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 #include "prvm_cmds.h"
  24
  25 /*
  26
  27
  28 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.
  29
  30 onground is set for toss objects when they come to a complete rest.  it is set for steping or walking objects
  31
  32 doors, plats, etc are SOLID_BSP, and MOVETYPE_PUSH
  33 bonus items are SOLID_TRIGGER touch, and MOVETYPE_TOSS
  34 corpses are SOLID_NOT and MOVETYPE_TOSS
  35 crates are SOLID_BBOX and MOVETYPE_TOSS
  36 walking monsters are SOLID_SLIDEBOX and MOVETYPE_STEP
  37 flying/floating monsters are SOLID_SLIDEBOX and MOVETYPE_FLY
  38
  39 solid_edge items only clip against bsp models.
  40
  41 */
  42
  43 #define MOVE_EPSILON    0.01
  44
  45 void SV_Physics_Toss (prvm_edict_t *ent);
  46
  47 int SV_GetPitchSign(prvm_prog_t *prog, prvm_edict_t *ent)
  48 {
  49         model_t *model;
  50         if (
  51                         (model = SV_GetModelFromEdict(ent))
  52                         ?
  53                         model->type == mod_alias
  54                         :
  55                         (
  56                          (((unsigned char)PRVM_serveredictfloat(ent, pflags)) & PFLAGS_FULLDYNAMIC)
  57                          ||
  58                          ((gamemode == GAME_TENEBRAE) && ((unsigned int)PRVM_serveredictfloat(ent, effects) & (16 | 32)))
  59                         )
  60            )
  61                 return -1;
  62         return 1;
  63 }
  64
  65 /*
  66 ===============================================================================
  67
  68 LINE TESTING IN HULLS
  69
  70 ===============================================================================
  71 */
  72
  73 int SV_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
  74 {
  75         prvm_prog_t *prog = SVVM_prog;
  76         if (passedict)
  77         {
  78                 int dphitcontentsmask = (int)PRVM_serveredictfloat(passedict, dphitcontentsmask);
  79                 if (dphitcontentsmask)
  80                         return dphitcontentsmask;
  81                 else if (PRVM_serveredictfloat(passedict, solid) == SOLID_SLIDEBOX)
  82                 {
  83                         if ((int)PRVM_serveredictfloat(passedict, flags) & FL_MONSTER)
  84                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
  85                         else
  86                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
  87                 }
  88                 else if (PRVM_serveredictfloat(passedict, solid) == SOLID_CORPSE)
  89                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
  90                 else if (PRVM_serveredictfloat(passedict, solid) == SOLID_TRIGGER)
  91                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
  92                 else
  93                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
  94         }
  95         else
  96                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
  97 }
  98
  99 /*
 100 ==================
 101 SV_TracePoint
 102 ==================
 103 */
 104 trace_t SV_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 105 {
 106         prvm_prog_t *prog = SVVM_prog;
 107         int i, bodysupercontents;
 108         int passedictprog;
 109         float pitchsign = 1;
 110         prvm_edict_t *traceowner, *touch;
 111         trace_t trace;
 112         // temporary storage because prvm_vec_t may differ from vec_t
 113         vec3_t touchmins, touchmaxs;
 114         // bounding box of entire move area
 115         vec3_t clipboxmins, clipboxmaxs;
 116         // size when clipping against monsters
 117         vec3_t clipmins2, clipmaxs2;
 118         // start and end origin of move
 119         vec3_t clipstart;
 120         // trace results
 121         trace_t cliptrace;
 122         // matrices to transform into/out of other entity's space
 123         matrix4x4_t matrix, imatrix;
 124         // model of other entity
 125         model_t *model;
 126         // list of entities to test for collisions
 127         int numtouchedicts;
 128         static prvm_edict_t *touchedicts[MAX_EDICTS];
 129         int clipgroup;
 130
 131         //return SV_TraceBox(start, vec3_origin, vec3_origin, end, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 132
 133         VectorCopy(start, clipstart);
 134         VectorClear(clipmins2);
 135         VectorClear(clipmaxs2);
 136 #if COLLISIONPARANOID >= 3
 137         Con_Printf("move(%f %f %f)", clipstart[0], clipstart[1], clipstart[2]);
 138 #endif
 139
 140         // clip to world
 141         Collision_ClipPointToWorld(&cliptrace, sv.worldmodel, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 142         cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
 143         if (cliptrace.startsolid || cliptrace.fraction < 1)
 144                 cliptrace.ent = prog->edicts;
 145         if (type == MOVE_WORLDONLY)
 146                 goto finished;
 147
 148         if (type == MOVE_MISSILE)
 149         {
 150                 // LadyHavoc: modified this, was = -15, now -= 15
 151                 for (i = 0;i < 3;i++)
 152                 {
 153                         clipmins2[i] -= 15;
 154                         clipmaxs2[i] += 15;
 155                 }
 156         }
 157
 158         // create the bounding box of the entire move
 159         for (i = 0;i < 3;i++)
 160         {
 161                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + clipmins2[i] - 1;
 162                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + clipmaxs2[i] + 1;
 163         }
 164
 165         // debug override to test against everything
 166         if (sv_debugmove.integer)
 167         {
 168                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
 169                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
 170         }
 171
 172         // if the passedict is world, make it NULL (to avoid two checks each time)
 173         if (passedict == prog->edicts)
 174                 passedict = NULL;
 175         // precalculate prog value for passedict for comparisons
 176         passedictprog = PRVM_EDICT_TO_PROG(passedict);
 177         // precalculate passedict's owner edict pointer for comparisons
 178         traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 179
 180         clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
 181
 182         // clip to entities
 183         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 184         // the clip region, so we can skip culling checks in the loop below
 185         numtouchedicts = SV_EntitiesInBox(clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 186         if (numtouchedicts > MAX_EDICTS)
 187         {
 188                 // this never happens
 189                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 190                 numtouchedicts = MAX_EDICTS;
 191         }
 192         for (i = 0;i < numtouchedicts;i++)
 193         {
 194                 touch = touchedicts[i];
 195
 196                 if (PRVM_serveredictfloat(touch, solid) < SOLID_BBOX)
 197                         continue;
 198                 if (type == MOVE_NOMONSTERS && PRVM_serveredictfloat(touch, solid) != SOLID_BSP)
 199                         continue;
 200
 201                 if (passedict)
 202                 {
 203                         // don't clip against self
 204                         if (passedict == touch)
 205                                 continue;
 206                         // don't clip owned entities against owner
 207                         if (traceowner == touch)
 208                                 continue;
 209                         // don't clip owner against owned entities
 210                         if (passedictprog == PRVM_serveredictedict(touch, owner))
 211                                 continue;
 212                         // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
 213                         if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
 214                                 continue;
 215                         // don't clip points against points (they can't collide)
 216                         if (VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
 217                                 continue;
 218                 }
 219
 220                 bodysupercontents = PRVM_serveredictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 221
 222                 // might interact, so do an exact clip
 223                 model = NULL;
 224                 if ((int) PRVM_serveredictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
 225                 {
 226                         model = SV_GetModelFromEdict(touch);
 227                         pitchsign = SV_GetPitchSign(prog, touch);
 228                 }
 229                 if (model)
 230                         Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2], pitchsign * PRVM_serveredictvector(touch, angles)[0], PRVM_serveredictvector(touch, angles)[1], PRVM_serveredictvector(touch, angles)[2], 1);
 231                 else
 232                         Matrix4x4_CreateTranslate(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2]);
 233                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 234                 VM_GenerateFrameGroupBlend(prog, touch->priv.server->framegroupblend, touch);
 235                 VM_FrameBlendFromFrameGroupBlend(touch->priv.server->frameblend, touch->priv.server->framegroupblend, model, sv.time);
 236                 VM_UpdateEdictSkeleton(prog, touch, model, touch->priv.server->frameblend);
 237                 VectorCopy(PRVM_serveredictvector(touch, mins), touchmins);
 238                 VectorCopy(PRVM_serveredictvector(touch, maxs), touchmaxs);
 239                 if (type == MOVE_MISSILE && (int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)
 240                         Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, 0.0f);
 241                 else
 242                         Collision_ClipPointToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 243
 244                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_serveredictfloat(touch, solid) == SOLID_BSP);
 245         }
 246
 247 finished:
 248         return cliptrace;
 249 }
 250
 251 /*
 252 ==================
 253 SV_TraceLine
 254 ==================
 255 */
 256 trace_t SV_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 257 {
 258         prvm_prog_t *prog = SVVM_prog;
 259         int i, bodysupercontents;
 260         int passedictprog;
 261         float pitchsign = 1;
 262         prvm_edict_t *traceowner, *touch;
 263         trace_t trace;
 264         // temporary storage because prvm_vec_t may differ from vec_t
 265         vec3_t touchmins, touchmaxs;
 266         // bounding box of entire move area
 267         vec3_t clipboxmins, clipboxmaxs;
 268         // size when clipping against monsters
 269         vec3_t clipmins2, clipmaxs2;
 270         // start and end origin of move
 271         vec3_t clipstart, clipend;
 272         // trace results
 273         trace_t cliptrace;
 274         // matrices to transform into/out of other entity's space
 275         matrix4x4_t matrix, imatrix;
 276         // model of other entity
 277         model_t *model;
 278         // list of entities to test for collisions
 279         int numtouchedicts;
 280         static prvm_edict_t *touchedicts[MAX_EDICTS];
 281         int clipgroup;
 282         if (VectorCompare(start, end))
 283                 return SV_TracePoint(start, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 284
 285         //return SV_TraceBox(start, vec3_origin, vec3_origin, end, type, passedict, hitsupercontentsmask);
 286
 287         VectorCopy(start, clipstart);
 288         VectorCopy(end, clipend);
 289         VectorClear(clipmins2);
 290         VectorClear(clipmaxs2);
 291 #if COLLISIONPARANOID >= 3
 292         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
 293 #endif
 294
 295         // clip to world
 296         Collision_ClipLineToWorld(&cliptrace, sv.worldmodel, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, false);
 297         cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
 298         if (cliptrace.startsolid || cliptrace.fraction < 1)
 299                 cliptrace.ent = prog->edicts;
 300         if (type == MOVE_WORLDONLY)
 301                 goto finished;
 302
 303         if (type == MOVE_MISSILE)
 304         {
 305                 // LadyHavoc: modified this, was = -15, now -= 15
 306                 for (i = 0;i < 3;i++)
 307                 {
 308                         clipmins2[i] -= 15;
 309                         clipmaxs2[i] += 15;
 310                 }
 311         }
 312
 313         // create the bounding box of the entire move
 314         for (i = 0;i < 3;i++)
 315         {
 316                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + clipmins2[i] - 1;
 317                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + clipmaxs2[i] + 1;
 318         }
 319
 320         // debug override to test against everything
 321         if (sv_debugmove.integer)
 322         {
 323                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
 324                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
 325         }
 326
 327         // if the passedict is world, make it NULL (to avoid two checks each time)
 328         if (passedict == prog->edicts)
 329                 passedict = NULL;
 330         // precalculate prog value for passedict for comparisons
 331         passedictprog = PRVM_EDICT_TO_PROG(passedict);
 332         // precalculate passedict's owner edict pointer for comparisons
 333         traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 334
 335         clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
 336
 337         // clip to entities
 338         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 339         // the clip region, so we can skip culling checks in the loop below
 340         numtouchedicts = SV_EntitiesInBox(clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 341         if (numtouchedicts > MAX_EDICTS)
 342         {
 343                 // this never happens
 344                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 345                 numtouchedicts = MAX_EDICTS;
 346         }
 347         for (i = 0;i < numtouchedicts;i++)
 348         {
 349                 touch = touchedicts[i];
 350
 351                 if (PRVM_serveredictfloat(touch, solid) < SOLID_BBOX)
 352                         continue;
 353                 if (type == MOVE_NOMONSTERS && PRVM_serveredictfloat(touch, solid) != SOLID_BSP)
 354                         continue;
 355
 356                 if (passedict)
 357                 {
 358                         // don't clip against self
 359                         if (passedict == touch)
 360                                 continue;
 361                         // don't clip owned entities against owner
 362                         if (traceowner == touch)
 363                                 continue;
 364                         // don't clip owner against owned entities
 365                         if (passedictprog == PRVM_serveredictedict(touch, owner))
 366                                 continue;
 367                         // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
 368                         if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
 369                                 continue;
 370                         // don't clip points against points (they can't collide)
 371                         if (VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
 372                                 continue;
 373                 }
 374
 375                 bodysupercontents = PRVM_serveredictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 376
 377                 // might interact, so do an exact clip
 378                 model = NULL;
 379                 if ((int) PRVM_serveredictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
 380                 {
 381                         model = SV_GetModelFromEdict(touch);
 382                         pitchsign = SV_GetPitchSign(prog, touch);
 383                 }
 384                 if (model)
 385                         Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2], pitchsign * PRVM_serveredictvector(touch, angles)[0], PRVM_serveredictvector(touch, angles)[1], PRVM_serveredictvector(touch, angles)[2], 1);
 386                 else
 387                         Matrix4x4_CreateTranslate(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2]);
 388                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 389                 VM_GenerateFrameGroupBlend(prog, touch->priv.server->framegroupblend, touch);
 390                 VM_FrameBlendFromFrameGroupBlend(touch->priv.server->frameblend, touch->priv.server->framegroupblend, model, sv.time);
 391                 VM_UpdateEdictSkeleton(prog, touch, model, touch->priv.server->frameblend);
 392                 VectorCopy(PRVM_serveredictvector(touch, mins), touchmins);
 393                 VectorCopy(PRVM_serveredictvector(touch, maxs), touchmaxs);
 394                 if (type == MOVE_MISSILE && (int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)
 395                         Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 396                 else
 397                         Collision_ClipLineToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, false);
 398
 399                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_serveredictfloat(touch, solid) == SOLID_BSP);
 400         }
 401
 402 finished:
 403         return cliptrace;
 404 }
 405
 406 /*
 407 ==================
 408 SV_Move
 409 ==================
 410 */
 411 #if COLLISIONPARANOID >= 1
 412 static trace_t SV_TraceBox_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 413 #else
 414 trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 415 #endif
 416 {
 417         prvm_prog_t *prog = SVVM_prog;
 418         vec3_t hullmins, hullmaxs;
 419         int i, bodysupercontents;
 420         int passedictprog;
 421         float pitchsign = 1;
 422         qbool pointtrace;
 423         prvm_edict_t *traceowner, *touch;
 424         trace_t trace;
 425         // temporary storage because prvm_vec_t may differ from vec_t
 426         vec3_t touchmins, touchmaxs;
 427         // bounding box of entire move area
 428         vec3_t clipboxmins, clipboxmaxs;
 429         // size of the moving object
 430         vec3_t clipmins, clipmaxs;
 431         // size when clipping against monsters
 432         vec3_t clipmins2, clipmaxs2;
 433         // start and end origin of move
 434         vec3_t clipstart, clipend;
 435         // trace results
 436         trace_t cliptrace;
 437         // matrices to transform into/out of other entity's space
 438         matrix4x4_t matrix, imatrix;
 439         // model of other entity
 440         model_t *model;
 441         // list of entities to test for collisions
 442         int numtouchedicts;
 443         static prvm_edict_t *touchedicts[MAX_EDICTS];
 444         int clipgroup;
 445         if (VectorCompare(mins, maxs))
 446         {
 447                 vec3_t shiftstart, shiftend;
 448                 VectorAdd(start, mins, shiftstart);
 449                 VectorAdd(end, mins, shiftend);
 450                 if (VectorCompare(start, end))
 451                         trace = SV_TracePoint(shiftstart, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 452                 else
 453                         trace = SV_TraceLine(shiftstart, shiftend, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 454                 VectorSubtract(trace.endpos, mins, trace.endpos);
 455                 return trace;
 456         }
 457
 458         VectorCopy(start, clipstart);
 459         VectorCopy(end, clipend);
 460         VectorCopy(mins, clipmins);
 461         VectorCopy(maxs, clipmaxs);
 462         VectorCopy(mins, clipmins2);
 463         VectorCopy(maxs, clipmaxs2);
 464 #if COLLISIONPARANOID >= 3
 465         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
 466 #endif
 467
 468         // clip to world
 469         Collision_ClipToWorld(&cliptrace, sv.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 470         cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
 471         if (cliptrace.startsolid || cliptrace.fraction < 1)
 472                 cliptrace.ent = prog->edicts;
 473         if (type == MOVE_WORLDONLY)
 474                 goto finished;
 475
 476         if (type == MOVE_MISSILE)
 477         {
 478                 // LadyHavoc: modified this, was = -15, now -= 15
 479                 for (i = 0;i < 3;i++)
 480                 {
 481                         clipmins2[i] -= 15;
 482                         clipmaxs2[i] += 15;
 483                 }
 484         }
 485
 486         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
 487         if (sv.worldmodel && sv.worldmodel->brush.RoundUpToHullSize)
 488                 sv.worldmodel->brush.RoundUpToHullSize(sv.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
 489         else
 490         {
 491                 VectorCopy(clipmins, hullmins);
 492                 VectorCopy(clipmaxs, hullmaxs);
 493         }
 494
 495         // create the bounding box of the entire move
 496         for (i = 0;i < 3;i++)
 497         {
 498                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
 499                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
 500         }
 501
 502         // debug override to test against everything
 503         if (sv_debugmove.integer)
 504         {
 505                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = (vec_t)-999999999;
 506                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  (vec_t)999999999;
 507         }
 508
 509         // if the passedict is world, make it NULL (to avoid two checks each time)
 510         if (passedict == prog->edicts)
 511                 passedict = NULL;
 512         // precalculate prog value for passedict for comparisons
 513         passedictprog = PRVM_EDICT_TO_PROG(passedict);
 514         // figure out whether this is a point trace for comparisons
 515         pointtrace = VectorCompare(clipmins, clipmaxs);
 516         // precalculate passedict's owner edict pointer for comparisons
 517         traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_serveredictedict(passedict, owner)) : 0;
 518
 519         clipgroup = passedict ? (int)PRVM_serveredictfloat(passedict, clipgroup) : 0;
 520
 521         // clip to entities
 522         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 523         // the clip region, so we can skip culling checks in the loop below
 524         numtouchedicts = SV_EntitiesInBox(clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 525         if (numtouchedicts > MAX_EDICTS)
 526         {
 527                 // this never happens
 528                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 529                 numtouchedicts = MAX_EDICTS;
 530         }
 531         for (i = 0;i < numtouchedicts;i++)
 532         {
 533                 touch = touchedicts[i];
 534
 535                 if (PRVM_serveredictfloat(touch, solid) < SOLID_BBOX)
 536                         continue;
 537                 if (type == MOVE_NOMONSTERS && PRVM_serveredictfloat(touch, solid) != SOLID_BSP)
 538                         continue;
 539
 540                 if (passedict)
 541                 {
 542                         // don't clip against self
 543                         if (passedict == touch)
 544                                 continue;
 545                         // don't clip owned entities against owner
 546                         if (traceowner == touch)
 547                                 continue;
 548                         // don't clip owner against owned entities
 549                         if (passedictprog == PRVM_serveredictedict(touch, owner))
 550                                 continue;
 551                         // don't clip against any entities in the same clipgroup (DP_RM_CLIPGROUP)
 552                         if (clipgroup && clipgroup == (int)PRVM_serveredictfloat(touch, clipgroup))
 553                                 continue;
 554                         // don't clip points against points (they can't collide)
 555                         if (pointtrace && VectorCompare(PRVM_serveredictvector(touch, mins), PRVM_serveredictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)))
 556                                 continue;
 557                 }
 558
 559                 bodysupercontents = PRVM_serveredictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 560
 561                 // might interact, so do an exact clip
 562                 model = NULL;
 563                 if ((int) PRVM_serveredictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
 564                 {
 565                         model = SV_GetModelFromEdict(touch);
 566                         pitchsign = SV_GetPitchSign(prog, touch);
 567                 }
 568                 if (model)
 569                         Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2], pitchsign * PRVM_serveredictvector(touch, angles)[0], PRVM_serveredictvector(touch, angles)[1], PRVM_serveredictvector(touch, angles)[2], 1);
 570                 else
 571                         Matrix4x4_CreateTranslate(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2]);
 572                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 573                 VM_GenerateFrameGroupBlend(prog, touch->priv.server->framegroupblend, touch);
 574                 VM_FrameBlendFromFrameGroupBlend(touch->priv.server->frameblend, touch->priv.server->framegroupblend, model, sv.time);
 575                 VM_UpdateEdictSkeleton(prog, touch, model, touch->priv.server->frameblend);
 576                 VectorCopy(PRVM_serveredictvector(touch, mins), touchmins);
 577                 VectorCopy(PRVM_serveredictvector(touch, maxs), touchmaxs);
 578                 if (type == MOVE_MISSILE && (int)PRVM_serveredictfloat(touch, flags) & FL_MONSTER)
 579                         Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 580                 else
 581                         Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 582
 583                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_serveredictfloat(touch, solid) == SOLID_BSP);
 584         }
 585
 586 finished:
 587         return cliptrace;
 588 }
 589
 590 #if COLLISIONPARANOID >= 1
 591 trace_t SV_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend)
 592 {
 593         prvm_prog_t *prog = SVVM_prog;
 594         int endstuck;
 595         trace_t trace;
 596         vec3_t temp;
 597         trace = SV_TraceBox_(start, mins, maxs, end, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 598         if (passedict)
 599         {
 600                 VectorCopy(trace.endpos, temp);
 601                 endstuck = SV_TraceBox_(temp, mins, maxs, temp, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend).startsolid;
 602 #if COLLISIONPARANOID < 3
 603                 if (trace.startsolid || endstuck)
 604 #endif
 605                         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, PRVM_serveredictvector(passedict, origin)[0], PRVM_serveredictvector(passedict, origin)[1], PRVM_serveredictvector(passedict, origin)[2], end[0] - PRVM_serveredictvector(passedict, origin)[0], end[1] - PRVM_serveredictvector(passedict, origin)[1], end[2] - PRVM_serveredictvector(passedict, origin)[2], trace.fraction, trace.endpos[0] - PRVM_serveredictvector(passedict, origin)[0], trace.endpos[1] - PRVM_serveredictvector(passedict, origin)[1], trace.endpos[2] - PRVM_serveredictvector(passedict, origin)[2], trace.startsolid ? " startstuck" : "", endstuck ? " endstuck" : "");
 606         }
 607         return trace;
 608 }
 609 #endif
 610
 611 int SV_PointSuperContents(const vec3_t point)
 612 {
 613         prvm_prog_t *prog = SVVM_prog;
 614         int supercontents = 0;
 615         int i;
 616         prvm_edict_t *touch;
 617         vec3_t transformed;
 618         // matrices to transform into/out of other entity's space
 619         matrix4x4_t matrix, imatrix;
 620         // model of other entity
 621         model_t *model;
 622         int frame;
 623         // list of entities to test for collisions
 624         int numtouchedicts;
 625         static prvm_edict_t *touchedicts[MAX_EDICTS];
 626
 627         // get world supercontents at this point
 628         if (sv.worldmodel && sv.worldmodel->PointSuperContents)
 629                 supercontents = sv.worldmodel->PointSuperContents(sv.worldmodel, 0, point);
 630
 631         // if sv_gameplayfix_swiminbmodels is off we're done
 632         if (!sv_gameplayfix_swiminbmodels.integer)
 633                 return supercontents;
 634
 635         // get list of entities at this point
 636         numtouchedicts = SV_EntitiesInBox(point, point, MAX_EDICTS, touchedicts);
 637         if (numtouchedicts > MAX_EDICTS)
 638         {
 639                 // this never happens
 640                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 641                 numtouchedicts = MAX_EDICTS;
 642         }
 643         for (i = 0;i < numtouchedicts;i++)
 644         {
 645                 touch = touchedicts[i];
 646
 647                 // we only care about SOLID_BSP for pointcontents
 648                 if (PRVM_serveredictfloat(touch, solid) != SOLID_BSP)
 649                         continue;
 650
 651                 // might interact, so do an exact clip
 652                 model = SV_GetModelFromEdict(touch);
 653                 if (!model || !model->PointSuperContents)
 654                         continue;
 655                 Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_serveredictvector(touch, origin)[0], PRVM_serveredictvector(touch, origin)[1], PRVM_serveredictvector(touch, origin)[2], PRVM_serveredictvector(touch, angles)[0], PRVM_serveredictvector(touch, angles)[1], PRVM_serveredictvector(touch, angles)[2], 1);
 656                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 657                 Matrix4x4_Transform(&imatrix, point, transformed);
 658                 frame = (int)PRVM_serveredictfloat(touch, frame);
 659                 supercontents |= model->PointSuperContents(model, bound(0, frame, (model->numframes - 1)), transformed);
 660         }
 661
 662         return supercontents;
 663 }
 664
 665 /*
 666 ===============================================================================
 667
 668 Linking entities into the world culling system
 669
 670 ===============================================================================
 671 */
 672
 673 int SV_EntitiesInBox(const vec3_t mins, const vec3_t maxs, int maxedicts, prvm_edict_t **resultedicts)
 674 {
 675         prvm_prog_t *prog = SVVM_prog;
 676         vec3_t paddedmins, paddedmaxs;
 677         if (maxedicts < 1 || resultedicts == NULL)
 678                 return 0;
 679         // LadyHavoc: discovered this actually causes its own bugs (dm6 teleporters being too close to info_teleport_destination)
 680         //VectorSet(paddedmins, mins[0] - 10, mins[1] - 10, mins[2] - 1);
 681         //VectorSet(paddedmaxs, maxs[0] + 10, maxs[1] + 10, maxs[2] + 1);
 682         VectorCopy(mins, paddedmins);
 683         VectorCopy(maxs, paddedmaxs);
 684         if (sv_areadebug.integer)
 685         {
 686                 int numresultedicts = 0;
 687                 int edictindex;
 688                 prvm_edict_t *ed;
 689                 for (edictindex = 1;edictindex < prog->num_edicts;edictindex++)
 690                 {
 691                         ed = PRVM_EDICT_NUM(edictindex);
 692                         if (!ed->free && BoxesOverlap(PRVM_serveredictvector(ed, absmin), PRVM_serveredictvector(ed, absmax), paddedmins, paddedmaxs))
 693                         {
 694                                 resultedicts[numresultedicts++] = ed;
 695                                 if (numresultedicts == maxedicts)
 696                                         break;
 697                         }
 698                 }
 699                 return numresultedicts;
 700         }
 701         else
 702                 return World_EntitiesInBox(&sv.world, paddedmins, paddedmaxs, maxedicts, resultedicts);
 703 }
 704
 705 void SV_LinkEdict_TouchAreaGrid_Call(prvm_edict_t *touch, prvm_edict_t *ent)
 706 {
 707         prvm_prog_t *prog = SVVM_prog;
 708         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(touch);
 709         PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(ent);
 710         PRVM_serverglobalfloat(time) = sv.time;
 711         PRVM_serverglobalfloat(trace_allsolid) = false;
 712         PRVM_serverglobalfloat(trace_startsolid) = false;
 713         PRVM_serverglobalfloat(trace_fraction) = 1;
 714         PRVM_serverglobalfloat(trace_inwater) = false;
 715         PRVM_serverglobalfloat(trace_inopen) = true;
 716         VectorCopy (PRVM_serveredictvector(touch, origin), PRVM_serverglobalvector(trace_endpos));
 717         VectorSet (PRVM_serverglobalvector(trace_plane_normal), 0, 0, 1);
 718         PRVM_serverglobalfloat(trace_plane_dist) = 0;
 719         PRVM_serverglobaledict(trace_ent) = PRVM_EDICT_TO_PROG(ent);
 720         PRVM_serverglobalfloat(trace_dpstartcontents) = 0;
 721         PRVM_serverglobalfloat(trace_dphitcontents) = 0;
 722         PRVM_serverglobalfloat(trace_dphitq3surfaceflags) = 0;
 723         PRVM_serverglobalstring(trace_dphittexturename) = 0;
 724         prog->ExecuteProgram(prog, PRVM_serveredictfunction(touch, touch), "QC function self.touch is missing");
 725 }
 726
 727 void SV_LinkEdict_TouchAreaGrid(prvm_edict_t *ent)
 728 {
 729         prvm_prog_t *prog = SVVM_prog;
 730         int i, numtouchedicts, old_self, old_other;
 731         prvm_edict_t *touch;
 732         static prvm_edict_t *touchedicts[MAX_EDICTS];
 733
 734         if (ent == prog->edicts)
 735                 return;         // don't add the world
 736
 737         if (ent->free)
 738                 return;
 739
 740         if (PRVM_serveredictfloat(ent, solid) == SOLID_NOT)
 741                 return;
 742
 743         // build a list of edicts to touch, because the link loop can be corrupted
 744         // by IncreaseEdicts called during touch functions
 745         numtouchedicts = SV_EntitiesInBox(ent->priv.server->areamins, ent->priv.server->areamaxs, MAX_EDICTS, touchedicts);
 746         if (numtouchedicts > MAX_EDICTS)
 747         {
 748                 // this never happens
 749                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 750                 numtouchedicts = MAX_EDICTS;
 751         }
 752
 753         old_self = PRVM_serverglobaledict(self);
 754         old_other = PRVM_serverglobaledict(other);
 755         for (i = 0;i < numtouchedicts;i++)
 756         {
 757                 touch = touchedicts[i];
 758                 if (touch != ent && (int)PRVM_serveredictfloat(touch, solid) == SOLID_TRIGGER && PRVM_serveredictfunction(touch, touch))
 759                 {
 760                         SV_LinkEdict_TouchAreaGrid_Call(touch, ent);
 761                 }
 762         }
 763         PRVM_serverglobaledict(self) = old_self;
 764         PRVM_serverglobaledict(other) = old_other;
 765 }
 766
 767 static void RotateBBox(const vec3_t mins, const vec3_t maxs, const vec3_t angles, vec3_t rotatedmins, vec3_t rotatedmaxs)
 768 {
 769         vec3_t v, u;
 770         matrix4x4_t m;
 771         Matrix4x4_CreateFromQuakeEntity(&m, 0, 0, 0, angles[PITCH], angles[YAW], angles[ROLL], 1.0);
 772
 773         v[0] = mins[0]; v[1] = mins[1]; v[2] = mins[2]; Matrix4x4_Transform(&m, v, u);
 774                 VectorCopy(u, rotatedmins); VectorCopy(u, rotatedmaxs);
 775         v[0] = maxs[0]; v[1] = mins[1]; v[2] = mins[2]; Matrix4x4_Transform(&m, v, u);
 776                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 777                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 778         v[0] = mins[0]; v[1] = maxs[1]; v[2] = mins[2]; Matrix4x4_Transform(&m, v, u);
 779                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 780                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 781         v[0] = maxs[0]; v[1] = maxs[1]; v[2] = mins[2]; Matrix4x4_Transform(&m, v, u);
 782                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 783                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 784         v[0] = mins[0]; v[1] = mins[1]; v[2] = maxs[2]; Matrix4x4_Transform(&m, v, u);
 785                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 786                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 787         v[0] = maxs[0]; v[1] = mins[1]; v[2] = maxs[2]; Matrix4x4_Transform(&m, v, u);
 788                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 789                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 790         v[0] = mins[0]; v[1] = maxs[1]; v[2] = maxs[2]; Matrix4x4_Transform(&m, v, u);
 791                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 792                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 793         v[0] = maxs[0]; v[1] = maxs[1]; v[2] = maxs[2]; Matrix4x4_Transform(&m, v, u);
 794                 if(rotatedmins[0] > u[0]) { rotatedmins[0] = u[0]; } if(rotatedmins[1] > u[1]) { rotatedmins[1] = u[1]; } if(rotatedmins[2] > u[2]) { rotatedmins[2] = u[2]; }
 795                 if(rotatedmaxs[0] < u[0]) { rotatedmaxs[0] = u[0]; } if(rotatedmaxs[1] < u[1]) { rotatedmaxs[1] = u[1]; } if(rotatedmaxs[2] < u[2]) { rotatedmaxs[2] = u[2]; }
 796 }
 797
 798 /*
 799 ===============
 800 SV_LinkEdict
 801
 802 ===============
 803 */
 804 void SV_LinkEdict (prvm_edict_t *ent)
 805 {
 806         prvm_prog_t *prog = SVVM_prog;
 807         model_t *model;
 808         vec3_t mins, maxs, entmins, entmaxs, entangles;
 809         int modelindex;
 810
 811         if (ent == prog->edicts)
 812                 return;         // don't add the world
 813
 814         if (ent->free)
 815                 return;
 816
 817         modelindex = (int)PRVM_serveredictfloat(ent, modelindex);
 818         if (modelindex < 0 || modelindex >= MAX_MODELS)
 819         {
 820                 Con_Printf("edict %i: SOLID_BSP with invalid modelindex!\n", PRVM_NUM_FOR_EDICT(ent));
 821                 modelindex = 0;
 822         }
 823         model = SV_GetModelByIndex(modelindex);
 824
 825         VM_GenerateFrameGroupBlend(prog, ent->priv.server->framegroupblend, ent);
 826         VM_FrameBlendFromFrameGroupBlend(ent->priv.server->frameblend, ent->priv.server->framegroupblend, model, sv.time);
 827         VM_UpdateEdictSkeleton(prog, ent, model, ent->priv.server->frameblend);
 828
 829 // set the abs box
 830
 831         if (PRVM_serveredictfloat(ent, movetype) == MOVETYPE_PHYSICS)
 832         {
 833                 // TODO maybe should do this for rotating SOLID_BSP too? Would behave better with rotating doors
 834                 // TODO special handling for spheres?
 835                 VectorCopy(PRVM_serveredictvector(ent, mins), entmins);
 836                 VectorCopy(PRVM_serveredictvector(ent, maxs), entmaxs);
 837                 VectorCopy(PRVM_serveredictvector(ent, angles), entangles);
 838                 RotateBBox(entmins, entmaxs, entangles, mins, maxs);
 839                 VectorAdd(PRVM_serveredictvector(ent, origin), mins, mins);
 840                 VectorAdd(PRVM_serveredictvector(ent, origin), maxs, maxs);
 841         }
 842         else if (PRVM_serveredictfloat(ent, solid) == SOLID_BSP)
 843         {
 844                 if (model != NULL)
 845                 {
 846                         if (!model->TraceBox)
 847                                 Con_DPrintf("edict %i: SOLID_BSP with non-collidable model\n", PRVM_NUM_FOR_EDICT(ent));
 848
 849                         if (PRVM_serveredictvector(ent, angles)[0] || PRVM_serveredictvector(ent, angles)[2] || PRVM_serveredictvector(ent, avelocity)[0] || PRVM_serveredictvector(ent, avelocity)[2])
 850                         {
 851                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->rotatedmins, mins);
 852                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->rotatedmaxs, maxs);
 853                         }
 854                         else if (PRVM_serveredictvector(ent, angles)[1] || PRVM_serveredictvector(ent, avelocity)[1])
 855                         {
 856                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->yawmins, mins);
 857                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->yawmaxs, maxs);
 858                         }
 859                         else
 860                         {
 861                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->normalmins, mins);
 862                                 VectorAdd(PRVM_serveredictvector(ent, origin), model->normalmaxs, maxs);
 863                         }
 864                 }
 865                 else
 866                 {
 867                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
 868                         VectorAdd(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, mins), mins);
 869                         VectorAdd(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, maxs), maxs);
 870                 }
 871         }
 872         else
 873         {
 874                 VectorAdd(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, mins), mins);
 875                 VectorAdd(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, maxs), maxs);
 876         }
 877
 878         if (sv_legacy_bbox_expand.integer)
 879         {
 880                 if ((int)PRVM_serveredictfloat(ent, flags) & FL_ITEM)
 881                 {
 882                         // to make items easier to pick up and allow them to be grabbed off
 883                         // of shelves, the abs sizes are expanded
 884                         mins[0] -= 15;
 885                         mins[1] -= 15;
 886                         mins[2] -= 1;
 887                         maxs[0] += 15;
 888                         maxs[1] += 15;
 889                         maxs[2] += 1;
 890                 }
 891                 else
 892                 {
 893                         // because movement is clipped an epsilon away from an actual edge,
 894                         // we must fully check even when bounding boxes don't quite touch
 895                         mins[0] -= 1;
 896                         mins[1] -= 1;
 897                         mins[2] -= 1;
 898                         maxs[0] += 1;
 899                         maxs[1] += 1;
 900                         maxs[2] += 1;
 901                 }
 902         }
 903
 904         VectorCopy(mins, PRVM_serveredictvector(ent, absmin));
 905         VectorCopy(maxs, PRVM_serveredictvector(ent, absmax));
 906
 907         World_LinkEdict(&sv.world, ent, mins, maxs, sv_areagrid_link_SOLID_NOT.integer);
 908 }
 909
 910 /*
 911 ===============================================================================
 912
 913 Utility functions
 914
 915 ===============================================================================
 916 */
 917
 918 /*
 919 ============
 920 SV_TestEntityPosition
 921
 922 returns true if the entity is in solid currently
 923 ============
 924 */
 925 static int SV_TestEntityPosition (prvm_edict_t *ent, vec3_t offset)
 926 {
 927         prvm_prog_t *prog = SVVM_prog;
 928         int hitsupercontentsmask = SV_GenericHitSuperContentsMask(ent);
 929         int skipsupercontentsmask = 0;
 930         int skipmaterialflagsmask = 0;
 931         vec3_t org, entorigin, entmins, entmaxs;
 932         trace_t trace;
 933         VectorAdd(PRVM_serveredictvector(ent, origin), offset, org);
 934         VectorCopy(PRVM_serveredictvector(ent, origin), entorigin);
 935         VectorCopy(PRVM_serveredictvector(ent, mins), entmins);
 936         VectorCopy(PRVM_serveredictvector(ent, maxs), entmaxs);
 937         trace = SV_TraceBox(org, entmins, entmaxs, entorigin, ((PRVM_serveredictfloat(ent, movetype) == MOVETYPE_FLY_WORLDONLY) ? MOVE_WORLDONLY : MOVE_NOMONSTERS), ent, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value);
 938         if (trace.startsupercontents & hitsupercontentsmask)
 939                 return true;
 940         else
 941         {
 942                 if (sv.worldmodel->brushq1.numclipnodes && !VectorCompare(PRVM_serveredictvector(ent, mins), PRVM_serveredictvector(ent, maxs)))
 943                 {
 944                         // q1bsp/hlbsp use hulls and if the entity does not exactly match
 945                         // a hull size it is incorrectly tested, so this code tries to
 946                         // 'fix' it slightly...
 947                         // FIXME: this breaks entities larger than the hull size
 948                         int i;
 949                         vec3_t v, m1, m2, s;
 950                         VectorAdd(org, entmins, m1);
 951                         VectorAdd(org, entmaxs, m2);
 952                         VectorSubtract(m2, m1, s);
 953 #define EPSILON (1.0f / 32.0f)
 954                         if (s[0] >= EPSILON*2) {m1[0] += EPSILON;m2[0] -= EPSILON;}
 955                         if (s[1] >= EPSILON*2) {m1[1] += EPSILON;m2[1] -= EPSILON;}
 956                         if (s[2] >= EPSILON*2) {m1[2] += EPSILON;m2[2] -= EPSILON;}
 957                         for (i = 0;i < 8;i++)
 958                         {
 959                                 v[0] = (i & 1) ? m2[0] : m1[0];
 960                                 v[1] = (i & 2) ? m2[1] : m1[1];
 961                                 v[2] = (i & 4) ? m2[2] : m1[2];
 962                                 if (SV_PointSuperContents(v) & hitsupercontentsmask)
 963                                         return true;
 964                         }
 965                 }
 966         }
 967         // if the trace found a better position for the entity, move it there
 968         if (VectorDistance2(trace.endpos, PRVM_serveredictvector(ent, origin)) >= 0.0001)
 969         {
 970 #if 0
 971                 // please switch back to this code when trace.endpos sometimes being in solid bug is fixed
 972                 VectorCopy(trace.endpos, PRVM_serveredictvector(ent, origin));
 973 #else
 974                 // verify if the endpos is REALLY outside solid
 975                 VectorCopy(trace.endpos, org);
 976                 trace = SV_TraceBox(org, entmins, entmaxs, org, MOVE_NOMONSTERS, ent, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value);
 977                 if(trace.startsolid)
 978                         Con_Printf("SV_TestEntityPosition: trace.endpos detected to be in solid. NOT using it.\n");
 979                 else
 980                         VectorCopy(org, PRVM_serveredictvector(ent, origin));
 981 #endif
 982         }
 983         return false;
 984 }
 985
 986 // DRESK - Support for Entity Contents Transition Event
 987 /*
 988 ================
 989 SV_CheckContentsTransition
 990
 991 returns true if entity had a valid contentstransition function call
 992 ================
 993 */
 994 static int SV_CheckContentsTransition(prvm_edict_t *ent, const int nContents)
 995 {
 996         prvm_prog_t *prog = SVVM_prog;
 997         int bValidFunctionCall;
 998
 999         // Default Valid Function Call to False
1000         bValidFunctionCall = false;
1001
1002         if(PRVM_serveredictfloat(ent, watertype) != nContents)
1003         { // Changed Contents
1004                 // Acquire Contents Transition Function from QC
1005                 if(PRVM_serveredictfunction(ent, contentstransition))
1006                 { // Valid Function; Execute
1007                         // Assign Valid Function
1008                         bValidFunctionCall = true;
1009                         // Prepare Parameters (Original Contents, New Contents)
1010                         // Original Contents
1011                         PRVM_G_FLOAT(OFS_PARM0) = PRVM_serveredictfloat(ent, watertype);
1012                         // New Contents
1013                         PRVM_G_FLOAT(OFS_PARM1) = nContents;
1014                         // Assign Self
1015                         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
1016                         // Set Time
1017                         PRVM_serverglobalfloat(time) = sv.time;
1018                         // Execute VM Function
1019                         prog->ExecuteProgram(prog, PRVM_serveredictfunction(ent, contentstransition), "contentstransition: NULL function");
1020                 }
1021         }
1022
1023         // Return if Function Call was Valid
1024         return bValidFunctionCall;
1025 }
1026
1027
1028 /*
1029 ================
1030 SV_CheckVelocity
1031 ================
1032 */
1033 void SV_CheckVelocity (prvm_edict_t *ent)
1034 {
1035         prvm_prog_t *prog = SVVM_prog;
1036         int i;
1037         float wishspeed;
1038
1039 //
1040 // bound velocity
1041 //
1042         for (i=0 ; i<3 ; i++)
1043         {
1044                 if (isnan(PRVM_serveredictvector(ent, velocity)[i]))
1045                 {
1046                         Con_Printf("Got a NaN velocity on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
1047                         PRVM_serveredictvector(ent, velocity)[i] = 0;
1048                 }
1049                 if (isnan(PRVM_serveredictvector(ent, origin)[i]))
1050                 {
1051                         Con_Printf("Got a NaN origin on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
1052                         PRVM_serveredictvector(ent, origin)[i] = 0;
1053                 }
1054         }
1055
1056         // LadyHavoc: a hack to ensure that the (rather silly) id1 quakec
1057         // player_run/player_stand1 does not horribly malfunction if the
1058         // velocity becomes a denormalized float
1059         if (VectorLength2(PRVM_serveredictvector(ent, velocity)) < 0.0000001)
1060                 VectorClear(PRVM_serveredictvector(ent, velocity));
1061
1062         // LadyHavoc: max velocity fix, inspired by Maddes's source fixes, but this is faster
1063         wishspeed = DotProduct(PRVM_serveredictvector(ent, velocity), PRVM_serveredictvector(ent, velocity));
1064         if (wishspeed > sv_maxvelocity.value * sv_maxvelocity.value)
1065         {
1066                 wishspeed = sv_maxvelocity.value / sqrt(wishspeed);
1067                 PRVM_serveredictvector(ent, velocity)[0] *= wishspeed;
1068                 PRVM_serveredictvector(ent, velocity)[1] *= wishspeed;
1069                 PRVM_serveredictvector(ent, velocity)[2] *= wishspeed;
1070         }
1071 }
1072
1073 /*
1074 =============
1075 SV_RunThink
1076
1077 Runs thinking code if time.  There is some play in the exact time the think
1078 function will be called, because it is called before any movement is done
1079 in a frame.  Not used for pushmove objects, because they must be exact.
1080 Returns false if the entity removed itself.
1081 =============
1082 */
1083 static qbool SV_RunThink (prvm_edict_t *ent)
1084 {
1085         prvm_prog_t *prog = SVVM_prog;
1086         int iterations;
1087
1088         // don't let things stay in the past.
1089         // it is possible to start that way by a trigger with a local time.
1090         if (PRVM_serveredictfloat(ent, nextthink) <= 0 || PRVM_serveredictfloat(ent, nextthink) > sv.time + sv.frametime)
1091                 return true;
1092
1093         for (iterations = 0;iterations < 128  && !ent->free;iterations++)
1094         {
1095                 PRVM_serverglobalfloat(time) = max(sv.time, PRVM_serveredictfloat(ent, nextthink));
1096                 PRVM_serveredictfloat(ent, nextthink) = 0;
1097                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
1098                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(prog->edicts);
1099                 prog->ExecuteProgram(prog, PRVM_serveredictfunction(ent, think), "QC function self.think is missing");
1100                 // mods often set nextthink to time to cause a think every frame,
1101                 // we don't want to loop in that case, so exit if the new nextthink is
1102                 // <= the time the qc was told, also exit if it is past the end of the
1103                 // frame
1104                 if (PRVM_serveredictfloat(ent, nextthink) <= PRVM_serverglobalfloat(time) || PRVM_serveredictfloat(ent, nextthink) > sv.time + sv.frametime || !sv_gameplayfix_multiplethinksperframe.integer)
1105                         break;
1106         }
1107         return !ent->free;
1108 }
1109
1110 /*
1111 ==================
1112 SV_Impact
1113
1114 Two entities have touched, so run their touch functions
1115 ==================
1116 */
1117 static void SV_Impact (prvm_edict_t *e1, trace_t *trace)
1118 {
1119         prvm_prog_t *prog = SVVM_prog;
1120         int restorevm_tempstringsbuf_cursize;
1121         int old_self, old_other;
1122         prvm_edict_t *e2 = (prvm_edict_t *)trace->ent;
1123
1124         old_self = PRVM_serverglobaledict(self);
1125         old_other = PRVM_serverglobaledict(other);
1126         restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
1127
1128         VM_SetTraceGlobals(prog, trace);
1129
1130         if (!e1->free && !e2->free && PRVM_serveredictfunction(e1, touch) && PRVM_serveredictfloat(e1, solid) != SOLID_NOT)
1131         {
1132                 PRVM_serverglobalfloat(time) = sv.time;
1133                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(e1);
1134                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(e2);
1135                 prog->ExecuteProgram(prog, PRVM_serveredictfunction(e1, touch), "QC function self.touch is missing");
1136         }
1137
1138         if (!e1->free && !e2->free && PRVM_serveredictfunction(e2, touch) && PRVM_serveredictfloat(e2, solid) != SOLID_NOT)
1139         {
1140                 PRVM_serverglobalfloat(time) = sv.time;
1141                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(e2);
1142                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(e1);
1143                 VectorCopy(PRVM_serveredictvector(e2, origin), PRVM_serverglobalvector(trace_endpos));
1144                 VectorNegate(trace->plane.normal, PRVM_serverglobalvector(trace_plane_normal));
1145                 PRVM_serverglobalfloat(trace_plane_dist) = -trace->plane.dist;
1146                 PRVM_serverglobaledict(trace_ent) = PRVM_EDICT_TO_PROG(e1);
1147                 PRVM_serverglobalfloat(trace_dpstartcontents) = 0;
1148                 PRVM_serverglobalfloat(trace_dphitcontents) = 0;
1149                 PRVM_serverglobalfloat(trace_dphitq3surfaceflags) = 0;
1150                 PRVM_serverglobalstring(trace_dphittexturename) = 0;
1151                 prog->ExecuteProgram(prog, PRVM_serveredictfunction(e2, touch), "QC function self.touch is missing");
1152         }
1153
1154         PRVM_serverglobaledict(self) = old_self;
1155         PRVM_serverglobaledict(other) = old_other;
1156         prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
1157 }
1158
1159
1160 /*
1161 ==================
1162 ClipVelocity
1163
1164 Slide off of the impacting object
1165 returns the blocked flags (1 = floor, 2 = step / wall)
1166 ==================
1167 */
1168 #define STOP_EPSILON 0.1
1169 static void ClipVelocity (prvm_vec3_t in, vec3_t normal, prvm_vec3_t out, prvm_vec_t overbounce)
1170 {
1171         int i;
1172         float backoff;
1173
1174         backoff = -DotProduct (in, normal) * overbounce;
1175         VectorMA(in, backoff, normal, out);
1176
1177         for (i = 0;i < 3;i++)
1178                 if (out[i] > -STOP_EPSILON && out[i] < STOP_EPSILON)
1179                         out[i] = 0;
1180 }
1181
1182
1183 /*
1184 ============
1185 SV_FlyMove
1186
1187 The basic solid body movement clip that slides along multiple planes
1188 Returns the clipflags if the velocity was modified (hit something solid)
1189 1 = floor
1190 2 = wall / step
1191 4 = dead stop
1192 8 = teleported by touch method
1193 If stepnormal is not NULL, the plane normal of any vertical wall hit will be stored
1194 ============
1195 */
1196 static float SV_Gravity (prvm_edict_t *ent);
1197 static qbool SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qbool dolink, qbool checkstuck);
1198 #define MAX_CLIP_PLANES 5
1199 static int SV_FlyMove (prvm_edict_t *ent, float time, qbool applygravity, float *stepnormal, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float stepheight)
1200 {
1201         prvm_prog_t *prog = SVVM_prog;
1202         unsigned int i, j, numplanes, blocked, bumpcount;
1203         float d, time_left, gravity;
1204         vec3_t dir, push, planes[MAX_CLIP_PLANES];
1205         prvm_vec3_t primal_velocity, original_velocity, new_velocity, restore_velocity;
1206 #if 0
1207         vec3_t end;
1208 #endif
1209         trace_t trace;
1210         if (time <= 0)
1211                 return 0;
1212         gravity = 0;
1213
1214         VectorCopy(PRVM_serveredictvector(ent, velocity), restore_velocity);
1215
1216         if(applygravity)
1217         {
1218                 gravity = SV_Gravity(ent);
1219
1220                 if(!sv_gameplayfix_nogravityonground.integer || !((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND))
1221                 {
1222                         if (sv_gameplayfix_gravityunaffectedbyticrate.integer)
1223                                 PRVM_serveredictvector(ent, velocity)[2] -= gravity * 0.5f;
1224                         else
1225                                 PRVM_serveredictvector(ent, velocity)[2] -= gravity;
1226                 }
1227         }
1228
1229         blocked = 0;
1230         VectorCopy(PRVM_serveredictvector(ent, velocity), original_velocity);
1231         VectorCopy(PRVM_serveredictvector(ent, velocity), primal_velocity);
1232         numplanes = 0;
1233         time_left = time;
1234         for (bumpcount = 0;bumpcount < MAX_CLIP_PLANES;bumpcount++)
1235         {
1236                 if (!PRVM_serveredictvector(ent, velocity)[0] && !PRVM_serveredictvector(ent, velocity)[1] && !PRVM_serveredictvector(ent, velocity)[2])
1237                         break;
1238
1239                 VectorScale(PRVM_serveredictvector(ent, velocity), time_left, push);
1240                 if(!SV_PushEntity(&trace, ent, push, false, true))
1241                 {
1242                         // we got teleported by a touch function
1243                         // let's abort the move
1244                         blocked |= 8;
1245                         break;
1246                 }
1247
1248                 // this code is used by MOVETYPE_WALK and MOVETYPE_STEP and SV_UnstickEntity
1249                 // abort move if we're stuck in the world (and didn't make it out)
1250                 if (trace.worldstartsolid && trace.allsolid && trace.startdepth < 0)
1251                 {
1252                         VectorCopy(restore_velocity, PRVM_serveredictvector(ent, velocity));
1253                         return 3;
1254                 }
1255
1256                 if (trace.fraction == 1)
1257                         break;
1258
1259                 time_left *= 1 - trace.fraction;
1260
1261                 if (trace.plane.normal[2])
1262                 {
1263                         if (trace.plane.normal[2] > 0.7)
1264                         {
1265                                 // floor
1266                                 blocked |= 1;
1267
1268                                 if (!trace.ent)
1269                                 {
1270                                         Con_Printf ("SV_FlyMove: !trace.ent");
1271                                         trace.ent = prog->edicts;
1272                                 }
1273
1274                                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) | FL_ONGROUND;
1275                                 PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(trace.ent);
1276                         }
1277                 }
1278                 else if (stepheight)
1279                 {
1280                         // step - handle it immediately
1281                         vec3_t org;
1282                         vec3_t steppush;
1283                         trace_t steptrace;
1284                         trace_t steptrace2;
1285                         trace_t steptrace3;
1286                         //Con_Printf("step %f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
1287                         VectorSet(steppush, 0, 0, stepheight);
1288                         VectorScale(PRVM_serveredictvector(ent, velocity), time_left, push);
1289                         VectorCopy(PRVM_serveredictvector(ent, origin), org);
1290                         if(!SV_PushEntity(&steptrace, ent, steppush, false, true))
1291                         {
1292                                 blocked |= 8;
1293                                 break;
1294                         }
1295                         //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
1296                         if(!SV_PushEntity(&steptrace2, ent, push, false, true))
1297                         {
1298                                 blocked |= 8;
1299                                 break;
1300                         }
1301                         //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
1302                         VectorSet(steppush, 0, 0, org[2] - PRVM_serveredictvector(ent, origin)[2]);
1303                         if(!SV_PushEntity(&steptrace3, ent, steppush, false, true))
1304                         {
1305                                 blocked |= 8;
1306                                 break;
1307                         }
1308                         //Con_Printf("%f %f %f : ", PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2]);
1309                         // accept the new position if it made some progress...
1310                         // previously this checked if absolute distance >= 0.03125 which made stepping up unreliable
1311                         if (PRVM_serveredictvector(ent, origin)[0] - org[0] || PRVM_serveredictvector(ent, origin)[1] - org[1])
1312                         {
1313                                 //Con_Printf("accepted (delta %f %f %f)\n", PRVM_serveredictvector(ent, origin)[0] - org[0], PRVM_serveredictvector(ent, origin)[1] - org[1], PRVM_serveredictvector(ent, origin)[2] - org[2]);
1314                                 trace = steptrace2;
1315                                 VectorCopy(PRVM_serveredictvector(ent, origin), trace.endpos);
1316                                 time_left *= 1 - trace.fraction;
1317                                 numplanes = 0;
1318                                 continue;
1319                         }
1320                         else
1321                         {
1322                                 //Con_Printf("REJECTED (delta %f %f %f)\n", PRVM_serveredictvector(ent, origin)[0] - org[0], PRVM_serveredictvector(ent, origin)[1] - org[1], PRVM_serveredictvector(ent, origin)[2] - org[2]);
1323                                 VectorCopy(org, PRVM_serveredictvector(ent, origin));
1324                         }
1325                 }
1326                 else
1327                 {
1328                         // step - return it to caller
1329                         blocked |= 2;
1330                         // save the trace for player extrafriction
1331                         if (stepnormal)
1332                                 VectorCopy(trace.plane.normal, stepnormal);
1333                 }
1334
1335                 // Unlike some other movetypes Quake's SV_FlyMove calls SV_Impact only after setting ONGROUND which id1 fiends rely on.
1336                 // If we stepped up (sv_gameplayfix_stepmultipletimes) this will impact the steptrace2 plane instead of the original.
1337                 if (PRVM_serveredictfloat(ent, solid) >= SOLID_TRIGGER && trace.ent)
1338                         SV_Impact(ent, &trace);
1339                 if (ent->free)
1340                         return blocked; // removed by the impact function
1341
1342                 if (trace.fraction >= 0.001)
1343                 {
1344                         // actually covered some distance
1345                         VectorCopy(PRVM_serveredictvector(ent, velocity), original_velocity);
1346                         numplanes = 0;
1347                 }
1348
1349                 // clipped to another plane
1350                 if (numplanes >= MAX_CLIP_PLANES)
1351                 {
1352                         // this shouldn't really happen
1353                         VectorClear(PRVM_serveredictvector(ent, velocity));
1354                         blocked = 3;
1355                         break;
1356                 }
1357
1358                 /*
1359                 for (i = 0;i < numplanes;i++)
1360                         if (DotProduct(trace.plane.normal, planes[i]) > 0.99)
1361                                 break;
1362                 if (i < numplanes)
1363                 {
1364                         VectorAdd(PRVM_serveredictvector(ent, velocity), trace.plane.normal, PRVM_serveredictvector(ent, velocity));
1365                         continue;
1366                 }
1367                 */
1368
1369                 VectorCopy(trace.plane.normal, planes[numplanes]);
1370                 numplanes++;
1371
1372                 // modify original_velocity so it parallels all of the clip planes
1373                 for (i = 0;i < numplanes;i++)
1374                 {
1375                         ClipVelocity(original_velocity, planes[i], new_velocity, 1);
1376                         for (j = 0;j < numplanes;j++)
1377                         {
1378                                 if (j != i)
1379                                 {
1380                                         // not ok
1381                                         if (DotProduct(new_velocity, planes[j]) < 0)
1382                                                 break;
1383                                 }
1384                         }
1385                         if (j == numplanes)
1386                                 break;
1387                 }
1388
1389                 if (i != numplanes)
1390                 {
1391                         // go along this plane
1392                         VectorCopy(new_velocity, PRVM_serveredictvector(ent, velocity));
1393                 }
1394                 else
1395                 {
1396                         // go along the crease
1397                         if (numplanes != 2)
1398                         {
1399                                 VectorClear(PRVM_serveredictvector(ent, velocity));
1400                                 blocked = 7;
1401                                 break;
1402                         }
1403                         CrossProduct(planes[0], planes[1], dir);
1404                         // LadyHavoc: thanks to taniwha of QuakeForge for pointing out this fix for slowed falling in corners
1405                         VectorNormalize(dir);
1406                         d = DotProduct(dir, PRVM_serveredictvector(ent, velocity));
1407                         VectorScale(dir, d, PRVM_serveredictvector(ent, velocity));
1408                 }
1409
1410                 // if current velocity is against the original velocity,
1411                 // stop dead to avoid tiny occilations in sloping corners
1412                 if (DotProduct(PRVM_serveredictvector(ent, velocity), primal_velocity) <= 0)
1413                 {
1414                         VectorClear(PRVM_serveredictvector(ent, velocity));
1415                         break;
1416                 }
1417         }
1418
1419         //Con_Printf("entity %i final: blocked %i velocity %f %f %f\n", ent - prog->edicts, blocked, PRVM_serveredictvector(ent, velocity)[0], PRVM_serveredictvector(ent, velocity)[1], PRVM_serveredictvector(ent, velocity)[2]);
1420
1421         /*
1422         if ((blocked & 1) == 0 && bumpcount > 1)
1423         {
1424                 // LadyHavoc: fix the 'fall to your death in a wedge corner' glitch
1425                 // flag ONGROUND if there's ground under it
1426                 trace = SV_TraceBox(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, mins), PRVM_serveredictvector(ent, maxs), end, MOVE_NORMAL, ent, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
1427         }
1428         */
1429
1430         // LadyHavoc: this came from QW and allows you to get out of water more easily
1431         if (sv_gameplayfix_easierwaterjump.integer && ((int)PRVM_serveredictfloat(ent, flags) & FL_WATERJUMP) && !(blocked & 8))
1432                 VectorCopy(primal_velocity, PRVM_serveredictvector(ent, velocity));
1433
1434         if(applygravity)
1435         {
1436                 if(!sv_gameplayfix_nogravityonground.integer || !((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND))
1437                 {
1438                         if (sv_gameplayfix_gravityunaffectedbyticrate.integer)
1439                                 PRVM_serveredictvector(ent, velocity)[2] -= gravity * 0.5f;
1440                 }
1441         }
1442
1443         return blocked;
1444 }
1445
1446 /*
1447 ============
1448 SV_Gravity
1449
1450 ============
1451 */
1452 static float SV_Gravity (prvm_edict_t *ent)
1453 {
1454         prvm_prog_t *prog = SVVM_prog;
1455         float ent_gravity;
1456
1457         ent_gravity = PRVM_serveredictfloat(ent, gravity);
1458         if (!ent_gravity)
1459                 ent_gravity = 1.0f;
1460         return ent_gravity * sv_gravity.value * sv.frametime;
1461 }
1462
1463
1464 /*
1465 ===============================================================================
1466
1467 PUSHMOVE
1468
1469 ===============================================================================
1470 */
1471
1472 static qbool SV_NudgeOutOfSolid_PivotIsKnownGood(prvm_edict_t *ent, vec3_t pivot)
1473 {
1474         prvm_prog_t *prog = SVVM_prog;
1475         int bump;
1476         trace_t stucktrace;
1477         vec3_t stuckorigin;
1478         vec3_t stuckmins, stuckmaxs;
1479         vec3_t goodmins, goodmaxs;
1480         vec3_t testorigin;
1481         vec_t nudge;
1482         vec3_t move;
1483         VectorCopy(PRVM_serveredictvector(ent, origin), stuckorigin);
1484         VectorCopy(PRVM_serveredictvector(ent, mins), stuckmins);
1485         VectorCopy(PRVM_serveredictvector(ent, maxs), stuckmaxs);
1486         VectorCopy(pivot, goodmins);
1487         VectorCopy(pivot, goodmaxs);
1488         for (bump = 0;bump < 6;bump++)
1489         {
1490                 int coord = 2-(bump >> 1);
1491                 //int coord = (bump >> 1);
1492                 int dir = (bump & 1);
1493                 int subbump;
1494
1495                 for(subbump = 0; ; ++subbump)
1496                 {
1497                         VectorCopy(stuckorigin, testorigin);
1498                         if(dir)
1499                         {
1500                                 // pushing maxs
1501                                 testorigin[coord] += stuckmaxs[coord] - goodmaxs[coord];
1502                         }
1503                         else
1504                         {
1505                                 // pushing mins
1506                                 testorigin[coord] += stuckmins[coord] - goodmins[coord];
1507                         }
1508
1509                         stucktrace = SV_TraceBox(stuckorigin, goodmins, goodmaxs, testorigin, MOVE_NOMONSTERS, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
1510                         if (stucktrace.bmodelstartsolid)
1511                         {
1512                                 // BAD BAD, can't fix that
1513                                 return false;
1514                         }
1515
1516                         if (stucktrace.fraction >= 1)
1517                                 break; // it WORKS!
1518
1519                         if(subbump >= 10)
1520                         {
1521                                 // BAD BAD, can't fix that
1522                                 return false;
1523                         }
1524
1525                         // we hit something... let's move out of it
1526                         VectorSubtract(stucktrace.endpos, testorigin, move);
1527                         nudge = DotProduct(stucktrace.plane.normal, move) + 0.03125f; // FIXME cvar this constant
1528                         VectorMA(stuckorigin, nudge, stucktrace.plane.normal, stuckorigin);
1529                 }
1530                 /*
1531                 if(subbump > 0)
1532                         Con_Printf("subbump: %d\n", subbump);
1533                 */
1534
1535                 if(dir)
1536                 {
1537                         // pushing maxs
1538                         goodmaxs[coord] = stuckmaxs[coord];
1539                 }
1540                 else
1541                 {
1542                         // pushing mins
1543                         goodmins[coord] = stuckmins[coord];
1544                 }
1545         }
1546
1547         // WE WIN
1548         VectorCopy(stuckorigin, PRVM_serveredictvector(ent, origin));
1549
1550         return true;
1551 }
1552
1553 /*
1554 ============
1555 SV_PushEntity
1556
1557 Does not change the entities velocity at all
1558 The trace struct is filled with the trace that has been done.
1559 Returns true if the push did not result in the entity being teleported by QC code.
1560 ============
1561 */
1562 static qbool SV_PushEntity (trace_t *trace, prvm_edict_t *ent, vec3_t push, qbool dolink, qbool checkstuck)
1563 {
1564         prvm_prog_t *prog = SVVM_prog;
1565         int solid;
1566         int movetype;
1567         int type;
1568         vec3_t mins, maxs;
1569         vec3_t start;
1570         vec3_t end;
1571
1572         solid = (int)PRVM_serveredictfloat(ent, solid);
1573         movetype = (int)PRVM_serveredictfloat(ent, movetype);
1574         VectorCopy(PRVM_serveredictvector(ent, mins), mins);
1575         VectorCopy(PRVM_serveredictvector(ent, maxs), maxs);
1576
1577         VectorCopy(PRVM_serveredictvector(ent, origin), start);
1578         VectorAdd(start, push, end);
1579
1580         if (movetype == MOVETYPE_FLYMISSILE)
1581                 type = MOVE_MISSILE;
1582         else if (movetype == MOVETYPE_FLY_WORLDONLY)
1583                 type = MOVE_WORLDONLY;
1584         else if (solid == SOLID_TRIGGER || solid == SOLID_NOT)
1585                 type = MOVE_NOMONSTERS; // only clip against bmodels
1586         else
1587                 type = MOVE_NORMAL;
1588
1589         *trace = SV_TraceBox(start, mins, maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
1590         // abort move if we're stuck in the world (and didn't make it out)
1591         if (trace->worldstartsolid && trace->allsolid && trace->startdepth < 0 && checkstuck)
1592         {
1593                 // checking startdepth eliminates many false positives on Q1BSP with mod_q1bsp_polygoncollisions 0
1594                 // but it's still not guaranteed that we're stuck in a bmodel at this point
1595                 if (sv_gameplayfix_nudgeoutofsolid.integer && sv_gameplayfix_nudgeoutofsolid_separation.value >= 0)
1596                 {
1597                         switch (PHYS_NudgeOutOfSolid(prog, ent))
1598                         {
1599                                 case 0:
1600                                         Con_Printf(CON_WARN "NudgeOutOfSolid couldn't fix stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
1601                                         return true; // definitely stuck in a bmodel
1602                                 case 1:
1603                                         Con_DPrintf("NudgeOutOfSolid fixed stuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), PRVM_serveredictvector(ent, origin)[0] - start[0], PRVM_serveredictvector(ent, origin)[1] - start[1], PRVM_serveredictvector(ent, origin)[2] - start[2]);
1604                                         VectorCopy(PRVM_serveredictvector(ent, origin), start);
1605                                         VectorAdd(start, push, end);
1606                                         *trace = SV_TraceBox(start, mins, maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
1607
1608                                 // definitely not stuck in a bmodel, move may proceed
1609                         }
1610                 }
1611                 else if (sv_gameplayfix_unstickentities.integer && SV_UnstickEntity(ent))
1612                 {
1613                         // bones_was_here: pretty sure we can deprecate sv_gameplayfix_unstickentities, sv_gameplayfix_nudgeoutofsolid is much nicer
1614                         VectorCopy(PRVM_serveredictvector(ent, origin), start);
1615                         VectorAdd(start, push, end);
1616                         *trace = SV_TraceBox(start, mins, maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent), 0, 0, collision_extendmovelength.value);
1617                 }
1618                 else
1619                         return true; // assuming stuck, bones_was_here TODO: always use PHYS_NudgeOutOfSolid (remove sv_gameplayfix_nudgeoutofsolid)?
1620         }
1621
1622         VectorCopy(trace->endpos, PRVM_serveredictvector(ent, origin));
1623
1624         ent->priv.required->mark = PRVM_EDICT_MARK_WAIT_FOR_SETORIGIN; // -2: setorigin running
1625
1626         SV_LinkEdict(ent);
1627
1628 #if 0
1629         if(!trace->startsolid)
1630         if(SV_TraceBox(PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, mins), PRVM_serveredictvector(ent, maxs), PRVM_serveredictvector(ent, origin), type, ent, SV_GenericHitSuperContentsMask(ent), 0).startsolid)
1631         {
1632                 Con_Printf("something eeeeevil happened\n");
1633         }
1634 #endif
1635
1636         if (dolink)
1637         {
1638                 SV_LinkEdict_TouchAreaGrid(ent);
1639
1640                 if((PRVM_serveredictfloat(ent, solid) >= SOLID_TRIGGER && trace->ent && (!((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND) || PRVM_serveredictedict(ent, groundentity) != PRVM_EDICT_TO_PROG(trace->ent))))
1641                         SV_Impact (ent, trace);
1642         }
1643
1644         if(ent->priv.required->mark == PRVM_EDICT_MARK_SETORIGIN_CAUGHT)
1645         {
1646                 ent->priv.required->mark = 0;
1647                 return false;
1648         }
1649         else if(ent->priv.required->mark == PRVM_EDICT_MARK_WAIT_FOR_SETORIGIN)
1650         {
1651                 ent->priv.required->mark = 0;
1652                 return true;
1653         }
1654         else
1655         {
1656                 Con_Printf("The edict mark had been overwritten! Please debug this.\n");
1657                 return true;
1658         }
1659 }
1660
1661
1662 /*
1663 ============
1664 SV_PushMove
1665
1666 ============
1667 */
1668 static void SV_PushMove (prvm_edict_t *pusher, float movetime)
1669 {
1670         prvm_prog_t *prog = SVVM_prog;
1671         int i, e, index;
1672         int pusherowner, pusherprog;
1673         int checkcontents;
1674         qbool rotated;
1675         float savesolid, movetime2, pushltime;
1676         vec3_t mins, maxs, move, move1, moveangle, pushorig, pushang, a, forward, left, up, org, pushermins, pushermaxs, checkorigin, checkmins, checkmaxs;
1677         int num_moved;
1678         int numcheckentities;
1679         static prvm_edict_t *checkentities[MAX_EDICTS];
1680         model_t *pushermodel;
1681         trace_t trace, trace2;
1682         matrix4x4_t pusherfinalmatrix, pusherfinalimatrix;
1683         static unsigned short moved_edicts[MAX_EDICTS];
1684         vec3_t pivot;
1685
1686         if (!PRVM_serveredictvector(pusher, velocity)[0] && !PRVM_serveredictvector(pusher, velocity)[1] && !PRVM_serveredictvector(pusher, velocity)[2] && !PRVM_serveredictvector(pusher, avelocity)[0] && !PRVM_serveredictvector(pusher, avelocity)[1] && !PRVM_serveredictvector(pusher, avelocity)[2])
1687         {
1688                 PRVM_serveredictfloat(pusher, ltime) += movetime;
1689                 return;
1690         }
1691
1692         switch ((int) PRVM_serveredictfloat(pusher, solid))
1693         {
1694         // LadyHavoc: valid pusher types
1695         case SOLID_BSP:
1696         case SOLID_BBOX:
1697         case SOLID_SLIDEBOX:
1698         case SOLID_CORPSE: // LadyHavoc: this would be weird...
1699                 break;
1700         // LadyHavoc: no collisions
1701         case SOLID_NOT:
1702         case SOLID_TRIGGER:
1703                 VectorMA (PRVM_serveredictvector(pusher, origin), movetime, PRVM_serveredictvector(pusher, velocity), PRVM_serveredictvector(pusher, origin));
1704                 VectorMA (PRVM_serveredictvector(pusher, angles), movetime, PRVM_serveredictvector(pusher, avelocity), PRVM_serveredictvector(pusher, angles));
1705                 PRVM_serveredictvector(pusher, angles)[0] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[0] * (1.0 / 360.0));
1706                 PRVM_serveredictvector(pusher, angles)[1] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[1] * (1.0 / 360.0));
1707                 PRVM_serveredictvector(pusher, angles)[2] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[2] * (1.0 / 360.0));
1708                 PRVM_serveredictfloat(pusher, ltime) += movetime;
1709                 SV_LinkEdict(pusher);
1710                 return;
1711         default:
1712                 Con_Printf("SV_PushMove: entity #%i, unrecognized solid type %f\n", PRVM_NUM_FOR_EDICT(pusher), PRVM_serveredictfloat(pusher, solid));
1713                 return;
1714         }
1715         index = (int) PRVM_serveredictfloat(pusher, modelindex);
1716         if (index < 1 || index >= MAX_MODELS)
1717         {
1718                 Con_Printf("SV_PushMove: entity #%i has an invalid modelindex %f\n", PRVM_NUM_FOR_EDICT(pusher), PRVM_serveredictfloat(pusher, modelindex));
1719                 return;
1720         }
1721         pushermodel = SV_GetModelByIndex(index);
1722         pusherowner = PRVM_serveredictedict(pusher, owner);
1723         pusherprog = PRVM_EDICT_TO_PROG(pusher);
1724
1725         rotated = VectorLength2(PRVM_serveredictvector(pusher, angles)) + VectorLength2(PRVM_serveredictvector(pusher, avelocity)) > 0;
1726
1727         movetime2 = movetime;
1728         VectorScale(PRVM_serveredictvector(pusher, velocity), movetime2, move1);
1729         VectorScale(PRVM_serveredictvector(pusher, avelocity), movetime2, moveangle);
1730         if (moveangle[0] || moveangle[2])
1731         {
1732                 for (i = 0;i < 3;i++)
1733                 {
1734                         if (move1[i] > 0)
1735                         {
1736                                 mins[i] = pushermodel->rotatedmins[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1737                                 maxs[i] = pushermodel->rotatedmaxs[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1738                         }
1739                         else
1740                         {
1741                                 mins[i] = pushermodel->rotatedmins[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1742                                 maxs[i] = pushermodel->rotatedmaxs[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1743                         }
1744                 }
1745         }
1746         else if (moveangle[1])
1747         {
1748                 for (i = 0;i < 3;i++)
1749                 {
1750                         if (move1[i] > 0)
1751                         {
1752                                 mins[i] = pushermodel->yawmins[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1753                                 maxs[i] = pushermodel->yawmaxs[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1754                         }
1755                         else
1756                         {
1757                                 mins[i] = pushermodel->yawmins[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1758                                 maxs[i] = pushermodel->yawmaxs[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1759                         }
1760                 }
1761         }
1762         else
1763         {
1764                 for (i = 0;i < 3;i++)
1765                 {
1766                         if (move1[i] > 0)
1767                         {
1768                                 mins[i] = pushermodel->normalmins[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1769                                 maxs[i] = pushermodel->normalmaxs[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1770                         }
1771                         else
1772                         {
1773                                 mins[i] = pushermodel->normalmins[i] + move1[i] + PRVM_serveredictvector(pusher, origin)[i] - 1;
1774                                 maxs[i] = pushermodel->normalmaxs[i] + PRVM_serveredictvector(pusher, origin)[i] + 1;
1775                         }
1776                 }
1777         }
1778
1779         VectorNegate (moveangle, a);
1780         AngleVectorsFLU (a, forward, left, up);
1781
1782         VectorCopy (PRVM_serveredictvector(pusher, origin), pushorig);
1783         VectorCopy (PRVM_serveredictvector(pusher, angles), pushang);
1784         pushltime = PRVM_serveredictfloat(pusher, ltime);
1785
1786 // move the pusher to its final position
1787
1788         VectorMA (PRVM_serveredictvector(pusher, origin), movetime, PRVM_serveredictvector(pusher, velocity), PRVM_serveredictvector(pusher, origin));
1789         VectorMA (PRVM_serveredictvector(pusher, angles), movetime, PRVM_serveredictvector(pusher, avelocity), PRVM_serveredictvector(pusher, angles));
1790         PRVM_serveredictfloat(pusher, ltime) += movetime;
1791         SV_LinkEdict(pusher);
1792
1793         pushermodel = SV_GetModelFromEdict(pusher);
1794         Matrix4x4_CreateFromQuakeEntity(&pusherfinalmatrix, PRVM_serveredictvector(pusher, origin)[0], PRVM_serveredictvector(pusher, origin)[1], PRVM_serveredictvector(pusher, origin)[2], PRVM_serveredictvector(pusher, angles)[0], PRVM_serveredictvector(pusher, angles)[1], PRVM_serveredictvector(pusher, angles)[2], 1);
1795         Matrix4x4_Invert_Simple(&pusherfinalimatrix, &pusherfinalmatrix);
1796
1797         savesolid = PRVM_serveredictfloat(pusher, solid);
1798
1799 // see if any solid entities are inside the final position
1800         num_moved = 0;
1801
1802         if (PRVM_serveredictfloat(pusher, movetype) == MOVETYPE_FAKEPUSH) // Tenebrae's MOVETYPE_PUSH variant that doesn't push...
1803                 numcheckentities = 0;
1804         else // MOVETYPE_PUSH
1805                 numcheckentities = SV_EntitiesInBox(mins, maxs, MAX_EDICTS, checkentities);
1806         for (e = 0;e < numcheckentities;e++)
1807         {
1808                 prvm_edict_t *check = checkentities[e];
1809                 int movetype = (int)PRVM_serveredictfloat(check, movetype);
1810                 switch(movetype)
1811                 {
1812                 case MOVETYPE_NONE:
1813                 case MOVETYPE_PUSH:
1814                 case MOVETYPE_FOLLOW:
1815                 case MOVETYPE_NOCLIP:
1816                 case MOVETYPE_FLY_WORLDONLY:
1817                         continue;
1818                 default:
1819                         break;
1820                 }
1821
1822                 if (PRVM_serveredictedict(check, owner) == pusherprog)
1823                         continue;
1824
1825                 if (pusherowner == PRVM_EDICT_TO_PROG(check))
1826                         continue;
1827
1828                 //Con_Printf("%i %s ", PRVM_NUM_FOR_EDICT(check), PRVM_GetString(PRVM_serveredictstring(check, classname)));
1829
1830                 // tell any MOVETYPE_STEP entity that it may need to check for water transitions
1831                 check->priv.server->waterposition_forceupdate = true;
1832
1833                 checkcontents = SV_GenericHitSuperContentsMask(check);
1834
1835                 // if the entity is standing on the pusher, it will definitely be moved
1836                 // if the entity is not standing on the pusher, but is in the pusher's
1837                 // final position, move it
1838                 if (!((int)PRVM_serveredictfloat(check, flags) & FL_ONGROUND) || PRVM_PROG_TO_EDICT(PRVM_serveredictedict(check, groundentity)) != pusher)
1839                 {
1840                         VectorCopy(PRVM_serveredictvector(pusher, mins), pushermins);
1841                         VectorCopy(PRVM_serveredictvector(pusher, maxs), pushermaxs);
1842                         VectorCopy(PRVM_serveredictvector(check, origin), checkorigin);
1843                         VectorCopy(PRVM_serveredictvector(check, mins), checkmins);
1844                         VectorCopy(PRVM_serveredictvector(check, maxs), checkmaxs);
1845                         Collision_ClipToGenericEntity(&trace, pushermodel, pusher->priv.server->frameblend, &pusher->priv.server->skeleton, pushermins, pushermaxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, checkorigin, checkmins, checkmaxs, checkorigin, checkcontents, 0, 0, collision_extendmovelength.value);
1846                         //trace = SV_TraceBox(PRVM_serveredictvector(check, origin), PRVM_serveredictvector(check, mins), PRVM_serveredictvector(check, maxs), PRVM_serveredictvector(check, origin), MOVE_NOMONSTERS, check, checkcontents);
1847                         if (!trace.startsolid)
1848                         {
1849                                 //Con_Printf("- not in solid\n");
1850                                 continue;
1851                         }
1852                 }
1853
1854                 VectorLerp(PRVM_serveredictvector(check, mins), 0.5f, PRVM_serveredictvector(check, maxs), pivot);
1855                 //VectorClear(pivot);
1856
1857                 if (rotated)
1858                 {
1859                         vec3_t org2;
1860                         VectorSubtract (PRVM_serveredictvector(check, origin), PRVM_serveredictvector(pusher, origin), org);
1861                         VectorAdd (org, pivot, org);
1862                         org2[0] = DotProduct (org, forward);
1863                         org2[1] = DotProduct (org, left);
1864                         org2[2] = DotProduct (org, up);
1865                         VectorSubtract (org2, org, move);
1866                         VectorAdd (move, move1, move);
1867                 }
1868                 else
1869                         VectorCopy (move1, move);
1870
1871                 //Con_Printf("- pushing %f %f %f\n", move[0], move[1], move[2]);
1872
1873                 VectorCopy (PRVM_serveredictvector(check, origin), check->priv.server->moved_from);
1874                 VectorCopy (PRVM_serveredictvector(check, angles), check->priv.server->moved_fromangles);
1875                 moved_edicts[num_moved++] = PRVM_NUM_FOR_EDICT(check);
1876
1877                 // physics objects need better collisions than this code can do
1878                 if (movetype == MOVETYPE_PHYSICS)
1879                 {
1880                         VectorAdd(PRVM_serveredictvector(check, origin), move, PRVM_serveredictvector(check, origin));
1881                         SV_LinkEdict(check);
1882                         SV_LinkEdict_TouchAreaGrid(check);
1883                         continue;
1884                 }
1885
1886                 // try moving the contacted entity
1887                 PRVM_serveredictfloat(pusher, solid) = SOLID_NOT;
1888                 if(!SV_PushEntity(&trace, check, move, true, true))
1889                 {
1890                         // entity "check" got teleported
1891                         PRVM_serveredictvector(check, angles)[1] += trace.fraction * moveangle[1];
1892                         PRVM_serveredictfloat(pusher, solid) = savesolid; // was SOLID_BSP
1893                         continue; // pushed enough
1894                 }
1895                 // FIXME: turn players specially
1896                 PRVM_serveredictvector(check, angles)[1] += trace.fraction * moveangle[1];
1897                 PRVM_serveredictfloat(pusher, solid) = savesolid; // was SOLID_BSP
1898                 //Con_Printf("%s:%d frac %f startsolid %d bmodelstartsolid %d allsolid %d\n", __FILE__, __LINE__, trace.fraction, trace.startsolid, trace.bmodelstartsolid, trace.allsolid);
1899
1900                 // this trace.fraction < 1 check causes items to fall off of pushers
1901                 // if they pass under or through a wall
1902                 // the groundentity check causes items to fall off of ledges
1903                 if (PRVM_serveredictfloat(check, movetype) != MOVETYPE_WALK && (trace.fraction < 1 || PRVM_PROG_TO_EDICT(PRVM_serveredictedict(check, groundentity)) != pusher))
1904                         PRVM_serveredictfloat(check, flags) = (int)PRVM_serveredictfloat(check, flags) & ~FL_ONGROUND;
1905
1906                 // if it is still inside the pusher, block
1907                 VectorCopy(PRVM_serveredictvector(pusher, mins), pushermins);
1908                 VectorCopy(PRVM_serveredictvector(pusher, maxs), pushermaxs);
1909                 VectorCopy(PRVM_serveredictvector(check, origin), checkorigin);
1910                 VectorCopy(PRVM_serveredictvector(check, mins), checkmins);
1911                 VectorCopy(PRVM_serveredictvector(check, maxs), checkmaxs);
1912                 Collision_ClipToGenericEntity(&trace, pushermodel, pusher->priv.server->frameblend, &pusher->priv.server->skeleton, pushermins, pushermaxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, checkorigin, checkmins, checkmaxs, checkorigin, checkcontents, 0, 0, collision_extendmovelength.value);
1913                 if (trace.startsolid)
1914                 {
1915                         vec3_t move2;
1916                         if(SV_NudgeOutOfSolid_PivotIsKnownGood(check, pivot))
1917                         {
1918                                 // hack to invoke all necessary movement triggers
1919                                 VectorClear(move2);
1920                                 if(!SV_PushEntity(&trace2, check, move2, true, true))
1921                                 {
1922                                         // entity "check" got teleported
1923                                         continue;
1924                                 }
1925                                 // we could fix it
1926                                 continue;
1927                         }
1928
1929                         // still inside pusher, so it's really blocked
1930
1931                         // fail the move
1932                         if (PRVM_serveredictvector(check, mins)[0] == PRVM_serveredictvector(check, maxs)[0])
1933                                 continue;
1934                         if (PRVM_serveredictfloat(check, solid) == SOLID_NOT || PRVM_serveredictfloat(check, solid) == SOLID_TRIGGER)
1935                         {
1936                                 // corpse
1937                                 PRVM_serveredictvector(check, mins)[0] = PRVM_serveredictvector(check, mins)[1] = 0;
1938                                 VectorCopy (PRVM_serveredictvector(check, mins), PRVM_serveredictvector(check, maxs));
1939                                 continue;
1940                         }
1941
1942                         VectorCopy (pushorig, PRVM_serveredictvector(pusher, origin));
1943                         VectorCopy (pushang, PRVM_serveredictvector(pusher, angles));
1944                         PRVM_serveredictfloat(pusher, ltime) = pushltime;
1945                         SV_LinkEdict(pusher);
1946
1947                         // move back any entities we already moved
1948                         for (i = 0;i < num_moved;i++)
1949                         {
1950                                 prvm_edict_t *ed = PRVM_EDICT_NUM(moved_edicts[i]);
1951                                 VectorCopy (ed->priv.server->moved_from, PRVM_serveredictvector(ed, origin));
1952                                 VectorCopy (ed->priv.server->moved_fromangles, PRVM_serveredictvector(ed, angles));
1953                                 SV_LinkEdict(ed);
1954                         }
1955
1956                         // if the pusher has a "blocked" function, call it, otherwise just stay in place until the obstacle is gone
1957                         if (PRVM_serveredictfunction(pusher, blocked))
1958                         {
1959                                 PRVM_serverglobalfloat(time) = sv.time;
1960                                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(pusher);
1961                                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(check);
1962                                 prog->ExecuteProgram(prog, PRVM_serveredictfunction(pusher, blocked), "QC function self.blocked is missing");
1963                         }
1964                         break;
1965                 }
1966         }
1967         PRVM_serveredictvector(pusher, angles)[0] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[0] * (1.0 / 360.0));
1968         PRVM_serveredictvector(pusher, angles)[1] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[1] * (1.0 / 360.0));
1969         PRVM_serveredictvector(pusher, angles)[2] -= 360.0 * floor(PRVM_serveredictvector(pusher, angles)[2] * (1.0 / 360.0));
1970 }
1971
1972 /*
1973 ================
1974 SV_Physics_Pusher
1975
1976 ================
1977 */
1978 static void SV_Physics_Pusher (prvm_edict_t *ent)
1979 {
1980         prvm_prog_t *prog = SVVM_prog;
1981         prvm_vec_t thinktime, oldltime, movetime;
1982
1983         oldltime = PRVM_serveredictfloat(ent, ltime);
1984
1985         thinktime = PRVM_serveredictfloat(ent, nextthink);
1986         if (thinktime < PRVM_serveredictfloat(ent, ltime) + sv.frametime)
1987         {
1988                 movetime = thinktime - PRVM_serveredictfloat(ent, ltime);
1989                 if (movetime < 0)
1990                         movetime = 0;
1991         }
1992         else
1993                 movetime = sv.frametime;
1994
1995         if (movetime)
1996                 // advances PRVM_serveredictfloat(ent, ltime) if not blocked
1997                 SV_PushMove (ent, movetime);
1998
1999         if (thinktime > oldltime && thinktime <= PRVM_serveredictfloat(ent, ltime))
2000         {
2001                 PRVM_serveredictfloat(ent, nextthink) = 0;
2002                 PRVM_serverglobalfloat(time) = sv.time;
2003                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
2004                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(prog->edicts);
2005                 prog->ExecuteProgram(prog, PRVM_serveredictfunction(ent, think), "QC function self.think is missing");
2006         }
2007 }
2008
2009
2010 /*
2011 ===============================================================================
2012
2013 CLIENT MOVEMENT
2014
2015 ===============================================================================
2016 */
2017
2018 static float unstickoffsets[] =
2019 {
2020         // poutting -/+z changes first as they are least weird
2021          0,  0,  -1,
2022          0,  0,  1,
2023          // x or y changes
2024         -1,  0,  0,
2025          1,  0,  0,
2026          0, -1,  0,
2027          0,  1,  0,
2028          // x and y changes
2029         -1, -1,  0,
2030          1, -1,  0,
2031         -1,  1,  0,
2032          1,  1,  0,
2033 };
2034
2035 typedef enum unstickresult_e
2036 {
2037         UNSTICK_STUCK = 0,
2038         UNSTICK_GOOD = 1,
2039         UNSTICK_UNSTUCK = 2
2040 }
2041 unstickresult_t;
2042
2043 static unstickresult_t SV_UnstickEntityReturnOffset (prvm_edict_t *ent, vec3_t offset)
2044 {
2045         prvm_prog_t *prog = SVVM_prog;
2046         int i, maxunstick;
2047
2048         // if not stuck in a bmodel, just return
2049         if (!SV_TestEntityPosition(ent, vec3_origin))
2050                 return UNSTICK_GOOD;
2051
2052         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
2053         {
2054                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
2055                 {
2056                         VectorCopy(unstickoffsets + i, offset);
2057                         SV_LinkEdict(ent);
2058                         //SV_LinkEdict_TouchAreaGrid(ent);
2059                         return UNSTICK_UNSTUCK;
2060                 }
2061         }
2062
2063         maxunstick = (int) ((PRVM_serveredictvector(ent, maxs)[2] - PRVM_serveredictvector(ent, mins)[2]) * 0.36);
2064         // magic number 0.36 allows unsticking by up to 17 units with the largest supported bbox
2065
2066         for(i = 2; i <= maxunstick; ++i)
2067         {
2068                 VectorClear(offset);
2069                 offset[2] = -i;
2070                 if (!SV_TestEntityPosition(ent, offset))
2071                 {
2072                         SV_LinkEdict(ent);
2073                         //SV_LinkEdict_TouchAreaGrid(ent);
2074                         return UNSTICK_UNSTUCK;
2075                 }
2076                 offset[2] = i;
2077                 if (!SV_TestEntityPosition(ent, offset))
2078                 {
2079                         SV_LinkEdict(ent);
2080                         //SV_LinkEdict_TouchAreaGrid(ent);
2081                         return UNSTICK_UNSTUCK;
2082                 }
2083         }
2084
2085         return UNSTICK_STUCK;
2086 }
2087
2088 qbool SV_UnstickEntity (prvm_edict_t *ent)
2089 {
2090         prvm_prog_t *prog = SVVM_prog;
2091         vec3_t offset;
2092         switch(SV_UnstickEntityReturnOffset(ent, offset))
2093         {
2094                 case UNSTICK_GOOD:
2095                         return true;
2096                 case UNSTICK_UNSTUCK:
2097                         Con_DPrintf("Unstuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
2098                         return true;
2099                 case UNSTICK_STUCK:
2100                         if (developer_extra.integer)
2101                                 Con_DPrintf("Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
2102                         return false;
2103                 default:
2104                         Con_Printf("SV_UnstickEntityReturnOffset returned a value outside its enum.\n");
2105                         return false;
2106         }
2107 }
2108
2109 /*
2110 =============
2111 SV_CheckStuck
2112
2113 This is a big hack to try and fix the rare case of getting stuck in the world
2114 clipping hull.
2115 =============
2116 */
2117 static void SV_CheckStuck (prvm_edict_t *ent)
2118 {
2119         prvm_prog_t *prog = SVVM_prog;
2120         vec3_t offset;
2121
2122         switch(SV_UnstickEntityReturnOffset(ent, offset))
2123         {
2124                 case UNSTICK_GOOD:
2125                         VectorCopy (PRVM_serveredictvector(ent, origin), PRVM_serveredictvector(ent, oldorigin));
2126                         break;
2127                 case UNSTICK_UNSTUCK:
2128                         Con_DPrintf("Unstuck player entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)), offset[0], offset[1], offset[2]);
2129                         break;
2130                 case UNSTICK_STUCK:
2131                         VectorSubtract(PRVM_serveredictvector(ent, oldorigin), PRVM_serveredictvector(ent, origin), offset);
2132                         if (!SV_TestEntityPosition(ent, offset))
2133                         {
2134                                 Con_DPrintf("Unstuck player entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
2135                                 SV_LinkEdict(ent);
2136                                 //SV_LinkEdict_TouchAreaGrid(ent);
2137                         }
2138                         else
2139                                 Con_DPrintf("Stuck player entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(prog, PRVM_serveredictstring(ent, classname)));
2140                         break;
2141                 default:
2142                         Con_Printf("SV_UnstickEntityReturnOffset returned a value outside its enum.\n");
2143         }
2144 }
2145
2146
2147 /*
2148 =============
2149 SV_CheckWater
2150 =============
2151 */
2152 static qbool SV_CheckWater (prvm_edict_t *ent)
2153 {
2154         prvm_prog_t *prog = SVVM_prog;
2155         int cont;
2156         int nNativeContents;
2157         vec3_t point;
2158
2159         point[0] = PRVM_serveredictvector(ent, origin)[0];
2160         point[1] = PRVM_serveredictvector(ent, origin)[1];
2161         point[2] = PRVM_serveredictvector(ent, origin)[2] + PRVM_serveredictvector(ent, mins)[2] + 1;
2162
2163         // DRESK - Support for Entity Contents Transition Event
2164         // NOTE: Some logic needed to be slightly re-ordered
2165         // to not affect performance and allow for the feature.
2166
2167         // Acquire Super Contents Prior to Resets
2168         cont = SV_PointSuperContents(point);
2169         // Acquire Native Contents Here
2170         nNativeContents = Mod_Q1BSP_NativeContentsFromSuperContents(cont);
2171
2172         // DRESK - Support for Entity Contents Transition Event
2173         if(PRVM_serveredictfloat(ent, watertype))
2174                 // Entity did NOT Spawn; Check
2175                 SV_CheckContentsTransition(ent, nNativeContents);
2176
2177
2178         PRVM_serveredictfloat(ent, waterlevel) = 0;
2179         PRVM_serveredictfloat(ent, watertype) = CONTENTS_EMPTY;
2180         cont = SV_PointSuperContents(point);
2181         if (cont & (SUPERCONTENTS_LIQUIDSMASK))
2182         {
2183                 PRVM_serveredictfloat(ent, watertype) = nNativeContents;
2184                 PRVM_serveredictfloat(ent, waterlevel) = 1;
2185                 point[2] = PRVM_serveredictvector(ent, origin)[2] + (PRVM_serveredictvector(ent, mins)[2] + PRVM_serveredictvector(ent, maxs)[2])*0.5;
2186                 if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
2187                 {
2188                         PRVM_serveredictfloat(ent, waterlevel) = 2;
2189                         point[2] = PRVM_serveredictvector(ent, origin)[2] + PRVM_serveredictvector(ent, view_ofs)[2];
2190                         if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
2191                                 PRVM_serveredictfloat(ent, waterlevel) = 3;
2192                 }
2193         }
2194
2195         return PRVM_serveredictfloat(ent, waterlevel) > 1;
2196 }
2197
2198 /*
2199 ============
2200 SV_WallFriction
2201
2202 ============
2203 */
2204 static void SV_WallFriction (prvm_edict_t *ent, float *stepnormal)
2205 {
2206         prvm_prog_t *prog = SVVM_prog;
2207         float d, i;
2208         vec3_t forward, into, side, v_angle;
2209
2210         VectorCopy(PRVM_serveredictvector(ent, v_angle), v_angle);
2211         AngleVectors (v_angle, forward, NULL, NULL);
2212         if ((d = DotProduct (stepnormal, forward) + 0.5) < 0)
2213         {
2214                 // cut the tangential velocity
2215                 i = DotProduct (stepnormal, PRVM_serveredictvector(ent, velocity));
2216                 VectorScale (stepnormal, i, into);
2217                 VectorSubtract (PRVM_serveredictvector(ent, velocity), into, side);
2218                 PRVM_serveredictvector(ent, velocity)[0] = side[0] * (1 + d);
2219                 PRVM_serveredictvector(ent, velocity)[1] = side[1] * (1 + d);
2220         }
2221 }
2222
2223 #if 0
2224 /*
2225 =====================
2226 SV_TryUnstick
2227
2228 Player has come to a dead stop, possibly due to the problem with limited
2229 float precision at some angle joins in the BSP hull.
2230
2231 Try fixing by pushing one pixel in each direction.
2232
2233 This is a hack, but in the interest of good gameplay...
2234 ======================
2235 */
2236 int SV_TryUnstick (prvm_edict_t *ent, vec3_t oldvel)
2237 {
2238         int i, clip;
2239         vec3_t oldorg, dir;
2240
2241         VectorCopy (PRVM_serveredictvector(ent, origin), oldorg);
2242         VectorClear (dir);
2243
2244         for (i=0 ; i<8 ; i++)
2245         {
2246                 // try pushing a little in an axial direction
2247                 switch (i)
2248                 {
2249                         case 0: dir[0] = 2; dir[1] = 0; break;
2250                         case 1: dir[0] = 0; dir[1] = 2; break;
2251                         case 2: dir[0] = -2; dir[1] = 0; break;
2252                         case 3: dir[0] = 0; dir[1] = -2; break;
2253                         case 4: dir[0] = 2; dir[1] = 2; break;
2254                         case 5: dir[0] = -2; dir[1] = 2; break;
2255                         case 6: dir[0] = 2; dir[1] = -2; break;
2256                         case 7: dir[0] = -2; dir[1] = -2; break;
2257                 }
2258
2259                 SV_PushEntity (&trace, ent, dir, false, true);
2260
2261                 // retry the original move
2262                 PRVM_serveredictvector(ent, velocity)[0] = oldvel[0];
2263                 PRVM_serveredictvector(ent, velocity)[1] = oldvel[1];
2264                 PRVM_serveredictvector(ent, velocity)[2] = 0;
2265                 clip = SV_FlyMove (ent, 0.1, NULL, SV_GenericHitSuperContentsMask(ent), 0);
2266
2267                 if (fabs(oldorg[1] - PRVM_serveredictvector(ent, origin)[1]) > 4
2268                  || fabs(oldorg[0] - PRVM_serveredictvector(ent, origin)[0]) > 4)
2269                 {
2270                         Con_DPrint("TryUnstick - success.\n");
2271                         return clip;
2272                 }
2273
2274                 // go back to the original pos and try again
2275                 VectorCopy (oldorg, PRVM_serveredictvector(ent, origin));
2276         }
2277
2278         // still not moving
2279         VectorClear (PRVM_serveredictvector(ent, velocity));
2280         Con_DPrint("TryUnstick - failure.\n");
2281         return 7;
2282 }
2283 #endif
2284
2285 /*
2286 =====================
2287 SV_WalkMove
2288
2289 Only used by players
2290 ======================
2291 */
2292 static void SV_WalkMove (prvm_edict_t *ent)
2293 {
2294         prvm_prog_t *prog = SVVM_prog;
2295         int clip;
2296         int oldonground;
2297         //int originalmove_clip;
2298         int originalmove_flags;
2299         int originalmove_groundentity;
2300         int hitsupercontentsmask = SV_GenericHitSuperContentsMask(ent);
2301         int skipsupercontentsmask = 0;
2302         int skipmaterialflagsmask = 0;
2303         int type;
2304         vec3_t upmove, downmove, start_origin, start_velocity, stepnormal, originalmove_origin, originalmove_velocity, entmins, entmaxs;
2305         trace_t downtrace, trace;
2306         qbool applygravity;
2307
2308         // if frametime is 0 (due to client sending the same timestamp twice),
2309         // don't move
2310         if (sv.frametime <= 0)
2311                 return;
2312
2313         if (sv_gameplayfix_unstickplayers.integer)
2314                 SV_CheckStuck (ent);
2315
2316         applygravity = !SV_CheckWater (ent) && PRVM_serveredictfloat(ent, movetype) == MOVETYPE_WALK && ! ((int)PRVM_serveredictfloat(ent, flags) & FL_WATERJUMP);
2317
2318         SV_CheckVelocity(ent);
2319
2320         // do a regular slide move unless it looks like you ran into a step
2321         oldonground = (int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND;
2322
2323         VectorCopy (PRVM_serveredictvector(ent, origin), start_origin);
2324         VectorCopy (PRVM_serveredictvector(ent, velocity), start_velocity);
2325
2326         clip = SV_FlyMove (ent, sv.frametime, applygravity, NULL, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, sv_gameplayfix_stepmultipletimes.integer ? sv_stepheight.value : 0);
2327
2328         if(sv_gameplayfix_downtracesupportsongroundflag.integer)
2329         if(!(clip & 1))
2330         {
2331                 // only try this if there was no floor in the way in the trace (no,
2332                 // this check seems to be not REALLY necessary, because if clip & 1,
2333                 // our trace will hit that thing too)
2334                 VectorSet(upmove, PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2] + 1);
2335                 VectorSet(downmove, PRVM_serveredictvector(ent, origin)[0], PRVM_serveredictvector(ent, origin)[1], PRVM_serveredictvector(ent, origin)[2] - 1);
2336                 if (PRVM_serveredictfloat(ent, movetype) == MOVETYPE_FLYMISSILE)
2337                         type = MOVE_MISSILE;
2338                 else if (PRVM_serveredictfloat(ent, movetype) == MOVETYPE_FLY_WORLDONLY)
2339                         type = MOVE_WORLDONLY;
2340                 else if (PRVM_serveredictfloat(ent, solid) == SOLID_TRIGGER || PRVM_serveredictfloat(ent, solid) == SOLID_NOT)
2341                         type = MOVE_NOMONSTERS; // only clip against bmodels
2342                 else
2343                         type = MOVE_NORMAL;
2344                 VectorCopy(PRVM_serveredictvector(ent, mins), entmins);
2345                 VectorCopy(PRVM_serveredictvector(ent, maxs), entmaxs);
2346                 trace = SV_TraceBox(upmove, entmins, entmaxs, downmove, type, ent, SV_GenericHitSuperContentsMask(ent), skipsupercontentsmask, skipmaterialflagsmask, collision_extendmovelength.value);
2347                 if(trace.fraction < 1 && trace.plane.normal[2] > 0.7)
2348                 {
2349                         clip |= 1; // but we HAVE found a floor
2350                         // set groundentity so we get carried when walking onto a mover with sv_gameplayfix_nogravityonground
2351                         PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(trace.ent);
2352                 }
2353         }
2354
2355         // if the move did not hit the ground at any point, we're not on ground
2356         if(!(clip & 1))
2357                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) & ~FL_ONGROUND;
2358
2359         SV_CheckVelocity(ent);
2360         SV_LinkEdict(ent);
2361         SV_LinkEdict_TouchAreaGrid(ent);
2362
2363         if(clip & 8) // teleport
2364                 return;
2365
2366         if ((int)PRVM_serveredictfloat(ent, flags) & FL_WATERJUMP)
2367                 return;
2368
2369         if (sv_nostep.integer)
2370                 return;
2371
2372         VectorCopy(PRVM_serveredictvector(ent, origin), originalmove_origin);
2373         VectorCopy(PRVM_serveredictvector(ent, velocity), originalmove_velocity);
2374         //originalmove_clip = clip;
2375         originalmove_flags = (int)PRVM_serveredictfloat(ent, flags);
2376         originalmove_groundentity = PRVM_serveredictedict(ent, groundentity);
2377
2378         // if move didn't block on a step, return
2379         if (clip & 2)
2380         {
2381                 // if move was not trying to move into the step, return
2382                 if (fabs(start_velocity[0]) < 0.03125 && fabs(start_velocity[1]) < 0.03125)
2383                         return;
2384
2385                 if (PRVM_serveredictfloat(ent, movetype) != MOVETYPE_FLY)
2386                 {
2387                         // return if gibbed by a trigger
2388                         if (PRVM_serveredictfloat(ent, movetype) != MOVETYPE_WALK)
2389                                 return;
2390
2391                         // return if attempting to jump while airborn (unless sv_jumpstep)
2392                         if (!sv_jumpstep.integer)
2393                                 if (!oldonground && PRVM_serveredictfloat(ent, waterlevel) == 0)
2394                                         return;
2395                 }
2396
2397                 // try moving up and forward to go up a step
2398                 // back to start pos
2399                 VectorCopy (start_origin, PRVM_serveredictvector(ent, origin));
2400                 VectorCopy (start_velocity, PRVM_serveredictvector(ent, velocity));
2401
2402                 // move up
2403                 VectorClear (upmove);
2404                 upmove[2] = sv_stepheight.value;
2405                 if(!SV_PushEntity(&trace, ent, upmove, true, true))
2406                 {
2407                         // we got teleported when upstepping... must abort the move
2408                         return;
2409                 }
2410
2411                 // move forward
2412                 PRVM_serveredictvector(ent, velocity)[2] = 0;
2413                 clip = SV_FlyMove (ent, sv.frametime, applygravity, stepnormal, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, 0);
2414                 PRVM_serveredictvector(ent, velocity)[2] += start_velocity[2];
2415                 if(clip & 8)
2416                 {
2417                         // we got teleported when upstepping... must abort the move
2418                         // note that z velocity handling may not be what QC expects here, but we cannot help it
2419                         return;
2420                 }
2421
2422                 SV_CheckVelocity(ent);
2423                 SV_LinkEdict(ent);
2424                 SV_LinkEdict_TouchAreaGrid(ent);
2425
2426                 // check for stuckness, possibly due to the limited precision of floats
2427                 // in the clipping hulls
2428                 if (clip
2429                  && fabs(originalmove_origin[1] - PRVM_serveredictvector(ent, origin)[1]) < 0.03125
2430                  && fabs(originalmove_origin[0] - PRVM_serveredictvector(ent, origin)[0]) < 0.03125)
2431                 {
2432                         //Con_Printf("wall\n");
2433                         // stepping up didn't make any progress, revert to original move
2434                         VectorCopy(originalmove_origin, PRVM_serveredictvector(ent, origin));
2435                         VectorCopy(originalmove_velocity, PRVM_serveredictvector(ent, velocity));
2436                         //clip = originalmove_clip;
2437                         PRVM_serveredictfloat(ent, flags) = originalmove_flags;
2438                         PRVM_serveredictedict(ent, groundentity) = originalmove_groundentity;
2439                         // now try to unstick if needed
2440                         //clip = SV_TryUnstick (ent, oldvel);
2441                         return;
2442                 }
2443
2444                 //Con_Printf("step - ");
2445
2446                 // extra friction based on view angle
2447                 if (clip & 2 && sv_wallfriction.integer)
2448                         SV_WallFriction (ent, stepnormal);
2449         }
2450         // don't do the down move if stepdown is disabled, moving upward, not in water, or the move started offground or ended onground
2451         else if (!sv_gameplayfix_stepdown.integer || PRVM_serveredictfloat(ent, waterlevel) >= 3 || start_velocity[2] >= (1.0 / 32.0) || !oldonground || ((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND))
2452                 return;
2453
2454         // move down
2455         VectorClear (downmove);
2456         downmove[2] = -sv_stepheight.value + start_velocity[2]*sv.frametime;
2457         if(!SV_PushEntity(&downtrace, ent, downmove, true, true))
2458         {
2459                 // we got teleported when downstepping... must abort the move
2460                 return;
2461         }
2462
2463         if (downtrace.fraction < 1 && downtrace.plane.normal[2] > 0.7)
2464         {
2465                 // this has been disabled so that you can't jump when you are stepping
2466                 // up while already jumping (also known as the Quake2 double jump bug)
2467 #if 0
2468                 // LadyHavoc: disabled this check so you can walk on monsters/players
2469                 //if (PRVM_serveredictfloat(ent, solid) == SOLID_BSP)
2470                 {
2471                         //Con_Printf("onground\n");
2472                         PRVM_serveredictfloat(ent, flags) =     (int)PRVM_serveredictfloat(ent, flags) | FL_ONGROUND;
2473                         PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(downtrace.ent);
2474                 }
2475 #endif
2476         }
2477         else
2478         {
2479                 //Con_Printf("slope\n");
2480                 // if the push down didn't end up on good ground, use the move without
2481                 // the step up.  This happens near wall / slope combinations, and can
2482                 // cause the player to hop up higher on a slope too steep to climb
2483                 VectorCopy(originalmove_origin, PRVM_serveredictvector(ent, origin));
2484                 VectorCopy(originalmove_velocity, PRVM_serveredictvector(ent, velocity));
2485                 //clip = originalmove_clip;
2486                 PRVM_serveredictfloat(ent, flags) = originalmove_flags;
2487                 PRVM_serveredictedict(ent, groundentity) = originalmove_groundentity;
2488         }
2489
2490         SV_CheckVelocity(ent);
2491         SV_LinkEdict(ent);
2492         SV_LinkEdict_TouchAreaGrid(ent);
2493 }
2494
2495 //============================================================================
2496
2497 /*
2498 =============
2499 SV_Physics_Follow
2500
2501 Entities that are "stuck" to another entity
2502 =============
2503 */
2504 static void SV_Physics_Follow (prvm_edict_t *ent)
2505 {
2506         prvm_prog_t *prog = SVVM_prog;
2507         vec3_t vf, vr, vu, angles, v;
2508         prvm_edict_t *e;
2509
2510         // LadyHavoc: implemented rotation on MOVETYPE_FOLLOW objects
2511         e = PRVM_PROG_TO_EDICT(PRVM_serveredictedict(ent, aiment));
2512         if (PRVM_serveredictvector(e, angles)[0] == PRVM_serveredictvector(ent, punchangle)[0] && PRVM_serveredictvector(e, angles)[1] == PRVM_serveredictvector(ent, punchangle)[1] && PRVM_serveredictvector(e, angles)[2] == PRVM_serveredictvector(ent, punchangle)[2])
2513         {
2514                 // quick case for no rotation
2515                 VectorAdd(PRVM_serveredictvector(e, origin), PRVM_serveredictvector(ent, view_ofs), PRVM_serveredictvector(ent, origin));
2516         }
2517         else
2518         {
2519                 angles[0] = -PRVM_serveredictvector(ent, punchangle)[0];
2520                 angles[1] =  PRVM_serveredictvector(ent, punchangle)[1];
2521                 angles[2] =  PRVM_serveredictvector(ent, punchangle)[2];
2522                 AngleVectors (angles, vf, vr, vu);
2523                 v[0] = PRVM_serveredictvector(ent, view_ofs)[0] * vf[0] + PRVM_serveredictvector(ent, view_ofs)[1] * vr[0] + PRVM_serveredictvector(ent, view_ofs)[2] * vu[0];
2524                 v[1] = PRVM_serveredictvector(ent, view_ofs)[0] * vf[1] + PRVM_serveredictvector(ent, view_ofs)[1] * vr[1] + PRVM_serveredictvector(ent, view_ofs)[2] * vu[1];
2525                 v[2] = PRVM_serveredictvector(ent, view_ofs)[0] * vf[2] + PRVM_serveredictvector(ent, view_ofs)[1] * vr[2] + PRVM_serveredictvector(ent, view_ofs)[2] * vu[2];
2526                 angles[0] = -PRVM_serveredictvector(e, angles)[0];
2527                 angles[1] =  PRVM_serveredictvector(e, angles)[1];
2528                 angles[2] =  PRVM_serveredictvector(e, angles)[2];
2529                 AngleVectors (angles, vf, vr, vu);
2530                 PRVM_serveredictvector(ent, origin)[0] = v[0] * vf[0] + v[1] * vf[1] + v[2] * vf[2] + PRVM_serveredictvector(e, origin)[0];
2531                 PRVM_serveredictvector(ent, origin)[1] = v[0] * vr[0] + v[1] * vr[1] + v[2] * vr[2] + PRVM_serveredictvector(e, origin)[1];
2532                 PRVM_serveredictvector(ent, origin)[2] = v[0] * vu[0] + v[1] * vu[1] + v[2] * vu[2] + PRVM_serveredictvector(e, origin)[2];
2533         }
2534         VectorAdd (PRVM_serveredictvector(e, angles), PRVM_serveredictvector(ent, v_angle), PRVM_serveredictvector(ent, angles));
2535         SV_LinkEdict(ent);
2536         //SV_LinkEdict_TouchAreaGrid(ent);
2537 }
2538
2539 /*
2540 ==============================================================================
2541
2542 TOSS / BOUNCE
2543
2544 ==============================================================================
2545 */
2546
2547 /*
2548 =============
2549 SV_CheckWaterTransition
2550
2551 =============
2552 */
2553 static void SV_CheckWaterTransition (prvm_edict_t *ent)
2554 {
2555         vec3_t entorigin;
2556         prvm_prog_t *prog = SVVM_prog;
2557         // LadyHavoc: bugfixes in this function are keyed to the sv_gameplayfix_bugfixedcheckwatertransition cvar - if this cvar is 0 then all the original bugs should be reenabled for compatibility
2558         int cont;
2559         VectorCopy(PRVM_serveredictvector(ent, origin), entorigin);
2560         cont = Mod_Q1BSP_NativeContentsFromSuperContents(SV_PointSuperContents(entorigin));
2561         if (!PRVM_serveredictfloat(ent, watertype))
2562         {
2563                 // just spawned here
2564                 if (!sv_gameplayfix_fixedcheckwatertransition.integer)
2565                 {
2566                         PRVM_serveredictfloat(ent, watertype) = cont;
2567                         PRVM_serveredictfloat(ent, waterlevel) = 1;
2568                         return;
2569                 }
2570         }
2571         // DRESK - Support for Entity Contents Transition Event
2572         // NOTE: Call here BEFORE updating the watertype below,
2573         // and suppress watersplash sound if a valid function
2574         // call was made to allow for custom "splash" sounds.
2575         else if( !SV_CheckContentsTransition(ent, cont) )
2576         { // Contents Transition Function Invalid; Potentially Play Water Sound
2577                 // check if the entity crossed into or out of water
2578                 if (sv_sound_watersplash.string && ((PRVM_serveredictfloat(ent, watertype) == CONTENTS_WATER || PRVM_serveredictfloat(ent, watertype) == CONTENTS_SLIME) != (cont == CONTENTS_WATER || cont == CONTENTS_SLIME)))
2579                         SV_StartSound (ent, 0, sv_sound_watersplash.string, 255, 1, false, 1.0f);
2580         }
2581
2582         if (cont <= CONTENTS_WATER)
2583         {
2584                 PRVM_serveredictfloat(ent, watertype) = cont;
2585                 PRVM_serveredictfloat(ent, waterlevel) = 1;
2586         }
2587         else
2588         {
2589                 PRVM_serveredictfloat(ent, watertype) = CONTENTS_EMPTY;
2590                 PRVM_serveredictfloat(ent, waterlevel) = sv_gameplayfix_fixedcheckwatertransition.integer ? 0 : cont;
2591         }
2592 }
2593
2594 /*
2595 =============
2596 SV_Physics_Toss
2597
2598 Toss, bounce, and fly movement.  When onground, do nothing.
2599 =============
2600 */
2601
2602 void SV_Physics_Toss (prvm_edict_t *ent)
2603 {
2604         prvm_prog_t *prog = SVVM_prog;
2605         trace_t trace;
2606         vec3_t move;
2607         vec_t movetime;
2608         int bump;
2609         prvm_edict_t *groundentity;
2610         float d, ent_gravity;
2611         float bouncefactor;
2612         float bouncestop;
2613
2614 // if onground, return without moving
2615         if ((int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND)
2616         {
2617                 groundentity = PRVM_PROG_TO_EDICT(PRVM_serveredictedict(ent, groundentity));
2618                 if (PRVM_serveredictvector(ent, velocity)[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer)
2619                 {
2620                         // don't stick to ground if onground and moving upward
2621                         PRVM_serveredictfloat(ent, flags) -= FL_ONGROUND;
2622                 }
2623                 else if (!PRVM_serveredictedict(ent, groundentity) || !sv_gameplayfix_noairborncorpse.integer)
2624                 {
2625                         // we can trust FL_ONGROUND if groundentity is world because it never moves
2626                         return;
2627                 }
2628                 else if (ent->priv.server->suspendedinairflag && groundentity->free)
2629                 {
2630                         // if ent was supported by a brush model on previous frame,
2631                         // and groundentity is now freed, set groundentity to 0 (world)
2632                         // which leaves it suspended in the air
2633                         PRVM_serveredictedict(ent, groundentity) = 0;
2634                         if (sv_gameplayfix_noairborncorpse_allowsuspendeditems.integer)
2635                                 return;
2636                 }
2637                 else if (BoxesOverlap(ent->priv.server->cullmins, ent->priv.server->cullmaxs, groundentity->priv.server->cullmins, groundentity->priv.server->cullmaxs))
2638                 {
2639                         // don't slide if still touching the groundentity
2640                         return;
2641                 }
2642         }
2643         ent->priv.server->suspendedinairflag = false;
2644
2645         SV_CheckVelocity (ent);
2646
2647 // add gravity
2648         if (PRVM_serveredictfloat(ent, movetype) == MOVETYPE_TOSS || PRVM_serveredictfloat(ent, movetype) == MOVETYPE_BOUNCE)
2649                 PRVM_serveredictvector(ent, velocity)[2] -= SV_Gravity(ent);
2650
2651 // move angles
2652         VectorMA (PRVM_serveredictvector(ent, angles), sv.frametime, PRVM_serveredictvector(ent, avelocity), PRVM_serveredictvector(ent, angles));
2653
2654         movetime = sv.frametime;
2655         for (bump = 0;bump < MAX_CLIP_PLANES && movetime > 0;bump++)
2656         {
2657         // move origin
2658                 VectorScale(PRVM_serveredictvector(ent, velocity), movetime, move);
2659                 // The buzzsaw traps in r2m6 and r2m7 use MOVETYPE_FLY and rely on moving while stuck in the world.
2660                 // Quake movetypes checked allsolid only in SV_FlyMove().
2661                 if(!SV_PushEntity(&trace, ent, move, true, PRVM_serveredictfloat(ent, movetype) != MOVETYPE_FLY))
2662                         return; // teleported
2663                 if (ent->free)
2664                         return;
2665                 if (trace.fraction == 1)
2666                         break;
2667                 movetime *= 1 - min(1, trace.fraction);
2668                 switch((int)PRVM_serveredictfloat(ent, movetype))
2669                 {
2670                 case MOVETYPE_BOUNCEMISSILE:
2671                         bouncefactor = PRVM_serveredictfloat(ent, bouncefactor);
2672                         if (!bouncefactor)
2673                                 bouncefactor = 1.0f;
2674
2675                         ClipVelocity(PRVM_serveredictvector(ent, velocity), trace.plane.normal, PRVM_serveredictvector(ent, velocity), 1 + bouncefactor);
2676                         PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) & ~FL_ONGROUND;
2677                         if (!sv_gameplayfix_slidemoveprojectiles.integer)
2678                                 movetime = 0;
2679                         break;
2680                 case MOVETYPE_BOUNCE:
2681                         bouncefactor = PRVM_serveredictfloat(ent, bouncefactor);
2682                         if (!bouncefactor)
2683                                 bouncefactor = 0.5f;
2684
2685                         bouncestop = PRVM_serveredictfloat(ent, bouncestop);
2686                         if (!bouncestop)
2687                                 bouncestop = 60.0f / 800.0f;
2688
2689                         ClipVelocity(PRVM_serveredictvector(ent, velocity), trace.plane.normal, PRVM_serveredictvector(ent, velocity), 1 + bouncefactor);
2690                         ent_gravity = PRVM_serveredictfloat(ent, gravity);
2691                         if (!ent_gravity)
2692                                 ent_gravity = 1.0f;
2693                         // LadyHavoc: fixed grenades not bouncing when fired down a slope
2694                         if (sv_gameplayfix_grenadebouncedownslopes.integer)
2695                                 d = fabs(DotProduct(trace.plane.normal, PRVM_serveredictvector(ent, velocity)));
2696                         else
2697                                 d = PRVM_serveredictvector(ent, velocity)[2];
2698                         if (trace.plane.normal[2] > 0.7 && d < sv_gravity.value * bouncestop * ent_gravity)
2699                         {
2700                                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) | FL_ONGROUND;
2701                                 PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(trace.ent);
2702                                 VectorClear(PRVM_serveredictvector(ent, velocity));
2703                                 VectorClear(PRVM_serveredictvector(ent, avelocity));
2704                                 movetime = 0;
2705                         }
2706                         else
2707                         {
2708                                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) & ~FL_ONGROUND;
2709                                 if (!sv_gameplayfix_slidemoveprojectiles.integer)
2710                                         movetime = 0;
2711                         }
2712                         break;
2713                 default:
2714                         ClipVelocity (PRVM_serveredictvector(ent, velocity), trace.plane.normal, PRVM_serveredictvector(ent, velocity), 1.0);
2715                         if (trace.plane.normal[2] > 0.7)
2716                         {
2717                                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) | FL_ONGROUND;
2718                                 PRVM_serveredictedict(ent, groundentity) = PRVM_EDICT_TO_PROG(trace.ent);
2719                                 if (PRVM_serveredictfloat(((prvm_edict_t *)trace.ent), solid) == SOLID_BSP)
2720                                         ent->priv.server->suspendedinairflag = true;
2721                                 VectorClear (PRVM_serveredictvector(ent, velocity));
2722                                 VectorClear (PRVM_serveredictvector(ent, avelocity));
2723                                 movetime = 0;
2724                         }
2725                         else
2726                         {
2727                                 PRVM_serveredictfloat(ent, flags) = (int)PRVM_serveredictfloat(ent, flags) & ~FL_ONGROUND;
2728                                 if (!sv_gameplayfix_slidemoveprojectiles.integer)
2729                                         movetime = 0;
2730                         }
2731                         break;
2732                 }
2733         }
2734
2735 // check for in water
2736         SV_CheckWaterTransition (ent);
2737 }
2738
2739 /*
2740 ===============================================================================
2741
2742 STEPPING MOVEMENT
2743
2744 ===============================================================================
2745 */
2746
2747 /*
2748 =============
2749 SV_Physics_Step
2750
2751 Monsters freefall when they don't have a ground entity, otherwise
2752 all movement is done with discrete steps.
2753
2754 This is also used for objects that have become still on the ground, but
2755 will fall if the floor is pulled out from under them.
2756 =============
2757 */
2758 static void SV_Physics_Step (prvm_edict_t *ent)
2759 {
2760         prvm_prog_t *prog = SVVM_prog;
2761         int flags = (int)PRVM_serveredictfloat(ent, flags);
2762
2763         // DRESK
2764         // Backup Velocity in the event that movetypesteplandevent is called,
2765         // to provide a parameter with the entity's velocity at impact.
2766         vec3_t backupVelocity;
2767         VectorCopy(PRVM_serveredictvector(ent, velocity), backupVelocity);
2768         // don't fall at all if fly/swim
2769         if (!(flags & (FL_FLY | FL_SWIM)))
2770         {
2771                 if (flags & FL_ONGROUND)
2772                 {
2773                         // freefall if onground and moving upward
2774                         // freefall if not standing on a world surface (it may be a lift or trap door)
2775                         if (PRVM_serveredictvector(ent, velocity)[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer)
2776                         {
2777                                 PRVM_serveredictfloat(ent, flags) -= FL_ONGROUND;
2778                                 SV_CheckVelocity(ent);
2779                                 SV_FlyMove(ent, sv.frametime, true, NULL, SV_GenericHitSuperContentsMask(ent), 0, 0, 0);
2780                                 SV_LinkEdict(ent);
2781                                 SV_LinkEdict_TouchAreaGrid(ent);
2782                                 ent->priv.server->waterposition_forceupdate = true;
2783                         }
2784                 }
2785                 else
2786                 {
2787                         // freefall if not onground
2788                         int hitsound = PRVM_serveredictvector(ent, velocity)[2] < sv_gravity.value * -0.1;
2789
2790                         SV_CheckVelocity(ent);
2791                         SV_FlyMove(ent, sv.frametime, true, NULL, SV_GenericHitSuperContentsMask(ent), 0, 0, 0);
2792                         SV_LinkEdict(ent);
2793                         SV_LinkEdict_TouchAreaGrid(ent);
2794
2795                         // just hit ground
2796                         if (hitsound && (int)PRVM_serveredictfloat(ent, flags) & FL_ONGROUND)
2797                         {
2798                                 // DRESK - Check for Entity Land Event Function
2799                                 if(PRVM_serveredictfunction(ent, movetypesteplandevent))
2800                                 { // Valid Function; Execute
2801                                         // Prepare Parameters
2802                                         // Assign Velocity at Impact
2803                                         PRVM_G_VECTOR(OFS_PARM0)[0] = backupVelocity[0];
2804                                         PRVM_G_VECTOR(OFS_PARM0)[1] = backupVelocity[1];
2805                                         PRVM_G_VECTOR(OFS_PARM0)[2] = backupVelocity[2];
2806                                         // Assign Self
2807                                         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
2808                                         // Set Time
2809                                         PRVM_serverglobalfloat(time) = sv.time;
2810                                         // Execute VM Function
2811                                         prog->ExecuteProgram(prog, PRVM_serveredictfunction(ent, movetypesteplandevent), "movetypesteplandevent: NULL function");
2812                                 }
2813                                 else
2814                                 // Check for Engine Landing Sound
2815                                 if(sv_sound_land.string)
2816                                         SV_StartSound(ent, 0, sv_sound_land.string, 255, 1, false, 1.0f);
2817                         }
2818                         ent->priv.server->waterposition_forceupdate = true;
2819                 }
2820         }
2821 }
2822
2823 //============================================================================
2824
2825 static void SV_Physics_Entity (prvm_edict_t *ent)
2826 {
2827         prvm_prog_t *prog = SVVM_prog;
2828         // don't run think/move on newly spawned projectiles as it messes up
2829         // movement interpolation and rocket trails, and is inconsistent with
2830         // respect to entities spawned in the same frame
2831         // (if an ent spawns a higher numbered ent, it moves in the same frame,
2832         //  but if it spawns a lower numbered ent, it doesn't - this never moves
2833         //  ents in the first frame regardless)
2834         qbool runmove = ent->priv.server->move;
2835         ent->priv.server->move = true;
2836         if (!runmove && sv_gameplayfix_delayprojectiles.integer > 0)
2837                 return;
2838         switch ((int) PRVM_serveredictfloat(ent, movetype))
2839         {
2840         case MOVETYPE_PUSH:
2841         case MOVETYPE_FAKEPUSH:
2842                 SV_Physics_Pusher (ent);
2843                 break;
2844         case MOVETYPE_NONE:
2845                 // LadyHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2846                 if (PRVM_serveredictfloat(ent, nextthink) > 0 && PRVM_serveredictfloat(ent, nextthink) <= sv.time + sv.frametime)
2847                         SV_RunThink (ent);
2848                 break;
2849         case MOVETYPE_FOLLOW:
2850                 if(SV_RunThink(ent))
2851                         SV_Physics_Follow (ent);
2852                 break;
2853         case MOVETYPE_NOCLIP:
2854                 if (SV_RunThink(ent))
2855                 {
2856                         SV_CheckWater(ent);
2857                         VectorMA(PRVM_serveredictvector(ent, origin), sv.frametime, PRVM_serveredictvector(ent, velocity), PRVM_serveredictvector(ent, origin));
2858                         VectorMA(PRVM_serveredictvector(ent, angles), sv.frametime, PRVM_serveredictvector(ent, avelocity), PRVM_serveredictvector(ent, angles));
2859                 }
2860                 SV_LinkEdict(ent);
2861                 break;
2862         case MOVETYPE_STEP:
2863                 SV_Physics_Step (ent);
2864                 // regular thinking
2865                 if (SV_RunThink(ent))
2866                 if (ent->priv.server->waterposition_forceupdate || !VectorCompare(PRVM_serveredictvector(ent, origin), ent->priv.server->waterposition_origin))
2867                 {
2868                         ent->priv.server->waterposition_forceupdate = false;
2869                         VectorCopy(PRVM_serveredictvector(ent, origin), ent->priv.server->waterposition_origin);
2870                         SV_CheckWaterTransition(ent);
2871                 }
2872                 break;
2873         case MOVETYPE_WALK:
2874                 if (SV_RunThink (ent))
2875                         SV_WalkMove (ent);
2876                 break;
2877         case MOVETYPE_TOSS:
2878         case MOVETYPE_BOUNCE:
2879         case MOVETYPE_BOUNCEMISSILE:
2880         case MOVETYPE_FLYMISSILE:
2881         case MOVETYPE_FLY:
2882         case MOVETYPE_FLY_WORLDONLY:
2883                 // regular thinking
2884                 if (SV_RunThink (ent))
2885                         SV_Physics_Toss (ent);
2886                 break;
2887         case MOVETYPE_PHYSICS:
2888                 if (SV_RunThink(ent))
2889                 {
2890                         SV_LinkEdict(ent);
2891                         SV_LinkEdict_TouchAreaGrid(ent);
2892                 }
2893                 break;
2894         default:
2895                 if((int) PRVM_serveredictfloat(ent, movetype) >= MOVETYPE_USER_FIRST && (int) PRVM_serveredictfloat(ent, movetype) <= MOVETYPE_USER_LAST)
2896                         break;
2897                 Con_Printf ("SV_Physics: bad movetype %i\n", (int)PRVM_serveredictfloat(ent, movetype));
2898                 break;
2899         }
2900 }
2901
2902 static void SV_Physics_ClientEntity_NoThink (prvm_edict_t *ent)
2903 {
2904         prvm_prog_t *prog = SVVM_prog;
2905
2906         // don't run think at all, that is done during server frames
2907         // instead, call the movetypes directly so they match client input
2908
2909         // This probably only makes sense for CSQC-networked (SendEntity field set) player entities
2910         switch ((int) PRVM_serveredictfloat(ent, movetype))
2911         {
2912         case MOVETYPE_PUSH:
2913         case MOVETYPE_FAKEPUSH:
2914                 // push physics relies heavily on think times and calls, and so cannot be predicted currently
2915                 Con_Printf ("SV_Physics_ClientEntity_NoThink: bad movetype %i\n", (int)PRVM_serveredictfloat(ent, movetype));
2916                 break;
2917         case MOVETYPE_NONE:
2918                 break;
2919         case MOVETYPE_FOLLOW:
2920                 SV_Physics_Follow (ent);
2921                 break;
2922         case MOVETYPE_NOCLIP:
2923                 VectorMA(PRVM_serveredictvector(ent, origin), sv.frametime, PRVM_serveredictvector(ent, velocity), PRVM_serveredictvector(ent, origin));
2924                 VectorMA(PRVM_serveredictvector(ent, angles), sv.frametime, PRVM_serveredictvector(ent, avelocity), PRVM_serveredictvector(ent, angles));
2925                 break;
2926         case MOVETYPE_STEP:
2927                 SV_Physics_Step (ent);
2928                 break;
2929         case MOVETYPE_WALK:
2930                 SV_WalkMove (ent);
2931                 break;
2932         case MOVETYPE_TOSS:
2933         case MOVETYPE_BOUNCE:
2934         case MOVETYPE_BOUNCEMISSILE:
2935         case MOVETYPE_FLYMISSILE:
2936                 SV_Physics_Toss (ent);
2937                 break;
2938         case MOVETYPE_FLY:
2939         case MOVETYPE_FLY_WORLDONLY:
2940                 SV_WalkMove (ent);
2941                 break;
2942         case MOVETYPE_PHYSICS:
2943                 break;
2944         default:
2945                 if((int) PRVM_serveredictfloat(ent, movetype) >= MOVETYPE_USER_FIRST && (int) PRVM_serveredictfloat(ent, movetype) <= MOVETYPE_USER_LAST)
2946                         break;
2947                 Con_Printf ("SV_Physics_ClientEntity_NoThink: bad movetype %i\n", (int)PRVM_serveredictfloat(ent, movetype));
2948                 break;
2949         }
2950 }
2951
2952 // asynchronous path
2953 void SV_Physics_ClientMove(void)
2954 {
2955         prvm_prog_t *prog = SVVM_prog;
2956         prvm_edict_t *ent;
2957         ent = host_client->edict;
2958
2959         // call player physics, this needs the proper frametime
2960         PRVM_serverglobalfloat(frametime) = sv.frametime;
2961         SV_PlayerPhysics();
2962
2963         // call standard client pre-think, with frametime = 0
2964         PRVM_serverglobalfloat(time) = sv.time;
2965         PRVM_serverglobalfloat(frametime) = 0;
2966         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
2967         prog->ExecuteProgram(prog, PRVM_serverfunction(PlayerPreThink), "QC function PlayerPreThink is missing");
2968         PRVM_serverglobalfloat(frametime) = sv.frametime;
2969
2970         // make sure the velocity is sane (not a NaN)
2971         SV_CheckVelocity(ent);
2972
2973         // perform movetype behaviour
2974         // note: will always be MOVETYPE_WALK if disableclientprediction = 0
2975         SV_Physics_ClientEntity_NoThink (ent);
2976
2977         // call standard player post-think, with frametime = 0
2978         PRVM_serverglobalfloat(time) = sv.time;
2979         PRVM_serverglobalfloat(frametime) = 0;
2980         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
2981         prog->ExecuteProgram(prog, PRVM_serverfunction(PlayerPostThink), "QC function PlayerPostThink is missing");
2982         PRVM_serverglobalfloat(frametime) = sv.frametime;
2983
2984         if(PRVM_serveredictfloat(ent, fixangle))
2985         {
2986                 // angle fixing was requested by physics code...
2987                 // so store the current angles for later use
2988                 VectorCopy(PRVM_serveredictvector(ent, angles), host_client->fixangle_angles);
2989                 host_client->fixangle_angles_set = true;
2990
2991                 // and clear fixangle for the next frame
2992                 PRVM_serveredictfloat(ent, fixangle) = 0;
2993         }
2994 }
2995
2996 static void SV_Physics_ClientEntity_PreThink(prvm_edict_t *ent)
2997 {
2998         prvm_prog_t *prog = SVVM_prog;
2999         // don't do physics on disconnected clients, FrikBot relies on this
3000         if (!host_client->begun)
3001                 return;
3002
3003         // make sure the velocity is sane (not a NaN)
3004         SV_CheckVelocity(ent);
3005
3006         // don't run physics here if running asynchronously
3007         if (host_client->clmovement_inputtimeout <= 0)
3008         {
3009                 SV_PlayerPhysics();
3010                 //host_client->cmd.time = max(host_client->cmd.time, sv.time);
3011         }
3012
3013         // make sure the velocity is still sane (not a NaN)
3014         SV_CheckVelocity(ent);
3015
3016         // call standard client pre-think
3017         PRVM_serverglobalfloat(time) = sv.time;
3018         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
3019         prog->ExecuteProgram(prog, PRVM_serverfunction(PlayerPreThink), "QC function PlayerPreThink is missing");
3020
3021         // make sure the velocity is still sane (not a NaN)
3022         SV_CheckVelocity(ent);
3023 }
3024
3025 static void SV_Physics_ClientEntity_PostThink(prvm_edict_t *ent)
3026 {
3027         prvm_prog_t *prog = SVVM_prog;
3028         // don't do physics on disconnected clients, FrikBot relies on this
3029         if (!host_client->begun)
3030                 return;
3031
3032         // make sure the velocity is sane (not a NaN)
3033         SV_CheckVelocity(ent);
3034
3035         // call standard player post-think
3036         PRVM_serverglobalfloat(time) = sv.time;
3037         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(ent);
3038         prog->ExecuteProgram(prog, PRVM_serverfunction(PlayerPostThink), "QC function PlayerPostThink is missing");
3039
3040         // make sure the velocity is still sane (not a NaN)
3041         SV_CheckVelocity(ent);
3042
3043         if(PRVM_serveredictfloat(ent, fixangle))
3044         {
3045                 // angle fixing was requested by physics code...
3046                 // so store the current angles for later use
3047                 VectorCopy(PRVM_serveredictvector(ent, angles), host_client->fixangle_angles);
3048                 host_client->fixangle_angles_set = true;
3049
3050                 // and clear fixangle for the next frame
3051                 PRVM_serveredictfloat(ent, fixangle) = 0;
3052         }
3053
3054         // decrement the countdown variable used to decide when to go back to
3055         // synchronous physics
3056         if (host_client->clmovement_inputtimeout > sv.frametime)
3057                 host_client->clmovement_inputtimeout -= sv.frametime;
3058         else
3059                 host_client->clmovement_inputtimeout = 0;
3060 }
3061
3062 static void SV_Physics_ClientEntity(prvm_edict_t *ent)
3063 {
3064         prvm_prog_t *prog = SVVM_prog;
3065         // don't do physics on disconnected clients, FrikBot relies on this
3066         if (!host_client->begun)
3067         {
3068                 memset(&host_client->cmd, 0, sizeof(host_client->cmd));
3069                 return;
3070         }
3071
3072         // make sure the velocity is sane (not a NaN)
3073         SV_CheckVelocity(ent);
3074
3075         switch ((int) PRVM_serveredictfloat(ent, movetype))
3076         {
3077         case MOVETYPE_PUSH:
3078         case MOVETYPE_FAKEPUSH:
3079                 SV_Physics_Pusher (ent);
3080                 break;
3081         case MOVETYPE_NONE:
3082                 // LadyHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
3083                 if (PRVM_serveredictfloat(ent, nextthink) > 0 && PRVM_serveredictfloat(ent, nextthink) <= sv.time + sv.frametime)
3084                         SV_RunThink (ent);
3085                 break;
3086         case MOVETYPE_FOLLOW:
3087                 SV_RunThink (ent);
3088                 if (host_client->clmovement_inputtimeout <= 0) // don't run physics here if running asynchronously
3089                         SV_Physics_Follow (ent);
3090                 break;
3091         case MOVETYPE_NOCLIP:
3092                 SV_RunThink(ent);
3093                 if (host_client->clmovement_inputtimeout <= 0) // don't run physics here if running asynchronously
3094                 {
3095                         SV_CheckWater(ent);
3096                         VectorMA(PRVM_serveredictvector(ent, origin), sv.frametime, PRVM_serveredictvector(ent, velocity), PRVM_serveredictvector(ent, origin));
3097                         VectorMA(PRVM_serveredictvector(ent, angles), sv.frametime, PRVM_serveredictvector(ent, avelocity), PRVM_serveredictvector(ent, angles));
3098                 }
3099                 break;
3100         case MOVETYPE_STEP:
3101                 if (host_client->clmovement_inputtimeout <= 0) // don't run physics here if running asynchronously
3102                         SV_Physics_Step (ent);
3103                 if (SV_RunThink(ent))
3104                 if (ent->priv.server->waterposition_forceupdate || !VectorCompare(PRVM_serveredictvector(ent, origin), ent->priv.server->waterposition_origin))
3105                 {
3106                         ent->priv.server->waterposition_forceupdate = false;
3107                         VectorCopy(PRVM_serveredictvector(ent, origin), ent->priv.server->waterposition_origin);
3108                         SV_CheckWaterTransition(ent);
3109                 }
3110                 break;
3111         case MOVETYPE_WALK:
3112                 SV_RunThink (ent);
3113                 // don't run physics here if running asynchronously
3114                 if (host_client->clmovement_inputtimeout <= 0)
3115                         SV_WalkMove (ent);
3116                 break;
3117         case MOVETYPE_TOSS:
3118         case MOVETYPE_BOUNCE:
3119         case MOVETYPE_BOUNCEMISSILE:
3120         case MOVETYPE_FLYMISSILE:
3121                 // regular thinking
3122                 SV_RunThink (ent);
3123                 if (host_client->clmovement_inputtimeout <= 0) // don't run physics here if running asynchronously
3124                         SV_Physics_Toss (ent);
3125                 break;
3126         case MOVETYPE_FLY:
3127         case MOVETYPE_FLY_WORLDONLY:
3128                 SV_RunThink (ent);
3129                 if (host_client->clmovement_inputtimeout <= 0) // don't run physics here if running asynchronously
3130                         SV_WalkMove (ent);
3131                 break;
3132         case MOVETYPE_PHYSICS:
3133                 SV_RunThink (ent);
3134                 break;
3135         default:
3136                 if((int) PRVM_serveredictfloat(ent, movetype) >= MOVETYPE_USER_FIRST && (int) PRVM_serveredictfloat(ent, movetype) <= MOVETYPE_USER_LAST)
3137                         break;
3138                 Con_Printf ("SV_Physics_ClientEntity: bad movetype %i\n", (int)PRVM_serveredictfloat(ent, movetype));
3139                 break;
3140         }
3141
3142         SV_CheckVelocity (ent);
3143
3144         SV_LinkEdict(ent);
3145         SV_LinkEdict_TouchAreaGrid(ent);
3146
3147         SV_CheckVelocity (ent);
3148 }
3149
3150 /*
3151 ================
3152 SV_Physics
3153
3154 ================
3155 */
3156 void SV_Physics (void)
3157 {
3158         prvm_prog_t *prog = SVVM_prog;
3159         int i;
3160         prvm_edict_t *ent;
3161
3162         // free memory for resources that are no longer referenced
3163         PRVM_GarbageCollection(prog);
3164
3165 // let the progs know that a new frame has started
3166         PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(prog->edicts);
3167         PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(prog->edicts);
3168         PRVM_serverglobalfloat(time) = sv.time;
3169         PRVM_serverglobalfloat(frametime) = sv.frametime;
3170         prog->ExecuteProgram(prog, PRVM_serverfunction(StartFrame), "QC function StartFrame is missing");
3171
3172 #ifdef USEODE
3173         // run physics engine
3174         World_Physics_Frame(&sv.world, sv.frametime, sv_gravity.value);
3175 #endif
3176
3177 //
3178 // treat each object in turn
3179 //
3180
3181         // if force_retouch, relink all the entities
3182         if (PRVM_serverglobalfloat(force_retouch) > 0)
3183                 for (i = 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
3184                         if (!ent->free)
3185                                 SV_LinkEdict_TouchAreaGrid(ent); // force retouch even for stationary
3186
3187         if (sv_gameplayfix_consistentplayerprethink.integer)
3188         {
3189                 // run physics on the client entities in 3 stages
3190                 for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
3191                         if (!ent->free)
3192                                 SV_Physics_ClientEntity_PreThink(ent);
3193
3194                 for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
3195                         if (!ent->free)
3196                                 SV_Physics_ClientEntity(ent);
3197
3198                 for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
3199                         if (!ent->free)
3200                                 SV_Physics_ClientEntity_PostThink(ent);
3201         }
3202         else
3203         {
3204                 // run physics on the client entities
3205                 for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
3206                 {
3207                         if (!ent->free)
3208                         {
3209                                 SV_Physics_ClientEntity_PreThink(ent);
3210                                 SV_Physics_ClientEntity(ent);
3211                                 SV_Physics_ClientEntity_PostThink(ent);
3212                         }
3213                 }
3214         }
3215
3216         // run physics on all the non-client entities
3217         if (!sv_freezenonclients.integer)
3218         {
3219                 for (;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
3220                         if (!ent->free)
3221                                 SV_Physics_Entity(ent);
3222                 // make a second pass to see if any ents spawned this frame and make
3223                 // sure they run their move/think
3224                 if (sv_gameplayfix_delayprojectiles.integer < 0)
3225                         for (i = svs.maxclients + 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
3226                                 if (!ent->priv.server->move && !ent->free)
3227                                         SV_Physics_Entity(ent);
3228         }
3229
3230         if (PRVM_serverglobalfloat(force_retouch) > 0)
3231                 PRVM_serverglobalfloat(force_retouch) = max(0, PRVM_serverglobalfloat(force_retouch) - 1);
3232
3233         // LadyHavoc: endframe support
3234         if (PRVM_serverfunction(EndFrame))
3235         {
3236                 PRVM_serverglobaledict(self) = PRVM_EDICT_TO_PROG(prog->edicts);
3237                 PRVM_serverglobaledict(other) = PRVM_EDICT_TO_PROG(prog->edicts);
3238                 PRVM_serverglobalfloat(time) = sv.time;
3239                 prog->ExecuteProgram(prog, PRVM_serverfunction(EndFrame), "QC function EndFrame is missing");
3240         }
3241
3242         // decrement prog->num_edicts if the highest number entities died
3243         for (;PRVM_ED_CanAlloc(prog, PRVM_EDICT_NUM(prog->num_edicts - 1));prog->num_edicts--);
3244
3245         if (!sv_freezenonclients.integer)
3246                 sv.time += sv.frametime;
3247 }