remove prvm_boundscheck cvar (security hole) and force bounds check on unless DP...
[divverent/darkplaces.git] / sv_phys.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // sv_phys.c
21
22 #include "quakedef.h"
23
24 /*
25
26
27 pushmove objects do not obey gravity, and do not interact with each other or trigger fields, but block normal movement and push normal objects when they move.
28
29 onground is set for toss objects when they come to a complete rest.  it is set for steping or walking objects
30
31 doors, plats, etc are SOLID_BSP, and MOVETYPE_PUSH
32 bonus items are SOLID_TRIGGER touch, and MOVETYPE_TOSS
33 corpses are SOLID_NOT and MOVETYPE_TOSS
34 crates are SOLID_BBOX and MOVETYPE_TOSS
35 walking monsters are SOLID_SLIDEBOX and MOVETYPE_STEP
36 flying/floating monsters are SOLID_SLIDEBOX and MOVETYPE_FLY
37
38 solid_edge items only clip against bsp models.
39
40 */
41
42 #define MOVE_EPSILON    0.01
43
44 void SV_Physics_Toss (prvm_edict_t *ent);
45
46 /*
47 ===============================================================================
48
49 LINE TESTING IN HULLS
50
51 ===============================================================================
52 */
53
54 int SV_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
55 {
56         prvm_eval_t *val;
57         if (passedict)
58         {
59                 val = PRVM_EDICTFIELDVALUE(passedict, prog->fieldoffsets.dphitcontentsmask);
60                 if (val && val->_float)
61                         return (int)val->_float;
62                 else if (passedict->fields.server->solid == SOLID_SLIDEBOX)
63                 {
64                         if ((int)passedict->fields.server->flags & FL_MONSTER)
65                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
66                         else
67                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
68                 }
69                 else if (passedict->fields.server->solid == SOLID_CORPSE)
70                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
71                 else if (passedict->fields.server->solid == SOLID_TRIGGER)
72                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
73                 else
74                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
75         }
76         else
77                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
78 }
79
80 /*
81 ==================
82 SV_Move
83 ==================
84 */
85 #if COLLISIONPARANOID >= 1
86 trace_t SV_Move_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
87 #else
88 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
89 #endif
90 {
91         vec3_t hullmins, hullmaxs;
92         int i, bodysupercontents;
93         int passedictprog;
94         qboolean pointtrace;
95         prvm_edict_t *traceowner, *touch;
96         trace_t trace;
97         // bounding box of entire move area
98         vec3_t clipboxmins, clipboxmaxs;
99         // size of the moving object
100         vec3_t clipmins, clipmaxs;
101         // size when clipping against monsters
102         vec3_t clipmins2, clipmaxs2;
103         // start and end origin of move
104         vec3_t clipstart, clipend;
105         // trace results
106         trace_t cliptrace;
107         // matrices to transform into/out of other entity's space
108         matrix4x4_t matrix, imatrix;
109         // model of other entity
110         model_t *model;
111         // list of entities to test for collisions
112         int numtouchedicts;
113         prvm_edict_t *touchedicts[MAX_EDICTS];
114
115         VectorCopy(start, clipstart);
116         VectorCopy(end, clipend);
117         VectorCopy(mins, clipmins);
118         VectorCopy(maxs, clipmaxs);
119         VectorCopy(mins, clipmins2);
120         VectorCopy(maxs, clipmaxs2);
121 #if COLLISIONPARANOID >= 3
122         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
123 #endif
124
125         // clip to world
126         Collision_ClipToWorld(&cliptrace, sv.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
127         cliptrace.bmodelstartsolid = cliptrace.startsolid;
128         if (cliptrace.startsolid || cliptrace.fraction < 1)
129                 cliptrace.ent = prog->edicts;
130         if (type == MOVE_WORLDONLY)
131                 return cliptrace;
132
133         if (type == MOVE_MISSILE)
134         {
135                 // LordHavoc: modified this, was = -15, now -= 15
136                 for (i = 0;i < 3;i++)
137                 {
138                         clipmins2[i] -= 15;
139                         clipmaxs2[i] += 15;
140                 }
141         }
142
143         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
144         if (sv.worldmodel && sv.worldmodel->brush.RoundUpToHullSize)
145                 sv.worldmodel->brush.RoundUpToHullSize(sv.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
146         else
147         {
148                 VectorCopy(clipmins, hullmins);
149                 VectorCopy(clipmaxs, hullmaxs);
150         }
151
152         // create the bounding box of the entire move
153         for (i = 0;i < 3;i++)
154         {
155                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
156                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
157         }
158
159         // debug override to test against everything
160         if (sv_debugmove.integer)
161         {
162                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
163                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
164         }
165
166         // if the passedict is world, make it NULL (to avoid two checks each time)
167         if (passedict == prog->edicts)
168                 passedict = NULL;
169         // precalculate prog value for passedict for comparisons
170         passedictprog = PRVM_EDICT_TO_PROG(passedict);
171         // figure out whether this is a point trace for comparisons
172         pointtrace = VectorCompare(clipmins, clipmaxs);
173         // precalculate passedict's owner edict pointer for comparisons
174         traceowner = passedict ? PRVM_PROG_TO_EDICT(passedict->fields.server->owner) : 0;
175
176         // clip to entities
177         // because this uses World_EntitiestoBox, we know all entity boxes overlap
178         // the clip region, so we can skip culling checks in the loop below
179         numtouchedicts = World_EntitiesInBox(&sv.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
180         if (numtouchedicts > MAX_EDICTS)
181         {
182                 // this never happens
183                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
184                 numtouchedicts = MAX_EDICTS;
185         }
186         for (i = 0;i < numtouchedicts;i++)
187         {
188                 touch = touchedicts[i];
189
190                 if (touch->fields.server->solid < SOLID_BBOX)
191                         continue;
192                 if (type == MOVE_NOMONSTERS && touch->fields.server->solid != SOLID_BSP)
193                         continue;
194
195                 if (passedict)
196                 {
197                         // don't clip against self
198                         if (passedict == touch)
199                                 continue;
200                         // don't clip owned entities against owner
201                         if (traceowner == touch)
202                                 continue;
203                         // don't clip owner against owned entities
204                         if (passedictprog == touch->fields.server->owner)
205                                 continue;
206                         // don't clip points against points (they can't collide)
207                         if (pointtrace && VectorCompare(touch->fields.server->mins, touch->fields.server->maxs) && (type != MOVE_MISSILE || !((int)touch->fields.server->flags & FL_MONSTER)))
208                                 continue;
209                 }
210
211                 bodysupercontents = touch->fields.server->solid == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
212
213                 // might interact, so do an exact clip
214                 model = NULL;
215                 if ((int) touch->fields.server->solid == SOLID_BSP || type == MOVE_HITMODEL)
216                 {
217                         unsigned int modelindex = (unsigned int)touch->fields.server->modelindex;
218                         // if the modelindex is 0, it shouldn't be SOLID_BSP!
219                         if (modelindex > 0 && modelindex < MAX_MODELS)
220                                 model = sv.models[(int)touch->fields.server->modelindex];
221                 }
222                 if (model)
223                         Matrix4x4_CreateFromQuakeEntity(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2], touch->fields.server->angles[0], touch->fields.server->angles[1], touch->fields.server->angles[2], 1);
224                 else
225                         Matrix4x4_CreateTranslate(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2]);
226                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
227                 if ((int)touch->fields.server->flags & FL_MONSTER)
228                         Collision_ClipToGenericEntity(&trace, model, touch->fields.server->frame, touch->fields.server->mins, touch->fields.server->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
229                 else
230                         Collision_ClipToGenericEntity(&trace, model, touch->fields.server->frame, touch->fields.server->mins, touch->fields.server->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
231
232                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, touch->fields.server->solid == SOLID_BSP);
233         }
234
235         return cliptrace;
236 }
237
238 #if COLLISIONPARANOID >= 1
239 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask)
240 {
241         int endstuck;
242         trace_t trace;
243         vec3_t temp;
244         trace = SV_Move_(start, mins, maxs, end, type, passedict, hitsupercontentsmask);
245         if (passedict)
246         {
247                 VectorCopy(trace.endpos, temp);
248                 endstuck = SV_Move_(temp, mins, maxs, temp, type, passedict, hitsupercontentsmask).startsolid;
249 #if COLLISIONPARANOID < 3
250                 if (trace.startsolid || endstuck)
251 #endif
252                         Con_Printf("%s{e%i:%f %f %f:%f %f %f:%f:%f %f %f%s%s}\n", (trace.startsolid || endstuck) ? "^3" : "", passedict ? (int)(passedict - prog->edicts) : -1, passedict->fields.server->origin[0], passedict->fields.server->origin[1], passedict->fields.server->origin[2], end[0] - passedict->fields.server->origin[0], end[1] - passedict->fields.server->origin[1], end[2] - passedict->fields.server->origin[2], trace.fraction, trace.endpos[0] - passedict->fields.server->origin[0], trace.endpos[1] - passedict->fields.server->origin[1], trace.endpos[2] - passedict->fields.server->origin[2], trace.startsolid ? " startstuck" : "", endstuck ? " endstuck" : "");
253         }
254         return trace;
255 }
256 #endif
257
258 int SV_PointSuperContents(const vec3_t point)
259 {
260         int supercontents = 0;
261         int i;
262         prvm_edict_t *touch;
263         vec3_t transformed;
264         // matrices to transform into/out of other entity's space
265         matrix4x4_t matrix, imatrix;
266         // model of other entity
267         model_t *model;
268         unsigned int modelindex;
269         int frame;
270         // list of entities to test for collisions
271         int numtouchedicts;
272         prvm_edict_t *touchedicts[MAX_EDICTS];
273
274         // get world supercontents at this point
275         if (sv.worldmodel && sv.worldmodel->PointSuperContents)
276                 supercontents = sv.worldmodel->PointSuperContents(sv.worldmodel, 0, point);
277
278         // if sv_gameplayfix_swiminbmodels is off we're done
279         if (!sv_gameplayfix_swiminbmodels.integer)
280                 return supercontents;
281
282         // get list of entities at this point
283         numtouchedicts = World_EntitiesInBox(&sv.world, point, point, MAX_EDICTS, touchedicts);
284         if (numtouchedicts > MAX_EDICTS)
285         {
286                 // this never happens
287                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
288                 numtouchedicts = MAX_EDICTS;
289         }
290         for (i = 0;i < numtouchedicts;i++)
291         {
292                 touch = touchedicts[i];
293
294                 // we only care about SOLID_BSP for pointcontents
295                 if (touch->fields.server->solid != SOLID_BSP)
296                         continue;
297
298                 // might interact, so do an exact clip
299                 modelindex = (unsigned int)touch->fields.server->modelindex;
300                 if (modelindex >= MAX_MODELS)
301                         continue;
302                 model = sv.models[(int)touch->fields.server->modelindex];
303                 if (!model || !model->PointSuperContents)
304                         continue;
305                 Matrix4x4_CreateFromQuakeEntity(&matrix, touch->fields.server->origin[0], touch->fields.server->origin[1], touch->fields.server->origin[2], touch->fields.server->angles[0], touch->fields.server->angles[1], touch->fields.server->angles[2], 1);
306                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
307                 Matrix4x4_Transform(&imatrix, point, transformed);
308                 frame = (int)touch->fields.server->frame;
309                 supercontents |= model->PointSuperContents(model, bound(0, frame, (model->numframes - 1)), transformed);
310         }
311
312         return supercontents;
313 }
314
315 /*
316 ===============================================================================
317
318 Linking entities into the world culling system
319
320 ===============================================================================
321 */
322
323 void SV_LinkEdict_TouchAreaGrid(prvm_edict_t *ent)
324 {
325         int i, numtouchedicts, old_self, old_other;
326         prvm_edict_t *touch, *touchedicts[MAX_EDICTS];
327
328         // build a list of edicts to touch, because the link loop can be corrupted
329         // by IncreaseEdicts called during touch functions
330         numtouchedicts = World_EntitiesInBox(&sv.world, ent->priv.server->areamins, ent->priv.server->areamaxs, MAX_EDICTS, touchedicts);
331         if (numtouchedicts > MAX_EDICTS)
332         {
333                 // this never happens
334                 Con_Printf("SV_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
335                 numtouchedicts = MAX_EDICTS;
336         }
337
338         old_self = prog->globals.server->self;
339         old_other = prog->globals.server->other;
340         for (i = 0;i < numtouchedicts;i++)
341         {
342                 touch = touchedicts[i];
343                 if (touch != ent && (int)touch->fields.server->solid == SOLID_TRIGGER && touch->fields.server->touch)
344                 {
345                         prvm_eval_t *val;
346                         prog->globals.server->self = PRVM_EDICT_TO_PROG(touch);
347                         prog->globals.server->other = PRVM_EDICT_TO_PROG(ent);
348                         prog->globals.server->time = sv.time;
349                         prog->globals.server->trace_allsolid = false;
350                         prog->globals.server->trace_startsolid = false;
351                         prog->globals.server->trace_fraction = 1;
352                         prog->globals.server->trace_inwater = false;
353                         prog->globals.server->trace_inopen = true;
354                         VectorCopy (touch->fields.server->origin, prog->globals.server->trace_endpos);
355                         VectorSet (prog->globals.server->trace_plane_normal, 0, 0, 1);
356                         prog->globals.server->trace_plane_dist = 0;
357                         prog->globals.server->trace_ent = PRVM_EDICT_TO_PROG(ent);
358                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dpstartcontents)))
359                                 val->_float = 0;
360                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitcontents)))
361                                 val->_float = 0;
362                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitq3surfaceflags)))
363                                 val->_float = 0;
364                         if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphittexturename)))
365                                 val->string = 0;
366                         PRVM_ExecuteProgram (touch->fields.server->touch, "QC function self.touch is missing");
367                 }
368         }
369         prog->globals.server->self = old_self;
370         prog->globals.server->other = old_other;
371 }
372
373 /*
374 ===============
375 SV_LinkEdict
376
377 ===============
378 */
379 void SV_LinkEdict (prvm_edict_t *ent, qboolean touch_triggers)
380 {
381         model_t *model;
382         vec3_t mins, maxs;
383
384         if (ent == prog->edicts)
385                 return;         // don't add the world
386
387         if (ent->priv.server->free)
388                 return;
389
390 // set the abs box
391
392         if (ent->fields.server->solid == SOLID_BSP)
393         {
394                 int modelindex = (int)ent->fields.server->modelindex;
395                 if (modelindex < 0 || modelindex > MAX_MODELS)
396                 {
397                         Con_Printf("edict %i: SOLID_BSP with invalid modelindex!\n", PRVM_NUM_FOR_EDICT(ent));
398                         modelindex = 0;
399                 }
400                 model = sv.models[modelindex];
401                 if (model != NULL)
402                 {
403                         if (!model->TraceBox && developer.integer >= 1)
404                                 Con_Printf("edict %i: SOLID_BSP with non-collidable model\n", PRVM_NUM_FOR_EDICT(ent));
405
406                         if (ent->fields.server->angles[0] || ent->fields.server->angles[2] || ent->fields.server->avelocity[0] || ent->fields.server->avelocity[2])
407                         {
408                                 VectorAdd(ent->fields.server->origin, model->rotatedmins, mins);
409                                 VectorAdd(ent->fields.server->origin, model->rotatedmaxs, maxs);
410                         }
411                         else if (ent->fields.server->angles[1] || ent->fields.server->avelocity[1])
412                         {
413                                 VectorAdd(ent->fields.server->origin, model->yawmins, mins);
414                                 VectorAdd(ent->fields.server->origin, model->yawmaxs, maxs);
415                         }
416                         else
417                         {
418                                 VectorAdd(ent->fields.server->origin, model->normalmins, mins);
419                                 VectorAdd(ent->fields.server->origin, model->normalmaxs, maxs);
420                         }
421                 }
422                 else
423                 {
424                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
425                         VectorAdd(ent->fields.server->origin, ent->fields.server->mins, mins);
426                         VectorAdd(ent->fields.server->origin, ent->fields.server->maxs, maxs);
427                 }
428         }
429         else
430         {
431                 VectorAdd(ent->fields.server->origin, ent->fields.server->mins, mins);
432                 VectorAdd(ent->fields.server->origin, ent->fields.server->maxs, maxs);
433         }
434
435 //
436 // to make items easier to pick up and allow them to be grabbed off
437 // of shelves, the abs sizes are expanded
438 //
439         if ((int)ent->fields.server->flags & FL_ITEM)
440         {
441                 mins[0] -= 15;
442                 mins[1] -= 15;
443                 mins[2] -= 1;
444                 maxs[0] += 15;
445                 maxs[1] += 15;
446                 maxs[2] += 1;
447         }
448         else
449         {
450                 // because movement is clipped an epsilon away from an actual edge,
451                 // we must fully check even when bounding boxes don't quite touch
452                 mins[0] -= 1;
453                 mins[1] -= 1;
454                 mins[2] -= 1;
455                 maxs[0] += 1;
456                 maxs[1] += 1;
457                 maxs[2] += 1;
458         }
459
460         VectorCopy(mins, ent->fields.server->absmin);
461         VectorCopy(maxs, ent->fields.server->absmax);
462
463         World_LinkEdict(&sv.world, ent, mins, maxs);
464
465         // if touch_triggers, call touch on all entities overlapping this box
466         if (touch_triggers && ent->fields.server->solid != SOLID_NOT)
467                 SV_LinkEdict_TouchAreaGrid(ent);
468 }
469
470 /*
471 ===============================================================================
472
473 Utility functions
474
475 ===============================================================================
476 */
477
478 /*
479 ============
480 SV_TestEntityPosition
481
482 returns true if the entity is in solid currently
483 ============
484 */
485 static int SV_TestEntityPosition (prvm_edict_t *ent, vec3_t offset)
486 {
487         vec3_t org;
488         trace_t trace;
489         VectorAdd(ent->fields.server->origin, offset, org);
490         trace = SV_Move (org, ent->fields.server->mins, ent->fields.server->maxs, ent->fields.server->origin, MOVE_NOMONSTERS, ent, SUPERCONTENTS_SOLID);
491         if (trace.startsupercontents & SUPERCONTENTS_SOLID)
492                 return true;
493         else
494         {
495                 if (sv.worldmodel->brushq1.numclipnodes && !VectorCompare(ent->fields.server->mins, ent->fields.server->maxs))
496                 {
497                         // q1bsp/hlbsp use hulls and if the entity does not exactly match
498                         // a hull size it is incorrectly tested, so this code tries to
499                         // 'fix' it slightly...
500                         // FIXME: this breaks entities larger than the hull size
501                         int i;
502                         vec3_t v, m1, m2, s;
503                         VectorAdd(org, ent->fields.server->mins, m1);
504                         VectorAdd(org, ent->fields.server->maxs, m2);
505                         VectorSubtract(m2, m1, s);
506 #define EPSILON (1.0f / 32.0f)
507                         if (s[0] >= EPSILON*2) {m1[0] += EPSILON;m2[0] -= EPSILON;}
508                         if (s[1] >= EPSILON*2) {m1[1] += EPSILON;m2[1] -= EPSILON;}
509                         if (s[2] >= EPSILON*2) {m1[2] += EPSILON;m2[2] -= EPSILON;}
510                         for (i = 0;i < 8;i++)
511                         {
512                                 v[0] = (i & 1) ? m2[0] : m1[0];
513                                 v[1] = (i & 2) ? m2[1] : m1[1];
514                                 v[2] = (i & 4) ? m2[2] : m1[2];
515                                 if (SV_PointSuperContents(v) & SUPERCONTENTS_SOLID)
516                                         return true;
517                         }
518                 }
519         }
520         // if the trace found a better position for the entity, move it there
521         if (VectorDistance2(trace.endpos, ent->fields.server->origin) >= 0.0001)
522                 VectorCopy(trace.endpos, ent->fields.server->origin);
523         return false;
524 }
525
526 /*
527 ================
528 SV_CheckAllEnts
529 ================
530 */
531 void SV_CheckAllEnts (void)
532 {
533         int e;
534         prvm_edict_t *check;
535
536         // see if any solid entities are inside the final position
537         check = PRVM_NEXT_EDICT(prog->edicts);
538         for (e = 1;e < prog->num_edicts;e++, check = PRVM_NEXT_EDICT(check))
539         {
540                 if (check->priv.server->free)
541                         continue;
542                 if (check->fields.server->movetype == MOVETYPE_PUSH
543                  || check->fields.server->movetype == MOVETYPE_NONE
544                  || check->fields.server->movetype == MOVETYPE_FOLLOW
545                  || check->fields.server->movetype == MOVETYPE_NOCLIP)
546                         continue;
547
548                 if (SV_TestEntityPosition (check, vec3_origin))
549                         Con_Print("entity in invalid position\n");
550         }
551 }
552
553 // DRESK - Support for Entity Contents Transition Event
554 /*
555 ================
556 SV_CheckContentsTransition
557
558 returns true if entity had a valid contentstransition function call
559 ================
560 */
561 int SV_CheckContentsTransition(prvm_edict_t *ent, const int nContents)
562 {
563         int bValidFunctionCall;
564         prvm_eval_t *contentstransition;
565
566         // Default Valid Function Call to False
567         bValidFunctionCall = false;
568
569         if(ent->fields.server->watertype != nContents)
570         { // Changed Contents
571                 // Acquire Contents Transition Function from QC
572                 contentstransition = PRVM_EDICTFIELDVALUE(ent, prog->fieldoffsets.contentstransition);
573
574                 if(contentstransition->function)
575                 { // Valid Function; Execute
576                         // Assign Valid Function
577                         bValidFunctionCall = true;
578                         // Prepare Parameters (Original Contents, New Contents)
579                                 // Original Contents
580                                 PRVM_G_FLOAT(OFS_PARM0) = ent->fields.server->watertype;
581                                 // New Contents
582                                 PRVM_G_FLOAT(OFS_PARM1) = nContents;
583                                 // Assign Self
584                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
585                         // Execute VM Function
586                         PRVM_ExecuteProgram(contentstransition->function, "contentstransition: NULL function");
587                 }
588         }
589
590         // Return if Function Call was Valid
591         return bValidFunctionCall;
592 }
593
594
595 /*
596 ================
597 SV_CheckVelocity
598 ================
599 */
600 void SV_CheckVelocity (prvm_edict_t *ent)
601 {
602         int i;
603         float wishspeed;
604
605 //
606 // bound velocity
607 //
608         for (i=0 ; i<3 ; i++)
609         {
610                 if (IS_NAN(ent->fields.server->velocity[i]))
611                 {
612                         Con_Printf("Got a NaN velocity on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(ent->fields.server->classname));
613                         ent->fields.server->velocity[i] = 0;
614                 }
615                 if (IS_NAN(ent->fields.server->origin[i]))
616                 {
617                         Con_Printf("Got a NaN origin on entity #%i (%s)\n", PRVM_NUM_FOR_EDICT(ent), PRVM_GetString(ent->fields.server->classname));
618                         ent->fields.server->origin[i] = 0;
619                 }
620         }
621
622         // LordHavoc: max velocity fix, inspired by Maddes's source fixes, but this is faster
623         wishspeed = DotProduct(ent->fields.server->velocity, ent->fields.server->velocity);
624         if (wishspeed > sv_maxvelocity.value * sv_maxvelocity.value)
625         {
626                 wishspeed = sv_maxvelocity.value / sqrt(wishspeed);
627                 ent->fields.server->velocity[0] *= wishspeed;
628                 ent->fields.server->velocity[1] *= wishspeed;
629                 ent->fields.server->velocity[2] *= wishspeed;
630         }
631 }
632
633 /*
634 =============
635 SV_RunThink
636
637 Runs thinking code if time.  There is some play in the exact time the think
638 function will be called, because it is called before any movement is done
639 in a frame.  Not used for pushmove objects, because they must be exact.
640 Returns false if the entity removed itself.
641 =============
642 */
643 qboolean SV_RunThink (prvm_edict_t *ent)
644 {
645         int iterations;
646
647         // don't let things stay in the past.
648         // it is possible to start that way by a trigger with a local time.
649         if (ent->fields.server->nextthink <= 0 || ent->fields.server->nextthink > sv.time + sv.frametime)
650                 return true;
651
652         for (iterations = 0;iterations < 128  && !ent->priv.server->free;iterations++)
653         {
654                 prog->globals.server->time = max(sv.time, ent->fields.server->nextthink);
655                 ent->fields.server->nextthink = 0;
656                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
657                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
658                 PRVM_ExecuteProgram (ent->fields.server->think, "QC function self.think is missing");
659                 // mods often set nextthink to time to cause a think every frame,
660                 // we don't want to loop in that case, so exit if the new nextthink is
661                 // <= the time the qc was told, also exit if it is past the end of the
662                 // frame
663                 if (ent->fields.server->nextthink <= prog->globals.server->time || ent->fields.server->nextthink > sv.time + sv.frametime || !sv_gameplayfix_multiplethinksperframe.integer)
664                         break;
665         }
666         return !ent->priv.server->free;
667 }
668
669 /*
670 ==================
671 SV_Impact
672
673 Two entities have touched, so run their touch functions
674 ==================
675 */
676 extern void VM_SetTraceGlobals(const trace_t *trace);
677 extern sizebuf_t vm_tempstringsbuf;
678 void SV_Impact (prvm_edict_t *e1, trace_t *trace)
679 {
680         int restorevm_tempstringsbuf_cursize;
681         int old_self, old_other;
682         prvm_edict_t *e2 = (prvm_edict_t *)trace->ent;
683         prvm_eval_t *val;
684
685         old_self = prog->globals.server->self;
686         old_other = prog->globals.server->other;
687         restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
688
689         VM_SetTraceGlobals(trace);
690
691         prog->globals.server->time = sv.time;
692         if (!e1->priv.server->free && !e2->priv.server->free && e1->fields.server->touch && e1->fields.server->solid != SOLID_NOT)
693         {
694                 prog->globals.server->self = PRVM_EDICT_TO_PROG(e1);
695                 prog->globals.server->other = PRVM_EDICT_TO_PROG(e2);
696                 PRVM_ExecuteProgram (e1->fields.server->touch, "QC function self.touch is missing");
697         }
698
699         if (!e1->priv.server->free && !e2->priv.server->free && e2->fields.server->touch && e2->fields.server->solid != SOLID_NOT)
700         {
701                 prog->globals.server->self = PRVM_EDICT_TO_PROG(e2);
702                 prog->globals.server->other = PRVM_EDICT_TO_PROG(e1);
703                 VectorCopy(e2->fields.server->origin, prog->globals.server->trace_endpos);
704                 VectorNegate(trace->plane.normal, prog->globals.server->trace_plane_normal);
705                 prog->globals.server->trace_plane_dist = -trace->plane.dist;
706                 prog->globals.server->trace_ent = PRVM_EDICT_TO_PROG(e1);
707                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dpstartcontents)))
708                         val->_float = 0;
709                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitcontents)))
710                         val->_float = 0;
711                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphitq3surfaceflags)))
712                         val->_float = 0;
713                 if ((val = PRVM_GLOBALFIELDVALUE(prog->globaloffsets.trace_dphittexturename)))
714                         val->string = 0;
715                 PRVM_ExecuteProgram (e2->fields.server->touch, "QC function self.touch is missing");
716         }
717
718         prog->globals.server->self = old_self;
719         prog->globals.server->other = old_other;
720         vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
721 }
722
723
724 /*
725 ==================
726 ClipVelocity
727
728 Slide off of the impacting object
729 returns the blocked flags (1 = floor, 2 = step / wall)
730 ==================
731 */
732 #define STOP_EPSILON 0.1
733 void ClipVelocity (vec3_t in, vec3_t normal, vec3_t out, float overbounce)
734 {
735         int i;
736         float backoff;
737
738         backoff = -DotProduct (in, normal) * overbounce;
739         VectorMA(in, backoff, normal, out);
740
741         for (i = 0;i < 3;i++)
742                 if (out[i] > -STOP_EPSILON && out[i] < STOP_EPSILON)
743                         out[i] = 0;
744 }
745
746
747 /*
748 ============
749 SV_FlyMove
750
751 The basic solid body movement clip that slides along multiple planes
752 Returns the clipflags if the velocity was modified (hit something solid)
753 1 = floor
754 2 = wall / step
755 4 = dead stop
756 If stepnormal is not NULL, the plane normal of any vertical wall hit will be stored
757 ============
758 */
759 // LordHavoc: increased from 5 to 32
760 #define MAX_CLIP_PLANES 32
761 int SV_FlyMove (prvm_edict_t *ent, float time, float *stepnormal, int hitsupercontentsmask)
762 {
763         int blocked, bumpcount;
764         int i, j, impact, numplanes;
765         float d, time_left;
766         vec3_t dir, end, planes[MAX_CLIP_PLANES], primal_velocity, original_velocity, new_velocity;
767         trace_t trace;
768         if (time <= 0)
769                 return 0;
770         blocked = 0;
771         VectorCopy(ent->fields.server->velocity, original_velocity);
772         VectorCopy(ent->fields.server->velocity, primal_velocity);
773         numplanes = 0;
774         time_left = time;
775         for (bumpcount = 0;bumpcount < MAX_CLIP_PLANES;bumpcount++)
776         {
777                 if (!ent->fields.server->velocity[0] && !ent->fields.server->velocity[1] && !ent->fields.server->velocity[2])
778                         break;
779
780                 VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
781                 trace = SV_Move(ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
782 #if 0
783                 //if (trace.fraction < 0.002)
784                 {
785 #if 1
786                         vec3_t start;
787                         trace_t testtrace;
788                         VectorCopy(ent->fields.server->origin, start);
789                         start[2] += 3;//0.03125;
790                         VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
791                         end[2] += 3;//0.03125;
792                         testtrace = SV_Move(start, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
793                         if (trace.fraction < testtrace.fraction && !testtrace.startsolid && (testtrace.fraction == 1 || DotProduct(trace.plane.normal, ent->fields.server->velocity) < DotProduct(testtrace.plane.normal, ent->fields.server->velocity)))
794                         {
795                                 Con_Printf("got further (new %f > old %f)\n", testtrace.fraction, trace.fraction);
796                                 trace = testtrace;
797                         }
798 #endif
799 #if 0
800                         //j = -1;
801                         for (i = 0;i < numplanes;i++)
802                         {
803                                 VectorCopy(ent->fields.server->origin, start);
804                                 VectorMA(ent->fields.server->origin, time_left, ent->fields.server->velocity, end);
805                                 VectorMA(start, 3, planes[i], start);
806                                 VectorMA(end, 3, planes[i], end);
807                                 testtrace = SV_Move(start, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
808                                 if (trace.fraction < testtrace.fraction)
809                                 {
810                                         trace = testtrace;
811                                         VectorCopy(start, ent->fields.server->origin);
812                                         //j = i;
813                                 }
814                         }
815                         //if (j >= 0)
816                         //      VectorAdd(ent->fields.server->origin, planes[j], start);
817 #endif
818                 }
819 #endif
820
821 #if 0
822                 Con_Printf("entity %i bump %i: velocity %f %f %f trace %f", ent - prog->edicts, bumpcount, ent->fields.server->velocity[0], ent->fields.server->velocity[1], ent->fields.server->velocity[2], trace.fraction);
823                 if (trace.fraction < 1)
824                         Con_Printf(" : %f %f %f", trace.plane.normal[0], trace.plane.normal[1], trace.plane.normal[2]);
825                 Con_Print("\n");
826 #endif
827
828 #if 0
829                 if (trace.bmodelstartsolid)
830                 {
831                         // LordHavoc: note: this code is what makes entities stick in place
832                         // if embedded in world only (you can walk through other objects if
833                         // stuck)
834                         // entity is trapped in another solid
835                         VectorClear(ent->fields.server->velocity);
836                         return 3;
837                 }
838 #endif
839
840                 // break if it moved the entire distance
841                 if (trace.fraction == 1)
842                 {
843                         VectorCopy(trace.endpos, ent->fields.server->origin);
844                         break;
845                 }
846
847                 if (!trace.ent)
848                 {
849                         Con_Printf ("SV_FlyMove: !trace.ent");
850                         trace.ent = prog->edicts;
851                 }
852
853                 impact = !((int) ent->fields.server->flags & FL_ONGROUND) || ent->fields.server->groundentity != PRVM_EDICT_TO_PROG(trace.ent);
854
855                 if (trace.plane.normal[2])
856                 {
857                         if (trace.plane.normal[2] > 0.7)
858                         {
859                                 // floor
860                                 blocked |= 1;
861                                 ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
862                                 ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
863                         }
864                 }
865                 else
866                 {
867                         // step
868                         blocked |= 2;
869                         // save the trace for player extrafriction
870                         if (stepnormal)
871                                 VectorCopy(trace.plane.normal, stepnormal);
872                 }
873
874                 if (trace.fraction >= 0.001)
875                 {
876                         // actually covered some distance
877                         VectorCopy(trace.endpos, ent->fields.server->origin);
878                         VectorCopy(ent->fields.server->velocity, original_velocity);
879                         numplanes = 0;
880                 }
881
882                 // run the impact function
883                 if (impact)
884                 {
885                         SV_Impact(ent, &trace);
886
887                         // break if removed by the impact function
888                         if (ent->priv.server->free)
889                                 break;
890                 }
891
892                 time_left *= 1 - trace.fraction;
893
894                 // clipped to another plane
895                 if (numplanes >= MAX_CLIP_PLANES)
896                 {
897                         // this shouldn't really happen
898                         VectorClear(ent->fields.server->velocity);
899                         blocked = 3;
900                         break;
901                 }
902
903                 /*
904                 for (i = 0;i < numplanes;i++)
905                         if (DotProduct(trace.plane.normal, planes[i]) > 0.99)
906                                 break;
907                 if (i < numplanes)
908                 {
909                         VectorAdd(ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity);
910                         continue;
911                 }
912                 */
913
914                 VectorCopy(trace.plane.normal, planes[numplanes]);
915                 numplanes++;
916
917                 if (sv_newflymove.integer)
918                         ClipVelocity(ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1);
919                 else
920                 {
921                         // modify original_velocity so it parallels all of the clip planes
922                         for (i = 0;i < numplanes;i++)
923                         {
924                                 ClipVelocity(original_velocity, planes[i], new_velocity, 1);
925                                 for (j = 0;j < numplanes;j++)
926                                 {
927                                         if (j != i)
928                                         {
929                                                 // not ok
930                                                 if (DotProduct(new_velocity, planes[j]) < 0)
931                                                         break;
932                                         }
933                                 }
934                                 if (j == numplanes)
935                                         break;
936                         }
937
938                         if (i != numplanes)
939                         {
940                                 // go along this plane
941                                 VectorCopy(new_velocity, ent->fields.server->velocity);
942                         }
943                         else
944                         {
945                                 // go along the crease
946                                 if (numplanes != 2)
947                                 {
948                                         VectorClear(ent->fields.server->velocity);
949                                         blocked = 7;
950                                         break;
951                                 }
952                                 CrossProduct(planes[0], planes[1], dir);
953                                 // LordHavoc: thanks to taniwha of QuakeForge for pointing out this fix for slowed falling in corners
954                                 VectorNormalize(dir);
955                                 d = DotProduct(dir, ent->fields.server->velocity);
956                                 VectorScale(dir, d, ent->fields.server->velocity);
957                         }
958                 }
959
960                 // if current velocity is against the original velocity,
961                 // stop dead to avoid tiny occilations in sloping corners
962                 if (DotProduct(ent->fields.server->velocity, primal_velocity) <= 0)
963                 {
964                         VectorClear(ent->fields.server->velocity);
965                         break;
966                 }
967         }
968
969         //Con_Printf("entity %i final: blocked %i velocity %f %f %f\n", ent - prog->edicts, blocked, ent->fields.server->velocity[0], ent->fields.server->velocity[1], ent->fields.server->velocity[2]);
970
971         /*
972         if ((blocked & 1) == 0 && bumpcount > 1)
973         {
974                 // LordHavoc: fix the 'fall to your death in a wedge corner' glitch
975                 // flag ONGROUND if there's ground under it
976                 trace = SV_Move(ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, MOVE_NORMAL, ent, hitsupercontentsmask);
977         }
978         */
979
980         // LordHavoc: this came from QW and allows you to get out of water more easily
981         if (sv_gameplayfix_easierwaterjump.integer && ((int)ent->fields.server->flags & FL_WATERJUMP))
982                 VectorCopy(primal_velocity, ent->fields.server->velocity);
983         return blocked;
984 }
985
986 /*
987 ============
988 SV_AddGravity
989
990 ============
991 */
992 void SV_AddGravity (prvm_edict_t *ent)
993 {
994         float ent_gravity;
995         prvm_eval_t *val;
996
997         val = PRVM_EDICTFIELDVALUE(ent, prog->fieldoffsets.gravity);
998         if (val!=0 && val->_float)
999                 ent_gravity = val->_float;
1000         else
1001                 ent_gravity = 1.0;
1002         ent->fields.server->velocity[2] -= ent_gravity * sv_gravity.value * sv.frametime;
1003 }
1004
1005
1006 /*
1007 ===============================================================================
1008
1009 PUSHMOVE
1010
1011 ===============================================================================
1012 */
1013
1014 /*
1015 ============
1016 SV_PushEntity
1017
1018 Does not change the entities velocity at all
1019 ============
1020 */
1021 static trace_t SV_PushEntity (prvm_edict_t *ent, vec3_t push, qboolean failonbmodelstartsolid)
1022 {
1023         int type;
1024         trace_t trace;
1025         vec3_t end;
1026
1027         VectorAdd (ent->fields.server->origin, push, end);
1028
1029         if (ent->fields.server->movetype == MOVETYPE_FLYMISSILE)
1030                 type = MOVE_MISSILE;
1031         else if (ent->fields.server->solid == SOLID_TRIGGER || ent->fields.server->solid == SOLID_NOT)
1032                 type = MOVE_NOMONSTERS; // only clip against bmodels
1033         else
1034                 type = MOVE_NORMAL;
1035
1036         trace = SV_Move (ent->fields.server->origin, ent->fields.server->mins, ent->fields.server->maxs, end, type, ent, SV_GenericHitSuperContentsMask(ent));
1037         if (trace.bmodelstartsolid && failonbmodelstartsolid)
1038                 return trace;
1039
1040         VectorCopy (trace.endpos, ent->fields.server->origin);
1041         SV_LinkEdict (ent, true);
1042
1043         if (ent->fields.server->solid >= SOLID_TRIGGER && trace.ent && (!((int)ent->fields.server->flags & FL_ONGROUND) || ent->fields.server->groundentity != PRVM_EDICT_TO_PROG(trace.ent)))
1044                 SV_Impact (ent, &trace);
1045         return trace;
1046 }
1047
1048
1049 /*
1050 ============
1051 SV_PushMove
1052
1053 ============
1054 */
1055 void SV_PushMove (prvm_edict_t *pusher, float movetime)
1056 {
1057         int i, e, index;
1058         float savesolid, movetime2, pushltime;
1059         vec3_t mins, maxs, move, move1, moveangle, pushorig, pushang, a, forward, left, up, org;
1060         int num_moved;
1061         int numcheckentities;
1062         static prvm_edict_t *checkentities[MAX_EDICTS];
1063         model_t *pushermodel;
1064         trace_t trace;
1065         matrix4x4_t pusherfinalmatrix, pusherfinalimatrix;
1066         unsigned short moved_edicts[MAX_EDICTS];
1067
1068         if (!pusher->fields.server->velocity[0] && !pusher->fields.server->velocity[1] && !pusher->fields.server->velocity[2] && !pusher->fields.server->avelocity[0] && !pusher->fields.server->avelocity[1] && !pusher->fields.server->avelocity[2])
1069         {
1070                 pusher->fields.server->ltime += movetime;
1071                 return;
1072         }
1073
1074         switch ((int) pusher->fields.server->solid)
1075         {
1076         // LordHavoc: valid pusher types
1077         case SOLID_BSP:
1078         case SOLID_BBOX:
1079         case SOLID_SLIDEBOX:
1080         case SOLID_CORPSE: // LordHavoc: this would be weird...
1081                 break;
1082         // LordHavoc: no collisions
1083         case SOLID_NOT:
1084         case SOLID_TRIGGER:
1085                 VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1086                 VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1087                 pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1088                 pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1089                 pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1090                 pusher->fields.server->ltime += movetime;
1091                 SV_LinkEdict (pusher, false);
1092                 return;
1093         default:
1094                 Con_Printf("SV_PushMove: entity #%i, unrecognized solid type %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->solid);
1095                 return;
1096         }
1097         index = (int) pusher->fields.server->modelindex;
1098         if (index < 1 || index >= MAX_MODELS)
1099         {
1100                 Con_Printf("SV_PushMove: entity #%i has an invalid modelindex %f\n", PRVM_NUM_FOR_EDICT(pusher), pusher->fields.server->modelindex);
1101                 return;
1102         }
1103         pushermodel = sv.models[index];
1104
1105         movetime2 = movetime;
1106         VectorScale(pusher->fields.server->velocity, movetime2, move1);
1107         VectorScale(pusher->fields.server->avelocity, movetime2, moveangle);
1108         if (moveangle[0] || moveangle[2])
1109         {
1110                 for (i = 0;i < 3;i++)
1111                 {
1112                         if (move1[i] > 0)
1113                         {
1114                                 mins[i] = pushermodel->rotatedmins[i] + pusher->fields.server->origin[i] - 1;
1115                                 maxs[i] = pushermodel->rotatedmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1116                         }
1117                         else
1118                         {
1119                                 mins[i] = pushermodel->rotatedmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1120                                 maxs[i] = pushermodel->rotatedmaxs[i] + pusher->fields.server->origin[i] + 1;
1121                         }
1122                 }
1123         }
1124         else if (moveangle[1])
1125         {
1126                 for (i = 0;i < 3;i++)
1127                 {
1128                         if (move1[i] > 0)
1129                         {
1130                                 mins[i] = pushermodel->yawmins[i] + pusher->fields.server->origin[i] - 1;
1131                                 maxs[i] = pushermodel->yawmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1132                         }
1133                         else
1134                         {
1135                                 mins[i] = pushermodel->yawmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1136                                 maxs[i] = pushermodel->yawmaxs[i] + pusher->fields.server->origin[i] + 1;
1137                         }
1138                 }
1139         }
1140         else
1141         {
1142                 for (i = 0;i < 3;i++)
1143                 {
1144                         if (move1[i] > 0)
1145                         {
1146                                 mins[i] = pushermodel->normalmins[i] + pusher->fields.server->origin[i] - 1;
1147                                 maxs[i] = pushermodel->normalmaxs[i] + move1[i] + pusher->fields.server->origin[i] + 1;
1148                         }
1149                         else
1150                         {
1151                                 mins[i] = pushermodel->normalmins[i] + move1[i] + pusher->fields.server->origin[i] - 1;
1152                                 maxs[i] = pushermodel->normalmaxs[i] + pusher->fields.server->origin[i] + 1;
1153                         }
1154                 }
1155         }
1156
1157         VectorNegate (moveangle, a);
1158         AngleVectorsFLU (a, forward, left, up);
1159
1160         VectorCopy (pusher->fields.server->origin, pushorig);
1161         VectorCopy (pusher->fields.server->angles, pushang);
1162         pushltime = pusher->fields.server->ltime;
1163
1164 // move the pusher to its final position
1165
1166         VectorMA (pusher->fields.server->origin, movetime, pusher->fields.server->velocity, pusher->fields.server->origin);
1167         VectorMA (pusher->fields.server->angles, movetime, pusher->fields.server->avelocity, pusher->fields.server->angles);
1168         pusher->fields.server->ltime += movetime;
1169         SV_LinkEdict (pusher, false);
1170
1171         pushermodel = NULL;
1172         if (pusher->fields.server->modelindex >= 1 && pusher->fields.server->modelindex < MAX_MODELS)
1173                 pushermodel = sv.models[(int)pusher->fields.server->modelindex];
1174         Matrix4x4_CreateFromQuakeEntity(&pusherfinalmatrix, pusher->fields.server->origin[0], pusher->fields.server->origin[1], pusher->fields.server->origin[2], pusher->fields.server->angles[0], pusher->fields.server->angles[1], pusher->fields.server->angles[2], 1);
1175         Matrix4x4_Invert_Simple(&pusherfinalimatrix, &pusherfinalmatrix);
1176
1177         savesolid = pusher->fields.server->solid;
1178
1179 // see if any solid entities are inside the final position
1180         num_moved = 0;
1181
1182         numcheckentities = World_EntitiesInBox(&sv.world, mins, maxs, MAX_EDICTS, checkentities);
1183         for (e = 0;e < numcheckentities;e++)
1184         {
1185                 prvm_edict_t *check = checkentities[e];
1186                 int checkcontents = SV_GenericHitSuperContentsMask(check);
1187                 if (check->fields.server->movetype == MOVETYPE_NONE
1188                  || check->fields.server->movetype == MOVETYPE_PUSH
1189                  || check->fields.server->movetype == MOVETYPE_FOLLOW
1190                  || check->fields.server->movetype == MOVETYPE_NOCLIP
1191                  || check->fields.server->movetype == MOVETYPE_FAKEPUSH)
1192                         continue;
1193
1194                 // tell any MOVETYPE_STEP entity that it may need to check for water transitions
1195                 check->priv.server->waterposition_forceupdate = true;
1196
1197                 // if the entity is standing on the pusher, it will definitely be moved
1198                 // if the entity is not standing on the pusher, but is in the pusher's
1199                 // final position, move it
1200                 if (!((int)check->fields.server->flags & FL_ONGROUND) || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher)
1201                 {
1202                         Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1203                         if (!trace.startsolid)
1204                                 continue;
1205                 }
1206
1207
1208                 if (forward[0] != 1 || left[1] != 1) // quick way to check if any rotation is used
1209                 {
1210                         vec3_t org2;
1211                         VectorSubtract (check->fields.server->origin, pusher->fields.server->origin, org);
1212                         org2[0] = DotProduct (org, forward);
1213                         org2[1] = DotProduct (org, left);
1214                         org2[2] = DotProduct (org, up);
1215                         VectorSubtract (org2, org, move);
1216                         VectorAdd (move, move1, move);
1217                 }
1218                 else
1219                         VectorCopy (move1, move);
1220
1221                 VectorCopy (check->fields.server->origin, check->priv.server->moved_from);
1222                 VectorCopy (check->fields.server->angles, check->priv.server->moved_fromangles);
1223                 moved_edicts[num_moved++] = PRVM_NUM_FOR_EDICT(check);
1224
1225                 // try moving the contacted entity
1226                 pusher->fields.server->solid = SOLID_NOT;
1227                 trace = SV_PushEntity (check, move, true);
1228                 // FIXME: turn players specially
1229                 check->fields.server->angles[1] += trace.fraction * moveangle[1];
1230                 pusher->fields.server->solid = savesolid; // was SOLID_BSP
1231                 //Con_Printf("%s:%d frac %f startsolid %d bmodelstartsolid %d allsolid %d\n", __FILE__, __LINE__, trace.fraction, trace.startsolid, trace.bmodelstartsolid, trace.allsolid);
1232
1233                 // this trace.fraction < 1 check causes items to fall off of pushers
1234                 // if they pass under or through a wall
1235                 // the groundentity check causes items to fall off of ledges
1236                 if (check->fields.server->movetype != MOVETYPE_WALK && (trace.fraction < 1 || PRVM_PROG_TO_EDICT(check->fields.server->groundentity) != pusher))
1237                         check->fields.server->flags = (int)check->fields.server->flags & ~FL_ONGROUND;
1238
1239                 // if it is still inside the pusher, block
1240                 Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1241                 if (trace.startsolid)
1242                 {
1243                         // try moving the contacted entity a tiny bit further to account for precision errors
1244                         vec3_t move2;
1245                         pusher->fields.server->solid = SOLID_NOT;
1246                         VectorScale(move, 1.1, move2);
1247                         VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1248                         VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1249                         SV_PushEntity (check, move2, true);
1250                         pusher->fields.server->solid = savesolid;
1251                         Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1252                         if (trace.startsolid)
1253                         {
1254                                 // try moving the contacted entity a tiny bit less to account for precision errors
1255                                 pusher->fields.server->solid = SOLID_NOT;
1256                                 VectorScale(move, 0.9, move2);
1257                                 VectorCopy (check->priv.server->moved_from, check->fields.server->origin);
1258                                 VectorCopy (check->priv.server->moved_fromangles, check->fields.server->angles);
1259                                 SV_PushEntity (check, move2, true);
1260                                 pusher->fields.server->solid = savesolid;
1261                                 Collision_ClipToGenericEntity(&trace, pushermodel, pusher->fields.server->frame, pusher->fields.server->mins, pusher->fields.server->maxs, SUPERCONTENTS_BODY, &pusherfinalmatrix, &pusherfinalimatrix, check->fields.server->origin, check->fields.server->mins, check->fields.server->maxs, check->fields.server->origin, checkcontents);
1262                                 if (trace.startsolid)
1263                                 {
1264                                         // still inside pusher, so it's really blocked
1265
1266                                         // fail the move
1267                                         if (check->fields.server->mins[0] == check->fields.server->maxs[0])
1268                                                 continue;
1269                                         if (check->fields.server->solid == SOLID_NOT || check->fields.server->solid == SOLID_TRIGGER)
1270                                         {
1271                                                 // corpse
1272                                                 check->fields.server->mins[0] = check->fields.server->mins[1] = 0;
1273                                                 VectorCopy (check->fields.server->mins, check->fields.server->maxs);
1274                                                 continue;
1275                                         }
1276
1277                                         VectorCopy (pushorig, pusher->fields.server->origin);
1278                                         VectorCopy (pushang, pusher->fields.server->angles);
1279                                         pusher->fields.server->ltime = pushltime;
1280                                         SV_LinkEdict (pusher, false);
1281
1282                                         // move back any entities we already moved
1283                                         for (i = 0;i < num_moved;i++)
1284                                         {
1285                                                 prvm_edict_t *ed = PRVM_EDICT_NUM(moved_edicts[i]);
1286                                                 VectorCopy (ed->priv.server->moved_from, ed->fields.server->origin);
1287                                                 VectorCopy (ed->priv.server->moved_fromangles, ed->fields.server->angles);
1288                                                 SV_LinkEdict (ed, false);
1289                                         }
1290
1291                                         // if the pusher has a "blocked" function, call it, otherwise just stay in place until the obstacle is gone
1292                                         if (pusher->fields.server->blocked)
1293                                         {
1294                                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(pusher);
1295                                                 prog->globals.server->other = PRVM_EDICT_TO_PROG(check);
1296                                                 PRVM_ExecuteProgram (pusher->fields.server->blocked, "QC function self.blocked is missing");
1297                                         }
1298                                         break;
1299                                 }
1300                         }
1301                 }
1302         }
1303         pusher->fields.server->angles[0] -= 360.0 * floor(pusher->fields.server->angles[0] * (1.0 / 360.0));
1304         pusher->fields.server->angles[1] -= 360.0 * floor(pusher->fields.server->angles[1] * (1.0 / 360.0));
1305         pusher->fields.server->angles[2] -= 360.0 * floor(pusher->fields.server->angles[2] * (1.0 / 360.0));
1306 }
1307
1308 /*
1309 ================
1310 SV_Physics_Pusher
1311
1312 ================
1313 */
1314 void SV_Physics_Pusher (prvm_edict_t *ent)
1315 {
1316         float thinktime, oldltime, movetime;
1317
1318         oldltime = ent->fields.server->ltime;
1319
1320         thinktime = ent->fields.server->nextthink;
1321         if (thinktime < ent->fields.server->ltime + sv.frametime)
1322         {
1323                 movetime = thinktime - ent->fields.server->ltime;
1324                 if (movetime < 0)
1325                         movetime = 0;
1326         }
1327         else
1328                 movetime = sv.frametime;
1329
1330         if (movetime)
1331                 // advances ent->fields.server->ltime if not blocked
1332                 SV_PushMove (ent, movetime);
1333
1334         if (thinktime > oldltime && thinktime <= ent->fields.server->ltime)
1335         {
1336                 ent->fields.server->nextthink = 0;
1337                 prog->globals.server->time = sv.time;
1338                 prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
1339                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
1340                 PRVM_ExecuteProgram (ent->fields.server->think, "QC function self.think is missing");
1341         }
1342 }
1343
1344
1345 /*
1346 ===============================================================================
1347
1348 CLIENT MOVEMENT
1349
1350 ===============================================================================
1351 */
1352
1353 static float unstickoffsets[] =
1354 {
1355         -1,  0,  0,
1356          1,  0,  0,
1357          0, -1,  0,
1358          0,  1,  0,
1359         -1, -1,  0,
1360          1, -1,  0,
1361         -1,  1,  0,
1362          1,  1,  0,
1363          0,  0,  -1,
1364          0,  0,  1,
1365          0,  0,  2,
1366          0,  0,  3,
1367          0,  0,  4,
1368          0,  0,  5,
1369          0,  0,  6,
1370          0,  0,  7,
1371          0,  0,  8,
1372          0,  0,  9,
1373          0,  0,  10,
1374          0,  0,  11,
1375          0,  0,  12,
1376          0,  0,  13,
1377          0,  0,  14,
1378          0,  0,  15,
1379          0,  0,  16,
1380          0,  0,  17,
1381 };
1382
1383 /*
1384 =============
1385 SV_CheckStuck
1386
1387 This is a big hack to try and fix the rare case of getting stuck in the world
1388 clipping hull.
1389 =============
1390 */
1391 void SV_CheckStuck (prvm_edict_t *ent)
1392 {
1393         int i;
1394         vec3_t offset;
1395
1396         if (!SV_TestEntityPosition(ent, vec3_origin))
1397         {
1398                 VectorCopy (ent->fields.server->origin, ent->fields.server->oldorigin);
1399                 return;
1400         }
1401
1402         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1403         {
1404                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1405                 {
1406                         Con_DPrintf("Unstuck player entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname), unstickoffsets[i+0], unstickoffsets[i+1], unstickoffsets[i+2]);
1407                         SV_LinkEdict (ent, true);
1408                         return;
1409                 }
1410         }
1411
1412         VectorSubtract(ent->fields.server->oldorigin, ent->fields.server->origin, offset);
1413         if (!SV_TestEntityPosition(ent, offset))
1414         {
1415                 Con_DPrintf("Unstuck player entity %i (classname \"%s\") by restoring oldorigin.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1416                 SV_LinkEdict (ent, true);
1417                 return;
1418         }
1419
1420         Con_DPrintf("Stuck player entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1421 }
1422
1423 static void SV_UnstickEntity (prvm_edict_t *ent)
1424 {
1425         int i;
1426
1427         // if not stuck in a bmodel, just return
1428         if (!SV_TestEntityPosition(ent, vec3_origin))
1429                 return;
1430
1431         for (i = 0;i < (int)(sizeof(unstickoffsets) / sizeof(unstickoffsets[0]));i += 3)
1432         {
1433                 if (!SV_TestEntityPosition(ent, unstickoffsets + i))
1434                 {
1435                         Con_DPrintf("Unstuck entity %i (classname \"%s\") with offset %f %f %f.\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname), unstickoffsets[i+0], unstickoffsets[i+1], unstickoffsets[i+2]);
1436                         SV_LinkEdict (ent, true);
1437                         return;
1438                 }
1439         }
1440
1441         if (developer.integer >= 100)
1442                 Con_Printf("Stuck entity %i (classname \"%s\").\n", (int)PRVM_EDICT_TO_PROG(ent), PRVM_GetString(ent->fields.server->classname));
1443 }
1444
1445
1446 /*
1447 =============
1448 SV_CheckWater
1449 =============
1450 */
1451 qboolean SV_CheckWater (prvm_edict_t *ent)
1452 {
1453         int cont;
1454         int nNativeContents;
1455         vec3_t point;
1456
1457         point[0] = ent->fields.server->origin[0];
1458         point[1] = ent->fields.server->origin[1];
1459         point[2] = ent->fields.server->origin[2] + ent->fields.server->mins[2] + 1;
1460
1461         // DRESK - Support for Entity Contents Transition Event
1462         // NOTE: Some logic needed to be slightly re-ordered
1463         // to not affect performance and allow for the feature.
1464
1465         // Acquire Super Contents Prior to Resets
1466         cont = SV_PointSuperContents(point);
1467         // Acquire Native Contents Here
1468         nNativeContents = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, cont);
1469
1470         // DRESK - Support for Entity Contents Transition Event
1471         if(ent->fields.server->watertype)
1472                 // Entity did NOT Spawn; Check
1473                 SV_CheckContentsTransition(ent, nNativeContents);
1474
1475
1476         ent->fields.server->waterlevel = 0;
1477         ent->fields.server->watertype = CONTENTS_EMPTY;
1478         cont = SV_PointSuperContents(point);
1479         if (cont & (SUPERCONTENTS_LIQUIDSMASK))
1480         {
1481                 ent->fields.server->watertype = nNativeContents;
1482                 ent->fields.server->waterlevel = 1;
1483                 point[2] = ent->fields.server->origin[2] + (ent->fields.server->mins[2] + ent->fields.server->maxs[2])*0.5;
1484                 if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1485                 {
1486                         ent->fields.server->waterlevel = 2;
1487                         point[2] = ent->fields.server->origin[2] + ent->fields.server->view_ofs[2];
1488                         if (SV_PointSuperContents(point) & (SUPERCONTENTS_LIQUIDSMASK))
1489                                 ent->fields.server->waterlevel = 3;
1490                 }
1491         }
1492
1493         return ent->fields.server->waterlevel > 1;
1494 }
1495
1496 /*
1497 ============
1498 SV_WallFriction
1499
1500 ============
1501 */
1502 void SV_WallFriction (prvm_edict_t *ent, float *stepnormal)
1503 {
1504         float d, i;
1505         vec3_t forward, into, side;
1506
1507         AngleVectors (ent->fields.server->v_angle, forward, NULL, NULL);
1508         if ((d = DotProduct (stepnormal, forward) + 0.5) < 0)
1509         {
1510                 // cut the tangential velocity
1511                 i = DotProduct (stepnormal, ent->fields.server->velocity);
1512                 VectorScale (stepnormal, i, into);
1513                 VectorSubtract (ent->fields.server->velocity, into, side);
1514                 ent->fields.server->velocity[0] = side[0] * (1 + d);
1515                 ent->fields.server->velocity[1] = side[1] * (1 + d);
1516         }
1517 }
1518
1519 #if 0
1520 /*
1521 =====================
1522 SV_TryUnstick
1523
1524 Player has come to a dead stop, possibly due to the problem with limited
1525 float precision at some angle joins in the BSP hull.
1526
1527 Try fixing by pushing one pixel in each direction.
1528
1529 This is a hack, but in the interest of good gameplay...
1530 ======================
1531 */
1532 int SV_TryUnstick (prvm_edict_t *ent, vec3_t oldvel)
1533 {
1534         int i, clip;
1535         vec3_t oldorg, dir;
1536
1537         VectorCopy (ent->fields.server->origin, oldorg);
1538         VectorClear (dir);
1539
1540         for (i=0 ; i<8 ; i++)
1541         {
1542                 // try pushing a little in an axial direction
1543                 switch (i)
1544                 {
1545                         case 0: dir[0] = 2; dir[1] = 0; break;
1546                         case 1: dir[0] = 0; dir[1] = 2; break;
1547                         case 2: dir[0] = -2; dir[1] = 0; break;
1548                         case 3: dir[0] = 0; dir[1] = -2; break;
1549                         case 4: dir[0] = 2; dir[1] = 2; break;
1550                         case 5: dir[0] = -2; dir[1] = 2; break;
1551                         case 6: dir[0] = 2; dir[1] = -2; break;
1552                         case 7: dir[0] = -2; dir[1] = -2; break;
1553                 }
1554
1555                 SV_PushEntity (ent, dir, false);
1556
1557                 // retry the original move
1558                 ent->fields.server->velocity[0] = oldvel[0];
1559                 ent->fields.server->velocity[1] = oldvel[1];
1560                 ent->fields.server->velocity[2] = 0;
1561                 clip = SV_FlyMove (ent, 0.1, NULL, SV_GenericHitSuperContentsMask(ent));
1562
1563                 if (fabs(oldorg[1] - ent->fields.server->origin[1]) > 4
1564                  || fabs(oldorg[0] - ent->fields.server->origin[0]) > 4)
1565                 {
1566                         Con_DPrint("TryUnstick - success.\n");
1567                         return clip;
1568                 }
1569
1570                 // go back to the original pos and try again
1571                 VectorCopy (oldorg, ent->fields.server->origin);
1572         }
1573
1574         // still not moving
1575         VectorClear (ent->fields.server->velocity);
1576         Con_DPrint("TryUnstick - failure.\n");
1577         return 7;
1578 }
1579 #endif
1580
1581 /*
1582 =====================
1583 SV_WalkMove
1584
1585 Only used by players
1586 ======================
1587 */
1588 void SV_WalkMove (prvm_edict_t *ent)
1589 {
1590         int clip, oldonground, originalmove_clip, originalmove_flags, originalmove_groundentity, hitsupercontentsmask;
1591         vec3_t upmove, downmove, start_origin, start_velocity, stepnormal, originalmove_origin, originalmove_velocity;
1592         trace_t downtrace;
1593
1594         // if frametime is 0 (due to client sending the same timestamp twice),
1595         // don't move
1596         if (sv.frametime <= 0)
1597                 return;
1598
1599         hitsupercontentsmask = SV_GenericHitSuperContentsMask(ent);
1600
1601         SV_CheckVelocity(ent);
1602
1603         // do a regular slide move unless it looks like you ran into a step
1604         oldonground = (int)ent->fields.server->flags & FL_ONGROUND;
1605
1606         VectorCopy (ent->fields.server->origin, start_origin);
1607         VectorCopy (ent->fields.server->velocity, start_velocity);
1608
1609         clip = SV_FlyMove (ent, sv.frametime, NULL, hitsupercontentsmask);
1610
1611         // if the move did not hit the ground at any point, we're not on ground
1612         if (!(clip & 1))
1613                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1614
1615         SV_CheckVelocity(ent);
1616
1617         VectorCopy(ent->fields.server->origin, originalmove_origin);
1618         VectorCopy(ent->fields.server->velocity, originalmove_velocity);
1619         originalmove_clip = clip;
1620         originalmove_flags = (int)ent->fields.server->flags;
1621         originalmove_groundentity = ent->fields.server->groundentity;
1622
1623         if ((int)ent->fields.server->flags & FL_WATERJUMP)
1624                 return;
1625
1626         if (sv_nostep.integer)
1627                 return;
1628
1629         // if move didn't block on a step, return
1630         if (clip & 2)
1631         {
1632                 // if move was not trying to move into the step, return
1633                 if (fabs(start_velocity[0]) < 0.03125 && fabs(start_velocity[1]) < 0.03125)
1634                         return;
1635
1636                 if (ent->fields.server->movetype != MOVETYPE_FLY)
1637                 {
1638                         // return if gibbed by a trigger
1639                         if (ent->fields.server->movetype != MOVETYPE_WALK)
1640                                 return;
1641
1642                         // only step up while jumping if that is enabled
1643                         if (!(sv_jumpstep.integer && sv_gameplayfix_stepwhilejumping.integer))
1644                                 if (!oldonground && ent->fields.server->waterlevel == 0)
1645                                         return;
1646                 }
1647
1648                 // try moving up and forward to go up a step
1649                 // back to start pos
1650                 VectorCopy (start_origin, ent->fields.server->origin);
1651                 VectorCopy (start_velocity, ent->fields.server->velocity);
1652
1653                 // move up
1654                 VectorClear (upmove);
1655                 upmove[2] = sv_stepheight.value;
1656                 // FIXME: don't link?
1657                 SV_PushEntity(ent, upmove, false);
1658
1659                 // move forward
1660                 ent->fields.server->velocity[2] = 0;
1661                 clip = SV_FlyMove (ent, sv.frametime, stepnormal, hitsupercontentsmask);
1662                 ent->fields.server->velocity[2] += start_velocity[2];
1663
1664                 SV_CheckVelocity(ent);
1665
1666                 // check for stuckness, possibly due to the limited precision of floats
1667                 // in the clipping hulls
1668                 if (clip
1669                  && fabs(originalmove_origin[1] - ent->fields.server->origin[1]) < 0.03125
1670                  && fabs(originalmove_origin[0] - ent->fields.server->origin[0]) < 0.03125)
1671                 {
1672                         //Con_Printf("wall\n");
1673                         // stepping up didn't make any progress, revert to original move
1674                         VectorCopy(originalmove_origin, ent->fields.server->origin);
1675                         VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1676                         //clip = originalmove_clip;
1677                         ent->fields.server->flags = originalmove_flags;
1678                         ent->fields.server->groundentity = originalmove_groundentity;
1679                         // now try to unstick if needed
1680                         //clip = SV_TryUnstick (ent, oldvel);
1681                         return;
1682                 }
1683
1684                 //Con_Printf("step - ");
1685
1686                 // extra friction based on view angle
1687                 if (clip & 2 && sv_wallfriction.integer)
1688                         SV_WallFriction (ent, stepnormal);
1689         }
1690         // don't do the down move if stepdown is disabled, moving upward, not in water, or the move started offground or ended onground
1691         else if (!sv_gameplayfix_stepdown.integer || ent->fields.server->waterlevel >= 3 || start_velocity[2] >= (1.0 / 32.0) || !oldonground || ((int)ent->fields.server->flags & FL_ONGROUND))
1692                 return;
1693
1694         // move down
1695         VectorClear (downmove);
1696         downmove[2] = -sv_stepheight.value + start_velocity[2]*sv.frametime;
1697         // FIXME: don't link?
1698         downtrace = SV_PushEntity (ent, downmove, false);
1699
1700         if (downtrace.fraction < 1 && downtrace.plane.normal[2] > 0.7)
1701         {
1702                 // this has been disabled so that you can't jump when you are stepping
1703                 // up while already jumping (also known as the Quake2 double jump bug)
1704 #if 0
1705                 // LordHavoc: disabled this check so you can walk on monsters/players
1706                 //if (ent->fields.server->solid == SOLID_BSP)
1707                 {
1708                         //Con_Printf("onground\n");
1709                         ent->fields.server->flags =     (int)ent->fields.server->flags | FL_ONGROUND;
1710                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(downtrace.ent);
1711                 }
1712 #endif
1713         }
1714         else
1715         {
1716                 //Con_Printf("slope\n");
1717                 // if the push down didn't end up on good ground, use the move without
1718                 // the step up.  This happens near wall / slope combinations, and can
1719                 // cause the player to hop up higher on a slope too steep to climb
1720                 VectorCopy(originalmove_origin, ent->fields.server->origin);
1721                 VectorCopy(originalmove_velocity, ent->fields.server->velocity);
1722                 //clip = originalmove_clip;
1723                 ent->fields.server->flags = originalmove_flags;
1724                 ent->fields.server->groundentity = originalmove_groundentity;
1725         }
1726
1727         SV_CheckVelocity(ent);
1728 }
1729
1730 //============================================================================
1731
1732 /*
1733 =============
1734 SV_Physics_Follow
1735
1736 Entities that are "stuck" to another entity
1737 =============
1738 */
1739 void SV_Physics_Follow (prvm_edict_t *ent)
1740 {
1741         vec3_t vf, vr, vu, angles, v;
1742         prvm_edict_t *e;
1743
1744         // regular thinking
1745         if (!SV_RunThink (ent))
1746                 return;
1747
1748         // LordHavoc: implemented rotation on MOVETYPE_FOLLOW objects
1749         e = PRVM_PROG_TO_EDICT(ent->fields.server->aiment);
1750         if (e->fields.server->angles[0] == ent->fields.server->punchangle[0] && e->fields.server->angles[1] == ent->fields.server->punchangle[1] && e->fields.server->angles[2] == ent->fields.server->punchangle[2])
1751         {
1752                 // quick case for no rotation
1753                 VectorAdd(e->fields.server->origin, ent->fields.server->view_ofs, ent->fields.server->origin);
1754         }
1755         else
1756         {
1757                 angles[0] = -ent->fields.server->punchangle[0];
1758                 angles[1] =  ent->fields.server->punchangle[1];
1759                 angles[2] =  ent->fields.server->punchangle[2];
1760                 AngleVectors (angles, vf, vr, vu);
1761                 v[0] = ent->fields.server->view_ofs[0] * vf[0] + ent->fields.server->view_ofs[1] * vr[0] + ent->fields.server->view_ofs[2] * vu[0];
1762                 v[1] = ent->fields.server->view_ofs[0] * vf[1] + ent->fields.server->view_ofs[1] * vr[1] + ent->fields.server->view_ofs[2] * vu[1];
1763                 v[2] = ent->fields.server->view_ofs[0] * vf[2] + ent->fields.server->view_ofs[1] * vr[2] + ent->fields.server->view_ofs[2] * vu[2];
1764                 angles[0] = -e->fields.server->angles[0];
1765                 angles[1] =  e->fields.server->angles[1];
1766                 angles[2] =  e->fields.server->angles[2];
1767                 AngleVectors (angles, vf, vr, vu);
1768                 ent->fields.server->origin[0] = v[0] * vf[0] + v[1] * vf[1] + v[2] * vf[2] + e->fields.server->origin[0];
1769                 ent->fields.server->origin[1] = v[0] * vr[0] + v[1] * vr[1] + v[2] * vr[2] + e->fields.server->origin[1];
1770                 ent->fields.server->origin[2] = v[0] * vu[0] + v[1] * vu[1] + v[2] * vu[2] + e->fields.server->origin[2];
1771         }
1772         VectorAdd (e->fields.server->angles, ent->fields.server->v_angle, ent->fields.server->angles);
1773         SV_LinkEdict (ent, true);
1774 }
1775
1776 /*
1777 ==============================================================================
1778
1779 TOSS / BOUNCE
1780
1781 ==============================================================================
1782 */
1783
1784 /*
1785 =============
1786 SV_CheckWaterTransition
1787
1788 =============
1789 */
1790 void SV_CheckWaterTransition (prvm_edict_t *ent)
1791 {
1792         int cont;
1793         cont = Mod_Q1BSP_NativeContentsFromSuperContents(NULL, SV_PointSuperContents(ent->fields.server->origin));
1794         if (!ent->fields.server->watertype)
1795         {
1796                 // just spawned here
1797                 ent->fields.server->watertype = cont;
1798                 ent->fields.server->waterlevel = 1;
1799                 return;
1800         }
1801
1802         // DRESK - Support for Entity Contents Transition Event
1803         // NOTE: Call here BEFORE updating the watertype below,
1804         // and suppress watersplash sound if a valid function
1805         // call was made to allow for custom "splash" sounds.
1806         if( !SV_CheckContentsTransition(ent, cont) )
1807         { // Contents Transition Function Invalid; Potentially Play Water Sound
1808                 // check if the entity crossed into or out of water
1809                 if (sv_sound_watersplash.string && ((ent->fields.server->watertype == CONTENTS_WATER || ent->fields.server->watertype == CONTENTS_SLIME) != (cont == CONTENTS_WATER || cont == CONTENTS_SLIME)))
1810                         SV_StartSound (ent, 0, sv_sound_watersplash.string, 255, 1);
1811         }
1812
1813         if (cont <= CONTENTS_WATER)
1814         {
1815                 ent->fields.server->watertype = cont;
1816                 ent->fields.server->waterlevel = 1;
1817         }
1818         else
1819         {
1820                 ent->fields.server->watertype = CONTENTS_EMPTY;
1821                 ent->fields.server->waterlevel = 0;
1822         }
1823 }
1824
1825 /*
1826 =============
1827 SV_Physics_Toss
1828
1829 Toss, bounce, and fly movement.  When onground, do nothing.
1830 =============
1831 */
1832 void SV_Physics_Toss (prvm_edict_t *ent)
1833 {
1834         trace_t trace;
1835         vec3_t move;
1836
1837 // if onground, return without moving
1838         if ((int)ent->fields.server->flags & FL_ONGROUND)
1839         {
1840                 if (ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer)
1841                 {
1842                         // don't stick to ground if onground and moving upward
1843                         ent->fields.server->flags -= FL_ONGROUND;
1844                 }
1845                 else if (!ent->fields.server->groundentity || !sv_gameplayfix_noairborncorpse.integer)
1846                 {
1847                         // we can trust FL_ONGROUND if groundentity is world because it never moves
1848                         return;
1849                 }
1850                 else if (ent->priv.server->suspendedinairflag && PRVM_PROG_TO_EDICT(ent->fields.server->groundentity)->priv.server->free)
1851                 {
1852                         // if ent was supported by a brush model on previous frame,
1853                         // and groundentity is now freed, set groundentity to 0 (world)
1854                         // which leaves it suspended in the air
1855                         ent->fields.server->groundentity = 0;
1856                         return;
1857                 }
1858         }
1859         ent->priv.server->suspendedinairflag = false;
1860
1861         SV_CheckVelocity (ent);
1862
1863 // add gravity
1864         if (ent->fields.server->movetype == MOVETYPE_TOSS || ent->fields.server->movetype == MOVETYPE_BOUNCE)
1865                 SV_AddGravity (ent);
1866
1867 // move angles
1868         VectorMA (ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
1869
1870 // move origin
1871         VectorScale (ent->fields.server->velocity, sv.frametime, move);
1872         trace = SV_PushEntity (ent, move, true);
1873         if (ent->priv.server->free)
1874                 return;
1875         if (trace.bmodelstartsolid)
1876         {
1877                 // try to unstick the entity
1878                 SV_UnstickEntity(ent);
1879                 trace = SV_PushEntity (ent, move, false);
1880                 if (ent->priv.server->free)
1881                         return;
1882         }
1883
1884         if (trace.fraction < 1)
1885         {
1886                 if (ent->fields.server->movetype == MOVETYPE_BOUNCEMISSILE)
1887                 {
1888                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 2.0);
1889                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1890                 }
1891                 else if (ent->fields.server->movetype == MOVETYPE_BOUNCE)
1892                 {
1893                         float d;
1894                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.5);
1895                         // LordHavoc: fixed grenades not bouncing when fired down a slope
1896                         if (sv_gameplayfix_grenadebouncedownslopes.integer)
1897                         {
1898                                 d = DotProduct(trace.plane.normal, ent->fields.server->velocity);
1899                                 if (trace.plane.normal[2] > 0.7 && fabs(d) < 60)
1900                                 {
1901                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1902                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1903                                         VectorClear (ent->fields.server->velocity);
1904                                         VectorClear (ent->fields.server->avelocity);
1905                                 }
1906                                 else
1907                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1908                         }
1909                         else
1910                         {
1911                                 if (trace.plane.normal[2] > 0.7 && ent->fields.server->velocity[2] < 60)
1912                                 {
1913                                         ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1914                                         ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1915                                         VectorClear (ent->fields.server->velocity);
1916                                         VectorClear (ent->fields.server->avelocity);
1917                                 }
1918                                 else
1919                                         ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1920                         }
1921                 }
1922                 else
1923                 {
1924                         ClipVelocity (ent->fields.server->velocity, trace.plane.normal, ent->fields.server->velocity, 1.0);
1925                         if (trace.plane.normal[2] > 0.7)
1926                         {
1927                                 ent->fields.server->flags = (int)ent->fields.server->flags | FL_ONGROUND;
1928                                 ent->fields.server->groundentity = PRVM_EDICT_TO_PROG(trace.ent);
1929                                 if (((prvm_edict_t *)trace.ent)->fields.server->solid == SOLID_BSP)
1930                                         ent->priv.server->suspendedinairflag = true;
1931                                 VectorClear (ent->fields.server->velocity);
1932                                 VectorClear (ent->fields.server->avelocity);
1933                         }
1934                         else
1935                                 ent->fields.server->flags = (int)ent->fields.server->flags & ~FL_ONGROUND;
1936                 }
1937         }
1938
1939 // check for in water
1940         SV_CheckWaterTransition (ent);
1941 }
1942
1943 /*
1944 ===============================================================================
1945
1946 STEPPING MOVEMENT
1947
1948 ===============================================================================
1949 */
1950
1951 /*
1952 =============
1953 SV_Physics_Step
1954
1955 Monsters freefall when they don't have a ground entity, otherwise
1956 all movement is done with discrete steps.
1957
1958 This is also used for objects that have become still on the ground, but
1959 will fall if the floor is pulled out from under them.
1960 =============
1961 */
1962 void SV_Physics_Step (prvm_edict_t *ent)
1963 {
1964         int flags = (int)ent->fields.server->flags;
1965         // don't fall at all if fly/swim
1966         if (!(flags & (FL_FLY | FL_SWIM)))
1967         {
1968                 if (flags & FL_ONGROUND)
1969                 {
1970                         // freefall if onground and moving upward
1971                         // freefall if not standing on a world surface (it may be a lift or trap door)
1972                         if ((ent->fields.server->velocity[2] >= (1.0 / 32.0) && sv_gameplayfix_upwardvelocityclearsongroundflag.integer) || ent->fields.server->groundentity)
1973                         {
1974                                 ent->fields.server->flags -= FL_ONGROUND;
1975                                 SV_AddGravity(ent);
1976                                 SV_CheckVelocity(ent);
1977                                 SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
1978                                 SV_LinkEdict(ent, true);
1979                                 ent->priv.server->waterposition_forceupdate = true;
1980                         }
1981                 }
1982                 else
1983                 {
1984                         // freefall if not onground
1985                         int hitsound = ent->fields.server->velocity[2] < sv_gravity.value * -0.1;
1986
1987                         SV_AddGravity(ent);
1988                         SV_CheckVelocity(ent);
1989                         SV_FlyMove(ent, sv.frametime, NULL, SV_GenericHitSuperContentsMask(ent));
1990                         SV_LinkEdict(ent, true);
1991
1992                         // just hit ground
1993                         if (hitsound && (int)ent->fields.server->flags & FL_ONGROUND && sv_sound_land.string)
1994                                 SV_StartSound(ent, 0, sv_sound_land.string, 255, 1);
1995                         ent->priv.server->waterposition_forceupdate = true;
1996                 }
1997         }
1998
1999 // regular thinking
2000         if (!SV_RunThink(ent))
2001                 return;
2002
2003         if (ent->priv.server->waterposition_forceupdate || !VectorCompare(ent->fields.server->origin, ent->priv.server->waterposition_origin))
2004         {
2005                 ent->priv.server->waterposition_forceupdate = false;
2006                 VectorCopy(ent->fields.server->origin, ent->priv.server->waterposition_origin);
2007                 SV_CheckWaterTransition(ent);
2008         }
2009 }
2010
2011 //============================================================================
2012
2013 static void SV_Physics_Entity (prvm_edict_t *ent)
2014 {
2015         // don't run a move on newly spawned projectiles as it messes up movement
2016         // interpolation and rocket trails
2017         qboolean runmove = ent->priv.server->move;
2018         ent->priv.server->move = true;
2019         switch ((int) ent->fields.server->movetype)
2020         {
2021         case MOVETYPE_PUSH:
2022         case MOVETYPE_FAKEPUSH:
2023                 SV_Physics_Pusher (ent);
2024                 break;
2025         case MOVETYPE_NONE:
2026                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2027                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2028                         SV_RunThink (ent);
2029                 break;
2030         case MOVETYPE_FOLLOW:
2031                 SV_Physics_Follow (ent);
2032                 break;
2033         case MOVETYPE_NOCLIP:
2034                 if (SV_RunThink(ent))
2035                 {
2036                         SV_CheckWater(ent);
2037                         VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2038                         VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2039                 }
2040                 SV_LinkEdict(ent, false);
2041                 break;
2042         case MOVETYPE_STEP:
2043                 SV_Physics_Step (ent);
2044                 break;
2045         case MOVETYPE_WALK:
2046                 if (SV_RunThink (ent))
2047                 {
2048                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2049                                 SV_AddGravity (ent);
2050                         SV_CheckStuck (ent);
2051                         SV_WalkMove (ent);
2052                         SV_LinkEdict (ent, true);
2053                 }
2054                 break;
2055         case MOVETYPE_TOSS:
2056         case MOVETYPE_BOUNCE:
2057         case MOVETYPE_BOUNCEMISSILE:
2058         case MOVETYPE_FLYMISSILE:
2059         case MOVETYPE_FLY:
2060                 // regular thinking
2061                 if (SV_RunThink (ent) && (runmove || !sv_gameplayfix_delayprojectiles.integer))
2062                         SV_Physics_Toss (ent);
2063                 break;
2064         default:
2065                 Con_Printf ("SV_Physics: bad movetype %i\n", (int)ent->fields.server->movetype);
2066                 break;
2067         }
2068 }
2069
2070 void SV_Physics_ClientMove(void)
2071 {
2072         prvm_edict_t *ent;
2073         ent = host_client->edict;
2074
2075         // call player physics, this needs the proper frametime
2076         prog->globals.server->frametime = sv.frametime;
2077         SV_ClientThink();
2078
2079         // call standard client pre-think, with frametime = 0
2080         prog->globals.server->time = sv.time;
2081         prog->globals.server->frametime = 0;
2082         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2083         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2084         prog->globals.server->frametime = sv.frametime;
2085
2086         // make sure the velocity is sane (not a NaN)
2087         SV_CheckVelocity(ent);
2088         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2089         // player_run/player_stand1 does not horribly malfunction if the
2090         // velocity becomes a number that is both == 0 and != 0
2091         // (sounds to me like NaN but to be absolutely safe...)
2092         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2093                 VectorClear(ent->fields.server->velocity);
2094
2095         // perform MOVETYPE_WALK behavior
2096         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2097                 SV_AddGravity (ent);
2098         SV_CheckStuck (ent);
2099         SV_WalkMove (ent);
2100
2101         SV_CheckVelocity (ent);
2102
2103         SV_LinkEdict (ent, true);
2104
2105         SV_CheckVelocity (ent);
2106
2107         // call standard player post-think, with frametime = 0
2108         prog->globals.server->time = sv.time;
2109         prog->globals.server->frametime = 0;
2110         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2111         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2112         prog->globals.server->frametime = sv.frametime;
2113
2114         if(ent->fields.server->fixangle)
2115         {
2116                 // angle fixing was requested by physics code...
2117                 // so store the current angles for later use
2118                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2119                 host_client->fixangle_angles_set = TRUE;
2120
2121                 // and clear fixangle for the next frame
2122                 ent->fields.server->fixangle = 0;
2123         }
2124 }
2125
2126 void SV_Physics_ClientEntity(prvm_edict_t *ent)
2127 {
2128         // don't do physics on disconnected clients, FrikBot relies on this
2129         if (!host_client->spawned)
2130         {
2131                 memset(&host_client->cmd, 0, sizeof(host_client->cmd));
2132                 return;
2133         }
2134
2135         // don't run physics here if running asynchronously
2136         if (host_client->clmovement_skipphysicsframes <= 0)
2137                 SV_ClientThink();
2138
2139         // make sure the velocity is sane (not a NaN)
2140         SV_CheckVelocity(ent);
2141         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
2142         // player_run/player_stand1 does not horribly malfunction if the
2143         // velocity becomes a number that is both == 0 and != 0
2144         // (sounds to me like NaN but to be absolutely safe...)
2145         if (DotProduct(ent->fields.server->velocity, ent->fields.server->velocity) < 0.0001)
2146                 VectorClear(ent->fields.server->velocity);
2147
2148         // call standard client pre-think
2149         prog->globals.server->time = sv.time;
2150         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2151         PRVM_ExecuteProgram (prog->globals.server->PlayerPreThink, "QC function PlayerPreThink is missing");
2152         SV_CheckVelocity (ent);
2153
2154         switch ((int) ent->fields.server->movetype)
2155         {
2156         case MOVETYPE_PUSH:
2157         case MOVETYPE_FAKEPUSH:
2158                 SV_Physics_Pusher (ent);
2159                 break;
2160         case MOVETYPE_NONE:
2161                 // LordHavoc: manually inlined the thinktime check here because MOVETYPE_NONE is used on so many objects
2162                 if (ent->fields.server->nextthink > 0 && ent->fields.server->nextthink <= sv.time + sv.frametime)
2163                         SV_RunThink (ent);
2164                 break;
2165         case MOVETYPE_FOLLOW:
2166                 SV_Physics_Follow (ent);
2167                 break;
2168         case MOVETYPE_NOCLIP:
2169                 SV_RunThink(ent);
2170                 SV_CheckWater(ent);
2171                 VectorMA(ent->fields.server->origin, sv.frametime, ent->fields.server->velocity, ent->fields.server->origin);
2172                 VectorMA(ent->fields.server->angles, sv.frametime, ent->fields.server->avelocity, ent->fields.server->angles);
2173                 break;
2174         case MOVETYPE_STEP:
2175                 SV_Physics_Step (ent);
2176                 break;
2177         case MOVETYPE_WALK:
2178                 SV_RunThink (ent);
2179                 // don't run physics here if running asynchronously
2180                 if (host_client->clmovement_skipphysicsframes <= 0)
2181                 {
2182                         if (!SV_CheckWater (ent) && ! ((int)ent->fields.server->flags & FL_WATERJUMP) )
2183                                 SV_AddGravity (ent);
2184                         SV_CheckStuck (ent);
2185                         SV_WalkMove (ent);
2186                         host_client->cmd.time = max(host_client->cmd.time, sv.time); // ignore client movement data for anything before NOW
2187                 }
2188                 break;
2189         case MOVETYPE_TOSS:
2190         case MOVETYPE_BOUNCE:
2191         case MOVETYPE_BOUNCEMISSILE:
2192         case MOVETYPE_FLYMISSILE:
2193                 // regular thinking
2194                 SV_RunThink (ent);
2195                 SV_Physics_Toss (ent);
2196                 break;
2197         case MOVETYPE_FLY:
2198                 SV_RunThink (ent);
2199                 SV_CheckWater (ent);
2200                 SV_WalkMove (ent);
2201                 break;
2202         default:
2203                 Con_Printf ("SV_Physics_ClientEntity: bad movetype %i\n", (int)ent->fields.server->movetype);
2204                 break;
2205         }
2206
2207         // decrement the countdown variable used to decide when to go back to
2208         // synchronous physics
2209         if (host_client->clmovement_skipphysicsframes > 0)
2210                 host_client->clmovement_skipphysicsframes--;
2211
2212         SV_CheckVelocity (ent);
2213
2214         SV_LinkEdict (ent, true);
2215
2216         SV_CheckVelocity (ent);
2217
2218         // call standard player post-think
2219         prog->globals.server->time = sv.time;
2220         prog->globals.server->self = PRVM_EDICT_TO_PROG(ent);
2221         PRVM_ExecuteProgram (prog->globals.server->PlayerPostThink, "QC function PlayerPostThink is missing");
2222
2223         if(ent->fields.server->fixangle)
2224         {
2225                 // angle fixing was requested by physics code...
2226                 // so store the current angles for later use
2227                 memcpy(host_client->fixangle_angles, ent->fields.server->angles, sizeof(host_client->fixangle_angles));
2228                 host_client->fixangle_angles_set = TRUE;
2229
2230                 // and clear fixangle for the next frame
2231                 ent->fields.server->fixangle = 0;
2232         }
2233 }
2234
2235 /*
2236 ================
2237 SV_Physics
2238
2239 ================
2240 */
2241 void SV_Physics (void)
2242 {
2243         int i;
2244         prvm_edict_t *ent;
2245
2246 // let the progs know that a new frame has started
2247         prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2248         prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2249         prog->globals.server->time = sv.time;
2250         prog->globals.server->frametime = sv.frametime;
2251         PRVM_ExecuteProgram (prog->globals.server->StartFrame, "QC function StartFrame is missing");
2252
2253 //
2254 // treat each object in turn
2255 //
2256
2257         // if force_retouch, relink all the entities
2258         if (prog->globals.server->force_retouch > 0)
2259                 for (i = 1, ent = PRVM_EDICT_NUM(i);i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2260                         if (!ent->priv.server->free)
2261                                 SV_LinkEdict (ent, true);       // force retouch even for stationary
2262
2263         // run physics on the client entities
2264         for (i = 1, ent = PRVM_EDICT_NUM(i), host_client = svs.clients;i <= svs.maxclients;i++, ent = PRVM_NEXT_EDICT(ent), host_client++)
2265                 if (!ent->priv.server->free)
2266                                 SV_Physics_ClientEntity(ent);
2267
2268         // run physics on all the non-client entities
2269         if (!sv_freezenonclients.integer)
2270                 for (;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
2271                         if (!ent->priv.server->free)
2272                                 SV_Physics_Entity(ent);
2273
2274         if (prog->globals.server->force_retouch > 0)
2275                 prog->globals.server->force_retouch = max(0, prog->globals.server->force_retouch - 1);
2276
2277         // LordHavoc: endframe support
2278         if (prog->funcoffsets.EndFrame)
2279         {
2280                 prog->globals.server->self = PRVM_EDICT_TO_PROG(prog->edicts);
2281                 prog->globals.server->other = PRVM_EDICT_TO_PROG(prog->edicts);
2282                 prog->globals.server->time = sv.time;
2283                 PRVM_ExecuteProgram (prog->funcoffsets.EndFrame, "QC function EndFrame is missing");
2284         }
2285
2286         // decrement prog->num_edicts if the highest number entities died
2287         for (;PRVM_EDICT_NUM(prog->num_edicts - 1)->priv.server->free;prog->num_edicts--);
2288
2289         if (!sv_freezenonclients.integer)
2290                 sv.time += sv.frametime;
2291 }