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