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].frame, &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 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 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         if (ent == prog->edicts)
 118                 return;         // don't add the world
 119
 120         if (ent->priv.server->free)
 121                 return;
 122
 123         VectorAdd(ent->fields.client->origin, ent->fields.client->mins, ent->fields.client->absmin);
 124         VectorAdd(ent->fields.client->origin, ent->fields.client->maxs, ent->fields.client->absmax);
 125
 126         World_LinkEdict(&cl.world, ent, ent->fields.client->absmin, ent->fields.client->absmax);
 127 }
 128
 129 int CL_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
 130 {
 131         prvm_eval_t *val;
 132         if (passedict)
 133         {
 134                 val = PRVM_EDICTFIELDVALUE(passedict, prog->fieldoffsets.dphitcontentsmask);
 135                 if (val && val->_float)
 136                         return (int)val->_float;
 137                 else if (passedict->fields.client->solid == SOLID_SLIDEBOX)
 138                 {
 139                         if ((int)passedict->fields.client->flags & FL_MONSTER)
 140                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
 141                         else
 142                                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
 143                 }
 144                 else if (passedict->fields.client->solid == SOLID_CORPSE)
 145                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
 146                 else if (passedict->fields.client->solid == SOLID_TRIGGER)
 147                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
 148                 else
 149                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
 150         }
 151         else
 152                 return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
 153 }
 154
 155 /*
 156 ==================
 157 CL_Move
 158 ==================
 159 */
 160 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)
 161 {
 162         vec3_t hullmins, hullmaxs;
 163         int i, bodysupercontents;
 164         int passedictprog;
 165         qboolean pointtrace;
 166         prvm_edict_t *traceowner, *touch;
 167         trace_t trace;
 168         // bounding box of entire move area
 169         vec3_t clipboxmins, clipboxmaxs;
 170         // size of the moving object
 171         vec3_t clipmins, clipmaxs;
 172         // size when clipping against monsters
 173         vec3_t clipmins2, clipmaxs2;
 174         // start and end origin of move
 175         vec3_t clipstart, clipend;
 176         // trace results
 177         trace_t cliptrace;
 178         // matrices to transform into/out of other entity's space
 179         matrix4x4_t matrix, imatrix;
 180         // model of other entity
 181         model_t *model;
 182         // list of entities to test for collisions
 183         int numtouchedicts;
 184         prvm_edict_t *touchedicts[MAX_EDICTS];
 185
 186         if (hitnetworkentity)
 187                 *hitnetworkentity = 0;
 188
 189         VectorCopy(start, clipstart);
 190         VectorCopy(end, clipend);
 191         VectorCopy(mins, clipmins);
 192         VectorCopy(maxs, clipmaxs);
 193         VectorCopy(mins, clipmins2);
 194         VectorCopy(maxs, clipmaxs2);
 195 #if COLLISIONPARANOID >= 3
 196         Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
 197 #endif
 198
 199         // clip to world
 200         Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 201         cliptrace.bmodelstartsolid = cliptrace.startsolid;
 202         if (cliptrace.startsolid || cliptrace.fraction < 1)
 203                 cliptrace.ent = prog ? prog->edicts : NULL;
 204         if (type == MOVE_WORLDONLY)
 205                 return cliptrace;
 206
 207         if (type == MOVE_MISSILE)
 208         {
 209                 // LordHavoc: modified this, was = -15, now -= 15
 210                 for (i = 0;i < 3;i++)
 211                 {
 212                         clipmins2[i] -= 15;
 213                         clipmaxs2[i] += 15;
 214                 }
 215         }
 216
 217         // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
 218         if (cl.worldmodel && cl.worldmodel->brush.RoundUpToHullSize)
 219                 cl.worldmodel->brush.RoundUpToHullSize(cl.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
 220         else
 221         {
 222                 VectorCopy(clipmins, hullmins);
 223                 VectorCopy(clipmaxs, hullmaxs);
 224         }
 225
 226         // create the bounding box of the entire move
 227         for (i = 0;i < 3;i++)
 228         {
 229                 clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
 230                 clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
 231         }
 232
 233         // debug override to test against everything
 234         if (sv_debugmove.integer)
 235         {
 236                 clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
 237                 clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
 238         }
 239
 240         // if the passedict is world, make it NULL (to avoid two checks each time)
 241         // this checks prog because this function is often called without a CSQC
 242         // VM context
 243         if (prog == NULL || passedict == prog->edicts)
 244                 passedict = NULL;
 245         // precalculate prog value for passedict for comparisons
 246         passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
 247         // figure out whether this is a point trace for comparisons
 248         pointtrace = VectorCompare(clipmins, clipmaxs);
 249         // precalculate passedict's owner edict pointer for comparisons
 250         traceowner = passedict ? PRVM_PROG_TO_EDICT(passedict->fields.client->owner) : 0;
 251
 252         // collide against network entities
 253         if (hitnetworkbrushmodels)
 254         {
 255                 for (i = 0;i < cl.num_brushmodel_entities;i++)
 256                 {
 257                         entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
 258                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
 259                                 continue;
 260                         Collision_ClipToGenericEntity(&trace, ent->model, ent->frame2, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask);
 261                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 262                                 *hitnetworkentity = cl.brushmodel_entities[i];
 263                         Collision_CombineTraces(&cliptrace, &trace, NULL, true);
 264                 }
 265         }
 266
 267         // collide against player entities
 268         if (hitnetworkplayers)
 269         {
 270                 vec3_t origin, entmins, entmaxs;
 271                 matrix4x4_t entmatrix, entinversematrix;
 272                 for (i = 1;i < cl.maxclients+1;i++)
 273                 {
 274                         entity_render_t *ent = &cl.entities[i].render;
 275                         // don't hit ourselves
 276                         if (i == cl.playerentity)
 277                                 continue;
 278                         Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
 279                         VectorAdd(origin, cl.playerstandmins, entmins);
 280                         VectorAdd(origin, cl.playerstandmaxs, entmaxs);
 281                         if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
 282                                 continue;
 283                         Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
 284                         Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
 285                         Collision_ClipToGenericEntity(&trace, NULL, 0, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask);
 286                         if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 287                                 *hitnetworkentity = i;
 288                         Collision_CombineTraces(&cliptrace, &trace, NULL, false);
 289                 }
 290         }
 291
 292         // clip to entities
 293         // because this uses World_EntitiestoBox, we know all entity boxes overlap
 294         // the clip region, so we can skip culling checks in the loop below
 295         // note: if prog is NULL then there won't be any linked entities
 296         numtouchedicts = 0;
 297         if (hitcsqcentities && prog != NULL)
 298         {
 299                 numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
 300                 if (numtouchedicts > MAX_EDICTS)
 301                 {
 302                         // this never happens
 303                         Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
 304                         numtouchedicts = MAX_EDICTS;
 305                 }
 306         }
 307         for (i = 0;i < numtouchedicts;i++)
 308         {
 309                 touch = touchedicts[i];
 310
 311                 if (touch->fields.client->solid < SOLID_BBOX)
 312                         continue;
 313                 if (type == MOVE_NOMONSTERS && touch->fields.client->solid != SOLID_BSP)
 314                         continue;
 315
 316                 if (passedict)
 317                 {
 318                         // don't clip against self
 319                         if (passedict == touch)
 320                                 continue;
 321                         // don't clip owned entities against owner
 322                         if (traceowner == touch)
 323                                 continue;
 324                         // don't clip owner against owned entities
 325                         if (passedictprog == touch->fields.client->owner)
 326                                 continue;
 327                         // don't clip points against points (they can't collide)
 328                         if (pointtrace && VectorCompare(touch->fields.client->mins, touch->fields.client->maxs) && (type != MOVE_MISSILE || !((int)touch->fields.client->flags & FL_MONSTER)))
 329                                 continue;
 330                 }
 331
 332                 bodysupercontents = touch->fields.client->solid == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;
 333
 334                 // might interact, so do an exact clip
 335                 model = NULL;
 336                 if ((int) touch->fields.client->solid == SOLID_BSP || type == MOVE_HITMODEL)
 337                 {
 338                         unsigned int modelindex = (unsigned int)touch->fields.client->modelindex;
 339                         // if the modelindex is 0, it shouldn't be SOLID_BSP!
 340                         if (modelindex > 0 && modelindex < MAX_MODELS)
 341                                 model = cl.model_precache[(int)touch->fields.client->modelindex];
 342                 }
 343                 if (model)
 344                         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);
 345                 else
 346                         Matrix4x4_CreateTranslate(&matrix, touch->fields.client->origin[0], touch->fields.client->origin[1], touch->fields.client->origin[2]);
 347                 Matrix4x4_Invert_Simple(&imatrix, &matrix);
 348                 if ((int)touch->fields.client->flags & FL_MONSTER)
 349                         Collision_ClipToGenericEntity(&trace, model, touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
 350                 else
 351                         Collision_ClipToGenericEntity(&trace, model, touch->fields.client->frame, touch->fields.client->mins, touch->fields.client->maxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
 352
 353                 if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
 354                         *hitnetworkentity = 0;
 355                 Collision_CombineTraces(&cliptrace, &trace, (void *)touch, touch->fields.client->solid == SOLID_BSP);
 356         }
 357
 358         return cliptrace;
 359 }