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cl_collision.c

#include "quakedef.h"
#include "cl_collision.h"

#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
float CL_SelectTraceLine(const vec3_t start, const vec3_t pEnd, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
#else
float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, vec3_t normal, int *hitent, entity_render_t *ignoreent)
#endif
{
      float maxfrac, maxrealfrac;
      int n;
      entity_render_t *ent;
      float tracemins[3], tracemaxs[3];
      trace_t trace;
      float tempnormal[3], starttransformed[3], endtransformed[3];
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
      vec3_t end;
      vec_t len = 0;

      if(!VectorCompare(start, pEnd) && collision_endposnudge.value > 0)
      {
            // TRICK: make the trace 1 qu longer!
            VectorSubtract(pEnd, start, end);
            len = VectorNormalizeLength(end);
            VectorMA(pEnd, collision_endposnudge.value, end, end);
      }
      else
            VectorCopy(pEnd, end);
#endif

      memset (&trace, 0 , sizeof(trace_t));
      trace.fraction = 1;
      trace.realfraction = 1;
      VectorCopy (end, trace.endpos);

      if (hitent)
            *hitent = 0;
      if (cl.worldmodel && cl.worldmodel->TraceLine)
            cl.worldmodel->TraceLine(cl.worldmodel, NULL, NULL, &trace, start, end, SUPERCONTENTS_SOLID);

      if (normal)
            VectorCopy(trace.plane.normal, normal);
      maxfrac = trace.fraction;
      maxrealfrac = trace.realfraction;

      tracemins[0] = min(start[0], end[0]);
      tracemaxs[0] = max(start[0], end[0]);
      tracemins[1] = min(start[1], end[1]);
      tracemaxs[1] = max(start[1], end[1]);
      tracemins[2] = min(start[2], end[2]);
      tracemaxs[2] = max(start[2], end[2]);

      // look for embedded bmodels
      for (n = 0;n < cl.num_entities;n++)
      {
            if (!cl.entities_active[n])
                  continue;
            ent = &cl.entities[n].render;
            if (!BoxesOverlap(ent->mins, ent->maxs, tracemins, tracemaxs))
                  continue;
            if (!ent->model || !ent->model->TraceLine)
                  continue;
            if ((ent->flags & RENDER_EXTERIORMODEL) && !chase_active.integer)
                  continue;
            // if transparent and not selectable, skip entity
            if (!(cl.entities[n].state_current.effects & EF_SELECTABLE) && (ent->alpha < 1 || (ent->effects & (EF_ADDITIVE | EF_NODEPTHTEST))))
                  continue;
            if (ent == ignoreent)
                  continue;
            Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
            Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
            Collision_ClipTrace_Box(&trace, ent->model->normalmins, ent->model->normalmaxs, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID, SUPERCONTENTS_SOLID, 0, NULL);
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
            if(!VectorCompare(start, pEnd) && collision_endposnudge.value > 0)
                  Collision_ShortenTrace(&trace, len / (len + collision_endposnudge.value), pEnd);
#endif
            if (maxrealfrac < trace.realfraction)
                  continue;

            ent->model->TraceLine(ent->model, ent->frameblend, ent->skeleton, &trace, starttransformed, endtransformed, SUPERCONTENTS_SOLID);

            if (maxrealfrac > trace.realfraction)
            {
                  if (hitent)
                        *hitent = n;
                  maxfrac = trace.fraction;
                  maxrealfrac = trace.realfraction;
                  if (normal)
                  {
                        VectorCopy(trace.plane.normal, tempnormal);
                        Matrix4x4_Transform3x3(&ent->matrix, tempnormal, normal);
                  }
            }
      }
      maxfrac = bound(0, maxfrac, 1);
      maxrealfrac = bound(0, maxrealfrac, 1);
      //if (maxfrac < 0 || maxfrac > 1) Con_Printf("fraction out of bounds %f %s:%d\n", maxfrac, __FILE__, __LINE__);
      if (impact)
            VectorLerp(start, maxfrac, end, impact);
      return maxfrac;
}

void CL_FindNonSolidLocation(const vec3_t in, vec3_t out, vec_t radius)
{
      // FIXME: check multiple brush models
      if (cl.worldmodel && cl.worldmodel->brush.FindNonSolidLocation)
            cl.worldmodel->brush.FindNonSolidLocation(cl.worldmodel, in, out, radius);
}

dp_model_t *CL_GetModelByIndex(int modelindex)
{
      if(!modelindex)
            return NULL;
      if (modelindex < 0)
      {
            modelindex = -(modelindex+1);
            if (modelindex < MAX_MODELS)
                  return cl.csqc_model_precache[modelindex];
      }
      else
      {
            if(modelindex < MAX_MODELS)
                  return cl.model_precache[modelindex];
      }
      return NULL;
}

dp_model_t *CL_GetModelFromEdict(prvm_edict_t *ed)
{
      if (!ed || ed->priv.server->free)
            return NULL;
      return CL_GetModelByIndex((int)PRVM_clientedictfloat(ed, modelindex));
}

void CL_LinkEdict(prvm_edict_t *ent)
{
      vec3_t mins, maxs;

      if (ent == prog->edicts)
            return;           // don't add the world

      if (ent->priv.server->free)
            return;

      // set the abs box

      if (PRVM_clientedictfloat(ent, solid) == SOLID_BSP)
      {
            dp_model_t *model = CL_GetModelByIndex( (int)PRVM_clientedictfloat(ent, modelindex) );
            if (model == NULL)
            {
                  Con_Printf("edict %i: SOLID_BSP with invalid modelindex!\n", PRVM_NUM_FOR_EDICT(ent));

                  model = CL_GetModelByIndex( 0 );
            }

            if( model != NULL )
            {
                  if (!model->TraceBox)
                        Con_DPrintf("edict %i: SOLID_BSP with non-collidable model\n", PRVM_NUM_FOR_EDICT(ent));

                  if (PRVM_clientedictvector(ent, angles)[0] || PRVM_clientedictvector(ent, angles)[2] || PRVM_clientedictvector(ent, avelocity)[0] || PRVM_clientedictvector(ent, avelocity)[2])
                  {
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->rotatedmins, mins);
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->rotatedmaxs, maxs);
                  }
                  else if (PRVM_clientedictvector(ent, angles)[1] || PRVM_clientedictvector(ent, avelocity)[1])
                  {
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->yawmins, mins);
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->yawmaxs, maxs);
                  }
                  else
                  {
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->normalmins, mins);
                        VectorAdd(PRVM_clientedictvector(ent, origin), model->normalmaxs, maxs);
                  }
            }
            else
            {
                  // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
                  VectorAdd(PRVM_clientedictvector(ent, origin), PRVM_clientedictvector(ent, mins), mins);
                  VectorAdd(PRVM_clientedictvector(ent, origin), PRVM_clientedictvector(ent, maxs), maxs);
            }
      }
      else
      {
            VectorAdd(PRVM_clientedictvector(ent, origin), PRVM_clientedictvector(ent, mins), mins);
            VectorAdd(PRVM_clientedictvector(ent, origin), PRVM_clientedictvector(ent, maxs), maxs);
      }

      VectorCopy(mins, PRVM_clientedictvector(ent, absmin));
      VectorCopy(maxs, PRVM_clientedictvector(ent, absmax));

      World_LinkEdict(&cl.world, ent, PRVM_clientedictvector(ent, absmin), PRVM_clientedictvector(ent, absmax));
}

int CL_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
{
      if (passedict)
      {
            int dphitcontentsmask = (int)PRVM_clientedictfloat(passedict, dphitcontentsmask);
            if (dphitcontentsmask)
                  return dphitcontentsmask;
            else if (PRVM_clientedictfloat(passedict, solid) == SOLID_SLIDEBOX)
            {
                  if ((int)PRVM_clientedictfloat(passedict, flags) & FL_MONSTER)
                        return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_MONSTERCLIP;
                  else
                        return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_PLAYERCLIP;
            }
            else if (PRVM_clientedictfloat(passedict, solid) == SOLID_CORPSE)
                  return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
            else if (PRVM_clientedictfloat(passedict, solid) == SOLID_TRIGGER)
                  return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY;
            else
                  return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
      }
      else
            return SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY | SUPERCONTENTS_CORPSE;
}

/*
==================
CL_Move
==================
*/
trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int hitsupercontentsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
{
      int i, bodysupercontents;
      int passedictprog;
      prvm_edict_t *traceowner, *touch;
      trace_t trace;
      // bounding box of entire move area
      vec3_t clipboxmins, clipboxmaxs;
      // size when clipping against monsters
      vec3_t clipmins2, clipmaxs2;
      // start and end origin of move
      vec3_t clipstart;
      // trace results
      trace_t cliptrace;
      // matrices to transform into/out of other entity's space
      matrix4x4_t matrix, imatrix;
      // model of other entity
      dp_model_t *model;
      // list of entities to test for collisions
      int numtouchedicts;
      static prvm_edict_t *touchedicts[MAX_EDICTS];

      if (hitnetworkentity)
            *hitnetworkentity = 0;

      VectorCopy(start, clipstart);
      VectorClear(clipmins2);
      VectorClear(clipmaxs2);
#if COLLISIONPARANOID >= 3
      Con_Printf("move(%f %f %f)", clipstart[0], clipstart[1], clipstart[2]);
#endif

      // clip to world
      Collision_ClipPointToWorld(&cliptrace, cl.worldmodel, clipstart, hitsupercontentsmask);
      cliptrace.bmodelstartsolid = cliptrace.startsolid;
      if (cliptrace.startsolid || cliptrace.fraction < 1)
            cliptrace.ent = prog ? prog->edicts : NULL;
      if (type == MOVE_WORLDONLY)
            goto finished;

      if (type == MOVE_MISSILE)
      {
            // LordHavoc: modified this, was = -15, now -= 15
            for (i = 0;i < 3;i++)
            {
                  clipmins2[i] -= 15;
                  clipmaxs2[i] += 15;
            }
      }

      // create the bounding box of the entire move
      for (i = 0;i < 3;i++)
      {
            clipboxmins[i] = clipstart[i] - 1;
            clipboxmaxs[i] = clipstart[i] + 1;
      }

      // debug override to test against everything
      if (sv_debugmove.integer)
      {
            clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
            clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
      }

      // if the passedict is world, make it NULL (to avoid two checks each time)
      // this checks prog because this function is often called without a CSQC
      // VM context
      if (prog == NULL || passedict == prog->edicts)
            passedict = NULL;
      // precalculate prog value for passedict for comparisons
      passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
      // precalculate passedict's owner edict pointer for comparisons
      traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_clientedictedict(passedict, owner)) : NULL;

      // collide against network entities
      if (hitnetworkbrushmodels)
      {
            for (i = 0;i < cl.num_brushmodel_entities;i++)
            {
                  entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                        continue;
                  Collision_ClipPointToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, hitsupercontentsmask);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = cl.brushmodel_entities[i];
                  Collision_CombineTraces(&cliptrace, &trace, NULL, true);
            }
      }

      // collide against player entities
      if (hitnetworkplayers)
      {
            vec3_t origin, entmins, entmaxs;
            matrix4x4_t entmatrix, entinversematrix;

            if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
            {
                  // don't hit network players, if we are a nonsolid player
                  if(cl.scores[cl.playerentity-1].frags == -666 || cl.scores[cl.playerentity-1].frags == -616)
                        goto skipnetworkplayers;
            }

            for (i = 1;i <= cl.maxclients;i++)
            {
                  entity_render_t *ent = &cl.entities[i].render;

                  // don't hit ourselves
                  if (i == cl.playerentity)
                        continue;

                  // don't hit players that don't exist
                  if (!cl.scores[i-1].name[0])
                        continue;

                  if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
                  {
                        // don't hit spectators or nonsolid players
                        if(cl.scores[i-1].frags == -666 || cl.scores[i-1].frags == -616)
                              continue;
                  }

                  Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
                  VectorAdd(origin, cl.playerstandmins, entmins);
                  VectorAdd(origin, cl.playerstandmaxs, entmaxs);
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
                        continue;
                  Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                  Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
                  Collision_ClipPointToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, hitsupercontentsmask);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = i;
                  Collision_CombineTraces(&cliptrace, &trace, NULL, false);
            }

skipnetworkplayers:
            ;
      }

      // clip to entities
      // because this uses World_EntitiestoBox, we know all entity boxes overlap
      // the clip region, so we can skip culling checks in the loop below
      // note: if prog is NULL then there won't be any linked entities
      numtouchedicts = 0;
      if (hitcsqcentities && prog != NULL)
      {
            numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
            if (numtouchedicts > MAX_EDICTS)
            {
                  // this never happens
                  Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
                  numtouchedicts = MAX_EDICTS;
            }
      }
      for (i = 0;i < numtouchedicts;i++)
      {
            touch = touchedicts[i];

            if (PRVM_clientedictfloat(touch, solid) < SOLID_BBOX)
                  continue;
            if (type == MOVE_NOMONSTERS && PRVM_clientedictfloat(touch, solid) != SOLID_BSP)
                  continue;

            if (passedict)
            {
                  // don't clip against self
                  if (passedict == touch)
                        continue;
                  // don't clip owned entities against owner
                  if (traceowner == touch)
                        continue;
                  // don't clip owner against owned entities
                  if (passedictprog == PRVM_clientedictedict(touch, owner))
                        continue;
                  // don't clip points against points (they can't collide)
                  if (VectorCompare(PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)))
                        continue;
            }

            bodysupercontents = PRVM_clientedictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;

            // might interact, so do an exact clip
            model = NULL;
            if ((int) PRVM_clientedictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
                  model = CL_GetModelFromEdict(touch);
            if (model)
                  Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2], PRVM_clientedictvector(touch, angles)[0], PRVM_clientedictvector(touch, angles)[1], PRVM_clientedictvector(touch, angles)[2], 1);
            else
                  Matrix4x4_CreateTranslate(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2]);
            Matrix4x4_Invert_Simple(&imatrix, &matrix);
            if ((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
                  Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipstart, hitsupercontentsmask);
            else
                  Collision_ClipPointToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, hitsupercontentsmask);

            if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                  *hitnetworkentity = 0;
            Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_clientedictfloat(touch, solid) == SOLID_BSP);
      }

finished:
      return cliptrace;
}

/*
==================
CL_TraceLine
==================
*/
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
trace_t CL_TraceLine(const vec3_t start, const vec3_t pEnd, int type, prvm_edict_t *passedict, int hitsupercontentsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities, qboolean hitsurfaces)
#else
trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities, qboolean hitsurfaces)
#endif
{
      int i, bodysupercontents;
      int passedictprog;
      prvm_edict_t *traceowner, *touch;
      trace_t trace;
      // bounding box of entire move area
      vec3_t clipboxmins, clipboxmaxs;
      // size when clipping against monsters
      vec3_t clipmins2, clipmaxs2;
      // start and end origin of move
      vec3_t clipstart, clipend;
      // trace results
      trace_t cliptrace;
      // matrices to transform into/out of other entity's space
      matrix4x4_t matrix, imatrix;
      // model of other entity
      dp_model_t *model;
      // list of entities to test for collisions
      int numtouchedicts;
      static prvm_edict_t *touchedicts[MAX_EDICTS];
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
      vec3_t end;
      vec_t len = 0;

      if (VectorCompare(start, pEnd))
            return CL_TracePoint(start, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);

      if(collision_endposnudge.value > 0)
      {
            // TRICK: make the trace 1 qu longer!
            VectorSubtract(pEnd, start, end);
            len = VectorNormalizeLength(end);
            VectorMA(pEnd, collision_endposnudge.value, end, end);
      }
      else
            VectorCopy(pEnd, end);
#else
      if (VectorCompare(start, end))
            return CL_TracePoint(start, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
#endif

      if (hitnetworkentity)
            *hitnetworkentity = 0;

      VectorCopy(start, clipstart);
      VectorCopy(end, clipend);
      VectorClear(clipmins2);
      VectorClear(clipmaxs2);
#if COLLISIONPARANOID >= 3
      Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
#endif

      // clip to world
      Collision_ClipLineToWorld(&cliptrace, cl.worldmodel, clipstart, clipend, hitsupercontentsmask, hitsurfaces);
      cliptrace.bmodelstartsolid = cliptrace.startsolid;
      if (cliptrace.startsolid || cliptrace.fraction < 1)
            cliptrace.ent = prog ? prog->edicts : NULL;
      if (type == MOVE_WORLDONLY)
            goto finished;

      if (type == MOVE_MISSILE)
      {
            // LordHavoc: modified this, was = -15, now -= 15
            for (i = 0;i < 3;i++)
            {
                  clipmins2[i] -= 15;
                  clipmaxs2[i] += 15;
            }
      }

      // create the bounding box of the entire move
      for (i = 0;i < 3;i++)
      {
            clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + clipmins2[i] - 1;
            clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + clipmaxs2[i] + 1;
      }

      // debug override to test against everything
      if (sv_debugmove.integer)
      {
            clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
            clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
      }

      // if the passedict is world, make it NULL (to avoid two checks each time)
      // this checks prog because this function is often called without a CSQC
      // VM context
      if (prog == NULL || passedict == prog->edicts)
            passedict = NULL;
      // precalculate prog value for passedict for comparisons
      passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
      // precalculate passedict's owner edict pointer for comparisons
      traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_clientedictedict(passedict, owner)) : NULL;

      // collide against network entities
      if (hitnetworkbrushmodels)
      {
            for (i = 0;i < cl.num_brushmodel_entities;i++)
            {
                  entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                        continue;
                  Collision_ClipLineToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, end, hitsupercontentsmask, hitsurfaces);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = cl.brushmodel_entities[i];
                  Collision_CombineTraces(&cliptrace, &trace, NULL, true);
            }
      }

      // collide against player entities
      if (hitnetworkplayers)
      {
            vec3_t origin, entmins, entmaxs;
            matrix4x4_t entmatrix, entinversematrix;

            if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
            {
                  // don't hit network players, if we are a nonsolid player
                  if(cl.scores[cl.playerentity-1].frags == -666 || cl.scores[cl.playerentity-1].frags == -616)
                        goto skipnetworkplayers;
            }

            for (i = 1;i <= cl.maxclients;i++)
            {
                  entity_render_t *ent = &cl.entities[i].render;

                  // don't hit ourselves
                  if (i == cl.playerentity)
                        continue;

                  // don't hit players that don't exist
                  if (!cl.scores[i-1].name[0])
                        continue;

                  if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
                  {
                        // don't hit spectators or nonsolid players
                        if(cl.scores[i-1].frags == -666 || cl.scores[i-1].frags == -616)
                              continue;
                  }

                  Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
                  VectorAdd(origin, cl.playerstandmins, entmins);
                  VectorAdd(origin, cl.playerstandmaxs, entmaxs);
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
                        continue;
                  Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                  Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
                  Collision_ClipLineToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, end, hitsupercontentsmask, hitsurfaces);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = i;
                  Collision_CombineTraces(&cliptrace, &trace, NULL, false);
            }

skipnetworkplayers:
            ;
      }

      // clip to entities
      // because this uses World_EntitiestoBox, we know all entity boxes overlap
      // the clip region, so we can skip culling checks in the loop below
      // note: if prog is NULL then there won't be any linked entities
      numtouchedicts = 0;
      if (hitcsqcentities && prog != NULL)
      {
            numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
            if (numtouchedicts > MAX_EDICTS)
            {
                  // this never happens
                  Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
                  numtouchedicts = MAX_EDICTS;
            }
      }
      for (i = 0;i < numtouchedicts;i++)
      {
            touch = touchedicts[i];

            if (PRVM_clientedictfloat(touch, solid) < SOLID_BBOX)
                  continue;
            if (type == MOVE_NOMONSTERS && PRVM_clientedictfloat(touch, solid) != SOLID_BSP)
                  continue;

            if (passedict)
            {
                  // don't clip against self
                  if (passedict == touch)
                        continue;
                  // don't clip owned entities against owner
                  if (traceowner == touch)
                        continue;
                  // don't clip owner against owned entities
                  if (passedictprog == PRVM_clientedictedict(touch, owner))
                        continue;
                  // don't clip points against points (they can't collide)
                  if (VectorCompare(PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)))
                        continue;
            }

            bodysupercontents = PRVM_clientedictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;

            // might interact, so do an exact clip
            model = NULL;
            if ((int) PRVM_clientedictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
                  model = CL_GetModelFromEdict(touch);
            if (model)
                  Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2], PRVM_clientedictvector(touch, angles)[0], PRVM_clientedictvector(touch, angles)[1], PRVM_clientedictvector(touch, angles)[2], 1);
            else
                  Matrix4x4_CreateTranslate(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2]);
            Matrix4x4_Invert_Simple(&imatrix, &matrix);
            if (type == MOVE_MISSILE && (int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
                  Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
            else
                  Collision_ClipLineToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask, hitsurfaces);

            if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                  *hitnetworkentity = 0;
            Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_clientedictfloat(touch, solid) == SOLID_BSP);
      }

finished:
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
      if(!VectorCompare(start, pEnd) && collision_endposnudge.value > 0)
            Collision_ShortenTrace(&cliptrace, len / (len + collision_endposnudge.value), pEnd);
#endif
      return cliptrace;
}

/*
==================
CL_Move
==================
*/
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
trace_t CL_TraceBox(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)
#else
trace_t CL_TraceBox(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)
#endif
{
      vec3_t hullmins, hullmaxs;
      int i, bodysupercontents;
      int passedictprog;
      qboolean pointtrace;
      prvm_edict_t *traceowner, *touch;
      trace_t trace;
      // bounding box of entire move area
      vec3_t clipboxmins, clipboxmaxs;
      // size of the moving object
      vec3_t clipmins, clipmaxs;
      // size when clipping against monsters
      vec3_t clipmins2, clipmaxs2;
      // start and end origin of move
      vec3_t clipstart, clipend;
      // trace results
      trace_t cliptrace;
      // matrices to transform into/out of other entity's space
      matrix4x4_t matrix, imatrix;
      // model of other entity
      dp_model_t *model;
      // list of entities to test for collisions
      int numtouchedicts;
      static prvm_edict_t *touchedicts[MAX_EDICTS];
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
      vec3_t end;
      vec_t len = 0;

      if (VectorCompare(mins, maxs))
      {
            vec3_t shiftstart, shiftend;
            VectorAdd(start, mins, shiftstart);
            VectorAdd(pEnd, mins, shiftend);
            if (VectorCompare(start, pEnd))
                  trace = CL_TracePoint(shiftstart, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
            else
                  trace = CL_TraceLine(shiftstart, shiftend, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities, false);
            VectorSubtract(trace.endpos, mins, trace.endpos);
            return trace;
      }

      if(!VectorCompare(start, pEnd) && collision_endposnudge.value > 0)
      {
            // TRICK: make the trace 1 qu longer!
            VectorSubtract(pEnd, start, end);
            len = VectorNormalizeLength(end);
            VectorMA(pEnd, collision_endposnudge.value, end, end);
      }
      else
            VectorCopy(pEnd, end);
#else
      if (VectorCompare(mins, maxs))
      {
            vec3_t shiftstart, shiftend;
            VectorAdd(start, mins, shiftstart);
            VectorAdd(end, mins, shiftend);
            if (VectorCompare(start, end))
                  trace = CL_TracePoint(shiftstart, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
            else
                  trace = CL_TraceLine(shiftstart, shiftend, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities, false);
            VectorSubtract(trace.endpos, mins, trace.endpos);
            return trace;
      }
#endif

      if (hitnetworkentity)
            *hitnetworkentity = 0;

      VectorCopy(start, clipstart);
      VectorCopy(end, clipend);
      VectorCopy(mins, clipmins);
      VectorCopy(maxs, clipmaxs);
      VectorCopy(mins, clipmins2);
      VectorCopy(maxs, clipmaxs2);
#if COLLISIONPARANOID >= 3
      Con_Printf("move(%f %f %f,%f %f %f)", clipstart[0], clipstart[1], clipstart[2], clipend[0], clipend[1], clipend[2]);
#endif

      // clip to world
      Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);
      cliptrace.bmodelstartsolid = cliptrace.startsolid;
      if (cliptrace.startsolid || cliptrace.fraction < 1)
            cliptrace.ent = prog ? prog->edicts : NULL;
      if (type == MOVE_WORLDONLY)
            goto finished;

      if (type == MOVE_MISSILE)
      {
            // LordHavoc: modified this, was = -15, now -= 15
            for (i = 0;i < 3;i++)
            {
                  clipmins2[i] -= 15;
                  clipmaxs2[i] += 15;
            }
      }

      // get adjusted box for bmodel collisions if the world is q1bsp or hlbsp
      if (cl.worldmodel && cl.worldmodel->brush.RoundUpToHullSize)
            cl.worldmodel->brush.RoundUpToHullSize(cl.worldmodel, clipmins, clipmaxs, hullmins, hullmaxs);
      else
      {
            VectorCopy(clipmins, hullmins);
            VectorCopy(clipmaxs, hullmaxs);
      }

      // create the bounding box of the entire move
      for (i = 0;i < 3;i++)
      {
            clipboxmins[i] = min(clipstart[i], cliptrace.endpos[i]) + min(hullmins[i], clipmins2[i]) - 1;
            clipboxmaxs[i] = max(clipstart[i], cliptrace.endpos[i]) + max(hullmaxs[i], clipmaxs2[i]) + 1;
      }

      // debug override to test against everything
      if (sv_debugmove.integer)
      {
            clipboxmins[0] = clipboxmins[1] = clipboxmins[2] = -999999999;
            clipboxmaxs[0] = clipboxmaxs[1] = clipboxmaxs[2] =  999999999;
      }

      // if the passedict is world, make it NULL (to avoid two checks each time)
      // this checks prog because this function is often called without a CSQC
      // VM context
      if (prog == NULL || passedict == prog->edicts)
            passedict = NULL;
      // precalculate prog value for passedict for comparisons
      passedictprog = prog != NULL ? PRVM_EDICT_TO_PROG(passedict) : 0;
      // figure out whether this is a point trace for comparisons
      pointtrace = VectorCompare(clipmins, clipmaxs);
      // precalculate passedict's owner edict pointer for comparisons
      traceowner = passedict ? PRVM_PROG_TO_EDICT(PRVM_clientedictedict(passedict, owner)) : NULL;

      // collide against network entities
      if (hitnetworkbrushmodels)
      {
            for (i = 0;i < cl.num_brushmodel_entities;i++)
            {
                  entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                        continue;
                  Collision_ClipToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = cl.brushmodel_entities[i];
                  Collision_CombineTraces(&cliptrace, &trace, NULL, true);
            }
      }

      // collide against player entities
      if (hitnetworkplayers)
      {
            vec3_t origin, entmins, entmaxs;
            matrix4x4_t entmatrix, entinversematrix;

            if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
            {
                  // don't hit network players, if we are a nonsolid player
                  if(cl.scores[cl.playerentity-1].frags == -666 || cl.scores[cl.playerentity-1].frags == -616)
                        goto skipnetworkplayers;
            }

            for (i = 1;i <= cl.maxclients;i++)
            {
                  entity_render_t *ent = &cl.entities[i].render;

                  // don't hit ourselves
                  if (i == cl.playerentity)
                        continue;

                  // don't hit players that don't exist
                  if (!cl.scores[i-1].name[0])
                        continue;

                  if(gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC)
                  {
                        // don't hit spectators or nonsolid players
                        if(cl.scores[i-1].frags == -666 || cl.scores[i-1].frags == -616)
                              continue;
                  }

                  Matrix4x4_OriginFromMatrix(&ent->matrix, origin);
                  VectorAdd(origin, cl.playerstandmins, entmins);
                  VectorAdd(origin, cl.playerstandmaxs, entmaxs);
                  if (!BoxesOverlap(clipboxmins, clipboxmaxs, entmins, entmaxs))
                        continue;
                  Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                  Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
                  Collision_ClipToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask);
                  if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                        *hitnetworkentity = i;
                  Collision_CombineTraces(&cliptrace, &trace, NULL, false);
            }

skipnetworkplayers:
            ;
      }

      // clip to entities
      // because this uses World_EntitiestoBox, we know all entity boxes overlap
      // the clip region, so we can skip culling checks in the loop below
      // note: if prog is NULL then there won't be any linked entities
      numtouchedicts = 0;
      if (hitcsqcentities && prog != NULL)
      {
            numtouchedicts = World_EntitiesInBox(&cl.world, clipboxmins, clipboxmaxs, MAX_EDICTS, touchedicts);
            if (numtouchedicts > MAX_EDICTS)
            {
                  // this never happens
                  Con_Printf("CL_EntitiesInBox returned %i edicts, max was %i\n", numtouchedicts, MAX_EDICTS);
                  numtouchedicts = MAX_EDICTS;
            }
      }
      for (i = 0;i < numtouchedicts;i++)
      {
            touch = touchedicts[i];

            if (PRVM_clientedictfloat(touch, solid) < SOLID_BBOX)
                  continue;
            if (type == MOVE_NOMONSTERS && PRVM_clientedictfloat(touch, solid) != SOLID_BSP)
                  continue;

            if (passedict)
            {
                  // don't clip against self
                  if (passedict == touch)
                        continue;
                  // don't clip owned entities against owner
                  if (traceowner == touch)
                        continue;
                  // don't clip owner against owned entities
                  if (passedictprog == PRVM_clientedictedict(touch, owner))
                        continue;
                  // don't clip points against points (they can't collide)
                  if (pointtrace && VectorCompare(PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs)) && (type != MOVE_MISSILE || !((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)))
                        continue;
            }

            bodysupercontents = PRVM_clientedictfloat(touch, solid) == SOLID_CORPSE ? SUPERCONTENTS_CORPSE : SUPERCONTENTS_BODY;

            // might interact, so do an exact clip
            model = NULL;
            if ((int) PRVM_clientedictfloat(touch, solid) == SOLID_BSP || type == MOVE_HITMODEL)
                  model = CL_GetModelFromEdict(touch);
            if (model)
                  Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2], PRVM_clientedictvector(touch, angles)[0], PRVM_clientedictvector(touch, angles)[1], PRVM_clientedictvector(touch, angles)[2], 1);
            else
                  Matrix4x4_CreateTranslate(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2]);
            Matrix4x4_Invert_Simple(&imatrix, &matrix);
            if ((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
                  Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask);
            else
                  Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, PRVM_clientedictvector(touch, mins), PRVM_clientedictvector(touch, maxs), bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask);

            if (cliptrace.realfraction > trace.realfraction && hitnetworkentity)
                  *hitnetworkentity = 0;
            Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_clientedictfloat(touch, solid) == SOLID_BSP);
      }

finished:
#ifdef COLLISION_STUPID_TRACE_ENDPOS_IN_SOLID_WORKAROUND
      if(!VectorCompare(start, pEnd) && collision_endposnudge.value > 0)
            Collision_ShortenTrace(&cliptrace, len / (len + collision_endposnudge.value), pEnd);
#endif
      return cliptrace;
}

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