main/polyobj.c

   1 /* $Id: polyobj.c,v 1.10 2003-01-03 00:56:33 btb Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 #ifdef HAVE_CONFIG_H
  16 #include <conf.h>
  17 #endif
  18
  19 #ifdef RCS
  20 static char rcsid[] = "$Id: polyobj.c,v 1.10 2003-01-03 00:56:33 btb Exp $";
  21 #endif
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 // -- I hate this warning in make depend! -- #ifdef DRIVE
  28 // -- I hate this warning in make depend! -- #include "drive.h"
  29 // -- I hate this warning in make depend! -- #else
  30 #include "inferno.h"
  31 // -- I hate this warning in make depend! -- #endif
  32
  33 #include "polyobj.h"
  34
  35 #include "vecmat.h"
  36 #include "interp.h"
  37 #include "error.h"
  38 #include "mono.h"
  39 #include "u_mem.h"
  40 #include "args.h"
  41 #include "byteswap.h"
  42
  43 #ifndef DRIVE
  44 #include "texmap.h"
  45 #include "bm.h"
  46 #include "textures.h"
  47 #include "object.h"
  48 #include "lighting.h"
  49 #include "cfile.h"
  50 #include "piggy.h"
  51 #endif
  52
  53 #include "pa_enabl.h"
  54
  55 #ifdef _3DFX
  56 #include "3dfx_des.h"
  57 #endif
  58
  59 polymodel Polygon_models[MAX_POLYGON_MODELS];   // = {&bot11,&bot17,&robot_s2,&robot_b2,&bot11,&bot17,&robot_s2,&robot_b2};
  60
  61 int N_polygon_models = 0;
  62
  63 #define MAX_POLYGON_VECS 1000
  64 g3s_point robot_points[MAX_POLYGON_VECS];
  65
  66 #define PM_COMPATIBLE_VERSION 6
  67 #define PM_OBJFILE_VERSION 8
  68
  69 int     Pof_file_end;
  70 int     Pof_addr;
  71
  72 #define MODEL_BUF_SIZE  32768
  73
  74 #ifdef WORDS_BIGENDIAN
  75 void short_swap(short *s)
  76 {
  77         *s = SWAPSHORT(*s);
  78 }
  79
  80 void fix_swap(fix *f)
  81 {
  82         *f = (fix)SWAPINT((int)*f);
  83 }
  84
  85 void fixang_swap(fixang *f)
  86 {
  87         *f = (fixang)SWAPSHORT((short)*f);
  88 }
  89
  90 void vms_vector_swap(vms_vector *v)
  91 {
  92         fix_swap(&v->x);
  93         fix_swap(&v->y);
  94         fix_swap(&v->z);
  95 }
  96
  97 void vms_angvec_swap(vms_angvec *v)
  98 {
  99         fixang_swap(&v->p);
 100         fixang_swap(&v->b);
 101         fixang_swap(&v->h);
 102 }
 103 #endif
 104
 105 void _pof_cfseek(int len,int type)
 106 {
 107         switch (type) {
 108                 case SEEK_SET:  Pof_addr = len; break;
 109                 case SEEK_CUR:  Pof_addr += len;        break;
 110                 case SEEK_END:
 111                         Assert(len <= 0);       //      seeking from end, better be moving back.
 112                         Pof_addr = Pof_file_end + len;
 113                         break;
 114         }
 115
 116         if (Pof_addr > MODEL_BUF_SIZE)
 117                 Int3();
 118 }
 119
 120 #define pof_cfseek(_buf,_len,_type) _pof_cfseek((_len),(_type))
 121
 122 int pof_read_int(ubyte *bufp)
 123 {
 124         int i;
 125
 126         i = *((int *) &bufp[Pof_addr]);
 127         Pof_addr += 4;
 128         return INTEL_INT(i);
 129
 130 //      if (cfread(&i,sizeof(i),1,f) != 1)
 131 //              Error("Unexpected end-of-file while reading object");
 132 //
 133 //      return i;
 134 }
 135
 136 size_t pof_cfread(void *dst, size_t elsize, size_t nelem, ubyte *bufp)
 137 {
 138         if (Pof_addr + nelem*elsize > Pof_file_end)
 139                 return 0;
 140
 141         memcpy(dst, &bufp[Pof_addr], elsize*nelem);
 142
 143         Pof_addr += elsize*nelem;
 144
 145         if (Pof_addr > MODEL_BUF_SIZE)
 146                 Int3();
 147
 148         return nelem;
 149 }
 150
 151 // #define new_read_int(i,f) cfread(&(i),sizeof(i),1,(f))
 152 #define new_pof_read_int(i,f) pof_cfread(&(i),sizeof(i),1,(f))
 153
 154 short pof_read_short(ubyte *bufp)
 155 {
 156         short s;
 157
 158         s = *((short *) &bufp[Pof_addr]);
 159         Pof_addr += 2;
 160         return INTEL_SHORT(s);
 161 //      if (cfread(&s,sizeof(s),1,f) != 1)
 162 //              Error("Unexpected end-of-file while reading object");
 163 //
 164 //      return s;
 165 }
 166
 167 void pof_read_string(char *buf,int max_char, ubyte *bufp)
 168 {
 169         int     i;
 170
 171         for (i=0; i<max_char; i++) {
 172                 if ((*buf++ = bufp[Pof_addr++]) == 0)
 173                         break;
 174         }
 175
 176 //      while (max_char-- && (*buf=cfgetc(f)) != 0) buf++;
 177
 178 }
 179
 180 void pof_read_vecs(vms_vector *vecs,int n,ubyte *bufp)
 181 {
 182 //      cfread(vecs,sizeof(vms_vector),n,f);
 183
 184         memcpy(vecs, &bufp[Pof_addr], n*sizeof(*vecs));
 185         Pof_addr += n*sizeof(*vecs);
 186
 187 #ifdef WORDS_BIGENDIAN
 188         while (n > 0)
 189                 vms_vector_swap(&vecs[--n]);
 190 #endif
 191
 192         if (Pof_addr > MODEL_BUF_SIZE)
 193                 Int3();
 194 }
 195
 196 void pof_read_angs(vms_angvec *angs,int n,ubyte *bufp)
 197 {
 198         memcpy(angs, &bufp[Pof_addr], n*sizeof(*angs));
 199         Pof_addr += n*sizeof(*angs);
 200
 201 #ifdef WORDS_BIGENDIAN
 202         while (n > 0)
 203                 vms_angvec_swap(&angs[--n]);
 204 #endif
 205
 206         if (Pof_addr > MODEL_BUF_SIZE)
 207                 Int3();
 208 }
 209
 210 #define ID_OHDR 0x5244484f // 'RDHO'  //Object header
 211 #define ID_SOBJ 0x4a424f53 // 'JBOS'  //Subobject header
 212 #define ID_GUNS 0x534e5547 // 'SNUG'  //List of guns on this object
 213 #define ID_ANIM 0x4d494e41 // 'MINA'  //Animation data
 214 #define ID_IDTA 0x41544449 // 'ATDI'  //Interpreter data
 215 #define ID_TXTR 0x52545854 // 'RTXT'  //Texture filename list
 216
 217 #ifdef DRIVE
 218 #define robot_info void
 219 #else
 220 vms_angvec anim_angs[N_ANIM_STATES][MAX_SUBMODELS];
 221
 222 //set the animation angles for this robot.  Gun fields of robot info must
 223 //be filled in.
 224 void robot_set_angles(robot_info *r,polymodel *pm,vms_angvec angs[N_ANIM_STATES][MAX_SUBMODELS]);
 225 #endif
 226
 227 #define DEBUG_LEVEL CON_NORMAL
 228
 229 //reads a binary file containing a 3d model
 230 polymodel *read_model_file(polymodel *pm,char *filename,robot_info *r)
 231 {
 232         CFILE *ifile;
 233         short version;
 234         int id,len, next_chunk;
 235         int anim_flag = 0;
 236         ubyte *model_buf;
 237
 238         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 239         if (!model_buf)
 240                 Error("Can't allocate space to read model %s\n", filename);
 241
 242         if ((ifile=cfopen(filename,"rb"))==NULL)
 243                 Error("Can't open file <%s>",filename);
 244
 245         Assert(ifile->size <= MODEL_BUF_SIZE);
 246
 247         Pof_addr = 0;
 248         Pof_file_end = cfread(model_buf, 1, cfilelength(ifile), ifile);
 249         cfclose(ifile);
 250
 251         id = pof_read_int(model_buf);
 252
 253         if (id!=0x4f505350) /* 'OPSP' */
 254                 Error("Bad ID in model file <%s>",filename);
 255
 256         version = pof_read_short(model_buf);
 257
 258         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 259                 Error("Bad version (%d) in model file <%s>",version,filename);
 260
 261         if ( FindArg( "-bspgen" ))
 262                 printf( "bspgen -c1" );
 263
 264         while (new_pof_read_int(id,model_buf) == 1) {
 265                 id = INTEL_INT(id);
 266                 //id  = pof_read_int(model_buf);
 267                 len = pof_read_int(model_buf);
 268                 next_chunk = Pof_addr + len;
 269
 270                 switch (id) {
 271
 272                         case ID_OHDR: {         //Object header
 273                                 vms_vector pmmin,pmmax;
 274
 275                                 //con_printf(DEBUG_LEVEL, "Got chunk OHDR, len=%d\n",len);
 276
 277                                 pm->n_models = pof_read_int(model_buf);
 278                                 pm->rad = pof_read_int(model_buf);
 279
 280                                 Assert(pm->n_models <= MAX_SUBMODELS);
 281
 282                                 pof_read_vecs(&pmmin,1,model_buf);
 283                                 pof_read_vecs(&pmmax,1,model_buf);
 284
 285                                 if ( FindArg( "-bspgen" ))      {
 286                                         vms_vector v;
 287                                         fix l;
 288
 289                                         vm_vec_sub(&v, &pmmax, &pmmin );
 290                                         l = v.x;
 291                                         if ( v.y > l ) l = v.y;
 292                                         if ( v.z > l ) l = v.z;
 293
 294                                         printf( " -l%.3f", f2fl(l) );
 295                                 }
 296
 297                                 break;
 298                         }
 299
 300                         case ID_SOBJ: {         //Subobject header
 301                                 int n;
 302
 303                                 anim_flag++;
 304
 305                                 //con_printf(DEBUG_LEVEL, "Got chunk SOBJ, len=%d\n",len);
 306
 307                                 n = pof_read_short(model_buf);
 308
 309                                 Assert(n < MAX_SUBMODELS);
 310
 311                                 pm->submodel_parents[n] = pof_read_short(model_buf);
 312
 313                                 pof_read_vecs(&pm->submodel_norms[n],1,model_buf);
 314                                 pof_read_vecs(&pm->submodel_pnts[n],1,model_buf);
 315                                 pof_read_vecs(&pm->submodel_offsets[n],1,model_buf);
 316
 317                                 pm->submodel_rads[n] = pof_read_int(model_buf);         //radius
 318
 319                                 pm->submodel_ptrs[n] = pof_read_int(model_buf); //offset
 320
 321                                 break;
 322
 323                         }
 324
 325                         #ifndef DRIVE
 326                         case ID_GUNS: {         //List of guns on this object
 327
 328                                 //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 329
 330                                 if (r) {
 331                                         int i;
 332                                         vms_vector gun_dir;
 333                                         ubyte gun_used[MAX_GUNS];
 334
 335                                         r->n_guns = pof_read_int(model_buf);
 336
 337                                         if ( r->n_guns )
 338                                                 anim_flag++;
 339
 340                                         Assert(r->n_guns <= MAX_GUNS);
 341
 342                                         for (i=0;i<r->n_guns;i++)
 343                                                 gun_used[i] = 0;
 344
 345                                         for (i=0;i<r->n_guns;i++) {
 346                                                 int id;
 347
 348                                                 id = pof_read_short(model_buf);
 349                                                 Assert(id < r->n_guns);
 350                                                 Assert(gun_used[id] == 0);
 351                                                 gun_used[id] = 1;
 352                                                 r->gun_submodels[id] = pof_read_short(model_buf);
 353                                                 Assert(r->gun_submodels[id] != 0xff);
 354                                                 pof_read_vecs(&r->gun_points[id],1,model_buf);
 355
 356                                                 if (version >= 7)
 357                                                         pof_read_vecs(&gun_dir,1,model_buf);
 358                                         }
 359                                 }
 360                                 else
 361                                         pof_cfseek(model_buf,len,SEEK_CUR);
 362
 363                                 break;
 364                         }
 365
 366                         case ID_ANIM:           //Animation data
 367                                 //con_printf(DEBUG_LEVEL, "Got chunk ANIM, len=%d\n",len);
 368
 369                                 anim_flag++;
 370
 371                                 if (r) {
 372                                         int n_frames,f,m;
 373
 374                                         n_frames = pof_read_short(model_buf);
 375
 376                                         Assert(n_frames == N_ANIM_STATES);
 377
 378                                         for (m=0;m<pm->n_models;m++)
 379                                                 for (f=0;f<n_frames;f++)
 380                                                         pof_read_angs(&anim_angs[f][m], 1, model_buf);
 381
 382
 383                                         robot_set_angles(r,pm,anim_angs);
 384
 385                                 }
 386                                 else
 387                                         pof_cfseek(model_buf,len,SEEK_CUR);
 388
 389                                 break;
 390                         #endif
 391
 392                         case ID_TXTR: {         //Texture filename list
 393                                 int n;
 394                                 char name_buf[128];
 395
 396                                 //con_printf(DEBUG_LEVEL, "Got chunk TXTR, len=%d\n",len);
 397
 398                                 n = pof_read_short(model_buf);
 399                                 //con_printf(DEBUG_LEVEL, "  num textures = %d\n",n);
 400                                 while (n--) {
 401                                         pof_read_string(name_buf,128,model_buf);
 402                                         //con_printf(DEBUG_LEVEL, "<%s>\n",name_buf);
 403                                 }
 404
 405                                 break;
 406                         }
 407
 408                         case ID_IDTA:           //Interpreter data
 409                                 //con_printf(DEBUG_LEVEL, "Got chunk IDTA, len=%d\n",len);
 410
 411                                 pm->model_data = d_malloc(len);
 412                                 pm->model_data_size = len;
 413
 414                                 pof_cfread(pm->model_data,1,len,model_buf);
 415
 416                                 break;
 417
 418                         default:
 419                                 //con_printf(DEBUG_LEVEL, "Unknown chunk <%c%c%c%c>, len = %d\n",id,id>>8,id>>16,id>>24,len);
 420                                 pof_cfseek(model_buf,len,SEEK_CUR);
 421                                 break;
 422
 423                 }
 424                 if ( version >= 8 )             // Version 8 needs 4-byte alignment!!!
 425                         pof_cfseek(model_buf,next_chunk,SEEK_SET);
 426         }
 427
 428 //      for (i=0;i<pm->n_models;i++)
 429 //              pm->submodel_ptrs[i] += (int) pm->model_data;
 430
 431         if ( FindArg( "-bspgen" )) {
 432                 char *p = strchr( filename, '.' );
 433                 *p = 0;
 434
 435                 if ( anim_flag > 1 )
 436                         printf( " -a" );
 437
 438                 printf( " %s.3ds\n", filename );
 439                 *p = '.';
 440         }
 441
 442         d_free(model_buf);
 443
 444 #ifdef WORDS_NEED_ALIGNMENT
 445         align_polygon_model_data(pm);
 446 #endif
 447 #ifdef WORDS_BIGENDIAN
 448         swap_polygon_model_data(pm->model_data);
 449 #endif
 450         //verify(pm->model_data);
 451
 452         return pm;
 453 }
 454
 455 //reads the gun information for a model
 456 //fills in arrays gun_points & gun_dirs, returns the number of guns read
 457 int read_model_guns(char *filename,vms_vector *gun_points, vms_vector *gun_dirs, int *gun_submodels)
 458 {
 459         CFILE *ifile;
 460         short version;
 461         int id,len;
 462         int n_guns=0;
 463         ubyte   *model_buf;
 464
 465         model_buf = (ubyte *)d_malloc( MODEL_BUF_SIZE * sizeof(ubyte) );
 466         if (!model_buf)
 467                 Error("Can't allocate space to read model %s\n", filename);
 468
 469         if ((ifile=cfopen(filename,"rb"))==NULL)
 470                 Error("Can't open file <%s>",filename);
 471
 472         Assert(ifile->size <= MODEL_BUF_SIZE);
 473
 474         Pof_addr = 0;
 475         Pof_file_end = cfread(model_buf, 1, ifile->size, ifile);
 476         cfclose(ifile);
 477
 478         id = pof_read_int(model_buf);
 479
 480         if (id!=0x4f505350) /* 'OPSP' */
 481                 Error("Bad ID in model file <%s>",filename);
 482
 483         version = pof_read_short(model_buf);
 484
 485         Assert(version >= 7);           //must be 7 or higher for this data
 486
 487         if (version < PM_COMPATIBLE_VERSION || version > PM_OBJFILE_VERSION)
 488                 Error("Bad version (%d) in model file <%s>",version,filename);
 489
 490         while (new_pof_read_int(id,model_buf) == 1) {
 491                 id = INTEL_INT(id);
 492                 //id  = pof_read_int(model_buf);
 493                 len = pof_read_int(model_buf);
 494
 495                 if (id == ID_GUNS) {            //List of guns on this object
 496
 497                         //con_printf(DEBUG_LEVEL, "Got chunk GUNS, len=%d\n",len);
 498
 499                         int i;
 500
 501                         n_guns = pof_read_int(model_buf);
 502
 503                         for (i=0;i<n_guns;i++) {
 504                                 int id,sm;
 505
 506                                 id = pof_read_short(model_buf);
 507                                 sm = pof_read_short(model_buf);
 508                                 if (gun_submodels)
 509                                         gun_submodels[id] = sm;
 510                                 else if (sm!=0)
 511                                         Error("Invalid gun submodel in file <%s>",filename);
 512                                 pof_read_vecs(&gun_points[id],1,model_buf);
 513
 514                                 pof_read_vecs(&gun_dirs[id],1,model_buf);
 515                         }
 516
 517                 }
 518                 else
 519                         pof_cfseek(model_buf,len,SEEK_CUR);
 520
 521         }
 522
 523         d_free(model_buf);
 524
 525         return n_guns;
 526 }
 527
 528 //free up a model, getting rid of all its memory
 529 void free_model(polymodel *po)
 530 {
 531         d_free(po->model_data);
 532 }
 533
 534 grs_bitmap *texture_list[MAX_POLYOBJ_TEXTURES];
 535 bitmap_index texture_list_index[MAX_POLYOBJ_TEXTURES];
 536
 537 int Simple_model_threshhold_scale=5;            //switch when this times radius far away
 538
 539
 540 //draw a polygon model
 541
 542 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[])
 543 {
 544         polymodel *po;
 545         int i;
 546         PA_DFX (int save_light);
 547
 548         Assert(model_num < N_polygon_models);
 549
 550         po=&Polygon_models[model_num];
 551
 552         //check if should use simple model
 553         if (po->simpler_model )                                 //must have a simpler model
 554                 if (flags==0)                                                   //can't switch if this is debris
 555                         //!!if (!alt_textures) {                                //alternate textures might not match
 556                         //alt textures might not match, but in the one case we're using this
 557                         //for on 11/14/94, they do match.  So we leave it in.
 558                         {
 559                                 int cnt=1;
 560                                 fix depth;
 561
 562                                 depth = g3_calc_point_depth(pos);               //gets 3d depth
 563
 564                                 while (po->simpler_model && depth > cnt++ * Simple_model_threshhold_scale * po->rad)
 565                                         po = &Polygon_models[po->simpler_model-1];
 566                         }
 567
 568         if (alt_textures)
 569    {
 570                 for (i=0;i<po->n_textures;i++)  {
 571                         texture_list_index[i] = alt_textures[i];
 572                         texture_list[i] = &GameBitmaps[alt_textures[i].index];
 573
 574          #ifdef _3DFX
 575          texture_list[i]->bm_handle = texture_list_index[i].index;
 576          #endif
 577                 }
 578    }
 579         else
 580    {
 581                 for (i=0;i<po->n_textures;i++)  {
 582                         texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 583                         texture_list[i] = &GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index];
 584
 585          #ifdef _3DFX
 586          texture_list[i]->bm_handle = texture_list_index[i].index;
 587          #endif
 588                 }
 589    }
 590
 591 #ifdef PIGGY_USE_PAGING
 592         // Make sure the textures for this object are paged in...
 593         piggy_page_flushed = 0;
 594         for (i=0;i<po->n_textures;i++)
 595                 PIGGY_PAGE_IN( texture_list_index[i] );
 596         // Hmmm... cache got flushed in the middle of paging all these in,
 597         // so we need to reread them all in.
 598         if (piggy_page_flushed) {
 599                 piggy_page_flushed = 0;
 600                 for (i=0;i<po->n_textures;i++)
 601                         PIGGY_PAGE_IN( texture_list_index[i] );
 602         }
 603         // Make sure that they can all fit in memory.
 604         Assert( piggy_page_flushed == 0 );
 605 #endif
 606
 607         g3_start_instance_matrix(pos,orient);
 608
 609         g3_set_interp_points(robot_points);
 610
 611 #ifdef _3DFX
 612    _3dfx_rendering_poly_obj = 1;
 613 #endif
 614         PA_DFX(save_light = Lighting_on);
 615         PA_DFX(Lighting_on = 0);
 616
 617         if (flags == 0)         //draw entire object
 618
 619                 g3_draw_polygon_model(po->model_data,texture_list,anim_angles,light,glow_values);
 620
 621         else {
 622                 int i;
 623
 624                 for (i=0;flags;flags>>=1,i++)
 625                         if (flags & 1) {
 626                                 vms_vector ofs;
 627
 628                                 Assert(i < po->n_models);
 629
 630                                 //if submodel, rotate around its center point, not pivot point
 631
 632                                 vm_vec_avg(&ofs,&po->submodel_mins[i],&po->submodel_maxs[i]);
 633                                 vm_vec_negate(&ofs);
 634                                 g3_start_instance_matrix(&ofs,NULL);
 635
 636                                 g3_draw_polygon_model(&po->model_data[po->submodel_ptrs[i]],texture_list,anim_angles,light,glow_values);
 637
 638                                 g3_done_instance();
 639                         }
 640         }
 641
 642         g3_done_instance();
 643
 644 #ifdef _3DFX
 645    _3dfx_rendering_poly_obj = 0;
 646 #endif
 647
 648         PA_DFX (Lighting_on = save_light);
 649
 650
 651 }
 652
 653 void free_polygon_models()
 654 {
 655         int i;
 656
 657         for (i=0;i<N_polygon_models;i++) {
 658                 free_model(&Polygon_models[i]);
 659         }
 660
 661 }
 662
 663 void polyobj_find_min_max(polymodel *pm)
 664 {
 665         ushort nverts;
 666         vms_vector *vp;
 667         ushort *data,type;
 668         int m;
 669         vms_vector *big_mn,*big_mx;
 670
 671         big_mn = &pm->mins;
 672         big_mx = &pm->maxs;
 673
 674         for (m=0;m<pm->n_models;m++) {
 675                 vms_vector *mn,*mx,*ofs;
 676
 677                 mn = &pm->submodel_mins[m];
 678                 mx = &pm->submodel_maxs[m];
 679                 ofs= &pm->submodel_offsets[m];
 680
 681                 data = (ushort *)&pm->model_data[pm->submodel_ptrs[m]];
 682
 683                 type = *data++;
 684
 685                 Assert(type == 7 || type == 1);
 686
 687                 nverts = *data++;
 688
 689                 if (type==7)
 690                         data+=2;                //skip start & pad
 691
 692                 vp = (vms_vector *) data;
 693
 694                 *mn = *mx = *vp++; nverts--;
 695
 696                 if (m==0)
 697                         *big_mn = *big_mx = *mn;
 698
 699                 while (nverts--) {
 700                         if (vp->x > mx->x) mx->x = vp->x;
 701                         if (vp->y > mx->y) mx->y = vp->y;
 702                         if (vp->z > mx->z) mx->z = vp->z;
 703
 704                         if (vp->x < mn->x) mn->x = vp->x;
 705                         if (vp->y < mn->y) mn->y = vp->y;
 706                         if (vp->z < mn->z) mn->z = vp->z;
 707
 708                         if (vp->x+ofs->x > big_mx->x) big_mx->x = vp->x+ofs->x;
 709                         if (vp->y+ofs->y > big_mx->y) big_mx->y = vp->y+ofs->y;
 710                         if (vp->z+ofs->z > big_mx->z) big_mx->z = vp->z+ofs->z;
 711
 712                         if (vp->x+ofs->x < big_mn->x) big_mn->x = vp->x+ofs->x;
 713                         if (vp->y+ofs->y < big_mn->y) big_mn->y = vp->y+ofs->y;
 714                         if (vp->z+ofs->z < big_mn->z) big_mn->z = vp->z+ofs->z;
 715
 716                         vp++;
 717                 }
 718
 719 //              printf("Submodel %d:  (%8x,%8x) (%8x,%8x) (%8x,%8x)\n",m,mn->x,mx->x,mn->y,mx->y,mn->z,mx->z);
 720         }
 721
 722 //      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);
 723
 724 }
 725
 726 extern short highest_texture_num;       //from the 3d
 727
 728 char Pof_names[MAX_POLYGON_MODELS][FILENAME_LEN];
 729
 730 //returns the number of this model
 731 #ifndef DRIVE
 732 int load_polygon_model(char *filename,int n_textures,int first_texture,robot_info *r)
 733 #else
 734 int load_polygon_model(char *filename,int n_textures,grs_bitmap ***textures)
 735 #endif
 736 {
 737         #ifdef DRIVE
 738         #define r NULL
 739         #endif
 740
 741         Assert(N_polygon_models < MAX_POLYGON_MODELS);
 742         Assert(n_textures < MAX_POLYOBJ_TEXTURES);
 743
 744         //      MK was real tired of those useless, slow mprintfs...
 745         if (N_polygon_models > MAX_POLYGON_MODELS - 10)
 746                 mprintf(( 0, "Used %d/%d polygon model slots\n", N_polygon_models+1, MAX_POLYGON_MODELS ));
 747
 748         Assert(strlen(filename) <= 12);
 749         strcpy(Pof_names[N_polygon_models],filename);
 750
 751         read_model_file(&Polygon_models[N_polygon_models],filename,r);
 752
 753         polyobj_find_min_max(&Polygon_models[N_polygon_models]);
 754
 755         g3_init_polygon_model(Polygon_models[N_polygon_models].model_data);
 756
 757         if (highest_texture_num+1 != n_textures)
 758                 Error("Model <%s> references %d textures but specifies %d.",filename,highest_texture_num+1,n_textures);
 759
 760         Polygon_models[N_polygon_models].n_textures = n_textures;
 761         Polygon_models[N_polygon_models].first_texture = first_texture;
 762         Polygon_models[N_polygon_models].simpler_model = 0;
 763
 764 //      Assert(polygon_models[N_polygon_models]!=NULL);
 765
 766         N_polygon_models++;
 767
 768         return N_polygon_models-1;
 769
 770 }
 771
 772
 773 void init_polygon_models()
 774 {
 775         N_polygon_models = 0;
 776
 777         atexit((void (*)())free_polygon_models);
 778
 779 }
 780
 781 //compare against this size when figuring how far to place eye for picture
 782 #define BASE_MODEL_SIZE 0x28000
 783
 784 #define DEFAULT_VIEW_DIST 0x60000
 785
 786 //draws the given model in the current canvas.  The distance is set to
 787 //more-or-less fill the canvas.  Note that this routine actually renders
 788 //into an off-screen canvas that it creates, then copies to the current
 789 //canvas.
 790 void draw_model_picture(int mn,vms_angvec *orient_angles)
 791 {
 792         vms_vector      temp_pos=ZERO_VECTOR;
 793         vms_matrix      temp_orient = IDENTITY_MATRIX;
 794         grs_canvas      *save_canv = grd_curcanv,*temp_canv;
 795
 796         Assert(mn>=0 && mn<N_polygon_models);
 797
 798         temp_canv = gr_create_canvas(save_canv->cv_bitmap.bm_w,save_canv->cv_bitmap.bm_h);
 799         gr_set_current_canvas(temp_canv);
 800         gr_clear_canvas( BM_XRGB(0,0,0) );
 801
 802         g3_start_frame();
 803         g3_set_view_matrix(&temp_pos,&temp_orient,0x9000);
 804
 805         if (Polygon_models[mn].rad != 0)
 806                 temp_pos.z = fixmuldiv(DEFAULT_VIEW_DIST,Polygon_models[mn].rad,BASE_MODEL_SIZE);
 807         else
 808                 temp_pos.z = DEFAULT_VIEW_DIST;
 809
 810         vm_angles_2_matrix(&temp_orient, orient_angles);
 811
 812         PA_DFX(save_light = Lighting_on);
 813         PA_DFX(Lighting_on = 0);
 814         draw_polygon_model(&temp_pos,&temp_orient,NULL,mn,0,f1_0,NULL,NULL);
 815         PA_DFX (Lighting_on = save_light);
 816
 817         gr_set_current_canvas(save_canv);
 818
 819         gr_bitmap(0,0,&temp_canv->cv_bitmap);
 820
 821         gr_free_canvas(temp_canv);
 822 }
 823
 824 #ifndef FAST_FILE_IO
 825 /*
 826  * reads a polymodel structure from a CFILE
 827  */
 828 extern void polymodel_read(polymodel *pm, CFILE *fp)
 829 {
 830         int i;
 831
 832         pm->n_models = cfile_read_int(fp);
 833         pm->model_data_size = cfile_read_int(fp);
 834         pm->model_data = (ubyte *) cfile_read_int(fp);
 835         for (i = 0; i < MAX_SUBMODELS; i++)
 836                 pm->submodel_ptrs[i] = cfile_read_int(fp);
 837         for (i = 0; i < MAX_SUBMODELS; i++)
 838                 cfile_read_vector(&(pm->submodel_offsets[i]), fp);
 839         for (i = 0; i < MAX_SUBMODELS; i++)
 840                 cfile_read_vector(&(pm->submodel_norms[i]), fp);
 841         for (i = 0; i < MAX_SUBMODELS; i++)
 842                 cfile_read_vector(&(pm->submodel_pnts[i]), fp);
 843         for (i = 0; i < MAX_SUBMODELS; i++)
 844                 pm->submodel_rads[i] = cfile_read_fix(fp);
 845         cfread(pm->submodel_parents, MAX_SUBMODELS, 1, fp);
 846         for (i = 0; i < MAX_SUBMODELS; i++)
 847                 cfile_read_vector(&(pm->submodel_mins[i]), fp);
 848         for (i = 0; i < MAX_SUBMODELS; i++)
 849                 cfile_read_vector(&(pm->submodel_maxs[i]), fp);
 850         cfile_read_vector(&(pm->mins), fp);
 851         cfile_read_vector(&(pm->maxs), fp);
 852         pm->rad = cfile_read_fix(fp);
 853         pm->n_textures = cfile_read_byte(fp);
 854         pm->first_texture = cfile_read_short(fp);
 855         pm->simpler_model = cfile_read_byte(fp);
 856 }
 857
 858 /*
 859  * reads n polymodel structs from a CFILE
 860  */
 861 extern int polymodel_read_n(polymodel *pm, int n, CFILE *fp)
 862 {
 863         int i, j;
 864
 865         for (i = 0; i < n; i++) {
 866                 pm[i].n_models = cfile_read_int(fp);
 867                 pm[i].model_data_size = cfile_read_int(fp);
 868                 pm[i].model_data = (ubyte *) cfile_read_int(fp);
 869                 for (j = 0; j < MAX_SUBMODELS; j++)
 870                         pm[i].submodel_ptrs[j] = cfile_read_int(fp);
 871                 for (j = 0; j < MAX_SUBMODELS; j++)
 872                         cfile_read_vector(&(pm[i].submodel_offsets[j]), fp);
 873                 for (j = 0; j < MAX_SUBMODELS; j++)
 874                         cfile_read_vector(&(pm[i].submodel_norms[j]), fp);
 875                 for (j = 0; j < MAX_SUBMODELS; j++)
 876                         cfile_read_vector(&(pm[i].submodel_pnts[j]), fp);
 877                 for (j = 0; j < MAX_SUBMODELS; j++)
 878                         pm[i].submodel_rads[j] = cfile_read_fix(fp);
 879                 cfread(pm[i].submodel_parents, MAX_SUBMODELS, 1, fp);
 880                 for (j = 0; j < MAX_SUBMODELS; j++)
 881                         cfile_read_vector(&(pm[i].submodel_mins[j]), fp);
 882                 for (j = 0; j < MAX_SUBMODELS; j++)
 883                         cfile_read_vector(&(pm[i].submodel_maxs[j]), fp);
 884                 cfile_read_vector(&(pm[i].mins), fp);
 885                 cfile_read_vector(&(pm[i].maxs), fp);
 886                 pm[i].rad = cfile_read_fix(fp);
 887                 pm[i].n_textures = cfile_read_byte(fp);
 888                 pm[i].first_texture = cfile_read_short(fp);
 889                 pm[i].simpler_model = cfile_read_byte(fp);
 890         }
 891         return i;
 892 }
 893 #endif
 894
 895
 896 /*
 897  * routine which allocates, reads, and inits a polymodel's model_data
 898  */
 899 void polygon_model_data_read(polymodel *pm, CFILE *fp)
 900 {
 901         pm->model_data = d_malloc(pm->model_data_size);
 902         Assert(pm->model_data != NULL);
 903         cfread(pm->model_data, sizeof(ubyte), pm->model_data_size, fp );
 904 #ifdef WORDS_NEED_ALIGNMENT
 905         align_polygon_model_data(pm);
 906 #endif
 907 #ifdef WORDS_BIGENDIAN
 908         swap_polygon_model_data(pm->model_data);
 909 #endif
 910         //verify(pm->model_data);
 911         g3_init_polygon_model(pm->model_data);
 912 }