main/polyobj.c

   1 /* $Id: polyobj.c,v 1.22 2005-07-30 07:46:03 chris Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Hacked-in polygon objects
  18  *
  19  */
  20
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #ifdef RCS
  27 static char rcsid[] = "$Id: polyobj.c,v 1.22 2005-07-30 07:46:03 chris Exp $";
  28 #endif
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 // -- I hate this warning in make depend! -- #ifdef DRIVE
  35 // -- I hate this warning in make depend! -- #include "drive.h"
  36 // -- I hate this warning in make depend! -- #else
  37 #include "inferno.h"
  38 // -- I hate this warning in make depend! -- #endif
  39
  40 #include "polyobj.h"
  41
  42 #include "vecmat.h"
  43 #include "interp.h"
  44 #include "error.h"
  45 #include "mono.h"
  46 #include "u_mem.h"
  47 #include "args.h"
  48 #include "byteswap.h"
  49
  50 #ifndef DRIVE
  51 #include "texmap.h"
  52 #include "bm.h"
  53 #include "textures.h"
  54 #include "object.h"
  55 #include "lighting.h"
  56 #include "cfile.h"
  57 #include "piggy.h"
  58 #endif
  59
  60 #ifdef OGL
  61 #include "ogl_init.h"
  62 #endif
  63
  64 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  65
  66 int D1_Polymodel_map[] = {
  67         0, 1, 2, 4, 5,
  68         6, 7, 8, 9, 10,
  69         11, 12, 13, 14, 15,
  70         16, 17, 18, 19, 20,
  71         21, 22, 23, 24, 25,
  72         26, 27, 28, 29, 30,
  73         31, 32, 33, 34, 35,
  74         36, 37, 38, 39, 93,
  75         94, -1, -1, 108, 109,
  76         110, 111, 112, 113, 114,
  77         115, 116, 117, 118, 119,
  78         120, 121, 122, 123, 124,
  79         125, 126, 127, 128, 129,
  80         130, 131, 132, 133, 134,
  81         135, 136, 137, 138, 139,
  82         140, 141, 142, -1, -1,
  83         -1, -1, -1, -1, -1,
  84 };
  85
  86 int D2Demo_Polymodel_map[] = {
  87         41, 42, 47, 48, 49,
  88         49, 51, 54, 56, 57,
  89         58, 59, 60, 61, 62,
  90         63, 65, 66, 74, 74,
  91         97, 98, 107, 108, 109,
  92         110, -1, -1, 111, 112,
  93         113, 114, 115, 116, 117,
  94         118, 119, 120, 121, 122,
  95         123, 124, 125, 126, 127,
  96         128, 129, 130, 133, 134,
  97         136, 137, 138, 139, 140,
  98         141, 143, 144, 145, 146,
  99         147, 148, 149, 150, 151,
 100         152, 155, 156, 157, 158,
 101         159, -1, -1, -1, -1,
 102         -1, -1, -1, -1, -1,
 103         -1, -1, -1, -1, -1,
 104 };
 105
 106 int N_polygon_models = 0;
 107
 108 #define MAX_POLYGON_VECS 1000
 109 g3s_point robot_points[MAX_POLYGON_VECS];
 110
 111 #define PM_COMPATIBLE_VERSION 6
 112 #define PM_OBJFILE_VERSION 8
 113
 114 int     Pof_file_end;
 115 int     Pof_addr;
 116
 117 #define MODEL_BUF_SIZE  32768
 118
 119 void _pof_cfseek(int len,int type)
 120 {
 121         switch (type) {
 122                 case SEEK_SET:  Pof_addr = len; break;
 123                 case SEEK_CUR:  Pof_addr += len;        break;
 124                 case SEEK_END:
 125                         Assert(len <= 0);       //      seeking from end, better be moving back.
 126                         Pof_addr = Pof_file_end + len;
 127                         break;
 128         }
 129
 130         if (Pof_addr > MODEL_BUF_SIZE)
 131                 Int3();
 132 }
 133
 134 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
 135
 136 int pof_read_int(ubyte *bufp)
 137 {
 138         int i;
 139
 140         i = *((int *) &bufp[Pof_addr]);
 141         Pof_addr += 4;
 142         return INTEL_INT(i);
 143
 144 //      if (cfread(&i,sizeof(i),1,f) != 1)
 145 //              Error("Unexpected end-of-file while reading object");
 146 //
 147 //      return i;
 148 }
 149
 150 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 151 {
 152         if (Pof_addr + nelem*elsize > Pof_file_end)
 153                 return 0;
 154
 155         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 156
 157         Pof_addr += elsize*nelem;
 158
 159         if (Pof_addr > MODEL_BUF_SIZE)
 160                 Int3();
 161
 162         return nelem;
 163 }
 164
 165 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 166 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 167
 168 short pof_read_short(ubyte *bufp)
 169 {
 170         short s;
 171
 172         s = *((short *) &bufp[Pof_addr]);
 173         Pof_addr += 2;
 174         return INTEL_SHORT(s);
 175 //      if (cfread(&s,sizeof(s),1,f) != 1)
 176 //              Error("Unexpected end-of-file while reading object");
 177 //
 178 //      return s;
 179 }
 180
 181 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 182 {
 183         int     i;
 184
 185         for (i=0; i<max_char; i++) {
 186                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 187                         break;
 188         }
 189
 190 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 191
 192 }
 193
 194 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 195 {
 196 //      cfread(vecs,sizeof(vms_vector),n,f);
 197
 198         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 199         Pof_addr += n*sizeof(*vecs);
 200
 201 #ifdef WORDS_BIGENDIAN
 202         while (n > 0)
 203                 vms_vector_swap(&vecs[--n]);
 204 #endif
 205
 206         if (Pof_addr > MODEL_BUF_SIZE)
 207                 Int3();
 208 }
 209
 210 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 211 {
 212         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 213         Pof_addr += n*sizeof(*angs);
 214
 215 #ifdef WORDS_BIGENDIAN
 216         while (n > 0)
 217                 vms_angvec_swap(&angs[--n]);
 218 #endif
 219
 220         if (Pof_addr > MODEL_BUF_SIZE)
 221                 Int3();
 222 }
 223
 224 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 225 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 226 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 227 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 228 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 229 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 230
 231 #ifdef DRIVE
 232 #define robot_info void
 233 #else
 234 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 235
 236 //set the animation angles for this robot.  Gun fields of robot info must
 237 //be filled in.
 238 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 239 #endif
 240
 241 #define DEBUG_LEVEL CON_NORMAL
 242
 243 #ifdef WORDS_NEED_ALIGNMENT
 244 ubyte * old_dest(chunk o) // return where chunk is (in unaligned struct)
 245 {
 246         return o.old_base + INTEL_SHORT(*((short *)(o.old_base + o.offset)));
 247 }
 248 ubyte * new_dest(chunk o) // return where chunk is (in aligned struct)
 249 {
 250         return o.new_base + INTEL_SHORT(*((short *)(o.old_base + o.offset))) + o.correction;
 251 }
 252 /*
 253  * find chunk with smallest address
 254  */
 255 int get_first_chunks_index(chunk *chunk_list, int no_chunks)
 256 {
 257         int i, first_index = 0;
 258         Assert(no_chunks >= 1);
 259         for (i = 1; i < no_chunks; i++)
 260                 if (old_dest(chunk_list[i]) < old_dest(chunk_list[first_index]))
 261                         first_index = i;
 262         return first_index;
 263 }
 264 #define SHIFT_SPACE 500 // increase if insufficent
 265
 266 void align_polygon_model_data(polymodel *pm)
 267 {
 268         int i, chunk_len;
 269         int total_correction = 0;
 270         ubyte *cur_old, *cur_new;
 271         chunk cur_ch;
 272         chunk ch_list[MAX_CHUNKS];
 273         int no_chunks = 0;
 274         int tmp_size = pm->model_data_size + SHIFT_SPACE;
 275         ubyte *tmp = d_malloc(tmp_size); // where we build the aligned version of pm->model_data
 276
 277         Assert(tmp != NULL);
 278         //start with first chunk (is always aligned!)
 279         cur_old = pm->model_data;
 280         cur_new = tmp;
 281         chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 282         memcpy(cur_new, cur_old, chunk_len);
 283         while (no_chunks > 0) {
 284                 int first_index = get_first_chunks_index(ch_list, no_chunks);
 285                 cur_ch = ch_list[first_index];
 286                 // remove first chunk from array:
 287                 no_chunks--;
 288                 for (i = first_index; i < no_chunks; i++)
 289                         ch_list[i] = ch_list[i + 1];
 290                 // if (new) address unaligned:
 291                 if ((u_int32_t)new_dest(cur_ch) % 4L != 0) {
 292                         // calculate how much to move to be aligned
 293                         short to_shift = 4 - (u_int32_t)new_dest(cur_ch) % 4L;
 294                         // correct chunks' addresses
 295                         cur_ch.correction += to_shift;
 296                         for (i = 0; i < no_chunks; i++)
 297                                 ch_list[i].correction += to_shift;
 298                         total_correction += to_shift;
 299                         Assert((u_int32_t)new_dest(cur_ch) % 4L == 0);
 300                         Assert(total_correction <= SHIFT_SPACE); // if you get this, increase SHIFT_SPACE
 301                 }
 302                 //write (corrected) chunk for current chunk:
 303                 *((short *)(cur_ch.new_base + cur_ch.offset))
 304                   = INTEL_SHORT(cur_ch.correction
 305                                 + INTEL_SHORT(*((short *)(cur_ch.old_base + cur_ch.offset))));
 306                 //write (correctly aligned) chunk:
 307                 cur_old = old_dest(cur_ch);
 308                 cur_new = new_dest(cur_ch);
 309                 chunk_len = get_chunks(cur_old, cur_new, ch_list, &no_chunks);
 310                 memcpy(cur_new, cur_old, chunk_len);
 311                 //correct submodel_ptr's for pm, too
 312                 for (i = 0; i < MAX_SUBMODELS; i++)
 313                         if (pm->model_data + pm->submodel_ptrs[i] >= cur_old
 314                             && pm->model_data + pm->submodel_ptrs[i] < cur_old + chunk_len)
 315                                 pm->submodel_ptrs[i] += (cur_new - tmp) - (cur_old - pm->model_data);
 316         }
 317         d_free(pm->model_data);
 318         pm->model_data_size += total_correction;
 319         pm->model_data = d_malloc(pm->model_data_size);
 320         Assert(pm->model_data != NULL);
 321         memcpy(pm->model_data, tmp, pm->model_data_size);
 322         d_free(tmp);
 323 }
 324 #endif //def WORDS_NEED_ALIGNMENT
 325
 326 //reads a binary file containing a 3d model
 327 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 328 {
 329         CFILE *ifile;
 330         short version;
 331         int id,len, next_chunk;
 332         int anim_flag = 0;
 333         ubyte *model_buf;
 334
 335         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 336         if (!model_buf)
 337                 Error("Can't allocate space to read model %s\n", filename);
 338
 339         if ((ifile=cfopen(filename,"rb"))==NULL)
 340                 Error("Can't open file <%s>",filename);
 341
 342         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 343
 344         Pof_addr = 0;
 345         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 346         cfclose(ifile);
 347
 348         id = pof_read_int(model_buf);
 349
 350         if (id!=0x4f505350) /* 'OPSP' */
 351                 Error("Bad ID in model file <%s>",filename);
 352
 353         version = pof_read_short(model_buf);
 354
 355         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 356                 Error("Bad version (%d) in model file <%s>",version,filename);
 357
 358         if ( FindArg( "-bspgen" ))
 359                 printf( "bspgen -c1" );
 360
 361         while (new_pof_read_int(id,model_buf) == 1) {
 362                 id = INTEL_INT(id);
 363                 //id  = pof_read_int(model_buf);
 364                 len = pof_read_int(model_buf);
 365                 next_chunk = Pof_addr + len;
 366
 367                 switch (id) {
 368
 369                         case ID_OHDR: {         //Object header
 370                                 vms_vector pmmin,pmmax;
 371
 372                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 373
 374                                 pm->n_models = pof_read_int(model_buf);
 375                                 pm->rad = pof_read_int(model_buf);
 376
 377                                 Assert(pm->n_models <= MAX_SUBMODELS);
 378
 379                                 pof_read_vecs(&pmmin,1,model_buf);
 380                                 pof_read_vecs(&pmmax,1,model_buf);
 381
 382                                 if ( FindArg( "-bspgen" ))      {
 383                                         vms_vector v;
 384                                         fix l;
 385
 386                                         vm_vec_sub(&v, &pmmax, &pmmin );
 387                                         l = v.x;
 388                                         if ( v.y > l ) l = v.y;
 389                                         if ( v.z > l ) l = v.z;
 390
 391                                         printf( " -l%.3f", f2fl(l) );
 392                                 }
 393
 394                                 break;
 395                         }
 396
 397                         case ID_SOBJ: {         //Subobject header
 398                                 int n;
 399
 400                                 anim_flag++;
 401
 402                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 403
 404                                 n = pof_read_short(model_buf);
 405
 406                                 Assert(n < MAX_SUBMODELS);
 407
 408                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 409
 410                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 411                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 412                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 413
 414                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 415
 416                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 417
 418                                 break;
 419
 420                         }
 421
 422                         #ifndef DRIVE
 423                         case ID_GUNS: {         //List of guns on this object
 424
 425                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 426
 427                                 if (r) {
 428                                         int i;
 429                                         vms_vector gun_dir;
 430                                         ubyte gun_used[MAX_GUNS];
 431
 432                                         r->n_guns = pof_read_int(model_buf);
 433
 434                                         if ( r->n_guns )
 435                                                 anim_flag++;
 436
 437                                         Assert(r->n_guns <= MAX_GUNS);
 438
 439                                         for (i=0;i<r->n_guns;i++)
 440                                                 gun_used[i] = 0;
 441
 442                                         for (i=0;i<r->n_guns;i++) {
 443                                                 int id;
 444
 445                                                 id = pof_read_short(model_buf);
 446                                                 Assert(id < r->n_guns);
 447                                                 Assert(gun_used[id] == 0);
 448                                                 gun_used[id] = 1;
 449                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 450                                                 Assert(r->gun_submodels[id] != 0xff);
 451                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 452
 453                                                 if (version >= 7)
 454                                                         pof_read_vecs(&gun_dir,1,model_buf);
 455                                         }
 456                                 }
 457                                 else
 458                                         pof_cfseek(model_buf,len,SEEK_CUR);
 459
 460                                 break;
 461                         }
 462
 463                         case ID_ANIM:           //Animation data
 464                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 465
 466                                 anim_flag++;
 467
 468                                 if (r) {
 469                                         int n_frames,f,m;
 470
 471                                         n_frames = pof_read_short(model_buf);
 472
 473                                         Assert(n_frames == N_ANIM_STATES);
 474
 475                                         for (m=0;m<pm->n_models;m++)
 476                                                 for (f=0;f<n_frames;f++)
 477                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 478
 479
 480                                         robot_set_angles(r,pm,anim_angs);
 481
 482                                 }
 483                                 else
 484                                         pof_cfseek(model_buf,len,SEEK_CUR);
 485
 486                                 break;
 487                         #endif
 488
 489                         case ID_TXTR: {         //Texture filename list
 490                                 int n;
 491                                 char name_buf[128];
 492
 493                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 494
 495                                 n = pof_read_short(model_buf);
 496                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 497                                 while (n--) {
 498                                         pof_read_string(name_buf,128,model_buf);
 499                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 500                                 }
 501
 502                                 break;
 503                         }
 504
 505                         case ID_IDTA:           //Interpreter data
 506                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 507
 508                                 pm->model_data = d_malloc(len);
 509                                 pm->model_data_size = len;
 510
 511                                 pof_cfread(pm->model_data,1,len,model_buf);
 512
 513                                 break;
 514
 515                         default:
 516                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 517                                 pof_cfseek(model_buf,len,SEEK_CUR);
 518                                 break;
 519
 520                 }
 521                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 522                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 523         }
 524
 525 //      for (i=0;i<pm->n_models;i++)
 526 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 527
 528         if ( FindArg( "-bspgen" )) {
 529                 char *p = strchr( filename, '.' );
 530                 *p = 0;
 531
 532                 if ( anim_flag > 1 )
 533                         printf( " -a" );
 534
 535                 printf( " %s.3ds\n", filename );
 536                 *p = '.';
 537         }
 538
 539         d_free(model_buf);
 540
 541 #ifdef WORDS_NEED_ALIGNMENT
 542         align_polygon_model_data(pm);
 543 #endif
 544 #ifdef WORDS_BIGENDIAN
 545         swap_polygon_model_data(pm->model_data);
 546 #endif
 547         //verify(pm->model_data);
 548
 549         return pm;
 550 }
 551
 552 //reads the gun information for a model
 553 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 554 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 555 {
 556         CFILE *ifile;
 557         short version;
 558         int id,len;
 559         int n_guns=0;
 560         ubyte   *model_buf;
 561
 562         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 563         if (!model_buf)
 564                 Error("Can't allocate space to read model %s\n", filename);
 565
 566         if ((ifile=cfopen(filename,"rb"))==NULL)
 567                 Error("Can't open file <%s>",filename);
 568
 569         Assert(cfilelength(ifile) <= MODEL_BUF_SIZE);
 570
 571         Pof_addr = 0;
 572         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 573         cfclose(ifile);
 574
 575         id = pof_read_int(model_buf);
 576
 577         if (id!=0x4f505350) /* 'OPSP' */
 578                 Error("Bad ID in model file <%s>",filename);
 579
 580         version = pof_read_short(model_buf);
 581
 582         Assert(version >= 7);           //must be 7 or higher for this data
 583
 584         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 585                 Error("Bad version (%d) in model file <%s>",version,filename);
 586
 587         while (new_pof_read_int(id,model_buf) == 1) {
 588                 id = INTEL_INT(id);
 589                 //id  = pof_read_int(model_buf);
 590                 len = pof_read_int(model_buf);
 591
 592                 if (id == ID_GUNS) {            //List of guns on this object
 593
 594                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 595
 596                         int i;
 597
 598                         n_guns = pof_read_int(model_buf);
 599
 600                         for (i=0;i<n_guns;i++) {
 601                                 int id,sm;
 602
 603                                 id = pof_read_short(model_buf);
 604                                 sm = pof_read_short(model_buf);
 605                                 if (gun_submodels)
 606                                         gun_submodels[id] = sm;
 607                                 else if (sm!=0)
 608                                         Error("Invalid gun submodel in file <%s>",filename);
 609                                 pof_read_vecs(&gun_points[id],1,model_buf);
 610
 611                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 612                         }
 613
 614                 }
 615                 else
 616                         pof_cfseek(model_buf,len,SEEK_CUR);
 617
 618         }
 619
 620         d_free(model_buf);
 621
 622         return n_guns;
 623 }
 624
 625 //free up a model, getting rid of all its memory
 626 void free_model(polymodel *po)
 627 {
 628         d_free(po->model_data);
 629 }
 630
 631 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 632 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 633
 634 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 635
 636
 637 //draw a polygon model
 638
 639 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[])
 640 {
 641         polymodel *po;
 642         int i;
 643
 644         Assert(model_num < N_polygon_models);
 645
 646         po=&Polygon_models[model_num];
 647
 648         //check if should use simple model
 649         if (po->simpler_model )                                 //must have a simpler model
 650                 if (flags==0)                                                   //can't switch if this is debris
 651                         //!!if (!alt_textures) {                                //alternate textures might not match
 652                         //alt textures might not match, but in the one case we're using this
 653                         //for on 11/14/94, they do match.  So we leave it in.
 654                         {
 655                                 int cnt=1;
 656                                 fix depth;
 657
 658                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 659
 660                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 661                                         po = &Polygon_models[po->simpler_model-1];
 662                         }
 663
 664         if (alt_textures)
 665    {
 666                 for (i=0;i<po->n_textures;i++)  {
 667                         texture_list_index[i] = alt_textures[i];
 668                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 669                 }
 670    }
 671         else
 672    {
 673                 for (i=0;i<po->n_textures;i++)  {
 674                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 675                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 676                 }
 677    }
 678
 679 #ifdef PIGGY_USE_PAGING
 680         // Make sure the textures for this object are paged in...
 681         piggy_page_flushed = 0;
 682         for (i=0;i<po->n_textures;i++)
 683                 PIGGY_PAGE_IN( texture_list_index[i] );
 684         // Hmmm... cache got flushed in the middle of paging all these in,
 685         // so we need to reread them all in.
 686         if (piggy_page_flushed) {
 687                 piggy_page_flushed = 0;
 688                 for (i=0;i<po->n_textures;i++)
 689                         PIGGY_PAGE_IN( texture_list_index[i] );
 690         }
 691         // Make sure that they can all fit in memory.
 692         Assert( piggy_page_flushed == 0 );
 693 #endif
 694
 695         g3_start_instance_matrix(pos,orient);
 696
 697         g3_set_interp_points(robot_points);
 698
 699         if (flags == 0)         //draw entire object
 700
 701                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 702
 703         else {
 704                 int i;
 705
 706                 for (i=0;flags;flags>>=1,i++)
 707                         if (flags & 1) {
 708                                 vms_vector ofs;
 709
 710                                 Assert(i < po->n_models);
 711
 712                                 //if submodel, rotate around its center point, not pivot point
 713
 714                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 715                                 vm_vec_negate(&ofs);
 716                                 g3_start_instance_matrix(&ofs,NULL);
 717
 718                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 719
 720                                 g3_done_instance();
 721                         }
 722         }
 723
 724         g3_done_instance();
 725 }
 726
 727 void free_polygon_models()
 728 {
 729         int i;
 730
 731         for (i=0;i<N_polygon_models;i++) {
 732                 free_model(&Polygon_models[i]);
 733         }
 734
 735 }
 736
 737 void polyobj_find_min_max(polymodel *pm)
 738 {
 739         ushort nverts;
 740         vms_vector *vp;
 741         ushort *data,type;
 742         int m;
 743         vms_vector *big_mn,*big_mx;
 744
 745         big_mn = &pm->mins;
 746         big_mx = &pm->maxs;
 747
 748         for (m=0;m<pm->n_models;m++) {
 749                 vms_vector *mn,*mx,*ofs;
 750
 751                 mn = &pm->submodel_mins[m];
 752                 mx = &pm->submodel_maxs[m];
 753                 ofs= &pm->submodel_offsets[m];
 754
 755                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 756
 757                 type = *data++;
 758
 759                 Assert(type == 7 || type == 1);
 760
 761                 nverts = *data++;
 762
 763                 if (type==7)
 764                         data+=2;                //skip start & pad
 765
 766                 vp = (vms_vector *) data;
 767
 768                 *mn = *mx = *vp++; nverts--;
 769
 770                 if (m==0)
 771                         *big_mn = *big_mx = *mn;
 772
 773                 while (nverts--) {
 774                         if (vp->x > mx->x) mx->x = vp->x;
 775                         if (vp->y > mx->y) mx->y = vp->y;
 776                         if (vp->z > mx->z) mx->z = vp->z;
 777
 778                         if (vp->x < mn->x) mn->x = vp->x;
 779                         if (vp->y < mn->y) mn->y = vp->y;
 780                         if (vp->z < mn->z) mn->z = vp->z;
 781
 782                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 783                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 784                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 785
 786                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 787                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 788                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 789
 790                         vp++;
 791                 }
 792
 793 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 794         }
 795
 796 //      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);
 797
 798 }
 799
 800 extern short highest_texture_num;       //from the 3d
 801
 802 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 803
 804 //returns the number of this model
 805 #ifndef DRIVE
 806 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 807 #else
 808 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 809 #endif
 810 {
 811         #ifdef DRIVE
 812         #define r NULL
 813         #endif
 814
 815         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 816         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 817
 818         //      MK was real tired of those useless, slow mprintfs...
 819         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 820                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 821
 822         Assert(strlen(filename) <= 12);
 823         strcpy(Pof_names[N_polygon_models],filename);
 824
 825         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 826
 827         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 828
 829         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 830
 831         if (highest_texture_num+1 != n_textures)
 832                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 833
 834         Polygon_models[N_polygon_models].n_textures = n_textures;
 835         Polygon_models[N_polygon_models].first_texture = first_texture;
 836         Polygon_models[N_polygon_models].simpler_model = 0;
 837
 838 //      Assert(polygon_models[N_polygon_models]!=NULL);
 839
 840         N_polygon_models++;
 841
 842         return N_polygon_models-1;
 843
 844 }
 845
 846
 847 void init_polygon_models()
 848 {
 849         N_polygon_models = 0;
 850
 851         atexit((void (*)())free_polygon_models);
 852
 853 }
 854
 855 //compare against this size when figuring how far to place eye for picture
 856 #define BASE_MODEL_SIZE 0x28000
 857
 858 #define DEFAULT_VIEW_DIST 0x60000
 859
 860 //draws the given model in the current canvas.  The distance is set to
 861 //more-or-less fill the canvas.  Note that this routine actually renders
 862 //into an off-screen canvas that it creates, then copies to the current
 863 //canvas.
 864 void draw_model_picture(int mn,vms_angvec *orient_angles)
 865 {
 866         vms_vector      temp_pos=ZERO_VECTOR;
 867         vms_matrix      temp_orient = IDENTITY_MATRIX;
 868 #ifndef OGL
 869         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 870 #endif
 871
 872         Assert(mn>=0 && mn<N_polygon_models);
 873
 874 #ifdef OGL
 875         ogl_start_offscreen_render(0, 0, grd_curcanv->cv_bitmap.bm_w, grd_curcanv->cv_bitmap.bm_h);
 876 #else
 877         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 878         gr_set_current_canvas(temp_canv);
 879 #endif
 880         gr_clear_canvas( BM_XRGB(0,0,0) );
 881
 882         g3_start_frame();
 883         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 884
 885         if (Polygon_models[mn].rad != 0)
 886                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 887         else
 888                 temp_pos.z = DEFAULT_VIEW_DIST;
 889
 890         vm_angles_2_matrix(&temp_orient, orient_angles);
 891
 892         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 893
 894         g3_end_frame();
 895
 896 #ifdef OGL
 897         ogl_end_offscreen_render();
 898 #else
 899         gr_set_current_canvas(save_canv);
 900
 901         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 902
 903         gr_free_canvas(temp_canv);
 904 #endif
 905 }
 906
 907 #ifndef FAST_FILE_IO
 908 /*
 909  * reads a polymodel structure from a CFILE
 910  */
 911 extern void polymodel_read(polymodel *pm, CFILE *fp)
 912 {
 913         int i;
 914
 915         pm->n_models = cfile_read_int(fp);
 916         pm->model_data_size = cfile_read_int(fp);
 917         pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 918         for (i = 0; i < MAX_SUBMODELS; i++)
 919                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 920         for (i = 0; i < MAX_SUBMODELS; i++)
 921                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 922         for (i = 0; i < MAX_SUBMODELS; i++)
 923                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 924         for (i = 0; i < MAX_SUBMODELS; i++)
 925                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 926         for (i = 0; i < MAX_SUBMODELS; i++)
 927                 pm->submodel_rads[i] = cfile_read_fix(fp);
 928         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 929         for (i = 0; i < MAX_SUBMODELS; i++)
 930                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 931         for (i = 0; i < MAX_SUBMODELS; i++)
 932                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 933         cfile_read_vector(&(pm->mins), fp);
 934         cfile_read_vector(&(pm->maxs), fp);
 935         pm->rad = cfile_read_fix(fp);
 936         pm->n_textures = cfile_read_byte(fp);
 937         pm->first_texture = cfile_read_short(fp);
 938         pm->simpler_model = cfile_read_byte(fp);
 939 }
 940
 941 /*
 942  * reads n polymodel structs from a CFILE
 943  */
 944 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 945 {
 946         int i, j;
 947
 948         for (i = 0; i < n; i++) {
 949                 pm[i].n_models = cfile_read_int(fp);
 950                 pm[i].model_data_size = cfile_read_int(fp);
 951                 pm->model_data = (ubyte *)cfile_read_int(fp); // garbage, read it anyway just for consistency
 952                 for (j = 0; j < MAX_SUBMODELS; j++)
 953                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 954                 for (j = 0; j < MAX_SUBMODELS; j++)
 955                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 956                 for (j = 0; j < MAX_SUBMODELS; j++)
 957                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 958                 for (j = 0; j < MAX_SUBMODELS; j++)
 959                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 960                 for (j = 0; j < MAX_SUBMODELS; j++)
 961                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 962                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 963                 for (j = 0; j < MAX_SUBMODELS; j++)
 964                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 965                 for (j = 0; j < MAX_SUBMODELS; j++)
 966                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 967                 cfile_read_vector(&(pm[i].mins), fp);
 968                 cfile_read_vector(&(pm[i].maxs), fp);
 969                 pm[i].rad = cfile_read_fix(fp);
 970                 pm[i].n_textures = cfile_read_byte(fp);
 971                 pm[i].first_texture = cfile_read_short(fp);
 972                 pm[i].simpler_model = cfile_read_byte(fp);
 973         }
 974         return i;
 975 }
 976 #endif
 977
 978
 979 /*
 980  * routine which allocates, reads, and inits a polymodel's model_data
 981  */
 982 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 983 {
 984         pm->model_data = d_malloc(pm->model_data_size);
 985         Assert(pm->model_data != NULL);
 986         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 987 #ifdef WORDS_NEED_ALIGNMENT
 988         align_polygon_model_data(pm);
 989 #endif
 990 #ifdef WORDS_BIGENDIAN
 991         swap_polygon_model_data(pm->model_data);
 992 #endif
 993         //verify(pm->model_data);
 994         g3_init_polygon_model(pm->model_data);
 995 }