sv_phys.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 // sv_phys.c
  21
  22 #include "quakedef.h"
  23
  24 /*
  25
  26
  27 pushmove objects do not obey gravity, and do not interact with each other or trigger fields, but block normal movement and push normal objects when they move.
  28
  29 onground is set for toss objects when they come to a complete rest.  it is set for steping or walking objects
  30
  31 doors, plats, etc are SOLID_BSP, and MOVETYPE_PUSH
  32 bonus items are SOLID_TRIGGER touch, and MOVETYPE_TOSS
  33 corpses are SOLID_NOT and MOVETYPE_TOSS
  34 crates are SOLID_BBOX and MOVETYPE_TOSS
  35 walking monsters are SOLID_SLIDEBOX and MOVETYPE_STEP
  36 flying/floating monsters are SOLID_SLIDEBOX and MOVETYPE_FLY
  37
  38 solid_edge items only clip against bsp models.
  39
  40 */
  41
  42 #define MOVE_EPSILON    0.01
  43
  44 void SV_Physics_Toss (prvm_edict_t *ent);
  45
  46 /*
  47 ===============================================================================
  48
  49 LINE TESTING IN HULLS
  50
  51 ===============================================================================
  52 */
  53
  54 int SV_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
  55 {
  56         prvm_eval_t *val;
  57         if (passedict)
  58         {
  59                 val = PRVM_EDICTFIELDVALUE(passedict, prog->fieldoffsets.dphitcontentsmask);
  60                 if (val && val->_float)
  61                         return (int)val->_float;
  62                 else if (passedict->fields.server->solid == SOLID_SLIDEBOX)
  63                 {
  64                         if ((int)passedict->fields.server->flags & FL_MONSTER)
  65                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
  66                         else
  67                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
  68                 }
  69                 else if (passedict->fields.server->solid == SOLID_CORPSE)
  70                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
  71                 else if (passedict->fields.server->solid == SOLID_TRIGGER)
  72                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
  73                 else
  74                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
  75         }
  76         else
  77                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
  78 }
  79
  80 /*
  81 ==================
  82 SV_Move
  83 ==================
  84 */
  85 #if COLLISIONPARANOID >= 1
  86 trace_t SV_Move_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
  87 #else
  88 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
  89 #endif
  90 {
  91         vec3_t hullmins, hullmaxs;
  92         int i, bodysupercontents;
  93         int passedictprog;
  94         qboolean pointtrace;
  95         prvm_edict_t *traceowner, *touch;
  96         trace_t trace;
  97         // bounding box of entire move area
  98         vec3_t clipboxmins, clipboxmaxs;
  99         // size of the moving object
 100         vec3_t clipmins, clipmaxs;
 101         // size when clipping against monsters
 102         vec3_t clipmins2, clipmaxs2;
 103         // start and end origin of move
 104         vec3_t clipstart, clipend;
 105         // trace results
 106         trace_t cliptrace;
 107         // matrices to transform into/out of other entity's space
 108         matrix4x4_t matrix, imatrix;
 109         // model of other entity
 110         model_t *model;
 111         // list of entities to test for collisions
 112         int numtouchedicts;
 113         prvm_edict_t *touchedicts[MAX_EDICTS];
 114
 115         VectorCopy(start, clipstart);
 116         VectorCopy(end, clipend);
 117         VectorCopy(mins, clipmins);
 118         VectorCopy(maxs, clipmaxs);
 119         VectorCopy(mins, clipmins2);
 120         VectorCopy(maxs, clipmaxs2);
 121 #if COLLISIONPARANOID >= 3
 122         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
 123 #endif
 124
 125         // clip to world
 126         Collision_ClipToWorld(&cliptrace, sv.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 127         cliptrace.bmodelstartsolid = cliptrace.startsolid;
 128         if (cliptrace.startsolid || cliptrace.fraction < 1)
 129                 cliptrace.ent = prog->edicts;
 130         if (type == MOVE_WORLDONLY)
 131                 return cliptrace;
 132
 133         if (type == MOVE_MISSILE)
 134         {
 135                 // LordHavoc: modified this, was = -15, now -= 15
 136                 for (i = 0;i < 3;i++)
 137                 {
 138                         clipmins2[i] -= 15;
 139                         clipmaxs2[i] += 15;
 140                 }
 141         }
 142
 143         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
 144         if (sv.worldmodel && sv.worldmodel->brush.RoundUpToHullSize)
 145                 sv.worldmodel->brush.RoundUpToHullSize(sv.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
 146         else
 147         {
 148                 VectorCopy(clipmins, hullmins);
 149                 VectorCopy(clipmaxs, hullmaxs);
 150         }
 151
 152         // create the bounding box of the entire move
 153         for (i = 0;i < 3;i++)
 154         {
 155                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
 156                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
 157         }
 158
 159         // debug override to test against everything
 160         if (sv_debugmove.integer)
 161         {
 162                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
 163                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
 164         }
 165
 166         // if the passedict is world, make it NULL (to avoid two checks each time)
 167         if (passedict == prog->edicts)
 168                 passedict = NULL;
 169         // precalculate prog value for passedict for comparisons
 170         passedictprog = PRVM_EDICT_TO_PROG(passedict);
 171         // figure out whether this is a point trace for comparisons
 172         pointtrace = VectorCompare(clipmins, clipmaxs);
 173         // precalculate passedict's owner edict pointer for comparisons
 174         traceowner = passedict ? PRVM_PROG_TO_EDICT(passedict->fields.server->owner) : 0;
 175
 176         // clip to entities
 177         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 178         // the clip region, so we can skip culling checks in the loop below
 179         numtouchedicts = World_EntitiesInBox(&sv.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 180         if (numtouchedicts > MAX_EDICTS)
 181         {
 182                 // this never happens
 183                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 184                 numtouchedicts = MAX_EDICTS;
 185         }
 186         for (i = 0;i < numtouchedicts;i++)
 187         {
 188                 touch = touchedicts[i];
 189
 190                 if (touch->fields.server->solid < SOLID_BBOX)
 191                         continue;
 192                 if (type == MOVE_NOMONSTERS && touch->fields.server->solid != SOLID_BSP)
 193                         continue;
 194
 195                 if (passedict)
 196                 {
 197                         // don't clip against self
 198                         if (passedict == touch)
 199                                 continue;
 200                         // don't clip owned entities against owner
 201                         if (traceowner == touch)
 202                                 continue;
 203                         // don't clip owner against owned entities
 204                         if (passedictprog == touch->fields.server->owner)
 205                                 continue;
 206                         // don't clip points against points (they can't collide)
 207                         if (pointtrace && VectorCompare(touch->fields.server->mins, touch->fields.server->maxs) && (type != MOVE_MISSILE || !((int)touch->fields.server->flags & FL_MONSTER)))
 208                                 continue;
 209                 }
 210
 211                 bodysupercontents = touch->fields.server->solid == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 212
 213                 // might interact, so do an exact clip
 214                 model = NULL;
 215                 if ((int) touch->fields.server->solid == SOLID_BSP || type == MOVE_HITMODEL)
 216                 {
 217                         unsigned int modelindex = (unsigned int)touch->fields.server->modelindex;
 218                         // if the modelindex is 0, it shouldn't be SOLID_BSP!
 219                         if (modelindex > 0 && modelindex < MAX_MODELS)
 220                                 model = sv.models[(int)touch->fields.server->modelindex];
 221                 }
 222                 if (model)
 223                         Matrix4x4_CreateFromQuakeEntity(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2], touch->fields.server->angles[0], touch->fields.server->angles[1], touch->fields.server->angles[2], 1);
 224                 else
 225                         Matrix4x4_CreateTranslate(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2]);
 226                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 227                 if ((int)touch->fields.server->flags & FL_MONSTER)
 228                         Collision_ClipToGenericEntity(&trace, model, touch->fields.server->frame, touch->fields.server->mins, touch->fields.server->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
 229                 else
 230                         Collision_ClipToGenericEntity(&trace, model, touch->fields.server->frame, touch->fields.server->mins, touch->fields.server->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 231
 232                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, touch->fields.server->solid == SOLID_BSP);
 233         }
 234
 235         return cliptrace;
 236 }
 237
 238 #if COLLISIONPARANOID >= 1
 239 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
 240 {
 241         int endstuck;
 242         trace_t trace;
 243         vec3_t temp;
 244         trace = SV_Move_(start, mins, maxs, end, type, passedict, hitsupercontentsmask);
 245         if (passedict)
 246         {
 247                 VectorCopy(trace.endpos, temp);
 248                 endstuck = SV_Move_(temp, mins, maxs, temp, type, passedict, hitsupercontentsmask).startsolid;
 249 #if COLLISIONPARANOID < 3
 250                 if (trace.startsolid || endstuck)
 251 #endif
 252                         Con_Printf("%s{e%i:%f %f %f:%f %f %f:%f:%f %f %f%s%s}\n", (trace.startsolid || endstuck) ? "^3" : "", passedict ? (int)(passedict - prog->edicts) : -1, passedict->fields.server->origin[0], passedict->fields.server->origin[1], passedict->fields.server->origin[2], end[0] - passedict->fields.server->origin[0], end[1] - passedict->fields.server->origin[1], end[2] - passedict->fields.server->origin[2], trace.fraction, trace.endpos[0] - passedict->fields.server->origin[0], trace.endpos[1] - passedict->fields.server->origin[1], trace.endpos[2] - passedict->fields.server->origin[2], trace.startsolid ? " startstuck" : "", endstuck ? " endstuck" : "");
 253         }
 254         return trace;
 255 }
 256 #endif
 257
 258 int SV_PointSuperContents(const vec3_t point)
 259 {
 260         int supercontents = 0;
 261         int i;
 262         prvm_edict_t *touch;
 263         vec3_t transformed;
 264         // matrices to transform into/out of other entity's space
 265         matrix4x4_t matrix, imatrix;
 266         // model of other entity
 267         model_t *model;
 268         unsigned int modelindex;
 269         int frame;
 270         // list of entities to test for collisions
 271         int numtouchedicts;
 272         prvm_edict_t *touchedicts[MAX_EDICTS];
 273
 274         // get world supercontents at this point
 275         if (sv.worldmodel && sv.worldmodel->PointSuperContents)
 276                 supercontents = sv.worldmodel->PointSuperContents(sv.worldmodel, 0, point);
 277
 278         // if sv_gameplayfix_swiminbmodels is off we're done
 279         if (!sv_gameplayfix_swiminbmodels.integer)
 280                 return supercontents;
 281
 282         // get list of entities at this point
 283         numtouchedicts = World_EntitiesInBox(&sv.world, point, point, MAX_EDICTS, touchedicts);
 284         if (numtouchedicts > MAX_EDICTS)
 285         {
 286                 // this never happens
 287                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 288                 numtouchedicts = MAX_EDICTS;
 289         }
 290         for (i = 0;i < numtouchedicts;i++)
 291         {
 292                 touch = touchedicts[i];
 293
 294                 // we only care about SOLID_BSP for pointcontents
 295                 if (touch->fields.server->solid != SOLID_BSP)
 296                         continue;
 297
 298                 // might interact, so do an exact clip
 299                 modelindex = (unsigned int)touch->fields.server->modelindex;
 300                 if (modelindex >= MAX_MODELS)
 301                         continue;
 302                 model = sv.models[(int)touch->fields.server->modelindex];
 303                 if (!model || !model->PointSuperContents)
 304                         continue;
 305                 Matrix4x4_CreateFromQuakeEntity(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2], touch->fields.server->angles[0], touch->fields.server->angles[1], touch->fields.server->angles[2], 1);
 306                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 307                 Matrix4x4_Transform(&imatrix, point, transformed);
 308                 frame = (int)touch->fields.server->frame;
 309                 supercontents |= model->PointSuperContents(model, bound(0, frame, (model->numframes - 1)), transformed);
 310         }
 311
 312         return supercontents;
 313 }
 314
 315 /*
 316 ===============================================================================
 317
 318 Linking entities into the world culling system
 319
 320 ===============================================================================
 321 */
 322
 323 void SV_LinkEdict_TouchAreaGrid(prvm_edict_t *ent)
 324 {
 325         int i, numtouchedicts, old_self, old_other;
 326         prvm_edict_t *touch, *touchedicts[MAX_EDICTS];
 327
 328         // build a list of edicts to touch, because the link loop can be corrupted
 329         // by IncreaseEdicts called during touch functions
 330         numtouchedicts = World_EntitiesInBox(&sv.world, ent->priv.server->areamins, ent->priv.server->areamaxs, MAX_EDICTS, touchedicts);
 331         if (numtouchedicts > MAX_EDICTS)
 332         {
 333                 // this never happens
 334                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 335                 numtouchedicts = MAX_EDICTS;
 336         }
 337
 338         old_self = prog->globals.server->self;
 339         old_other = prog->globals.server->other;
 340         for (i = 0;i < numtouchedicts;i++)
 341         {
 342                 touch = touchedicts[i];
 343                 if (touch != ent && (int)touch->fields.server->solid == SOLID_TRIGGER && touch->fields.server->touch)
 344                 {
 345                         prvm_eval_t *val;
 346                         prog->globals.server->self = PRVM_EDICT_TO_PROG(touch);
 347                         prog->globals.server->other = PRVM_EDICT_TO_PROG(ent);
 348                         prog->globals.server->time = sv.time;
 349                         prog->globals.server->trace_allsolid = false;
 350                         prog->globals.server->trace_startsolid = false;
 351                         prog->globals.server->trace_fraction = 1;
 352                         prog->globals.server->trace_inwater = false;
 353                         prog->globals.server->trace_inopen = true;
 354                         VectorCopy (touch->fields.server->origin, prog->globals.server->trace_endpos);
 355                         VectorSet (prog->globals.server->trace_plane_normal, 0, 0, 1);
 356                         prog->globals.server->trace_plane_dist = 0;
 357                         prog->globals.server->trace_ent = PRVM_EDICT_TO_PROG(ent);
 358                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dpstartcontents)))
 359                                 val->_float = 0;
 360                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitcontents)))
 361                                 val->_float = 0;
 362                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitq3surfaceflags)))
 363                                 val->_float = 0;
 364                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphittexturename)))
 365                                 val->string = 0;
 366                         PRVM_ExecuteProgram (touch->fields.server->touch, "QC function self.touch is missing");
 367                 }
 368         }
 369         prog->globals.server->self = old_self;
 370         prog->globals.server->other = old_other;
 371 }
 372
 373 /*
 374 ===============
 375 SV_LinkEdict
 376
 377 ===============
 378 */
 379 void SV_LinkEdict (prvm_edict_t *ent, qboolean touch_triggers)
 380 {
 381         model_t *model;
 382         vec3_t mins, maxs;
 383
 384         if (ent == prog->edicts)
 385                 return;         // don't add the world
 386
 387         if (ent->priv.server->free)
 388                 return;
 389
 390 // set the abs box
 391
 392         if (ent->fields.server->solid == SOLID_BSP)
 393         {
 394                 int modelindex = (int)ent->fields.server->modelindex;
 395                 if (modelindex < 0 || modelindex > MAX_MODELS)
 396                 {
 397                         Con_Printf("edict %i: SOLID_BSP with invalid modelindex!\n", PRVM_NUM_FOR_EDICT(ent));
 398                         modelindex = 0;
 399                 }
 400                 model = sv.models[modelindex];
 401                 if (model != NULL)
 402                 {
 403                         if (!model->TraceBox && developer.integer >= 1)
 404                                 Con_Printf("edict %i: SOLID_BSP with non-collidable model\n", PRVM_NUM_FOR_EDICT(ent));
 405
 406                         if (ent->fields.server->angles[0] || ent->fields.server->angles[2] || ent->fields.server->avelocity[0] || ent->fields.server->avelocity[2])
 407                         {
 408                                 VectorAdd(ent->fields.server->origin, model->rotatedmins, mins);
 409                                 VectorAdd(ent->fields.server->origin, model->rotatedmaxs, maxs);
 410                         }
 411                         else if (ent->fields.server->angles[1] || ent->fields.server->avelocity[1])
 412                         {
 413                                 VectorAdd(ent->fields.server->origin, model->yawmins, mins);
 414                                 VectorAdd(ent->fields.server->origin, model->yawmaxs, maxs);
 415                         }
 416                         else
 417                         {
 418                                 VectorAdd(ent->fields.server->origin, model->normalmins, mins);
 419                                 VectorAdd(ent->fields.server->origin, model->normalmaxs, maxs);
 420                         }
 421                 }
 422                 else
 423                 {
 424                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
 425                         VectorAdd(ent->fields.server->origin, ent->fields.server->mins, mins);
 426                         VectorAdd(ent->fields.server->origin, ent->fields.server->maxs, maxs);
 427                 }
 428         }
 429         else
 430         {
 431                 VectorAdd(ent->fields.server->origin, ent->fields.server->mins, mins);
 432                 VectorAdd(ent->fields.server->origin, ent->fields.server->maxs, maxs);
 433         }
 434
 435 //
 436 // to make items easier to pick up and allow them to be grabbed off
 437 // of shelves, the abs sizes are expanded
 438 //
 439         if ((int)ent->fields.server->flags & FL_ITEM)
 440         {
 441                 mins[0] -= 15;
 442                 mins[1] -= 15;
 443                 mins[2] -= 1;
 444                 maxs[0] += 15;
 445                 maxs[1] += 15;
 446                 maxs[2] += 1;
 447         }
 448         else
 449         {
 450                 // because movement is clipped an epsilon away from an actual edge,
 451                 // we must fully check even when bounding boxes don't quite touch
 452                 mins[0] -= 1;
 453                 mins[1] -= 1;
 454                 mins[2] -= 1;
 455                 maxs[0] += 1;
 456                 maxs[1] += 1;
 457                 maxs[2] += 1;
 458         }
 459
 460         VectorCopy(mins, ent->fields.server->absmin);
 461         VectorCopy(maxs, ent->fields.server->absmax);
 462
 463         World_LinkEdict(&sv.world, ent, mins, maxs);
 464
 465         // if touch_triggers, call touch on all entities overlapping this box
 466         if (touch_triggers && ent->fields.server->solid != SOLID_NOT)
 467                 SV_LinkEdict_TouchAreaGrid(ent);
 468 }
 469
 470 /*
 471 ===============================================================================
 472
 473 Utility functions
 474
 475 ===============================================================================
 476 */
 477
 478 /*
 479 ============
 480 SV_TestEntityPosition
 481
 482 returns true if the entity is in solid currently
 483 ============
 484 */
 485 static int SV_TestEntityPosition (prvm_edict_t *ent, vec3_t offset)
 486 {
 487         vec3_t org;
 488         trace_t trace;
 489         VectorAdd(ent->fields.server->origin, offset, org);
 490         trace = SV_Move (org, ent->fields.server->mins, ent->fields.server->maxs, ent->fields.server->origin, MOVE_NOMONSTERS, ent, SUPERCONTENTS_SOLID);
 491         if (trace.startsupercontents & SUPERCONTENTS_SOLID)
 492                 return true;
 493         else
 494         {
 495                 if (sv.worldmodel->brushq1.numclipnodes && !VectorCompare(ent->fields.server->mins, ent->fields.server->maxs))
 496                 {
 497                         // q1bsp/hlbsp use hulls and if the entity does not exactly match
 498                         // a hull size it is incorrectly tested, so this code tries to
 499                         // 'fix' it slightly...
 500                         // FIXME: this breaks entities larger than the hull size
 501                         int i;
 502                         vec3_t v, m1, m2, s;
 503                         VectorAdd(org, ent->fields.server->mins, m1);
 504                         VectorAdd(org, ent->fields.server->maxs, m2);
 505                         VectorSubtract(m2, m1, s);
 506 #define EPSILON (1.0f / 32.0f)
 507                         if (s[0] >= EPSILON*2) {m1[0] += EPSILON;m2[0] -= EPSILON;}
 508                         if (s[1] >= EPSILON*2) {m1[1] += EPSILON;m2[1] -= EPSILON;}
 509                         if (s[2] >= EPSILON*2) {m1[2] += EPSILON;m2[2] -= EPSILON;}
 510                         for (i = 0;i < 8;i++)
 511                         {
 512                                 v[0] = (i & 1) ? m2[0] : m1[0];
 513                                 v[1] = (i & 2) ? m2[1] : m1[1];
 514                                 v[2] = (i & 4) ? m2[2] : m1[2];
 515                                 if (SV_PointSuperContents(v) & SUPERCONTENTS_SOLID)
 516                                         return true;
 517                         }
 518                 }
 519         }
 520         // if the trace found a better position for the entity, move it there
 521         if (VectorDistance2(trace.endpos, ent->fields.server->origin) >= 0.0001)
 522                 VectorCopy(trace.endpos, ent->fields.server->origin);
 523         return false;
 524 }
 525
 526 /*
 527 ================
 528 SV_CheckAllEnts
 529 ================
 530 */
 531 void SV_CheckAllEnts (void)
 532 {
 533         int e;
 534         prvm_edict_t *check;
 535
 536         // see if any solid entities are inside the final position
 537         check = PRVM_NEXT_EDICT(prog->edicts);
 538         for (e = 1;e < prog->num_edicts;e++, check = PRVM_NEXT_EDICT(check))
 539         {
 540                 if (check->priv.server->free)
 541                         continue;
 542                 if (check->fields.server->movetype == MOVETYPE_PUSH
 543                  || check->fields.server->movetype == MOVETYPE_NONE
 544                  || check->fields.server->movetype == MOVETYPE_FOLLOW
 545                  || check->fields.server->movetype == MOVETYPE_NOCLIP)
 546                         continue;
 547
 548                 if (SV_TestEntityPosition (check, vec3_origin))
 549                         Con_Print("entity in invalid position\n");
 550         }
 551 }
 552
 553 // DRESK - Support for Entity Contents Transition Event
 554 /*
 555 ================
 556 SV_CheckContentsTransition
 557
 558 returns true if entity had a valid contentstransition function call
 559 ================
 560 */
 561 int SV_CheckContentsTransition(prvm_edict_t *ent, const int nContents)
 562 {
 563         int bValidFunctionCall;
 564         prvm_eval_t *contentstransition;
 565
 566         // Default Valid Function Call to False
 567         bValidFunctionCall = false;
 568
 569         if(ent->fields.server->watertype != nContents)
 570         { // Changed Contents
 571                 // Acquire Contents Transition Function from QC
 572                 contentstransition = PRVM_EDICTFIELDVALUE(ent, prog->fieldoffsets.contentstransition);
 573
 574                 if(contentstransition->function)
 575                 { // Valid Function; Execute
 576                         // Assign Valid Function
 577                         bValidFunctionCall = true;
 578                         // Prepare Parameters (Original Contents, New Contents)
 579                                 // Original Contents
 580                                 PRVM_G_FLOAT(OFS_PARM0) = ent->fields.server->watertype;
 581                                 // New Contents
 582                                 PRVM_G_FLOAT(OFS_PARM1) = nContents;
 583                                 // Assign Self
 584                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
 585                         // Execute VM Function
 586                         PRVM_ExecuteProgram(contentstransition->function, "contentstransition: NULL function");
 587                 }
 588         }
 589
 590         // Return if Function Call was Valid
 591         return bValidFunctionCall;
 592 }
 593
 594
 595 /*
 596 ================
 597 SV_CheckVelocity
 598 ================
 599 */
 600 void SV_CheckVelocity (prvm_edict_t *ent)
 601 {
 602         int i;
 603         float wishspeed;
 604
 605 //
 606 // bound velocity
 607 //
 608         for (i=0 ; i<3 ; i++)
 609         {
 610                 if (IS_NAN(ent->fields.server->velocity[i]))
 611                 {
 612                         Con_Printf("Got a NaN velocity on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(ent->fields.server->classname));
 613                         ent->fields.server->velocity[i] = 0;
 614                 }
 615                 if (IS_NAN(ent->fields.server->origin[i]))
 616                 {
 617                         Con_Printf("Got a NaN origin on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(ent->fields.server->classname));
 618                         ent->fields.server->origin[i] = 0;
 619                 }
 620         }
 621
 622         // LordHavoc: max velocity fix, inspired by Maddes's source fixes, but this is faster
 623         wishspeed = DotProduct(ent->fields.server->velocity, ent->fields.server->velocity);
 624         if (wishspeed > sv_maxvelocity.value * sv_maxvelocity.value)
 625         {
 626                 wishspeed = sv_maxvelocity.value / sqrt(wishspeed);
 627                 ent->fields.server->velocity[0] *= wishspeed;
 628                 ent->fields.server->velocity[1] *= wishspeed;
 629                 ent->fields.server->velocity[2] *= wishspeed;
 630         }
 631 }
 632
 633 /*
 634 =============
 635 SV_RunThink
 636
 637 Runs thinking code if time.  There is some play in the exact time the think
 638 function will be called, because it is called before any movement is done
 639 in a frame.  Not used for pushmove objects, because they must be exact.
 640 Returns false if the entity removed itself.
 641 =============
 642 */
 643 qboolean SV_RunThink (prvm_edict_t *ent)
 644 {
 645         int iterations;
 646
 647         // don't let things stay in the past.
 648         // it is possible to start that way by a trigger with a local time.
 649         if (ent->fields.server->nextthink <= 0 || ent->fields.server->nextthink > sv.time + sv.frametime)
 650                 return true;
 651
 652         for (iterations = 0;iterations < 128  && !ent->priv.server->free;iterations++)
 653         {
 654                 prog->globals.server->time = max(sv.time, ent->fields.server->nextthink);
 655                 ent->fields.server->nextthink = 0;
 656                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
 657                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
 658                 PRVM_ExecuteProgram (ent->fields.server->think, "QC function self.think is missing");
 659                 // mods often set nextthink to time to cause a think every frame,
 660                 // we don't want to loop in that case, so exit if the new nextthink is
 661                 // <= the time the qc was told, also exit if it is past the end of the
 662                 // frame
 663                 if (ent->fields.server->nextthink <= prog->globals.server->time || ent->fields.server->nextthink > sv.time + sv.frametime || !sv_gameplayfix_multiplethinksperframe.integer)
 664                         break;
 665         }
 666         return !ent->priv.server->free;
 667 }
 668
 669 /*
 670 ==================
 671 SV_Impact
 672
 673 Two entities have touched, so run their touch functions
 674 ==================
 675 */
 676 extern void VM_SetTraceGlobals(const trace_t *trace);
 677 extern sizebuf_t vm_tempstringsbuf;
 678 void SV_Impact (prvm_edict_t *e1, trace_t *trace)
 679 {
 680         int restorevm_tempstringsbuf_cursize;
 681         int old_self, old_other;
 682         prvm_edict_t *e2 = (prvm_edict_t *)trace->ent;
 683         prvm_eval_t *val;
 684
 685         old_self = prog->globals.server->self;
 686         old_other = prog->globals.server->other;
 687         restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 688
 689         VM_SetTraceGlobals(trace);
 690
 691         prog->globals.server->time = sv.time;
 692         if (!e1->priv.server->free && !e2->priv.server->free && e1->fields.server->touch && e1->fields.server->solid != SOLID_NOT)
 693         {
 694                 prog->globals.server->self = PRVM_EDICT_TO_PROG(e1);
 695                 prog->globals.server->other = PRVM_EDICT_TO_PROG(e2);
 696                 PRVM_ExecuteProgram (e1->fields.server->touch, "QC function self.touch is missing");
 697         }
 698
 699         if (!e1->priv.server->free && !e2->priv.server->free && e2->fields.server->touch && e2->fields.server->solid != SOLID_NOT)
 700         {
 701                 prog->globals.server->self = PRVM_EDICT_TO_PROG(e2);
 702                 prog->globals.server->other = PRVM_EDICT_TO_PROG(e1);
 703                 VectorCopy(e2->fields.server->origin, prog->globals.server->trace_endpos);
 704                 VectorNegate(trace->plane.normal, prog->globals.server->trace_plane_normal);
 705                 prog->globals.server->trace_plane_dist = -trace->plane.dist;
 706                 prog->globals.server->trace_ent = PRVM_EDICT_TO_PROG(e1);
 707                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dpstartcontents)))
 708                         val->_float = 0;
 709                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitcontents)))
 710                         val->_float = 0;
 711                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitq3surfaceflags)))
 712                         val->_float = 0;
 713                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphittexturename)))
 714                         val->string = 0;
 715                 PRVM_ExecuteProgram (e2->fields.server->touch, "QC function self.touch is missing");
 716         }
 717
 718         prog->globals.server->self = old_self;
 719         prog->globals.server->other = old_other;
 720         vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 721 }
 722
 723
 724 /*
 725 ==================
 726 ClipVelocity
 727
 728 Slide off of the impacting object
 729 returns the blocked flags (1 = floor, 2 = step / wall)
 730 ==================
 731 */
 732 #define STOP_EPSILON 0.1
 733 void ClipVelocity (vec3_t in, vec3_t normal, vec3_t out, float overbounce)
 734 {
 735         int i;
 736         float backoff;
 737
 738         backoff = -DotProduct (in, normal) * overbounce;
 739         VectorMA(in, backoff, normal, out);
 740
 741         for (i = 0;i < 3;i++)
 742                 if (out[i] > -STOP_EPSILON && out[i] < STOP_EPSILON)
 743                         out[i] = 0;
 744 }
 745
 746
 747 /*
 748 ============
 749 SV_FlyMove
 750
 751 The basic solid body movement clip that slides along multiple planes
 752 Returns the clipflags if the velocity was modified (hit something solid)
 753 1 = floor
 754 2 = wall / step
 755 4 = dead stop
 756 If stepnormal is not NULL, the plane normal of any vertical wall hit will be stored
 757 ============
 758 */
 759 // LordHavoc: increased from 5 to 32
 760 #define MAX_CLIP_PLANES 32
 761 int SV_FlyMove (prvm_edict_t *ent, float time, float *stepnormal, int hitsupercontentsmask)
 762 {
 763         int blocked, bumpcount;
 764         int i, j, impact, numplanes;
 765         float d, time_left;
 766         vec3_t dir, end, planes[MAX_CLIP_PLANES], primal_velocity, original_velocity, new_velocity;
 767         trace_t trace;
 768         if (time <= 0)
 769                 return 0;
 770         blocked = 0;
 771         VectorCopy(ent->fields.server->velocity, original_velocity);
 772         VectorCopy(ent->fields.server->velocity, primal_velocity);
 773         numplanes = 0;
 774         time_left = time;
 775         for (bumpcount = 0;bumpcount < MAX_CLIP_PLANES;bumpcount++)
 776         {
 777                 if (!ent->fields.server->velocity[0] && !ent->fields.server->velocity[1] && !ent->fields.server->velocity[2])
 778                         break;
 779
 780                 VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
 781                 trace = SV_Move(ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
 782 #if 0
 783                 //if (trace.fraction < 0.002)
 784                 {
 785 #if 1
 786                         vec3_t start;
 787                         trace_t testtrace;
 788                         VectorCopy(ent->fields.server->origin, start);
 789                         start[2] += 3;//0.03125;
 790                         VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
 791                         end[2] += 3;//0.03125;
 792                         testtrace = SV_Move(start, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
 793                         if (trace.fraction < testtrace.fraction && !testtrace.startsolid && (testtrace.fraction == 1 || DotProduct(trace.plane.normal, ent->fields.server->velocity) < DotProduct(testtrace.plane.normal, ent->fields.server->velocity)))
 794                         {
 795                                 Con_Printf("got further (new %f > old %f)\n", testtrace.fraction, trace.fraction);
 796                                 trace = testtrace;
 797                         }
 798 #endif
 799 #if 0
 800                         //j = -1;
 801                         for (i = 0;i < numplanes;i++)
 802                         {
 803                                 VectorCopy(ent->fields.server->origin, start);
 804                                 VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
 805                                 VectorMA(start, 3, planes[i], start);
 806                                 VectorMA(end, 3, planes[i], end);
 807                                 testtrace = SV_Move(start, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
 808                                 if (trace.fraction < testtrace.fraction)
 809                                 {
 810                                         trace = testtrace;
 811                                         VectorCopy(start, ent->fields.server->origin);
 812                                         //j = i;
 813                                 }
 814                         }
 815                         //if (j >= 0)
 816                         //      VectorAdd(ent->fields.server->origin, planes[j], start);
 817 #endif
 818                 }
 819 #endif
 820
 821 #if 0
 822                 Con_Printf("entity %i bump %i: velocity %f %f %f trace %f", ent - prog->edicts, bumpcount, ent->fields.server->velocity[0], ent->fields.server->velocity[1], ent->fields.server->velocity[2], trace.fraction);
 823                 if (trace.fraction < 1)
 824                         Con_Printf(" : %f %f %f", trace.plane.normal[0], trace.plane.normal[1], trace.plane.normal[2]);
 825                 Con_Print("\n");
 826 #endif
 827
 828 #if 0
 829                 if (trace.bmodelstartsolid)
 830                 {
 831                         // LordHavoc: note: this code is what makes entities stick in place
 832                         // if embedded in world only (you can walk through other objects if
 833                         // stuck)
 834                         // entity is trapped in another solid
 835                         VectorClear(ent->fields.server->velocity);
 836                         return 3;
 837                 }
 838 #endif
 839
 840                 // break if it moved the entire distance
 841                 if (trace.fraction == 1)
 842                 {
 843                         VectorCopy(trace.endpos, ent->fields.server->origin);
 844                         break;
 845                 }
 846
 847                 if (!trace.ent)
 848                 {
 849                         Con_Printf ("SV_FlyMove: !trace.ent");
 850                         trace.ent = prog->edicts;
 851                 }
 852
 853                 impact = !((int) ent->fields.server->flags & FL_ONGROUND) || ent->fields.server->groundentity != PRVM_EDICT_TO_PROG(trace.ent);
 854
 855                 if (trace.plane.normal[2])
 856                 {
 857                         if (trace.plane.normal[2] > 0.7)
 858                         {
 859                                 // floor
 860                                 blocked |= 1;
 861                                 ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
 862                                 ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
 863                         }
 864                 }
 865                 else
 866                 {
 867                         // step
 868                         blocked |= 2;
 869                         // save the trace for player extrafriction
 870                         if (stepnormal)
 871                                 VectorCopy(trace.plane.normal, stepnormal);
 872                 }
 873
 874                 if (trace.fraction >= 0.001)
 875                 {
 876                         // actually covered some distance
 877                         VectorCopy(trace.endpos, ent->fields.server->origin);
 878                         VectorCopy(ent->fields.server->velocity, original_velocity);
 879                         numplanes = 0;
 880                 }
 881
 882                 // run the impact function
 883                 if (impact)
 884                 {
 885                         SV_Impact(ent, &trace);
 886
 887                         // break if removed by the impact function
 888                         if (ent->priv.server->free)
 889                                 break;
 890                 }
 891
 892                 time_left *= 1 - trace.fraction;
 893
 894                 // clipped to another plane
 895                 if (numplanes >= MAX_CLIP_PLANES)
 896                 {
 897                         // this shouldn't really happen
 898                         VectorClear(ent->fields.server->velocity);
 899                         blocked = 3;
 900                         break;
 901                 }
 902
 903                 /*
 904                 for (i = 0;i < numplanes;i++)
 905                         if (DotProduct(trace.plane.normal, planes[i]) > 0.99)
 906                                 break;
 907                 if (i < numplanes)
 908                 {
 909                         VectorAdd(ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity);
 910                         continue;
 911                 }
 912                 */
 913
 914                 VectorCopy(trace.plane.normal, planes[numplanes]);
 915                 numplanes++;
 916
 917                 if (sv_newflymove.integer)
 918                         ClipVelocity(ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1);
 919                 else
 920                 {
 921                         // modify original_velocity so it parallels all of the clip planes
 922                         for (i = 0;i < numplanes;i++)
 923                         {
 924                                 ClipVelocity(original_velocity, planes[i], new_velocity, 1);
 925                                 for (j = 0;j < numplanes;j++)
 926                                 {
 927                                         if (j != i)
 928                                         {
 929                                                 // not ok
 930                                                 if (DotProduct(new_velocity, planes[j]) < 0)
 931                                                         break;
 932                                         }
 933                                 }
 934                                 if (j == numplanes)
 935                                         break;
 936                         }
 937
 938                         if (i != numplanes)
 939                         {
 940                                 // go along this plane
 941                                 VectorCopy(new_velocity, ent->fields.server->velocity);
 942                         }
 943                         else
 944                         {
 945                                 // go along the crease
 946                                 if (numplanes != 2)
 947                                 {
 948                                         VectorClear(ent->fields.server->velocity);
 949                                         blocked = 7;
 950                                         break;
 951                                 }
 952                                 CrossProduct(planes[0], planes[1], dir);
 953                                 // LordHavoc: thanks to taniwha of QuakeForge for pointing out this fix for slowed falling in corners
 954                                 VectorNormalize(dir);
 955                                 d = DotProduct(dir, ent->fields.server->velocity);
 956                                 VectorScale(dir, d, ent->fields.server->velocity);
 957                         }
 958                 }
 959
 960                 // if current velocity is against the original velocity,
 961                 // stop dead to avoid tiny occilations in sloping corners
 962                 if (DotProduct(ent->fields.server->velocity, primal_velocity) <= 0)
 963                 {
 964                         VectorClear(ent->fields.server->velocity);
 965                         break;
 966                 }
 967         }
 968
 969         //Con_Printf("entity %i final: blocked %i velocity %f %f %f\n", ent - prog->edicts, blocked, ent->fields.server->velocity[0], ent->fields.server->velocity[1], ent->fields.server->velocity[2]);
 970
 971         /*
 972         if ((blocked & 1) == 0 && bumpcount > 1)
 973         {
 974                 // LordHavoc: fix the 'fall to your death in a wedge corner' glitch
 975                 // flag ONGROUND if there's ground under it
 976                 trace = SV_Move(ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
 977         }
 978         */
 979
 980         // LordHavoc: this came from QW and allows you to get out of water more easily
 981         if (sv_gameplayfix_easierwaterjump.integer && ((int)ent->fields.server->flags & FL_WATERJUMP))
 982                 VectorCopy(primal_velocity, ent->fields.server->velocity);
 983         return blocked;
 984 }
 985
 986 /*
 987 ============
 988 SV_AddGravity
 989
 990 ============
 991 */
 992 void SV_AddGravity (prvm_edict_t *ent)
 993 {
 994         float ent_gravity;
 995         prvm_eval_t *val;
 996
 997         val = PRVM_EDICTFIELDVALUE(ent, prog->fieldoffsets.gravity);
 998         if (val!=0 && val->_float)
 999                 ent_gravity = val->_float;
1000         else
1001                 ent_gravity = 1.0;
1002         ent->fields.server->velocity[2] -= ent_gravity * sv_gravity.value * sv.frametime;
1003 }
1004
1005
1006 /*
1007 ===============================================================================
1008
1009 PUSHMOVE
1010
1011 ===============================================================================
1012 */
1013
1014 /*
1015 ============
1016 SV_PushEntity
1017
1018 Does not change the entities velocity at all
1019 ============
1020 */
1021 static trace_t SV_PushEntity (prvm_edict_t *ent, vec3_t push, qboolean failonbmodelstartsolid)
1022 {
1023         int type;
1024         trace_t trace;
1025         vec3_t end;
1026
1027         VectorAdd (ent->fields.server->origin, push, end);
1028
1029         if (ent->fields.server->movetype == MOVETYPE_FLYMISSILE)
1030                 type = MOVE_MISSILE;
1031         else if (ent->fields.server->solid == SOLID_TRIGGER || ent->fields.server->solid == SOLID_NOT)
1032                 type = MOVE_NOMONSTERS; // only clip against bmodels
1033         else
1034                 type = MOVE_NORMAL;
1035
1036         trace = SV_Move (ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent));
1037         if (trace.bmodelstartsolid && failonbmodelstartsolid)
1038                 return trace;
1039
1040         VectorCopy (trace.endpos, ent->fields.server->origin);
1041         SV_LinkEdict (ent, true);
1042
1043         if (ent->fields.server->solid >= SOLID_TRIGGER && trace.ent && (!((int)ent->fields.server->flags & FL_ONGROUND) || ent->fields.server->groundentity != PRVM_EDICT_TO_PROG(trace.ent)))
1044                 SV_Impact (ent, &trace);
1045         return trace;
1046 }
1047
1048
1049 /*
1050 ============
1051 SV_PushMove
1052
1053 ============
1054 */
1055 void SV_PushMove (prvm_edict_t *pusher, float movetime)
1056 {
1057         int i, e, index;
1058         int checkcontents;
1059         qboolean rotated;
1060         float savesolid, movetime2, pushltime;
1061         vec3_t mins, maxs, move, move1, moveangle, pushorig, pushang, a, forward, left, up, org;
1062         int num_moved;
1063         int numcheckentities;
1064         static prvm_edict_t *checkentities[MAX_EDICTS];
1065         model_t *pushermodel;
1066         trace_t trace;
1067         matrix4x4_t pusherfinalmatrix, pusherfinalimatrix;
1068         unsigned short moved_edicts[MAX_EDICTS];
1069
1070         if (!pusher->fields.server->velocity[0] && !pusher->fields.server->velocity[1] && !pusher->fields.server->velocity[2] && !pusher->fields.server->avelocity[0] && !pusher->fields.server->avelocity[1] && !pusher->fields.server->avelocity[2])
1071         {
1072                 pusher->fields.server->ltime += movetime;
1073                 return;
1074         }
1075
1076         switch ((int) pusher->fields.server->solid)
1077         {
1078         // LordHavoc: valid pusher types
1079         case SOLID_BSP:
1080         case SOLID_BBOX:
1081         case SOLID_SLIDEBOX:
1082         case SOLID_CORPSE: // LordHavoc: this would be weird...
1083                 break;
1084         // LordHavoc: no collisions
1085         case SOLID_NOT:
1086         case SOLID_TRIGGER:
1087                 VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1088                 VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1089                 pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1090                 pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1091                 pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1092                 pusher->fields.server->ltime += movetime;
1093                 SV_LinkEdict (pusher, false);
1094                 return;
1095         default:
1096                 Con_Printf("SV_PushMove: entity #%i, unrecognized solid type %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->solid);
1097                 return;
1098         }
1099         index = (int) pusher->fields.server->modelindex;
1100         if (index < 1 || index >= MAX_MODELS)
1101         {
1102                 Con_Printf("SV_PushMove: entity #%i has an invalid modelindex %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->modelindex);
1103                 return;
1104         }
1105         pushermodel = sv.models[index];
1106
1107         rotated = VectorLength2(pusher->fields.server->angles) + VectorLength2(pusher->fields.server->avelocity) > 0;
1108
1109         movetime2 = movetime;
1110         VectorScale(pusher->fields.server->velocity, movetime2, move1);
1111         VectorScale(pusher->fields.server->avelocity, movetime2, moveangle);
1112         if (moveangle[0] || moveangle[2])
1113         {
1114                 for (i = 0;i < 3;i++)
1115                 {
1116                         if (move1[i] > 0)
1117                         {
1118                                 mins[i] = pushermodel->rotatedmins[i] + pusher->fields.server->origin[i] - 1;
1119                                 maxs[i] = pushermodel->rotatedmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1120                         }
1121                         else
1122                         {
1123                                 mins[i] = pushermodel->rotatedmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1124                                 maxs[i] = pushermodel->rotatedmaxs[i] + pusher->fields.server->origin[i] + 1;
1125                         }
1126                 }
1127         }
1128         else if (moveangle[1])
1129         {
1130                 for (i = 0;i < 3;i++)
1131                 {
1132                         if (move1[i] > 0)
1133                         {
1134                                 mins[i] = pushermodel->yawmins[i] + pusher->fields.server->origin[i] - 1;
1135                                 maxs[i] = pushermodel->yawmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1136                         }
1137                         else
1138                         {
1139                                 mins[i] = pushermodel->yawmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1140                                 maxs[i] = pushermodel->yawmaxs[i] + pusher->fields.server->origin[i] + 1;
1141                         }
1142                 }
1143         }
1144         else
1145         {
1146                 for (i = 0;i < 3;i++)
1147                 {
1148                         if (move1[i] > 0)
1149                         {
1150                                 mins[i] = pushermodel->normalmins[i] + pusher->fields.server->origin[i] - 1;
1151                                 maxs[i] = pushermodel->normalmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1152                         }
1153                         else
1154                         {
1155                                 mins[i] = pushermodel->normalmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1156                                 maxs[i] = pushermodel->normalmaxs[i] + pusher->fields.server->origin[i] + 1;
1157                         }
1158                 }
1159         }
1160
1161         VectorNegate (moveangle, a);
1162         AngleVectorsFLU (a, forward, left, up);
1163
1164         VectorCopy (pusher->fields.server->origin, pushorig);
1165         VectorCopy (pusher->fields.server->angles, pushang);
1166         pushltime = pusher->fields.server->ltime;
1167
1168 // move the pusher to its final position
1169
1170         VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1171         VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1172         pusher->fields.server->ltime += movetime;
1173         SV_LinkEdict (pusher, false);
1174
1175         pushermodel = NULL;
1176         if (pusher->fields.server->modelindex >= 1 && pusher->fields.server->modelindex < MAX_MODELS)
1177                 pushermodel = sv.models[(int)pusher->fields.server->modelindex];
1178         Matrix4x4_CreateFromQuakeEntity(&pusherfinalmatrix, pusher->fields.server->origin[0], pusher->fields.server->origin[1], pusher->fields.server->origin[2], pusher->fields.server->angles[0], pusher->fields.server->angles[1], pusher->fields.server->angles[2], 1);
1179         Matrix4x4_Invert_Simple(&pusherfinalimatrix, &pusherfinalmatrix);
1180
1181         savesolid = pusher->fields.server->solid;
1182
1183 // see if any solid entities are inside the final position
1184         num_moved = 0;
1185
1186         numcheckentities = World_EntitiesInBox(&sv.world, mins, maxs, MAX_EDICTS, checkentities);
1187         for (e = 0;e < numcheckentities;e++)
1188         {
1189                 prvm_edict_t *check = checkentities[e];
1190                 if (check->fields.server->movetype == MOVETYPE_NONE
1191                  || check->fields.server->movetype == MOVETYPE_PUSH
1192                  || check->fields.server->movetype == MOVETYPE_FOLLOW
1193                  || check->fields.server->movetype == MOVETYPE_NOCLIP
1194                  || check->fields.server->movetype == MOVETYPE_FAKEPUSH)
1195                         continue;
1196
1197                 //Con_Printf("%i %s ", PRVM_NUM_FOR_EDICT(check), PRVM_GetString(check->fields.server->classname));
1198
1199                 // tell any MOVETYPE_STEP entity that it may need to check for water transitions
1200                 check->priv.server->waterposition_forceupdate = true;
1201
1202                 checkcontents = SV_GenericHitSuperContentsMask(check);
1203
1204                 // if the entity is standing on the pusher, it will definitely be moved
1205                 // if the entity is not standing on the pusher, but is in the pusher's
1206                 // final position, move it
1207                 if (!((int)check->fields.server->flags & FL_ONGROUND) || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher)
1208                 {
1209                         Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1210                         //trace = SV_Move(check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, MOVE_NOMONSTERS, check, checkcontents);
1211                         if (!trace.startsolid)
1212                         {
1213                                 //Con_Printf("- not in solid\n");
1214                                 continue;
1215                         }
1216                 }
1217
1218                 if (rotated)
1219                 {
1220                         vec3_t org2;
1221                         VectorSubtract (check->fields.server->origin, pusher->fields.server->origin, org);
1222                         org2[0] = DotProduct (org, forward);
1223                         org2[1] = DotProduct (org, left);
1224                         org2[2] = DotProduct (org, up);
1225                         VectorSubtract (org2, org, move);
1226                         VectorAdd (move, move1, move);
1227                 }
1228                 else
1229                         VectorCopy (move1, move);
1230
1231                 //Con_Printf("- pushing %f %f %f\n", move[0], move[1], move[2]);
1232
1233                 VectorCopy (check->fields.server->origin, check->priv.server->moved_from);
1234                 VectorCopy (check->fields.server->angles, check->priv.server->moved_fromangles);
1235                 moved_edicts[num_moved++] = PRVM_NUM_FOR_EDICT(check);
1236
1237                 // try moving the contacted entity
1238                 pusher->fields.server->solid = SOLID_NOT;
1239                 trace = SV_PushEntity (check, move, true);
1240                 // FIXME: turn players specially
1241                 check->fields.server->angles[1] += trace.fraction * moveangle[1];
1242                 pusher->fields.server->solid = savesolid; // was SOLID_BSP
1243                 //Con_Printf("%s:%d frac %f startsolid %d bmodelstartsolid %d allsolid %d\n", __FILE__, __LINE__, trace.fraction, trace.startsolid, trace.bmodelstartsolid, trace.allsolid);
1244
1245                 // this trace.fraction < 1 check causes items to fall off of pushers
1246                 // if they pass under or through a wall
1247                 // the groundentity check causes items to fall off of ledges
1248                 if (check->fields.server->movetype != MOVETYPE_WALK && (trace.fraction < 1 || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher))
1249                         check->fields.server->flags = (int)check->fields.server->flags & ~FL_ONGROUND;
1250
1251                 // if it is still inside the pusher, block
1252                 Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1253                 if (trace.startsolid)
1254                 {
1255                         // try moving the contacted entity a tiny bit further to account for precision errors
1256                         vec3_t move2;
1257                         pusher->fields.server->solid = SOLID_NOT;
1258                         VectorScale(move, 1.1, move2);
1259                         VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1260                         VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1261                         SV_PushEntity (check, move2, true);
1262                         pusher->fields.server->solid = savesolid;
1263                         Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1264                         if (trace.startsolid)
1265                         {
1266                                 // try moving the contacted entity a tiny bit less to account for precision errors
1267                                 pusher->fields.server->solid = SOLID_NOT;
1268                                 VectorScale(move, 0.9, move2);
1269                                 VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1270                                 VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1271                                 SV_PushEntity (check, move2, true);
1272                                 pusher->fields.server->solid = savesolid;
1273                                 Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1274                                 if (trace.startsolid)
1275                                 {
1276                                         // still inside pusher, so it's really blocked
1277
1278                                         // fail the move
1279                                         if (check->fields.server->mins[0] == check->fields.server->maxs[0])
1280                                                 continue;
1281                                         if (check->fields.server->solid == SOLID_NOT || check->fields.server->solid == SOLID_TRIGGER)
1282                                         {
1283                                                 // corpse
1284                                                 check->fields.server->mins[0] = check->fields.server->mins[1] = 0;
1285                                                 VectorCopy (check->fields.server->mins, check->fields.server->maxs);
1286                                                 continue;
1287                                         }
1288
1289                                         VectorCopy (pushorig, pusher->fields.server->origin);
1290                                         VectorCopy (pushang, pusher->fields.server->angles);
1291                                         pusher->fields.server->ltime = pushltime;
1292                                         SV_LinkEdict (pusher, false);
1293
1294                                         // move back any entities we already moved
1295                                         for (i = 0;i < num_moved;i++)
1296                                         {
1297                                                 prvm_edict_t *ed = PRVM_EDICT_NUM(moved_edicts[i]);
1298                                                 VectorCopy (ed->priv.server->moved_from, ed->fields.server->origin);
1299                                                 VectorCopy (ed->priv.server->moved_fromangles, ed->fields.server->angles);
1300                                                 SV_LinkEdict (ed, false);
1301                                         }
1302
1303                                         // if the pusher has a "blocked" function, call it, otherwise just stay in place until the obstacle is gone
1304                                         if (pusher->fields.server->blocked)
1305                                         {
1306                                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(pusher);
1307                                                 prog->globals.server->other = PRVM_EDICT_TO_PROG(check);
1308                                                 PRVM_ExecuteProgram (pusher->fields.server->blocked, "QC function self.blocked is missing");
1309                                         }
1310                                         break;
1311                                 }
1312                         }
1313                 }
1314         }
1315         pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1316         pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1317         pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1318 }
1319
1320 /*
1321 ================
1322 SV_Physics_Pusher
1323
1324 ================
1325 */
1326 void SV_Physics_Pusher (prvm_edict_t *ent)
1327 {
1328         float thinktime, oldltime, movetime;
1329
1330         oldltime = ent->fields.server->ltime;
1331
1332         thinktime = ent->fields.server->nextthink;
1333         if (thinktime < ent->fields.server->ltime + sv.frametime)
1334         {
1335                 movetime = thinktime - ent->fields.server->ltime;
1336                 if (movetime < 0)
1337                         movetime = 0;
1338         }
1339         else
1340                 movetime = sv.frametime;
1341
1342         if (movetime)
1343                 // advances ent->fields.server->ltime if not blocked
1344                 SV_PushMove (ent, movetime);
1345
1346         if (thinktime > oldltime && thinktime <= ent->fields.server->ltime)
1347         {
1348                 ent->fields.server->nextthink = 0;
1349                 prog->globals.server->time = sv.time;
1350                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
1351                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
1352                 PRVM_ExecuteProgram (ent->fields.server->think, "QC function self.think is missing");
1353         }
1354 }
1355
1356
1357 /*
1358 ===============================================================================
1359
1360 CLIENT MOVEMENT
1361
1362 ===============================================================================
1363 */
1364
1365 static float unstickoffsets[] =
1366 {
1367         -1,  0,  0,
1368          1,  0,  0,
1369          0, -1,  0,
1370          0,  1,  0,
1371         -1, -1,  0,
1372          1, -1,  0,
1373         -1,  1,  0,
1374          1,  1,  0,
1375          0,  0,  -1,
1376          0,  0,  1,
1377          0,  0,  2,
1378          0,  0,  3,
1379          0,  0,  4,
1380          0,  0,  5,
1381          0,  0,  6,
1382          0,  0,  7,
1383          0,  0,  8,
1384          0,  0,  9,
1385          0,  0,  10,
1386          0,  0,  11,
1387          0,  0,  12,
1388          0,  0,  13,
1389          0,  0,  14,
1390          0,  0,  15,
1391          0,  0,  16,
1392          0,  0,  17,
1393 };
1394
1395 /*
1396 =============
1397 SV_CheckStuck
1398
1399 This is a big hack to try and fix the rare case of getting stuck in the world
1400 clipping hull.
1401 =============
1402 */
1403 void SV_CheckStuck (prvm_edict_t *ent)
1404 {
1405         int i;
1406         vec3_t offset;
1407
1408         if (!SV_TestEntityPosition(ent, vec3_origin))
1409         {
1410                 VectorCopy (ent->fields.server->origin, ent->fields.server->oldorigin);
1411                 return;
1412         }
1413
1414         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1415         {
1416                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1417                 {
1418                         Con_DPrintf("Unstuck player entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname), unstickoffsets[i+0], unstickoffsets[i+1], unstickoffsets[i+2]);
1419                         SV_LinkEdict (ent, true);
1420                         return;
1421                 }
1422         }
1423
1424         VectorSubtract(ent->fields.server->oldorigin, ent->fields.server->origin, offset);
1425         if (!SV_TestEntityPosition(ent, offset))
1426         {
1427                 Con_DPrintf("Unstuck player entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1428                 SV_LinkEdict (ent, true);
1429                 return;
1430         }
1431
1432         Con_DPrintf("Stuck player entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1433 }
1434
1435 static void SV_UnstickEntity (prvm_edict_t *ent)
1436 {
1437         int i;
1438
1439         // if not stuck in a bmodel, just return
1440         if (!SV_TestEntityPosition(ent, vec3_origin))
1441                 return;
1442
1443         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1444         {
1445                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1446                 {
1447                         Con_DPrintf("Unstuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname), unstickoffsets[i+0], unstickoffsets[i+1], unstickoffsets[i+2]);
1448                         SV_LinkEdict (ent, true);
1449                         return;
1450                 }
1451         }
1452
1453         if (developer.integer >= 100)
1454                 Con_Printf("Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1455 }
1456
1457
1458 /*
1459 =============
1460 SV_CheckWater
1461 =============
1462 */
1463 qboolean SV_CheckWater (prvm_edict_t *ent)
1464 {
1465         int cont;
1466         int nNativeContents;
1467         vec3_t point;
1468
1469         point[0] = ent->fields.server->origin[0];
1470         point[1] = ent->fields.server->origin[1];
1471         point[2] = ent->fields.server->origin[2] + ent->fields.server->mins[2] + 1;
1472
1473         // DRESK - Support for Entity Contents Transition Event
1474         // NOTE: Some logic needed to be slightly re-ordered
1475         // to not affect performance and allow for the feature.
1476
1477         // Acquire Super Contents Prior to Resets
1478         cont = SV_PointSuperContents(point);
1479         // Acquire Native Contents Here
1480         nNativeContents = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, cont);
1481
1482         // DRESK - Support for Entity Contents Transition Event
1483         if(ent->fields.server->watertype)
1484                 // Entity did NOT Spawn; Check
1485                 SV_CheckContentsTransition(ent, nNativeContents);
1486
1487
1488         ent->fields.server->waterlevel = 0;
1489         ent->fields.server->watertype = CONTENTS_EMPTY;
1490         cont = SV_PointSuperContents(point);
1491         if (cont & (SUPERCONTENTS_LIQUIDSMASK))
1492         {
1493                 ent->fields.server->watertype = nNativeContents;
1494                 ent->fields.server->waterlevel = 1;
1495                 point[2] = ent->fields.server->origin[2] + (ent->fields.server->mins[2] + ent->fields.server->maxs[2])*0.5;
1496                 if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1497                 {
1498                         ent->fields.server->waterlevel = 2;
1499                         point[2] = ent->fields.server->origin[2] + ent->fields.server->view_ofs[2];
1500                         if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1501                                 ent->fields.server->waterlevel = 3;
1502                 }
1503         }
1504
1505         return ent->fields.server->waterlevel > 1;
1506 }
1507
1508 /*
1509 ============
1510 SV_WallFriction
1511
1512 ============
1513 */
1514 void SV_WallFriction (prvm_edict_t *ent, float *stepnormal)
1515 {
1516         float d, i;
1517         vec3_t forward, into, side;
1518
1519         AngleVectors (ent->fields.server->v_angle, forward, NULL, NULL);
1520         if ((d = DotProduct (stepnormal, forward) + 0.5) < 0)
1521         {
1522                 // cut the tangential velocity
1523                 i = DotProduct (stepnormal, ent->fields.server->velocity);
1524                 VectorScale (stepnormal, i, into);
1525                 VectorSubtract (ent->fields.server->velocity, into, side);
1526                 ent->fields.server->velocity[0] = side[0] * (1 + d);
1527                 ent->fields.server->velocity[1] = side[1] * (1 + d);
1528         }
1529 }
1530
1531 #if 0
1532 /*
1533 =====================
1534 SV_TryUnstick
1535
1536 Player has come to a dead stop, possibly due to the problem with limited
1537 float precision at some angle joins in the BSP hull.
1538
1539 Try fixing by pushing one pixel in each direction.
1540
1541 This is a hack, but in the interest of good gameplay...
1542 ======================
1543 */
1544 int SV_TryUnstick (prvm_edict_t *ent, vec3_t oldvel)
1545 {
1546         int i, clip;
1547         vec3_t oldorg, dir;
1548
1549         VectorCopy (ent->fields.server->origin, oldorg);
1550         VectorClear (dir);
1551
1552         for (i=0 ; i<8 ; i++)
1553         {
1554                 // try pushing a little in an axial direction
1555                 switch (i)
1556                 {
1557                         case 0: dir[0] = 2; dir[1] = 0; break;
1558                         case 1: dir[0] = 0; dir[1] = 2; break;
1559                         case 2: dir[0] = -2; dir[1] = 0; break;
1560                         case 3: dir[0] = 0; dir[1] = -2; break;
1561                         case 4: dir[0] = 2; dir[1] = 2; break;
1562                         case 5: dir[0] = -2; dir[1] = 2; break;
1563                         case 6: dir[0] = 2; dir[1] = -2; break;
1564                         case 7: dir[0] = -2; dir[1] = -2; break;
1565                 }
1566
1567                 SV_PushEntity (ent, dir, false);
1568
1569                 // retry the original move
1570                 ent->fields.server->velocity[0] = oldvel[0];
1571                 ent->fields.server->velocity[1] = oldvel[1];
1572                 ent->fields.server->velocity[2] = 0;
1573                 clip = SV_FlyMove (ent, 0.1, NULL, SV_GenericHitSuperContentsMask(ent));
1574
1575                 if (fabs(oldorg[1] - ent->fields.server->origin[1]) > 4
1576                  || fabs(oldorg[0] - ent->fields.server->origin[0]) > 4)
1577                 {
1578                         Con_DPrint("TryUnstick - success.\n");
1579                         return clip;
1580                 }
1581
1582                 // go back to the original pos and try again
1583                 VectorCopy (oldorg, ent->fields.server->origin);
1584         }
1585
1586         // still not moving
1587         VectorClear (ent->fields.server->velocity);
1588         Con_DPrint("TryUnstick - failure.\n");
1589         return 7;
1590 }
1591 #endif
1592
1593 /*
1594 =====================
1595 SV_WalkMove
1596
1597 Only used by players
1598 ======================
1599 */
1600 void SV_WalkMove (prvm_edict_t *ent)
1601 {
1602         int clip, oldonground, originalmove_clip, originalmove_flags, originalmove_groundentity, hitsupercontentsmask;
1603         vec3_t upmove, downmove, start_origin, start_velocity, stepnormal, originalmove_origin, originalmove_velocity;
1604         trace_t downtrace;
1605
1606         // if frametime is 0 (due to client sending the same timestamp twice),
1607         // don't move
1608         if (sv.frametime <= 0)
1609                 return;
1610
1611         hitsupercontentsmask = SV_GenericHitSuperContentsMask(ent);
1612
1613         SV_CheckVelocity(ent);
1614
1615         // do a regular slide move unless it looks like you ran into a step
1616         oldonground = (int)ent->fields.server->flags & FL_ONGROUND;
1617
1618         VectorCopy (ent->fields.server->origin, start_origin);
1619         VectorCopy (ent->fields.server->velocity, start_velocity);
1620
1621         clip = SV_FlyMove (ent, sv.frametime, NULL, hitsupercontentsmask);
1622
1623         // if the move did not hit the ground at any point, we're not on ground
1624         if (!(clip & 1))
1625                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1626
1627         SV_CheckVelocity(ent);
1628
1629         VectorCopy(ent->fields.server->origin, originalmove_origin);
1630         VectorCopy(ent->fields.server->velocity, originalmove_velocity);
1631         originalmove_clip = clip;
1632         originalmove_flags = (int)ent->fields.server->flags;
1633         originalmove_groundentity = ent->fields.server->groundentity;
1634
1635         if ((int)ent->fields.server->flags & FL_WATERJUMP)
1636                 return;
1637
1638         if (sv_nostep.integer)
1639                 return;
1640
1641         // if move didn't block on a step, return
1642         if (clip & 2)
1643         {
1644                 // if move was not trying to move into the step, return
1645                 if (fabs(start_velocity[0]) < 0.03125 && fabs(start_velocity[1]) < 0.03125)
1646                         return;
1647
1648                 if (ent->fields.server->movetype != MOVETYPE_FLY)
1649                 {
1650                         // return if gibbed by a trigger
1651                         if (ent->fields.server->movetype != MOVETYPE_WALK)
1652                                 return;
1653
1654                         // only step up while jumping if that is enabled
1655                         if (!(sv_jumpstep.integer && sv_gameplayfix_stepwhilejumping.integer))
1656                                 if (!oldonground && ent->fields.server->waterlevel == 0)
1657                                         return;
1658                 }
1659
1660                 // try moving up and forward to go up a step
1661                 // back to start pos
1662                 VectorCopy (start_origin, ent->fields.server->origin);
1663                 VectorCopy (start_velocity, ent->fields.server->velocity);
1664
1665                 // move up
1666                 VectorClear (upmove);
1667                 upmove[2] = sv_stepheight.value;
1668                 // FIXME: don't link?
1669                 SV_PushEntity(ent, upmove, false);
1670
1671                 // move forward
1672                 ent->fields.server->velocity[2] = 0;
1673                 clip = SV_FlyMove (ent, sv.frametime, stepnormal, hitsupercontentsmask);
1674                 ent->fields.server->velocity[2] += start_velocity[2];
1675
1676                 SV_CheckVelocity(ent);
1677
1678                 // check for stuckness, possibly due to the limited precision of floats
1679                 // in the clipping hulls
1680                 if (clip
1681                  && fabs(originalmove_origin[1] - ent->fields.server->origin[1]) < 0.03125
1682                  && fabs(originalmove_origin[0] - ent->fields.server->origin[0]) < 0.03125)
1683                 {
1684                         //Con_Printf("wall\n");
1685                         // stepping up didn't make any progress, revert to original move
1686                         VectorCopy(originalmove_origin, ent->fields.server->origin);
1687                         VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1688                         //clip = originalmove_clip;
1689                         ent->fields.server->flags = originalmove_flags;
1690                         ent->fields.server->groundentity = originalmove_groundentity;
1691                         // now try to unstick if needed
1692                         //clip = SV_TryUnstick (ent, oldvel);
1693                         return;
1694                 }
1695
1696                 //Con_Printf("step - ");
1697
1698                 // extra friction based on view angle
1699                 if (clip & 2 && sv_wallfriction.integer)
1700                         SV_WallFriction (ent, stepnormal);
1701         }
1702         // don't do the down move if stepdown is disabled, moving upward, not in water, or the move started offground or ended onground
1703         else if (!sv_gameplayfix_stepdown.integer || ent->fields.server->waterlevel >= 3 || start_velocity[2] >= (1.0 / 32.0) || !oldonground || ((int)ent->fields.server->flags & FL_ONGROUND))
1704                 return;
1705
1706         // move down
1707         VectorClear (downmove);
1708         downmove[2] = -sv_stepheight.value + start_velocity[2]*sv.frametime;
1709         // FIXME: don't link?
1710         downtrace = SV_PushEntity (ent, downmove, false);
1711
1712         if (downtrace.fraction < 1 && downtrace.plane.normal[2] > 0.7)
1713         {
1714                 // this has been disabled so that you can't jump when you are stepping
1715                 // up while already jumping (also known as the Quake2 double jump bug)
1716 #if 0
1717                 // LordHavoc: disabled this check so you can walk on monsters/players
1718                 //if (ent->fields.server->solid == SOLID_BSP)
1719                 {
1720                         //Con_Printf("onground\n");
1721                         ent->fields.server->flags =     (int)ent->fields.server->flags | FL_ONGROUND;
1722                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(downtrace.ent);
1723                 }
1724 #endif
1725         }
1726         else
1727         {
1728                 //Con_Printf("slope\n");
1729                 // if the push down didn't end up on good ground, use the move without
1730                 // the step up.  This happens near wall / slope combinations, and can
1731                 // cause the player to hop up higher on a slope too steep to climb
1732                 VectorCopy(originalmove_origin, ent->fields.server->origin);
1733                 VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1734                 //clip = originalmove_clip;
1735                 ent->fields.server->flags = originalmove_flags;
1736                 ent->fields.server->groundentity = originalmove_groundentity;
1737         }
1738
1739         SV_CheckVelocity(ent);
1740 }
1741
1742 //============================================================================
1743
1744 /*
1745 =============
1746 SV_Physics_Follow
1747
1748 Entities that are "stuck" to another entity
1749 =============
1750 */
1751 void SV_Physics_Follow (prvm_edict_t *ent)
1752 {
1753         vec3_t vf, vr, vu, angles, v;
1754         prvm_edict_t *e;
1755
1756         // regular thinking
1757         if (!SV_RunThink (ent))
1758                 return;
1759
1760         // LordHavoc: implemented rotation on MOVETYPE_FOLLOW objects
1761         e = PRVM_PROG_TO_EDICT(ent->fields.server->aiment);
1762         if (e->fields.server->angles[0] == ent->fields.server->punchangle[0] && e->fields.server->angles[1] == ent->fields.server->punchangle[1] && e->fields.server->angles[2] == ent->fields.server->punchangle[2])
1763         {
1764                 // quick case for no rotation
1765                 VectorAdd(e->fields.server->origin, ent->fields.server->view_ofs, ent->fields.server->origin);
1766         }
1767         else
1768         {
1769                 angles[0] = -ent->fields.server->punchangle[0];
1770                 angles[1] =  ent->fields.server->punchangle[1];
1771                 angles[2] =  ent->fields.server->punchangle[2];
1772                 AngleVectors (angles, vf, vr, vu);
1773                 v[0] = ent->fields.server->view_ofs[0] * vf[0] + ent->fields.server->view_ofs[1] * vr[0] + ent->fields.server->view_ofs[2] * vu[0];
1774                 v[1] = ent->fields.server->view_ofs[0] * vf[1] + ent->fields.server->view_ofs[1] * vr[1] + ent->fields.server->view_ofs[2] * vu[1];
1775                 v[2] = ent->fields.server->view_ofs[0] * vf[2] + ent->fields.server->view_ofs[1] * vr[2] + ent->fields.server->view_ofs[2] * vu[2];
1776                 angles[0] = -e->fields.server->angles[0];
1777                 angles[1] =  e->fields.server->angles[1];
1778                 angles[2] =  e->fields.server->angles[2];
1779                 AngleVectors (angles, vf, vr, vu);
1780                 ent->fields.server->origin[0] = v[0] * vf[0] + v[1] * vf[1] + v[2] * vf[2] + e->fields.server->origin[0];
1781                 ent->fields.server->origin[1] = v[0] * vr[0] + v[1] * vr[1] + v[2] * vr[2] + e->fields.server->origin[1];
1782                 ent->fields.server->origin[2] = v[0] * vu[0] + v[1] * vu[1] + v[2] * vu[2] + e->fields.server->origin[2];
1783         }
1784         VectorAdd (e->fields.server->angles, ent->fields.server->v_angle, ent->fields.server->angles);
1785         SV_LinkEdict (ent, true);
1786 }
1787
1788 /*
1789 ==============================================================================
1790
1791 TOSS / BOUNCE
1792
1793 ==============================================================================
1794 */
1795
1796 /*
1797 =============
1798 SV_CheckWaterTransition
1799
1800 =============
1801 */
1802 void SV_CheckWaterTransition (prvm_edict_t *ent)
1803 {
1804         int cont;
1805         cont = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, SV_PointSuperContents(ent->fields.server->origin));
1806         if (!ent->fields.server->watertype)
1807         {
1808                 // just spawned here
1809                 ent->fields.server->watertype = cont;
1810                 ent->fields.server->waterlevel = 1;
1811                 return;
1812         }
1813
1814         // DRESK - Support for Entity Contents Transition Event
1815         // NOTE: Call here BEFORE updating the watertype below,
1816         // and suppress watersplash sound if a valid function
1817         // call was made to allow for custom "splash" sounds.
1818         if( !SV_CheckContentsTransition(ent, cont) )
1819         { // Contents Transition Function Invalid; Potentially Play Water Sound
1820                 // check if the entity crossed into or out of water
1821                 if (sv_sound_watersplash.string && ((ent->fields.server->watertype == CONTENTS_WATER || ent->fields.server->watertype == CONTENTS_SLIME) != (cont == CONTENTS_WATER || cont == CONTENTS_SLIME)))
1822                         SV_StartSound (ent, 0, sv_sound_watersplash.string, 255, 1);
1823         }
1824
1825         if (cont <= CONTENTS_WATER)
1826         {
1827                 ent->fields.server->watertype = cont;
1828                 ent->fields.server->waterlevel = 1;
1829         }
1830         else
1831         {
1832                 ent->fields.server->watertype = CONTENTS_EMPTY;
1833                 ent->fields.server->waterlevel = 0;
1834         }
1835 }
1836
1837 /*
1838 =============
1839 SV_Physics_Toss
1840
1841 Toss, bounce, and fly movement.  When onground, do nothing.
1842 =============
1843 */
1844 void SV_Physics_Toss (prvm_edict_t *ent)
1845 {
1846         trace_t trace;
1847         vec3_t move;
1848
1849 // if onground, return without moving
1850         if ((int)ent->fields.server->flags & FL_ONGROUND)
1851         {
1852                 if (ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer)
1853                 {
1854                         // don't stick to ground if onground and moving upward
1855                         ent->fields.server->flags -= FL_ONGROUND;
1856                 }
1857                 else if (!ent->fields.server->groundentity || !sv_gameplayfix_noairborncorpse.integer)
1858                 {
1859                         // we can trust FL_ONGROUND if groundentity is world because it never moves
1860                         return;
1861                 }
1862                 else if (ent->priv.server->suspendedinairflag && PRVM_PROG_TO_EDICT(ent->fields.server->groundentity)->priv.server->free)
1863                 {
1864                         // if ent was supported by a brush model on previous frame,
1865                         // and groundentity is now freed, set groundentity to 0 (world)
1866                         // which leaves it suspended in the air
1867                         ent->fields.server->groundentity = 0;
1868                         return;
1869                 }
1870         }
1871         ent->priv.server->suspendedinairflag = false;
1872
1873         SV_CheckVelocity (ent);
1874
1875 // add gravity
1876         if (ent->fields.server->movetype == MOVETYPE_TOSS || ent->fields.server->movetype == MOVETYPE_BOUNCE)
1877                 SV_AddGravity (ent);
1878
1879 // move angles
1880         VectorMA (ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
1881
1882 // move origin
1883         VectorScale (ent->fields.server->velocity, sv.frametime, move);
1884         trace = SV_PushEntity (ent, move, true);
1885         if (ent->priv.server->free)
1886                 return;
1887         if (trace.bmodelstartsolid)
1888         {
1889                 // try to unstick the entity
1890                 SV_UnstickEntity(ent);
1891                 trace = SV_PushEntity (ent, move, false);
1892                 if (ent->priv.server->free)
1893                         return;
1894         }
1895
1896         if (trace.fraction < 1)
1897         {
1898                 if (ent->fields.server->movetype == MOVETYPE_BOUNCEMISSILE)
1899                 {
1900                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 2.0);
1901                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1902                 }
1903                 else if (ent->fields.server->movetype == MOVETYPE_BOUNCE)
1904                 {
1905                         float d;
1906                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.5);
1907                         // LordHavoc: fixed grenades not bouncing when fired down a slope
1908                         if (sv_gameplayfix_grenadebouncedownslopes.integer)
1909                         {
1910                                 d = DotProduct(trace.plane.normal, ent->fields.server->velocity);
1911                                 if (trace.plane.normal[2] > 0.7 && fabs(d) < 60)
1912                                 {
1913                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1914                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1915                                         VectorClear (ent->fields.server->velocity);
1916                                         VectorClear (ent->fields.server->avelocity);
1917                                 }
1918                                 else
1919                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1920                         }
1921                         else
1922                         {
1923                                 if (trace.plane.normal[2] > 0.7 && ent->fields.server->velocity[2] < 60)
1924                                 {
1925                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1926                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1927                                         VectorClear (ent->fields.server->velocity);
1928                                         VectorClear (ent->fields.server->avelocity);
1929                                 }
1930                                 else
1931                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1932                         }
1933                 }
1934                 else
1935                 {
1936                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.0);
1937                         if (trace.plane.normal[2] > 0.7)
1938                         {
1939                                 ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1940                                 ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1941                                 if (((prvm_edict_t *)trace.ent)->fields.server->solid == SOLID_BSP)
1942                                         ent->priv.server->suspendedinairflag = true;
1943                                 VectorClear (ent->fields.server->velocity);
1944                                 VectorClear (ent->fields.server->avelocity);
1945                         }
1946                         else
1947                                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1948                 }
1949         }
1950
1951 // check for in water
1952         SV_CheckWaterTransition (ent);
1953 }
1954
1955 /*
1956 ===============================================================================
1957
1958 STEPPING MOVEMENT
1959
1960 ===============================================================================
1961 */
1962
1963 /*
1964 =============
1965 SV_Physics_Step
1966
1967 Monsters freefall when they don't have a ground entity, otherwise
1968 all movement is done with discrete steps.
1969
1970 This is also used for objects that have become still on the ground, but
1971 will fall if the floor is pulled out from under them.
1972 =============
1973 */
1974 void SV_Physics_Step (prvm_edict_t *ent)
1975 {
1976         int flags = (int)ent->fields.server->flags;
1977         // don't fall at all if fly/swim
1978         if (!(flags & (FL_FLY | FL_SWIM)))
1979         {
1980                 if (flags & FL_ONGROUND)
1981                 {
1982                         // freefall if onground and moving upward
1983                         // freefall if not standing on a world surface (it may be a lift or trap door)
1984                         if ((ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer) || ent->fields.server->groundentity)
1985                         {
1986                                 ent->fields.server->flags -= FL_ONGROUND;
1987                                 SV_AddGravity(ent);
1988                                 SV_CheckVelocity(ent);
1989                                 SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
1990                                 SV_LinkEdict(ent, true);
1991                                 ent->priv.server->waterposition_forceupdate = true;
1992                         }
1993                 }
1994                 else
1995                 {
1996                         // freefall if not onground
1997                         int hitsound = ent->fields.server->velocity[2] < sv_gravity.value * -0.1;
1998
1999                         SV_AddGravity(ent);
2000                         SV_CheckVelocity(ent);
2001                         SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
2002                         SV_LinkEdict(ent, true);
2003
2004                         // just hit ground
2005                         if (hitsound && (int)ent->fields.server->flags & FL_ONGROUND && sv_sound_land.string)
2006                                 SV_StartSound(ent, 0, sv_sound_land.string, 255, 1);
2007                         ent->priv.server->waterposition_forceupdate = true;
2008                 }
2009         }
2010
2011 // regular thinking
2012         if (!SV_RunThink(ent))
2013                 return;
2014
2015         if (ent->priv.server->waterposition_forceupdate || !VectorCompare(ent->fields.server->origin, ent->priv.server->waterposition_origin))
2016         {
2017                 ent->priv.server->waterposition_forceupdate = false;
2018                 VectorCopy(ent->fields.server->origin, ent->priv.server->waterposition_origin);
2019                 SV_CheckWaterTransition(ent);
2020         }
2021 }
2022
2023 //============================================================================
2024
2025 static void SV_Physics_Entity (prvm_edict_t *ent)
2026 {
2027         // don't run a move on newly spawned projectiles as it messes up movement
2028         // interpolation and rocket trails
2029         qboolean runmove = ent->priv.server->move;
2030         ent->priv.server->move = true;
2031         switch ((int) ent->fields.server->movetype)
2032         {
2033         case MOVETYPE_PUSH:
2034         case MOVETYPE_FAKEPUSH:
2035                 SV_Physics_Pusher (ent);
2036                 break;
2037         case MOVETYPE_NONE:
2038                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2039                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2040                         SV_RunThink (ent);
2041                 break;
2042         case MOVETYPE_FOLLOW:
2043                 SV_Physics_Follow (ent);
2044                 break;
2045         case MOVETYPE_NOCLIP:
2046                 if (SV_RunThink(ent))
2047                 {
2048                         SV_CheckWater(ent);
2049                         VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2050                         VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2051                 }
2052                 SV_LinkEdict(ent, false);
2053                 break;
2054         case MOVETYPE_STEP:
2055                 SV_Physics_Step (ent);
2056                 break;
2057         case MOVETYPE_WALK:
2058                 if (SV_RunThink (ent))
2059                 {
2060                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2061                                 SV_AddGravity (ent);
2062                         SV_CheckStuck (ent);
2063                         SV_WalkMove (ent);
2064                         SV_LinkEdict (ent, true);
2065                 }
2066                 break;
2067         case MOVETYPE_TOSS:
2068         case MOVETYPE_BOUNCE:
2069         case MOVETYPE_BOUNCEMISSILE:
2070         case MOVETYPE_FLYMISSILE:
2071         case MOVETYPE_FLY:
2072                 // regular thinking
2073                 if (SV_RunThink (ent) && (runmove || !sv_gameplayfix_delayprojectiles.integer))
2074                         SV_Physics_Toss (ent);
2075                 break;
2076         default:
2077                 Con_Printf ("SV_Physics: bad movetype %i\n", (int)ent->fields.server->movetype);
2078                 break;
2079         }
2080 }
2081
2082 void SV_Physics_ClientMove(void)
2083 {
2084         prvm_edict_t *ent;
2085         ent = host_client->edict;
2086
2087         // call player physics, this needs the proper frametime
2088         prog->globals.server->frametime = sv.frametime;
2089         SV_ClientThink();
2090
2091         // call standard client pre-think, with frametime = 0
2092         prog->globals.server->time = sv.time;
2093         prog->globals.server->frametime = 0;
2094         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2095         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2096         prog->globals.server->frametime = sv.frametime;
2097
2098         // make sure the velocity is sane (not a NaN)
2099         SV_CheckVelocity(ent);
2100         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2101         // player_run/player_stand1 does not horribly malfunction if the
2102         // velocity becomes a number that is both == 0 and != 0
2103         // (sounds to me like NaN but to be absolutely safe...)
2104         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2105                 VectorClear(ent->fields.server->velocity);
2106
2107         // perform MOVETYPE_WALK behavior
2108         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2109                 SV_AddGravity (ent);
2110         SV_CheckStuck (ent);
2111         SV_WalkMove (ent);
2112
2113         SV_CheckVelocity (ent);
2114
2115         SV_LinkEdict (ent, true);
2116
2117         SV_CheckVelocity (ent);
2118
2119         // call standard player post-think, with frametime = 0
2120         prog->globals.server->time = sv.time;
2121         prog->globals.server->frametime = 0;
2122         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2123         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2124         prog->globals.server->frametime = sv.frametime;
2125
2126         if(ent->fields.server->fixangle)
2127         {
2128                 // angle fixing was requested by physics code...
2129                 // so store the current angles for later use
2130                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2131                 host_client->fixangle_angles_set = TRUE;
2132
2133                 // and clear fixangle for the next frame
2134                 ent->fields.server->fixangle = 0;
2135         }
2136 }
2137
2138 void SV_Physics_ClientEntity(prvm_edict_t *ent)
2139 {
2140         // don't do physics on disconnected clients, FrikBot relies on this
2141         if (!host_client->spawned)
2142         {
2143                 memset(&host_client->cmd, 0, sizeof(host_client->cmd));
2144                 return;
2145         }
2146
2147         // don't run physics here if running asynchronously
2148         if (host_client->clmovement_skipphysicsframes <= 0)
2149                 SV_ClientThink();
2150
2151         // make sure the velocity is sane (not a NaN)
2152         SV_CheckVelocity(ent);
2153         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2154         // player_run/player_stand1 does not horribly malfunction if the
2155         // velocity becomes a number that is both == 0 and != 0
2156         // (sounds to me like NaN but to be absolutely safe...)
2157         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2158                 VectorClear(ent->fields.server->velocity);
2159
2160         // call standard client pre-think
2161         prog->globals.server->time = sv.time;
2162         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2163         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2164         SV_CheckVelocity (ent);
2165
2166         switch ((int) ent->fields.server->movetype)
2167         {
2168         case MOVETYPE_PUSH:
2169         case MOVETYPE_FAKEPUSH:
2170                 SV_Physics_Pusher (ent);
2171                 break;
2172         case MOVETYPE_NONE:
2173                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2174                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2175                         SV_RunThink (ent);
2176                 break;
2177         case MOVETYPE_FOLLOW:
2178                 SV_Physics_Follow (ent);
2179                 break;
2180         case MOVETYPE_NOCLIP:
2181                 SV_RunThink(ent);
2182                 SV_CheckWater(ent);
2183                 VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2184                 VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2185                 break;
2186         case MOVETYPE_STEP:
2187                 SV_Physics_Step (ent);
2188                 break;
2189         case MOVETYPE_WALK:
2190                 SV_RunThink (ent);
2191                 // don't run physics here if running asynchronously
2192                 if (host_client->clmovement_skipphysicsframes <= 0)
2193                 {
2194                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2195                                 SV_AddGravity (ent);
2196                         SV_CheckStuck (ent);
2197                         SV_WalkMove (ent);
2198                 }
2199                 break;
2200         case MOVETYPE_TOSS:
2201         case MOVETYPE_BOUNCE:
2202         case MOVETYPE_BOUNCEMISSILE:
2203         case MOVETYPE_FLYMISSILE:
2204                 // regular thinking
2205                 SV_RunThink (ent);
2206                 SV_Physics_Toss (ent);
2207                 break;
2208         case MOVETYPE_FLY:
2209                 SV_RunThink (ent);
2210                 SV_CheckWater (ent);
2211                 SV_WalkMove (ent);
2212                 break;
2213         default:
2214                 Con_Printf ("SV_Physics_ClientEntity: bad movetype %i\n", (int)ent->fields.server->movetype);
2215                 break;
2216         }
2217
2218         // decrement the countdown variable used to decide when to go back to
2219         // synchronous physics
2220         if (host_client->clmovement_skipphysicsframes > 0)
2221                 host_client->clmovement_skipphysicsframes--;
2222
2223         SV_CheckVelocity (ent);
2224
2225         SV_LinkEdict (ent, true);
2226
2227         SV_CheckVelocity (ent);
2228
2229         // call standard player post-think
2230         prog->globals.server->time = sv.time;
2231         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2232         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2233
2234         if(ent->fields.server->fixangle)
2235         {
2236                 // angle fixing was requested by physics code...
2237                 // so store the current angles for later use
2238                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2239                 host_client->fixangle_angles_set = TRUE;
2240
2241                 // and clear fixangle for the next frame
2242                 ent->fields.server->fixangle = 0;
2243         }
2244 }
2245
2246 /*
2247 ================
2248 SV_Physics
2249
2250 ================
2251 */
2252 void SV_Physics (void)
2253 {
2254         int i;
2255         prvm_edict_t *ent;
2256
2257 // let the progs know that a new frame has started
2258         prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2259         prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2260         prog->globals.server->time = sv.time;
2261         prog->globals.server->frametime = sv.frametime;
2262         PRVM_ExecuteProgram (prog->globals.server->StartFrame, "QC function StartFrame is missing");
2263
2264 //
2265 // treat each object in turn
2266 //
2267
2268         // if force_retouch, relink all the entities
2269         if (prog->globals.server->force_retouch > 0)
2270                 for (i = 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2271                         if (!ent->priv.server->free)
2272                                 SV_LinkEdict (ent, true);       // force retouch even for stationary
2273
2274         // run physics on the client entities
2275         for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
2276                 if (!ent->priv.server->free)
2277                                 SV_Physics_ClientEntity(ent);
2278
2279         // run physics on all the non-client entities
2280         if (!sv_freezenonclients.integer)
2281                 for (;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2282                         if (!ent->priv.server->free)
2283                                 SV_Physics_Entity(ent);
2284
2285         if (prog->globals.server->force_retouch > 0)
2286                 prog->globals.server->force_retouch = max(0, prog->globals.server->force_retouch - 1);
2287
2288         // LordHavoc: endframe support
2289         if (prog->funcoffsets.EndFrame)
2290         {
2291                 prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2292                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2293                 prog->globals.server->time = sv.time;
2294                 PRVM_ExecuteProgram (prog->funcoffsets.EndFrame, "QC function EndFrame is missing");
2295         }
2296
2297         // decrement prog->num_edicts if the highest number entities died
2298         for (;PRVM_EDICT_NUM(prog->num_edicts - 1)->priv.server->free;prog->num_edicts--);
2299
2300         if (!sv_freezenonclients.integer)
2301                 sv.time += sv.frametime;
2302 }