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