main/polyobj.c

   1 /* $Id: polyobj.c,v 1.21 2005-07-30 01:50:17 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 1.21 2005-07-30 01:50:17 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 _3DFX
  61 #include "3dfx_des.h"
  62 #endif
  63
  64 #ifdef OGL
  65 #include "ogl_init.h"
  66 #endif
  67
  68 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  69
  70 int N_polygon_models = 0;
  71
  72 #define MAX_POLYGON_VECS 1000
  73 g3s_point robot_points[MAX_POLYGON_VECS];
  74
  75 #define PM_COMPATIBLE_VERSION 6
  76 #define PM_OBJFILE_VERSION 8
  77
  78 int     Pof_file_end;
  79 int     Pof_addr;
  80
  81 #define MODEL_BUF_SIZE  32768
  82
  83 void _pof_cfseek(int len,int type)
  84 {
  85         switch (type) {
  86                 case SEEK_SET:  Pof_addr = len; break;
  87                 case SEEK_CUR:  Pof_addr += len;        break;
  88                 case SEEK_END:
  89                         Assert(len <= 0);       //      seeking from end, better be moving back.
  90                         Pof_addr = Pof_file_end + len;
  91                         break;
  92         }
  93
  94         if (Pof_addr > MODEL_BUF_SIZE)
  95                 Int3();
  96 }
  97
  98 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
  99
 100 int pof_read_int(ubyte *bufp)
 101 {
 102         int i;
 103
 104         i = *((int *) &bufp[Pof_addr]);
 105         Pof_addr += 4;
 106         return INTEL_INT(i);
 107
 108 //      if (cfread(&i,sizeof(i),1,f) != 1)
 109 //              Error("Unexpected end-of-file while reading object");
 110 //
 111 //      return i;
 112 }
 113
 114 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 115 {
 116         if (Pof_addr + nelem*elsize > Pof_file_end)
 117                 return 0;
 118
 119         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 120
 121         Pof_addr += elsize*nelem;
 122
 123         if (Pof_addr > MODEL_BUF_SIZE)
 124                 Int3();
 125
 126         return nelem;
 127 }
 128
 129 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 130 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 131
 132 short pof_read_short(ubyte *bufp)
 133 {
 134         short s;
 135
 136         s = *((short *) &bufp[Pof_addr]);
 137         Pof_addr += 2;
 138         return INTEL_SHORT(s);
 139 //      if (cfread(&s,sizeof(s),1,f) != 1)
 140 //              Error("Unexpected end-of-file while reading object");
 141 //
 142 //      return s;
 143 }
 144
 145 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 146 {
 147         int     i;
 148
 149         for (i=0; i<max_char; i++) {
 150                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 151                         break;
 152         }
 153
 154 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 155
 156 }
 157
 158 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 159 {
 160 //      cfread(vecs,sizeof(vms_vector),n,f);
 161
 162         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 163         Pof_addr += n*sizeof(*vecs);
 164
 165 #ifdef WORDS_BIGENDIAN
 166         while (n > 0)
 167                 vms_vector_swap(&vecs[--n]);
 168 #endif
 169
 170         if (Pof_addr > MODEL_BUF_SIZE)
 171                 Int3();
 172 }
 173
 174 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 175 {
 176         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 177         Pof_addr += n*sizeof(*angs);
 178
 179 #ifdef WORDS_BIGENDIAN
 180         while (n > 0)
 181                 vms_angvec_swap(&angs[--n]);
 182 #endif
 183
 184         if (Pof_addr > MODEL_BUF_SIZE)
 185                 Int3();
 186 }
 187
 188 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 189 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 190 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 191 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 192 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 193 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 194
 195 #ifdef DRIVE
 196 #define robot_info void
 197 #else
 198 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 199
 200 //set the animation angles for this robot.  Gun fields of robot info must
 201 //be filled in.
 202 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 203 #endif
 204
 205 #define DEBUG_LEVEL CON_NORMAL
 206
 207 #ifdef WORDS_NEED_ALIGNMENT
 208 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 209 {
 210         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 211 }
 212 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 213 {
 214         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 215 }
 216 /*
 217  * find chunk with smallest address
 218  */
 219 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 220 {
 221         int i, first_index = 0;
 222         Assert(no_chunks >= 1);
 223         for (i = 1; i < no_chunks; i++)
 224                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 225                         first_index = i;
 226         return first_index;
 227 }
 228 #define SHIFT_SPACE 500 // increase if insufficent
 229
 230 void align_polygon_model_data(polymodel *pm)
 231 {
 232         int i, chunk_len;
 233         int total_correction = 0;
 234         ubyte *cur_old, *cur_new;
 235         chunk cur_ch;
 236         chunk ch_list[MAX_CHUNKS];
 237         int no_chunks = 0;
 238         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 239         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 240
 241         Assert(tmp != NULL);
 242         //start with first chunk (is always aligned!)
 243         cur_old = pm->model_data;
 244         cur_new = tmp;
 245         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 246         memcpy(cur_new, cur_old, chunk_len);
 247         while (no_chunks > 0) {
 248                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 249                 cur_ch = ch_list[first_index];
 250                 // remove first chunk from array:
 251                 no_chunks--;
 252                 for (i = first_index; i < no_chunks; i++)
 253                         ch_list[i] = ch_list[i + 1];
 254                 // if (new) address unaligned:
 255                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 256                         // calculate how much to move to be aligned
 257                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 258                         // correct chunks' addresses
 259                         cur_ch.correction += to_shift;
 260                         for (i = 0; i < no_chunks; i++)
 261                                 ch_list[i].correction += to_shift;
 262                         total_correction += to_shift;
 263                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 264                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 265                 }
 266                 //write (corrected) chunk for current chunk:
 267                 *((short *)(cur_ch.new_base + cur_ch.offset))
 268                   = INTEL_SHORT(cur_ch.correction
 269                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 270                 //write (correctly aligned) chunk:
 271                 cur_old = old_dest(cur_ch);
 272                 cur_new = new_dest(cur_ch);
 273                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 274                 memcpy(cur_new, cur_old, chunk_len);
 275                 //correct submodel_ptr's for pm, too
 276                 for (i = 0; i < MAX_SUBMODELS; i++)
 277                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 278                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 279                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 280         }
 281         d_free(pm->model_data);
 282         pm->model_data_size += total_correction;
 283         pm->model_data = d_malloc(pm->model_data_size);
 284         Assert(pm->model_data != NULL);
 285         memcpy(pm->model_data, tmp, pm->model_data_size);
 286         d_free(tmp);
 287 }
 288 #endif //def WORDS_NEED_ALIGNMENT
 289
 290 //reads a binary file containing a 3d model
 291 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 292 {
 293         CFILE *ifile;
 294         short version;
 295         int id,len, next_chunk;
 296         int anim_flag = 0;
 297         ubyte *model_buf;
 298
 299         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 300         if (!model_buf)
 301                 Error("Can't allocate space to read model %s\n", filename);
 302
 303         if ((ifile=cfopen(filename,"rb"))==NULL)
 304                 Error("Can't open file <%s>",filename);
 305
 306         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 307
 308         Pof_addr = 0;
 309         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 310         cfclose(ifile);
 311
 312         id = pof_read_int(model_buf);
 313
 314         if (id!=0x4f505350) /* 'OPSP' */
 315                 Error("Bad ID in model file <%s>",filename);
 316
 317         version = pof_read_short(model_buf);
 318
 319         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 320                 Error("Bad version (%d) in model file <%s>",version,filename);
 321
 322         if ( FindArg( "-bspgen" ))
 323                 printf( "bspgen -c1" );
 324
 325         while (new_pof_read_int(id,model_buf) == 1) {
 326                 id = INTEL_INT(id);
 327                 //id  = pof_read_int(model_buf);
 328                 len = pof_read_int(model_buf);
 329                 next_chunk = Pof_addr + len;
 330
 331                 switch (id) {
 332
 333                         case ID_OHDR: {         //Object header
 334                                 vms_vector pmmin,pmmax;
 335
 336                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 337
 338                                 pm->n_models = pof_read_int(model_buf);
 339                                 pm->rad = pof_read_int(model_buf);
 340
 341                                 Assert(pm->n_models <= MAX_SUBMODELS);
 342
 343                                 pof_read_vecs(&pmmin,1,model_buf);
 344                                 pof_read_vecs(&pmmax,1,model_buf);
 345
 346                                 if ( FindArg( "-bspgen" ))      {
 347                                         vms_vector v;
 348                                         fix l;
 349
 350                                         vm_vec_sub(&v, &pmmax, &pmmin );
 351                                         l = v.x;
 352                                         if ( v.y > l ) l = v.y;
 353                                         if ( v.z > l ) l = v.z;
 354
 355                                         printf( " -l%.3f", f2fl(l) );
 356                                 }
 357
 358                                 break;
 359                         }
 360
 361                         case ID_SOBJ: {         //Subobject header
 362                                 int n;
 363
 364                                 anim_flag++;
 365
 366                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 367
 368                                 n = pof_read_short(model_buf);
 369
 370                                 Assert(n < MAX_SUBMODELS);
 371
 372                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 373
 374                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 375                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 376                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 377
 378                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 379
 380                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 381
 382                                 break;
 383
 384                         }
 385
 386                         #ifndef DRIVE
 387                         case ID_GUNS: {         //List of guns on this object
 388
 389                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 390
 391                                 if (r) {
 392                                         int i;
 393                                         vms_vector gun_dir;
 394                                         ubyte gun_used[MAX_GUNS];
 395
 396                                         r->n_guns = pof_read_int(model_buf);
 397
 398                                         if ( r->n_guns )
 399                                                 anim_flag++;
 400
 401                                         Assert(r->n_guns <= MAX_GUNS);
 402
 403                                         for (i=0;i<r->n_guns;i++)
 404                                                 gun_used[i] = 0;
 405
 406                                         for (i=0;i<r->n_guns;i++) {
 407                                                 int id;
 408
 409                                                 id = pof_read_short(model_buf);
 410                                                 Assert(id < r->n_guns);
 411                                                 Assert(gun_used[id] == 0);
 412                                                 gun_used[id] = 1;
 413                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 414                                                 Assert(r->gun_submodels[id] != 0xff);
 415                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 416
 417                                                 if (version >= 7)
 418                                                         pof_read_vecs(&gun_dir,1,model_buf);
 419                                         }
 420                                 }
 421                                 else
 422                                         pof_cfseek(model_buf,len,SEEK_CUR);
 423
 424                                 break;
 425                         }
 426
 427                         case ID_ANIM:           //Animation data
 428                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 429
 430                                 anim_flag++;
 431
 432                                 if (r) {
 433                                         int n_frames,f,m;
 434
 435                                         n_frames = pof_read_short(model_buf);
 436
 437                                         Assert(n_frames == N_ANIM_STATES);
 438
 439                                         for (m=0;m<pm->n_models;m++)
 440                                                 for (f=0;f<n_frames;f++)
 441                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 442
 443
 444                                         robot_set_angles(r,pm,anim_angs);
 445
 446                                 }
 447                                 else
 448                                         pof_cfseek(model_buf,len,SEEK_CUR);
 449
 450                                 break;
 451                         #endif
 452
 453                         case ID_TXTR: {         //Texture filename list
 454                                 int n;
 455                                 char name_buf[128];
 456
 457                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 458
 459                                 n = pof_read_short(model_buf);
 460                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 461                                 while (n--) {
 462                                         pof_read_string(name_buf,128,model_buf);
 463                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 464                                 }
 465
 466                                 break;
 467                         }
 468
 469                         case ID_IDTA:           //Interpreter data
 470                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 471
 472                                 pm->model_data = d_malloc(len);
 473                                 pm->model_data_size = len;
 474
 475                                 pof_cfread(pm->model_data,1,len,model_buf);
 476
 477                                 break;
 478
 479                         default:
 480                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 481                                 pof_cfseek(model_buf,len,SEEK_CUR);
 482                                 break;
 483
 484                 }
 485                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 486                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 487         }
 488
 489 //      for (i=0;i<pm->n_models;i++)
 490 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 491
 492         if ( FindArg( "-bspgen" )) {
 493                 char *p = strchr( filename, '.' );
 494                 *p = 0;
 495
 496                 if ( anim_flag > 1 )
 497                         printf( " -a" );
 498
 499                 printf( " %s.3ds\n", filename );
 500                 *p = '.';
 501         }
 502
 503         d_free(model_buf);
 504
 505 #ifdef WORDS_NEED_ALIGNMENT
 506         align_polygon_model_data(pm);
 507 #endif
 508 #ifdef WORDS_BIGENDIAN
 509         swap_polygon_model_data(pm->model_data);
 510 #endif
 511         //verify(pm->model_data);
 512
 513         return pm;
 514 }
 515
 516 //reads the gun information for a model
 517 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 518 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 519 {
 520         CFILE *ifile;
 521         short version;
 522         int id,len;
 523         int n_guns=0;
 524         ubyte   *model_buf;
 525
 526         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 527         if (!model_buf)
 528                 Error("Can't allocate space to read model %s\n", filename);
 529
 530         if ((ifile=cfopen(filename,"rb"))==NULL)
 531                 Error("Can't open file <%s>",filename);
 532
 533         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 534
 535         Pof_addr = 0;
 536         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 537         cfclose(ifile);
 538
 539         id = pof_read_int(model_buf);
 540
 541         if (id!=0x4f505350) /* 'OPSP' */
 542                 Error("Bad ID in model file <%s>",filename);
 543
 544         version = pof_read_short(model_buf);
 545
 546         Assert(version >= 7);           //must be 7 or higher for this data
 547
 548         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 549                 Error("Bad version (%d) in model file <%s>",version,filename);
 550
 551         while (new_pof_read_int(id,model_buf) == 1) {
 552                 id = INTEL_INT(id);
 553                 //id  = pof_read_int(model_buf);
 554                 len = pof_read_int(model_buf);
 555
 556                 if (id == ID_GUNS) {            //List of guns on this object
 557
 558                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 559
 560                         int i;
 561
 562                         n_guns = pof_read_int(model_buf);
 563
 564                         for (i=0;i<n_guns;i++) {
 565                                 int id,sm;
 566
 567                                 id = pof_read_short(model_buf);
 568                                 sm = pof_read_short(model_buf);
 569                                 if (gun_submodels)
 570                                         gun_submodels[id] = sm;
 571                                 else if (sm!=0)
 572                                         Error("Invalid gun submodel in file <%s>",filename);
 573                                 pof_read_vecs(&gun_points[id],1,model_buf);
 574
 575                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 576                         }
 577
 578                 }
 579                 else
 580                         pof_cfseek(model_buf,len,SEEK_CUR);
 581
 582         }
 583
 584         d_free(model_buf);
 585
 586         return n_guns;
 587 }
 588
 589 //free up a model, getting rid of all its memory
 590 void free_model(polymodel *po)
 591 {
 592         d_free(po->model_data);
 593 }
 594
 595 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 596 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 597
 598 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 599
 600
 601 //draw a polygon model
 602
 603 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[])
 604 {
 605         polymodel *po;
 606         int i;
 607
 608         Assert(model_num < N_polygon_models);
 609
 610         po=&Polygon_models[model_num];
 611
 612         //check if should use simple model
 613         if (po->simpler_model )                                 //must have a simpler model
 614                 if (flags==0)                                                   //can't switch if this is debris
 615                         //!!if (!alt_textures) {                                //alternate textures might not match
 616                         //alt textures might not match, but in the one case we're using this
 617                         //for on 11/14/94, they do match.  So we leave it in.
 618                         {
 619                                 int cnt=1;
 620                                 fix depth;
 621
 622                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 623
 624                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 625                                         po = &Polygon_models[po->simpler_model-1];
 626                         }
 627
 628         if (alt_textures)
 629    {
 630                 for (i=0;i<po->n_textures;i++)  {
 631                         texture_list_index[i] = alt_textures[i];
 632                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 633
 634          #ifdef _3DFX
 635          texture_list[i]->bm_handle = texture_list_index[i].index;
 636          #endif
 637                 }
 638    }
 639         else
 640    {
 641                 for (i=0;i<po->n_textures;i++)  {
 642                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 643                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 644
 645          #ifdef _3DFX
 646          texture_list[i]->bm_handle = texture_list_index[i].index;
 647          #endif
 648                 }
 649    }
 650
 651 #ifdef PIGGY_USE_PAGING
 652         // Make sure the textures for this object are paged in...
 653         piggy_page_flushed = 0;
 654         for (i=0;i<po->n_textures;i++)
 655                 PIGGY_PAGE_IN( texture_list_index[i] );
 656         // Hmmm... cache got flushed in the middle of paging all these in,
 657         // so we need to reread them all in.
 658         if (piggy_page_flushed) {
 659                 piggy_page_flushed = 0;
 660                 for (i=0;i<po->n_textures;i++)
 661                         PIGGY_PAGE_IN( texture_list_index[i] );
 662         }
 663         // Make sure that they can all fit in memory.
 664         Assert( piggy_page_flushed == 0 );
 665 #endif
 666
 667         g3_start_instance_matrix(pos,orient);
 668
 669         g3_set_interp_points(robot_points);
 670
 671 #ifdef _3DFX
 672    _3dfx_rendering_poly_obj = 1;
 673 #endif
 674
 675         if (flags == 0)         //draw entire object
 676
 677                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 678
 679         else {
 680                 int i;
 681
 682                 for (i=0;flags;flags>>=1,i++)
 683                         if (flags & 1) {
 684                                 vms_vector ofs;
 685
 686                                 Assert(i < po->n_models);
 687
 688                                 //if submodel, rotate around its center point, not pivot point
 689
 690                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 691                                 vm_vec_negate(&ofs);
 692                                 g3_start_instance_matrix(&ofs,NULL);
 693
 694                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 695
 696                                 g3_done_instance();
 697                         }
 698         }
 699
 700         g3_done_instance();
 701
 702 #ifdef _3DFX
 703    _3dfx_rendering_poly_obj = 0;
 704 #endif
 705 }
 706
 707 void free_polygon_models()
 708 {
 709         int i;
 710
 711         for (i=0;i<N_polygon_models;i++) {
 712                 free_model(&Polygon_models[i]);
 713         }
 714
 715 }
 716
 717 void polyobj_find_min_max(polymodel *pm)
 718 {
 719         ushort nverts;
 720         vms_vector *vp;
 721         ushort *data,type;
 722         int m;
 723         vms_vector *big_mn,*big_mx;
 724
 725         big_mn = &pm->mins;
 726         big_mx = &pm->maxs;
 727
 728         for (m=0;m<pm->n_models;m++) {
 729                 vms_vector *mn,*mx,*ofs;
 730
 731                 mn = &pm->submodel_mins[m];
 732                 mx = &pm->submodel_maxs[m];
 733                 ofs= &pm->submodel_offsets[m];
 734
 735                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 736
 737                 type = *data++;
 738
 739                 Assert(type == 7 || type == 1);
 740
 741                 nverts = *data++;
 742
 743                 if (type==7)
 744                         data+=2;                //skip start & pad
 745
 746                 vp = (vms_vector *) data;
 747
 748                 *mn = *mx = *vp++; nverts--;
 749
 750                 if (m==0)
 751                         *big_mn = *big_mx = *mn;
 752
 753                 while (nverts--) {
 754                         if (vp->x > mx->x) mx->x = vp->x;
 755                         if (vp->y > mx->y) mx->y = vp->y;
 756                         if (vp->z > mx->z) mx->z = vp->z;
 757
 758                         if (vp->x < mn->x) mn->x = vp->x;
 759                         if (vp->y < mn->y) mn->y = vp->y;
 760                         if (vp->z < mn->z) mn->z = vp->z;
 761
 762                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 763                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 764                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 765
 766                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 767                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 768                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 769
 770                         vp++;
 771                 }
 772
 773 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 774         }
 775
 776 //      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);
 777
 778 }
 779
 780 extern short highest_texture_num;       //from the 3d
 781
 782 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 783
 784 //returns the number of this model
 785 #ifndef DRIVE
 786 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 787 #else
 788 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 789 #endif
 790 {
 791         #ifdef DRIVE
 792         #define r NULL
 793         #endif
 794
 795         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 796         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 797
 798         //      MK was real tired of those useless, slow mprintfs...
 799         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 800                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 801
 802         Assert(strlen(filename) <= 12);
 803         strcpy(Pof_names[N_polygon_models],filename);
 804
 805         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 806
 807         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 808
 809         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 810
 811         if (highest_texture_num+1 != n_textures)
 812                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 813
 814         Polygon_models[N_polygon_models].n_textures = n_textures;
 815         Polygon_models[N_polygon_models].first_texture = first_texture;
 816         Polygon_models[N_polygon_models].simpler_model = 0;
 817
 818 //      Assert(polygon_models[N_polygon_models]!=NULL);
 819
 820         N_polygon_models++;
 821
 822         return N_polygon_models-1;
 823
 824 }
 825
 826
 827 void init_polygon_models()
 828 {
 829         N_polygon_models = 0;
 830
 831         atexit((void (*)())free_polygon_models);
 832
 833 }
 834
 835 //compare against this size when figuring how far to place eye for picture
 836 #define BASE_MODEL_SIZE 0x28000
 837
 838 #define DEFAULT_VIEW_DIST 0x60000
 839
 840 //draws the given model in the current canvas.  The distance is set to
 841 //more-or-less fill the canvas.  Note that this routine actually renders
 842 //into an off-screen canvas that it creates, then copies to the current
 843 //canvas.
 844 void draw_model_picture(int mn,vms_angvec *orient_angles)
 845 {
 846         vms_vector      temp_pos=ZERO_VECTOR;
 847         vms_matrix      temp_orient = IDENTITY_MATRIX;
 848 #ifndef OGL
 849         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 850 #endif
 851
 852         Assert(mn>=0 && mn<N_polygon_models);
 853
 854 #ifdef OGL
 855         ogl_start_offscreen_render(0, 0, grd_curcanv->cv_bitmap.bm_w, grd_curcanv->cv_bitmap.bm_h);
 856 #else
 857         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 858         gr_set_current_canvas(temp_canv);
 859 #endif
 860         gr_clear_canvas( BM_XRGB(0,0,0) );
 861
 862         g3_start_frame();
 863         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 864
 865         if (Polygon_models[mn].rad != 0)
 866                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 867         else
 868                 temp_pos.z = DEFAULT_VIEW_DIST;
 869
 870         vm_angles_2_matrix(&temp_orient, orient_angles);
 871
 872         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 873
 874         g3_end_frame();
 875
 876 #ifdef OGL
 877         ogl_end_offscreen_render();
 878 #else
 879         gr_set_current_canvas(save_canv);
 880
 881         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 882
 883         gr_free_canvas(temp_canv);
 884 #endif
 885 }
 886
 887 #ifndef FAST_FILE_IO
 888 /*
 889  * reads a polymodel structure from a CFILE
 890  */
 891 extern void polymodel_read(polymodel *pm, CFILE *fp)
 892 {
 893         int i;
 894
 895         pm->n_models = cfile_read_int(fp);
 896         pm->model_data_size = cfile_read_int(fp);
 897         pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 898         for (i = 0; i < MAX_SUBMODELS; i++)
 899                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 900         for (i = 0; i < MAX_SUBMODELS; i++)
 901                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 902         for (i = 0; i < MAX_SUBMODELS; i++)
 903                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 904         for (i = 0; i < MAX_SUBMODELS; i++)
 905                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 906         for (i = 0; i < MAX_SUBMODELS; i++)
 907                 pm->submodel_rads[i] = cfile_read_fix(fp);
 908         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 909         for (i = 0; i < MAX_SUBMODELS; i++)
 910                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 911         for (i = 0; i < MAX_SUBMODELS; i++)
 912                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 913         cfile_read_vector(&(pm->mins), fp);
 914         cfile_read_vector(&(pm->maxs), fp);
 915         pm->rad = cfile_read_fix(fp);
 916         pm->n_textures = cfile_read_byte(fp);
 917         pm->first_texture = cfile_read_short(fp);
 918         pm->simpler_model = cfile_read_byte(fp);
 919 }
 920
 921 /*
 922  * reads n polymodel structs from a CFILE
 923  */
 924 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 925 {
 926         int i, j;
 927
 928         for (i = 0; i < n; i++) {
 929                 pm[i].n_models = cfile_read_int(fp);
 930                 pm[i].model_data_size = cfile_read_int(fp);
 931                 pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 932                 for (j = 0; j < MAX_SUBMODELS; j++)
 933                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 934                 for (j = 0; j < MAX_SUBMODELS; j++)
 935                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 936                 for (j = 0; j < MAX_SUBMODELS; j++)
 937                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 938                 for (j = 0; j < MAX_SUBMODELS; j++)
 939                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 940                 for (j = 0; j < MAX_SUBMODELS; j++)
 941                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 942                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 943                 for (j = 0; j < MAX_SUBMODELS; j++)
 944                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 945                 for (j = 0; j < MAX_SUBMODELS; j++)
 946                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 947                 cfile_read_vector(&(pm[i].mins), fp);
 948                 cfile_read_vector(&(pm[i].maxs), fp);
 949                 pm[i].rad = cfile_read_fix(fp);
 950                 pm[i].n_textures = cfile_read_byte(fp);
 951                 pm[i].first_texture = cfile_read_short(fp);
 952                 pm[i].simpler_model = cfile_read_byte(fp);
 953         }
 954         return i;
 955 }
 956 #endif
 957
 958
 959 /*
 960  * routine which allocates, reads, and inits a polymodel's model_data
 961  */
 962 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 963 {
 964         pm->model_data = d_malloc(pm->model_data_size);
 965         Assert(pm->model_data != NULL);
 966         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 967 #ifdef WORDS_NEED_ALIGNMENT
 968         align_polygon_model_data(pm);
 969 #endif
 970 #ifdef WORDS_BIGENDIAN
 971         swap_polygon_model_data(pm->model_data);
 972 #endif
 973         //verify(pm->model_data);
 974         g3_init_polygon_model(pm->model_data);
 975 }