cl_collision.c

   1
   2 #include "quakedef.h"
   3 #include "cl_collision.h"
   4
   5 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
   6 float CL_SelectTraceLine(const vec3_t start, const vec3_t pEnd, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
   7 #else
   8 float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
   9 #endif
  10 {
  11         float maxfrac, maxrealfrac;
  12         int n;
  13         entity_render_t *ent;
  14         float tracemins[3], tracemaxs[3];
  15         trace_t trace;
  16         float tempnormal[3], starttransformed[3], endtransformed[3];
  17 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
  18         vec3_t end;
  19         vec_t len = 0;
  20
  21         if(!VectorCompare(start, pEnd))
  22         {
  23                 // TRICK: make the trace 1 qu longer!
  24                 VectorSubtract(pEnd, start, end);
  25                 len = VectorNormalizeLength(end);
  26                 VectorAdd(pEnd, end, end);
  27         }
  28         else
  29                 VectorCopy(pEnd, end);
  30 #endif
  31
  32         memset (&trace, 0 , sizeof(trace_t));
  33         trace.fraction = 1;
  34         trace.realfraction = 1;
  35         VectorCopy (end, trace.endpos);
  36
  37         if (hitent)
  38                 *hitent = 0;
  39         if (cl.worldmodel && cl.worldmodel->TraceBox)
  40                 cl.worldmodel->TraceBox(cl.worldmodel, 0, &trace, start, vec3_origin, vec3_origin, end, SUPERCONTENTS_SOLID);
  41
  42         if (normal)
  43                 VectorCopy(trace.plane.normal, normal);
  44         maxfrac = trace.fraction;
  45         maxrealfrac = trace.realfraction;
  46
  47         tracemins[0] = min(start[0], end[0]);
  48         tracemaxs[0] = max(start[0], end[0]);
  49         tracemins[1] = min(start[1], end[1]);
  50         tracemaxs[1] = max(start[1], end[1]);
  51         tracemins[2] = min(start[2], end[2]);
  52         tracemaxs[2] = max(start[2], end[2]);
  53
  54         // look for embedded bmodels
  55         for (n = 0;n < cl.num_entities;n++)
  56         {
  57                 if (!cl.entities_active[n])
  58                         continue;
  59                 ent = &cl.entities[n].render;
  60                 if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
  61                         continue;
  62                 if (!ent->model || !ent->model->TraceBox)
  63                         continue;
  64                 if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
  65                         continue;
  66                 // if transparent and not selectable, skip entity
  67                 if (!(cl.entities[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
  68                         continue;
  69                 if (ent == ignoreent)
  70                         continue;
  71                 Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
  72                 Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
  73                 Collision_ClipTrace_Box(&trace, ent->model->normalmins, ent->model->normalmaxs, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID, SUPERCONTENTS_SOLID, 0, NULL);
  74 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
  75                 if(!VectorCompare(start, pEnd))
  76                         Collision_ShortenTrace(&trace, len / (len + 1), pEnd);
  77 #endif
  78                 if (maxrealfrac < trace.realfraction)
  79                         continue;
  80
  81                 ent->model->TraceBox(ent->model, ent->frameblend[0].subframe, &trace, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID);
  82
  83                 if (maxrealfrac > trace.realfraction)
  84                 {
  85                         if (hitent)
  86                                 *hitent = n;
  87                         maxfrac = trace.fraction;
  88                         maxrealfrac = trace.realfraction;
  89                         if (normal)
  90                         {
  91                                 VectorCopy(trace.plane.normal, tempnormal);
  92                                 Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
  93                         }
  94                 }
  95         }
  96         maxfrac = bound(0, maxfrac, 1);
  97         maxrealfrac = bound(0, maxrealfrac, 1);
  98         //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
  99         if (impact)
 100                 VectorLerp(start, maxfrac, end, impact);
 101         return maxfrac;
 102 }
 103
 104 void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
 105 {
 106         // FIXME: check multiple brush models
 107         if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
 108                 cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
 109 }
 110
 111 dp_model_t *CL_GetModelByIndex(int modelindex)
 112 {
 113         if(!modelindex)
 114                 return NULL;
 115         if (modelindex < 0)
 116         {
 117                 modelindex = -(modelindex+1);
 118                 if (modelindex < MAX_MODELS)
 119                         return cl.csqc_model_precache[modelindex];
 120         }
 121         else
 122         {
 123                 if(modelindex < MAX_MODELS)
 124                         return cl.model_precache[modelindex];
 125         }
 126         return NULL;
 127 }
 128
 129 dp_model_t *CL_GetModelFromEdict(prvm_edict_t *ed)
 130 {
 131         if (!ed || ed->priv.server->free)
 132                 return NULL;
 133         return CL_GetModelByIndex((int)ed->fields.client->modelindex);
 134 }
 135
 136 void CL_LinkEdict(prvm_edict_t *ent)
 137 {
 138         vec3_t mins, maxs;
 139
 140         if (ent == prog->edicts)
 141                 return;         // don't add the world
 142
 143         if (ent->priv.server->free)
 144                 return;
 145
 146         // set the abs box
 147
 148         if (ent->fields.client->solid == SOLID_BSP)
 149         {
 150                 dp_model_t *model = CL_GetModelByIndex( (int)ent->fields.client->modelindex );
 151                 if (model == NULL)
 152                 {
 153                         Con_Printf("edict %i: SOLID_BSP with invalid modelindex!\n", PRVM_NUM_FOR_EDICT(ent));
 154
 155                         model = CL_GetModelByIndex( 0 );
 156                 }
 157
 158                 if( model != NULL )
 159                 {
 160                         if (!model->TraceBox && developer.integer >= 1)
 161                                 Con_Printf("edict %i: SOLID_BSP with non-collidable model\n", PRVM_NUM_FOR_EDICT(ent));
 162
 163                         if (ent->fields.client->angles[0] || ent->fields.client->angles[2] || ent->fields.client->avelocity[0] || ent->fields.client->avelocity[2])
 164                         {
 165                                 VectorAdd(ent->fields.client->origin, model->rotatedmins, mins);
 166                                 VectorAdd(ent->fields.client->origin, model->rotatedmaxs, maxs);
 167                         }
 168                         else if (ent->fields.client->angles[1] || ent->fields.client->avelocity[1])
 169                         {
 170                                 VectorAdd(ent->fields.client->origin, model->yawmins, mins);
 171                                 VectorAdd(ent->fields.client->origin, model->yawmaxs, maxs);
 172                         }
 173                         else
 174                         {
 175                                 VectorAdd(ent->fields.client->origin, model->normalmins, mins);
 176                                 VectorAdd(ent->fields.client->origin, model->normalmaxs, maxs);
 177                         }
 178                 }
 179                 else
 180                 {
 181                         // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
 182                         VectorAdd(ent->fields.client->origin, ent->fields.client->mins, mins);
 183                         VectorAdd(ent->fields.client->origin, ent->fields.client->maxs, maxs);
 184                 }
 185         }
 186         else
 187         {
 188                 VectorAdd(ent->fields.client->origin, ent->fields.client->mins, mins);
 189                 VectorAdd(ent->fields.client->origin, ent->fields.client->maxs, maxs);
 190         }
 191
 192         VectorCopy(mins, ent->fields.client->absmin);
 193         VectorCopy(maxs, ent->fields.client->absmax);
 194
 195         World_LinkEdict(&cl.world, ent, ent->fields.client->absmin, ent->fields.client->absmax);
 196 }
 197
 198 int CL_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
 199 {
 200         prvm_eval_t *val;
 201         if (passedict)
 202         {
 203                 val = PRVM_EDICTFIELDVALUE(passedict, prog->fieldoffsets.dphitcontentsmask);
 204                 if (val && val->_float)
 205                         return (int)val->_float;
 206                 else if (passedict->fields.client->solid == SOLID_SLIDEBOX)
 207                 {
 208                         if ((int)passedict->fields.client->flags & FL_MONSTER)
 209                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
 210                         else
 211                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
 212                 }
 213                 else if (passedict->fields.client->solid == SOLID_CORPSE)
 214                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
 215                 else if (passedict->fields.client->solid == SOLID_TRIGGER)
 216                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
 217                 else
 218                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
 219         }
 220         else
 221                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
 222 }
 223
 224 /*
 225 ==================
 226 CL_Move
 227 ==================
 228 */
 229 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
 230 trace_t CL_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t pEnd, int type, prvm_edict_t *passedict, int hitsupercontentsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
 231 #else
 232 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)
 233 #endif
 234 {
 235         vec3_t hullmins, hullmaxs;
 236         int i, bodysupercontents;
 237         int passedictprog;
 238         qboolean pointtrace;
 239         prvm_edict_t *traceowner, *touch;
 240         trace_t trace;
 241         // bounding box of entire move area
 242         vec3_t clipboxmins, clipboxmaxs;
 243         // size of the moving object
 244         vec3_t clipmins, clipmaxs;
 245         // size when clipping against monsters
 246         vec3_t clipmins2, clipmaxs2;
 247         // start and end origin of move
 248         vec3_t clipstart, clipend;
 249         // trace results
 250         trace_t cliptrace;
 251         // matrices to transform into/out of other entity's space
 252         matrix4x4_t matrix, imatrix;
 253         // model of other entity
 254         dp_model_t *model;
 255         // list of entities to test for collisions
 256         int numtouchedicts;
 257         prvm_edict_t *touchedicts[MAX_EDICTS];
 258 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
 259         vec3_t end;
 260         vec_t len = 0;
 261
 262         if(!VectorCompare(start, pEnd))
 263         {
 264                 // TRICK: make the trace 1 qu longer!
 265                 VectorSubtract(pEnd, start, end);
 266                 len = VectorNormalizeLength(end);
 267                 VectorAdd(pEnd, end, end);
 268         }
 269         else
 270                 VectorCopy(pEnd, end);
 271 #endif
 272
 273         if (hitnetworkentity)
 274                 *hitnetworkentity = 0;
 275
 276         VectorCopy(start, clipstart);
 277         VectorCopy(end, clipend);
 278         VectorCopy(mins, clipmins);
 279         VectorCopy(maxs, clipmaxs);
 280         VectorCopy(mins, clipmins2);
 281         VectorCopy(maxs, clipmaxs2);
 282 #if COLLISIONPARANOID >= 3
 283         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
 284 #endif
 285
 286         // clip to world
 287         Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 288         cliptrace.bmodelstartsolid = cliptrace.startsolid;
 289         if (cliptrace.startsolid || cliptrace.fraction < 1)
 290                 cliptrace.ent = prog ? prog->edicts : NULL;
 291         if (type == MOVE_WORLDONLY)
 292                 goto finished;
 293
 294         if (type == MOVE_MISSILE)
 295         {
 296                 // LordHavoc: modified this, was = -15, now -= 15
 297                 for (i = 0;i < 3;i++)
 298                 {
 299                         clipmins2[i] -= 15;
 300                         clipmaxs2[i] += 15;
 301                 }
 302         }
 303
 304         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
 305         if (cl.worldmodel && cl.worldmodel->brush.RoundUpToHullSize)
 306                 cl.worldmodel->brush.RoundUpToHullSize(cl.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
 307         else
 308         {
 309                 VectorCopy(clipmins, hullmins);
 310                 VectorCopy(clipmaxs, hullmaxs);
 311         }
 312
 313         // create the bounding box of the entire move
 314         for (i = 0;i < 3;i++)
 315         {
 316                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
 317                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
 318         }
 319
 320         // debug override to test against everything
 321         if (sv_debugmove.integer)
 322         {
 323                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
 324                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
 325         }
 326
 327         // if the passedict is world, make it NULL (to avoid two checks each time)
 328         // this checks prog because this function is often called without a CSQC
 329         // VM context
 330         if (prog == NULL || passedict == prog->edicts)
 331                 passedict = NULL;
 332         // precalculate prog value for passedict for comparisons
 333         passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
 334         // figure out whether this is a point trace for comparisons
 335         pointtrace = VectorCompare(clipmins, clipmaxs);
 336         // precalculate passedict's owner edict pointer for comparisons
 337         traceowner = passedict ? PRVM_PROG_TO_EDICT(passedict->fields.client->owner) : NULL;
 338
 339         // collide against network entities
 340         if (hitnetworkbrushmodels)
 341         {
 342                 for (i = 0;i < cl.num_brushmodel_entities;i++)
 343                 {
 344                         entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
 345                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
 346                                 continue;
 347                         Collision_ClipToGenericEntity(&trace, ent->model, ent->frameblend[0].subframe, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask);
 348                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 349                                 *hitnetworkentity = cl.brushmodel_entities[i];
 350                         Collision_CombineTraces(&cliptrace, &trace, NULL, true);
 351                 }
 352         }
 353
 354         // collide against player entities
 355         if (hitnetworkplayers)
 356         {
 357                 vec3_t origin, entmins, entmaxs;
 358                 matrix4x4_t entmatrix, entinversematrix;
 359
 360                 if(gamemode == GAME_NEXUIZ)
 361                 {
 362                         // don't hit network players, if we are a nonsolid player
 363                         if(cl.scores[cl.playerentity-1].frags == -666 || cl.scores[cl.playerentity-1].frags == -616)
 364                                 goto skipnetworkplayers;
 365                 }
 366
 367                 for (i = 1;i <= cl.maxclients;i++)
 368                 {
 369                         entity_render_t *ent = &cl.entities[i].render;
 370
 371                         // don't hit ourselves
 372                         if (i == cl.playerentity)
 373                                 continue;
 374
 375                         // don't hit players that don't exist
 376                         if (!cl.scores[i-1].name[0])
 377                                 continue;
 378
 379                         if(gamemode == GAME_NEXUIZ)
 380                         {
 381                                 // don't hit spectators or nonsolid players
 382                                 if(cl.scores[i-1].frags == -666 || cl.scores[i-1].frags == -616)
 383                                         continue;
 384                         }
 385
 386                         Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
 387                         VectorAdd(origin, cl.playerstandmins, entmins);
 388                         VectorAdd(origin, cl.playerstandmaxs, entmaxs);
 389                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
 390                                 continue;
 391                         Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
 392                         Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
 393                         Collision_ClipToGenericEntity(&trace, NULL, 0, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask);
 394                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 395                                 *hitnetworkentity = i;
 396                         Collision_CombineTraces(&cliptrace, &trace, NULL, false);
 397                 }
 398
 399 skipnetworkplayers:
 400                 ;
 401         }
 402
 403         // clip to entities
 404         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 405         // the clip region, so we can skip culling checks in the loop below
 406         // note: if prog is NULL then there won't be any linked entities
 407         numtouchedicts = 0;
 408         if (hitcsqcentities && prog != NULL)
 409         {
 410                 numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 411                 if (numtouchedicts > MAX_EDICTS)
 412                 {
 413                         // this never happens
 414                         Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 415                         numtouchedicts = MAX_EDICTS;
 416                 }
 417         }
 418         for (i = 0;i < numtouchedicts;i++)
 419         {
 420                 touch = touchedicts[i];
 421
 422                 if (touch->fields.client->solid < SOLID_BBOX)
 423                         continue;
 424                 if (type == MOVE_NOMONSTERS && touch->fields.client->solid != SOLID_BSP)
 425                         continue;
 426
 427                 if (passedict)
 428                 {
 429                         // don't clip against self
 430                         if (passedict == touch)
 431                                 continue;
 432                         // don't clip owned entities against owner
 433                         if (traceowner == touch)
 434                                 continue;
 435                         // don't clip owner against owned entities
 436                         if (passedictprog == touch->fields.client->owner)
 437                                 continue;
 438                         // don't clip points against points (they can't collide)
 439                         if (pointtrace && VectorCompare(touch->fields.client->mins, touch->fields.client->maxs) && (type != MOVE_MISSILE || !((int)touch->fields.client->flags & FL_MONSTER)))
 440                                 continue;
 441                 }
 442
 443                 bodysupercontents = touch->fields.client->solid == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 444
 445                 // might interact, so do an exact clip
 446                 model = NULL;
 447                 if ((int) touch->fields.client->solid == SOLID_BSP || type == MOVE_HITMODEL)
 448                 {
 449                         unsigned int modelindex = (unsigned int)touch->fields.client->modelindex;
 450                         // if the modelindex is 0, it shouldn't be SOLID_BSP!
 451                         if (modelindex > 0 && modelindex < MAX_MODELS)
 452                                 model = cl.model_precache[(int)touch->fields.client->modelindex];
 453                 }
 454                 if (model)
 455                         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);
 456                 else
 457                         Matrix4x4_CreateTranslate(&matrix, touch->fields.client->origin[0], touch->fields.client->origin[1], touch->fields.client->origin[2]);
 458                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 459                 if ((int)touch->fields.client->flags & FL_MONSTER)
 460                         Collision_ClipToGenericEntity(&trace, model, (int) touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
 461                 else
 462                         Collision_ClipToGenericEntity(&trace, model, (int) touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 463
 464                 if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 465                         *hitnetworkentity = 0;
 466                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, touch->fields.client->solid == SOLID_BSP);
 467         }
 468
 469 finished:
 470 #ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
 471         if(!VectorCompare(start, pEnd))
 472                 Collision_ShortenTrace(&cliptrace, len / (len + 1), pEnd);
 473 #endif
 474         return cliptrace;
 475 }