]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - world.c
World_EntitiesInBox now takes const mins/maxs
[xonotic/darkplaces.git] / world.c
diff --git a/world.c b/world.c
index 5f2e20fddf3f3c615d73695c8717a63de2dc6983..b178bad212bed4025cc0b2ffd4d02a02c7703a89 100644 (file)
--- a/world.c
+++ b/world.c
@@ -25,83 +25,38 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 entities never clip against themselves, or their owner
 
-line of sight checks trace->crosscontent, but bullets don't
+line of sight checks trace->inopen and trace->inwater, but bullets don't
 
 */
 
-cvar_t sv_useareanodes = {CVAR_NOTIFY, "sv_useareanodes", "1"};
-
-void SV_World_Init(void)
+void World_Init(void)
 {
-       Cvar_RegisterVariable(&sv_useareanodes);
+       Collision_Init();
 }
 
-
-void ClearLink (link_t *l);
-void RemoveLink (link_t *l);
-void InsertLinkBefore (link_t *l, link_t *before);
-void InsertLinkAfter (link_t *l, link_t *after);
-
-#define        EDICT_FROM_AREA(l) ((edict_t *)((qbyte *)l - (int)&(((edict_t *)0)->area)))
-
 //============================================================================
 
-// ClearLink is used for new headnodes
-void ClearLink (link_t *l)
+// World_ClearLink is used for new headnodes
+void World_ClearLink (link_t *l)
 {
+       l->entitynumber = 0;
        l->prev = l->next = l;
 }
 
-void RemoveLink (link_t *l)
+void World_RemoveLink (link_t *l)
 {
        l->next->prev = l->prev;
        l->prev->next = l->next;
 }
 
-void InsertLinkBefore (link_t *l, link_t *before)
+void World_InsertLinkBefore (link_t *l, link_t *before, int entitynumber)
 {
+       l->entitynumber = entitynumber;
        l->next = before;
        l->prev = before->prev;
        l->prev->next = l;
        l->next->prev = l;
 }
-void InsertLinkAfter (link_t *l, link_t *after)
-{
-       l->next = after->next;
-       l->prev = after;
-       l->prev->next = l;
-       l->next->prev = l;
-}
-
-
-typedef struct
-{
-       // bounding box of entire move area
-       vec3_t          boxmins, boxmaxs;
-
-       // size of the moving object
-       vec3_t          mins, maxs;
-
-       // size when clipping against monsters
-       vec3_t          mins2, maxs2;
-
-       // size when clipping against brush models
-       vec3_t          hullmins, hullmaxs;
-
-       // start and end origin of move
-       vec3_t          start, end;
-
-       // trace results
-       trace_t         trace;
-
-       // type of move (like ignoring monsters, or similar)
-       int                     type;
-
-       // the edict that is moving (if any)
-       edict_t         *passedict;
-}
-moveclip_t;
-
 
 /*
 ===============================================================================
@@ -111,536 +66,198 @@ ENTITY AREA CHECKING
 ===============================================================================
 */
 
-typedef struct areanode_s
-{
-       int             axis;           // -1 = leaf node
-       float   dist;
-       struct areanode_s       *children[2];
-       link_t  trigger_edicts;
-       link_t  solid_edicts;
-} areanode_t;
-
-#define        AREA_DEPTH      4
-#define        AREA_NODES      32
-
-static areanode_t      sv_areanodes[AREA_NODES];
-static int                     sv_numareanodes;
-
-/*
-===============
-SV_CreateAreaNode
-
-===============
-*/
-areanode_t *SV_CreateAreaNode (int depth, vec3_t mins, vec3_t maxs)
+void World_PrintAreaStats(world_t *world, const char *worldname)
 {
-       areanode_t      *anode;
-       vec3_t          size;
-       vec3_t          mins1, maxs1, mins2, maxs2;
-
-       anode = &sv_areanodes[sv_numareanodes];
-       sv_numareanodes++;
-
-       ClearLink (&anode->trigger_edicts);
-       ClearLink (&anode->solid_edicts);
-
-       if (depth == AREA_DEPTH)
-       {
-               anode->axis = -1;
-               anode->children[0] = anode->children[1] = NULL;
-               return anode;
-       }
-
-       VectorSubtract (maxs, mins, size);
-       if (size[0] > size[1])
-               anode->axis = 0;
-       else
-               anode->axis = 1;
-
-       anode->dist = 0.5 * (maxs[anode->axis] + mins[anode->axis]);
-       VectorCopy (mins, mins1);
-       VectorCopy (mins, mins2);
-       VectorCopy (maxs, maxs1);
-       VectorCopy (maxs, maxs2);
-
-       maxs1[anode->axis] = mins2[anode->axis] = anode->dist;
-
-       anode->children[0] = SV_CreateAreaNode (depth+1, mins2, maxs2);
-       anode->children[1] = SV_CreateAreaNode (depth+1, mins1, maxs1);
-
-       return anode;
+       Con_Printf("%s areagrid check stats: %d calls %d nodes (%f per call) %d entities (%f per call)\n", worldname, world->areagrid_stats_calls, world->areagrid_stats_nodechecks, (double) world->areagrid_stats_nodechecks / (double) world->areagrid_stats_calls, world->areagrid_stats_entitychecks, (double) world->areagrid_stats_entitychecks / (double) world->areagrid_stats_calls);
+       world->areagrid_stats_calls = 0;
+       world->areagrid_stats_nodechecks = 0;
+       world->areagrid_stats_entitychecks = 0;
 }
 
 /*
 ===============
-SV_ClearWorld
+World_Clear
 
 ===============
 */
-void SV_ClearWorld (void)
+void World_Clear(world_t *world)
 {
-       Collision_Init ();
-
-       memset (sv_areanodes, 0, sizeof(sv_areanodes));
-       sv_numareanodes = 0;
-       Mod_CheckLoaded(sv.worldmodel);
-       SV_CreateAreaNode (0, sv.worldmodel->normalmins, sv.worldmodel->normalmaxs);
+       int i;
+       // the areagrid_marknumber is not allowed to be 0
+       if (world->areagrid_marknumber < 1)
+               world->areagrid_marknumber = 1;
+       // choose either the world box size, or a larger box to ensure the grid isn't too fine
+       world->areagrid_size[0] = max(world->areagrid_maxs[0] - world->areagrid_mins[0], AREA_GRID * sv_areagrid_mingridsize.value);
+       world->areagrid_size[1] = max(world->areagrid_maxs[1] - world->areagrid_mins[1], AREA_GRID * sv_areagrid_mingridsize.value);
+       world->areagrid_size[2] = max(world->areagrid_maxs[2] - world->areagrid_mins[2], AREA_GRID * sv_areagrid_mingridsize.value);
+       // figure out the corners of such a box, centered at the center of the world box
+       world->areagrid_mins[0] = (world->areagrid_mins[0] + world->areagrid_maxs[0] - world->areagrid_size[0]) * 0.5f;
+       world->areagrid_mins[1] = (world->areagrid_mins[1] + world->areagrid_maxs[1] - world->areagrid_size[1]) * 0.5f;
+       world->areagrid_mins[2] = (world->areagrid_mins[2] + world->areagrid_maxs[2] - world->areagrid_size[2]) * 0.5f;
+       world->areagrid_maxs[0] = (world->areagrid_mins[0] + world->areagrid_maxs[0] + world->areagrid_size[0]) * 0.5f;
+       world->areagrid_maxs[1] = (world->areagrid_mins[1] + world->areagrid_maxs[1] + world->areagrid_size[1]) * 0.5f;
+       world->areagrid_maxs[2] = (world->areagrid_mins[2] + world->areagrid_maxs[2] + world->areagrid_size[2]) * 0.5f;
+       // now calculate the actual useful info from that
+       VectorNegate(world->areagrid_mins, world->areagrid_bias);
+       world->areagrid_scale[0] = AREA_GRID / world->areagrid_size[0];
+       world->areagrid_scale[1] = AREA_GRID / world->areagrid_size[1];
+       world->areagrid_scale[2] = AREA_GRID / world->areagrid_size[2];
+       World_ClearLink(&world->areagrid_outside);
+       for (i = 0;i < AREA_GRIDNODES;i++)
+               World_ClearLink(&world->areagrid[i]);
+       Con_DPrintf("areagrid settings: divisions %ix%ix1 : box %f %f %f : %f %f %f size %f %f %f grid %f %f %f (mingrid %f)\n", AREA_GRID, AREA_GRID, world->areagrid_mins[0], world->areagrid_mins[1], world->areagrid_mins[2], world->areagrid_maxs[0], world->areagrid_maxs[1], world->areagrid_maxs[2], world->areagrid_size[0], world->areagrid_size[1], world->areagrid_size[2], 1.0f / world->areagrid_scale[0], 1.0f / world->areagrid_scale[1], 1.0f / world->areagrid_scale[2], sv_areagrid_mingridsize.value);
 }
 
 
 /*
 ===============
-SV_UnlinkEdict
 
 ===============
 */
-void SV_UnlinkEdict (edict_t *ent)
-{
-       if (!ent->area.prev)
-               return;         // not linked in anywhere
-       RemoveLink (&ent->area);
-       ent->area.prev = ent->area.next = NULL;
-}
-
-
-/*
-====================
-SV_TouchLinks
-====================
-*/
-void SV_TouchLinks ( edict_t *ent, areanode_t *node )
+void World_UnlinkEdict(prvm_edict_t *ent)
 {
-       link_t          *l, *next;
-       edict_t         *touch;
-       int                     old_self, old_other;
-
-loc0:
-// touch linked edicts
-       for (l = node->trigger_edicts.next ; l != &node->trigger_edicts ; l = next)
-       {
-               next = l->next;
-               touch = EDICT_FROM_AREA(l);
-               if (touch == ent)
-                       continue;
-               if (!touch->v.touch || touch->v.solid != SOLID_TRIGGER)
-                       continue;
-               if (ent->v.absmin[0] > touch->v.absmax[0]
-                || ent->v.absmin[1] > touch->v.absmax[1]
-                || ent->v.absmin[2] > touch->v.absmax[2]
-                || ent->v.absmax[0] < touch->v.absmin[0]
-                || ent->v.absmax[1] < touch->v.absmin[1]
-                || ent->v.absmax[2] < touch->v.absmin[2])
-                       continue;
-               old_self = pr_global_struct->self;
-               old_other = pr_global_struct->other;
-
-               pr_global_struct->self = EDICT_TO_PROG(touch);
-               pr_global_struct->other = EDICT_TO_PROG(ent);
-               pr_global_struct->time = sv.time;
-               PR_ExecuteProgram (touch->v.touch, "");
-
-               pr_global_struct->self = old_self;
-               pr_global_struct->other = old_other;
-       }
-
-// recurse down both sides
-       if (node->axis == -1)
-               return;
-
-       if (ent->v.absmax[node->axis] > node->dist)
-       {
-               if (ent->v.absmin[node->axis] < node->dist)
-                       SV_TouchLinks(ent, node->children[1]); // order reversed to reduce code
-               node = node->children[0];
-               goto loc0;
-       }
-       else
+       int i;
+       for (i = 0;i < ENTITYGRIDAREAS;i++)
        {
-               if (ent->v.absmin[node->axis] < node->dist)
+               if (ent->priv.server->areagrid[i].prev)
                {
-                       node = node->children[1];
-                       goto loc0;
+                       World_RemoveLink (&ent->priv.server->areagrid[i]);
+                       ent->priv.server->areagrid[i].prev = ent->priv.server->areagrid[i].next = NULL;
                }
        }
 }
 
-
-/*
-===============
-SV_LinkEdict
-
-===============
-*/
-void SV_LinkEdict (edict_t *ent, qboolean touch_triggers)
+int World_EntitiesInBox(world_t *world, const vec3_t mins, const vec3_t maxs, int maxlist, prvm_edict_t **list)
 {
-       model_t         *model;
-       areanode_t      *node;
-
-       if (ent->area.prev)
-               SV_UnlinkEdict (ent);   // unlink from old position
-
-       if (ent == sv.edicts)
-               return;         // don't add the world
-
-       if (ent->free)
-               return;
-
-// set the abs box
-
-       if (ent->v.solid == SOLID_BSP)
+       int numlist;
+       link_t *grid;
+       link_t *l;
+       prvm_edict_t *ent;
+       int igrid[3], igridmins[3], igridmaxs[3];
+
+       // FIXME: if areagrid_marknumber wraps, all entities need their
+       // ent->priv.server->areagridmarknumber reset
+       world->areagrid_stats_calls++;
+       world->areagrid_marknumber++;
+       igridmins[0] = (int) floor((mins[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]);
+       igridmins[1] = (int) floor((mins[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]);
+       //igridmins[2] = (int) ((mins[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]);
+       igridmaxs[0] = (int) floor((maxs[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]) + 1;
+       igridmaxs[1] = (int) floor((maxs[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]) + 1;
+       //igridmaxs[2] = (int) ((maxs[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]) + 1;
+       igridmins[0] = max(0, igridmins[0]);
+       igridmins[1] = max(0, igridmins[1]);
+       //igridmins[2] = max(0, igridmins[2]);
+       igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
+       igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
+       //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
+
+       numlist = 0;
+       // add entities not linked into areagrid because they are too big or
+       // outside the grid bounds
+       if (world->areagrid_outside.next != &world->areagrid_outside)
        {
-               if (ent->v.modelindex < 0 || ent->v.modelindex > MAX_MODELS)
-                       PR_RunError("SOLID_BSP with invalid modelindex!\n");
-               model = sv.models[(int) ent->v.modelindex];
-               if (model != NULL)
+               grid = &world->areagrid_outside;
+               for (l = grid->next;l != grid;l = l->next)
                {
-                       if (model->type != mod_brush)
-                               PR_RunError("SOLID_BSP with non-BSP model\n");
-
-                       if (ent->v.angles[0] || ent->v.angles[2] || ent->v.avelocity[0] || ent->v.avelocity[2])
+                       ent = PRVM_EDICT_NUM(l->entitynumber);
+                       if (ent->priv.server->areagridmarknumber != world->areagrid_marknumber)
                        {
-                               VectorAdd(ent->v.origin, model->rotatedmins, ent->v.absmin);
-                               VectorAdd(ent->v.origin, model->rotatedmaxs, ent->v.absmax);
+                               ent->priv.server->areagridmarknumber = world->areagrid_marknumber;
+                               if (!ent->priv.server->free && BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs))
+                               {
+                                       if (numlist < maxlist)
+                                               list[numlist] = ent;
+                                       numlist++;
+                               }
+                               world->areagrid_stats_entitychecks++;
                        }
-                       else if (ent->v.angles[1] || ent->v.avelocity[1])
-                       {
-                               VectorAdd(ent->v.origin, model->yawmins, ent->v.absmin);
-                               VectorAdd(ent->v.origin, model->yawmaxs, ent->v.absmax);
-                       }
-                       else
-                       {
-                               VectorAdd(ent->v.origin, model->normalmins, ent->v.absmin);
-                               VectorAdd(ent->v.origin, model->normalmaxs, ent->v.absmax);
-                       }
-               }
-               else
-               {
-                       // SOLID_BSP with no model is valid, mainly because some QC setup code does so temporarily
-                       VectorAdd (ent->v.origin, ent->v.mins, ent->v.absmin);
-                       VectorAdd (ent->v.origin, ent->v.maxs, ent->v.absmax);
                }
        }
-       else
-       {
-               VectorAdd (ent->v.origin, ent->v.mins, ent->v.absmin);
-               VectorAdd (ent->v.origin, ent->v.maxs, ent->v.absmax);
-       }
-
-//
-// to make items easier to pick up and allow them to be grabbed off
-// of shelves, the abs sizes are expanded
-//
-       if ((int)ent->v.flags & FL_ITEM)
-       {
-               ent->v.absmin[0] -= 15;
-               ent->v.absmin[1] -= 15;
-               ent->v.absmin[2] -= 1;
-               ent->v.absmax[0] += 15;
-               ent->v.absmax[1] += 15;
-               ent->v.absmax[2] += 1;
-       }
-       else
-       {
-               // because movement is clipped an epsilon away from an actual edge,
-               // we must fully check even when bounding boxes don't quite touch
-               ent->v.absmin[0] -= 1;
-               ent->v.absmin[1] -= 1;
-               ent->v.absmin[2] -= 1;
-               ent->v.absmax[0] += 1;
-               ent->v.absmax[1] += 1;
-               ent->v.absmax[2] += 1;
-       }
-
-       if (ent->v.solid == SOLID_NOT)
-               return;
-
-// find the first node that the ent's box crosses
-       node = sv_areanodes;
-       while (1)
-       {
-               if (node->axis == -1)
-                       break;
-               if (ent->v.absmin[node->axis] > node->dist)
-                       node = node->children[0];
-               else if (ent->v.absmax[node->axis] < node->dist)
-                       node = node->children[1];
-               else
-                       break;          // crosses the node
-       }
-
-// link it in
-
-       if (ent->v.solid == SOLID_TRIGGER)
-               InsertLinkBefore (&ent->area, &node->trigger_edicts);
-       else
-               InsertLinkBefore (&ent->area, &node->solid_edicts);
-
-// if touch_triggers, touch all entities at this node and descend for more
-       if (touch_triggers)
-               SV_TouchLinks ( ent, sv_areanodes );
-}
-
-
-
-/*
-===============================================================================
-
-POINT TESTING IN HULLS
-
-===============================================================================
-*/
-
-/*
-============
-SV_TestEntityPosition
-
-This could be a lot more efficient...
-============
-*/
-int SV_TestEntityPosition (edict_t *ent)
-{
-       return SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, ent->v.origin, MOVE_NORMAL, ent).startsolid;
-}
-
-
-/*
-===============================================================================
-
-LINE TESTING IN HULLS
-
-===============================================================================
-*/
-
-/*
-==================
-SV_ClipMoveToEntity
-
-Handles selection or creation of a clipping hull, and offseting (and
-eventually rotation) of the end points
-==================
-*/
-trace_t SV_ClipMoveToEntity (edict_t *ent, vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end)
-{
-       int i;
-       trace_t trace;
-       model_t *model;
-
-       i = ent->v.modelindex;
-       if ((unsigned int) i >= MAX_MODELS)
-               PR_RunError("SV_ClipMoveToEntity: invalid modelindex\n");
-       model = sv.models[i];
-       if (i != 0 && model == NULL)
-               PR_RunError("SV_ClipMoveToEntity: invalid modelindex\n");
-
-       if ((int) ent->v.solid == SOLID_BSP)
+       // add grid linked entities
+       for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
        {
-               Mod_CheckLoaded(model);
-               if (model->type != mod_brush)
+               grid = world->areagrid + igrid[1] * AREA_GRID + igridmins[0];
+               for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
                {
-                       Con_Printf ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model, entity dump:\n");
-                       ED_Print (ent);
-                       Host_Error ("SV_ClipMoveToEntity: SOLID_BSP with a non bsp model\n");
+                       if (grid->next != grid)
+                       {
+                               for (l = grid->next;l != grid;l = l->next)
+                               {
+                                       ent = PRVM_EDICT_NUM(l->entitynumber);
+                                       if (ent->priv.server->areagridmarknumber != world->areagrid_marknumber)
+                                       {
+                                               ent->priv.server->areagridmarknumber = world->areagrid_marknumber;
+                                               if (!ent->priv.server->free && BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs))
+                                               {
+                                                       if (numlist < maxlist)
+                                                               list[numlist] = ent;
+                                                       numlist++;
+                                               }
+                                               //Con_Printf("%d %f %f %f %f %f %f : %d : %f %f %f %f %f %f\n", BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs), ent->priv.server->areamins[0], ent->priv.server->areamins[1], ent->priv.server->areamins[2], ent->priv.server->areamaxs[0], ent->priv.server->areamaxs[1], ent->priv.server->areamaxs[2], PRVM_NUM_FOR_EDICT(ent), mins[0], mins[1], mins[2], maxs[0], maxs[1], maxs[2]);
+                                       }
+                                       world->areagrid_stats_entitychecks++;
+                               }
+                       }
                }
-               if (ent->v.movetype != MOVETYPE_PUSH)
-                       Host_Error ("SV_ClipMoveToEntity: SOLID_BSP without MOVETYPE_PUSH");
        }
-
-       Collision_ClipTrace(&trace, ent, model, ent->v.origin, ent->v.angles, ent->v.mins, ent->v.maxs, start, mins, maxs, end);
-
-       return trace;
+       return numlist;
 }
 
-//===========================================================================
-
-/*
-====================
-SV_ClipToLinks
-
-Mins and maxs enclose the entire area swept by the move
-====================
-*/
-void SV_ClipToLinks ( areanode_t *node, moveclip_t *clip )
+void World_LinkEdict_AreaGrid(world_t *world, prvm_edict_t *ent)
 {
-       link_t          *l, *next;
-       edict_t         *touch;
-       trace_t         trace;
+       link_t *grid;
+       int igrid[3], igridmins[3], igridmaxs[3], gridnum, entitynumber = PRVM_NUM_FOR_EDICT(ent);
 
-loc0:
-       if (clip->trace.allsolid)
-               return;
-// touch linked edicts
-       for (l = node->solid_edicts.next ; l != &node->solid_edicts ; l = next)
+       if (entitynumber <= 0 || entitynumber >= prog->max_edicts || PRVM_EDICT_NUM(entitynumber) != ent)
        {
-               next = l->next;
-               touch = EDICT_FROM_AREA(l);
-               if (touch->v.solid == SOLID_NOT)
-                       continue;
-               if (touch == clip->passedict)
-                       continue;
-               if (touch->v.solid == SOLID_TRIGGER)
-                       Host_Error ("Trigger in clipping list");
-
-               if (clip->type == MOVE_NOMONSTERS && touch->v.solid != SOLID_BSP)
-                       continue;
-
-               if (clip->boxmins[0] > touch->v.absmax[0]
-                || clip->boxmaxs[0] < touch->v.absmin[0]
-                || clip->boxmins[1] > touch->v.absmax[1]
-                || clip->boxmaxs[1] < touch->v.absmin[1]
-                || clip->boxmins[2] > touch->v.absmax[2]
-                || clip->boxmaxs[2] < touch->v.absmin[2])
-                       continue;
-
-               if (clip->passedict)
-               {
-                       if (clip->passedict->v.size[0] && !touch->v.size[0])
-                               continue;       // points never interact
-                       if (PROG_TO_EDICT(touch->v.owner) == clip->passedict)
-                               continue;       // don't clip against own missiles
-                       if (PROG_TO_EDICT(clip->passedict->v.owner) == touch)
-                               continue;       // don't clip against owner
-                       // LordHavoc: corpse code
-                       if (clip->passedict->v.solid == SOLID_CORPSE && (touch->v.solid == SOLID_SLIDEBOX || touch->v.solid == SOLID_CORPSE))
-                               continue;
-                       if (clip->passedict->v.solid == SOLID_SLIDEBOX && touch->v.solid == SOLID_CORPSE)
-                               continue;
-               }
-
-               // might interact, so do an exact clip
-               if (touch->v.solid == SOLID_BSP)
-                       trace = SV_ClipMoveToEntity (touch, clip->start, clip->hullmins, clip->hullmaxs, clip->end);
-               else if ((int)touch->v.flags & FL_MONSTER)
-                       trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins2, clip->maxs2, clip->end);
-               else
-                       trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins, clip->maxs, clip->end);
-               // LordHavoc: take the 'best' answers from the new trace and combine with existing data
-               if (trace.allsolid)
-                       clip->trace.allsolid = true;
-               if (trace.startsolid)
-               {
-                       clip->trace.startsolid = true;
-                       if (!clip->trace.ent)
-                               clip->trace.ent = trace.ent;
-               }
-               if (trace.inopen)
-                       clip->trace.inopen = true;
-               if (trace.inwater)
-                       clip->trace.inwater = true;
-               if (trace.fraction < clip->trace.fraction)
-               {
-                       clip->trace.fraction = trace.fraction;
-                       VectorCopy(trace.endpos, clip->trace.endpos);
-                       clip->trace.plane = trace.plane;
-                       clip->trace.endcontents = trace.endcontents;
-                       clip->trace.ent = trace.ent;
-               }
-       }
-
-// recurse down both sides
-       if (node->axis == -1)
+               Con_Printf ("SV_LinkEdict_AreaGrid: invalid edict %p (edicts is %p, edict compared to prog->edicts is %i)\n", ent, prog->edicts, entitynumber);
                return;
-
-       if (clip->boxmaxs[node->axis] > node->dist)
-       {
-               if (clip->boxmins[node->axis] < node->dist)
-                       SV_ClipToLinks(node->children[1], clip);
-               node = node->children[0];
-               goto loc0;
-       }
-       else if (clip->boxmins[node->axis] < node->dist)
-       {
-               node = node->children[1];
-               goto loc0;
        }
-}
-
 
-/*
-==================
-SV_MoveBounds
-==================
-*/
-void SV_MoveBounds (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, vec3_t boxmins, vec3_t boxmaxs)
-{
-       if (sv_useareanodes.integer)
+       igridmins[0] = (int) floor((ent->priv.server->areamins[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]);
+       igridmins[1] = (int) floor((ent->priv.server->areamins[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]);
+       //igridmins[2] = (int) floor((ent->priv.server->areamins[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]);
+       igridmaxs[0] = (int) floor((ent->priv.server->areamaxs[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]) + 1;
+       igridmaxs[1] = (int) floor((ent->priv.server->areamaxs[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]) + 1;
+       //igridmaxs[2] = (int) floor((ent->priv.server->areamaxs[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]) + 1;
+       if (igridmins[0] < 0 || igridmaxs[0] > AREA_GRID || igridmins[1] < 0 || igridmaxs[1] > AREA_GRID || ((igridmaxs[0] - igridmins[0]) * (igridmaxs[1] - igridmins[1])) > ENTITYGRIDAREAS)
        {
-               int i;
-
-               for (i=0 ; i<3 ; i++)
-               {
-                       if (end[i] > start[i])
-                       {
-                               boxmins[i] = start[i] + mins[i] - 1;
-                               boxmaxs[i] = end[i] + maxs[i] + 1;
-                       }
-                       else
-                       {
-                               boxmins[i] = end[i] + mins[i] - 1;
-                               boxmaxs[i] = start[i] + maxs[i] + 1;
-                       }
-               }
+               // wow, something outside the grid, store it as such
+               World_InsertLinkBefore (&ent->priv.server->areagrid[0], &world->areagrid_outside, entitynumber);
+               return;
        }
-       else
+
+       gridnum = 0;
+       for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
        {
-               // debug to test against everything
-               boxmins[0] = boxmins[1] = boxmins[2] = -999999999;
-               boxmaxs[0] = boxmaxs[1] = boxmaxs[2] =  999999999;
+               grid = world->areagrid + igrid[1] * AREA_GRID + igridmins[0];
+               for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++, gridnum++)
+                       World_InsertLinkBefore (&ent->priv.server->areagrid[gridnum], grid, entitynumber);
        }
 }
 
 /*
-==================
-SV_Move
-==================
+===============
+World_LinkEdict
+
+===============
 */
-trace_t SV_Move (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, int type, edict_t *passedict)
+void World_LinkEdict(world_t *world, prvm_edict_t *ent, const vec3_t mins, const vec3_t maxs)
 {
-       moveclip_t      clip;
-       vec3_t          bigmins, bigmaxs;
-       int                     i;
-
-       memset ( &clip, 0, sizeof ( moveclip_t ) );
-
-       VectorCopy(start, clip.start);
-       VectorCopy(end, clip.end);
-       VectorCopy(mins, clip.mins);
-       VectorCopy(maxs, clip.maxs);
-       clip.type = type;
-       clip.passedict = passedict;
-
-       Collision_RoundUpToHullSize(sv.worldmodel, clip.mins, clip.maxs, clip.hullmins, clip.hullmaxs);
-
-       if (type == MOVE_MISSILE)
-       {
-               // LordHavoc: modified this, was = -15, now = clip.mins[i] - 15
-               for (i=0 ; i<3 ; i++)
-               {
-                       clip.mins2[i] = clip.mins[i] - 15;
-                       clip.maxs2[i] = clip.maxs[i] + 15;
-               }
-       }
-       else
-       {
-               VectorCopy (clip.mins, clip.mins2);
-               VectorCopy (clip.maxs, clip.maxs2);
-       }
+       // unlink from old position first
+       if (ent->priv.server->areagrid[0].prev)
+               World_UnlinkEdict(ent);
 
-       bigmins[0] = min(clip.mins2[0], clip.hullmins[0]);
-       bigmaxs[0] = max(clip.maxs2[0], clip.hullmaxs[0]);
-       bigmins[1] = min(clip.mins2[1], clip.hullmins[1]);
-       bigmaxs[1] = max(clip.maxs2[1], clip.hullmaxs[1]);
-       bigmins[2] = min(clip.mins2[2], clip.hullmins[2]);
-       bigmaxs[2] = max(clip.maxs2[2], clip.hullmaxs[2]);
-
-       // clip to world
-       clip.trace = SV_ClipMoveToEntity (sv.edicts, start, mins, maxs, end);
-
-       // clip to entities
-       // create the bounding box of the entire move
-       SV_MoveBounds ( start, bigmins, bigmaxs, end, clip.boxmins, clip.boxmaxs );
+       // don't add the world
+       if (ent == prog->edicts)
+               return;
 
-       SV_ClipToLinks ( sv_areanodes, &clip );
+       // don't add free entities
+       if (ent->priv.server->free)
+               return;
 
-       return clip.trace;
+       VectorCopy(mins, ent->priv.server->areamins);
+       VectorCopy(maxs, ent->priv.server->areamaxs);
+       World_LinkEdict_AreaGrid(world, ent);
 }
-