main/render.c

   1 /* $Id: render.c,v 1.9 2002-08-09 00:48:57 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  * FIXME: put description here
  18  *
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #include "pa_enabl.h"                   //$$POLY_ACC
  31 #include "inferno.h"
  32 #include "segment.h"
  33 #include "error.h"
  34 #include "bm.h"
  35 #include "texmap.h"
  36 #include "mono.h"
  37 #include "render.h"
  38 #include "game.h"
  39 #include "object.h"
  40 #include "laser.h"
  41 #include "textures.h"
  42 #include "screens.h"
  43 #include "segpoint.h"
  44 #include "wall.h"
  45 #include "texmerge.h"
  46 #include "physics.h"
  47 #include "3d.h"
  48 #include "gameseg.h"
  49 #include "vclip.h"
  50 #include "lighting.h"
  51 #include "cntrlcen.h"
  52 #include "newdemo.h"
  53 #include "automap.h"
  54 #include "endlevel.h"
  55 #include "key.h"
  56 #include "newmenu.h"
  57 #include "u_mem.h"
  58 #include "piggy.h"
  59
  60 #ifdef OGL
  61 #include "ogl_init.h"
  62 #endif
  63
  64 #define INITIAL_LOCAL_LIGHT (F1_0/4)    // local light value in segment of occurence (of light emission)
  65
  66 #ifdef EDITOR
  67 #include "editor/editor.h"
  68 #endif
  69
  70 #if defined(POLY_ACC)
  71 #include "poly_acc.h"
  72 #endif
  73
  74 //used for checking if points have been rotated
  75 int     Clear_window_color=-1;
  76 int     Clear_window=2; // 1 = Clear whole background window, 2 = clear view portals into rest of world, 0 = no clear
  77
  78 int RL_framecount=-1;
  79 short Rotated_last[MAX_VERTICES];
  80
  81 // When any render function needs to know what's looking at it, it should
  82 // access Viewer members.
  83 object * Viewer = NULL;
  84
  85 vms_vector Viewer_eye;  //valid during render
  86
  87 int     N_render_segs;
  88
  89 #ifndef MACINTOSH
  90 fix Render_zoom = 0x9000;                                       //the player's zoom factor
  91 #else
  92 fix Render_zoom = 0xB000;
  93 #endif
  94
  95 #ifndef NDEBUG
  96 ubyte object_rendered[MAX_OBJECTS];
  97 #endif
  98
  99 #define DEFAULT_RENDER_DEPTH 16
 100 int Render_depth=DEFAULT_RENDER_DEPTH;          //how many segments deep to render
 101
 102 int     Detriangulation_on = 1;                                 // 1 = allow rendering of triangulated side as a quad, 0 = don't allow
 103
 104 #ifdef EDITOR
 105 int     Render_only_bottom=0;
 106 int     Bottom_bitmap_num = 9;
 107 #endif
 108
 109 fix     Face_reflectivity = (F1_0/2);
 110
 111 #if 0           //this stuff could probably just be deleted
 112
 113 int inc_render_depth(void)
 114 {
 115         return ++Render_depth;
 116 }
 117
 118 int dec_render_depth(void)
 119 {
 120         return Render_depth==1?Render_depth:--Render_depth;
 121 }
 122
 123 int reset_render_depth(void)
 124 {
 125         return Render_depth = DEFAULT_RENDER_DEPTH;
 126 }
 127
 128 #endif
 129
 130 #ifdef EDITOR
 131 int _search_mode = 0;                   //true if looking for curseg,side,face
 132 short _search_x,_search_y;      //pixel we're looking at
 133 int found_seg,found_side,found_face,found_poly;
 134 #else
 135 #define _search_mode 0
 136 #endif
 137
 138 #ifdef NDEBUG           //if no debug code, set these vars to constants
 139
 140 #define Outline_mode 0
 141 #define Show_only_curside 0
 142
 143 #else
 144
 145 int Outline_mode=0,Show_only_curside=0;
 146
 147 int toggle_outline_mode(void)
 148 {
 149         return Outline_mode = !Outline_mode;
 150 }
 151
 152 int toggle_show_only_curside(void)
 153 {
 154         return Show_only_curside = !Show_only_curside;
 155 }
 156
 157 void draw_outline(int nverts,g3s_point **pointlist)
 158 {
 159         int i;
 160
 161         gr_setcolor(BM_XRGB(63,63,63));
 162
 163         for (i=0;i<nverts-1;i++)
 164                 g3_draw_line(pointlist[i],pointlist[i+1]);
 165
 166         g3_draw_line(pointlist[i],pointlist[0]);
 167
 168 }
 169 #endif
 170
 171 grs_canvas * reticle_canvas = NULL;
 172
 173 void free_reticle_canvas()
 174 {
 175         if (reticle_canvas)     {
 176                 d_free( reticle_canvas->cv_bitmap.bm_data );
 177                 d_free( reticle_canvas );
 178                 reticle_canvas  = NULL;
 179         }
 180 }
 181
 182 extern void show_reticle(int force_big);
 183
 184 // Draw the reticle in 3D for head tracking
 185 void draw_3d_reticle(fix eye_offset)
 186 {
 187         g3s_point       reticle_points[4];
 188         g3s_uvl         uvl[4];
 189         g3s_point       *pointlist[4];
 190         int                     i;
 191         vms_vector v1, v2;
 192         grs_canvas *saved_canvas;
 193         int saved_interp_method;
 194
 195 //      if (!Use_player_head_angles) return;
 196
 197         for (i=0; i<4; i++ )    {
 198                 pointlist[i] = &reticle_points[i];
 199                 uvl[i].l = MAX_LIGHT;
 200         }
 201         uvl[0].u = 0; uvl[0].v = 0;
 202         uvl[1].u = F1_0; uvl[1].v = 0;
 203         uvl[2].u = F1_0; uvl[2].v = F1_0;
 204         uvl[3].u = 0; uvl[3].v = F1_0;
 205
 206         vm_vec_scale_add( &v1, &Viewer->pos, &Viewer->orient.fvec, F1_0*4 );
 207         vm_vec_scale_add2(&v1,&Viewer->orient.rvec,eye_offset);
 208
 209         vm_vec_scale_add( &v2, &v1, &Viewer->orient.rvec, -F1_0*1 );
 210         vm_vec_scale_add2( &v2, &Viewer->orient.uvec, F1_0*1 );
 211         g3_rotate_point(&reticle_points[0],&v2);
 212
 213         vm_vec_scale_add( &v2, &v1, &Viewer->orient.rvec, +F1_0*1 );
 214         vm_vec_scale_add2( &v2, &Viewer->orient.uvec, F1_0*1 );
 215         g3_rotate_point(&reticle_points[1],&v2);
 216
 217         vm_vec_scale_add( &v2, &v1, &Viewer->orient.rvec, +F1_0*1 );
 218         vm_vec_scale_add2( &v2, &Viewer->orient.uvec, -F1_0*1 );
 219         g3_rotate_point(&reticle_points[2],&v2);
 220
 221         vm_vec_scale_add( &v2, &v1, &Viewer->orient.rvec, -F1_0*1 );
 222         vm_vec_scale_add2( &v2, &Viewer->orient.uvec, -F1_0*1 );
 223         g3_rotate_point(&reticle_points[3],&v2);
 224
 225         if ( reticle_canvas == NULL )   {
 226                 reticle_canvas = gr_create_canvas(64,64);
 227                 if ( !reticle_canvas )
 228                         Error( "Couldn't malloc reticle_canvas" );
 229                 atexit( free_reticle_canvas );
 230                 reticle_canvas->cv_bitmap.bm_handle = 0;
 231                 reticle_canvas->cv_bitmap.bm_flags = BM_FLAG_TRANSPARENT;
 232         }
 233
 234         saved_canvas = grd_curcanv;
 235         gr_set_current_canvas(reticle_canvas);
 236         gr_clear_canvas( TRANSPARENCY_COLOR );          // Clear to Xparent
 237         show_reticle(1);
 238         gr_set_current_canvas(saved_canvas);
 239
 240         saved_interp_method=Interpolation_method;
 241         Interpolation_method    = 3;            // The best, albiet slowest.
 242         g3_draw_tmap(4,pointlist,uvl,&reticle_canvas->cv_bitmap);
 243         Interpolation_method    = saved_interp_method;
 244 }
 245
 246
 247 extern fix Seismic_tremor_magnitude;
 248
 249 fix flash_scale;
 250
 251 #define FLASH_CYCLE_RATE f1_0
 252
 253 fix Flash_rate = FLASH_CYCLE_RATE;
 254
 255 //cycle the flashing light for when mine destroyed
 256 void flash_frame()
 257 {
 258         static fixang flash_ang=0;
 259
 260         if (!Control_center_destroyed && !Seismic_tremor_magnitude)
 261                 return;
 262
 263         if (Endlevel_sequence)
 264                 return;
 265
 266         if (PaletteBlueAdd > 10 )               //whiting out
 267                 return;
 268
 269 //      flash_ang += fixmul(FLASH_CYCLE_RATE,FrameTime);
 270         if (Seismic_tremor_magnitude) {
 271                 fix     added_flash;
 272
 273                 added_flash = abs(Seismic_tremor_magnitude);
 274                 if (added_flash < F1_0)
 275                         added_flash *= 16;
 276
 277                 flash_ang += fixmul(Flash_rate, fixmul(FrameTime, added_flash+F1_0));
 278                 fix_fastsincos(flash_ang,&flash_scale,NULL);
 279                 flash_scale = (flash_scale + F1_0*3)/4; //      gets in range 0.5 to 1.0
 280         } else {
 281                 flash_ang += fixmul(Flash_rate,FrameTime);
 282                 fix_fastsincos(flash_ang,&flash_scale,NULL);
 283                 flash_scale = (flash_scale + f1_0)/2;
 284                 if (Difficulty_level == 0)
 285                         flash_scale = (flash_scale+F1_0*3)/4;
 286         }
 287
 288
 289 }
 290
 291 // ----------------------------------------------------------------------------
 292 //      Render a face.
 293 //      It would be nice to not have to pass in segnum and sidenum, but
 294 //      they are used for our hideously hacked in headlight system.
 295 //      vp is a pointer to vertex ids.
 296 //      tmap1, tmap2 are texture map ids.  tmap2 is the pasty one.
 297 void render_face(int segnum, int sidenum, int nv, short *vp, int tmap1, int tmap2, uvl *uvlp, int wid_flags)
 298 {
 299         // -- Using new headlight system...fix                  face_light;
 300         grs_bitmap  *bm;
 301 #ifdef OGL
 302         grs_bitmap  *bm2 = NULL;
 303 #endif
 304
 305         fix                     reflect;
 306         uvl                     uvl_copy[8];
 307         int                     i;
 308         g3s_point       *pointlist[8];
 309
 310         Assert(nv <= 8);
 311
 312         for (i=0; i<nv; i++) {
 313                 uvl_copy[i] = uvlp[i];
 314                 pointlist[i] = &Segment_points[vp[i]];
 315         }
 316
 317         //handle cloaked walls
 318         if (wid_flags & WID_CLOAKED_FLAG) {
 319                 int wall_num = Segments[segnum].sides[sidenum].wall_num;
 320                 Assert(wall_num != -1);
 321                 Gr_scanline_darkening_level = Walls[wall_num].cloak_value;
 322                 gr_setcolor(BM_XRGB(0,0,0));    //set to black (matters for s3)
 323
 324                 g3_draw_poly(nv,pointlist);             //draw as flat poly
 325
 326                 Gr_scanline_darkening_level = GR_FADE_LEVELS;
 327
 328                 return;
 329         }
 330
 331         // -- Using new headlight system...face_light = -vm_vec_dot(&Viewer->orient.fvec,norm);
 332
 333         if (tmap1 >= NumTextures) {
 334                 mprintf((0,"Invalid tmap number %d, NumTextures=%d, changing to 0\n",tmap1,NumTextures));
 335
 336         #ifndef RELEASE
 337                 Int3();
 338         #endif
 339
 340                 Segments[segnum].sides[sidenum].tmap_num = 0;
 341         }
 342
 343 #ifdef OGL
 344         if (ogl_alttexmerge){
 345                 PIGGY_PAGE_IN(Textures[tmap1]);
 346                 bm = &GameBitmaps[Textures[tmap1].index];
 347                 if (tmap2){
 348                         PIGGY_PAGE_IN(Textures[tmap2&0x3FFF]);
 349                         bm2 = &GameBitmaps[Textures[tmap2&0x3FFF].index];
 350                 }
 351                 if (bm2 && (bm2->bm_flags&BM_FLAG_SUPER_TRANSPARENT)){
 352                         bm = texmerge_get_cached_bitmap( tmap1, tmap2 );
 353                         bm2 = NULL;
 354                 }
 355         } else
 356 #endif
 357
 358                 // New code for overlapping textures...
 359                 if (tmap2 != 0) {
 360                         bm = texmerge_get_cached_bitmap( tmap1, tmap2 );
 361                 } else {
 362                         bm = &GameBitmaps[Textures[tmap1].index];
 363                         PIGGY_PAGE_IN(Textures[tmap1]);
 364                 }
 365
 366         Assert( !(bm->bm_flags & BM_FLAG_PAGED_OUT) );
 367
 368         //reflect = fl2f((1.0-TmapInfo[p->tmap_num].reflect)/2.0 + 0.5);
 369         //reflect = fl2f((1.0-TmapInfo[p->tmap_num].reflect));
 370
 371         reflect = Face_reflectivity;            // f1_0;        //until we figure this stuff out...
 372
 373         //set light values for each vertex & build pointlist
 374         {
 375                 int i;
 376
 377                 // -- Using new headlight system...face_light = fixmul(face_light,reflect);
 378
 379                 for (i=0;i<nv;i++) {
 380
 381                         //the uvl struct has static light already in it
 382
 383                         //scale static light for destruction effect
 384                         if (Control_center_destroyed || Seismic_tremor_magnitude)       //make lights flash
 385                                 uvl_copy[i].l = fixmul(flash_scale,uvl_copy[i].l);
 386
 387                         //add in dynamic light (from explosions, etc.)
 388                         uvl_copy[i].l += Dynamic_light[vp[i]];
 389
 390                         //add in light from player's headlight
 391                         // -- Using new headlight system...uvl_copy[i].l += compute_headlight_light(&Segment_points[vp[i]].p3_vec,face_light);
 392
 393                         //saturate at max value
 394                         if (uvl_copy[i].l > MAX_LIGHT)
 395                                 uvl_copy[i].l = MAX_LIGHT;
 396
 397                 }
 398         }
 399
 400 #ifdef EDITOR
 401         if ((Render_only_bottom) && (sidenum == WBOTTOM))
 402                 g3_draw_tmap(nv,pointlist,(g3s_uvl *) uvl_copy,&GameBitmaps[Textures[Bottom_bitmap_num].index]);
 403         else
 404 #endif
 405
 406 #ifdef OGL
 407                 if (bm2){
 408                         g3_draw_tmap_2(nv,pointlist,(g3s_uvl *) uvl_copy,bm,bm2,((tmap2&0xC000)>>14) & 3);
 409                 }else
 410 #endif
 411                         g3_draw_tmap(nv,pointlist,(g3s_uvl *) uvl_copy,bm);
 412
 413 #ifndef NDEBUG
 414         if (Outline_mode) draw_outline(nv, pointlist);
 415 #endif
 416 }
 417
 418 #ifdef EDITOR
 419 // ----------------------------------------------------------------------------
 420 //      Only called if editor active.
 421 //      Used to determine which face was clicked on.
 422 void check_face(int segnum, int sidenum, int facenum, int nv, short *vp, int tmap1, int tmap2, uvl *uvlp)
 423 {
 424         int     i;
 425
 426         if (_search_mode) {
 427                 int save_lighting;
 428                 grs_bitmap *bm;
 429                 uvl uvl_copy[8];
 430                 g3s_point *pointlist[4];
 431
 432                 if (tmap2 > 0 )
 433                         bm = texmerge_get_cached_bitmap( tmap1, tmap2 );
 434                 else
 435                         bm = &GameBitmaps[Textures[tmap1].index];
 436
 437                 for (i=0; i<nv; i++) {
 438                         uvl_copy[i] = uvlp[i];
 439                         pointlist[i] = &Segment_points[vp[i]];
 440                 }
 441
 442                 gr_setcolor(0);
 443                 gr_pixel(_search_x,_search_y);  //set our search pixel to color zero
 444                 gr_setcolor(1);                                 //and render in color one
 445  save_lighting = Lighting_on;
 446  Lighting_on = 2;
 447                 //g3_draw_poly(nv,vp);
 448                 g3_draw_tmap(nv,pointlist, (g3s_uvl *)uvl_copy, bm);
 449  Lighting_on = save_lighting;
 450
 451                 if (gr_ugpixel(&grd_curcanv->cv_bitmap,_search_x,_search_y) == 1) {
 452                         found_seg = segnum;
 453                         found_side = sidenum;
 454                         found_face = facenum;
 455                 }
 456         }
 457 }
 458 #endif
 459
 460 fix     Tulate_min_dot = (F1_0/4);
 461 //--unused-- fix        Tulate_min_ratio = (2*F1_0);
 462 fix     Min_n0_n1_dot   = (F1_0*15/16);
 463
 464 extern int contains_flare(segment *segp, int sidenum);
 465 extern fix      Obj_light_xlate[16];
 466
 467 // -----------------------------------------------------------------------------------
 468 //      Render a side.
 469 //      Check for normal facing.  If so, render faces on side dictated by sidep->type.
 470 void render_side(segment *segp, int sidenum)
 471 {
 472         short                   vertnum_list[4];
 473         side                    *sidep = &segp->sides[sidenum];
 474         vms_vector      tvec;
 475         fix                     v_dot_n0, v_dot_n1;
 476         uvl                     temp_uvls[3];
 477         fix                     min_dot, max_dot;
 478         vms_vector  normals[2];
 479         int                     wid_flags;
 480
 481
 482         wid_flags = WALL_IS_DOORWAY(segp,sidenum);
 483
 484         if (!(wid_flags & WID_RENDER_FLAG))             //if (WALL_IS_DOORWAY(segp, sidenum) == WID_NO_WALL)
 485                 return;
 486
 487 #ifdef COMPACT_SEGS
 488         get_side_normals(segp, sidenum, &normals[0], &normals[1] );
 489 #else
 490         normals[0] = segp->sides[sidenum].normals[0];
 491         normals[1] = segp->sides[sidenum].normals[1];
 492 #endif
 493
 494         //      ========== Mark: Here is the change...beginning here: ==========
 495
 496         if (sidep->type == SIDE_IS_QUAD) {
 497
 498                 vm_vec_sub(&tvec, &Viewer_eye, &Vertices[segp->verts[Side_to_verts[sidenum][0]]]);
 499
 500                 // -- Old, slow way --  //      Regardless of whether this side is comprised of a single quad, or two triangles, we need to know one normal, so
 501                 // -- Old, slow way --  //      deal with it, get the dot product.
 502                 // -- Old, slow way --  if (sidep->type == SIDE_IS_TRI_13)
 503                 // -- Old, slow way --          vm_vec_normalized_dir(&tvec, &Viewer_eye, &Vertices[segp->verts[Side_to_verts[sidenum][1]]]);
 504                 // -- Old, slow way --  else
 505                 // -- Old, slow way --          vm_vec_normalized_dir(&tvec, &Viewer_eye, &Vertices[segp->verts[Side_to_verts[sidenum][0]]]);
 506
 507                 get_side_verts(vertnum_list,segp-Segments,sidenum);
 508                 v_dot_n0 = vm_vec_dot(&tvec, &normals[0]);
 509
 510 // -- flare creates point -- {
 511 // -- flare creates point --    int     flare_index;
 512 // -- flare creates point --
 513 // -- flare creates point --    flare_index = contains_flare(segp, sidenum);
 514 // -- flare creates point --
 515 // -- flare creates point --    if (flare_index != -1) {
 516 // -- flare creates point --            int                     tri;
 517 // -- flare creates point --            fix                     u, v, l;
 518 // -- flare creates point --            vms_vector      *hit_point;
 519 // -- flare creates point --            short                   vertnum_list[4];
 520 // -- flare creates point --
 521 // -- flare creates point --            hit_point = &Objects[flare_index].pos;
 522 // -- flare creates point --
 523 // -- flare creates point --            find_hitpoint_uv( &u, &v, &l, hit_point, segp, sidenum, 0);     //      last parm means always use face 0.
 524 // -- flare creates point --
 525 // -- flare creates point --            get_side_verts(vertnum_list, segp-Segments, sidenum);
 526 // -- flare creates point --
 527 // -- flare creates point --            g3_rotate_point(&Segment_points[MAX_VERTICES-1], hit_point);
 528 // -- flare creates point --
 529 // -- flare creates point --            for (tri=0; tri<4; tri++) {
 530 // -- flare creates point --                    short   tri_verts[3];
 531 // -- flare creates point --                    uvl     tri_uvls[3];
 532 // -- flare creates point --
 533 // -- flare creates point --                    tri_verts[0] = vertnum_list[tri];
 534 // -- flare creates point --                    tri_verts[1] = vertnum_list[(tri+1) % 4];
 535 // -- flare creates point --                    tri_verts[2] = MAX_VERTICES-1;
 536 // -- flare creates point --
 537 // -- flare creates point --                    tri_uvls[0] = sidep->uvls[tri];
 538 // -- flare creates point --                    tri_uvls[1] = sidep->uvls[(tri+1)%4];
 539 // -- flare creates point --                    tri_uvls[2].u = u;
 540 // -- flare creates point --                    tri_uvls[2].v = v;
 541 // -- flare creates point --                    tri_uvls[2].l = F1_0;
 542 // -- flare creates point --
 543 // -- flare creates point --                    render_face(segp-Segments, sidenum, 3, tri_verts, sidep->tmap_num, sidep->tmap_num2, tri_uvls, &normals[0]);
 544 // -- flare creates point --            }
 545 // -- flare creates point --
 546 // -- flare creates point --    return;
 547 // -- flare creates point --    }
 548 // -- flare creates point -- }
 549
 550                 if (v_dot_n0 >= 0) {
 551                         render_face(segp-Segments, sidenum, 4, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls, wid_flags);
 552                         #ifdef EDITOR
 553                         check_face(segp-Segments, sidenum, 0, 4, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 554                         #endif
 555                 }
 556         } else {
 557                 //      Regardless of whether this side is comprised of a single quad, or two triangles, we need to know one normal, so
 558                 //      deal with it, get the dot product.
 559                 if (sidep->type == SIDE_IS_TRI_13)
 560                         vm_vec_normalized_dir_quick(&tvec, &Viewer_eye, &Vertices[segp->verts[Side_to_verts[sidenum][1]]]);
 561                 else
 562                         vm_vec_normalized_dir_quick(&tvec, &Viewer_eye, &Vertices[segp->verts[Side_to_verts[sidenum][0]]]);
 563
 564                 get_side_verts(vertnum_list,segp-Segments,sidenum);
 565
 566                 v_dot_n0 = vm_vec_dot(&tvec, &normals[0]);
 567
 568                 //      ========== Mark: The change ends here. ==========
 569
 570                 //      Although this side has been triangulated, because it is not planar, see if it is acceptable
 571                 //      to render it as a single quadrilateral.  This is a function of how far away the viewer is, how non-planar
 572                 //      the face is, how normal to the surfaces the view is.
 573                 //      Now, if both dot products are close to 1.0, then render two triangles as a single quad.
 574                 v_dot_n1 = vm_vec_dot(&tvec, &normals[1]);
 575
 576                 if (v_dot_n0 < v_dot_n1) {
 577                         min_dot = v_dot_n0;
 578                         max_dot = v_dot_n1;
 579                 } else {
 580                         min_dot = v_dot_n1;
 581                         max_dot = v_dot_n0;
 582                 }
 583
 584                 //      Determine whether to detriangulate side: (speed hack, assumes Tulate_min_ratio == F1_0*2, should fixmul(min_dot, Tulate_min_ratio))
 585                 if (Detriangulation_on && ((min_dot+F1_0/256 > max_dot) || ((Viewer->segnum != segp-Segments) &&  (min_dot > Tulate_min_dot) && (max_dot < min_dot*2)))) {
 586                         fix     n0_dot_n1;
 587
 588                         //      The other detriangulation code doesn't deal well with badly non-planar sides.
 589                         n0_dot_n1 = vm_vec_dot(&normals[0], &normals[1]);
 590                         if (n0_dot_n1 < Min_n0_n1_dot)
 591                                 goto im_so_ashamed;
 592
 593                         render_face(segp-Segments, sidenum, 4, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls, wid_flags);
 594                         #ifdef EDITOR
 595                         check_face(segp-Segments, sidenum, 0, 4, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 596                         #endif
 597                 } else {
 598 im_so_ashamed: ;
 599                         if (sidep->type == SIDE_IS_TRI_02) {
 600                                 if (v_dot_n0 >= 0) {
 601                                         render_face(segp-Segments, sidenum, 3, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls, wid_flags);
 602                                         #ifdef EDITOR
 603                                         check_face(segp-Segments, sidenum, 0, 3, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 604                                         #endif
 605                                 }
 606
 607                                 if (v_dot_n1 >= 0) {
 608                                         temp_uvls[0] = sidep->uvls[0];          temp_uvls[1] = sidep->uvls[2];          temp_uvls[2] = sidep->uvls[3];
 609                                         vertnum_list[1] = vertnum_list[2];      vertnum_list[2] = vertnum_list[3];      // want to render from vertices 0, 2, 3 on side
 610                                         render_face(segp-Segments, sidenum, 3, &vertnum_list[0], sidep->tmap_num, sidep->tmap_num2, temp_uvls, wid_flags);
 611                                         #ifdef EDITOR
 612                                         check_face(segp-Segments, sidenum, 1, 3, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 613                                         #endif
 614                                 }
 615                         } else if (sidep->type ==  SIDE_IS_TRI_13) {
 616                                 if (v_dot_n1 >= 0) {
 617                                         render_face(segp-Segments, sidenum, 3, &vertnum_list[1], sidep->tmap_num, sidep->tmap_num2, &sidep->uvls[1], wid_flags);        // rendering 1,2,3, so just skip 0
 618                                         #ifdef EDITOR
 619                                         check_face(segp-Segments, sidenum, 1, 3, &vertnum_list[1], sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 620                                         #endif
 621                                 }
 622
 623                                 if (v_dot_n0 >= 0) {
 624                                         temp_uvls[0] = sidep->uvls[0];          temp_uvls[1] = sidep->uvls[1];          temp_uvls[2] = sidep->uvls[3];
 625                                         vertnum_list[2] = vertnum_list[3];              // want to render from vertices 0,1,3
 626                                         render_face(segp-Segments, sidenum, 3, vertnum_list, sidep->tmap_num, sidep->tmap_num2, temp_uvls, wid_flags);
 627                                         #ifdef EDITOR
 628                                         check_face(segp-Segments, sidenum, 0, 3, vertnum_list, sidep->tmap_num, sidep->tmap_num2, sidep->uvls);
 629                                         #endif
 630                                 }
 631
 632                         } else
 633 #ifdef __DJGPP__
 634                                 Error("Illegal side type in render_side, type = %i, segment # = %li, side # = %i\n", sidep->type, segp-Segments, sidenum);
 635 #else
 636                                 Error("Illegal side type in render_side, type = %i, segment # = %i, side # = %i\n", sidep->type, segp-Segments, sidenum);
 637 #endif
 638                 }
 639         }
 640
 641 }
 642
 643 #ifdef EDITOR
 644 void render_object_search(object *obj)
 645 {
 646         int changed=0;
 647
 648         //note that we draw each pixel object twice, since we cannot control
 649         //what color the object draws in, so we try color 0, then color 1,
 650         //in case the object itself is rendering color 0
 651
 652         gr_setcolor(0);
 653         gr_pixel(_search_x,_search_y);  //set our search pixel to color zero
 654         render_object(obj);
 655         if (gr_ugpixel(&grd_curcanv->cv_bitmap,_search_x,_search_y) != 0)
 656                 changed=1;
 657
 658         gr_setcolor(1);
 659         gr_pixel(_search_x,_search_y);  //set our search pixel to color zero
 660         render_object(obj);
 661         if (gr_ugpixel(&grd_curcanv->cv_bitmap,_search_x,_search_y) != 1)
 662                 changed=1;
 663
 664         if (changed) {
 665                 if (obj->segnum != -1)
 666                         Cursegp = &Segments[obj->segnum];
 667                 found_seg = -(obj-Objects+1);
 668         }
 669 }
 670 #endif
 671
 672 extern ubyte DemoDoingRight,DemoDoingLeft;
 673
 674 void do_render_object(int objnum, int window_num)
 675 {
 676         #ifdef EDITOR
 677         int save_3d_outline=0;
 678         #endif
 679         object *obj = &Objects[objnum];
 680         int count = 0;
 681         int n;
 682
 683         Assert(objnum < MAX_OBJECTS);
 684
 685         #ifndef NDEBUG
 686         if (object_rendered[objnum]) {          //already rendered this...
 687                 Int3();         //get Matt!!!
 688                 return;
 689         }
 690
 691         object_rendered[objnum] = 1;
 692         #endif
 693
 694    if (Newdemo_state==ND_STATE_PLAYBACK)
 695          {
 696           if ((DemoDoingLeft==6 || DemoDoingRight==6) && Objects[objnum].type==OBJ_PLAYER)
 697                 {
 698                         // A nice fat hack: keeps the player ship from showing up in the
 699                         // small extra view when guiding a missile in the big window
 700
 701                         mprintf ((0,"Returning from render_object prematurely...\n"));
 702                         return;
 703                 }
 704          }
 705
 706         //      Added by MK on 09/07/94 (at about 5:28 pm, CDT, on a beautiful, sunny late summer day!) so
 707         //      that the guided missile system will know what objects to look at.
 708         //      I didn't know we had guided missiles before the release of D1. --MK
 709         if ((Objects[objnum].type == OBJ_ROBOT) || (Objects[objnum].type == OBJ_PLAYER)) {
 710                 //Assert(Window_rendered_data[window_num].rendered_objects < MAX_RENDERED_OBJECTS);
 711                 //      This peculiar piece of code makes us keep track of the most recently rendered objects, which
 712                 //      are probably the higher priority objects, without overflowing the buffer
 713                 if (Window_rendered_data[window_num].num_objects >= MAX_RENDERED_OBJECTS) {
 714                         Int3();
 715                         Window_rendered_data[window_num].num_objects /= 2;
 716                 }
 717                 Window_rendered_data[window_num].rendered_objects[Window_rendered_data[window_num].num_objects++] = objnum;
 718         }
 719
 720         if ((count++ > MAX_OBJECTS) || (obj->next == objnum)) {
 721                 Int3();                                 // infinite loop detected
 722                 obj->next = -1;         // won't this clean things up?
 723                 return;                                 // get out of this infinite loop!
 724         }
 725
 726                 //g3_draw_object(obj->class_id,&obj->pos,&obj->orient,obj->size);
 727
 728         //check for editor object
 729
 730         #ifdef EDITOR
 731         if (Function_mode==FMODE_EDITOR && objnum==Cur_object_index) {
 732                 save_3d_outline = g3d_interp_outline;
 733                 g3d_interp_outline=1;
 734         }
 735         #endif
 736
 737         #ifdef EDITOR
 738         if (_search_mode)
 739                 render_object_search(obj);
 740         else
 741         #endif
 742                 //NOTE LINK TO ABOVE
 743                 render_object(obj);
 744
 745         for (n=obj->attached_obj;n!=-1;n=Objects[n].ctype.expl_info.next_attach) {
 746
 747                 Assert(Objects[n].type == OBJ_FIREBALL);
 748                 Assert(Objects[n].control_type == CT_EXPLOSION);
 749                 Assert(Objects[n].flags & OF_ATTACHED);
 750
 751                 render_object(&Objects[n]);
 752         }
 753
 754
 755         #ifdef EDITOR
 756         if (Function_mode==FMODE_EDITOR && objnum==Cur_object_index)
 757                 g3d_interp_outline = save_3d_outline;
 758         #endif
 759
 760
 761         //DEBUG mprintf( (0, "%d ", objnum ));
 762
 763 }
 764
 765 #ifndef NDEBUG
 766 int     draw_boxes=0;
 767 int window_check=1,draw_edges=0,new_seg_sorting=1,pre_draw_segs=0;
 768 int no_migrate_segs=1,migrate_objects=1,behind_check=1;
 769 int check_window_check=0;
 770 #else
 771 #define draw_boxes                      0
 772 #define window_check                    1
 773 #define draw_edges                      0
 774 #define new_seg_sorting         1
 775 #define pre_draw_segs           0
 776 #define no_migrate_segs         1
 777 #define migrate_objects         1
 778 #define behind_check                    1
 779 #define check_window_check      0
 780 #endif
 781
 782 //increment counter for checking if points rotated
 783 //This must be called at the start of the frame if rotate_list() will be used
 784 void render_start_frame()
 785 {
 786         RL_framecount++;
 787
 788         if (RL_framecount==0) {         //wrap!
 789
 790                 memset(Rotated_last,0,sizeof(Rotated_last));            //clear all to zero
 791                 RL_framecount=1;                                                                                        //and set this frame to 1
 792         }
 793 }
 794
 795 //Given a lit of point numbers, rotate any that haven't been rotated this frame
 796 g3s_codes rotate_list(int nv,short *pointnumlist)
 797 {
 798         int i,pnum;
 799         g3s_point *pnt;
 800         g3s_codes cc;
 801
 802         cc.and = 0xff;  cc.or = 0;
 803
 804         for (i=0;i<nv;i++) {
 805
 806                 pnum = pointnumlist[i];
 807
 808                 pnt = &Segment_points[pnum];
 809
 810                 if (Rotated_last[pnum] != RL_framecount) {
 811
 812                         g3_rotate_point(pnt,&Vertices[pnum]);
 813
 814                         Rotated_last[pnum] = RL_framecount;
 815                 }
 816
 817                 cc.and &= pnt->p3_codes;
 818                 cc.or  |= pnt->p3_codes;
 819         }
 820
 821         return cc;
 822
 823 }
 824
 825 //Given a lit of point numbers, project any that haven't been projected
 826 void project_list(int nv,short *pointnumlist)
 827 {
 828         int i,pnum;
 829
 830         for (i=0;i<nv;i++) {
 831
 832                 pnum = pointnumlist[i];
 833
 834                 if (!(Segment_points[pnum].p3_flags & PF_PROJECTED))
 835
 836                         g3_project_point(&Segment_points[pnum]);
 837
 838         }
 839 }
 840
 841
 842 // -----------------------------------------------------------------------------------
 843 void render_segment(int segnum, int window_num)
 844 {
 845         segment         *seg = &Segments[segnum];
 846         g3s_codes       cc;
 847         int                     sn;
 848
 849         Assert(segnum!=-1 && segnum<=Highest_segment_index);
 850
 851         cc=rotate_list(8,seg->verts);
 852
 853         if (! cc.and) {         //all off screen?
 854
 855 //mprintf( (0, "!"));
 856                 //DEBUG mprintf( (0, "[Segment %d: ", segnum ));
 857
 858                 // set_segment_local_light_value(segnum,INITIAL_LOCAL_LIGHT);
 859
 860       if (Viewer->type!=OBJ_ROBOT)
 861                 Automap_visited[segnum]=1;
 862
 863                 for (sn=0; sn<MAX_SIDES_PER_SEGMENT; sn++)
 864                         render_side(seg, sn);
 865         }
 866
 867         //draw any objects that happen to be in this segment
 868
 869         //sort objects!
 870         //object_sort_segment_objects( seg );
 871
 872         #ifndef NDEBUG
 873         if (!migrate_objects) {
 874                 int objnum;
 875                 for (objnum=seg->objects;objnum!=-1;objnum=Objects[objnum].next)
 876                         do_render_object(objnum, window_num);
 877         }
 878         #endif
 879
 880         //DEBUG mprintf( (0, "]\n", segnum ));
 881
 882 }
 883
 884 // ----- This used to be called when Show_only_curside was set.
 885 // ----- It is wholly and superiorly replaced by render_side.
 886 // -- //render one side of one segment
 887 // -- void render_seg_side(segment *seg,int _side)
 888 // -- {
 889 // --   g3s_codes cc;
 890 // --   short vertnum_list[4];
 891 // --
 892 // --   cc=g3_rotate_list(8,&seg->verts);
 893 // --
 894 // --   if (! cc.and) {         //all off screen?
 895 // --           int fn,pn,i;
 896 // --           side *s;
 897 // --           face *f;
 898 // --           poly *p;
 899 // --
 900 // --           s=&seg->sides[_side];
 901 // --
 902 // --           for (f=s->faces,fn=s->num_faces;fn;fn--,f++)
 903 // --                   for (p=f->polys,pn=f->num_polys;pn;pn--,p++) {
 904 // --                           grs_bitmap *tmap;
 905 // --
 906 // --                           for (i=0;i<p->num_vertices;i++) vertnum_list[i] = seg->verts[p->verts[i]];
 907 // --
 908 // --                           if (p->tmap_num >= NumTextures) {
 909 // --                                   Warning("Invalid tmap number %d, NumTextures=%d\n...Changing in poly structure to tmap 0",p->tmap_num,NumTextures);
 910 // --                                   p->tmap_num = 0;                //change it permanantly
 911 // --                           }
 912 // --
 913 // --                           tmap = Textures[p->tmap_num];
 914 // --
 915 // --                           g3_check_and_draw_tmap(p->num_vertices,vertnum_list,(g3s_uvl *) &p->uvls,tmap,&f->normal);
 916 // --
 917 // --                           if (Outline_mode) draw_outline(p->num_vertices,vertnum_list);
 918 // --                   }
 919 // --           }
 920 // --
 921 // -- }
 922
 923 #define CROSS_WIDTH  i2f(8)
 924 #define CROSS_HEIGHT i2f(8)
 925
 926 #ifndef NDEBUG
 927
 928 //draw outline for curside
 929 void outline_seg_side(segment *seg,int _side,int edge,int vert)
 930 {
 931         g3s_codes cc;
 932
 933         cc=rotate_list(8,seg->verts);
 934
 935         if (! cc.and) {         //all off screen?
 936                 side *s;
 937                 g3s_point *pnt;
 938
 939                 s=&seg->sides[_side];
 940
 941                 //render curedge of curside of curseg in green
 942
 943                 gr_setcolor(BM_XRGB(0,63,0));
 944                 g3_draw_line(&Segment_points[seg->verts[Side_to_verts[_side][edge]]],&Segment_points[seg->verts[Side_to_verts[_side][(edge+1)%4]]]);
 945
 946                 //draw a little cross at the current vert
 947
 948                 pnt = &Segment_points[seg->verts[Side_to_verts[_side][vert]]];
 949
 950                 g3_project_point(pnt);          //make sure projected
 951
 952 //              gr_setcolor(BM_XRGB(0,0,63));
 953 //              gr_line(pnt->p3_sx-CROSS_WIDTH,pnt->p3_sy,pnt->p3_sx+CROSS_WIDTH,pnt->p3_sy);
 954 //              gr_line(pnt->p3_sx,pnt->p3_sy-CROSS_HEIGHT,pnt->p3_sx,pnt->p3_sy+CROSS_HEIGHT);
 955
 956                 gr_line(pnt->p3_sx-CROSS_WIDTH,pnt->p3_sy,pnt->p3_sx,pnt->p3_sy-CROSS_HEIGHT);
 957                 gr_line(pnt->p3_sx,pnt->p3_sy-CROSS_HEIGHT,pnt->p3_sx+CROSS_WIDTH,pnt->p3_sy);
 958                 gr_line(pnt->p3_sx+CROSS_WIDTH,pnt->p3_sy,pnt->p3_sx,pnt->p3_sy+CROSS_HEIGHT);
 959                 gr_line(pnt->p3_sx,pnt->p3_sy+CROSS_HEIGHT,pnt->p3_sx-CROSS_WIDTH,pnt->p3_sy);
 960         }
 961 }
 962
 963 #endif
 964
 965 #if 0           //this stuff could probably just be deleted
 966
 967 #define DEFAULT_PERSPECTIVE_DEPTH 6
 968
 969 int Perspective_depth=DEFAULT_PERSPECTIVE_DEPTH;        //how many levels deep to render in perspective
 970
 971 int inc_perspective_depth(void)
 972 {
 973         return ++Perspective_depth;
 974
 975 }
 976
 977 int dec_perspective_depth(void)
 978 {
 979         return Perspective_depth==1?Perspective_depth:--Perspective_depth;
 980
 981 }
 982
 983 int reset_perspective_depth(void)
 984 {
 985         return Perspective_depth = DEFAULT_PERSPECTIVE_DEPTH;
 986
 987 }
 988 #endif
 989
 990 typedef struct window {
 991         short left,top,right,bot;
 992 } window;
 993
 994 ubyte code_window_point(fix x,fix y,window *w)
 995 {
 996         ubyte code=0;
 997
 998         if (x <= w->left)  code |= 1;
 999         if (x >= w->right) code |= 2;
1000
1001         if (y <= w->top) code |= 4;
1002         if (y >= w->bot) code |= 8;
1003
1004         return code;
1005 }
1006
1007 #ifndef NDEBUG
1008 void draw_window_box(int color,short left,short top,short right,short bot)
1009 {
1010         short l,t,r,b;
1011
1012         gr_setcolor(color);
1013
1014         l=left; t=top; r=right; b=bot;
1015
1016         if ( r<0 || b<0 || l>=grd_curcanv->cv_bitmap.bm_w || (t>=grd_curcanv->cv_bitmap.bm_h && b>=grd_curcanv->cv_bitmap.bm_h))
1017                 return;
1018
1019         if (l<0) l=0;
1020         if (t<0) t=0;
1021         if (r>=grd_curcanv->cv_bitmap.bm_w) r=grd_curcanv->cv_bitmap.bm_w-1;
1022         if (b>=grd_curcanv->cv_bitmap.bm_h) b=grd_curcanv->cv_bitmap.bm_h-1;
1023
1024         gr_line(i2f(l),i2f(t),i2f(r),i2f(t));
1025         gr_line(i2f(r),i2f(t),i2f(r),i2f(b));
1026         gr_line(i2f(r),i2f(b),i2f(l),i2f(b));
1027         gr_line(i2f(l),i2f(b),i2f(l),i2f(t));
1028
1029 }
1030 #endif
1031
1032 int matt_find_connect_side(int seg0,int seg1);
1033
1034 #ifndef NDEBUG
1035 char visited2[MAX_SEGMENTS];
1036 #endif
1037
1038 char visited[MAX_SEGMENTS];
1039 short Render_list[MAX_RENDER_SEGS];
1040 short Seg_depth[MAX_RENDER_SEGS];               //depth for each seg in Render_list
1041 ubyte processed[MAX_RENDER_SEGS];               //whether each entry has been processed
1042 int     lcnt_save,scnt_save;
1043 //@@short *persp_ptr;
1044 short render_pos[MAX_SEGMENTS]; //where in render_list does this segment appear?
1045 //ubyte no_render_flag[MAX_RENDER_SEGS];
1046 window render_windows[MAX_RENDER_SEGS];
1047
1048 short render_obj_list[MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS][OBJS_PER_SEG];
1049
1050 //for objects
1051
1052
1053
1054 #define RED   BM_XRGB(63,0,0)
1055 #define WHITE BM_XRGB(63,63,63)
1056
1057 //Given two sides of segment, tell the two verts which form the
1058 //edge between them
1059 short Two_sides_to_edge[6][6][2] = {
1060         { {-1,-1}, {3,7}, {-1,-1}, {2,6}, {6,7}, {2,3} },
1061         { {3,7}, {-1,-1}, {0,4}, {-1,-1}, {4,7}, {0,3} },
1062         { {-1,-1}, {0,4}, {-1,-1}, {1,5}, {4,5}, {0,1} },
1063         { {2,6}, {-1,-1}, {1,5}, {-1,-1}, {5,6}, {1,2} },
1064         { {6,7}, {4,7}, {4,5}, {5,6}, {-1,-1}, {-1,-1} },
1065         { {2,3}, {0,3}, {0,1}, {1,2}, {-1,-1}, {-1,-1} }
1066 };
1067
1068 //given an edge specified by two verts, give the two sides on that edge
1069 int Edge_to_sides[8][8][2] = {
1070         { {-1,-1}, {2,5}, {-1,-1}, {1,5}, {1,2}, {-1,-1}, {-1,-1}, {-1,-1} },
1071         { {2,5}, {-1,-1}, {3,5}, {-1,-1}, {-1,-1}, {2,3}, {-1,-1}, {-1,-1} },
1072         { {-1,-1}, {3,5}, {-1,-1}, {0,5}, {-1,-1}, {-1,-1}, {0,3}, {-1,-1} },
1073         { {1,5}, {-1,-1}, {0,5}, {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1}, {0,1} },
1074         { {1,2}, {-1,-1}, {-1,-1}, {-1,-1}, {-1,-1}, {2,4}, {-1,-1}, {1,4} },
1075         { {-1,-1}, {2,3}, {-1,-1}, {-1,-1}, {2,4}, {-1,-1}, {3,4}, {-1,-1} },
1076         { {-1,-1}, {-1,-1}, {0,3}, {-1,-1}, {-1,-1}, {3,4}, {-1,-1}, {0,4} },
1077         { {-1,-1}, {-1,-1}, {-1,-1}, {0,1}, {1,4}, {-1,-1}, {0,4}, {-1,-1} },
1078 };
1079
1080 //@@//perform simple check on tables
1081 //@@check_check()
1082 //@@{
1083 //@@    int i,j;
1084 //@@
1085 //@@    for (i=0;i<8;i++)
1086 //@@            for (j=0;j<8;j++)
1087 //@@                    Assert(Edge_to_sides[i][j][0] == Edge_to_sides[j][i][0] &&
1088 //@@                                    Edge_to_sides[i][j][1] == Edge_to_sides[j][i][1]);
1089 //@@
1090 //@@    for (i=0;i<6;i++)
1091 //@@            for (j=0;j<6;j++)
1092 //@@                    Assert(Two_sides_to_edge[i][j][0] == Two_sides_to_edge[j][i][0] &&
1093 //@@                                    Two_sides_to_edge[i][j][1] == Two_sides_to_edge[j][i][1]);
1094 //@@
1095 //@@
1096 //@@}
1097
1098
1099 //given an edge, tell what side is on that edge
1100 int find_seg_side(segment *seg,short *verts,int notside)
1101 {
1102         int i;
1103         int vv0=-1,vv1=-1;
1104         int side0,side1;
1105         int *eptr;
1106         int     v0,v1;
1107         short   *vp;
1108
1109 //@@    check_check();
1110
1111         v0 = verts[0];
1112         v1 = verts[1];
1113         vp = seg->verts;
1114
1115         for (i=0; i<8; i++) {
1116                 int svv = *vp++;        // seg->verts[i];
1117
1118                 if (vv0==-1 && svv == v0) {
1119                         vv0 = i;
1120                         if (vv1 != -1)
1121                                 break;
1122                 }
1123
1124                 if (vv1==-1 && svv == v1) {
1125                         vv1 = i;
1126                         if (vv0 != -1)
1127                                 break;
1128                 }
1129         }
1130
1131         Assert(vv0!=-1 && vv1!=-1);
1132
1133         eptr = Edge_to_sides[vv0][vv1];
1134
1135         side0 = eptr[0];
1136         side1 = eptr[1];
1137
1138         Assert(side0!=-1 && side1!=-1);
1139
1140         if (side0 != notside) {
1141                 Assert(side1==notside);
1142                 return side0;
1143         }
1144         else {
1145                 Assert(side0==notside);
1146                 return side1;
1147         }
1148
1149 }
1150
1151 //find the two segments that join a given seg though two sides, and
1152 //the sides of those segments the abut.
1153 int find_joining_side_norms(vms_vector *norm0_0,vms_vector *norm0_1,vms_vector *norm1_0,vms_vector *norm1_1,vms_vector **pnt0,vms_vector **pnt1,segment *seg,int s0,int s1)
1154 {
1155         segment *seg0,*seg1;
1156         short edge_verts[2];
1157         int notside0,notside1;
1158         int edgeside0,edgeside1;
1159
1160         Assert(s0!=-1 && s1!=-1);
1161
1162         seg0 = &Segments[seg->children[s0]];
1163         seg1 = &Segments[seg->children[s1]];
1164
1165         edge_verts[0] = seg->verts[Two_sides_to_edge[s0][s1][0]];
1166         edge_verts[1] = seg->verts[Two_sides_to_edge[s0][s1][1]];
1167
1168         Assert(edge_verts[0]!=-1 && edge_verts[1]!=-1);
1169
1170         notside0 = find_connect_side(seg,seg0);
1171         Assert(notside0 != -1);
1172         notside1 = find_connect_side(seg,seg1);
1173         Assert(notside1 != -1);
1174
1175         edgeside0 = find_seg_side(seg0,edge_verts,notside0);
1176         edgeside1 = find_seg_side(seg1,edge_verts,notside1);
1177
1178         //deal with the case where an edge is shared by more than two segments
1179
1180 //@@    if (IS_CHILD(seg0->children[edgeside0])) {
1181 //@@            segment *seg00;
1182 //@@            int notside00;
1183 //@@
1184 //@@            seg00 = &Segments[seg0->children[edgeside0]];
1185 //@@
1186 //@@            if (seg00 != seg1) {
1187 //@@
1188 //@@                    notside00 = find_connect_side(seg0,seg00);
1189 //@@                    Assert(notside00 != -1);
1190 //@@
1191 //@@                    edgeside0 = find_seg_side(seg00,edge_verts,notside00);
1192 //@@                    seg0 = seg00;
1193 //@@            }
1194 //@@
1195 //@@    }
1196 //@@
1197 //@@    if (IS_CHILD(seg1->children[edgeside1])) {
1198 //@@            segment *seg11;
1199 //@@            int notside11;
1200 //@@
1201 //@@            seg11 = &Segments[seg1->children[edgeside1]];
1202 //@@
1203 //@@            if (seg11 != seg0) {
1204 //@@                    notside11 = find_connect_side(seg1,seg11);
1205 //@@                    Assert(notside11 != -1);
1206 //@@
1207 //@@                    edgeside1 = find_seg_side(seg11,edge_verts,notside11);
1208 //@@                    seg1 = seg11;
1209 //@@            }
1210 //@@    }
1211
1212 //      if ( IS_CHILD(seg0->children[edgeside0]) ||
1213 //                IS_CHILD(seg1->children[edgeside1]))
1214 //              return 0;
1215
1216         #ifdef COMPACT_SEGS
1217                 get_side_normals(seg0, edgeside0, norm0_0, norm0_1 );
1218                 get_side_normals(seg1, edgeside1, norm1_0, norm1_1 );
1219         #else
1220                 *norm0_0 = seg0->sides[edgeside0].normals[0];
1221                 *norm0_1 = seg0->sides[edgeside0].normals[1];
1222                 *norm1_0 = seg1->sides[edgeside1].normals[0];
1223                 *norm1_1 = seg1->sides[edgeside1].normals[1];
1224         #endif
1225
1226         *pnt0 = &Vertices[seg0->verts[Side_to_verts[edgeside0][seg0->sides[edgeside0].type==3?1:0]]];
1227         *pnt1 = &Vertices[seg1->verts[Side_to_verts[edgeside1][seg1->sides[edgeside1].type==3?1:0]]];
1228
1229         return 1;
1230 }
1231
1232 //see if the order matters for these two children.
1233 //returns 0 if order doesn't matter, 1 if c0 before c1, -1 if c1 before c0
1234 int compare_children(segment *seg,short c0,short c1)
1235 {
1236         vms_vector norm0_0,norm0_1,*pnt0,temp;
1237         vms_vector norm1_0,norm1_1,*pnt1;
1238         fix d0_0,d0_1,d1_0,d1_1,d0,d1;
1239 int t;
1240
1241         if (Side_opposite[c0] == c1) return 0;
1242
1243         Assert(c0!=-1 && c1!=-1);
1244
1245         //find normals of adjoining sides
1246
1247         t = find_joining_side_norms(&norm0_0,&norm0_1,&norm1_0,&norm1_1,&pnt0,&pnt1,seg,c0,c1);
1248
1249 //if (!t)
1250 // return 0;
1251
1252         vm_vec_sub(&temp,&Viewer_eye,pnt0);
1253         d0_0 = vm_vec_dot(&norm0_0,&temp);
1254         d0_1 = vm_vec_dot(&norm0_1,&temp);
1255
1256         vm_vec_sub(&temp,&Viewer_eye,pnt1);
1257         d1_0 = vm_vec_dot(&norm1_0,&temp);
1258         d1_1 = vm_vec_dot(&norm1_1,&temp);
1259
1260         d0 = (d0_0 < 0 || d0_1 < 0)?-1:1;
1261         d1 = (d1_0 < 0 || d1_1 < 0)?-1:1;
1262
1263         if (d0 < 0 && d1 < 0)
1264                 return 0;
1265
1266         if (d0 < 0)
1267                 return 1;
1268         else if (d1 < 0)
1269                 return -1;
1270         else
1271                 return 0;
1272
1273 }
1274
1275 int ssc_total=0,ssc_swaps=0;
1276
1277 //short the children of segment to render in the correct order
1278 //returns non-zero if swaps were made
1279 int sort_seg_children(segment *seg,int n_children,short *child_list)
1280 {
1281         int i,j;
1282         int r;
1283         int made_swaps,count;
1284
1285         if (n_children == 0) return 0;
1286
1287  ssc_total++;
1288
1289         //for each child,  compare with other children and see if order matters
1290         //if order matters, fix if wrong
1291
1292         count = 0;
1293
1294         do {
1295                 made_swaps = 0;
1296
1297                 for (i=0;i<n_children-1;i++)
1298                         for (j=i+1;child_list[i]!=-1 && j<n_children;j++)
1299                                 if (child_list[j]!=-1) {
1300                                         r = compare_children(seg,child_list[i],child_list[j]);
1301
1302                                         if (r == 1) {
1303                                                 int temp = child_list[i];
1304                                                 child_list[i] = child_list[j];
1305                                                 child_list[j] = temp;
1306                                                 made_swaps=1;
1307                                         }
1308                                 }
1309
1310         } while (made_swaps && ++count<n_children);
1311
1312  if (count)
1313   ssc_swaps++;
1314
1315         return count;
1316 }
1317
1318 void add_obj_to_seglist(int objnum,int listnum)
1319 {
1320         int i,checkn,marker;
1321
1322         checkn = listnum;
1323
1324         //first, find a slot
1325
1326 //mprintf((0,"adding obj %d to %d",objnum,listnum));
1327
1328         do {
1329
1330                 for (i=0;render_obj_list[checkn][i] >= 0;i++);
1331
1332                 Assert(i < OBJS_PER_SEG);
1333
1334                 marker = render_obj_list[checkn][i];
1335
1336                 if (marker != -1) {
1337                         checkn = -marker;
1338                         //Assert(checkn < MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS);
1339                         if (checkn >= MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS) {
1340                                 Int3();
1341                                 return;
1342                         }
1343                 }
1344
1345         } while (marker != -1);
1346
1347 //mprintf((0,"  slot %d,%d",checkn,i));
1348
1349
1350         //now we have found a slot.  put object in it
1351
1352         if (i != OBJS_PER_SEG-1) {
1353
1354                 render_obj_list[checkn][i] = objnum;
1355                 render_obj_list[checkn][i+1] = -1;
1356         }
1357         else {                          //chain to additional list
1358                 int lookn;
1359
1360                 //find an available sublist
1361
1362                 for (lookn=MAX_RENDER_SEGS;render_obj_list[lookn][0]!=-1 && lookn<MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS;lookn++);
1363
1364                 //Assert(lookn<MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS);
1365                 if (lookn >= MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS) {
1366                         Int3();
1367                         return;
1368                 }
1369
1370                 render_obj_list[checkn][i] = -lookn;
1371                 render_obj_list[lookn][0] = objnum;
1372                 render_obj_list[lookn][1] = -1;
1373
1374         }
1375
1376 //mprintf((0,"  added!\n"));
1377
1378 }
1379
1380 #define SORT_LIST_SIZE 100
1381
1382 typedef struct sort_item {
1383         int objnum;
1384         fix dist;
1385 } sort_item;
1386
1387 sort_item sort_list[SORT_LIST_SIZE];
1388 int n_sort_items;
1389
1390 //compare function for object sort.
1391 int sort_func(const sort_item *a,const sort_item *b)
1392 {
1393         fix delta_dist;
1394         object *obj_a,*obj_b;
1395
1396         delta_dist = a->dist - b->dist;
1397
1398         obj_a = &Objects[a->objnum];
1399         obj_b = &Objects[b->objnum];
1400
1401         if (abs(delta_dist) < (obj_a->size + obj_b->size)) {            //same position
1402
1403                 //these two objects are in the same position.  see if one is a fireball
1404                 //or laser or something that should plot on top.  Don't do this for
1405                 //the afterburner blobs, though.
1406
1407                 if (obj_a->type == OBJ_WEAPON || (obj_a->type == OBJ_FIREBALL && obj_a->id != VCLIP_AFTERBURNER_BLOB))
1408                         if (!(obj_b->type == OBJ_WEAPON || obj_b->type == OBJ_FIREBALL))
1409                                 return -1;      //a is weapon, b is not, so say a is closer
1410                         else;                           //both are weapons
1411                 else
1412                         if (obj_b->type == OBJ_WEAPON || (obj_b->type == OBJ_FIREBALL && obj_b->id != VCLIP_AFTERBURNER_BLOB))
1413                                 return 1;       //b is weapon, a is not, so say a is farther
1414
1415                 //no special case, fall through to normal return
1416         }
1417
1418         return delta_dist;      //return distance
1419 }
1420
1421 void build_object_lists(int n_segs)
1422 {
1423         int nn;
1424
1425 //mprintf((0,"build n_segs=%d",n_segs));
1426
1427         for (nn=0;nn<MAX_RENDER_SEGS+N_EXTRA_OBJ_LISTS;nn++)
1428                 render_obj_list[nn][0] = -1;
1429
1430         for (nn=0;nn<n_segs;nn++) {
1431                 int segnum;
1432
1433                 segnum = Render_list[nn];
1434
1435 //mprintf((0,"nn=%d seg=%d ",nn,segnum));
1436
1437                 if (segnum != -1) {
1438                         int objnum;
1439                         object *obj;
1440
1441                         for (objnum=Segments[segnum].objects;objnum!=-1;objnum = obj->next) {
1442                                 int new_segnum,did_migrate,list_pos;
1443
1444                                 obj = &Objects[objnum];
1445
1446                                 Assert( obj->segnum == segnum );
1447
1448                                 if (obj->flags & OF_ATTACHED)
1449                                         continue;               //ignore this object
1450
1451                                 new_segnum = segnum;
1452                                 list_pos = nn;
1453
1454 //mprintf((0,"objnum=%d ",objnum));
1455                                 if (obj->type != OBJ_CNTRLCEN && !(obj->type==OBJ_ROBOT && obj->id==65))                //don't migrate controlcen
1456                                 do {
1457                                         segmasks m;
1458
1459                                         did_migrate = 0;
1460
1461                                         m = get_seg_masks(&obj->pos,new_segnum,obj->size);
1462
1463                                         if (m.sidemask) {
1464                                                 int sn,sf;
1465
1466                                                 for (sn=0,sf=1;sn<6;sn++,sf<<=1)
1467                                                         if (m.sidemask & sf) {
1468                                                                 segment *seg = &Segments[new_segnum];
1469
1470                                                                 if (WALL_IS_DOORWAY(seg,sn) & WID_FLY_FLAG) {           //can explosion migrate through
1471                                                                         int child = seg->children[sn];
1472                                                                         int checknp;
1473
1474                                                                         for (checknp=list_pos;checknp--;)
1475                                                                                 if (Render_list[checknp] == child) {
1476 //mprintf((0,"mig from %d to %d ",new_segnum,child));
1477                                                                                         new_segnum = child;
1478                                                                                         list_pos = checknp;
1479                                                                                         did_migrate = 1;
1480                                                                                 }
1481                                                                 }
1482                                                         }
1483                                         }
1484
1485                                 } while (0);    //while (did_migrate);
1486
1487                                 add_obj_to_seglist(objnum,list_pos);
1488
1489                         }
1490
1491                 }
1492         }
1493
1494 //mprintf((0,"done build "));
1495
1496         //now that there's a list for each segment, sort the items in those lists
1497         for (nn=0;nn<n_segs;nn++) {
1498                 int segnum;
1499
1500                 segnum = Render_list[nn];
1501
1502 //mprintf((0,"nn=%d seg=%d ",nn,segnum));
1503
1504                 if (segnum != -1) {
1505                         int t,lookn,i,n;
1506
1507                         //first count the number of objects & copy into sort list
1508
1509                         lookn = nn;
1510                         i = n_sort_items = 0;
1511                         while ((t=render_obj_list[lookn][i++])!=-1)
1512                                 if (t<0)
1513                                         {lookn = -t; i=0;}
1514                                 else
1515                                         if (n_sort_items < SORT_LIST_SIZE-1) {          //add if room
1516                                                 sort_list[n_sort_items].objnum = t;
1517                                                 //NOTE: maybe use depth, not dist - quicker computation
1518                                                 sort_list[n_sort_items].dist = vm_vec_dist_quick(&Objects[t].pos,&Viewer_eye);
1519                                                 n_sort_items++;
1520                                         }
1521                                         else {                  //no room for object
1522                                                 int ii;
1523
1524                                                 #ifndef NDEBUG
1525                                                 FILE *tfile=fopen("sortlist.out","wt");
1526
1527                                                 //I find this strange, so I'm going to write out
1528                                                 //some information to look at later
1529                                                 if (tfile) {
1530                                                         for (ii=0;ii<SORT_LIST_SIZE;ii++) {
1531                                                                 int objnum = sort_list[ii].objnum;
1532
1533                                                                 fprintf(tfile,"Obj %3d  Type = %2d  Id = %2d  Dist = %08x  Segnum = %3d\n",
1534                                                                         objnum,Objects[objnum].type,Objects[objnum].id,sort_list[ii].dist,Objects[objnum].segnum);
1535                                                         }
1536                                                         fclose(tfile);
1537                                                 }
1538                                                 #endif
1539
1540                                                 Int3(); //Get Matt!!!
1541
1542                                                 //Now try to find a place for this object by getting rid
1543                                                 //of an object we don't care about
1544
1545                                                 for (ii=0;ii<SORT_LIST_SIZE;ii++) {
1546                                                         int objnum = sort_list[ii].objnum;
1547                                                         object *obj = &Objects[objnum];
1548                                                         int type = obj->type;
1549
1550                                                         //replace debris & fireballs
1551                                                         if (type == OBJ_DEBRIS || type == OBJ_FIREBALL) {
1552                                                                 fix dist = vm_vec_dist_quick(&Objects[t].pos,&Viewer_eye);
1553
1554                                                                 //don't replace same kind of object unless new
1555                                                                 //one is closer
1556
1557                                                                 if (Objects[t].type != type || dist < sort_list[ii].dist) {
1558                                                                         sort_list[ii].objnum = t;
1559                                                                         sort_list[ii].dist = dist;
1560                                                                         break;
1561                                                                 }
1562                                                         }
1563                                                 }
1564
1565                                                 Int3(); //still couldn't find a slot
1566                                         }
1567
1568
1569                         //now call qsort
1570                 #if defined(__WATCOMC__) || defined(MACINTOSH)
1571                         qsort(sort_list,n_sort_items,sizeof(*sort_list),
1572                                    sort_func);
1573                 #else
1574                         qsort(sort_list,n_sort_items,sizeof(*sort_list),
1575                                         (int (*)(const void*,const void*))sort_func);
1576                 #endif
1577
1578                         //now copy back into list
1579
1580                         lookn = nn;
1581                         i = 0;
1582                         n = n_sort_items;
1583                         while ((t=render_obj_list[lookn][i])!=-1 && n>0)
1584                                 if (t<0)
1585                                         {lookn = -t; i=0;}
1586                                 else
1587                                         render_obj_list[lookn][i++] = sort_list[--n].objnum;
1588                         render_obj_list[lookn][i] = -1; //mark (possibly new) end
1589                 }
1590         }
1591 }
1592
1593 int Use_player_head_angles = 0;
1594 vms_angvec Player_head_angles;
1595
1596 extern int Num_tmaps_drawn;
1597 extern int Total_pixels;
1598 //--unused-- int Total_num_tmaps_drawn=0;
1599
1600 int Rear_view=0;
1601 extern ubyte RenderingType;
1602
1603 void start_lighting_frame(object *viewer);
1604
1605 #ifdef JOHN_ZOOM
1606 fix Zoom_factor=F1_0;
1607 #endif
1608 //renders onto current canvas
1609 void render_frame(fix eye_offset, int window_num)
1610 {
1611         int start_seg_num;
1612
1613 #if defined(POLY_ACC)
1614 //$$ not needed for Verite, probably optional for ViRGE.    pa_flush();
1615 #endif
1616
1617 //Total_num_tmaps_drawn += Num_tmaps_drawn;
1618 //if ((FrameCount > 0) && (Total_num_tmaps_drawn))
1619 //      mprintf((0, "Frame: %4i, total = %6i, Avg = %7.3f, Avgpix=%7.3f\n", Num_tmaps_drawn, Total_num_tmaps_drawn, (float) Total_num_tmaps_drawn/FrameCount, (float) Total_pixels/Total_num_tmaps_drawn));
1620 //Num_tmaps_drawn = 0;
1621
1622         if (Endlevel_sequence) {
1623                 render_endlevel_frame(eye_offset);
1624                 FrameCount++;
1625                 return;
1626         }
1627
1628 #ifdef NEWDEMO
1629         if ( Newdemo_state == ND_STATE_RECORDING && eye_offset >= 0 )   {
1630
1631           //    mprintf ((0,"Objnum=%d objtype=%d objid=%d\n",Viewer-Objects,Viewer->type,Viewer->id));
1632
1633       if (RenderingType==0)
1634                 newdemo_record_start_frame(FrameCount, FrameTime );
1635       if (RenderingType!=255)
1636                 newdemo_record_viewer_object(Viewer);
1637         }
1638 #endif
1639
1640    //Here:
1641
1642         start_lighting_frame(Viewer);           //this is for ugly light-smoothing hack
1643
1644         g3_start_frame();
1645
1646         Viewer_eye = Viewer->pos;
1647
1648 //      if (Viewer->type == OBJ_PLAYER && (Cockpit_mode!=CM_REAR_VIEW))
1649 //              vm_vec_scale_add2(&Viewer_eye,&Viewer->orient.fvec,(Viewer->size*3)/4);
1650
1651         if (eye_offset) {
1652                 vm_vec_scale_add2(&Viewer_eye,&Viewer->orient.rvec,eye_offset);
1653         }
1654
1655         #ifdef EDITOR
1656         if (Function_mode==FMODE_EDITOR)
1657                 Viewer_eye = Viewer->pos;
1658         #endif
1659
1660         start_seg_num = find_point_seg(&Viewer_eye,Viewer->segnum);
1661
1662         if (start_seg_num==-1)
1663                 start_seg_num = Viewer->segnum;
1664
1665         if (Viewer==ConsoleObject && Use_player_head_angles) {
1666                 vms_matrix headm,viewm;
1667                 vm_angles_2_matrix(&headm,&Player_head_angles);
1668                 vm_matrix_x_matrix(&viewm,&Viewer->orient,&headm);
1669                 g3_set_view_matrix(&Viewer_eye,&viewm,Render_zoom);
1670         //@@} else if ((Cockpit_mode==CM_REAR_VIEW) && (Viewer==ConsoleObject)) {
1671         } else if (Rear_view && (Viewer==ConsoleObject)) {
1672                 vms_matrix headm,viewm;
1673                 Player_head_angles.p = Player_head_angles.b = 0;
1674                 Player_head_angles.h = 0x7fff;
1675                 vm_angles_2_matrix(&headm,&Player_head_angles);
1676                 vm_matrix_x_matrix(&viewm,&Viewer->orient,&headm);
1677                 g3_set_view_matrix(&Viewer_eye,&viewm,Render_zoom);
1678         } else  {
1679 #ifdef JOHN_ZOOM
1680                 if (keyd_pressed[KEY_RSHIFT] )  {
1681                         Zoom_factor += FrameTime*4;
1682                         if (Zoom_factor > F1_0*5 ) Zoom_factor=F1_0*5;
1683                 } else {
1684                         Zoom_factor -= FrameTime*4;
1685                         if (Zoom_factor < F1_0 ) Zoom_factor = F1_0;
1686                 }
1687                 g3_set_view_matrix(&Viewer_eye,&Viewer->orient,fixdiv(Render_zoom,Zoom_factor));
1688 #else
1689                 g3_set_view_matrix(&Viewer_eye,&Viewer->orient,Render_zoom);
1690 #endif
1691         }
1692
1693         if (Clear_window == 1) {
1694                 if (Clear_window_color == -1)
1695                         Clear_window_color = BM_XRGB(0, 0, 0);  //BM_XRGB(31, 15, 7);
1696                 gr_clear_canvas(Clear_window_color);
1697         }
1698         #ifndef NDEBUG
1699         if (Show_only_curside)
1700                 gr_clear_canvas(Clear_window_color);
1701         #endif
1702
1703         render_mine(start_seg_num, eye_offset, window_num);
1704
1705         if (Use_player_head_angles )
1706                 draw_3d_reticle(eye_offset);
1707
1708         g3_end_frame();
1709
1710    //RenderingType=0;
1711
1712         // -- Moved from here by MK, 05/17/95, wrong if multiple renders/frame! FrameCount++;           //we have rendered a frame
1713 }
1714
1715 int first_terminal_seg;
1716
1717 void update_rendered_data(int window_num, object *viewer, int rear_view_flag, int user)
1718 {
1719         Assert(window_num < MAX_RENDERED_WINDOWS);
1720         Window_rendered_data[window_num].frame = FrameCount;
1721         Window_rendered_data[window_num].viewer = viewer;
1722         Window_rendered_data[window_num].rear_view = rear_view_flag;
1723         Window_rendered_data[window_num].user = user;
1724 }
1725
1726 //build a list of segments to be rendered
1727 //fills in Render_list & N_render_segs
1728 void build_segment_list(int start_seg_num, int window_num)
1729 {
1730         int     lcnt,scnt,ecnt;
1731         int     l,c;
1732         int     ch;
1733
1734         memset(visited, 0, sizeof(visited[0])*(Highest_segment_index+1));
1735         memset(render_pos, -1, sizeof(render_pos[0])*(Highest_segment_index+1));
1736         //memset(no_render_flag, 0, sizeof(no_render_flag[0])*(MAX_RENDER_SEGS));
1737         memset(processed, 0, sizeof(processed));
1738
1739         #ifndef NDEBUG
1740         memset(visited2, 0, sizeof(visited2[0])*(Highest_segment_index+1));
1741         #endif
1742
1743         lcnt = scnt = 0;
1744
1745         Render_list[lcnt] = start_seg_num; visited[start_seg_num]=1;
1746         Seg_depth[lcnt] = 0;
1747         lcnt++;
1748         ecnt = lcnt;
1749         render_pos[start_seg_num] = 0;
1750
1751         #ifndef NDEBUG
1752         if (pre_draw_segs)
1753                 render_segment(start_seg_num, window_num);
1754         #endif
1755
1756         render_windows[0].left=render_windows[0].top=0;
1757         render_windows[0].right=grd_curcanv->cv_bitmap.bm_w-1;
1758         render_windows[0].bot=grd_curcanv->cv_bitmap.bm_h-1;
1759
1760         //breadth-first renderer
1761
1762         //build list
1763
1764         for (l=0;l<Render_depth;l++) {
1765
1766                 //while (scnt < ecnt) {
1767                 for (scnt=0;scnt < ecnt;scnt++) {
1768                         int rotated,segnum;
1769                         window *check_w;
1770                         short child_list[MAX_SIDES_PER_SEGMENT];                //list of ordered sides to process
1771                         int n_children;                                                                         //how many sides in child_list
1772                         segment *seg;
1773
1774                         if (processed[scnt])
1775                                 continue;
1776
1777                         processed[scnt]=1;
1778
1779                         segnum = Render_list[scnt];
1780                         check_w = &render_windows[scnt];
1781
1782                         #ifndef NDEBUG
1783                         if (draw_boxes)
1784                                 draw_window_box(RED,check_w->left,check_w->top,check_w->right,check_w->bot);
1785                         #endif
1786
1787                         if (segnum == -1) continue;
1788
1789                         seg = &Segments[segnum];
1790                         rotated=0;
1791
1792                         //look at all sides of this segment.
1793                         //tricky code to look at sides in correct order follows
1794
1795                         for (c=n_children=0;c<MAX_SIDES_PER_SEGMENT;c++) {              //build list of sides
1796                                 int wid;
1797
1798                                 wid = WALL_IS_DOORWAY(seg, c);
1799
1800                                 ch=seg->children[c];
1801
1802                                 if ( (window_check || !visited[ch]) && (wid & WID_RENDPAST_FLAG) ) {
1803                                         if (behind_check) {
1804                                                 byte *sv = Side_to_verts[c];
1805                                                 ubyte codes_and=0xff;
1806                                                 int i;
1807
1808                                                 rotate_list(8,seg->verts);
1809                                                 rotated=1;
1810
1811                                                 for (i=0;i<4;i++)
1812                                                         codes_and &= Segment_points[seg->verts[sv[i]]].p3_codes;
1813
1814                                                 if (codes_and & CC_BEHIND) continue;
1815
1816                                         }
1817                                         child_list[n_children++] = c;
1818                                 }
1819                         }
1820
1821                         //now order the sides in some magical way
1822
1823                         if (new_seg_sorting)
1824                                 sort_seg_children(seg,n_children,child_list);
1825
1826                         //for (c=0;c<MAX_SIDES_PER_SEGMENT;c++) {
1827                         //      ch=seg->children[c];
1828
1829                         for (c=0;c<n_children;c++) {
1830                                 int siden;
1831
1832                                 siden = child_list[c];
1833                                 ch=seg->children[siden];
1834                                 //if ( (window_check || !visited[ch])&& (WALL_IS_DOORWAY(seg, c))) {
1835                                 {
1836                                         if (window_check) {
1837                                                 int i;
1838                                                 ubyte codes_and_3d,codes_and_2d;
1839                                                 short _x,_y,min_x=32767,max_x=-32767,min_y=32767,max_y=-32767;
1840                                                 int no_proj_flag=0;     //a point wasn't projected
1841
1842                                                 if (rotated<2) {
1843                                                         if (!rotated)
1844                                                                 rotate_list(8,seg->verts);
1845                                                         project_list(8,seg->verts);
1846                                                         rotated=2;
1847                                                 }
1848
1849                                                 for (i=0,codes_and_3d=codes_and_2d=0xff;i<4;i++) {
1850                                                         int p = seg->verts[Side_to_verts[siden][i]];
1851                                                         g3s_point *pnt = &Segment_points[p];
1852
1853                                                         if (! (pnt->p3_flags&PF_PROJECTED)) {no_proj_flag=1; break;}
1854
1855                                                         _x = f2i(pnt->p3_sx);
1856                                                         _y = f2i(pnt->p3_sy);
1857
1858                                                         codes_and_3d &= pnt->p3_codes;
1859                                                         codes_and_2d &= code_window_point(_x,_y,check_w);
1860
1861                                                         #ifndef NDEBUG
1862                                                         if (draw_edges) {
1863                                                                 gr_setcolor(BM_XRGB(31,0,31));
1864                                                                 gr_line(pnt->p3_sx,pnt->p3_sy,
1865                                                                         Segment_points[seg->verts[Side_to_verts[siden][(i+1)%4]]].p3_sx,
1866                                                                         Segment_points[seg->verts[Side_to_verts[siden][(i+1)%4]]].p3_sy);
1867                                                         }
1868                                                         #endif
1869
1870                                                         if (_x < min_x) min_x = _x;
1871                                                         if (_x > max_x) max_x = _x;
1872
1873                                                         if (_y < min_y) min_y = _y;
1874                                                         if (_y > max_y) max_y = _y;
1875
1876                                                 }
1877
1878                                                 #ifndef NDEBUG
1879                                                 if (draw_boxes)
1880                                                         draw_window_box(WHITE,min_x,min_y,max_x,max_y);
1881                                                 #endif
1882
1883                                                 if (no_proj_flag || (!codes_and_3d && !codes_and_2d)) { //maybe add this segment
1884                                                         int rp = render_pos[ch];
1885                                                         window *new_w = &render_windows[lcnt];
1886
1887                                                         if (no_proj_flag) *new_w = *check_w;
1888                                                         else {
1889                                                                 new_w->left  = max(check_w->left,min_x);
1890                                                                 new_w->right = min(check_w->right,max_x);
1891                                                                 new_w->top   = max(check_w->top,min_y);
1892                                                                 new_w->bot   = min(check_w->bot,max_y);
1893                                                         }
1894
1895                                                         //see if this seg already visited, and if so, does current window
1896                                                         //expand the old window?
1897                                                         if (rp != -1) {
1898                                                                 if (new_w->left < render_windows[rp].left ||
1899                                                                                  new_w->top < render_windows[rp].top ||
1900                                                                                  new_w->right > render_windows[rp].right ||
1901                                                                                  new_w->bot > render_windows[rp].bot) {
1902
1903                                                                         new_w->left  = min(new_w->left,render_windows[rp].left);
1904                                                                         new_w->right = max(new_w->right,render_windows[rp].right);
1905                                                                         new_w->top   = min(new_w->top,render_windows[rp].top);
1906                                                                         new_w->bot   = max(new_w->bot,render_windows[rp].bot);
1907
1908                                                                         if (no_migrate_segs) {
1909                                                                                 //no_render_flag[lcnt] = 1;
1910                                                                                 Render_list[lcnt] = -1;
1911                                                                                 render_windows[rp] = *new_w;            //get updated window
1912                                                                                 processed[rp] = 0;              //force reprocess
1913                                                                                 goto no_add;
1914                                                                         }
1915                                                                         else
1916                                                                                 Render_list[rp]=-1;
1917                                                                 }
1918                                                                 else goto no_add;
1919                                                         }
1920
1921                                                         #ifndef NDEBUG
1922                                                         if (draw_boxes)
1923                                                                 draw_window_box(5,new_w->left,new_w->top,new_w->right,new_w->bot);
1924                                                         #endif
1925
1926                                                         render_pos[ch] = lcnt;
1927                                                         Render_list[lcnt] = ch;
1928                                                         Seg_depth[lcnt] = l;
1929                                                         lcnt++;
1930                                                         if (lcnt >= MAX_RENDER_SEGS) {mprintf((0,"Too many segs in render list!!\n")); goto done_list;}
1931                                                         visited[ch] = 1;
1932
1933                                                         #ifndef NDEBUG
1934                                                         if (pre_draw_segs)
1935                                                                 render_segment(ch, window_num);
1936                                                         #endif
1937 no_add:
1938         ;
1939
1940                                                 }
1941                                         }
1942                                         else {
1943                                                 Render_list[lcnt] = ch;
1944                                                 Seg_depth[lcnt] = l;
1945                                                 lcnt++;
1946                                                 if (lcnt >= MAX_RENDER_SEGS) {mprintf((0,"Too many segs in render list!!\n")); goto done_list;}
1947                                                 visited[ch] = 1;
1948                                         }
1949                                 }
1950                         }
1951                 }
1952
1953                 scnt = ecnt;
1954                 ecnt = lcnt;
1955
1956         }
1957 done_list:
1958
1959         lcnt_save = lcnt;
1960         scnt_save = scnt;
1961
1962         first_terminal_seg = scnt;
1963         N_render_segs = lcnt;
1964
1965 }
1966
1967 //renders onto current canvas
1968 void render_mine(int start_seg_num,fix eye_offset, int window_num)
1969 {
1970 #ifndef NDEBUG
1971         int             i;
1972 #endif
1973         int             nn;
1974
1975         //      Initialize number of objects (actually, robots!) rendered this frame.
1976         Window_rendered_data[window_num].num_objects = 0;
1977
1978 #ifdef LASER_HACK
1979         Hack_nlasers = 0;
1980 #endif
1981
1982         #ifndef NDEBUG
1983         for (i=0;i<=Highest_object_index;i++)
1984                 object_rendered[i] = 0;
1985         #endif
1986
1987         //set up for rendering
1988
1989         render_start_frame();
1990
1991
1992         #if defined(EDITOR) && !defined(NDEUBG)
1993         if (Show_only_curside) {
1994                 rotate_list(8,Cursegp->verts);
1995                 render_side(Cursegp,Curside);
1996                 goto done_rendering;
1997         }
1998         #endif
1999
2000
2001         #ifdef EDITOR
2002         if (_search_mode)       {
2003                 //lcnt = lcnt_save;
2004                 //scnt = scnt_save;
2005         }
2006         else
2007         #endif
2008                 //NOTE LINK TO ABOVE!!
2009                 build_segment_list(start_seg_num, window_num);          //fills in Render_list & N_render_segs
2010
2011         //render away
2012
2013         #ifndef NDEBUG
2014         if (!window_check) {
2015                 Window_clip_left  = Window_clip_top = 0;
2016                 Window_clip_right = grd_curcanv->cv_bitmap.bm_w-1;
2017                 Window_clip_bot   = grd_curcanv->cv_bitmap.bm_h-1;
2018         }
2019         #endif
2020
2021         #ifndef NDEBUG
2022         if (!(_search_mode)) {
2023                 int i;
2024
2025                 for (i=0;i<N_render_segs;i++) {
2026                         int segnum;
2027
2028                         segnum = Render_list[i];
2029
2030                         if (segnum != -1)
2031                         {
2032                                 if (visited2[segnum])
2033                                         Int3();         //get Matt
2034                                 else
2035                                         visited2[segnum] = 1;
2036                         }
2037                 }
2038         }
2039         #endif
2040
2041         if (!(_search_mode))
2042                 build_object_lists(N_render_segs);
2043
2044         if (eye_offset<=0)              // Do for left eye or zero.
2045                 set_dynamic_light();
2046
2047         if (!_search_mode && Clear_window == 2) {
2048                 if (first_terminal_seg < N_render_segs) {
2049                         int i;
2050
2051                         if (Clear_window_color == -1)
2052                                 Clear_window_color = BM_XRGB(0, 0, 0);  //BM_XRGB(31, 15, 7);
2053
2054                         gr_setcolor(Clear_window_color);
2055
2056                         for (i=first_terminal_seg; i<N_render_segs; i++) {
2057                                 if (Render_list[i] != -1) {
2058                                         #ifndef NDEBUG
2059                                         if ((render_windows[i].left == -1) || (render_windows[i].top == -1) || (render_windows[i].right == -1) || (render_windows[i].bot == -1))
2060                                                 Int3();
2061                                         else
2062                                         #endif
2063                                                 //NOTE LINK TO ABOVE!
2064                                                 gr_rect(render_windows[i].left, render_windows[i].top, render_windows[i].right, render_windows[i].bot);
2065                                 }
2066                         }
2067                 }
2068         }
2069
2070         for (nn=N_render_segs;nn--;) {
2071                 int segnum;
2072                 int objnp;
2073
2074                 // Interpolation_method = 0;
2075                 segnum = Render_list[nn];
2076                 Current_seg_depth = Seg_depth[nn];
2077
2078                 //if (!no_render_flag[nn])
2079                 if (segnum!=-1 && (_search_mode || visited[segnum]!=-1)) {
2080                         //set global render window vars
2081
2082                         if (window_check) {
2083                                 Window_clip_left  = render_windows[nn].left;
2084                                 Window_clip_top   = render_windows[nn].top;
2085                                 Window_clip_right = render_windows[nn].right;
2086                                 Window_clip_bot   = render_windows[nn].bot;
2087                         }
2088
2089                         //mprintf((0," %d",segnum));
2090
2091                         render_segment(segnum, window_num);
2092                         visited[segnum]=255;
2093
2094                         if (window_check) {             //reset for objects
2095                                 Window_clip_left  = Window_clip_top = 0;
2096                                 Window_clip_right = grd_curcanv->cv_bitmap.bm_w-1;
2097                                 Window_clip_bot   = grd_curcanv->cv_bitmap.bm_h-1;
2098                         }
2099
2100                         if (migrate_objects) {
2101                                 //int n_expl_objs=0,expl_objs[5],i;
2102                                 int listnum;
2103                                 int save_linear_depth = Max_linear_depth;
2104
2105                                 Max_linear_depth = Max_linear_depth_objects;
2106
2107                                 listnum = nn;
2108
2109                                 //mprintf((0,"render objs seg %d",segnum));
2110
2111                                 for (objnp=0;render_obj_list[listnum][objnp]!=-1;)      {
2112                                         int ObjNumber = render_obj_list[listnum][objnp];
2113
2114                                         if (ObjNumber >= 0) {
2115
2116                                                 //mprintf( (0, "Type: %d\n", Objects[ObjNumber].type ));
2117
2118                                                 //if (Objects[ObjNumber].type == OBJ_FIREBALL && n_expl_objs<5) {
2119                                                 //      expl_objs[n_expl_objs++] = ObjNumber;
2120                                                 //} else
2121                                                 #ifdef LASER_HACK
2122                                                 if (    (Objects[ObjNumber].type==OBJ_WEAPON) &&                                                                //if its a weapon
2123                                                                 (Objects[ObjNumber].lifeleft==Laser_max_time ) &&       //  and its in it's first frame
2124                                                                 (Hack_nlasers< MAX_HACKED_LASERS) &&                                                                    //  and we have space for it
2125                                                                 (Objects[ObjNumber].laser_info.parent_num>-1) &&                                        //  and it has a parent
2126                                                                 ((Viewer-Objects)==Objects[ObjNumber].laser_info.parent_num)    //  and it's parent is the viewer
2127                                                    )            {
2128                                                         Hack_laser_list[Hack_nlasers++] = ObjNumber;                                                            //then make it draw after everything else.
2129                                                         //mprintf( (0, "O%d ", ObjNumber ));
2130                                                 } else
2131                                                 #endif
2132                                                         do_render_object(ObjNumber, window_num);        // note link to above else
2133
2134                                                 objnp++;
2135                                         }
2136                                         else {
2137
2138                                                 listnum = -ObjNumber;
2139                                                 objnp = 0;
2140
2141                                         }
2142
2143                                 }
2144
2145                                 //for (i=0;i<n_expl_objs;i++)
2146                                 //      do_render_object(expl_objs[i], window_num);
2147
2148                                 //mprintf((0,"done seg %d\n",segnum));
2149
2150                                 Max_linear_depth = save_linear_depth;
2151
2152                         }
2153
2154                 }
2155         }
2156
2157         //mprintf((0,"\n"));
2158
2159
2160 #ifdef LASER_HACK
2161         // Draw the hacked lasers last
2162         for (i=0; i < Hack_nlasers; i++ )       {
2163                 //mprintf( (0, "D%d ", Hack_laser_list[i] ));
2164                 do_render_object(Hack_laser_list[i], window_num);
2165         }
2166 #endif
2167
2168         // -- commented out by mk on 09/14/94...did i do a good thing??  object_render_targets();
2169
2170 #ifdef EDITOR
2171         #ifndef NDEUBG
2172         //draw curedge stuff
2173         if (Outline_mode) outline_seg_side(Cursegp,Curside,Curedge,Curvert);
2174         #endif
2175
2176 done_rendering:
2177         ;
2178
2179 #endif
2180
2181 }
2182 #ifdef EDITOR
2183
2184 extern int render_3d_in_big_window;
2185
2186 //finds what segment is at a given x&y -  seg,side,face are filled in
2187 //works on last frame rendered. returns true if found
2188 //if seg<0, then an object was found, and the object number is -seg-1
2189 int find_seg_side_face(short x,short y,int *seg,int *side,int *face,int *poly)
2190 {
2191         _search_mode = -1;
2192
2193         _search_x = x; _search_y = y;
2194
2195         found_seg = -1;
2196
2197         if (render_3d_in_big_window) {
2198                 grs_canvas temp_canvas;
2199
2200                 gr_init_sub_canvas(&temp_canvas,canv_offscreen,0,0,
2201                         LargeView.ev_canv->cv_bitmap.bm_w,LargeView.ev_canv->cv_bitmap.bm_h);
2202
2203                 gr_set_current_canvas(&temp_canvas);
2204
2205                 render_frame(0, 0);
2206         }
2207         else {
2208                 gr_set_current_canvas(&VR_render_sub_buffer[0]);        //render off-screen
2209                 render_frame(0, 0);
2210         }
2211
2212         _search_mode = 0;
2213
2214         *seg = found_seg;
2215         *side = found_side;
2216         *face = found_face;
2217         *poly = found_poly;
2218
2219 //      mprintf((0,"found seg=%d, side=%d, face=%d, poly=%d\n",found_seg,found_side,found_face,found_poly));
2220
2221         return (found_seg!=-1);
2222
2223 }
2224
2225 #endif