         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 231
 232         Assert(tmp != NULL);
 233         //start with first chunk (is always aligned!)
 234         cur_old = pm->model_data;
 235         cur_new = tmp;
 236         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 237         memcpy(cur_new, cur_old, chunk_len);
 238         while (no_chunks > 0) {
 239                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 240                 cur_ch = ch_list[first_index];
 241                 // remove first chunk from array:
 242                 no_chunks--;
 243                 for (i = first_index; i < no_chunks; i++)
 244                         ch_list[i] = ch_list[i + 1];
 245                 // if (new) address unaligned:
 246                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 247                         // calculate how much to move to be aligned
 248                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 249                         // correct chunks' addresses
 250                         cur_ch.correction += to_shift;
 251                         for (i = 0; i < no_chunks; i++)
 252                                 ch_list[i].correction += to_shift;
 253                         total_correction += to_shift;
 254                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 255                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 256                 }
 257                 //write (corrected) chunk for current chunk:
 258                 *((short *)(cur_ch.new_base + cur_ch.offset))
 259                   = INTEL_SHORT(cur_ch.correction
 260                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 261                 //write (correctly aligned) chunk:
 262                 cur_old = old_dest(cur_ch);
 263                 cur_new = new_dest(cur_ch);
 264                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 265                 memcpy(cur_new, cur_old, chunk_len);
 266                 //correct submodel_ptr's for pm, too
 267                 for (i = 0; i < MAX_SUBMODELS; i++)
 268                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 269                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 270                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 271         }
 272         d_free(pm->model_data);
 273         pm->model_data_size += total_correction;
 274         pm->model_data = d_malloc(pm->model_data_size);
 275         Assert(pm->model_data != NULL);
 276         memcpy(pm->model_data, tmp, pm->model_data_size);
 277         d_free(tmp);
 278 }
 279 #endif //def WORDS_NEED_ALIGNMENT
 280
 281 //reads a binary file containing a 3d model
 282 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 283 {
 284         CFILE *ifile;
 285         short version;
 286         int id,len, next_chunk;
 287         int anim_flag = 0;
 288         ubyte *model_buf;
 289
 290         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 291         if (!model_buf)
 292                 Error("Can't allocate space to read model %s\n", filename);
 293
 294         if ((ifile=cfopen(filename,"rb"))==NULL)
 295                 Error("Can't open file <%s>",filename);
 296
 297         Assert(ifile->size <= MODEL_BUF_SIZE);
 298
 299         Pof_addr = 0;
 300         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 301         cfclose(ifile);
 302
 303         id = pof_read_int(model_buf);
 304
 305         if (id!=0x4f505350) /* 'OPSP' */
 306                 Error("Bad ID in model file <%s>",filename);
 307
 308         version = pof_read_short(model_buf);
 309
 310         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 311                 Error("Bad version (%d) in model file <%s>",version,filename);
 312
 313         if ( FindArg( "-bspgen" ))
 314                 printf( "bspgen -c1" );
 315
 316         while (new_pof_read_int(id,model_buf) == 1) {
 317                 id = INTEL_INT(id);
 318                 //id  = pof_read_int(model_buf);
 319                 len = pof_read_int(model_buf);
 320                 next_chunk = Pof_addr + len;
 321
 322                 switch (id) {
 323
 324                         case ID_OHDR: {         //Object header
 325                                 vms_vector pmmin,pmmax;
 326
 327                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 328
 329                                 pm->n_models = pof_read_int(model_buf);
 330                                 pm->rad = pof_read_int(model_buf);
 331
 332                                 Assert(pm->n_models <= MAX_SUBMODELS);
 333
 334                                 pof_read_vecs(&pmmin,1,model_buf);
 335                                 pof_read_vecs(&pmmax,1,model_buf);
 336
 337                                 if ( FindArg( "-bspgen" ))      {
 338                                         vms_vector v;
 339                                         fix l;
 340
 341                                         vm_vec_sub(&v, &pmmax, &pmmin );
 342                                         l = v.x;
 343                                         if ( v.y > l ) l = v.y;
 344                                         if ( v.z > l ) l = v.z;
 345
 346                                         printf( " -l%.3f", f2fl(l) );
 347                                 }
 348
 349                                 break;
 350                         }
 351
 352                         case ID_SOBJ: {         //Subobject header
 353                                 int n;
 354
 355                                 anim_flag++;
 356
 357                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 358
 359                                 n = pof_read_short(model_buf);
 360
 361                                 Assert(n < MAX_SUBMODELS);
 362
 363                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 364
 365                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 366                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 367                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 368
 369                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 370
 371                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 372
 373                                 break;
 374
 375                         }
 376
 377                         #ifndef DRIVE
 378                         case ID_GUNS: {         //List of guns on this object
 379
 380                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 381
 382                                 if (r) {
 383                                         int i;
 384                                         vms_vector gun_dir;
 385                                         ubyte gun_used[MAX_GUNS];
 386
 387                                         r->n_guns = pof_read_int(model_buf);
 388
 389                                         if ( r->n_guns )
 390                                                 anim_flag++;
 391
 392                                         Assert(r->n_guns <= MAX_GUNS);
 393
 394                                         for (i=0;i<r->n_guns;i++)
 395                                                 gun_used[i] = 0;
 396
 397                                         for (i=0;i<r->n_guns;i++) {
 398                                                 int id;
 399
 400                                                 id = pof_read_short(model_buf);
 401                                                 Assert(id < r->n_guns);
 402                                                 Assert(gun_used[id] == 0);
 403                                                 gun_used[id] = 1;
 404                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 405                                                 Assert(r->gun_submodels[id] != 0xff);
 406                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 407
 408                                                 if (version >= 7)
 409                                                         pof_read_vecs(&gun_dir,1,model_buf);
 410                                         }
 411                                 }
 412                                 else
 413                                         pof_cfseek(model_buf,len,SEEK_CUR);
 414
 415                                 break;
 416                         }
 417
 418                         case ID_ANIM:           //Animation data
 419                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 420
 421                                 anim_flag++;
 422
 423                                 if (r) {
 424                                         int n_frames,f,m;
 425
 426                                         n_frames = pof_read_short(model_buf);
 427
 428                                         Assert(n_frames == N_ANIM_STATES);
 429
 430                                         for (m=0;m<pm->n_models;m++)
 431                                                 for (f=0;f<n_frames;f++)
 432                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 433
 434
 435                                         robot_set_angles(r,pm,anim_angs);
 436
 437                                 }
 438                                 else
 439                                         pof_cfseek(model_buf,len,SEEK_CUR);
 440
 441                                 break;
 442                         #endif
 443
 444                         case ID_TXTR: {         //Texture filename list
 445                                 int n;
 446                                 char name_buf[128];
 447
 448                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 449
 450                                 n = pof_read_short(model_buf);
 451                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 452                                 while (n--) {
 453                                         pof_read_string(name_buf,128,model_buf);
 454                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 455                                 }
 456
 457                                 break;
 458                         }
 459
 460                         case ID_IDTA:           //Interpreter data
 461                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 462
 463                                 pm->model_data = d_malloc(len);
 464                                 pm->model_data_size = len;
 465
 466                                 pof_cfread(pm->model_data,1,len,model_buf);
 467
 468                                 break;
 469
 470                         default:
 471                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 472                                 pof_cfseek(model_buf,len,SEEK_CUR);
 473                                 break;
 474
 475                 }
 476                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 477                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 478         }
 479
 480 //      for (i=0;i<pm->n_models;i++)
 481 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 482
 483         if ( FindArg( "-bspgen" )) {
 484                 char *p = strchr( filename, '.' );
 485                 *p = 0;
 486
 487                 if ( anim_flag > 1 )
 488                         printf( " -a" );
 489
 490                 printf( " %s.3ds\n", filename );
 491                 *p = '.';
 492         }
 493
 494         d_free(model_buf);
 495
 496 #ifdef WORDS_NEED_ALIGNMENT
 497         align_polygon_model_data(pm);
 498 #endif
 499 #ifdef WORDS_BIGENDIAN
 500         swap_polygon_model_data(pm->model_data);
 501 #endif
 502         //verify(pm->model_data);
 503
 504         return pm;
 505 }
 506
 507 //reads the gun information for a model
 508 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 509 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 510 {
 511         CFILE *ifile;
 512         short version;
 513         int id,len;
 514         int n_guns=0;
 515         ubyte   *model_buf;
 516
 517         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 518         if (!model_buf)
 519                 Error("Can't allocate space to read model %s\n", filename);
 520
 521         if ((ifile=cfopen(filename,"rb"))==NULL)
 522                 Error("Can't open file <%s>",filename);
 523
 524         Assert(ifile->size <= MODEL_BUF_SIZE);
 525
 526         Pof_addr = 0;
 527         Pof_file_end = cfread(model_buf, 1, ifile->size, ifile);
 528         cfclose(ifile);
 529
 530         id = pof_read_int(model_buf);
 531
 532         if (id!=0x4f505350) /* 'OPSP' */
 533                 Error("Bad ID in model file <%s>",filename);
 534
 535         version = pof_read_short(model_buf);
 536
 537         Assert(version >= 7);           //must be 7 or higher for this data
 538
 539         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 540                 Error("Bad version (%d) in model file <%s>",version,filename);
 541
 542         while (new_pof_read_int(id,model_buf) == 1) {
 543                 id = INTEL_INT(id);
 544                 //id  = pof_read_int(model_buf);
 545                 len = pof_read_int(model_buf);
 546
 547                 if (id == ID_GUNS) {            //List of guns on this object
 548
 549                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 550
 551                         int i;
 552
 553                         n_guns = pof_read_int(model_buf);
 554
 555                         for (i=0;i<n_guns;i++) {
 556                                 int id,sm;
 557
 558                                 id = pof_read_short(model_buf);
 559                                 sm = pof_read_short(model_buf);
 560                                 if (gun_submodels)
 561                                         gun_submodels[id] = sm;
 562                                 else if (sm!=0)
 563                                         Error("Invalid gun submodel in file <%s>",filename);
 564                                 pof_read_vecs(&gun_points[id],1,model_buf);
 565
 566                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 567                         }
 568
 569                 }
 570                 else
 571                         pof_cfseek(model_buf,len,SEEK_CUR);
 572
 573         }
 574
 575         d_free(model_buf);
 576
 577         return n_guns;
 578 }
 579
 580 //free up a model, getting rid of all its memory
 581 void free_model(polymodel *po)
 582 {
 583         d_free(po->model_data);
 584 }
 585
 586 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 587 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 588
 589 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 590
 591
 592 //draw a polygon model
 593
 594 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[])
 595 {
 596         polymodel *po;
 597         int i;
 598         PA_DFX (int save_light);
 599
 600         Assert(model_num < N_polygon_models);
 601
 602         po=&Polygon_models[model_num];
 603
 604         //check if should use simple model
 605         if (po->simpler_model )                                 //must have a simpler model
 606                 if (flags==0)                                                   //can't switch if this is debris
 607                         //!!if (!alt_textures) {                                //alternate textures might not match
 608                         //alt textures might not match, but in the one case we're using this
 609                         //for on 11/14/94, they do match.  So we leave it in.
 610                         {
 611                                 int cnt=1;
 612                                 fix depth;
 613
 614                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 615
 616                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 617                                         po = &Polygon_models[po->simpler_model-1];
 618                         }
 619
 620         if (alt_textures)
 621    {
 622                 for (i=0;i<po->n_textures;i++)  {
 623                         texture_list_index[i] = alt_textures[i];
 624                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 625
 626          #ifdef _3DFX
 627          texture_list[i]->bm_handle = texture_list_index[i].index;
 628          #endif
 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          #ifdef _3DFX
 638          texture_list[i]->bm_handle = texture_list_index[i].index;
 639          #endif
 640                 }
 641    }
 642
 643 #ifdef PIGGY_USE_PAGING
 644         // Make sure the textures for this object are paged in...
 645         piggy_page_flushed = 0;
 646         for (i=0;i<po->n_textures;i++)
 647                 PIGGY_PAGE_IN( texture_list_index[i] );
 648         // Hmmm... cache got flushed in the middle of paging all these in,
 649         // so we need to reread them all in.
 650         if (piggy_page_flushed) {
 651                 piggy_page_flushed = 0;
 652                 for (i=0;i<po->n_textures;i++)
 653                         PIGGY_PAGE_IN( texture_list_index[i] );
 654         }
 655         // Make sure that they can all fit in memory.
 656         Assert( piggy_page_flushed == 0 );
 657 #endif
 658
 659         g3_start_instance_matrix(pos,orient);
 660
 661         g3_set_interp_points(robot_points);
 662
 663 #ifdef _3DFX
 664    _3dfx_rendering_poly_obj = 1;
 665 #endif
 666         PA_DFX(save_light = Lighting_on);
 667         PA_DFX(Lighting_on = 0);
 668
 669         if (flags == 0)         //draw entire object
 670
 671                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 672
 673         else {
 674                 int i;
 675
 676                 for (i=0;flags;flags>>=1,i++)
 677                         if (flags & 1) {
 678                                 vms_vector ofs;
 679
 680                                 Assert(i < po->n_models);
 681
 682                                 //if submodel, rotate around its center point, not pivot point
 683
 684                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 685                                 vm_vec_negate(&ofs);
 686                                 g3_start_instance_matrix(&ofs,NULL);
 687
 688                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 689
 690                                 g3_done_instance();
 691                         }
 692         }
 693
 694         g3_done_instance();
 695
 696 #ifdef _3DFX
 697    _3dfx_rendering_poly_obj = 0;
 698 #endif
 699
 700         PA_DFX (Lighting_on = save_light);
 701
 702
 703 }
 704
 705 void free_polygon_models()
 706 {
 707         int i;
 708
 709         for (i=0;i<N_polygon_models;i++) {
 710                 free_model(&Polygon_models[i]);
 711         }
 712
 713 }
 714
 715 void polyobj_find_min_max(polymodel *pm)
 716 {
 717         ushort nverts;
 718         vms_vector *vp;
 719         ushort *data,type;
 720         int m;
 721         vms_vector *big_mn,*big_mx;
 722
 723         big_mn = &pm->mins;
 724         big_mx = &pm->maxs;
 725
 726         for (m=0;m<pm->n_models;m++) {
 727                 vms_vector *mn,*mx,*ofs;
 728
 729                 mn = &pm->submodel_mins[m];
 730                 mx = &pm->submodel_maxs[m];
 731                 ofs= &pm->submodel_offsets[m];
 732
 733                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 734
 735                 type = *data++;
 736
 737                 Assert(type == 7 || type == 1);
 738
 739                 nverts = *data++;
 740
 741                 if (type==7)
 742                         data+=2;                //skip start & pad
 743
 744                 vp = (vms_vector *) data;
 745
 746                 *mn = *mx = *vp++; nverts--;
 747
 748                 if (m==0)
 749                         *big_mn = *big_mx = *mn;
 750
 751                 while (nverts--) {
 752                         if (vp->x > mx->x) mx->x = vp->x;
 753                         if (vp->y > mx->y) mx->y = vp->y;
 754                         if (vp->z > mx->z) mx->z = vp->z;
 755
 756                         if (vp->x < mn->x) mn->x = vp->x;
 757                         if (vp->y < mn->y) mn->y = vp->y;
 758                         if (vp->z < mn->z) mn->z = vp->z;
 759
 760                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 761                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 762                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 763
 764                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 765                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 766                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 767
 768                         vp++;
 769                 }
 770
 771 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 772         }
 773
 774 //      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);
 775
 776 }
 777
 778 extern short highest_texture_num;       //from the 3d
 779
 780 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 781
 782 //returns the number of this model
 783 #ifndef DRIVE
 784 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 785 #else
 786 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 787 #endif
 788 {
 789         #ifdef DRIVE
 790         #define r NULL
 791         #endif
 792
 793         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 794         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 795
 796         //      MK was real tired of those useless, slow mprintfs...
 797         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 798                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 799
 800         Assert(strlen(filename) <= 12);
 801         strcpy(Pof_names[N_polygon_models],filename);
 802
 803         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 804
 805         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 806
 807         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 808
 809         if (highest_texture_num+1 != n_textures)
 810                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 811
 812         Polygon_models[N_polygon_models].n_textures = n_textures;
 813         Polygon_models[N_polygon_models].first_texture = first_texture;
 814         Polygon_models[N_polygon_models].simpler_model = 0;
 815
 816 //      Assert(polygon_models[N_polygon_models]!=NULL);
 817
 818         N_polygon_models++;
 819
 820         return N_polygon_models-1;
 821
 822 }
 823
 824
 825 void init_polygon_models()
 826 {
 827         N_polygon_models = 0;
 828
 829         atexit((void (*)())free_polygon_models);
 830
 831 }
 832
 833 //compare against this size when figuring how far to place eye for picture
 834 #define BASE_MODEL_SIZE 0x28000
 835
 836 #define DEFAULT_VIEW_DIST 0x60000
 837
 838 //draws the given model in the current canvas.  The distance is set to
 839 //more-or-less fill the canvas.  Note that this routine actually renders
 840 //into an off-screen canvas that it creates, then copies to the current
 841 //canvas.
 842 void draw_model_picture(int mn,vms_angvec *orient_angles)
 843 {
 844         vms_vector      temp_pos=ZERO_VECTOR;
 845         vms_matrix      temp_orient = IDENTITY_MATRIX;
 846         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 847
 848         Assert(mn>=0 && mn<N_polygon_models);
 849
 850         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 851         gr_set_current_canvas(temp_canv);
 852         gr_clear_canvas( BM_XRGB(0,0,0) );
 853
 854         g3_start_frame();
 855         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 856
 857         if (Polygon_models[mn].rad != 0)
 858                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 859         else
 860                 temp_pos.z = DEFAULT_VIEW_DIST;
 861
 862         vm_angles_2_matrix(&temp_orient, orient_angles);
 863
 864         PA_DFX(save_light = Lighting_on);
 865         PA_DFX(Lighting_on = 0);
 866         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 867         PA_DFX (Lighting_on = save_light);
 868
 869         gr_set_current_canvas(save_canv);
 870
 871         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 872
 873         gr_free_canvas(temp_canv);
 874 }
 875
 876 #ifndef FAST_FILE_IO
 877 /*
 878  * reads a polymodel structure from a CFILE
 879  */
 880 extern void polymodel_read(polymodel *pm, CFILE *fp)
 881 {
 882         int i;
 883
 884         pm->n_models = cfile_read_int(fp);
 885         pm->model_data_size = cfile_read_int(fp);
 886         pm->model_data = (ubyte *) cfile_read_int(fp);
 887         for (i = 0; i < MAX_SUBMODELS; i++)
 888                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 889         for (i = 0; i < MAX_SUBMODELS; i++)
 890                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 891         for (i = 0; i < MAX_SUBMODELS; i++)
 892                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 893         for (i = 0; i < MAX_SUBMODELS; i++)
 894                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 895         for (i = 0; i < MAX_SUBMODELS; i++)
 896                 pm->submodel_rads[i] = cfile_read_fix(fp);
 897         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 898         for (i = 0; i < MAX_SUBMODELS; i++)
 899                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 900         for (i = 0; i < MAX_SUBMODELS; i++)
 901                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 902         cfile_read_vector(&(pm->mins), fp);
 903         cfile_read_vector(&(pm->maxs), fp);
 904         pm->rad = cfile_read_fix(fp);
 905         pm->n_textures = cfile_read_byte(fp);
 906         pm->first_texture = cfile_read_short(fp);
 907         pm->simpler_model = cfile_read_byte(fp);
 908 }
 909
 910 /*
 911  * reads n polymodel structs from a CFILE
 912  */
 913 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 914 {
 915         int i, j;
 916
 917         for (i = 0; i < n; i++) {
 918                 pm[i].n_models = cfile_read_int(fp);
 919                 pm[i].model_data_size = cfile_read_int(fp);
 920                 pm[i].model_data = (ubyte *) cfile_read_int(fp);
 921                 for (j = 0; j < MAX_SUBMODELS; j++)
 922                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 923                 for (j = 0; j < MAX_SUBMODELS; j++)
 924                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 925                 for (j = 0; j < MAX_SUBMODELS; j++)
 926                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 927                 for (j = 0; j < MAX_SUBMODELS; j++)
 928                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 929                 for (j = 0; j < MAX_SUBMODELS; j++)
 930                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 931                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 932                 for (j = 0; j < MAX_SUBMODELS; j++)
 933                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 934                 for (j = 0; j < MAX_SUBMODELS; j++)
 935                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 936                 cfile_read_vector(&(pm[i].mins), fp);
 937                 cfile_read_vector(&(pm[i].maxs), fp);
 938                 pm[i].rad = cfile_read_fix(fp);
 939                 pm[i].n_textures = cfile_read_byte(fp);
 940                 pm[i].first_texture = cfile_read_short(fp);
 941                 pm[i].simpler_model = cfile_read_byte(fp);
 942         }
 943         return i;
 944 }
 945 #endif
 946
 947
 948 /*
 949  * routine which allocates, reads, and inits a polymodel's model_data
 950  */
 951 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 952 {
 953         pm->model_data = d_malloc(pm->model_data_size);
 954         Assert(pm->model_data != NULL);
 955         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 956 #ifdef WORDS_NEED_ALIGNMENT
 957         align_polygon_model_data(pm);
 958 #endif
 959 #ifdef WORDS_BIGENDIAN
 960         swap_polygon_model_data(pm->model_data);
 961 #endif
 962         //verify(pm->model_data);
 963         g3_init_polygon_model(pm->model_data);
 964 }