main/polyobj.c

   1 /* $Id: polyobj.c,v 1.20 2004-11-27 12:28:10 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  */
  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 1.20 2004-11-27 12:28:10 btb 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 #include "pa_enabl.h"
  61
  62 #ifdef _3DFX
  63 #include "3dfx_des.h"
  64 #endif
  65
  66 #ifdef OGL
  67 #include "ogl_init.h"
  68 #endif
  69
  70 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  71
  72 int N_polygon_models = 0;
  73
  74 #define MAX_POLYGON_VECS 1000
  75 g3s_point robot_points[MAX_POLYGON_VECS];
  76
  77 #define PM_COMPATIBLE_VERSION 6
  78 #define PM_OBJFILE_VERSION 8
  79
  80 int     Pof_file_end;
  81 int     Pof_addr;
  82
  83 #define MODEL_BUF_SIZE  32768
  84
  85 void _pof_cfseek(int len,int type)
  86 {
  87         switch (type) {
  88                 case SEEK_SET:  Pof_addr = len; break;
  89                 case SEEK_CUR:  Pof_addr += len;        break;
  90                 case SEEK_END:
  91                         Assert(len <= 0);       //      seeking from end, better be moving back.
  92                         Pof_addr = Pof_file_end + len;
  93                         break;
  94         }
  95
  96         if (Pof_addr > MODEL_BUF_SIZE)
  97                 Int3();
  98 }
  99
 100 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
 101
 102 int pof_read_int(ubyte *bufp)
 103 {
 104         int i;
 105
 106         i = *((int *) &bufp[Pof_addr]);
 107         Pof_addr += 4;
 108         return INTEL_INT(i);
 109
 110 //      if (cfread(&i,sizeof(i),1,f) != 1)
 111 //              Error("Unexpected end-of-file while reading object");
 112 //
 113 //      return i;
 114 }
 115
 116 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 117 {
 118         if (Pof_addr + nelem*elsize > Pof_file_end)
 119                 return 0;
 120
 121         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 122
 123         Pof_addr += elsize*nelem;
 124
 125         if (Pof_addr > MODEL_BUF_SIZE)
 126                 Int3();
 127
 128         return nelem;
 129 }
 130
 131 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 132 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 133
 134 short pof_read_short(ubyte *bufp)
 135 {
 136         short s;
 137
 138         s = *((short *) &bufp[Pof_addr]);
 139         Pof_addr += 2;
 140         return INTEL_SHORT(s);
 141 //      if (cfread(&s,sizeof(s),1,f) != 1)
 142 //              Error("Unexpected end-of-file while reading object");
 143 //
 144 //      return s;
 145 }
 146
 147 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 148 {
 149         int     i;
 150
 151         for (i=0; i<max_char; i++) {
 152                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 153                         break;
 154         }
 155
 156 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 157
 158 }
 159
 160 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 161 {
 162 //      cfread(vecs,sizeof(vms_vector),n,f);
 163
 164         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 165         Pof_addr += n*sizeof(*vecs);
 166
 167 #ifdef WORDS_BIGENDIAN
 168         while (n > 0)
 169                 vms_vector_swap(&vecs[--n]);
 170 #endif
 171
 172         if (Pof_addr > MODEL_BUF_SIZE)
 173                 Int3();
 174 }
 175
 176 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 177 {
 178         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 179         Pof_addr += n*sizeof(*angs);
 180
 181 #ifdef WORDS_BIGENDIAN
 182         while (n > 0)
 183                 vms_angvec_swap(&angs[--n]);
 184 #endif
 185
 186         if (Pof_addr > MODEL_BUF_SIZE)
 187                 Int3();
 188 }
 189
 190 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 191 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 192 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 193 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 194 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 195 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 196
 197 #ifdef DRIVE
 198 #define robot_info void
 199 #else
 200 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 201
 202 //set the animation angles for this robot.  Gun fields of robot info must
 203 //be filled in.
 204 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 205 #endif
 206
 207 #define DEBUG_LEVEL CON_NORMAL
 208
 209 #ifdef WORDS_NEED_ALIGNMENT
 210 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 211 {
 212         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 213 }
 214 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 215 {
 216         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 217 }
 218 /*
 219  * find chunk with smallest address
 220  */
 221 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 222 {
 223         int i, first_index = 0;
 224         Assert(no_chunks >= 1);
 225         for (i = 1; i < no_chunks; i++)
 226                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 227                         first_index = i;
 228         return first_index;
 229 }
 230 #define SHIFT_SPACE 500 // increase if insufficent
 231
 232 void align_polygon_model_data(polymodel *pm)
 233 {
 234         int i, chunk_len;
 235         int total_correction = 0;
 236         ubyte *cur_old, *cur_new;
 237         chunk cur_ch;
 238         chunk ch_list[MAX_CHUNKS];
 239         int no_chunks = 0;
 240         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 241         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 242
 243         Assert(tmp != NULL);
 244         //start with first chunk (is always aligned!)
 245         cur_old = pm->model_data;
 246         cur_new = tmp;
 247         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 248         memcpy(cur_new, cur_old, chunk_len);
 249         while (no_chunks > 0) {
 250                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 251                 cur_ch = ch_list[first_index];
 252                 // remove first chunk from array:
 253                 no_chunks--;
 254                 for (i = first_index; i < no_chunks; i++)
 255                         ch_list[i] = ch_list[i + 1];
 256                 // if (new) address unaligned:
 257                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 258                         // calculate how much to move to be aligned
 259                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 260                         // correct chunks' addresses
 261                         cur_ch.correction += to_shift;
 262                         for (i = 0; i < no_chunks; i++)
 263                                 ch_list[i].correction += to_shift;
 264                         total_correction += to_shift;
 265                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 266                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 267                 }
 268                 //write (corrected) chunk for current chunk:
 269                 *((short *)(cur_ch.new_base + cur_ch.offset))
 270                   = INTEL_SHORT(cur_ch.correction
 271                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 272                 //write (correctly aligned) chunk:
 273                 cur_old = old_dest(cur_ch);
 274                 cur_new = new_dest(cur_ch);
 275                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 276                 memcpy(cur_new, cur_old, chunk_len);
 277                 //correct submodel_ptr's for pm, too
 278                 for (i = 0; i < MAX_SUBMODELS; i++)
 279                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 280                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 281                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 282         }
 283         d_free(pm->model_data);
 284         pm->model_data_size += total_correction;
 285         pm->model_data = d_malloc(pm->model_data_size);
 286         Assert(pm->model_data != NULL);
 287         memcpy(pm->model_data, tmp, pm->model_data_size);
 288         d_free(tmp);
 289 }
 290 #endif //def WORDS_NEED_ALIGNMENT
 291
 292 //reads a binary file containing a 3d model
 293 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 294 {
 295         CFILE *ifile;
 296         short version;
 297         int id,len, next_chunk;
 298         int anim_flag = 0;
 299         ubyte *model_buf;
 300
 301         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 302         if (!model_buf)
 303                 Error("Can't allocate space to read model %s\n", filename);
 304
 305         if ((ifile=cfopen(filename,"rb"))==NULL)
 306                 Error("Can't open file <%s>",filename);
 307
 308         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 309
 310         Pof_addr = 0;
 311         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 312         cfclose(ifile);
 313
 314         id = pof_read_int(model_buf);
 315
 316         if (id!=0x4f505350) /* 'OPSP' */
 317                 Error("Bad ID in model file <%s>",filename);
 318
 319         version = pof_read_short(model_buf);
 320
 321         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 322                 Error("Bad version (%d) in model file <%s>",version,filename);
 323
 324         if ( FindArg( "-bspgen" ))
 325                 printf( "bspgen -c1" );
 326
 327         while (new_pof_read_int(id,model_buf) == 1) {
 328                 id = INTEL_INT(id);
 329                 //id  = pof_read_int(model_buf);
 330                 len = pof_read_int(model_buf);
 331                 next_chunk = Pof_addr + len;
 332
 333                 switch (id) {
 334
 335                         case ID_OHDR: {         //Object header
 336                                 vms_vector pmmin,pmmax;
 337
 338                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 339
 340                                 pm->n_models = pof_read_int(model_buf);
 341                                 pm->rad = pof_read_int(model_buf);
 342
 343                                 Assert(pm->n_models <= MAX_SUBMODELS);
 344
 345                                 pof_read_vecs(&pmmin,1,model_buf);
 346                                 pof_read_vecs(&pmmax,1,model_buf);
 347
 348                                 if ( FindArg( "-bspgen" ))      {
 349                                         vms_vector v;
 350                                         fix l;
 351
 352                                         vm_vec_sub(&v, &pmmax, &pmmin );
 353                                         l = v.x;
 354                                         if ( v.y > l ) l = v.y;
 355                                         if ( v.z > l ) l = v.z;
 356
 357                                         printf( " -l%.3f", f2fl(l) );
 358                                 }
 359
 360                                 break;
 361                         }
 362
 363                         case ID_SOBJ: {         //Subobject header
 364                                 int n;
 365
 366                                 anim_flag++;
 367
 368                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 369
 370                                 n = pof_read_short(model_buf);
 371
 372                                 Assert(n < MAX_SUBMODELS);
 373
 374                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 375
 376                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 377                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 378                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 379
 380                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 381
 382                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 383
 384                                 break;
 385
 386                         }
 387
 388                         #ifndef DRIVE
 389                         case ID_GUNS: {         //List of guns on this object
 390
 391                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 392
 393                                 if (r) {
 394                                         int i;
 395                                         vms_vector gun_dir;
 396                                         ubyte gun_used[MAX_GUNS];
 397
 398                                         r->n_guns = pof_read_int(model_buf);
 399
 400                                         if ( r->n_guns )
 401                                                 anim_flag++;
 402
 403                                         Assert(r->n_guns <= MAX_GUNS);
 404
 405                                         for (i=0;i<r->n_guns;i++)
 406                                                 gun_used[i] = 0;
 407
 408                                         for (i=0;i<r->n_guns;i++) {
 409                                                 int id;
 410
 411                                                 id = pof_read_short(model_buf);
 412                                                 Assert(id < r->n_guns);
 413                                                 Assert(gun_used[id] == 0);
 414                                                 gun_used[id] = 1;
 415                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 416                                                 Assert(r->gun_submodels[id] != 0xff);
 417                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 418
 419                                                 if (version >= 7)
 420                                                         pof_read_vecs(&gun_dir,1,model_buf);
 421                                         }
 422                                 }
 423                                 else
 424                                         pof_cfseek(model_buf,len,SEEK_CUR);
 425
 426                                 break;
 427                         }
 428
 429                         case ID_ANIM:           //Animation data
 430                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 431
 432                                 anim_flag++;
 433
 434                                 if (r) {
 435                                         int n_frames,f,m;
 436
 437                                         n_frames = pof_read_short(model_buf);
 438
 439                                         Assert(n_frames == N_ANIM_STATES);
 440
 441                                         for (m=0;m<pm->n_models;m++)
 442                                                 for (f=0;f<n_frames;f++)
 443                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 444
 445
 446                                         robot_set_angles(r,pm,anim_angs);
 447
 448                                 }
 449                                 else
 450                                         pof_cfseek(model_buf,len,SEEK_CUR);
 451
 452                                 break;
 453                         #endif
 454
 455                         case ID_TXTR: {         //Texture filename list
 456                                 int n;
 457                                 char name_buf[128];
 458
 459                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 460
 461                                 n = pof_read_short(model_buf);
 462                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 463                                 while (n--) {
 464                                         pof_read_string(name_buf,128,model_buf);
 465                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 466                                 }
 467
 468                                 break;
 469                         }
 470
 471                         case ID_IDTA:           //Interpreter data
 472                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 473
 474                                 pm->model_data = d_malloc(len);
 475                                 pm->model_data_size = len;
 476
 477                                 pof_cfread(pm->model_data,1,len,model_buf);
 478
 479                                 break;
 480
 481                         default:
 482                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 483                                 pof_cfseek(model_buf,len,SEEK_CUR);
 484                                 break;
 485
 486                 }
 487                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 488                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 489         }
 490
 491 //      for (i=0;i<pm->n_models;i++)
 492 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 493
 494         if ( FindArg( "-bspgen" )) {
 495                 char *p = strchr( filename, '.' );
 496                 *p = 0;
 497
 498                 if ( anim_flag > 1 )
 499                         printf( " -a" );
 500
 501                 printf( " %s.3ds\n", filename );
 502                 *p = '.';
 503         }
 504
 505         d_free(model_buf);
 506
 507 #ifdef WORDS_NEED_ALIGNMENT
 508         align_polygon_model_data(pm);
 509 #endif
 510 #ifdef WORDS_BIGENDIAN
 511         swap_polygon_model_data(pm->model_data);
 512 #endif
 513         //verify(pm->model_data);
 514
 515         return pm;
 516 }
 517
 518 //reads the gun information for a model
 519 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 520 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 521 {
 522         CFILE *ifile;
 523         short version;
 524         int id,len;
 525         int n_guns=0;
 526         ubyte   *model_buf;
 527
 528         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 529         if (!model_buf)
 530                 Error("Can't allocate space to read model %s\n", filename);
 531
 532         if ((ifile=cfopen(filename,"rb"))==NULL)
 533                 Error("Can't open file <%s>",filename);
 534
 535         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 536
 537         Pof_addr = 0;
 538         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 539         cfclose(ifile);
 540
 541         id = pof_read_int(model_buf);
 542
 543         if (id!=0x4f505350) /* 'OPSP' */
 544                 Error("Bad ID in model file <%s>",filename);
 545
 546         version = pof_read_short(model_buf);
 547
 548         Assert(version >= 7);           //must be 7 or higher for this data
 549
 550         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 551                 Error("Bad version (%d) in model file <%s>",version,filename);
 552
 553         while (new_pof_read_int(id,model_buf) == 1) {
 554                 id = INTEL_INT(id);
 555                 //id  = pof_read_int(model_buf);
 556                 len = pof_read_int(model_buf);
 557
 558                 if (id == ID_GUNS) {            //List of guns on this object
 559
 560                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 561
 562                         int i;
 563
 564                         n_guns = pof_read_int(model_buf);
 565
 566                         for (i=0;i<n_guns;i++) {
 567                                 int id,sm;
 568
 569                                 id = pof_read_short(model_buf);
 570                                 sm = pof_read_short(model_buf);
 571                                 if (gun_submodels)
 572                                         gun_submodels[id] = sm;
 573                                 else if (sm!=0)
 574                                         Error("Invalid gun submodel in file <%s>",filename);
 575                                 pof_read_vecs(&gun_points[id],1,model_buf);
 576
 577                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 578                         }
 579
 580                 }
 581                 else
 582                         pof_cfseek(model_buf,len,SEEK_CUR);
 583
 584         }
 585
 586         d_free(model_buf);
 587
 588         return n_guns;
 589 }
 590
 591 //free up a model, getting rid of all its memory
 592 void free_model(polymodel *po)
 593 {
 594         d_free(po->model_data);
 595 }
 596
 597 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 598 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 599
 600 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 601
 602
 603 //draw a polygon model
 604
 605 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[])
 606 {
 607         polymodel *po;
 608         int i;
 609         PA_DFX (int save_light);
 610
 611         Assert(model_num < N_polygon_models);
 612
 613         po=&Polygon_models[model_num];
 614
 615         //check if should use simple model
 616         if (po->simpler_model )                                 //must have a simpler model
 617                 if (flags==0)                                                   //can't switch if this is debris
 618                         //!!if (!alt_textures) {                                //alternate textures might not match
 619                         //alt textures might not match, but in the one case we're using this
 620                         //for on 11/14/94, they do match.  So we leave it in.
 621                         {
 622                                 int cnt=1;
 623                                 fix depth;
 624
 625                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 626
 627                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 628                                         po = &Polygon_models[po->simpler_model-1];
 629                         }
 630
 631         if (alt_textures)
 632    {
 633                 for (i=0;i<po->n_textures;i++)  {
 634                         texture_list_index[i] = alt_textures[i];
 635                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 636
 637          #ifdef _3DFX
 638          texture_list[i]->bm_handle = texture_list_index[i].index;
 639          #endif
 640                 }
 641    }
 642         else
 643    {
 644                 for (i=0;i<po->n_textures;i++)  {
 645                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 646                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 647
 648          #ifdef _3DFX
 649          texture_list[i]->bm_handle = texture_list_index[i].index;
 650          #endif
 651                 }
 652    }
 653
 654 #ifdef PIGGY_USE_PAGING
 655         // Make sure the textures for this object are paged in...
 656         piggy_page_flushed = 0;
 657         for (i=0;i<po->n_textures;i++)
 658                 PIGGY_PAGE_IN( texture_list_index[i] );
 659         // Hmmm... cache got flushed in the middle of paging all these in,
 660         // so we need to reread them all in.
 661         if (piggy_page_flushed) {
 662                 piggy_page_flushed = 0;
 663                 for (i=0;i<po->n_textures;i++)
 664                         PIGGY_PAGE_IN( texture_list_index[i] );
 665         }
 666         // Make sure that they can all fit in memory.
 667         Assert( piggy_page_flushed == 0 );
 668 #endif
 669
 670         g3_start_instance_matrix(pos,orient);
 671
 672         g3_set_interp_points(robot_points);
 673
 674 #ifdef _3DFX
 675    _3dfx_rendering_poly_obj = 1;
 676 #endif
 677         PA_DFX(save_light = Lighting_on);
 678         PA_DFX(Lighting_on = 0);
 679
 680         if (flags == 0)         //draw entire object
 681
 682                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 683
 684         else {
 685                 int i;
 686
 687                 for (i=0;flags;flags>>=1,i++)
 688                         if (flags & 1) {
 689                                 vms_vector ofs;
 690
 691                                 Assert(i < po->n_models);
 692
 693                                 //if submodel, rotate around its center point, not pivot point
 694
 695                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 696                                 vm_vec_negate(&ofs);
 697                                 g3_start_instance_matrix(&ofs,NULL);
 698
 699                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 700
 701                                 g3_done_instance();
 702                         }
 703         }
 704
 705         g3_done_instance();
 706
 707 #ifdef _3DFX
 708    _3dfx_rendering_poly_obj = 0;
 709 #endif
 710
 711         PA_DFX (Lighting_on = save_light);
 712
 713
 714 }
 715
 716 void free_polygon_models()
 717 {
 718         int i;
 719
 720         for (i=0;i<N_polygon_models;i++) {
 721                 free_model(&Polygon_models[i]);
 722         }
 723
 724 }
 725
 726 void polyobj_find_min_max(polymodel *pm)
 727 {
 728         ushort nverts;
 729         vms_vector *vp;
 730         ushort *data,type;
 731         int m;
 732         vms_vector *big_mn,*big_mx;
 733
 734         big_mn = &pm->mins;
 735         big_mx = &pm->maxs;
 736
 737         for (m=0;m<pm->n_models;m++) {
 738                 vms_vector *mn,*mx,*ofs;
 739
 740                 mn = &pm->submodel_mins[m];
 741                 mx = &pm->submodel_maxs[m];
 742                 ofs= &pm->submodel_offsets[m];
 743
 744                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 745
 746                 type = *data++;
 747
 748                 Assert(type == 7 || type == 1);
 749
 750                 nverts = *data++;
 751
 752                 if (type==7)
 753                         data+=2;                //skip start & pad
 754
 755                 vp = (vms_vector *) data;
 756
 757                 *mn = *mx = *vp++; nverts--;
 758
 759                 if (m==0)
 760                         *big_mn = *big_mx = *mn;
 761
 762                 while (nverts--) {
 763                         if (vp->x > mx->x) mx->x = vp->x;
 764                         if (vp->y > mx->y) mx->y = vp->y;
 765                         if (vp->z > mx->z) mx->z = vp->z;
 766
 767                         if (vp->x < mn->x) mn->x = vp->x;
 768                         if (vp->y < mn->y) mn->y = vp->y;
 769                         if (vp->z < mn->z) mn->z = vp->z;
 770
 771                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 772                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 773                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 774
 775                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 776                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 777                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 778
 779                         vp++;
 780                 }
 781
 782 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 783         }
 784
 785 //      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);
 786
 787 }
 788
 789 extern short highest_texture_num;       //from the 3d
 790
 791 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 792
 793 //returns the number of this model
 794 #ifndef DRIVE
 795 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 796 #else
 797 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 798 #endif
 799 {
 800         #ifdef DRIVE
 801         #define r NULL
 802         #endif
 803
 804         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 805         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 806
 807         //      MK was real tired of those useless, slow mprintfs...
 808         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 809                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 810
 811         Assert(strlen(filename) <= 12);
 812         strcpy(Pof_names[N_polygon_models],filename);
 813
 814         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 815
 816         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 817
 818         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 819
 820         if (highest_texture_num+1 != n_textures)
 821                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 822
 823         Polygon_models[N_polygon_models].n_textures = n_textures;
 824         Polygon_models[N_polygon_models].first_texture = first_texture;
 825         Polygon_models[N_polygon_models].simpler_model = 0;
 826
 827 //      Assert(polygon_models[N_polygon_models]!=NULL);
 828
 829         N_polygon_models++;
 830
 831         return N_polygon_models-1;
 832
 833 }
 834
 835
 836 void init_polygon_models()
 837 {
 838         N_polygon_models = 0;
 839
 840         atexit((void (*)())free_polygon_models);
 841
 842 }
 843
 844 //compare against this size when figuring how far to place eye for picture
 845 #define BASE_MODEL_SIZE 0x28000
 846
 847 #define DEFAULT_VIEW_DIST 0x60000
 848
 849 //draws the given model in the current canvas.  The distance is set to
 850 //more-or-less fill the canvas.  Note that this routine actually renders
 851 //into an off-screen canvas that it creates, then copies to the current
 852 //canvas.
 853 void draw_model_picture(int mn,vms_angvec *orient_angles)
 854 {
 855         vms_vector      temp_pos=ZERO_VECTOR;
 856         vms_matrix      temp_orient = IDENTITY_MATRIX;
 857 #ifndef OGL
 858         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 859 #endif
 860
 861         Assert(mn>=0 && mn<N_polygon_models);
 862
 863 #ifdef OGL
 864         ogl_start_offscreen_render(0, 0, grd_curcanv->cv_bitmap.bm_w, grd_curcanv->cv_bitmap.bm_h);
 865 #else
 866         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 867         gr_set_current_canvas(temp_canv);
 868 #endif
 869         gr_clear_canvas( BM_XRGB(0,0,0) );
 870
 871         g3_start_frame();
 872         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 873
 874         if (Polygon_models[mn].rad != 0)
 875                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 876         else
 877                 temp_pos.z = DEFAULT_VIEW_DIST;
 878
 879         vm_angles_2_matrix(&temp_orient, orient_angles);
 880
 881         PA_DFX(save_light = Lighting_on);
 882         PA_DFX(Lighting_on = 0);
 883         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 884         PA_DFX (Lighting_on = save_light);
 885
 886         g3_end_frame();
 887
 888 #ifdef OGL
 889         ogl_end_offscreen_render();
 890 #else
 891         gr_set_current_canvas(save_canv);
 892
 893         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 894
 895         gr_free_canvas(temp_canv);
 896 #endif
 897 }
 898
 899 #ifndef FAST_FILE_IO
 900 /*
 901  * reads a polymodel structure from a CFILE
 902  */
 903 extern void polymodel_read(polymodel *pm, CFILE *fp)
 904 {
 905         int i;
 906
 907         pm->n_models = cfile_read_int(fp);
 908         pm->model_data_size = cfile_read_int(fp);
 909         pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 910         for (i = 0; i < MAX_SUBMODELS; i++)
 911                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 912         for (i = 0; i < MAX_SUBMODELS; i++)
 913                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 914         for (i = 0; i < MAX_SUBMODELS; i++)
 915                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 916         for (i = 0; i < MAX_SUBMODELS; i++)
 917                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 918         for (i = 0; i < MAX_SUBMODELS; i++)
 919                 pm->submodel_rads[i] = cfile_read_fix(fp);
 920         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 921         for (i = 0; i < MAX_SUBMODELS; i++)
 922                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 923         for (i = 0; i < MAX_SUBMODELS; i++)
 924                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 925         cfile_read_vector(&(pm->mins), fp);
 926         cfile_read_vector(&(pm->maxs), fp);
 927         pm->rad = cfile_read_fix(fp);
 928         pm->n_textures = cfile_read_byte(fp);
 929         pm->first_texture = cfile_read_short(fp);
 930         pm->simpler_model = cfile_read_byte(fp);
 931 }
 932
 933 /*
 934  * reads n polymodel structs from a CFILE
 935  */
 936 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 937 {
 938         int i, j;
 939
 940         for (i = 0; i < n; i++) {
 941                 pm[i].n_models = cfile_read_int(fp);
 942                 pm[i].model_data_size = cfile_read_int(fp);
 943                 pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 944                 for (j = 0; j < MAX_SUBMODELS; j++)
 945                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 946                 for (j = 0; j < MAX_SUBMODELS; j++)
 947                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 948                 for (j = 0; j < MAX_SUBMODELS; j++)
 949                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 950                 for (j = 0; j < MAX_SUBMODELS; j++)
 951                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 952                 for (j = 0; j < MAX_SUBMODELS; j++)
 953                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 954                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 955                 for (j = 0; j < MAX_SUBMODELS; j++)
 956                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 957                 for (j = 0; j < MAX_SUBMODELS; j++)
 958                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 959                 cfile_read_vector(&(pm[i].mins), fp);
 960                 cfile_read_vector(&(pm[i].maxs), fp);
 961                 pm[i].rad = cfile_read_fix(fp);
 962                 pm[i].n_textures = cfile_read_byte(fp);
 963                 pm[i].first_texture = cfile_read_short(fp);
 964                 pm[i].simpler_model = cfile_read_byte(fp);
 965         }
 966         return i;
 967 }
 968 #endif
 969
 970
 971 /*
 972  * routine which allocates, reads, and inits a polymodel's model_data
 973  */
 974 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 975 {
 976         pm->model_data = d_malloc(pm->model_data_size);
 977         Assert(pm->model_data != NULL);
 978         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 979 #ifdef WORDS_NEED_ALIGNMENT
 980         align_polygon_model_data(pm);
 981 #endif
 982 #ifdef WORDS_BIGENDIAN
 983         swap_polygon_model_data(pm->model_data);
 984 #endif
 985         //verify(pm->model_data);
 986         g3_init_polygon_model(pm->model_data);
 987 }