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         float savesolid, movetime2, pushltime;
1059         vec3_t mins, maxs, move, move1, moveangle, pushorig, pushang, a, forward, left, up, org;
1060         int num_moved;
1061         int numcheckentities;
1062         static prvm_edict_t *checkentities[MAX_EDICTS];
1063         model_t *pushermodel;
1064         trace_t trace;
1065         matrix4x4_t pusherfinalmatrix, pusherfinalimatrix;
1066         unsigned short moved_edicts[MAX_EDICTS];
1067
1068         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])
1069         {
1070                 pusher->fields.server->ltime += movetime;
1071                 return;
1072         }
1073
1074         switch ((int) pusher->fields.server->solid)
1075         {
1076         // LordHavoc: valid pusher types
1077         case SOLID_BSP:
1078         case SOLID_BBOX:
1079         case SOLID_SLIDEBOX:
1080         case SOLID_CORPSE: // LordHavoc: this would be weird...
1081                 break;
1082         // LordHavoc: no collisions
1083         case SOLID_NOT:
1084         case SOLID_TRIGGER:
1085                 VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1086                 VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1087                 pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1088                 pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1089                 pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1090                 pusher->fields.server->ltime += movetime;
1091                 SV_LinkEdict (pusher, false);
1092                 return;
1093         default:
1094                 Con_Printf("SV_PushMove: entity #%i, unrecognized solid type %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->solid);
1095                 return;
1096         }
1097         index = (int) pusher->fields.server->modelindex;
1098         if (index < 1 || index >= MAX_MODELS)
1099         {
1100                 Con_Printf("SV_PushMove: entity #%i has an invalid modelindex %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->modelindex);
1101                 return;
1102         }
1103         pushermodel = sv.models[index];
1104
1105         movetime2 = movetime;
1106         VectorScale(pusher->fields.server->velocity, movetime2, move1);
1107         VectorScale(pusher->fields.server->avelocity, movetime2, moveangle);
1108         if (moveangle[0] || moveangle[2])
1109         {
1110                 for (i = 0;i < 3;i++)
1111                 {
1112                         if (move1[i] > 0)
1113                         {
1114                                 mins[i] = pushermodel->rotatedmins[i] + pusher->fields.server->origin[i] - 1;
1115                                 maxs[i] = pushermodel->rotatedmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1116                         }
1117                         else
1118                         {
1119                                 mins[i] = pushermodel->rotatedmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1120                                 maxs[i] = pushermodel->rotatedmaxs[i] + pusher->fields.server->origin[i] + 1;
1121                         }
1122                 }
1123         }
1124         else if (moveangle[1])
1125         {
1126                 for (i = 0;i < 3;i++)
1127                 {
1128                         if (move1[i] > 0)
1129                         {
1130                                 mins[i] = pushermodel->yawmins[i] + pusher->fields.server->origin[i] - 1;
1131                                 maxs[i] = pushermodel->yawmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1132                         }
1133                         else
1134                         {
1135                                 mins[i] = pushermodel->yawmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1136                                 maxs[i] = pushermodel->yawmaxs[i] + pusher->fields.server->origin[i] + 1;
1137                         }
1138                 }
1139         }
1140         else
1141         {
1142                 for (i = 0;i < 3;i++)
1143                 {
1144                         if (move1[i] > 0)
1145                         {
1146                                 mins[i] = pushermodel->normalmins[i] + pusher->fields.server->origin[i] - 1;
1147                                 maxs[i] = pushermodel->normalmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1148                         }
1149                         else
1150                         {
1151                                 mins[i] = pushermodel->normalmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1152                                 maxs[i] = pushermodel->normalmaxs[i] + pusher->fields.server->origin[i] + 1;
1153                         }
1154                 }
1155         }
1156
1157         VectorNegate (moveangle, a);
1158         AngleVectorsFLU (a, forward, left, up);
1159
1160         VectorCopy (pusher->fields.server->origin, pushorig);
1161         VectorCopy (pusher->fields.server->angles, pushang);
1162         pushltime = pusher->fields.server->ltime;
1163
1164 // move the pusher to its final position
1165
1166         VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1167         VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1168         pusher->fields.server->ltime += movetime;
1169         SV_LinkEdict (pusher, false);
1170
1171         pushermodel = NULL;
1172         if (pusher->fields.server->modelindex >= 1 && pusher->fields.server->modelindex < MAX_MODELS)
1173                 pushermodel = sv.models[(int)pusher->fields.server->modelindex];
1174         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);
1175         Matrix4x4_Invert_Simple(&pusherfinalimatrix, &pusherfinalmatrix);
1176
1177         savesolid = pusher->fields.server->solid;
1178
1179 // see if any solid entities are inside the final position
1180         num_moved = 0;
1181
1182         numcheckentities = World_EntitiesInBox(&sv.world, mins, maxs, MAX_EDICTS, checkentities);
1183         for (e = 0;e < numcheckentities;e++)
1184         {
1185                 prvm_edict_t *check = checkentities[e];
1186                 int checkcontents = SV_GenericHitSuperContentsMask(check);
1187                 if (check->fields.server->movetype == MOVETYPE_NONE
1188                  || check->fields.server->movetype == MOVETYPE_PUSH
1189                  || check->fields.server->movetype == MOVETYPE_FOLLOW
1190                  || check->fields.server->movetype == MOVETYPE_NOCLIP
1191                  || check->fields.server->movetype == MOVETYPE_FAKEPUSH)
1192                         continue;
1193
1194                 // if the entity is standing on the pusher, it will definitely be moved
1195                 // if the entity is not standing on the pusher, but is in the pusher's
1196                 // final position, move it
1197                 if (!((int)check->fields.server->flags & FL_ONGROUND) || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher)
1198                 {
1199                         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);
1200                         if (!trace.startsolid)
1201                                 continue;
1202                 }
1203
1204
1205                 if (forward[0] != 1 || left[1] != 1) // quick way to check if any rotation is used
1206                 {
1207                         vec3_t org2;
1208                         VectorSubtract (check->fields.server->origin, pusher->fields.server->origin, org);
1209                         org2[0] = DotProduct (org, forward);
1210                         org2[1] = DotProduct (org, left);
1211                         org2[2] = DotProduct (org, up);
1212                         VectorSubtract (org2, org, move);
1213                         VectorAdd (move, move1, move);
1214                 }
1215                 else
1216                         VectorCopy (move1, move);
1217
1218                 VectorCopy (check->fields.server->origin, check->priv.server->moved_from);
1219                 VectorCopy (check->fields.server->angles, check->priv.server->moved_fromangles);
1220                 moved_edicts[num_moved++] = PRVM_NUM_FOR_EDICT(check);
1221
1222                 // try moving the contacted entity
1223                 pusher->fields.server->solid = SOLID_NOT;
1224                 trace = SV_PushEntity (check, move, true);
1225                 // FIXME: turn players specially
1226                 check->fields.server->angles[1] += trace.fraction * moveangle[1];
1227                 pusher->fields.server->solid = savesolid; // was SOLID_BSP
1228                 //Con_Printf("%s:%d frac %f startsolid %d bmodelstartsolid %d allsolid %d\n", __FILE__, __LINE__, trace.fraction, trace.startsolid, trace.bmodelstartsolid, trace.allsolid);
1229
1230                 // this trace.fraction < 1 check causes items to fall off of pushers
1231                 // if they pass under or through a wall
1232                 // the groundentity check causes items to fall off of ledges
1233                 if (check->fields.server->movetype != MOVETYPE_WALK && (trace.fraction < 1 || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher))
1234                         check->fields.server->flags = (int)check->fields.server->flags & ~FL_ONGROUND;
1235
1236                 // if it is still inside the pusher, block
1237                 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);
1238                 if (trace.startsolid)
1239                 {
1240                         // try moving the contacted entity a tiny bit further to account for precision errors
1241                         vec3_t move2;
1242                         pusher->fields.server->solid = SOLID_NOT;
1243                         VectorScale(move, 1.1, move2);
1244                         VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1245                         VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1246                         SV_PushEntity (check, move2, true);
1247                         pusher->fields.server->solid = savesolid;
1248                         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);
1249                         if (trace.startsolid)
1250                         {
1251                                 // try moving the contacted entity a tiny bit less to account for precision errors
1252                                 pusher->fields.server->solid = SOLID_NOT;
1253                                 VectorScale(move, 0.9, move2);
1254                                 VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1255                                 VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1256                                 SV_PushEntity (check, move2, true);
1257                                 pusher->fields.server->solid = savesolid;
1258                                 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);
1259                                 if (trace.startsolid)
1260                                 {
1261                                         // still inside pusher, so it's really blocked
1262
1263                                         // fail the move
1264                                         if (check->fields.server->mins[0] == check->fields.server->maxs[0])
1265                                                 continue;
1266                                         if (check->fields.server->solid == SOLID_NOT || check->fields.server->solid == SOLID_TRIGGER)
1267                                         {
1268                                                 // corpse
1269                                                 check->fields.server->mins[0] = check->fields.server->mins[1] = 0;
1270                                                 VectorCopy (check->fields.server->mins, check->fields.server->maxs);
1271                                                 continue;
1272                                         }
1273
1274                                         VectorCopy (pushorig, pusher->fields.server->origin);
1275                                         VectorCopy (pushang, pusher->fields.server->angles);
1276                                         pusher->fields.server->ltime = pushltime;
1277                                         SV_LinkEdict (pusher, false);
1278
1279                                         // move back any entities we already moved
1280                                         for (i = 0;i < num_moved;i++)
1281                                         {
1282                                                 prvm_edict_t *ed = PRVM_EDICT_NUM(moved_edicts[i]);
1283                                                 VectorCopy (ed->priv.server->moved_from, ed->fields.server->origin);
1284                                                 VectorCopy (ed->priv.server->moved_fromangles, ed->fields.server->angles);
1285                                                 SV_LinkEdict (ed, false);
1286                                         }
1287
1288                                         // if the pusher has a "blocked" function, call it, otherwise just stay in place until the obstacle is gone
1289                                         if (pusher->fields.server->blocked)
1290                                         {
1291                                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(pusher);
1292                                                 prog->globals.server->other = PRVM_EDICT_TO_PROG(check);
1293                                                 PRVM_ExecuteProgram (pusher->fields.server->blocked, "QC function self.blocked is missing");
1294                                         }
1295                                         break;
1296                                 }
1297                         }
1298                 }
1299         }
1300         pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1301         pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1302         pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1303 }
1304
1305 /*
1306 ================
1307 SV_Physics_Pusher
1308
1309 ================
1310 */
1311 void SV_Physics_Pusher (prvm_edict_t *ent)
1312 {
1313         float thinktime, oldltime, movetime;
1314
1315         oldltime = ent->fields.server->ltime;
1316
1317         thinktime = ent->fields.server->nextthink;
1318         if (thinktime < ent->fields.server->ltime + sv.frametime)
1319         {
1320                 movetime = thinktime - ent->fields.server->ltime;
1321                 if (movetime < 0)
1322                         movetime = 0;
1323         }
1324         else
1325                 movetime = sv.frametime;
1326
1327         if (movetime)
1328                 // advances ent->fields.server->ltime if not blocked
1329                 SV_PushMove (ent, movetime);
1330
1331         if (thinktime > oldltime && thinktime <= ent->fields.server->ltime)
1332         {
1333                 ent->fields.server->nextthink = 0;
1334                 prog->globals.server->time = sv.time;
1335                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
1336                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
1337                 PRVM_ExecuteProgram (ent->fields.server->think, "QC function self.think is missing");
1338         }
1339 }
1340
1341
1342 /*
1343 ===============================================================================
1344
1345 CLIENT MOVEMENT
1346
1347 ===============================================================================
1348 */
1349
1350 static float unstickoffsets[] =
1351 {
1352         -1,  0,  0,
1353          1,  0,  0,
1354          0, -1,  0,
1355          0,  1,  0,
1356         -1, -1,  0,
1357          1, -1,  0,
1358         -1,  1,  0,
1359          1,  1,  0,
1360          0,  0,  -1,
1361          0,  0,  1,
1362          0,  0,  2,
1363          0,  0,  3,
1364          0,  0,  4,
1365          0,  0,  5,
1366          0,  0,  6,
1367          0,  0,  7,
1368          0,  0,  8,
1369          0,  0,  9,
1370          0,  0,  10,
1371          0,  0,  11,
1372          0,  0,  12,
1373          0,  0,  13,
1374          0,  0,  14,
1375          0,  0,  15,
1376          0,  0,  16,
1377          0,  0,  17,
1378 };
1379
1380 /*
1381 =============
1382 SV_CheckStuck
1383
1384 This is a big hack to try and fix the rare case of getting stuck in the world
1385 clipping hull.
1386 =============
1387 */
1388 void SV_CheckStuck (prvm_edict_t *ent)
1389 {
1390         int i;
1391         vec3_t offset;
1392
1393         if (!SV_TestEntityPosition(ent, vec3_origin))
1394         {
1395                 VectorCopy (ent->fields.server->origin, ent->fields.server->oldorigin);
1396                 return;
1397         }
1398
1399         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1400         {
1401                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1402                 {
1403                         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]);
1404                         SV_LinkEdict (ent, true);
1405                         return;
1406                 }
1407         }
1408
1409         VectorSubtract(ent->fields.server->oldorigin, ent->fields.server->origin, offset);
1410         if (!SV_TestEntityPosition(ent, offset))
1411         {
1412                 Con_DPrintf("Unstuck player entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1413                 SV_LinkEdict (ent, true);
1414                 return;
1415         }
1416
1417         Con_DPrintf("Stuck player entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1418 }
1419
1420 static void SV_UnstickEntity (prvm_edict_t *ent)
1421 {
1422         int i;
1423
1424         // if not stuck in a bmodel, just return
1425         if (!SV_TestEntityPosition(ent, vec3_origin))
1426                 return;
1427
1428         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1429         {
1430                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1431                 {
1432                         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]);
1433                         SV_LinkEdict (ent, true);
1434                         return;
1435                 }
1436         }
1437
1438         if (developer.integer >= 100)
1439                 Con_Printf("Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1440 }
1441
1442
1443 /*
1444 =============
1445 SV_CheckWater
1446 =============
1447 */
1448 qboolean SV_CheckWater (prvm_edict_t *ent)
1449 {
1450         int cont;
1451         int nNativeContents;
1452         vec3_t point;
1453
1454         point[0] = ent->fields.server->origin[0];
1455         point[1] = ent->fields.server->origin[1];
1456         point[2] = ent->fields.server->origin[2] + ent->fields.server->mins[2] + 1;
1457
1458         // DRESK - Support for Entity Contents Transition Event
1459         // NOTE: Some logic needed to be slightly re-ordered
1460         // to not affect performance and allow for the feature.
1461
1462         // Acquire Super Contents Prior to Resets
1463         cont = SV_PointSuperContents(point);
1464         // Acquire Native Contents Here
1465         nNativeContents = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, cont);
1466
1467         // DRESK - Support for Entity Contents Transition Event
1468         if(ent->fields.server->watertype)
1469                 // Entity did NOT Spawn; Check
1470                 SV_CheckContentsTransition(ent, nNativeContents);
1471
1472
1473         ent->fields.server->waterlevel = 0;
1474         ent->fields.server->watertype = CONTENTS_EMPTY;
1475         cont = SV_PointSuperContents(point);
1476         if (cont & (SUPERCONTENTS_LIQUIDSMASK))
1477         {
1478                 ent->fields.server->watertype = nNativeContents;
1479                 ent->fields.server->waterlevel = 1;
1480                 point[2] = ent->fields.server->origin[2] + (ent->fields.server->mins[2] + ent->fields.server->maxs[2])*0.5;
1481                 if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1482                 {
1483                         ent->fields.server->waterlevel = 2;
1484                         point[2] = ent->fields.server->origin[2] + ent->fields.server->view_ofs[2];
1485                         if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1486                                 ent->fields.server->waterlevel = 3;
1487                 }
1488         }
1489
1490         return ent->fields.server->waterlevel > 1;
1491 }
1492
1493 /*
1494 ============
1495 SV_WallFriction
1496
1497 ============
1498 */
1499 void SV_WallFriction (prvm_edict_t *ent, float *stepnormal)
1500 {
1501         float d, i;
1502         vec3_t forward, into, side;
1503
1504         AngleVectors (ent->fields.server->v_angle, forward, NULL, NULL);
1505         if ((d = DotProduct (stepnormal, forward) + 0.5) < 0)
1506         {
1507                 // cut the tangential velocity
1508                 i = DotProduct (stepnormal, ent->fields.server->velocity);
1509                 VectorScale (stepnormal, i, into);
1510                 VectorSubtract (ent->fields.server->velocity, into, side);
1511                 ent->fields.server->velocity[0] = side[0] * (1 + d);
1512                 ent->fields.server->velocity[1] = side[1] * (1 + d);
1513         }
1514 }
1515
1516 #if 0
1517 /*
1518 =====================
1519 SV_TryUnstick
1520
1521 Player has come to a dead stop, possibly due to the problem with limited
1522 float precision at some angle joins in the BSP hull.
1523
1524 Try fixing by pushing one pixel in each direction.
1525
1526 This is a hack, but in the interest of good gameplay...
1527 ======================
1528 */
1529 int SV_TryUnstick (prvm_edict_t *ent, vec3_t oldvel)
1530 {
1531         int i, clip;
1532         vec3_t oldorg, dir;
1533
1534         VectorCopy (ent->fields.server->origin, oldorg);
1535         VectorClear (dir);
1536
1537         for (i=0 ; i<8 ; i++)
1538         {
1539                 // try pushing a little in an axial direction
1540                 switch (i)
1541                 {
1542                         case 0: dir[0] = 2; dir[1] = 0; break;
1543                         case 1: dir[0] = 0; dir[1] = 2; break;
1544                         case 2: dir[0] = -2; dir[1] = 0; break;
1545                         case 3: dir[0] = 0; dir[1] = -2; break;
1546                         case 4: dir[0] = 2; dir[1] = 2; break;
1547                         case 5: dir[0] = -2; dir[1] = 2; break;
1548                         case 6: dir[0] = 2; dir[1] = -2; break;
1549                         case 7: dir[0] = -2; dir[1] = -2; break;
1550                 }
1551
1552                 SV_PushEntity (ent, dir, false);
1553
1554                 // retry the original move
1555                 ent->fields.server->velocity[0] = oldvel[0];
1556                 ent->fields.server->velocity[1] = oldvel[1];
1557                 ent->fields.server->velocity[2] = 0;
1558                 clip = SV_FlyMove (ent, 0.1, NULL, SV_GenericHitSuperContentsMask(ent));
1559
1560                 if (fabs(oldorg[1] - ent->fields.server->origin[1]) > 4
1561                  || fabs(oldorg[0] - ent->fields.server->origin[0]) > 4)
1562                 {
1563                         Con_DPrint("TryUnstick - success.\n");
1564                         return clip;
1565                 }
1566
1567                 // go back to the original pos and try again
1568                 VectorCopy (oldorg, ent->fields.server->origin);
1569         }
1570
1571         // still not moving
1572         VectorClear (ent->fields.server->velocity);
1573         Con_DPrint("TryUnstick - failure.\n");
1574         return 7;
1575 }
1576 #endif
1577
1578 /*
1579 =====================
1580 SV_WalkMove
1581
1582 Only used by players
1583 ======================
1584 */
1585 void SV_WalkMove (prvm_edict_t *ent)
1586 {
1587         int clip, oldonground, originalmove_clip, originalmove_flags, originalmove_groundentity, hitsupercontentsmask;
1588         vec3_t upmove, downmove, start_origin, start_velocity, stepnormal, originalmove_origin, originalmove_velocity;
1589         trace_t downtrace;
1590
1591         // if frametime is 0 (due to client sending the same timestamp twice),
1592         // don't move
1593         if (sv.frametime <= 0)
1594                 return;
1595
1596         hitsupercontentsmask = SV_GenericHitSuperContentsMask(ent);
1597
1598         SV_CheckVelocity(ent);
1599
1600         // do a regular slide move unless it looks like you ran into a step
1601         oldonground = (int)ent->fields.server->flags & FL_ONGROUND;
1602
1603         VectorCopy (ent->fields.server->origin, start_origin);
1604         VectorCopy (ent->fields.server->velocity, start_velocity);
1605
1606         clip = SV_FlyMove (ent, sv.frametime, NULL, hitsupercontentsmask);
1607
1608         // if the move did not hit the ground at any point, we're not on ground
1609         if (!(clip & 1))
1610                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1611
1612         SV_CheckVelocity(ent);
1613
1614         VectorCopy(ent->fields.server->origin, originalmove_origin);
1615         VectorCopy(ent->fields.server->velocity, originalmove_velocity);
1616         originalmove_clip = clip;
1617         originalmove_flags = (int)ent->fields.server->flags;
1618         originalmove_groundentity = ent->fields.server->groundentity;
1619
1620         if ((int)ent->fields.server->flags & FL_WATERJUMP)
1621                 return;
1622
1623         if (sv_nostep.integer)
1624                 return;
1625
1626         // if move didn't block on a step, return
1627         if (clip & 2)
1628         {
1629                 // if move was not trying to move into the step, return
1630                 if (fabs(start_velocity[0]) < 0.03125 && fabs(start_velocity[1]) < 0.03125)
1631                         return;
1632
1633                 if (ent->fields.server->movetype != MOVETYPE_FLY)
1634                 {
1635                         // return if gibbed by a trigger
1636                         if (ent->fields.server->movetype != MOVETYPE_WALK)
1637                                 return;
1638
1639                         // only step up while jumping if that is enabled
1640                         if (!(sv_jumpstep.integer && sv_gameplayfix_stepwhilejumping.integer))
1641                                 if (!oldonground && ent->fields.server->waterlevel == 0)
1642                                         return;
1643                 }
1644
1645                 // try moving up and forward to go up a step
1646                 // back to start pos
1647                 VectorCopy (start_origin, ent->fields.server->origin);
1648                 VectorCopy (start_velocity, ent->fields.server->velocity);
1649
1650                 // move up
1651                 VectorClear (upmove);
1652                 upmove[2] = sv_stepheight.value;
1653                 // FIXME: don't link?
1654                 SV_PushEntity(ent, upmove, false);
1655
1656                 // move forward
1657                 ent->fields.server->velocity[2] = 0;
1658                 clip = SV_FlyMove (ent, sv.frametime, stepnormal, hitsupercontentsmask);
1659                 ent->fields.server->velocity[2] += start_velocity[2];
1660
1661                 SV_CheckVelocity(ent);
1662
1663                 // check for stuckness, possibly due to the limited precision of floats
1664                 // in the clipping hulls
1665                 if (clip
1666                  && fabs(originalmove_origin[1] - ent->fields.server->origin[1]) < 0.03125
1667                  && fabs(originalmove_origin[0] - ent->fields.server->origin[0]) < 0.03125)
1668                 {
1669                         //Con_Printf("wall\n");
1670                         // stepping up didn't make any progress, revert to original move
1671                         VectorCopy(originalmove_origin, ent->fields.server->origin);
1672                         VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1673                         //clip = originalmove_clip;
1674                         ent->fields.server->flags = originalmove_flags;
1675                         ent->fields.server->groundentity = originalmove_groundentity;
1676                         // now try to unstick if needed
1677                         //clip = SV_TryUnstick (ent, oldvel);
1678                         return;
1679                 }
1680
1681                 //Con_Printf("step - ");
1682
1683                 // extra friction based on view angle
1684                 if (clip & 2 && sv_wallfriction.integer)
1685                         SV_WallFriction (ent, stepnormal);
1686         }
1687         // don't do the down move if stepdown is disabled, moving upward, not in water, or the move started offground or ended onground
1688         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))
1689                 return;
1690
1691         // move down
1692         VectorClear (downmove);
1693         downmove[2] = -sv_stepheight.value + start_velocity[2]*sv.frametime;
1694         // FIXME: don't link?
1695         downtrace = SV_PushEntity (ent, downmove, false);
1696
1697         if (downtrace.fraction < 1 && downtrace.plane.normal[2] > 0.7)
1698         {
1699                 // this has been disabled so that you can't jump when you are stepping
1700                 // up while already jumping (also known as the Quake2 double jump bug)
1701 #if 0
1702                 // LordHavoc: disabled this check so you can walk on monsters/players
1703                 //if (ent->fields.server->solid == SOLID_BSP)
1704                 {
1705                         //Con_Printf("onground\n");
1706                         ent->fields.server->flags =     (int)ent->fields.server->flags | FL_ONGROUND;
1707                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(downtrace.ent);
1708                 }
1709 #endif
1710         }
1711         else
1712         {
1713                 //Con_Printf("slope\n");
1714                 // if the push down didn't end up on good ground, use the move without
1715                 // the step up.  This happens near wall / slope combinations, and can
1716                 // cause the player to hop up higher on a slope too steep to climb
1717                 VectorCopy(originalmove_origin, ent->fields.server->origin);
1718                 VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1719                 //clip = originalmove_clip;
1720                 ent->fields.server->flags = originalmove_flags;
1721                 ent->fields.server->groundentity = originalmove_groundentity;
1722         }
1723
1724         SV_CheckVelocity(ent);
1725 }
1726
1727 //============================================================================
1728
1729 /*
1730 =============
1731 SV_Physics_Follow
1732
1733 Entities that are "stuck" to another entity
1734 =============
1735 */
1736 void SV_Physics_Follow (prvm_edict_t *ent)
1737 {
1738         vec3_t vf, vr, vu, angles, v;
1739         prvm_edict_t *e;
1740
1741         // regular thinking
1742         if (!SV_RunThink (ent))
1743                 return;
1744
1745         // LordHavoc: implemented rotation on MOVETYPE_FOLLOW objects
1746         e = PRVM_PROG_TO_EDICT(ent->fields.server->aiment);
1747         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])
1748         {
1749                 // quick case for no rotation
1750                 VectorAdd(e->fields.server->origin, ent->fields.server->view_ofs, ent->fields.server->origin);
1751         }
1752         else
1753         {
1754                 angles[0] = -ent->fields.server->punchangle[0];
1755                 angles[1] =  ent->fields.server->punchangle[1];
1756                 angles[2] =  ent->fields.server->punchangle[2];
1757                 AngleVectors (angles, vf, vr, vu);
1758                 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];
1759                 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];
1760                 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];
1761                 angles[0] = -e->fields.server->angles[0];
1762                 angles[1] =  e->fields.server->angles[1];
1763                 angles[2] =  e->fields.server->angles[2];
1764                 AngleVectors (angles, vf, vr, vu);
1765                 ent->fields.server->origin[0] = v[0] * vf[0] + v[1] * vf[1] + v[2] * vf[2] + e->fields.server->origin[0];
1766                 ent->fields.server->origin[1] = v[0] * vr[0] + v[1] * vr[1] + v[2] * vr[2] + e->fields.server->origin[1];
1767                 ent->fields.server->origin[2] = v[0] * vu[0] + v[1] * vu[1] + v[2] * vu[2] + e->fields.server->origin[2];
1768         }
1769         VectorAdd (e->fields.server->angles, ent->fields.server->v_angle, ent->fields.server->angles);
1770         SV_LinkEdict (ent, true);
1771 }
1772
1773 /*
1774 ==============================================================================
1775
1776 TOSS / BOUNCE
1777
1778 ==============================================================================
1779 */
1780
1781 /*
1782 =============
1783 SV_CheckWaterTransition
1784
1785 =============
1786 */
1787 void SV_CheckWaterTransition (prvm_edict_t *ent)
1788 {
1789         int cont;
1790         cont = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, SV_PointSuperContents(ent->fields.server->origin));
1791         if (!ent->fields.server->watertype)
1792         {
1793                 // just spawned here
1794                 ent->fields.server->watertype = cont;
1795                 ent->fields.server->waterlevel = 1;
1796                 return;
1797         }
1798
1799         // DRESK - Support for Entity Contents Transition Event
1800         // NOTE: Call here BEFORE updating the watertype below,
1801         // and suppress watersplash sound if a valid function
1802         // call was made to allow for custom "splash" sounds.
1803         if( !SV_CheckContentsTransition(ent, cont) )
1804         { // Contents Transition Function Invalid; Potentially Play Water Sound
1805                 // check if the entity crossed into or out of water
1806                 if (sv_sound_watersplash.string && ((ent->fields.server->watertype == CONTENTS_WATER || ent->fields.server->watertype == CONTENTS_SLIME) != (cont == CONTENTS_WATER || cont == CONTENTS_SLIME)))
1807                         SV_StartSound (ent, 0, sv_sound_watersplash.string, 255, 1);
1808         }
1809
1810         if (cont <= CONTENTS_WATER)
1811         {
1812                 ent->fields.server->watertype = cont;
1813                 ent->fields.server->waterlevel = 1;
1814         }
1815         else
1816         {
1817                 ent->fields.server->watertype = CONTENTS_EMPTY;
1818                 ent->fields.server->waterlevel = 0;
1819         }
1820 }
1821
1822 /*
1823 =============
1824 SV_Physics_Toss
1825
1826 Toss, bounce, and fly movement.  When onground, do nothing.
1827 =============
1828 */
1829 void SV_Physics_Toss (prvm_edict_t *ent)
1830 {
1831         trace_t trace;
1832         vec3_t move;
1833
1834 // if onground, return without moving
1835         if ((int)ent->fields.server->flags & FL_ONGROUND)
1836         {
1837                 if (ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer)
1838                 {
1839                         // don't stick to ground if onground and moving upward
1840                         ent->fields.server->flags -= FL_ONGROUND;
1841                 }
1842                 else if (!ent->fields.server->groundentity || !sv_gameplayfix_noairborncorpse.integer)
1843                 {
1844                         // we can trust FL_ONGROUND if groundentity is world because it never moves
1845                         return;
1846                 }
1847                 else if (ent->priv.server->suspendedinairflag && PRVM_PROG_TO_EDICT(ent->fields.server->groundentity)->priv.server->free)
1848                 {
1849                         // if ent was supported by a brush model on previous frame,
1850                         // and groundentity is now freed, set groundentity to 0 (world)
1851                         // which leaves it suspended in the air
1852                         ent->fields.server->groundentity = 0;
1853                         return;
1854                 }
1855         }
1856         ent->priv.server->suspendedinairflag = false;
1857
1858         SV_CheckVelocity (ent);
1859
1860 // add gravity
1861         if (ent->fields.server->movetype == MOVETYPE_TOSS || ent->fields.server->movetype == MOVETYPE_BOUNCE)
1862                 SV_AddGravity (ent);
1863
1864 // move angles
1865         VectorMA (ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
1866
1867 // move origin
1868         VectorScale (ent->fields.server->velocity, sv.frametime, move);
1869         trace = SV_PushEntity (ent, move, true);
1870         if (ent->priv.server->free)
1871                 return;
1872         if (trace.bmodelstartsolid)
1873         {
1874                 // try to unstick the entity
1875                 SV_UnstickEntity(ent);
1876                 trace = SV_PushEntity (ent, move, false);
1877                 if (ent->priv.server->free)
1878                         return;
1879         }
1880
1881         if (trace.fraction < 1)
1882         {
1883                 if (ent->fields.server->movetype == MOVETYPE_BOUNCEMISSILE)
1884                 {
1885                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 2.0);
1886                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1887                 }
1888                 else if (ent->fields.server->movetype == MOVETYPE_BOUNCE)
1889                 {
1890                         float d;
1891                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.5);
1892                         // LordHavoc: fixed grenades not bouncing when fired down a slope
1893                         if (sv_gameplayfix_grenadebouncedownslopes.integer)
1894                         {
1895                                 d = DotProduct(trace.plane.normal, ent->fields.server->velocity);
1896                                 if (trace.plane.normal[2] > 0.7 && fabs(d) < 60)
1897                                 {
1898                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1899                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1900                                         VectorClear (ent->fields.server->velocity);
1901                                         VectorClear (ent->fields.server->avelocity);
1902                                 }
1903                                 else
1904                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1905                         }
1906                         else
1907                         {
1908                                 if (trace.plane.normal[2] > 0.7 && ent->fields.server->velocity[2] < 60)
1909                                 {
1910                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1911                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1912                                         VectorClear (ent->fields.server->velocity);
1913                                         VectorClear (ent->fields.server->avelocity);
1914                                 }
1915                                 else
1916                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1917                         }
1918                 }
1919                 else
1920                 {
1921                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.0);
1922                         if (trace.plane.normal[2] > 0.7)
1923                         {
1924                                 ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1925                                 ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1926                                 if (((prvm_edict_t *)trace.ent)->fields.server->solid == SOLID_BSP)
1927                                         ent->priv.server->suspendedinairflag = true;
1928                                 VectorClear (ent->fields.server->velocity);
1929                                 VectorClear (ent->fields.server->avelocity);
1930                         }
1931                         else
1932                                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1933                 }
1934         }
1935
1936 // check for in water
1937         SV_CheckWaterTransition (ent);
1938 }
1939
1940 /*
1941 ===============================================================================
1942
1943 STEPPING MOVEMENT
1944
1945 ===============================================================================
1946 */
1947
1948 /*
1949 =============
1950 SV_Physics_Step
1951
1952 Monsters freefall when they don't have a ground entity, otherwise
1953 all movement is done with discrete steps.
1954
1955 This is also used for objects that have become still on the ground, but
1956 will fall if the floor is pulled out from under them.
1957 =============
1958 */
1959 void SV_Physics_Step (prvm_edict_t *ent)
1960 {
1961         int flags = (int)ent->fields.server->flags;
1962         // don't fall at all if fly/swim
1963         if (!(flags & (FL_FLY | FL_SWIM)))
1964         {
1965                 if (flags & FL_ONGROUND)
1966                 {
1967                         // freefall if onground and moving upward
1968                         // freefall if not standing on a world surface (it may be a lift or trap door)
1969                         if ((ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer) || ent->fields.server->groundentity)
1970                         {
1971                                 ent->fields.server->flags -= FL_ONGROUND;
1972                                 SV_AddGravity(ent);
1973                                 SV_CheckVelocity(ent);
1974                                 SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
1975                                 SV_LinkEdict(ent, true);
1976                         }
1977                 }
1978                 else
1979                 {
1980                         // freefall if not onground
1981                         int hitsound = ent->fields.server->velocity[2] < sv_gravity.value * -0.1;
1982
1983                         SV_AddGravity(ent);
1984                         SV_CheckVelocity(ent);
1985                         SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
1986                         SV_LinkEdict(ent, true);
1987
1988                         // just hit ground
1989                         if (hitsound && (int)ent->fields.server->flags & FL_ONGROUND && sv_sound_land.string)
1990                                 SV_StartSound(ent, 0, sv_sound_land.string, 255, 1);
1991                 }
1992         }
1993
1994 // regular thinking
1995         SV_RunThink(ent);
1996
1997         SV_CheckWaterTransition(ent);
1998 }
1999
2000 //============================================================================
2001
2002 static void SV_Physics_Entity (prvm_edict_t *ent)
2003 {
2004         // don't run a move on newly spawned projectiles as it messes up movement
2005         // interpolation and rocket trails
2006         qboolean runmove = ent->priv.server->move;
2007         ent->priv.server->move = true;
2008         switch ((int) ent->fields.server->movetype)
2009         {
2010         case MOVETYPE_PUSH:
2011         case MOVETYPE_FAKEPUSH:
2012                 SV_Physics_Pusher (ent);
2013                 break;
2014         case MOVETYPE_NONE:
2015                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2016                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2017                         SV_RunThink (ent);
2018                 break;
2019         case MOVETYPE_FOLLOW:
2020                 SV_Physics_Follow (ent);
2021                 break;
2022         case MOVETYPE_NOCLIP:
2023                 if (SV_RunThink(ent))
2024                 {
2025                         SV_CheckWater(ent);
2026                         VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2027                         VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2028                 }
2029                 SV_LinkEdict(ent, false);
2030                 break;
2031         case MOVETYPE_STEP:
2032                 SV_Physics_Step (ent);
2033                 break;
2034         case MOVETYPE_WALK:
2035                 if (SV_RunThink (ent))
2036                 {
2037                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2038                                 SV_AddGravity (ent);
2039                         SV_CheckStuck (ent);
2040                         SV_WalkMove (ent);
2041                         SV_LinkEdict (ent, true);
2042                 }
2043                 break;
2044         case MOVETYPE_TOSS:
2045         case MOVETYPE_BOUNCE:
2046         case MOVETYPE_BOUNCEMISSILE:
2047         case MOVETYPE_FLYMISSILE:
2048         case MOVETYPE_FLY:
2049                 // regular thinking
2050                 if (SV_RunThink (ent) && (runmove || !sv_gameplayfix_delayprojectiles.integer))
2051                         SV_Physics_Toss (ent);
2052                 break;
2053         default:
2054                 Con_Printf ("SV_Physics: bad movetype %i\n", (int)ent->fields.server->movetype);
2055                 break;
2056         }
2057 }
2058
2059 void SV_Physics_ClientMove(void)
2060 {
2061         prvm_edict_t *ent;
2062         ent = host_client->edict;
2063
2064         // call player physics, this needs the proper frametime
2065         prog->globals.server->frametime = sv.frametime;
2066         SV_ClientThink();
2067
2068         // call standard client pre-think, with frametime = 0
2069         prog->globals.server->time = sv.time;
2070         prog->globals.server->frametime = 0;
2071         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2072         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2073         prog->globals.server->frametime = sv.frametime;
2074
2075         // make sure the velocity is sane (not a NaN)
2076         SV_CheckVelocity(ent);
2077         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2078         // player_run/player_stand1 does not horribly malfunction if the
2079         // velocity becomes a number that is both == 0 and != 0
2080         // (sounds to me like NaN but to be absolutely safe...)
2081         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2082                 VectorClear(ent->fields.server->velocity);
2083
2084         // perform MOVETYPE_WALK behavior
2085         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2086                 SV_AddGravity (ent);
2087         SV_CheckStuck (ent);
2088         SV_WalkMove (ent);
2089
2090         SV_CheckVelocity (ent);
2091
2092         SV_LinkEdict (ent, true);
2093
2094         SV_CheckVelocity (ent);
2095
2096         // call standard player post-think, with frametime = 0
2097         prog->globals.server->time = sv.time;
2098         prog->globals.server->frametime = 0;
2099         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2100         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2101         prog->globals.server->frametime = sv.frametime;
2102
2103         if(ent->fields.server->fixangle)
2104         {
2105                 // angle fixing was requested by physics code...
2106                 // so store the current angles for later use
2107                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2108                 host_client->fixangle_angles_set = TRUE;
2109
2110                 // and clear fixangle for the next frame
2111                 ent->fields.server->fixangle = 0;
2112         }
2113 }
2114
2115 void SV_Physics_ClientEntity(prvm_edict_t *ent)
2116 {
2117         // don't do physics on disconnected clients, FrikBot relies on this
2118         if (!host_client->spawned)
2119         {
2120                 memset(&host_client->cmd, 0, sizeof(host_client->cmd));
2121                 return;
2122         }
2123
2124         // don't run physics here if running asynchronously
2125         if (host_client->clmovement_skipphysicsframes <= 0)
2126                 SV_ClientThink();
2127
2128         // make sure the velocity is sane (not a NaN)
2129         SV_CheckVelocity(ent);
2130         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2131         // player_run/player_stand1 does not horribly malfunction if the
2132         // velocity becomes a number that is both == 0 and != 0
2133         // (sounds to me like NaN but to be absolutely safe...)
2134         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2135                 VectorClear(ent->fields.server->velocity);
2136
2137         // call standard client pre-think
2138         prog->globals.server->time = sv.time;
2139         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2140         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2141         SV_CheckVelocity (ent);
2142
2143         switch ((int) ent->fields.server->movetype)
2144         {
2145         case MOVETYPE_PUSH:
2146         case MOVETYPE_FAKEPUSH:
2147                 SV_Physics_Pusher (ent);
2148                 break;
2149         case MOVETYPE_NONE:
2150                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2151                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2152                         SV_RunThink (ent);
2153                 break;
2154         case MOVETYPE_FOLLOW:
2155                 SV_Physics_Follow (ent);
2156                 break;
2157         case MOVETYPE_NOCLIP:
2158                 SV_RunThink(ent);
2159                 SV_CheckWater(ent);
2160                 VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2161                 VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2162                 break;
2163         case MOVETYPE_STEP:
2164                 SV_Physics_Step (ent);
2165                 break;
2166         case MOVETYPE_WALK:
2167                 SV_RunThink (ent);
2168                 // don't run physics here if running asynchronously
2169                 if (host_client->clmovement_skipphysicsframes <= 0)
2170                 {
2171                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2172                                 SV_AddGravity (ent);
2173                         SV_CheckStuck (ent);
2174                         SV_WalkMove (ent);
2175                         host_client->cmd.time = max(host_client->cmd.time, sv.time); // ignore client movement data for anything before NOW
2176                 }
2177                 break;
2178         case MOVETYPE_TOSS:
2179         case MOVETYPE_BOUNCE:
2180         case MOVETYPE_BOUNCEMISSILE:
2181         case MOVETYPE_FLYMISSILE:
2182                 // regular thinking
2183                 SV_RunThink (ent);
2184                 SV_Physics_Toss (ent);
2185                 break;
2186         case MOVETYPE_FLY:
2187                 SV_RunThink (ent);
2188                 SV_CheckWater (ent);
2189                 SV_WalkMove (ent);
2190                 break;
2191         default:
2192                 Con_Printf ("SV_Physics_ClientEntity: bad movetype %i\n", (int)ent->fields.server->movetype);
2193                 break;
2194         }
2195
2196         // decrement the countdown variable used to decide when to go back to
2197         // synchronous physics
2198         if (host_client->clmovement_skipphysicsframes > 0)
2199                 host_client->clmovement_skipphysicsframes--;
2200
2201         SV_CheckVelocity (ent);
2202
2203         SV_LinkEdict (ent, true);
2204
2205         SV_CheckVelocity (ent);
2206
2207         // call standard player post-think
2208         prog->globals.server->time = sv.time;
2209         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2210         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2211
2212         if(ent->fields.server->fixangle)
2213         {
2214                 // angle fixing was requested by physics code...
2215                 // so store the current angles for later use
2216                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2217                 host_client->fixangle_angles_set = TRUE;
2218
2219                 // and clear fixangle for the next frame
2220                 ent->fields.server->fixangle = 0;
2221         }
2222 }
2223
2224 /*
2225 ================
2226 SV_Physics
2227
2228 ================
2229 */
2230 void SV_Physics (void)
2231 {
2232         int i;
2233         prvm_edict_t *ent;
2234
2235 // let the progs know that a new frame has started
2236         prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2237         prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2238         prog->globals.server->time = sv.time;
2239         prog->globals.server->frametime = sv.frametime;
2240         PRVM_ExecuteProgram (prog->globals.server->StartFrame, "QC function StartFrame is missing");
2241
2242 //
2243 // treat each object in turn
2244 //
2245
2246         // if force_retouch, relink all the entities
2247         if (prog->globals.server->force_retouch > 0)
2248                 for (i = 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2249                         if (!ent->priv.server->free)
2250                                 SV_LinkEdict (ent, true);       // force retouch even for stationary
2251
2252         // run physics on the client entities
2253         for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
2254                 if (!ent->priv.server->free)
2255                                 SV_Physics_ClientEntity(ent);
2256
2257         // run physics on all the non-client entities
2258         if (!sv_freezenonclients.integer)
2259                 for (;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2260                         if (!ent->priv.server->free)
2261                                 SV_Physics_Entity(ent);
2262
2263         if (prog->globals.server->force_retouch > 0)
2264                 prog->globals.server->force_retouch = max(0, prog->globals.server->force_retouch - 1);
2265
2266         // LordHavoc: endframe support
2267         if (prog->funcoffsets.EndFrame)
2268         {
2269                 prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2270                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2271                 prog->globals.server->time = sv.time;
2272                 PRVM_ExecuteProgram (prog->funcoffsets.EndFrame, "QC function EndFrame is missing");
2273         }
2274
2275         // decrement prog->num_edicts if the highest number entities died
2276         for (;PRVM_EDICT_NUM(prog->num_edicts - 1)->priv.server->free;prog->num_edicts--);
2277
2278         if (!sv_freezenonclients.integer)
2279                 sv.time += sv.frametime;
2280 }