changed all references to entity_render_t->frame to frame2 to eliminate
[xonotic/darkplaces.git] / cl_collision.c
1
2 #include "quakedef.h"
3 #include "cl_collision.h"
4
5 float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
6 {
7         float maxfrac, maxrealfrac;
8         int n;
9         entity_render_t *ent;
10         float tracemins[3], tracemaxs[3];
11         trace_t trace;
12         float tempnormal[3], starttransformed[3], endtransformed[3];
13
14         memset (&trace, 0 , sizeof(trace_t));
15         trace.fraction = 1;
16         trace.realfraction = 1;
17         VectorCopy (end, trace.endpos);
18
19         if (hitent)
20                 *hitent = 0;
21         if (cl.worldmodel && cl.worldmodel->TraceBox)
22                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, vec3_origin, vec3_origin, end, SUPERCONTENTS_SOLID);
23
24         if (normal)
25                 VectorCopy(trace.plane.normal, normal);
26         maxfrac = trace.fraction;
27         maxrealfrac = trace.realfraction;
28
29         tracemins[0] = min(start[0], end[0]);
30         tracemaxs[0] = max(start[0], end[0]);
31         tracemins[1] = min(start[1], end[1]);
32         tracemaxs[1] = max(start[1], end[1]);
33         tracemins[2] = min(start[2], end[2]);
34         tracemaxs[2] = max(start[2], end[2]);
35
36         // look for embedded bmodels
37         for (n = 0;n < cl.num_entities;n++)
38         {
39                 if (!cl.entities_active[n])
40                         continue;
41                 ent = &cl.entities[n].render;
42                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
43                         continue;
44                 if (!ent->model || !ent->model->TraceBox)
45                         continue;
46                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
47                         continue;
48                 // if transparent and not selectable, skip entity
49                 if (!(cl.entities[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
50                         continue;
51                 if (ent == ignoreent)
52                         continue;
53                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
54                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
55
56                 //if (ent->model && ent->model->TraceBox)
57                         ent->model->TraceBox(ent->model, ent->frameblend[0].frame, &trace, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID);
58
59                 if (maxrealfrac > trace.realfraction)
60                 {
61                         if (hitent)
62                                 *hitent = n;
63                         maxfrac = trace.fraction;
64                         maxrealfrac = trace.realfraction;
65                         if (normal)
66                         {
67                                 VectorCopy(trace.plane.normal, tempnormal);
68                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
69                         }
70                 }
71         }
72         maxfrac = bound(0, maxfrac, 1);
73         maxrealfrac = bound(0, maxrealfrac, 1);
74         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
75         if (impact)
76                 VectorLerp(start, maxfrac, end, impact);
77         return maxfrac;
78 }
79
80 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
81 {
82         // FIXME: check multiple brush models
83         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
84                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
85 }
86
87 model_t *CL_GetModelByIndex(int modelindex)
88 {
89         if(!modelindex)
90                 return NULL;
91         if (modelindex < 0)
92         {
93                 modelindex = -(modelindex+1);
94                 if (modelindex < MAX_MODELS)
95                         return cl.csqc_model_precache[modelindex];
96         }
97         else
98         {
99                 if(modelindex < MAX_MODELS)
100                         return cl.model_precache[modelindex];
101         }
102         return NULL;
103 }
104
105 model_t *CL_GetModelFromEdict(prvm_edict_t *ed)
106 {
107         if (!ed || ed->priv.server->free)
108                 return NULL;
109         return CL_GetModelByIndex((int)ed->fields.client->modelindex);
110 }
111
112 void CL_LinkEdict(prvm_edict_t *ent)
113 {
114         if (ent == prog->edicts)
115                 return;         // don't add the world
116
117         if (ent->priv.server->free)
118                 return;
119
120         VectorAdd(ent->fields.client->origin, ent->fields.client->mins, ent->fields.client->absmin);
121         VectorAdd(ent->fields.client->origin, ent->fields.client->maxs, ent->fields.client->absmax);
122
123         World_LinkEdict(&cl.world, ent, ent->fields.client->absmin, ent->fields.client->absmax);
124 }
125
126 int CL_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
127 {
128         prvm_eval_t *val;
129         if (passedict)
130         {
131                 val = PRVM_EDICTFIELDVALUE(passedict, prog->fieldoffsets.dphitcontentsmask);
132                 if (val && val->_float)
133                         return (int)val->_float;
134                 else if (passedict->fields.client->solid == SOLID_SLIDEBOX)
135                 {
136                         if ((int)passedict->fields.client->flags & FL_MONSTER)
137                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
138                         else
139                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
140                 }
141                 else if (passedict->fields.client->solid == SOLID_CORPSE)
142                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
143                 else if (passedict->fields.client->solid == SOLID_TRIGGER)
144                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
145                 else
146                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
147         }
148         else
149                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
150 }
151
152 /*
153 ==================
154 CL_Move
155 ==================
156 */
157 trace_t CL_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, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
158 {
159         vec3_t hullmins, hullmaxs;
160         int i, bodysupercontents;
161         int passedictprog;
162         qboolean pointtrace;
163         prvm_edict_t *traceowner, *touch;
164         trace_t trace;
165         // bounding box of entire move area
166         vec3_t clipboxmins, clipboxmaxs;
167         // size of the moving object
168         vec3_t clipmins, clipmaxs;
169         // size when clipping against monsters
170         vec3_t clipmins2, clipmaxs2;
171         // start and end origin of move
172         vec3_t clipstart, clipend;
173         // trace results
174         trace_t cliptrace;
175         // matrices to transform into/out of other entity's space
176         matrix4x4_t matrix, imatrix;
177         // model of other entity
178         model_t *model;
179         // list of entities to test for collisions
180         int numtouchedicts;
181         prvm_edict_t *touchedicts[MAX_EDICTS];
182
183         if (hitnetworkentity)
184                 *hitnetworkentity = 0;
185
186         VectorCopy(start, clipstart);
187         VectorCopy(end, clipend);
188         VectorCopy(mins, clipmins);
189         VectorCopy(maxs, clipmaxs);
190         VectorCopy(mins, clipmins2);
191         VectorCopy(maxs, clipmaxs2);
192 #if COLLISIONPARANOID >= 3
193         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
194 #endif
195
196         // clip to world
197         Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
198         cliptrace.bmodelstartsolid = cliptrace.startsolid;
199         if (cliptrace.startsolid || cliptrace.fraction < 1)
200                 cliptrace.ent = prog ? prog->edicts : NULL;
201         if (type == MOVE_WORLDONLY)
202                 return cliptrace;
203
204         if (type == MOVE_MISSILE)
205         {
206                 // LordHavoc: modified this, was = -15, now -= 15
207                 for (i = 0;i < 3;i++)
208                 {
209                         clipmins2[i] -= 15;
210                         clipmaxs2[i] += 15;
211                 }
212         }
213
214         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
215         if (cl.worldmodel && cl.worldmodel->brush.RoundUpToHullSize)
216                 cl.worldmodel->brush.RoundUpToHullSize(cl.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
217         else
218         {
219                 VectorCopy(clipmins, hullmins);
220                 VectorCopy(clipmaxs, hullmaxs);
221         }
222
223         // create the bounding box of the entire move
224         for (i = 0;i < 3;i++)
225         {
226                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
227                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
228         }
229
230         // debug override to test against everything
231         if (sv_debugmove.integer)
232         {
233                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
234                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
235         }
236
237         // if the passedict is world, make it NULL (to avoid two checks each time)
238         // this checks prog because this function is often called without a CSQC
239         // VM context
240         if (prog == NULL || passedict == prog->edicts)
241                 passedict = NULL;
242         // precalculate prog value for passedict for comparisons
243         passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
244         // figure out whether this is a point trace for comparisons
245         pointtrace = VectorCompare(clipmins, clipmaxs);
246         // precalculate passedict's owner edict pointer for comparisons
247         traceowner = passedict ? PRVM_PROG_TO_EDICT(passedict->fields.client->owner) : 0;
248
249         // collide against network entities
250         if (hitnetworkbrushmodels)
251         {
252                 for (i = 0;i < cl.num_brushmodel_entities;i++)
253                 {
254                         entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
255                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
256                                 continue;
257                         Collision_ClipToGenericEntity(&trace, ent->model, ent->frame2, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask);
258                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
259                                 *hitnetworkentity = cl.brushmodel_entities[i];
260                         Collision_CombineTraces(&cliptrace, &trace, NULL, true);
261                 }
262         }
263
264         // collide against player entities
265         if (hitnetworkplayers)
266         {
267                 vec3_t origin, entmins, entmaxs;
268                 matrix4x4_t entmatrix, entinversematrix;
269                 for (i = 1;i < cl.maxclients+1;i++)
270                 {
271                         entity_render_t *ent = &cl.entities[i].render;
272                         // don't hit ourselves
273                         if (i == cl.playerentity)
274                                 continue;
275                         Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
276                         VectorAdd(origin, cl.playerstandmins, entmins);
277                         VectorAdd(origin, cl.playerstandmaxs, entmaxs);
278                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
279                                 continue;
280                         Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
281                         Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
282                         Collision_ClipToGenericEntity(&trace, NULL, 0, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask);
283                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
284                                 *hitnetworkentity = i;
285                         Collision_CombineTraces(&cliptrace, &trace, NULL, false);
286                 }
287         }
288
289         // clip to entities
290         // because this uses World_EntitiestoBox, we know all entity boxes overlap
291         // the clip region, so we can skip culling checks in the loop below
292         // note: if prog is NULL then there won't be any linked entities
293         numtouchedicts = 0;
294         if (hitcsqcentities && prog != NULL)
295         {
296                 numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
297                 if (numtouchedicts > MAX_EDICTS)
298                 {
299                         // this never happens
300                         Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
301                         numtouchedicts = MAX_EDICTS;
302                 }
303         }
304         for (i = 0;i < numtouchedicts;i++)
305         {
306                 touch = touchedicts[i];
307
308                 if (touch->fields.client->solid < SOLID_BBOX)
309                         continue;
310                 if (type == MOVE_NOMONSTERS && touch->fields.client->solid != SOLID_BSP)
311                         continue;
312
313                 if (passedict)
314                 {
315                         // don't clip against self
316                         if (passedict == touch)
317                                 continue;
318                         // don't clip owned entities against owner
319                         if (traceowner == touch)
320                                 continue;
321                         // don't clip owner against owned entities
322                         if (passedictprog == touch->fields.client->owner)
323                                 continue;
324                         // don't clip points against points (they can't collide)
325                         if (pointtrace && VectorCompare(touch->fields.client->mins, touch->fields.client->maxs) && (type != MOVE_MISSILE || !((int)touch->fields.client->flags & FL_MONSTER)))
326                                 continue;
327                 }
328
329                 bodysupercontents = touch->fields.client->solid == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
330
331                 // might interact, so do an exact clip
332                 model = NULL;
333                 if ((int) touch->fields.client->solid == SOLID_BSP || type == MOVE_HITMODEL)
334                 {
335                         unsigned int modelindex = (unsigned int)touch->fields.client->modelindex;
336                         // if the modelindex is 0, it shouldn't be SOLID_BSP!
337                         if (modelindex > 0 && modelindex < MAX_MODELS)
338                                 model = cl.model_precache[(int)touch->fields.client->modelindex];
339                 }
340                 if (model)
341                         Matrix4x4_CreateFromQuakeEntity(&matrix, touch->fields.client->origin[0], touch->fields.client->origin[1], touch->fields.client->origin[2], touch->fields.client->angles[0], touch->fields.client->angles[1], touch->fields.client->angles[2], 1);
342                 else
343                         Matrix4x4_CreateTranslate(&matrix, touch->fields.client->origin[0], touch->fields.client->origin[1], touch->fields.client->origin[2]);
344                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
345                 if ((int)touch->fields.client->flags & FL_MONSTER)
346                         Collision_ClipToGenericEntity(&trace, model, touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
347                 else
348                         Collision_ClipToGenericEntity(&trace, model, touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
349
350                 if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
351                         *hitnetworkentity = 0;
352                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, touch->fields.client->solid == SOLID_BSP);
353         }
354
355         return cliptrace;
356 }