Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 1115 lines (1065 sloc) 31.5 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/

#include "qbsp.h"
#include "l_bsp_hl.h"
#include "aas_map.h" //AAS_CreateMapBrushes

int hl_numbrushes;
int hl_numclipbrushes;

//#define HL_PRINT
#define HLCONTENTS

//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int HL_TextureContents(char *name)
{
if (!Q_strncasecmp (name, "sky",3))
return CONTENTS_SOLID;

if (!Q_strncasecmp(name+1,"!lava",5))
return CONTENTS_LAVA;

if (!Q_strncasecmp(name+1,"!slime",6))
return CONTENTS_SLIME;

/*
if (!Q_strncasecmp (name, "!cur_90",7))
return CONTENTS_CURRENT_90;
if (!Q_strncasecmp (name, "!cur_0",6))
return CONTENTS_CURRENT_0;
if (!Q_strncasecmp (name, "!cur_270",8))
return CONTENTS_CURRENT_270;
if (!Q_strncasecmp (name, "!cur_180",8))
return CONTENTS_CURRENT_180;
if (!Q_strncasecmp (name, "!cur_up",7))
return CONTENTS_CURRENT_UP;
if (!Q_strncasecmp (name, "!cur_dwn",8))
return CONTENTS_CURRENT_DOWN;
//*/
if (name[0] == '!')
return CONTENTS_WATER;
/*
if (!Q_strncasecmp (name, "origin",6))
return CONTENTS_ORIGIN;
if (!Q_strncasecmp (name, "clip",4))
return CONTENTS_CLIP;
if( !Q_strncasecmp( name, "translucent", 11 ) )
return CONTENTS_TRANSLUCENT;
if( name[0] == '@' )
return CONTENTS_TRANSLUCENT;
//*/

return CONTENTS_SOLID;
} //end of the function HL_TextureContents
//===========================================================================
// Generates two new brushes, leaving the original
// unchanged
//
// modified for Half-Life because there are quite a lot of tiny node leaves
// in the Half-Life bsps
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_SplitBrush(bspbrush_t *brush, int planenum, int nodenum,
bspbrush_t **front, bspbrush_t **back)
{
bspbrush_t *b[2];
int i, j;
winding_t *w, *cw[2], *midwinding;
plane_t *plane, *plane2;
side_t *s, *cs;
float d, d_front, d_back;

*front = *back = NULL;
plane = &mapplanes[planenum];

// check all points
d_front = d_back = 0;
for (i=0 ; i<brush->numsides ; i++)
{
w = brush->sides[i].winding;
if (!w)
continue;
for (j=0 ; j<w->numpoints ; j++)
{
d = DotProduct (w->p[j], plane->normal) - plane->dist;
if (d > 0 && d > d_front)
d_front = d;
if (d < 0 && d < d_back)
d_back = d;
} //end for
} //end for

if (d_front < 0.1) // PLANESIDE_EPSILON)
{ // only on back
*back = CopyBrush (brush);
Log_Print("HL_SplitBrush: only on back\n");
return;
} //end if
if (d_back > -0.1) // PLANESIDE_EPSILON)
{ // only on front
*front = CopyBrush (brush);
Log_Print("HL_SplitBrush: only on front\n");
return;
} //end if

// create a new winding from the split plane

w = BaseWindingForPlane (plane->normal, plane->dist);
for (i = 0; i < brush->numsides && w; i++)
{
plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
ChopWindingInPlace(&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
} //end for

if (!w || WindingIsTiny(w))
{ // the brush isn't really split
int side;

Log_Print("HL_SplitBrush: no split winding\n");
side = BrushMostlyOnSide (brush, plane);
if (side == PSIDE_FRONT)
*front = CopyBrush (brush);
if (side == PSIDE_BACK)
*back = CopyBrush (brush);
return;
}

if (WindingIsHuge(w))
{
Log_Print("HL_SplitBrush: WARNING huge split winding\n");
} //end of

midwinding = w;

// split it for real

for (i = 0; i < 2; i++)
{
b[i] = AllocBrush (brush->numsides+1);
b[i]->original = brush->original;
} //end for

// split all the current windings

for (i=0 ; i<brush->numsides ; i++)
{
s = &brush->sides[i];
w = s->winding;
if (!w)
continue;
ClipWindingEpsilon (w, plane->normal, plane->dist,
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
for (j=0 ; j<2 ; j++)
{
if (!cw[j])
continue;
#if 0
if (WindingIsTiny (cw[j]))
{
FreeWinding (cw[j]);
continue;
}
#endif
cs = &b[j]->sides[b[j]->numsides];
b[j]->numsides++;
*cs = *s;
// cs->planenum = s->planenum;
// cs->texinfo = s->texinfo;
// cs->visible = s->visible;
// cs->original = s->original;
cs->winding = cw[j];
cs->flags &= ~SFL_TESTED;
} //end for
} //end for


// see if we have valid polygons on both sides

for (i=0 ; i<2 ; i++)
{
BoundBrush (b[i]);
for (j=0 ; j<3 ; j++)
{
if (b[i]->mins[j] < -4096 || b[i]->maxs[j] > 4096)
{
Log_Print("HL_SplitBrush: bogus brush after clip\n");
break;
} //end if
} //end for

if (b[i]->numsides < 3 || j < 3)
{
FreeBrush (b[i]);
b[i] = NULL;
Log_Print("HL_SplitBrush: numsides < 3\n");
} //end if
} //end for

if ( !(b[0] && b[1]) )
{
if (!b[0] && !b[1])
Log_Print("HL_SplitBrush: split removed brush\n");
else
Log_Print("HL_SplitBrush: split not on both sides\n");
if (b[0])
{
FreeBrush (b[0]);
*front = CopyBrush (brush);
} //end if
if (b[1])
{
FreeBrush (b[1]);
*back = CopyBrush (brush);
} //end if
return;
} //end if

// add the midwinding to both sides
for (i = 0; i < 2; i++)
{
cs = &b[i]->sides[b[i]->numsides];
b[i]->numsides++;

cs->planenum = planenum^i^1;
cs->texinfo = 0;
//store the node number in the surf to find the texinfo later on
cs->surf = nodenum;
//
cs->flags &= ~SFL_VISIBLE;
cs->flags &= ~SFL_TESTED;
if (i==0)
cs->winding = CopyWinding (midwinding);
else
cs->winding = midwinding;
} //end for


{
vec_t v1;
int i;

for (i=0 ; i<2 ; i++)
{
v1 = BrushVolume (b[i]);
if (v1 < 1)
{
FreeBrush (b[i]);
b[i] = NULL;
Log_Print("HL_SplitBrush: tiny volume after clip\n");
} //end if
} //end for
} //*/

*front = b[0];
*back = b[1];
} //end of the function HL_SplitBrush
//===========================================================================
// returns true if the tree starting at nodenum has only solid leaves
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int HL_SolidTree_r(int nodenum)
{
if (nodenum < 0)
{
switch(hl_dleafs[(-nodenum) - 1].contents)
{
case HL_CONTENTS_EMPTY:
{
return false;
} //end case
case HL_CONTENTS_SOLID:
#ifdef HLCONTENTS
case HL_CONTENTS_CLIP:
#endif //HLCONTENTS
case HL_CONTENTS_SKY:
#ifdef HLCONTENTS
case HL_CONTENTS_TRANSLUCENT:
#endif //HLCONTENTS
{
return true;
} //end case
case HL_CONTENTS_WATER:
case HL_CONTENTS_SLIME:
case HL_CONTENTS_LAVA:
#ifdef HLCONTENTS
//these contents should not be found in the BSP
case HL_CONTENTS_ORIGIN:
case HL_CONTENTS_CURRENT_0:
case HL_CONTENTS_CURRENT_90:
case HL_CONTENTS_CURRENT_180:
case HL_CONTENTS_CURRENT_270:
case HL_CONTENTS_CURRENT_UP:
case HL_CONTENTS_CURRENT_DOWN:
#endif //HLCONTENTS
default:
{
return false;
} //end default
} //end switch
return false;
} //end if
if (!HL_SolidTree_r(hl_dnodes[nodenum].children[0])) return false;
if (!HL_SolidTree_r(hl_dnodes[nodenum].children[1])) return false;
return true;
} //end of the function HL_SolidTree_r
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *HL_CreateBrushes_r(bspbrush_t *brush, int nodenum)
{
int planenum;
bspbrush_t *front, *back;
hl_dleaf_t *leaf;

//if it is a leaf
if (nodenum < 0)
{
leaf = &hl_dleafs[(-nodenum) - 1];
if (leaf->contents != HL_CONTENTS_EMPTY)
{
#ifdef HL_PRINT
qprintf("\r%5i", ++hl_numbrushes);
#endif //HL_PRINT
} //end if
switch(leaf->contents)
{
case HL_CONTENTS_EMPTY:
{
FreeBrush(brush);
return NULL;
} //end case
case HL_CONTENTS_SOLID:
#ifdef HLCONTENTS
case HL_CONTENTS_CLIP:
#endif //HLCONTENTS
case HL_CONTENTS_SKY:
#ifdef HLCONTENTS
case HL_CONTENTS_TRANSLUCENT:
#endif //HLCONTENTS
{
brush->side = CONTENTS_SOLID;
return brush;
} //end case
case HL_CONTENTS_WATER:
{
brush->side = CONTENTS_WATER;
return brush;
} //end case
case HL_CONTENTS_SLIME:
{
brush->side = CONTENTS_SLIME;
return brush;
} //end case
case HL_CONTENTS_LAVA:
{
brush->side = CONTENTS_LAVA;
return brush;
} //end case
#ifdef HLCONTENTS
//these contents should not be found in the BSP
case HL_CONTENTS_ORIGIN:
case HL_CONTENTS_CURRENT_0:
case HL_CONTENTS_CURRENT_90:
case HL_CONTENTS_CURRENT_180:
case HL_CONTENTS_CURRENT_270:
case HL_CONTENTS_CURRENT_UP:
case HL_CONTENTS_CURRENT_DOWN:
{
Error("HL_CreateBrushes_r: found contents %d in Half-Life BSP", leaf->contents);
return NULL;
} //end case
#endif //HLCONTENTS
default:
{
Error("HL_CreateBrushes_r: unknown contents %d in Half-Life BSP", leaf->contents);
return NULL;
} //end default
} //end switch
return NULL;
} //end if
//if the rest of the tree is solid
/*if (HL_SolidTree_r(nodenum))
{
brush->side = CONTENTS_SOLID;
return brush;
} //end if*/
//
planenum = hl_dnodes[nodenum].planenum;
planenum = FindFloatPlane(hl_dplanes[planenum].normal, hl_dplanes[planenum].dist);
//split the brush with the node plane
HL_SplitBrush(brush, planenum, nodenum, &front, &back);
//free the original brush
FreeBrush(brush);
//every node must split the brush in two
if (!front || !back)
{
Log_Print("HL_CreateBrushes_r: WARNING node not splitting brush\n");
//return NULL;
} //end if
//create brushes recursively
if (front) front = HL_CreateBrushes_r(front, hl_dnodes[nodenum].children[0]);
if (back) back = HL_CreateBrushes_r(back, hl_dnodes[nodenum].children[1]);
//link the brushes if possible and return them
if (front)
{
for (brush = front; brush->next; brush = brush->next);
brush->next = back;
return front;
} //end if
else
{
return back;
} //end else
} //end of the function HL_CreateBrushes_r
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *HL_CreateBrushesFromBSP(int modelnum)
{
bspbrush_t *brushlist;
bspbrush_t *brush;
hl_dnode_t *headnode;
vec3_t mins, maxs;
int i;

//
headnode = &hl_dnodes[hl_dmodels[modelnum].headnode[0]];
//get the mins and maxs of the world
VectorCopy(headnode->mins, mins);
VectorCopy(headnode->maxs, maxs);
//enlarge these mins and maxs
for (i = 0; i < 3; i++)
{
mins[i] -= 8;
maxs[i] += 8;
} //end for
//NOTE: have to add the BSP tree mins and maxs to the MAP mins and maxs
AddPointToBounds(mins, map_mins, map_maxs);
AddPointToBounds(maxs, map_mins, map_maxs);
//
if (!modelnum)
{
Log_Print("brush size: %5.0f,%5.0f,%5.0f to %5.0f,%5.0f,%5.0f\n",
map_mins[0], map_mins[1], map_mins[2],
map_maxs[0], map_maxs[1], map_maxs[2]);
} //end if
//create one huge brush containing the whole world
brush = BrushFromBounds(mins, maxs);
VectorCopy(mins, brush->mins);
VectorCopy(maxs, brush->maxs);
//
#ifdef HL_PRINT
qprintf("creating Half-Life brushes\n");
qprintf("%5d brushes", hl_numbrushes = 0);
#endif //HL_PRINT
//create the brushes
brushlist = HL_CreateBrushes_r(brush, hl_dmodels[modelnum].headnode[0]);
//
#ifdef HL_PRINT
qprintf("\n");
#endif //HL_PRINT
//now we've got a list with brushes!
return brushlist;
} //end of the function HL_CreateBrushesFromBSP
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *HL_MergeBrushes(bspbrush_t *brushlist, int modelnum)
{
int nummerges, merged;
bspbrush_t *b1, *b2, *tail, *newbrush, *newbrushlist;
bspbrush_t *lastb2;

if (!brushlist) return NULL;

if (!modelnum) qprintf("%5d brushes merged", nummerges = 0);
do
{
for (tail = brushlist; tail; tail = tail->next)
{
if (!tail->next) break;
} //end for
merged = 0;
newbrushlist = NULL;
for (b1 = brushlist; b1; b1 = brushlist)
{
lastb2 = b1;
for (b2 = b1->next; b2; b2 = b2->next)
{
//can't merge brushes with different contents
if (b1->side != b2->side) newbrush = NULL;
else newbrush = TryMergeBrushes(b1, b2);
//if a merged brush is created
if (newbrush)
{
//copy the brush contents
newbrush->side = b1->side;
//add the new brush to the end of the list
tail->next = newbrush;
//remove the second brush from the list
lastb2->next = b2->next;
//remove the first brush from the list
brushlist = brushlist->next;
//free the merged brushes
FreeBrush(b1);
FreeBrush(b2);
//get a new tail brush
for (tail = brushlist; tail; tail = tail->next)
{
if (!tail->next) break;
} //end for
merged++;
if (!modelnum) qprintf("\r%5d", nummerges++);
break;
} //end if
lastb2 = b2;
} //end for
//if b1 can't be merged with any of the other brushes
if (!b2)
{
brushlist = brushlist->next;
//keep b1
b1->next = newbrushlist;
newbrushlist = b1;
} //end else
} //end for
brushlist = newbrushlist;
} while(merged);
if (!modelnum) qprintf("\n");
return newbrushlist;
} //end of the function HL_MergeBrushes
//===========================================================================
// returns the amount the face and the winding have overlap
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
float HL_FaceOnWinding(hl_dface_t *face, winding_t *winding)
{
int i, edgenum, side;
float dist, area;
hl_dplane_t plane;
vec_t *v1, *v2;
vec3_t normal, edgevec;
winding_t *w;

//
w = CopyWinding(winding);
memcpy(&plane, &hl_dplanes[face->planenum], sizeof(hl_dplane_t));
//check on which side of the plane the face is
if (face->side)
{
VectorNegate(plane.normal, plane.normal);
plane.dist = -plane.dist;
} //end if
for (i = 0; i < face->numedges && w; i++)
{
//get the first and second vertex of the edge
edgenum = hl_dsurfedges[face->firstedge + i];
side = edgenum > 0;
//if the face plane is flipped
v1 = hl_dvertexes[hl_dedges[abs(edgenum)].v[side]].point;
v2 = hl_dvertexes[hl_dedges[abs(edgenum)].v[!side]].point;
//create a plane through the edge vector, orthogonal to the face plane
//and with the normal vector pointing out of the face
VectorSubtract(v1, v2, edgevec);
CrossProduct(edgevec, plane.normal, normal);
VectorNormalize(normal);
dist = DotProduct(normal, v1);
//
ChopWindingInPlace(&w, normal, dist, 0.9); //CLIP_EPSILON
} //end for
if (w)
{
area = WindingArea(w);
FreeWinding(w);
return area;
} //end if
return 0;
} //end of the function HL_FaceOnWinding
//===========================================================================
// returns a list with brushes created by splitting the given brush with
// planes that go through the face edges and are orthogonal to the face plane
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *HL_SplitBrushWithFace(bspbrush_t *brush, hl_dface_t *face)
{
int i, edgenum, side, planenum, splits;
float dist;
hl_dplane_t plane;
vec_t *v1, *v2;
vec3_t normal, edgevec;
bspbrush_t *front, *back, *brushlist;

memcpy(&plane, &hl_dplanes[face->planenum], sizeof(hl_dplane_t));
//check on which side of the plane the face is
if (face->side)
{
VectorNegate(plane.normal, plane.normal);
plane.dist = -plane.dist;
} //end if
splits = 0;
brushlist = NULL;
for (i = 0; i < face->numedges; i++)
{
//get the first and second vertex of the edge
edgenum = hl_dsurfedges[face->firstedge + i];
side = edgenum > 0;
//if the face plane is flipped
v1 = hl_dvertexes[hl_dedges[abs(edgenum)].v[side]].point;
v2 = hl_dvertexes[hl_dedges[abs(edgenum)].v[!side]].point;
//create a plane through the edge vector, orthogonal to the face plane
//and with the normal vector pointing out of the face
VectorSubtract(v1, v2, edgevec);
CrossProduct(edgevec, plane.normal, normal);
VectorNormalize(normal);
dist = DotProduct(normal, v1);
//
planenum = FindFloatPlane(normal, dist);
//split the current brush
SplitBrush(brush, planenum, &front, &back);
//if there is a back brush just put it in the list
if (back)
{
//copy the brush contents
back->side = brush->side;
//
back->next = brushlist;
brushlist = back;
splits++;
} //end if
if (!front)
{
Log_Print("HL_SplitBrushWithFace: no new brush\n");
FreeBrushList(brushlist);
return NULL;
} //end if
//copy the brush contents
front->side = brush->side;
//continue splitting the front brush
brush = front;
} //end for
if (!splits)
{
FreeBrush(front);
return NULL;
} //end if
front->next = brushlist;
brushlist = front;
return brushlist;
} //end of the function HL_SplitBrushWithFace
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
bspbrush_t *HL_TextureBrushes(bspbrush_t *brushlist, int modelnum)
{
float area, largestarea;
int i, n, texinfonum, sn, numbrushes, ofs;
int bestfacenum, sidenodenum;
side_t *side;
hl_dmiptexlump_t *miptexlump;
hl_miptex_t *miptex;
bspbrush_t *brush, *nextbrush, *prevbrush, *newbrushes, *brushlistend;
vec_t defaultvec[4] = {1, 0, 0, 0};

if (!modelnum) qprintf("texturing brushes\n");
if (!modelnum) qprintf("%5d brushes", numbrushes = 0);
//get a pointer to the last brush in the list
for (brushlistend = brushlist; brushlistend; brushlistend = brushlistend->next)
{
if (!brushlistend->next) break;
} //end for
//there's no previous brush when at the start of the list
prevbrush = NULL;
//go over the brush list
for (brush = brushlist; brush; brush = nextbrush)
{
nextbrush = brush->next;
//find a texinfo for every brush side
for (sn = 0; sn < brush->numsides; sn++)
{
side = &brush->sides[sn];
//
if (side->flags & SFL_TEXTURED) continue;
//number of the node that created this brush side
sidenodenum = side->surf; //see midwinding in HL_SplitBrush
//no face found yet
bestfacenum = -1;
//minimum face size
largestarea = 1;
//if optimizing the texture placement and not going for the
//least number of brushes
if (!lessbrushes)
{
for (i = 0; i < hl_numfaces; i++)
{
//the face must be in the same plane as the node plane that created
//this brush side
if (hl_dfaces[i].planenum == hl_dnodes[sidenodenum].planenum)
{
//get the area the face and the brush side overlap
area = HL_FaceOnWinding(&hl_dfaces[i], side->winding);
//if this face overlaps the brush side winding more than previous faces
if (area > largestarea)
{
//if there already was a face for texturing this brush side with
//a different texture
if (bestfacenum >= 0 &&
(hl_dfaces[bestfacenum].texinfo != hl_dfaces[i].texinfo))
{
//split the brush to fit the texture
newbrushes = HL_SplitBrushWithFace(brush, &hl_dfaces[i]);
//if new brushes where created
if (newbrushes)
{
//remove the current brush from the list
if (prevbrush) prevbrush->next = brush->next;
else brushlist = brush->next;
if (brushlistend == brush)
{
brushlistend = prevbrush;
nextbrush = newbrushes;
} //end if
//add the new brushes to the end of the list
if (brushlistend) brushlistend->next = newbrushes;
else brushlist = newbrushes;
//free the current brush
FreeBrush(brush);
//don't forget about the prevbrush pointer at the bottom of
//the outer loop
brush = prevbrush;
//find the end of the list
for (brushlistend = brushlist; brushlistend; brushlistend = brushlistend->next)
{
if (!brushlistend->next) break;
} //end for
break;
} //end if
else
{
Log_Write("brush %d: no real texture split", numbrushes);
} //end else
} //end if
else
{
//best face for texturing this brush side
bestfacenum = i;
} //end else
} //end if
} //end if
} //end for
//if the brush was split the original brush is removed
//and we just continue with the next one in the list
if (i < hl_numfaces) break;
} //end if
else
{
//find the face with the largest overlap with this brush side
//for texturing the brush side
for (i = 0; i < hl_numfaces; i++)
{
//the face must be in the same plane as the node plane that created
//this brush side
if (hl_dfaces[i].planenum == hl_dnodes[sidenodenum].planenum)
{
//get the area the face and the brush side overlap
area = HL_FaceOnWinding(&hl_dfaces[i], side->winding);
//if this face overlaps the brush side winding more than previous faces
if (area > largestarea)
{
largestarea = area;
bestfacenum = i;
} //end if
} //end if
} //end for
} //end else
//if a face was found for texturing this brush side
if (bestfacenum >= 0)
{
//set the MAP texinfo values
texinfonum = hl_dfaces[bestfacenum].texinfo;
for (n = 0; n < 4; n++)
{
map_texinfo[texinfonum].vecs[0][n] = hl_texinfo[texinfonum].vecs[0][n];
map_texinfo[texinfonum].vecs[1][n] = hl_texinfo[texinfonum].vecs[1][n];
} //end for
//make sure the two vectors aren't of zero length otherwise use the default
//vector to prevent a divide by zero in the map writing
if (VectorLength(map_texinfo[texinfonum].vecs[0]) < 0.01)
memcpy(map_texinfo[texinfonum].vecs[0], defaultvec, sizeof(defaultvec));
if (VectorLength(map_texinfo[texinfonum].vecs[1]) < 0.01)
memcpy(map_texinfo[texinfonum].vecs[1], defaultvec, sizeof(defaultvec));
//
map_texinfo[texinfonum].flags = hl_texinfo[texinfonum].flags;
map_texinfo[texinfonum].value = 0; //HL_ and HL texinfos don't have a value
//the mip texture
miptexlump = (hl_dmiptexlump_t *) hl_dtexdata;
ofs = miptexlump->dataofs[hl_texinfo[texinfonum].miptex];
if ( ofs > hl_texdatasize ) {
ofs = miptexlump->dataofs[0];
}
miptex = (hl_miptex_t *)((byte *)miptexlump + ofs );
//get the mip texture name
strcpy(map_texinfo[texinfonum].texture, miptex->name);
//no animations in Quake1 and Half-Life mip textures
map_texinfo[texinfonum].nexttexinfo = -1;
//store the texinfo number
side->texinfo = texinfonum;
//
if (texinfonum > map_numtexinfo) map_numtexinfo = texinfonum;
//this side is textured
side->flags |= SFL_TEXTURED;
} //end if
else
{
//no texture for this side
side->texinfo = TEXINFO_NODE;
//this side is textured
side->flags |= SFL_TEXTURED;
} //end if
} //end for
//
if (!modelnum && prevbrush != brush) qprintf("\r%5d", ++numbrushes);
//previous brush in the list
prevbrush = brush;
} //end for
if (!modelnum) qprintf("\n");
//return the new list with brushes
return brushlist;
} //end of the function HL_TextureBrushes
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_FixContentsTextures(bspbrush_t *brushlist)
{
int i, texinfonum;
bspbrush_t *brush;

for (brush = brushlist; brush; brush = brush->next)
{
//only fix the textures of water, slime and lava brushes
if (brush->side != CONTENTS_WATER &&
brush->side != CONTENTS_SLIME &&
brush->side != CONTENTS_LAVA) continue;
//
for (i = 0; i < brush->numsides; i++)
{
texinfonum = brush->sides[i].texinfo;
if (HL_TextureContents(map_texinfo[texinfonum].texture) == brush->side) break;
} //end for
//if no specific contents texture was found
if (i >= brush->numsides)
{
texinfonum = -1;
for (i = 0; i < map_numtexinfo; i++)
{
if (HL_TextureContents(map_texinfo[i].texture) == brush->side)
{
texinfonum = i;
break;
} //end if
} //end for
} //end if
//
if (texinfonum >= 0)
{
//give all the brush sides this contents texture
for (i = 0; i < brush->numsides; i++)
{
brush->sides[i].texinfo = texinfonum;
} //end for
} //end if
else Log_Print("brush contents %d with wrong textures\n", brush->side);
//
} //end for
/*
for (brush = brushlist; brush; brush = brush->next)
{
//give all the brush sides this contents texture
for (i = 0; i < brush->numsides; i++)
{
if (HL_TextureContents(map_texinfo[texinfonum].texture) != brush->side)
{
Error("brush contents %d with wrong contents textures %s\n", brush->side,
HL_TextureContents(map_texinfo[texinfonum].texture));
} //end if
} //end for
} //end for*/
} //end of the function HL_FixContentsTextures
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_BSPBrushToMapBrush(bspbrush_t *bspbrush, entity_t *mapent)
{
mapbrush_t *mapbrush;
side_t *side;
int i, besttexinfo;

if (nummapbrushes >= MAX_MAPFILE_BRUSHES)
Error ("nummapbrushes == MAX_MAPFILE_BRUSHES");

mapbrush = &mapbrushes[nummapbrushes];
mapbrush->original_sides = &brushsides[nummapbrushsides];
mapbrush->entitynum = mapent - entities;
mapbrush->brushnum = nummapbrushes - mapent->firstbrush;
mapbrush->leafnum = -1;
mapbrush->numsides = 0;

besttexinfo = TEXINFO_NODE;
for (i = 0; i < bspbrush->numsides; i++)
{
if (!bspbrush->sides[i].winding) continue;
//
if (nummapbrushsides >= MAX_MAPFILE_BRUSHSIDES)
Error ("MAX_MAPFILE_BRUSHSIDES");
side = &brushsides[nummapbrushsides];
//the contents of the bsp brush is stored in the side variable
side->contents = bspbrush->side;
side->surf = 0;
side->planenum = bspbrush->sides[i].planenum;
side->texinfo = bspbrush->sides[i].texinfo;
if (side->texinfo != TEXINFO_NODE)
{
//this brush side is textured
side->flags |= SFL_TEXTURED;
besttexinfo = side->texinfo;
} //end if
//
nummapbrushsides++;
mapbrush->numsides++;
} //end for
//
if (besttexinfo == TEXINFO_NODE)
{
mapbrush->numsides = 0;
hl_numclipbrushes++;
return;
} //end if
//set the texinfo for all the brush sides without texture
for (i = 0; i < mapbrush->numsides; i++)
{
if (mapbrush->original_sides[i].texinfo == TEXINFO_NODE)
{
mapbrush->original_sides[i].texinfo = besttexinfo;
} //end if
} //end for
//contents of the brush
mapbrush->contents = bspbrush->side;
//
if (create_aas)
{
//create the AAS brushes from this brush, add brush bevels
AAS_CreateMapBrushes(mapbrush, mapent, true);
return;
} //end if
//create windings for sides and bounds for brush
MakeBrushWindings(mapbrush);
//add brush bevels
AddBrushBevels(mapbrush);
//a new brush has been created
nummapbrushes++;
mapent->numbrushes++;
} //end of the function HL_BSPBrushToMapBrush
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_CreateMapBrushes(entity_t *mapent, int modelnum)
{
bspbrush_t *brushlist, *brush, *nextbrush;
int i;

//create brushes from the model BSP tree
brushlist = HL_CreateBrushesFromBSP(modelnum);
//texture the brushes and split them when necesary
brushlist = HL_TextureBrushes(brushlist, modelnum);
//fix the contents textures of all brushes
HL_FixContentsTextures(brushlist);
//
if (!nobrushmerge)
{
brushlist = HL_MergeBrushes(brushlist, modelnum);
//brushlist = HL_MergeBrushes(brushlist, modelnum);
} //end if
//
if (!modelnum) qprintf("converting brushes to map brushes\n");
if (!modelnum) qprintf("%5d brushes", i = 0);
for (brush = brushlist; brush; brush = nextbrush)
{
nextbrush = brush->next;
HL_BSPBrushToMapBrush(brush, mapent);
brush->next = NULL;
FreeBrush(brush);
if (!modelnum) qprintf("\r%5d", ++i);
} //end for
if (!modelnum) qprintf("\n");
} //end of the function HL_CreateMapBrushes
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_ResetMapLoading(void)
{
} //end of the function HL_ResetMapLoading
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void HL_LoadMapFromBSP(char *filename, int offset, int length)
{
int i, modelnum;
char *model, *classname;

Log_Print("-- HL_LoadMapFromBSP --\n");
//loaded map type
loadedmaptype = MAPTYPE_HALFLIFE;
//
qprintf("loading map from %s at %d\n", filename, offset);
//load the Half-Life BSP file
HL_LoadBSPFile(filename, offset, length);
//
hl_numclipbrushes = 0;
//parse the entities from the BSP
HL_ParseEntities();
//clear the map mins and maxs
ClearBounds(map_mins, map_maxs);
//
qprintf("creating Half-Life brushes\n");
if (lessbrushes) qprintf("creating minimum number of brushes\n");
else qprintf("placing textures correctly\n");
//
for (i = 0; i < num_entities; i++)
{
entities[i].firstbrush = nummapbrushes;
entities[i].numbrushes = 0;
//
classname = ValueForKey(&entities[i], "classname");
if (classname && !strcmp(classname, "worldspawn"))
{
modelnum = 0;
} //end if
else
{
//
model = ValueForKey(&entities[i], "model");
if (!model || *model != '*') continue;
model++;
modelnum = atoi(model);
} //end else
//create map brushes for the entity
HL_CreateMapBrushes(&entities[i], modelnum);
} //end for
//
qprintf("%5d map brushes\n", nummapbrushes);
qprintf("%5d clip brushes\n", hl_numclipbrushes);
} //end of the function HL_LoadMapFromBSP
Something went wrong with that request. Please try again.