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1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // world.c -- world query functions
21
22 #include "quakedef.h"
23
24 /*
25
26 entities never clip against themselves, or their owner
27
28 line of sight checks trace->inopen and trace->inwater, but bullets don't
29
30 */
31
32 cvar_t sv_debugmove = {CVAR_NOTIFY, "sv_debugmove", "0"};
33 cvar_t sv_areagrid_mingridsize = {CVAR_NOTIFY, "sv_areagrid_mingridsize", "64"};
34
35 void SV_AreaStats_f(void);
36
37 void SV_World_Init(void)
38 {
39         Cvar_RegisterVariable(&sv_debugmove);
40         Cvar_RegisterVariable(&sv_areagrid_mingridsize);
41         Cmd_AddCommand("sv_areastats", SV_AreaStats_f);
42         Collision_Init();
43 }
44
45 typedef struct
46 {
47         // bounding box of entire move area
48         vec3_t boxmins, boxmaxs;
49
50         // size of the moving object
51         vec3_t mins, maxs;
52
53         // size when clipping against monsters
54         vec3_t mins2, maxs2;
55
56         // start and end origin of move
57         vec3_t start, end;
58
59         // trace results
60         trace_t trace;
61
62         // type of move (like ignoring monsters, or similar)
63         int type;
64
65         // the edict that is moving (if any)
66         edict_t *passedict;
67 }
68 moveclip_t;
69
70 //============================================================================
71
72 // ClearLink is used for new headnodes
73 static void ClearLink (link_t *l)
74 {
75         l->entitynumber = 0;
76         l->prev = l->next = l;
77 }
78
79 static void RemoveLink (link_t *l)
80 {
81         l->next->prev = l->prev;
82         l->prev->next = l->next;
83 }
84
85 static void InsertLinkBefore (link_t *l, link_t *before, int entitynumber)
86 {
87         l->entitynumber = entitynumber;
88         l->next = before;
89         l->prev = before->prev;
90         l->prev->next = l;
91         l->next->prev = l;
92 }
93
94
95 /*
96 ===============================================================================
97
98 ENTITY AREA CHECKING
99
100 ===============================================================================
101 */
102
103 int sv_areagrid_stats_calls = 0;
104 int sv_areagrid_stats_nodechecks = 0;
105 int sv_areagrid_stats_entitychecks = 0;
106
107 void SV_AreaStats_f(void)
108 {
109         Con_Printf("areagrid check stats: %d calls %d nodes (%f per call) %d entities (%f per call)\n", sv_areagrid_stats_calls, sv_areagrid_stats_nodechecks, (double) sv_areagrid_stats_nodechecks / (double) sv_areagrid_stats_calls, sv_areagrid_stats_entitychecks, (double) sv_areagrid_stats_entitychecks / (double) sv_areagrid_stats_calls);
110         sv_areagrid_stats_calls = 0;
111         sv_areagrid_stats_nodechecks = 0;
112         sv_areagrid_stats_entitychecks = 0;
113 }
114
115 typedef struct areagrid_s
116 {
117         link_t trigger_edicts;
118         link_t solid_edicts;
119 }
120 areagrid_t;
121
122 #define AREA_GRID 512
123 #define AREA_GRIDNODES (AREA_GRID * AREA_GRID)
124
125 static areagrid_t sv_areagrid[AREA_GRIDNODES], sv_areagrid_outside;
126 static vec3_t sv_areagrid_bias, sv_areagrid_scale, sv_areagrid_mins, sv_areagrid_maxs, sv_areagrid_size;
127 static int sv_areagrid_marknumber = 1;
128
129 void SV_CreateAreaGrid (vec3_t mins, vec3_t maxs)
130 {
131         int i;
132         ClearLink (&sv_areagrid_outside.trigger_edicts);
133         ClearLink (&sv_areagrid_outside.solid_edicts);
134         // choose either the world box size, or a larger box to ensure the grid isn't too fine
135         sv_areagrid_size[0] = max(maxs[0] - mins[0], AREA_GRID * sv_areagrid_mingridsize.value);
136         sv_areagrid_size[1] = max(maxs[1] - mins[1], AREA_GRID * sv_areagrid_mingridsize.value);
137         sv_areagrid_size[2] = max(maxs[2] - mins[2], AREA_GRID * sv_areagrid_mingridsize.value);
138         // figure out the corners of such a box, centered at the center of the world box
139         sv_areagrid_mins[0] = (mins[0] + maxs[0] - sv_areagrid_size[0]) * 0.5f;
140         sv_areagrid_mins[1] = (mins[1] + maxs[1] - sv_areagrid_size[1]) * 0.5f;
141         sv_areagrid_mins[2] = (mins[2] + maxs[2] - sv_areagrid_size[2]) * 0.5f;
142         sv_areagrid_maxs[0] = (mins[0] + maxs[0] + sv_areagrid_size[0]) * 0.5f;
143         sv_areagrid_maxs[1] = (mins[1] + maxs[1] + sv_areagrid_size[1]) * 0.5f;
144         sv_areagrid_maxs[2] = (mins[2] + maxs[2] + sv_areagrid_size[2]) * 0.5f;
145         // now calculate the actual useful info from that
146         VectorNegate(sv_areagrid_mins, sv_areagrid_bias);
147         sv_areagrid_scale[0] = AREA_GRID / sv_areagrid_size[0];
148         sv_areagrid_scale[1] = AREA_GRID / sv_areagrid_size[1];
149         sv_areagrid_scale[2] = AREA_GRID / sv_areagrid_size[2];
150         for (i = 0;i < AREA_GRIDNODES;i++)
151         {
152                 ClearLink (&sv_areagrid[i].trigger_edicts);
153                 ClearLink (&sv_areagrid[i].solid_edicts);
154         }
155         Con_DPrintf("sv_areagrid settings: divisions %ix%ix1 : box %f %f %f : %f %f %f size %f %f %f grid %f %f %f (mingrid %f)\n", AREA_GRID, AREA_GRID, sv_areagrid_mins[0], sv_areagrid_mins[1], sv_areagrid_mins[2], sv_areagrid_maxs[0], sv_areagrid_maxs[1], sv_areagrid_maxs[2], sv_areagrid_size[0], sv_areagrid_size[1], sv_areagrid_size[2], 1.0f / sv_areagrid_scale[0], 1.0f / sv_areagrid_scale[1], 1.0f / sv_areagrid_scale[2], sv_areagrid_mingridsize.value);
156 }
157
158 /*
159 ===============
160 SV_ClearWorld
161
162 ===============
163 */
164 void SV_ClearWorld (void)
165 {
166         Mod_CheckLoaded(sv.worldmodel);
167         SV_CreateAreaGrid(sv.worldmodel->normalmins, sv.worldmodel->normalmaxs);
168 }
169
170
171 /*
172 ===============
173 SV_UnlinkEdict
174
175 ===============
176 */
177 void SV_UnlinkEdict (edict_t *ent)
178 {
179         int i;
180         for (i = 0;i < ENTITYGRIDAREAS;i++)
181         {
182                 if (ent->e->areagrid[i].prev)
183                 {
184                         RemoveLink (&ent->e->areagrid[i]);
185                         ent->e->areagrid[i].prev = ent->e->areagrid[i].next = NULL;
186                 }
187         }
188 }
189
190
191 void SV_TouchAreaGrid(edict_t *ent)
192 {
193         link_t *l;
194         edict_t *touch;
195         areagrid_t *grid;
196         int old_self, old_other, igrid[3], igridmins[3], igridmaxs[3];
197         int i, numtouchedicts;
198         unsigned short touchedictnumbers[MAX_EDICTS];
199
200         sv_areagrid_marknumber++;
201         igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
202         igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
203         //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
204         igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
205         igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
206         //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
207         igridmins[0] = max(0, igridmins[0]);
208         igridmins[1] = max(0, igridmins[1]);
209         //igridmins[2] = max(0, igridmins[2]);
210         igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
211         igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
212         //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
213
214         // build a list of edicts to touch, because the link loop can be corrupted
215         // by SV_IncreaseEdicts called during touch functions
216         numtouchedicts = 0;
217         for (l = sv_areagrid_outside.trigger_edicts.next;l != &sv_areagrid_outside.trigger_edicts;l = l->next)
218                 touchedictnumbers[numtouchedicts++] = l->entitynumber;
219
220         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
221         {
222                 grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
223                 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
224                         for (l = grid->trigger_edicts.next;l != &grid->trigger_edicts;l = l->next)
225                                 touchedictnumbers[numtouchedicts++] = l->entitynumber;
226         }
227
228         old_self = pr_global_struct->self;
229         old_other = pr_global_struct->other;
230         for (i = 0;i < numtouchedicts && !ent->e->free;i++)
231         {
232                 touch = EDICT_NUM_UNSIGNED(touchedictnumbers[i]);
233                 if (ent->v->absmin[0] > touch->v->absmax[0]
234                  || ent->v->absmax[0] < touch->v->absmin[0]
235                  || ent->v->absmin[1] > touch->v->absmax[1]
236                  || ent->v->absmax[1] < touch->v->absmin[1]
237                  || ent->v->absmin[2] > touch->v->absmax[2]
238                  || ent->v->absmax[2] < touch->v->absmin[2])
239                         continue;
240                 if (touch == ent)
241                         continue;
242                 if (!touch->v->touch || touch->v->solid != SOLID_TRIGGER)
243                         continue;
244                 pr_global_struct->self = EDICT_TO_PROG(touch);
245                 pr_global_struct->other = EDICT_TO_PROG(ent);
246                 pr_global_struct->time = sv.time;
247                 PR_ExecuteProgram (touch->v->touch, "");
248         }
249         pr_global_struct->self = old_self;
250         pr_global_struct->other = old_other;
251 }
252
253 void SV_LinkEdict_AreaGrid(edict_t *ent)
254 {
255         areagrid_t *grid;
256         int igrid[3], igridmins[3], igridmaxs[3], gridnum, entitynumber = NUM_FOR_EDICT(ent);
257
258         if (entitynumber <= 0 || entitynumber >= sv.max_edicts || EDICT_NUM(entitynumber) != ent)
259                 Host_Error("SV_LinkEdict_AreaGrid: invalid edict %p (sv.edicts is %p, edict compared to sv.edicts is %i)\n", ent, sv.edicts, entitynumber);
260
261         igridmins[0] = (int) ((ent->v->absmin[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
262         igridmins[1] = (int) ((ent->v->absmin[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
263         //igridmins[2] = (int) ((ent->v->absmin[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
264         igridmaxs[0] = (int) ((ent->v->absmax[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
265         igridmaxs[1] = (int) ((ent->v->absmax[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
266         //igridmaxs[2] = (int) ((ent->v->absmax[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
267         if (igridmins[0] < 0 || igridmaxs[0] > AREA_GRID || igridmins[1] < 0 || igridmaxs[1] > AREA_GRID || ((igridmaxs[0] - igridmins[0]) * (igridmaxs[1] - igridmins[1])) > ENTITYGRIDAREAS)
268         {
269                 // wow, something outside the grid, store it as such
270                 if (ent->v->solid == SOLID_TRIGGER)
271                         InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.trigger_edicts, entitynumber);
272                 else
273                         InsertLinkBefore (&ent->e->areagrid[0], &sv_areagrid_outside.solid_edicts, entitynumber);
274                 return;
275         }
276
277         gridnum = 0;
278         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
279         {
280                 grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0];
281                 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++, gridnum++)
282                 {
283                         if (ent->v->solid == SOLID_TRIGGER)
284                                 InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->trigger_edicts, entitynumber);
285                         else
286                                 InsertLinkBefore (&ent->e->areagrid[gridnum], &grid->solid_edicts, entitynumber);
287                 }
288         }
289 }
290
291 /*
292 ===============
293 SV_LinkEdict
294
295 ===============
296 */
297 void SV_LinkEdict (edict_t *ent, qboolean touch_triggers)
298 {
299         model_t *model;
300
301         if (ent->e->areagrid[0].prev)
302                 SV_UnlinkEdict (ent);   // unlink from old position
303
304         if (ent == sv.edicts)
305                 return;         // don't add the world
306
307         if (ent->e->free)
308                 return;
309
310 // set the abs box
311
312         if (ent->v->solid == SOLID_BSP)
313         {
314                 int modelindex = ent->v->modelindex;
315                 if (modelindex < 0 || modelindex > MAX_MODELS)
316                 {
317                         Con_DPrintf("edict %i: SOLID_BSP with invalid modelindex!\n", NUM_FOR_EDICT(ent));
318                         modelindex = 0;
319                 }
320                 model = sv.models[modelindex];
321                 if (model != NULL)
322                 {
323                         Mod_CheckLoaded(model);
324                         if (!model->TraceBox)
325                                 Con_DPrintf("edict %i: SOLID_BSP with non-collidable model\n", NUM_FOR_EDICT(ent));
326
327                         if (ent->v->angles[0] || ent->v->angles[2] || ent->v->avelocity[0] || ent->v->avelocity[2])
328                         {
329                                 VectorAdd(ent->v->origin, model->rotatedmins, ent->v->absmin);
330                                 VectorAdd(ent->v->origin, model->rotatedmaxs, ent->v->absmax);
331                         }
332                         else if (ent->v->angles[1] || ent->v->avelocity[1])
333                         {
334                                 VectorAdd(ent->v->origin, model->yawmins, ent->v->absmin);
335                                 VectorAdd(ent->v->origin, model->yawmaxs, ent->v->absmax);
336                         }
337                         else
338                         {
339                                 VectorAdd(ent->v->origin, model->normalmins, ent->v->absmin);
340                                 VectorAdd(ent->v->origin, model->normalmaxs, ent->v->absmax);
341                         }
342                 }
343                 else
344                 {
345                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
346                         VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
347                         VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
348                 }
349         }
350         else
351         {
352                 VectorAdd(ent->v->origin, ent->v->mins, ent->v->absmin);
353                 VectorAdd(ent->v->origin, ent->v->maxs, ent->v->absmax);
354         }
355
356 //
357 // to make items easier to pick up and allow them to be grabbed off
358 // of shelves, the abs sizes are expanded
359 //
360         if ((int)ent->v->flags & FL_ITEM)
361         {
362                 ent->v->absmin[0] -= 15;
363                 ent->v->absmin[1] -= 15;
364                 ent->v->absmin[2] -= 1;
365                 ent->v->absmax[0] += 15;
366                 ent->v->absmax[1] += 15;
367                 ent->v->absmax[2] += 1;
368         }
369         else
370         {
371                 // because movement is clipped an epsilon away from an actual edge,
372                 // we must fully check even when bounding boxes don't quite touch
373                 ent->v->absmin[0] -= 1;
374                 ent->v->absmin[1] -= 1;
375                 ent->v->absmin[2] -= 1;
376                 ent->v->absmax[0] += 1;
377                 ent->v->absmax[1] += 1;
378                 ent->v->absmax[2] += 1;
379         }
380
381         if (ent->v->solid == SOLID_NOT)
382                 return;
383
384         SV_LinkEdict_AreaGrid(ent);
385
386 // if touch_triggers, touch all entities at this node and descend for more
387         if (touch_triggers)
388                 SV_TouchAreaGrid(ent);
389 }
390
391
392
393 /*
394 ===============================================================================
395
396 POINT TESTING IN HULLS
397
398 ===============================================================================
399 */
400
401 /*
402 ============
403 SV_TestEntityPosition
404
405 This could be a lot more efficient...
406 ============
407 */
408 int SV_TestEntityPosition (edict_t *ent)
409 {
410         return SV_Move (ent->v->origin, ent->v->mins, ent->v->maxs, ent->v->origin, MOVE_NORMAL, ent).startsolid;
411 }
412
413
414 /*
415 ===============================================================================
416
417 LINE TESTING IN HULLS
418
419 ===============================================================================
420 */
421
422 /*
423 ==================
424 SV_ClipMoveToEntity
425
426 Handles selection or creation of a clipping hull, and offseting (and
427 eventually rotation) of the end points
428 ==================
429 */
430 trace_t SV_ClipMoveToEntity(edict_t *ent, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int movetype)
431 {
432         trace_t trace;
433         model_t *model = NULL;
434         matrix4x4_t matrix, imatrix;
435         float tempnormal[3], starttransformed[3], endtransformed[3];
436         float starttransformedmins[3], starttransformedmaxs[3], endtransformedmins[3], endtransformedmaxs[3];
437
438         memset(&trace, 0, sizeof(trace));
439         trace.fraction = trace.realfraction = 1;
440         VectorCopy(end, trace.endpos);
441
442         if ((int) ent->v->solid == SOLID_BSP || movetype == MOVE_HITMODEL)
443         {
444                 unsigned int modelindex = ent->v->modelindex;
445                 // if the modelindex is 0, it shouldn't be SOLID_BSP!
446                 if (modelindex == 0)
447                 {
448                         Con_DPrintf("SV_ClipMoveToEntity: edict %i: SOLID_BSP with no model\n", NUM_FOR_EDICT(ent));
449                         return trace;
450                 }
451                 if (modelindex >= MAX_MODELS)
452                 {
453                         Con_DPrintf("SV_ClipMoveToEntity: edict %i: SOLID_BSP with invalid modelindex\n", NUM_FOR_EDICT(ent));
454                         return trace;
455                 }
456                 model = sv.models[modelindex];
457                 if (modelindex != 0 && model == NULL)
458                 {
459                         Con_DPrintf("SV_ClipMoveToEntity: edict %i: SOLID_BSP with invalid modelindex\n", NUM_FOR_EDICT(ent));
460                         return trace;
461                 }
462
463                 Mod_CheckLoaded(model);
464                 if ((int) ent->v->solid == SOLID_BSP)
465                 {
466                         if (!model->TraceBox)
467                         {
468                                 Con_DPrintf("SV_ClipMoveToEntity: edict %i: SOLID_BSP with a non-collidable model\n", NUM_FOR_EDICT(ent));
469                                 return trace;
470                         }
471                         //if (ent->v->movetype != MOVETYPE_PUSH)
472                         //{
473                         //      Con_DPrintf("SV_ClipMoveToEntity: edict %i: SOLID_BSP without MOVETYPE_PUSH\n", NUM_FOR_EDICT(ent));
474                         //      return trace;
475                         //}
476                 }
477                 Matrix4x4_CreateFromQuakeEntity(&matrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2], ent->v->angles[0], ent->v->angles[1], ent->v->angles[2], 1);
478         }
479         else
480                 Matrix4x4_CreateTranslate(&matrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2]);
481
482         Matrix4x4_Invert_Simple(&imatrix, &matrix);
483         Matrix4x4_Transform(&imatrix, start, starttransformed);
484         Matrix4x4_Transform(&imatrix, end, endtransformed);
485 #if COLLISIONPARANOID >= 3
486         Con_Printf("trans(%f %f %f -> %f %f %f, %f %f %f -> %f %f %f)", start[0], start[1], start[2], starttransformed[0], starttransformed[1], starttransformed[2], end[0], end[1], end[2], endtransformed[0], endtransformed[1], endtransformed[2]);
487 #endif
488
489         if (model && model->TraceBox)
490         {
491                 int frame;
492                 frame = (int)ent->v->frame;
493                 frame = bound(0, frame, (model->numframes - 1));
494                 VectorAdd(starttransformed, maxs, starttransformedmaxs);
495                 VectorAdd(endtransformed, maxs, endtransformedmaxs);
496                 VectorAdd(starttransformed, mins, starttransformedmins);
497                 VectorAdd(endtransformed, mins, endtransformedmins);
498                 model->TraceBox(model, frame, &trace, starttransformedmins, starttransformedmaxs, endtransformedmins, endtransformedmaxs, SUPERCONTENTS_SOLID);
499         }
500         else
501                 Collision_ClipTrace_Box(&trace, ent->v->mins, ent->v->maxs, starttransformed, mins, maxs, endtransformed, SUPERCONTENTS_SOLID, SUPERCONTENTS_SOLID);
502
503         if (trace.fraction < 1)
504         {
505                 VectorLerp(start, trace.fraction, end, trace.endpos);
506                 VectorCopy(trace.plane.normal, tempnormal);
507                 Matrix4x4_Transform3x3(&matrix, tempnormal, trace.plane.normal);
508                 // FIXME: should recalc trace.plane.dist
509         }
510         else
511                 VectorCopy(end, trace.endpos);
512
513         return trace;
514 }
515
516 //===========================================================================
517
518 void SV_ClipToNode(moveclip_t *clip, link_t *list)
519 {
520         link_t *l, *next;
521         edict_t *touch;
522         trace_t trace;
523
524         sv_areagrid_stats_nodechecks++;
525         for (l = list->next;l != list;l = next)
526         {
527                 next = l->next;
528                 touch = EDICT_NUM(l->entitynumber);
529                 if (touch->e->areagridmarknumber == sv_areagrid_marknumber)
530                         continue;
531                 touch->e->areagridmarknumber = sv_areagrid_marknumber;
532                 sv_areagrid_stats_entitychecks++;
533
534                 // LordHavoc: this box comparison isn't much use with the high resolution areagrid
535                 /*
536                 if (clip->boxmins[0] > touch->v->absmax[0]
537                  || clip->boxmaxs[0] < touch->v->absmin[0]
538                  || clip->boxmins[1] > touch->v->absmax[1]
539                  || clip->boxmaxs[1] < touch->v->absmin[1]
540                  || clip->boxmins[2] > touch->v->absmax[2]
541                  || clip->boxmaxs[2] < touch->v->absmin[2])
542                         continue;
543                 */
544
545                 if (clip->type == MOVE_NOMONSTERS && touch->v->solid != SOLID_BSP)
546                         continue;
547
548                 if (touch->v->solid == SOLID_NOT)
549                         continue;
550
551                 if (clip->passedict)
552                 {
553                         if (touch == clip->passedict)
554                                 continue;
555                         if (!clip->passedict->v->size[0] && !touch->v->size[0])
556                                 continue;       // points never interact
557                         if (PROG_TO_EDICT(touch->v->owner) == clip->passedict)
558                                 continue;       // don't clip against own missiles
559                         if (PROG_TO_EDICT(clip->passedict->v->owner) == touch)
560                                 continue;       // don't clip against owner
561                         // LordHavoc: corpse code
562                         if (clip->passedict->v->solid == SOLID_CORPSE && (touch->v->solid == SOLID_SLIDEBOX || touch->v->solid == SOLID_CORPSE))
563                                 continue;
564                         if (clip->passedict->v->solid == SOLID_SLIDEBOX && touch->v->solid == SOLID_CORPSE)
565                                 continue;
566                 }
567
568                 if (touch->v->solid == SOLID_TRIGGER)
569                 {
570                         ED_Print(touch);
571                         Host_Error ("Trigger in clipping list");
572                 }
573
574                 // might interact, so do an exact clip
575                 if ((int)touch->v->flags & FL_MONSTER)
576                         trace = SV_ClipMoveToEntity(touch, clip->start, clip->mins2, clip->maxs2, clip->end, clip->type);
577                 else
578                         trace = SV_ClipMoveToEntity(touch, clip->start, clip->mins, clip->maxs, clip->end, clip->type);
579                 // LordHavoc: take the 'best' answers from the new trace and combine with existing data
580                 if (trace.allsolid)
581                         clip->trace.allsolid = true;
582                 if (trace.startsolid)
583                 {
584                         clip->trace.startsolid = true;
585                         if (clip->trace.realfraction == 1)
586                                 clip->trace.ent = touch;
587                 }
588                 // don't set this except on the world, because it can easily confuse
589                 // monsters underwater if there's a bmodel involved in the trace
590                 // (inopen && inwater is how they check water visibility)
591                 //if (trace.inopen)
592                 //      clip->trace.inopen = true;
593                 if (trace.inwater)
594                         clip->trace.inwater = true;
595                 if (trace.realfraction < clip->trace.realfraction)
596                 {
597                         clip->trace.fraction = trace.fraction;
598                         clip->trace.realfraction = trace.realfraction;
599                         VectorCopy(trace.endpos, clip->trace.endpos);
600                         clip->trace.plane = trace.plane;
601                         clip->trace.ent = touch;
602                 }
603                 clip->trace.startsupercontents |= trace.startsupercontents;
604         }
605 }
606
607 /*
608 ==================
609 SV_Move
610 ==================
611 */
612 #if COLLISIONPARANOID >= 1
613 trace_t SV_Move_(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, edict_t *passedict)
614 #else
615 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, edict_t *passedict)
616 #endif
617 {
618         moveclip_t clip;
619         vec3_t hullmins, hullmaxs;
620         areagrid_t *grid;
621         int i, igrid[3], igridmins[3], igridmaxs[3];
622
623         // if the passedict is world, make it NULL (to avoid two checks each time)
624         if (passedict == sv.edicts)
625                 passedict = NULL;
626
627         memset(&clip, 0, sizeof(moveclip_t));
628
629         VectorCopy(start, clip.start);
630         VectorCopy(end, clip.end);
631         VectorCopy(mins, clip.mins);
632         VectorCopy(maxs, clip.maxs);
633         VectorCopy(mins, clip.mins2);
634         VectorCopy(maxs, clip.maxs2);
635         clip.type = type;
636         clip.passedict = passedict;
637 #if COLLISIONPARANOID >= 3
638         Con_Printf("move(%f %f %f,%f %f %f)", clip.start[0], clip.start[1], clip.start[2], clip.end[0], clip.end[1], clip.end[2]);
639 #endif
640
641         // clip to world
642         clip.trace = SV_ClipMoveToEntity(sv.edicts, clip.start, clip.mins, clip.maxs, clip.end, clip.type);
643         if (clip.trace.startsolid || clip.trace.fraction < 1)
644                 clip.trace.ent = sv.edicts;
645         if (clip.type == MOVE_WORLDONLY)
646                 return clip.trace;
647
648         if (clip.type == MOVE_MISSILE)
649         {
650                 // LordHavoc: modified this, was = -15, now -= 15
651                 for (i = 0;i < 3;i++)
652                 {
653                         clip.mins2[i] -= 15;
654                         clip.maxs2[i] += 15;
655                 }
656         }
657
658         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
659         if (sv.worldmodel && sv.worldmodel->brush.RoundUpToHullSize)
660                 sv.worldmodel->brush.RoundUpToHullSize(sv.worldmodel, clip.mins, clip.maxs, hullmins, hullmaxs);
661         else
662         {
663                 VectorCopy(clip.mins, hullmins);
664                 VectorCopy(clip.maxs, hullmaxs);
665         }
666
667         // create the bounding box of the entire move
668         for (i = 0;i < 3;i++)
669         {
670                 clip.boxmins[i] = min(clip.start[i], clip.trace.endpos[i]) + min(hullmins[i], clip.mins2[i]) - 1;
671                 clip.boxmaxs[i] = max(clip.start[i], clip.trace.endpos[i]) + max(hullmaxs[i], clip.maxs2[i]) + 1;
672         }
673
674         // debug override to test against everything
675         if (sv_debugmove.integer)
676         {
677                 clip.boxmins[0] = clip.boxmins[1] = clip.boxmins[2] = -999999999;
678                 clip.boxmaxs[0] = clip.boxmaxs[1] = clip.boxmaxs[2] =  999999999;
679         }
680
681         // clip to enttiies
682         sv_areagrid_stats_calls++;
683         sv_areagrid_marknumber++;
684         igridmins[0] = (int) ((clip.boxmins[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]);
685         igridmins[1] = (int) ((clip.boxmins[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]);
686         //igridmins[2] = (int) ((clip->boxmins[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]);
687         igridmaxs[0] = (int) ((clip.boxmaxs[0] + sv_areagrid_bias[0]) * sv_areagrid_scale[0]) + 1;
688         igridmaxs[1] = (int) ((clip.boxmaxs[1] + sv_areagrid_bias[1]) * sv_areagrid_scale[1]) + 1;
689         //igridmaxs[2] = (int) ((clip->boxmaxs[2] + sv_areagrid_bias[2]) * sv_areagrid_scale[2]) + 1;
690         igridmins[0] = max(0, igridmins[0]);
691         igridmins[1] = max(0, igridmins[1]);
692         //igridmins[2] = max(0, igridmins[2]);
693         igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
694         igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
695         //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
696
697         if (sv_areagrid_outside.solid_edicts.next != &sv_areagrid_outside.solid_edicts)
698                 SV_ClipToNode(&clip, &sv_areagrid_outside.solid_edicts);
699
700         for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
701                 for (grid = sv_areagrid + igrid[1] * AREA_GRID + igridmins[0], igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
702                         if (grid->solid_edicts.next != &grid->solid_edicts)
703                                 SV_ClipToNode(&clip, &grid->solid_edicts);
704
705         return clip.trace;
706 }
707
708 #if COLLISIONPARANOID >= 1
709 trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, edict_t *passedict)
710 {
711         int endstuck;
712         trace_t trace;
713         vec3_t temp;
714         trace = SV_Move_(start, mins, maxs, end, type, passedict);
715         if (passedict)
716         {
717                 VectorCopy(trace.endpos, temp);
718                 endstuck = SV_Move_(temp, mins, maxs, temp, type, passedict).startsolid;
719 #if COLLISIONPARANOID < 3
720                 if (trace.startsolid || endstuck)
721 #endif
722                         Con_Printf("%s{e%i:%f %f %f:%f %f %f:%f:%f %f %f%s%s}\n", (trace.startsolid || endstuck) ? "\002" : "", passedict ? passedict - sv.edicts : -1, passedict->v->origin[0], passedict->v->origin[1], passedict->v->origin[2], end[0] - passedict->v->origin[0], end[1] - passedict->v->origin[1], end[2] - passedict->v->origin[2], trace.fraction, trace.endpos[0] - passedict->v->origin[0], trace.endpos[1] - passedict->v->origin[1], trace.endpos[2] - passedict->v->origin[2], trace.startsolid ? " startstuck" : "", endstuck ? " endstuck" : "");
723         }
724         return trace;
725 }
726 #endif
727
728 int SV_PointSuperContents(const vec3_t point)
729 {
730         return SV_Move(point, vec3_origin, vec3_origin, point, sv_gameplayfix_swiminbmodels.integer ? MOVE_NOMONSTERS : MOVE_WORLDONLY, NULL).startsupercontents;
731 }
732
733 int SV_PointQ1Contents(const vec3_t point)
734 {
735         return Mod_Q1BSP_NativeContentsFromSuperContents(NULL, SV_PointSuperContents(point));
736 }
737
738