world.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // world.c -- world query functions
  21
  22 #include "quakedef.h"
  23
  24 /*
  25
  26 entities never clip against themselves, or their owner
  27
  28 line of sight checks trace->inopen and trace->inwater, but bullets don't
  29
  30 */
  31
  32 cvar_t sv_debugmove = {CVAR_NOTIFY, "sv_debugmove", "0"};
  33 cvar_t sv_polygoncollisions = {CVAR_NOTIFY, "sv_polygoncollisions", "0"};
  34 cvar_t sv_areagrid_mingridsize = {CVAR_NOTIFY, "sv_areagrid_mingridsize", "64"};
  35
  36 void SV_AreaStats_f(void);
  37
  38 void SV_World_Init(void)
  39 {
  40         Cvar_RegisterVariable(&sv_debugmove);
  41         Cvar_RegisterVariable(&sv_polygoncollisions);
  42         Cvar_RegisterVariable(&sv_areagrid_mingridsize);
  43         Cmd_AddCommand("sv_areastats", SV_AreaStats_f);
  44         Collision_Init();
  45 }
  46
  47 typedef struct
  48 {
  49         // bounding box of entire move area
  50         vec3_t boxmins, boxmaxs;
  51
  52         // size of the moving object
  53         vec3_t mins, maxs;
  54
  55         // size when clipping against monsters
  56         vec3_t mins2, maxs2;
  57
  58         // size when clipping against brush models
  59         vec3_t hullmins, hullmaxs;
  60
  61         // start and end origin of move
  62         vec3_t start, end;
  63
  64         // trace results
  65         trace_t trace;
  66
  67         // type of move (like ignoring monsters, or similar)
  68         int type;
  69
  70         // the edict that is moving (if any)
  71         edict_t *passedict;
  72 }
  73 moveclip_t;
  74
  75 //============================================================================
  76
  77 // ClearLink is used for new headnodes
  78 static void ClearLink (link_t *l)
  79 {
  80         l->entitynumber = 0;
  81         l->prev = l->next = l;
  82 }
  83
  84 static void RemoveLink (link_t *l)
  85 {
  86         l->next->prev = l->prev;
  87         l->prev->next = l->next;
  88 }
  89
  90 static void InsertLinkBefore (link_t *l, link_t *before, int entitynumber)
  91 {
  92         l->entitynumber = entitynumber;
  93         l->next = before;
  94         l->prev = before->prev;
  95         l->prev->next = l;
  96         l->next->prev = l;
  97 }
  98
  99
 100 /*
 101 ===============================================================================
 102
 103 ENTITY AREA CHECKING
 104
 105 ===============================================================================
 106 */
 107
 108 int sv_areagrid_stats_calls = 0;
 109 int sv_areagrid_stats_nodechecks = 0;
 110 int sv_areagrid_stats_entitychecks = 0;
 111
 112 void SV_AreaStats_f(void)
 113 {
 114         Con_Printf("areagrid check stats: %d calls %d nodes (%f per call) %d entities (%f per call)\n", sv_areagrid_stats_calls, sv_areagrid_stats_nodechecks, (double) sv_areagrid_stats_nodechecks / (double) sv_areagrid_stats_calls, sv_areagrid_stats_entitychecks, (double) sv_areagrid_stats_entitychecks / (double) sv_areagrid_stats_calls);
 115         sv_areagrid_stats_calls = 0;
 116         sv_areagrid_stats_nodechecks = 0;
 117         sv_areagrid_stats_entitychecks = 0;
 118 }
 119
 120 typedef struct areagrid_s
 121 {
 122         link_t trigger_edicts;
 123         link_t solid_edicts;
 124 }
 125 areagrid_t;
 126
 127 #define AREA_GRID 512
 128 #define AREA_GRIDNODES (AREA_GRID * AREA_GRID)
 129
 130 static areagrid_t sv_areagrid[AREA_GRIDNODES], sv_areagrid_outside;
 131 static vec3_t sv_areagrid_bias, sv_areagrid_scale, sv_areagrid_mins, sv_areagrid_maxs, sv_areagrid_size;
 132 static int sv_areagrid_marknumber = 1;
 133
 134 void SV_CreateAreaGrid (vec3_t mins, vec3_t maxs)
 135 {
 136         int i;
 137         ClearLink (&sv_areagrid_outside.trigger_edicts);
 138         ClearLink (&sv_areagrid_outside.solid_edicts);
 139         // choose either the world box size, or a larger box to ensure the grid isn't too fine
 140         sv_areagrid_size[0] = max(maxs[0] - mins[0], AREA_GRID * sv_areagrid_mingridsize.value);
 141         sv_areagrid_size[1] = max(maxs[1] - mins[1], AREA_GRID * sv_areagrid_mingridsize.value);
 142         sv_areagrid_size[2] = max(maxs[2] - mins[2], AREA_GRID * sv_areagrid_mingridsize.value);
 143         // figure out the corners of such a box, centered at the center of the world box
 144         sv_areagrid_mins[0] = (mins[0] + maxs[0] - sv_areagrid_size[0]) * 0.5f;
 145         sv_areagrid_mins[1] = (mins[1] + maxs[1] - sv_areagrid_size[1]) * 0.5f;
 146         sv_areagrid_mins[2] = (mins[2] + maxs[2] - sv_areagrid_size[2]) * 0.5f;
 147         sv_areagrid_maxs[0] = (mins[0] + maxs[0] + sv_areagrid_size[0]) * 0.5f;
 148         sv_areagrid_maxs[1] = (mins[1] + maxs[1] + sv_areagrid_size[1]) * 0.5f;
 149         sv_areagrid_maxs[2] = (mins[2] + maxs[2] + sv_areagrid_size[2]) * 0.5f;
 150         // now calculate the actual useful info from that
 151         VectorNegate(sv_areagrid_mins, sv_areagrid_bias);
 152         sv_areagrid_scale[0] = AREA_GRID / sv_areagrid_size[0];
 153         sv_areagrid_scale[1] = AREA_GRID / sv_areagrid_size[1];
 154         sv_areagrid_scale[2] = AREA_GRID / sv_areagrid_size[2];
 155         for (i = 0;i < AREA_GRIDNODES;i++)
 156         {
 157                 ClearLink (&sv_areagrid[i].trigger_edicts);
 158                 ClearLink (&sv_areagrid[i].solid_edicts);
 159         }
 160         Con_DPrintf("sv_areagrid settings: divisions %ix%ix1 : box %f %f %f : %f %f %f size %f %f %f grid %f %f %f (mingrid %f)\n", AREA_GRID, AREA_GRID, sv_areagrid_mins[0], sv_areagrid_mins[1], sv_areagrid_mins[2], sv_areagrid_maxs[0], sv_areagrid_maxs[1], sv_areagrid_maxs[2], sv_areagrid_size[0], sv_areagrid_size[1], sv_areagrid_size[2], 1.0f / sv_areagrid_scale[0], 1.0f / sv_areagrid_scale[1], 1.0f / sv_areagrid_scale[2], sv_areagrid_mingridsize.value);
 161 }
 162
 163 /*
 164 ===============
 165 SV_ClearWorld
 166
 167 ===============
 168 */
 169 void SV_ClearWorld (void)
 170 {
 171         Mod_CheckLoaded(sv.worldmodel);
 172         SV_CreateAreaGrid(sv.worldmodel->normalmins, sv.worldmodel->normalmaxs);
 173 }
 174
 175
 176 /*
 177 ===============
 178 SV_UnlinkEdict
 179
 180 ===============
 181 */
 182 void SV_UnlinkEdict (edict_t *ent)
 183 {
 184         int i;
 185         for (i = 0;i < ENTITYGRIDAREAS;i++)
 186         {
 187                 if (ent->e->areagrid[i].prev)
 188                 {
 189                         RemoveLink (&ent->e->areagrid[i]);
 190                         ent->e->areagrid[i].prev = ent->e->areagrid[i].next = NULL;
 191                 }
 192         }
 193 }
 194
 195
 196 void SV_TouchAreaGrid(edict_t *ent)
 197 {
 198         link_t *l, *next;
 199         edict_t *touch;
 200         areagrid_t *grid;
 201         int old_self, old_other, igrid[3], igridmins[3], igridmaxs[3];
 202
 203         sv_areagrid_marknumber++;
 204         igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
 205         igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
 206         //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
 207         igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
 208         igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
 209         //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
 210         igridmins[0] = max(0, igridmins[0]);
 211         igridmins[1] = max(0, igridmins[1]);
 212         //igridmins[2] = max(0, igridmins[2]);
 213         igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
 214         igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
 215         //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
 216
 217         for (l = sv_areagrid_outside.trigger_edicts.next;l != &sv_areagrid_outside.trigger_edicts;l = next)
 218         {
 219                 next = l->next;
 220                 touch = EDICT_NUM(l->entitynumber);
 221                 if (ent->v->absmin[0] > touch->v->absmax[0]
 222                  || ent->v->absmax[0] < touch->v->absmin[0]
 223                  || ent->v->absmin[1] > touch->v->absmax[1]
 224                  || ent->v->absmax[1] < touch->v->absmin[1]
 225                  || ent->v->absmin[2] > touch->v->absmax[2]
 226                  || ent->v->absmax[2] < touch->v->absmin[2])
 227                         continue;
 228                 if (touch == ent)
 229                         continue;
 230                 if (!touch->v->touch || touch->v->solid != SOLID_TRIGGER)
 231                         continue;
 232                 old_self = pr_global_struct->self;
 233                 old_other = pr_global_struct->other;
 234
 235                 pr_global_struct->self = EDICT_TO_PROG(touch);
 236                 pr_global_struct->other = EDICT_TO_PROG(ent);
 237                 pr_global_struct->time = sv.time;
 238                 PR_ExecuteProgram (touch->v->touch, "");
 239
 240                 pr_global_struct->self = old_self;
 241                 pr_global_struct->other = old_other;
 242         }
 243
 244         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
 245         {
 246                 grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
 247                 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
 248                 {
 249                         for (l = grid->trigger_edicts.next;l != &grid->trigger_edicts;l = next)
 250                         {
 251                                 next = l->next;
 252                                 touch = EDICT_NUM(l->entitynumber);
 253                                 if (touch->e->areagridmarknumber == sv_areagrid_marknumber)
 254                                         continue;
 255                                 touch->e->areagridmarknumber = sv_areagrid_marknumber;
 256                                 if (ent->v->absmin[0] > touch->v->absmax[0]
 257                                  || ent->v->absmax[0] < touch->v->absmin[0]
 258                                  || ent->v->absmin[1] > touch->v->absmax[1]
 259                                  || ent->v->absmax[1] < touch->v->absmin[1]
 260                                  || ent->v->absmin[2] > touch->v->absmax[2]
 261                                  || ent->v->absmax[2] < touch->v->absmin[2])
 262                                         continue;
 263                                 // LordHavoc: id bug that won't be fixed: triggers do not ignore their owner like solid objects do
 264                                 if (touch == ent)
 265                                         continue;
 266                                 if (!touch->v->touch || touch->v->solid != SOLID_TRIGGER)
 267                                         continue;
 268                                 old_self = pr_global_struct->self;
 269                                 old_other = pr_global_struct->other;
 270
 271                                 pr_global_struct->self = EDICT_TO_PROG(touch);
 272                                 pr_global_struct->other = EDICT_TO_PROG(ent);
 273                                 pr_global_struct->time = sv.time;
 274                                 PR_ExecuteProgram (touch->v->touch, "");
 275
 276                                 pr_global_struct->self = old_self;
 277                                 pr_global_struct->other = old_other;
 278                         }
 279                 }
 280         }
 281 }
 282
 283 void SV_LinkEdict_AreaGrid(edict_t *ent)
 284 {
 285         areagrid_t *grid;
 286         int igrid[3], igridmins[3], igridmaxs[3], gridnum, entitynumber = NUM_FOR_EDICT(ent);
 287
 288         if (entitynumber <= 0 || entitynumber >= sv.max_edicts || EDICT_NUM(entitynumber) != ent)
 289                 Host_Error("SV_LinkEdict_AreaGrid: invalid edict %p (sv.edicts is %p, edict compared to sv.edicts is %i)\n", ent, sv.edicts, entitynumber);
 290
 291         igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
 292         igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
 293         //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
 294         igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
 295         igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
 296         //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
 297         if (igridmins[0] < 0 || igridmaxs[0] > AREA_GRID || igridmins[1] < 0 || igridmaxs[1] > AREA_GRID || ((igridmaxs[0] - igridmins[0]) * (igridmaxs[1] - igridmins[1])) > ENTITYGRIDAREAS)
 298         {
 299                 // wow, something outside the grid, store it as such
 300                 if (ent->v->solid == SOLID_TRIGGER)
 301                         InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.trigger_edicts, entitynumber);
 302                 else
 303                         InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.solid_edicts, entitynumber);
 304                 return;
 305         }
 306
 307         gridnum = 0;
 308         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
 309         {
 310                 grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
 311                 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++, gridnum++)
 312                 {
 313                         if (ent->v->solid == SOLID_TRIGGER)
 314                                 InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->trigger_edicts, entitynumber);
 315                         else
 316                                 InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->solid_edicts, entitynumber);
 317                 }
 318         }
 319 }
 320
 321 /*
 322 ===============
 323 SV_LinkEdict
 324
 325 ===============
 326 */
 327 void SV_LinkEdict (edict_t *ent, qboolean touch_triggers)
 328 {
 329         model_t *model;
 330
 331         if (ent->e->areagrid[0].prev)
 332                 SV_UnlinkEdict (ent);   // unlink from old position
 333
 334         if (ent == sv.edicts)
 335                 return;         // don't add the world
 336
 337         if (ent->e->free)
 338                 return;
 339
 340 // set the abs box
 341
 342         if (ent->v->solid == SOLID_BSP)
 343         {
 344                 if (ent->v->modelindex < 0 || ent->v->modelindex > MAX_MODELS)
 345                         Host_Error("SOLID_BSP with invalid modelindex!\n");
 346                 model = sv.models[(int) ent->v->modelindex];
 347                 if (model != NULL)
 348                 {
 349                         Mod_CheckLoaded(model);
 350                         if (model->type != mod_brush)
 351                                 Host_Error("SOLID_BSP with non-BSP model\n");
 352
 353                         if (ent->v->angles[0] || ent->v->angles[2] || ent->v->avelocity[0] || ent->v->avelocity[2])
 354                         {
 355                                 VectorAdd(ent->v->origin, model->rotatedmins, ent->v->absmin);
 356                                 VectorAdd(ent->v->origin, model->rotatedmaxs, ent->v->absmax);
 357                         }
 358                         else if (ent->v->angles[1] || ent->v->avelocity[1])
 359                         {
 360                                 VectorAdd(ent->v->origin, model->yawmins, ent->v->absmin);
 361                                 VectorAdd(ent->v->origin, model->yawmaxs, ent->v->absmax);
 362                         }
 363                         else
 364                         {
 365                                 VectorAdd(ent->v->origin, model->normalmins, ent->v->absmin);
 366                                 VectorAdd(ent->v->origin, model->normalmaxs, ent->v->absmax);
 367                         }
 368                 }
 369                 else
 370                 {
 371                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
 372                         VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
 373                         VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
 374                 }
 375         }
 376         else
 377         {
 378                 VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
 379                 VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
 380         }
 381
 382 //
 383 // to make items easier to pick up and allow them to be grabbed off
 384 // of shelves, the abs sizes are expanded
 385 //
 386         if ((int)ent->v->flags & FL_ITEM)
 387         {
 388                 ent->v->absmin[0] -= 15;
 389                 ent->v->absmin[1] -= 15;
 390                 ent->v->absmin[2] -= 1;
 391                 ent->v->absmax[0] += 15;
 392                 ent->v->absmax[1] += 15;
 393                 ent->v->absmax[2] += 1;
 394         }
 395         else
 396         {
 397                 // because movement is clipped an epsilon away from an actual edge,
 398                 // we must fully check even when bounding boxes don't quite touch
 399                 ent->v->absmin[0] -= 1;
 400                 ent->v->absmin[1] -= 1;
 401                 ent->v->absmin[2] -= 1;
 402                 ent->v->absmax[0] += 1;
 403                 ent->v->absmax[1] += 1;
 404                 ent->v->absmax[2] += 1;
 405         }
 406
 407         if (ent->v->solid == SOLID_NOT)
 408                 return;
 409
 410         SV_LinkEdict_AreaGrid(ent);
 411
 412 // if touch_triggers, touch all entities at this node and descend for more
 413         if (touch_triggers)
 414                 SV_TouchAreaGrid(ent);
 415 }
 416
 417
 418
 419 /*
 420 ===============================================================================
 421
 422 POINT TESTING IN HULLS
 423
 424 ===============================================================================
 425 */
 426
 427 /*
 428 ============
 429 SV_TestEntityPosition
 430
 431 This could be a lot more efficient...
 432 ============
 433 */
 434 int SV_TestEntityPosition (edict_t *ent)
 435 {
 436         return SV_Move (ent->v->origin, ent->v->mins, ent->v->maxs, ent->v->origin, MOVE_NORMAL, ent).startsolid;
 437 }
 438
 439
 440 /*
 441 ===============================================================================
 442
 443 LINE TESTING IN HULLS
 444
 445 ===============================================================================
 446 */
 447
 448 /*
 449 ==================
 450 SV_ClipMoveToEntity
 451
 452 Handles selection or creation of a clipping hull, and offseting (and
 453 eventually rotation) of the end points
 454 ==================
 455 */
 456 trace_t SV_ClipMoveToEntity(edict_t *ent, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end)
 457 {
 458         int i;
 459         trace_t trace;
 460         model_t *model = NULL;
 461         matrix4x4_t matrix, imatrix;
 462         float tempnormal[3], starttransformed[3], endtransformed[3];
 463         float starttransformedmins[3], starttransformedmaxs[3], endtransformedmins[3], endtransformedmaxs[3];
 464
 465         if ((int) ent->v->solid == SOLID_BSP)
 466         {
 467                 i = ent->v->modelindex;
 468                 if ((unsigned int) i >= MAX_MODELS)
 469                         Host_Error("SV_ClipMoveToEntity: invalid modelindex\n");
 470                 model = sv.models[i];
 471                 if (i != 0 && model == NULL)
 472                         Host_Error("SV_ClipMoveToEntity: invalid modelindex\n");
 473
 474                 Mod_CheckLoaded(model);
 475                 if (model->type != mod_brush)
 476                 {
 477                         Con_Printf ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model, entity dump:\n");
 478                         ED_Print (ent);
 479                         Host_Error ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model\n");
 480                 }
 481                 if (ent->v->movetype != MOVETYPE_PUSH)
 482                         Host_Error ("SV_ClipMoveToEntity: SOLID_BSP without MOVETYPE_PUSH");
 483         }
 484
 485         Matrix4x4_CreateFromQuakeEntity(&matrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2], ent->v->angles[0], ent->v->angles[1], ent->v->angles[2], 1);
 486         Matrix4x4_Invert_Simple(&imatrix, &matrix);
 487         Matrix4x4_Transform(&imatrix, start, starttransformed);
 488         Matrix4x4_Transform(&imatrix, end, endtransformed);
 489         VectorAdd(starttransformed, maxs, starttransformedmaxs);
 490         VectorAdd(endtransformed, maxs, endtransformedmaxs);
 491         VectorAdd(starttransformed, mins, starttransformedmins);
 492         VectorAdd(endtransformed, mins, endtransformedmins);
 493
 494         // FIXME: the PolygonClipTrace should go away (should all be done in model code)
 495         if (sv_polygoncollisions.integer == 1)
 496                 Collision_PolygonClipTrace(&trace, ent, model, vec3_origin, vec3_origin, ent->v->mins, ent->v->maxs, starttransformed, mins, maxs, endtransformed);
 497         else if (model && model->brush.TraceBox)
 498                 model->brush.TraceBox(model, &trace, starttransformedmins, starttransformedmaxs, endtransformedmins, endtransformedmaxs);
 499         else
 500                 Collision_ClipTrace_Box(&trace, ent->v->mins, ent->v->maxs, starttransformed, mins, maxs, endtransformed);
 501
 502         if (trace.fraction < 1 || trace.startsolid)
 503                 trace.ent = ent;
 504         VectorLerp(start, trace.fraction, end, trace.endpos);
 505         VectorCopy(trace.plane.normal, tempnormal);
 506         Matrix4x4_Transform3x3(&matrix, tempnormal, trace.plane.normal);
 507         // FIXME: should recalc trace.plane.dist
 508
 509         return trace;
 510 }
 511
 512 //===========================================================================
 513
 514 void SV_ClipToNode(moveclip_t *clip, link_t *list)
 515 {
 516         link_t *l, *next;
 517         edict_t *touch;
 518         trace_t trace;
 519
 520         sv_areagrid_stats_nodechecks++;
 521         for (l = list->next;l != list;l = next)
 522         {
 523                 next = l->next;
 524                 touch = EDICT_NUM(l->entitynumber);
 525                 if (touch->e->areagridmarknumber == sv_areagrid_marknumber)
 526                         continue;
 527                 touch->e->areagridmarknumber = sv_areagrid_marknumber;
 528                 sv_areagrid_stats_entitychecks++;
 529
 530                 if (clip->boxmins[0] > touch->v->absmax[0]
 531                  || clip->boxmaxs[0] < touch->v->absmin[0]
 532                  || clip->boxmins[1] > touch->v->absmax[1]
 533                  || clip->boxmaxs[1] < touch->v->absmin[1]
 534                  || clip->boxmins[2] > touch->v->absmax[2]
 535                  || clip->boxmaxs[2] < touch->v->absmin[2])
 536                         continue;
 537
 538                 if (clip->type == MOVE_NOMONSTERS && touch->v->solid != SOLID_BSP)
 539                         continue;
 540
 541                 if (touch->v->solid == SOLID_NOT)
 542                         continue;
 543
 544                 if (clip->passedict)
 545                 {
 546                         if (!clip->passedict->v->size[0] && !touch->v->size[0])
 547                                 continue;       // points never interact
 548                         if (PROG_TO_EDICT(touch->v->owner) == clip->passedict)
 549                                 continue;       // don't clip against own missiles
 550                         if (PROG_TO_EDICT(clip->passedict->v->owner) == touch)
 551                                 continue;       // don't clip against owner
 552                         // LordHavoc: corpse code
 553                         if (clip->passedict->v->solid == SOLID_CORPSE && (touch->v->solid == SOLID_SLIDEBOX || touch->v->solid == SOLID_CORPSE))
 554                                 continue;
 555                         if (clip->passedict->v->solid == SOLID_SLIDEBOX && touch->v->solid == SOLID_CORPSE)
 556                                 continue;
 557                 }
 558
 559                 if (touch == clip->passedict)
 560                         continue;
 561                 if (touch->v->solid == SOLID_TRIGGER)
 562                 {
 563                         ED_Print(touch);
 564                         Host_Error ("Trigger in clipping list");
 565                 }
 566
 567                 // might interact, so do an exact clip
 568                 if (touch->v->solid == SOLID_BSP)
 569                         trace = SV_ClipMoveToEntity (touch, clip->start, clip->hullmins, clip->hullmaxs, clip->end);
 570                 else if ((int)touch->v->flags & FL_MONSTER)
 571                         trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins2, clip->maxs2, clip->end);
 572                 else
 573                         trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins, clip->maxs, clip->end);
 574                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
 575                 if (trace.allsolid)
 576                         clip->trace.allsolid = true;
 577                 if (trace.startsolid)
 578                 {
 579                         clip->trace.startsolid = true;
 580                         if (!clip->trace.ent)
 581                                 clip->trace.ent = trace.ent;
 582                 }
 583                 if (trace.inopen)
 584                         clip->trace.inopen = true;
 585                 if (trace.inwater)
 586                         clip->trace.inwater = true;
 587                 if (trace.fraction < clip->trace.fraction)
 588                 {
 589                         clip->trace.fraction = trace.fraction;
 590                         VectorCopy(trace.endpos, clip->trace.endpos);
 591                         clip->trace.plane = trace.plane;
 592                         //clip->trace.endcontents = trace.endcontents;
 593                         clip->trace.ent = touch;
 594                 }
 595                 // FIXME: the handling of endcontents is really broken but works well enough for point checks
 596                 if (trace.endcontents < clip->trace.endcontents || trace.endcontents == CONTENTS_SOLID)
 597                 {
 598                         // lower numbered (lava is lower than water, for example)
 599                         // contents override higher numbered contents, except for
 600                         // CONTENTS_SOLID which overrides everything
 601                         clip->trace.endcontents = trace.endcontents;
 602                 }
 603                 if (clip->trace.allsolid)
 604                         return;
 605         }
 606 }
 607
 608 /*
 609 ==================
 610 SV_Move
 611 ==================
 612 */
 613 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, edict_t *passedict)
 614 {
 615         moveclip_t clip;
 616         vec3_t bigmins, bigmaxs;
 617         areagrid_t *grid;
 618         int i, igrid[3], igridmins[3], igridmaxs[3];
 619
 620         memset(&clip, 0, sizeof(moveclip_t));
 621
 622         VectorCopy(start, clip.start);
 623         VectorCopy(end, clip.end);
 624         VectorCopy(mins, clip.mins);
 625         VectorCopy(maxs, clip.maxs);
 626         clip.type = type;
 627         clip.passedict = passedict;
 628
 629         Collision_RoundUpToHullSize(sv.worldmodel, clip.mins, clip.maxs, clip.hullmins, clip.hullmaxs);
 630
 631         // clip to world
 632         clip.trace = SV_ClipMoveToEntity(sv.edicts, clip.start, clip.hullmins, clip.hullmaxs, clip.end);
 633         //if (clip.trace.allsolid)
 634         //      return clip.trace;
 635
 636         if (clip.type == MOVE_MISSILE)
 637         {
 638                 // LordHavoc: modified this, was = -15, now = clip.mins[i] - 15
 639                 for (i=0 ; i<3 ; i++)
 640                 {
 641                         clip.mins2[i] = clip.mins[i] - 15;
 642                         clip.maxs2[i] = clip.maxs[i] + 15;
 643                 }
 644         }
 645         else
 646         {
 647                 VectorCopy (clip.mins, clip.mins2);
 648                 VectorCopy (clip.maxs, clip.maxs2);
 649         }
 650
 651         bigmins[0] = min(clip.mins2[0], clip.hullmins[0]);
 652         bigmaxs[0] = max(clip.maxs2[0], clip.hullmaxs[0]);
 653         bigmins[1] = min(clip.mins2[1], clip.hullmins[1]);
 654         bigmaxs[1] = max(clip.maxs2[1], clip.hullmaxs[1]);
 655         bigmins[2] = min(clip.mins2[2], clip.hullmins[2]);
 656         bigmaxs[2] = max(clip.maxs2[2], clip.hullmaxs[2]);
 657
 658         // create the bounding box of the entire move
 659         if (!sv_debugmove.integer)
 660         {
 661                 int i;
 662
 663                 for (i=0 ; i<3 ; i++)
 664                 {
 665                         if (clip.trace.endpos[i] > clip.start[i])
 666                         {
 667                                 clip.boxmins[i] = clip.start[i] + bigmins[i] - 1;
 668                                 clip.boxmaxs[i] = clip.trace.endpos[i] + bigmaxs[i] + 1;
 669                         }
 670                         else
 671                         {
 672                                 clip.boxmins[i] = clip.trace.endpos[i] + bigmins[i] - 1;
 673                                 clip.boxmaxs[i] = clip.start[i] + bigmaxs[i] + 1;
 674                         }
 675                 }
 676         }
 677         else
 678         {
 679                 // debug to test against everything
 680                 clip.boxmins[0] = clip.boxmins[1] = clip.boxmins[2] = -999999999;
 681                 clip.boxmaxs[0] = clip.boxmaxs[1] = clip.boxmaxs[2] =  999999999;
 682         }
 683
 684         // clip to enttiies
 685         sv_areagrid_stats_calls++;
 686         sv_areagrid_marknumber++;
 687         igridmins[0] = (int) ((clip.boxmins[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
 688         igridmins[1] = (int) ((clip.boxmins[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
 689         //igridmins[2] = (int) ((clip->boxmins[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
 690         igridmaxs[0] = (int) ((clip.boxmaxs[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
 691         igridmaxs[1] = (int) ((clip.boxmaxs[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
 692         //igridmaxs[2] = (int) ((clip->boxmaxs[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
 693         igridmins[0] = max(0, igridmins[0]);
 694         igridmins[1] = max(0, igridmins[1]);
 695         //igridmins[2] = max(0, igridmins[2]);
 696         igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
 697         igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
 698         //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
 699
 700         if (sv_areagrid_outside.solid_edicts.next != &sv_areagrid_outside.solid_edicts)
 701                 SV_ClipToNode(&clip, &sv_areagrid_outside.solid_edicts);
 702
 703         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
 704                 for (grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0], igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
 705                         if (grid->solid_edicts.next != &grid->solid_edicts)
 706                                 SV_ClipToNode(&clip, &grid->solid_edicts);
 707
 708         return clip.trace;
 709 }
 710
 711 int SV_PointContents(const vec3_t point)
 712 {
 713 #if 1
 714         return SV_Move(point, vec3_origin, vec3_origin, point, MOVE_NOMONSTERS, NULL).endcontents;
 715 #else
 716         if (sv.worldmodel && sv.worldmodel->brush.PointContents)
 717                 return sv.worldmodel->brush.PointContents(sv.worldmodel, point);
 718         return CONTENTS_SOLID;
 719 #endif
 720 }
 721