18 files changed, 284 insertions, 469 deletions

diff --git a/src/framework/GameSystem/NGrid.h b/src/framework/GameSystem/NGrid.h
index de3f4ccf56d..3810286e123 100644
--- a/src/framework/GameSystem/NGrid.h
+++ b/src/framework/GameSystem/NGrid.h
@@ -27,14 +27,19 @@
 #include "GameSystem/Grid.h"
 #include "GameSystem/GridReference.h"
 #include "Timer.h"
+#include "Util.h"
+
+#define DEFAULT_VISIBILITY_NOTIFY_PERIOD      1000
 
 class GridInfo
 {
 public:
     GridInfo()
-        : i_timer(0), i_unloadActiveLockCount(0), i_unloadExplicitLock(false), i_unloadReferenceLock(false) {}
+        : i_timer(0), i_unloadActiveLockCount(0), i_unloadExplicitLock(false), i_unloadReferenceLock(false),
+          vis_Update(0, irand(0,DEFAULT_VISIBILITY_NOTIFY_PERIOD)) {}
     GridInfo(time_t expiry, bool unload = true )
-        : i_timer(expiry), i_unloadActiveLockCount(0), i_unloadExplicitLock(!unload), i_unloadReferenceLock(false) {}
+        : i_timer(expiry), i_unloadActiveLockCount(0), i_unloadExplicitLock(!unload), i_unloadReferenceLock(false),
+          vis_Update(0, irand(0,DEFAULT_VISIBILITY_NOTIFY_PERIOD)) {}
     const TimeTracker& getTimeTracker() const { return i_timer; }
     bool getUnloadLock() const { return i_unloadActiveLockCount || i_unloadExplicitLock || i_unloadReferenceLock; }
     void setUnloadExplicitLock( bool on ) { i_unloadExplicitLock = on; }
@@ -45,9 +50,11 @@ public:
     void setTimer(const TimeTracker& pTimer) { i_timer = pTimer; }
     void ResetTimeTracker(time_t interval) { i_timer.Reset(interval); }
     void UpdateTimeTracker(time_t diff) { i_timer.Update(diff); }
-
+    PeriodicTimer& getRelocationTimer() { return vis_Update; }
 private:
     TimeTracker i_timer;
+    PeriodicTimer vis_Update;
+
     uint16 i_unloadActiveLockCount : 16;                    // lock from active object spawn points (prevent clone loading)
     bool   i_unloadExplicitLock    : 1;                     // explicit manual lock or config setting
     bool   i_unloadReferenceLock   : 1;                     // lock from instance map copy
diff --git a/src/game/Creature.cpp b/src/game/Creature.cpp
index 3e834f4aca0..8f24f923b1e 100644
--- a/src/game/Creature.cpp
+++ b/src/game/Creature.cpp
@@ -1588,7 +1588,7 @@ void Creature::Respawn(bool force)
             poolhandler.UpdatePool<Creature>(poolid, GetDBTableGUIDLow());
     }
 
-    SetToNotify();
+    UpdateObjectVisibility();
 }
 
 void Creature::ForcedDespawn(uint32 timeMSToDespawn)
diff --git a/src/game/GridNotifiers.cpp b/src/game/GridNotifiers.cpp
index 99f7e1241b6..91b70467a93 100644
--- a/src/game/GridNotifiers.cpp
+++ b/src/game/GridNotifiers.cpp
@@ -30,51 +30,8 @@
 using namespace Trinity;
 
 void
-Player2PlayerNotifier::Visit(PlayerMapType &m)
-{
-    for(PlayerMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
-    {
-        Player* plr = iter->getSource();
-        if(plr == &i_player)
-            continue;
-
-        vis_guids.erase(plr->GetGUID());
-        i_player.UpdateVisibilityOf(plr,i_data,i_visibleNow);
-
-        // force == true - update i_player visibility for all player in cell, ignore optimization flags.
-        if(!force && (plr->NotifyExecuted(NOTIFY_PLAYER_VISIBILITY) || plr->isNeedNotify(NOTIFY_PLAYER_VISIBILITY)))
-            continue;
-
-        plr->UpdateVisibilityOf(&i_player);
-    }
-}
-
-void
 VisibleNotifier::SendToSelf()
 {
-    for(Player::ClientGUIDs::const_iterator it = vis_guids.begin();it != vis_guids.end();++it)
-    {   //player guids processed in Player2PlayerNotifier
-        if(IS_PLAYER_GUID(*it))
-            continue;
-
-        i_player.m_clientGUIDs.erase(*it);
-        i_data.AddOutOfRangeGUID(*it);
-    }
-
-    if(!i_data.HasData())
-        return;
-
-    WorldPacket packet;
-    i_data.BuildPacket(&packet);
-    i_player.GetSession()->SendPacket(&packet);
-
-    for(std::set<Unit*>::const_iterator it = i_visibleNow.begin(); it != i_visibleNow.end(); ++it)
-        i_player.SendInitialVisiblePackets(*it);
-}
-
-void
-Player2PlayerNotifier::SendToSelf()
-{
     // at this moment i_clientGUIDs have guids that not iterate at grid level checks
     // but exist one case when this possible and object not out of range: transports
     if (Transport* transport = i_player.GetTransport())
@@ -86,22 +43,22 @@ Player2PlayerNotifier::SendToSelf()
 
                 i_player.UpdateVisibilityOf((*itr), i_data, i_visibleNow);
 
-                if(!(*itr)->isNeedNotify(NOTIFY_PLAYER_VISIBILITY))
+                if(!(*itr)->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
                     (*itr)->UpdateVisibilityOf(&i_player);
             }
         }
 
     for(Player::ClientGUIDs::const_iterator it = vis_guids.begin();it != vis_guids.end(); ++it)
     {
-        //since its player-player notifier we work only with player guids
-        if(!IS_PLAYER_GUID(*it))
-            continue;
-
         i_player.m_clientGUIDs.erase(*it);
         i_data.AddOutOfRangeGUID(*it);
-        Player* plr = ObjectAccessor::FindPlayer(*it);
-        if(plr && plr->IsInWorld() && !plr->NotifyExecuted(NOTIFY_PLAYER_VISIBILITY) && !plr->isNeedNotify(NOTIFY_PLAYER_VISIBILITY))
-            plr->UpdateVisibilityOf(&i_player);
+
+        if(IS_PLAYER_GUID(*it))
+        {
+            Player* plr = ObjectAccessor::FindPlayer(*it);
+            if(plr && plr->IsInWorld() && !plr->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+                plr->UpdateVisibilityOf(&i_player);
+        }
     }
 
     if(!i_data.HasData())
@@ -154,6 +111,135 @@ VisibleChangesNotifier::Visit(DynamicObjectMapType &m)
                     caster->UpdateVisibilityOf(&i_object);
 }
 
+inline void CreatureUnitRelocationWorker(Creature* c, Unit* u)
+{
+    if(!u->isAlive() || !c->isAlive() || u->isInFlight())
+        return;
+
+    if(c->HasReactState(REACT_AGGRESSIVE) && !c->hasUnitState(UNIT_STAT_SIGHTLESS))
+        if(c->_IsWithinDist(u, c->m_SightDistance, true) && c->IsAIEnabled)
+            c->AI()->MoveInLineOfSight(u);
+}
+
+void PlayerRelocationNotifier::Visit(PlayerMapType &m)
+{
+    for(PlayerMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
+    {
+        Player* plr = iter->getSource();
+
+        vis_guids.erase(plr->GetGUID());
+
+        i_player.UpdateVisibilityOf(plr,i_data,i_visibleNow);
+
+        if (plr->m_seer->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            continue;
+
+        plr->UpdateVisibilityOf(&i_player);
+    }
+}
+
+void PlayerRelocationNotifier::Visit(CreatureMapType &m)
+{
+    bool relocated_for_ai = (&i_player == i_player.m_seer);
+
+    for(CreatureMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
+    {
+        Creature * c = iter->getSource();
+
+        vis_guids.erase(c->GetGUID());
+
+        i_player.UpdateVisibilityOf(c,i_data,i_visibleNow);
+
+        if (relocated_for_ai && !c->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            CreatureUnitRelocationWorker(c, &i_player);
+    }
+}
+
+void CreatureRelocationNotifier::Visit(PlayerMapType &m)
+{
+    for(PlayerMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
+    {
+        Player * pl = iter->getSource();
+
+        if(!pl->m_seer->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            pl->UpdateVisibilityOf(&i_creature);
+
+        CreatureUnitRelocationWorker(&i_creature, pl);
+    }
+}
+
+void CreatureRelocationNotifier::Visit(CreatureMapType &m)
+{
+    if(!i_creature.isAlive())
+        return;
+
+    for(CreatureMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
+    {
+        Creature* c = iter->getSource();
+        CreatureUnitRelocationWorker(&i_creature, c);
+
+        if(!c->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            CreatureUnitRelocationWorker(c, &i_creature);
+    }
+}
+
+void DelayedUnitRelocation::Visit(CreatureMapType &m)
+{
+    for(CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
+    {
+        Creature * unit = iter->getSource();
+        if(!unit->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            continue;
+
+        CreatureRelocationNotifier relocate(*unit);
+
+        TypeContainerVisitor<CreatureRelocationNotifier, WorldTypeMapContainer > c2world_relocation(relocate);
+        TypeContainerVisitor<CreatureRelocationNotifier, GridTypeMapContainer >  c2grid_relocation(relocate);
+
+        cell.Visit(p, c2world_relocation, i_map, *unit, i_radius);
+        cell.Visit(p, c2grid_relocation, i_map, *unit, i_radius);
+    }
+}
+
+void DelayedUnitRelocation::Visit(PlayerMapType &m)
+{
+    for(PlayerMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
+    {
+        Player * player = iter->getSource();
+        WorldObject const *viewPoint = player->m_seer;
+
+        if(!viewPoint->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
+            continue;
+
+        if(player != viewPoint && !viewPoint->IsPositionValid())
+            continue;
+
+        CellPair pair2(Trinity::ComputeCellPair(viewPoint->GetPositionX(), viewPoint->GetPositionY()));
+        Cell cell2(pair2);
+        //cell.SetNoCreate(); need load cells around viewPoint or player, that's why its commented
+
+        PlayerRelocationNotifier relocate(*player);
+        TypeContainerVisitor<PlayerRelocationNotifier, WorldTypeMapContainer > c2world_relocation(relocate);
+        TypeContainerVisitor<PlayerRelocationNotifier, GridTypeMapContainer >  c2grid_relocation(relocate);
+
+        cell2.Visit(pair2, c2world_relocation, i_map, *viewPoint, i_radius);
+        cell2.Visit(pair2, c2grid_relocation, i_map, *viewPoint, i_radius);
+
+        relocate.SendToSelf();
+    }
+}
+
+void AIRelocationNotifier::Visit(CreatureMapType &m)
+{
+    for (CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
+    {
+        Creature *c = iter->getSource();
+        CreatureUnitRelocationWorker(c, &i_unit);
+        if(isCreature)
+            CreatureUnitRelocationWorker((Creature*)&i_unit, c);
+    }
+}
+
 void
 MessageDistDeliverer::Visit(PlayerMapType &m)
 {
diff --git a/src/game/GridNotifiers.h b/src/game/GridNotifiers.h
index 9031794a6ac..c6c4ee30a87 100644
--- a/src/game/GridNotifiers.h
+++ b/src/game/GridNotifiers.h
@@ -40,41 +40,34 @@ namespace Trinity
 {
     struct VisibleNotifier
     {
-        bool force;
         Player &i_player;
         UpdateData i_data;
         std::set<Unit*> i_visibleNow;
         Player::ClientGUIDs vis_guids;
 
-        explicit VisibleNotifier(Player &player, bool forced) :
-            i_player(player), vis_guids(player.m_clientGUIDs), force(forced) {}
-        explicit VisibleNotifier(Player &player) :
-            i_player(player), vis_guids(player.m_clientGUIDs),
-            force(player.isNeedNotify(NOTIFY_VISIBILITY_CHANGED)) {}
+        VisibleNotifier(Player &player) : i_player(player), vis_guids(player.m_clientGUIDs) {}
         template<class T> void Visit(GridRefManager<T> &m);
-        void Visit(CreatureMapType &m);
-        void Visit(PlayerMapType &m) {}
         void SendToSelf(void);
     };
 
-    struct Player2PlayerNotifier : public VisibleNotifier
+    struct VisibleChangesNotifier
     {
-        Player2PlayerNotifier(Player &player, bool forced = false) :
-            VisibleNotifier(player, forced) {}
+        WorldObject &i_object;
 
+        explicit VisibleChangesNotifier(WorldObject &object) : i_object(object) {}
         template<class T> void Visit(GridRefManager<T> &) {}
         void Visit(PlayerMapType &);
-        void SendToSelf(void);
+        void Visit(CreatureMapType &);
+        void Visit(DynamicObjectMapType &);
     };
 
-    struct PlayerRelocationNotifier
+    struct PlayerRelocationNotifier : public VisibleNotifier
     {
-        Player &i_player;
-        PlayerRelocationNotifier(Player &pl) : i_player(pl) {}
-        template<class T> void Visit(GridRefManager<T> &) {}
-        #ifdef WIN32
-        template<> inline void Visit(CreatureMapType &);
-        #endif
+        PlayerRelocationNotifier(Player &pl) : VisibleNotifier(pl) {}
+
+        template<class T> void Visit(GridRefManager<T> &m) { VisibleNotifier::Visit(m); }
+        void Visit(CreatureMapType &);
+        void Visit(PlayerMapType &);
     };
 
     struct CreatureRelocationNotifier
@@ -82,47 +75,31 @@ namespace Trinity
         Creature &i_creature;
         CreatureRelocationNotifier(Creature &c) : i_creature(c) {}
         template<class T> void Visit(GridRefManager<T> &) {}
-        #ifdef WIN32
-        template<> inline void Visit(PlayerMapType &);
-        template<> inline void Visit(CreatureMapType &);
-        #endif
-    };
-
-    struct VisibleChangesNotifier
-    {
-        WorldObject &i_object;
-
-        explicit VisibleChangesNotifier(WorldObject &object) : i_object(object) {}
-        template<class T> void Visit(GridRefManager<T> &) {}
-        void Visit(PlayerMapType &);
         void Visit(CreatureMapType &);
-        void Visit(DynamicObjectMapType &);
+        void Visit(PlayerMapType &);
     };
 
     struct DelayedUnitRelocation
     {
         Map &i_map;
-        const Cell& i_cell;
-        const CellPair& i_cellPair;
+        Cell &cell;
+        CellPair &p;
         const float i_radius;
-        DelayedUnitRelocation(const Cell& cell, const CellPair& cellp, Map &map, float radius) :
-        i_cell(cell), i_cellPair(cellp), i_map(map), i_radius(radius) {}
+        DelayedUnitRelocation(Cell &c, CellPair &pair, Map &map, float radius) :
+            cell(c), p(pair), i_map(map), i_radius(radius) {}
         template<class T> void Visit(GridRefManager<T> &) {}
-        void Visit(CreatureMapType &m) { Notify<Creature,CreatureRelocationNotifier >(m); }
-        void Visit(PlayerMapType   &m) { Notify<Player,PlayerRelocationNotifier >(m); }
-        template<class T, class VISITOR> 
-            void Notify(GridRefManager<T> &);
+        void Visit(CreatureMapType &);
+        void Visit(PlayerMapType   &);
     };
 
-    struct ResetNotifier
-    {
-        uint16 reset_mask;
-        ResetNotifier(uint16 notifies) : reset_mask(notifies) {}
-        template<class T> void Visit(GridRefManager<T> &m) { /*resetNotify(m);*/}
-        template<class T> void resetNotify(GridRefManager<T> &);
-        void Visit(CreatureMapType &m) { resetNotify<Creature>(m);}
-        void Visit(PlayerMapType &m) { resetNotify<Player>(m);}
-    };
+     struct AIRelocationNotifier
+     {
+        Unit &i_unit;
+        bool isCreature;
+        explicit AIRelocationNotifier(Unit &unit) : i_unit(unit), isCreature(unit.GetTypeId() == TYPEID_UNIT)  {}
+        template<class T> void Visit(GridRefManager<T> &) {}
+        void Visit(CreatureMapType &);
+     };
 
     struct GridUpdater
     {
@@ -1225,11 +1202,5 @@ namespace Trinity
             std::vector<WorldPacketList> i_data_cache;
                                                             // 0 = default, i => i-1 locale index
     };
-
-    #ifndef WIN32
-    template<> inline void PlayerRelocationNotifier::Visit<Creature>(CreatureMapType &);
-    template<> inline void CreatureRelocationNotifier::Visit<Player>(PlayerMapType &);
-    template<> inline void CreatureRelocationNotifier::Visit<Creature>(CreatureMapType &);
-    #endif
 }
 #endif
diff --git a/src/game/GridNotifiersImpl.h b/src/game/GridNotifiersImpl.h
index 01eae14141b..09a4d64adfc 100644
--- a/src/game/GridNotifiersImpl.h
+++ b/src/game/GridNotifiersImpl.h
@@ -37,21 +37,7 @@ Trinity::VisibleNotifier::Visit(GridRefManager<T> &m)
     for(typename GridRefManager<T>::iterator iter = m.begin(); iter != m.end(); ++iter)
     {
         vis_guids.erase(iter->getSource()->GetGUID());
-
-        if(force/* || iter->getSource()->isNeedNotify(NOTIFY_VISIBILITY_CHANGED)*/)
-            i_player.UpdateVisibilityOf(iter->getSource(),i_data,i_visibleNow);
-    }
-}
-
-inline void
-Trinity::VisibleNotifier::Visit(CreatureMapType &m)
-{
-    for(CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
-    {
-        vis_guids.erase(iter->getSource()->GetGUID());
-
-        if(force || iter->getSource()->isNeedNotify(NOTIFY_VISIBILITY_CHANGED))
-            i_player.UpdateVisibilityOf(iter->getSource(),i_data,i_visibleNow);
+        i_player.UpdateVisibilityOf(iter->getSource(),i_data,i_visibleNow);
     }
 }
 
@@ -63,102 +49,6 @@ Trinity::ObjectUpdater::Visit(CreatureMapType &m)
             iter->getSource()->Update(i_timeDiff);
 }
 
-inline void PlayerCreatureRelocationWorker(Player* pl, Creature* c)
-{
-    if(!pl->isAlive() || !c->isAlive() || pl->isInFlight())
-        return;
-
-    // Creature AI reaction
-    if(c->HasReactState(REACT_AGGRESSIVE) && !c->hasUnitState(UNIT_STAT_SIGHTLESS))
-        if(c->_IsWithinDist(pl, c->m_SightDistance, true) && c->IsAIEnabled)
-            c->AI()->MoveInLineOfSight(pl);
-}
-
-inline void CreatureCreatureRelocationWorker(Creature* c1, Creature* c2)
-{
-    if(c1->HasReactState(REACT_AGGRESSIVE) && !c1->hasUnitState(UNIT_STAT_SIGHTLESS))
-        if(c1->_IsWithinDist(c2, c1->m_SightDistance, true) && c1->IsAIEnabled)
-            c1->AI()->MoveInLineOfSight(c2);
-
-    if(c2->HasReactState(REACT_AGGRESSIVE) && !c2->hasUnitState(UNIT_STAT_SIGHTLESS))
-        if(c1->_IsWithinDist(c2, c2->m_SightDistance, true) && c2->IsAIEnabled)
-            c2->AI()->MoveInLineOfSight(c1);
-}
-
-template<class T, class VISITOR> 
-inline void
-Trinity::DelayedUnitRelocation::Notify(GridRefManager<T> &m)
-{
-    for(typename GridRefManager<T>::iterator iter = m.begin(); iter != m.end(); ++iter)
-    {
-        T * unit = iter->getSource();
-        if(!unit->isAlive() || !unit->isNeedNotify(NOTIFY_AI_RELOCATION))
-            continue;
-
-        VISITOR relocate(*unit);
-        TypeContainerVisitor<VISITOR, WorldTypeMapContainer > c2world_relocation(relocate);
-        TypeContainerVisitor<VISITOR, GridTypeMapContainer >  c2grid_relocation(relocate);
-
-        i_cell.Visit(i_cellPair, c2world_relocation, i_map, *unit, i_radius);
-        i_cell.Visit(i_cellPair, c2grid_relocation, i_map, *unit, i_radius);
-
-        unit->SetNotified(NOTIFY_AI_RELOCATION);
-    }
-}
-
-template<class T>
-inline void
-Trinity::ResetNotifier::resetNotify(GridRefManager<T> &m)
-{
-    for(typename GridRefManager<T>::iterator iter=m.begin(); iter != m.end(); ++iter)
-        iter->getSource()->ResetAllNotifiesbyMask(reset_mask);
-}
-
-template<>
-inline void
-Trinity::PlayerRelocationNotifier::Visit(CreatureMapType &m)
-{
-    if(!i_player.isAlive() || i_player.isInFlight())
-        return;
-
-    for (CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
-    {
-        Creature * c = iter->getSource();
-        if(c->isAlive() && !c->NotifyExecuted(NOTIFY_AI_RELOCATION))
-            PlayerCreatureRelocationWorker(&i_player, c);
-    }
-}
-
-template<>
-inline void
-Trinity::CreatureRelocationNotifier::Visit(PlayerMapType &m)
-{
-    if(!i_creature.isAlive())
-        return;
-
-    for(PlayerMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
-    {
-        Player * pl = iter->getSource();
-        if( pl->isAlive() && !pl->isInFlight() && !pl->NotifyExecuted(NOTIFY_AI_RELOCATION))
-            PlayerCreatureRelocationWorker(pl, &i_creature);
-    }
-}
-
-template<>
-inline void
-Trinity::CreatureRelocationNotifier::Visit(CreatureMapType &m)
-{
-    if(!i_creature.isAlive())
-        return;
-
-    for (CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
-    {
-        Creature* c = iter->getSource();
-        if( c != &i_creature && c->isAlive() && !c->NotifyExecuted(NOTIFY_AI_RELOCATION))
-            CreatureCreatureRelocationWorker(c, &i_creature);
-    }
-}
-
 // SEARCHERS & LIST SEARCHERS & WORKERS
 
 // WorldObject searchers & workers
diff --git a/src/game/Map.cpp b/src/game/Map.cpp
index dbfe03f5ee3..52cef896809 100644
--- a/src/game/Map.cpp
+++ b/src/game/Map.cpp
@@ -214,10 +214,8 @@ Map::Map(uint32 id, time_t expiry, uint32 InstanceId, uint8 SpawnMode, Map* _par
   m_activeNonPlayersIter(m_activeNonPlayers.end()),
   i_gridExpiry(expiry), m_parentMap(_parent ? _parent : this),
   m_VisibleDistance(DEFAULT_VISIBILITY_DISTANCE),
-  i_scriptLock(false),
-  m_PlayerVisibilityNotifyTimer(0.75*DEFAULT_VISIBILITY_NOTIFY_PERIOD, 0.25*DEFAULT_VISIBILITY_NOTIFY_PERIOD),
-  m_ObjectVisibilityNotifyTimer(DEFAULT_VISIBILITY_NOTIFY_PERIOD, 0 * DEFAULT_VISIBILITY_NOTIFY_PERIOD),
-  m_RelocationNotifyTimer(DEFAULT_VISIBILITY_NOTIFY_PERIOD,0.5*DEFAULT_VISIBILITY_NOTIFY_PERIOD)
+  m_VisibilityNotifyPeriod(DEFAULT_VISIBILITY_NOTIFY_PERIOD),
+  i_scriptLock(false)
 {
     for (unsigned int idx=0; idx < MAX_NUMBER_OF_GRIDS; ++idx)
     {
@@ -237,10 +235,7 @@ void Map::InitVisibilityDistance()
 {
     //init visibility for continents
     m_VisibleDistance = World::GetMaxVisibleDistanceOnContinents();
-
-    m_PlayerVisibilityNotifyTimer.SetPeriodic(0.75*sWorld.GetVisibilityNotifyPeriodOnContinents(), 0.25*sWorld.GetVisibilityNotifyPeriodOnContinents());
-    m_ObjectVisibilityNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodOnContinents(), 0 * sWorld.GetVisibilityNotifyPeriodOnContinents());
-    m_RelocationNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodOnContinents(),0.5*sWorld.GetVisibilityNotifyPeriodOnContinents());
+    m_VisibilityNotifyPeriod = World::GetVisibilityNotifyPeriodOnContinents();
 }
 
 // Template specialization of utility methods
@@ -333,23 +328,6 @@ void Map::DeleteFromWorld(Player* pl)
     delete pl;
 }
 
-template<class T>
-void Map::AddNotifier(T*)
-{
-}
-
-template<>
-void Map::AddNotifier(Player* obj)
-{
-    obj->AddToNotify(NOTIFY_VISIBILITY_CHANGED | NOTIFY_AI_RELOCATION | NOTIFY_PLAYER_VISIBILITY);
-}
-
-template<>
-void Map::AddNotifier(Creature* obj)
-{
-    obj->AddToNotify(NOTIFY_VISIBILITY_CHANGED | NOTIFY_AI_RELOCATION);
-}
-
 void
 Map::EnsureGridCreated(const GridPair &p)
 {
@@ -452,14 +430,13 @@ bool Map::Add(Player *player)
     assert( grid != NULL );
     AddToGrid(player, grid, cell);
 
-    player->ResetAllNotifies();
     player->AddToWorld();
 
     SendInitSelf(player);
     SendInitTransports(player);
 
     player->m_clientGUIDs.clear();
-    AddNotifier<Player>(player);
+    player->UpdateObjectVisibility(true);
 
     return true;
 }
@@ -478,8 +455,7 @@ Map::Add(T *obj)
     Cell cell(p);
     if(obj->IsInWorld()) // need some clean up later
     {
-        UpdateObjectVisibility(obj,cell,p); // is this needed?
-        AddNotifier(obj);
+        obj->UpdateObjectVisibility(true);
         return;
     }
 
@@ -502,9 +478,7 @@ Map::Add(T *obj)
 
     //something, such as vehicle, needs to be update immediately
     //also, trigger needs to cast spell, if not update, cannot see visual
-    //if(obj->GetTypeId() != TYPEID_UNIT)
-    UpdateObjectVisibility(obj,cell,p);
-    AddNotifier<T>(obj);
+    obj->UpdateObjectVisibility(true);
 }
 
 /*
@@ -729,109 +703,33 @@ void Map::Update(const uint32 &t_diff)
 
     MoveAllCreaturesInMoveList();
 
-    {
-        bool hasPlayers = !m_mapRefManager.isEmpty();
-        bool hasActiveObjects = !m_activeNonPlayers.empty();
-
-        if(hasPlayers)
-        {
-            if(m_PlayerVisibilityNotifyTimer.Update(t_diff))
-            {   // process player-player visibility
-                ProcesssPlayersVisibility();
-                ResetNotifies(NOTIFY_PLAYER_VISIBILITY);
-            }
-
-            if(m_ObjectVisibilityNotifyTimer.Update(t_diff))
-            {
-                ProcessObjectsVisibility();
-                ResetNotifies(NOTIFY_VISIBILITY_CHANGED);
-            }
-        }
-
-        if(hasActiveObjects || hasPlayers)
-            if(m_RelocationNotifyTimer.Update(t_diff))
-            {
-                ProcessRelocationNotifies();
-                ResetNotifies(NOTIFY_AI_RELOCATION);
-            }
-    }
-}
-
-void Map::ProcesssPlayersVisibility()
-{
-    for(m_mapRefIter = m_mapRefManager.begin(); m_mapRefIter != m_mapRefManager.end(); ++m_mapRefIter)
-    {
-        Player* player = m_mapRefIter->getSource();
-
-        if (player->m_seer != player && !player->GetVehicle())
-            AddNotifier<Player>(player);
-
-        if(!player->IsInWorld() || !player->isNeedNotify(NOTIFY_PLAYER_VISIBILITY))
-            continue;
-
-        WorldObject const *viewPoint = player->m_seer;
-        CellPair cellpair(Trinity::ComputeCellPair(viewPoint->GetPositionX(), viewPoint->GetPositionY()));
-
-        if (cellpair.x_coord >= TOTAL_NUMBER_OF_CELLS_PER_MAP || cellpair.y_coord >= TOTAL_NUMBER_OF_CELLS_PER_MAP)
-            continue;
-
-        Trinity::Player2PlayerNotifier notifier(*player);
-
-        Cell cell(cellpair);
-        cell.data.Part.reserved = ALL_DISTRICT;
-        //cell.SetNoCreate();
-        TypeContainerVisitor<Trinity::Player2PlayerNotifier, WorldTypeMapContainer > world_notifier(notifier);
-        cell.Visit(cellpair, world_notifier, *this, *viewPoint, GetVisibilityDistance());
-
-        // send data
-        notifier.SendToSelf();
-        player->RemoveFromNotify(NOTIFY_PLAYER_VISIBILITY);
-        player->SetNotified(NOTIFY_PLAYER_VISIBILITY);
-    }
+    if(!m_mapRefManager.isEmpty() || !m_activeNonPlayers.empty())
+        ProcessRelocationNotifies(t_diff);
 }
 
-void Map::ProcessObjectsVisibility()
+struct ResetNotifier
 {
-    for(m_mapRefIter = m_mapRefManager.begin(); m_mapRefIter != m_mapRefManager.end(); ++m_mapRefIter)
+    template<class T>inline void resetNotify(GridRefManager<T> &m)
     {
-        Player* player = m_mapRefIter->getSource();
-
-        if (player->m_seer != player && !player->GetVehicle())
-            AddNotifier<Player>(player);
-
-        if(!player->IsInWorld())
-            continue;
-
-        WorldObject const *viewPoint = player->m_seer;
-        CellPair cellpair(Trinity::ComputeCellPair(viewPoint->GetPositionX(), viewPoint->GetPositionY()));
-
-        if (cellpair.x_coord >= TOTAL_NUMBER_OF_CELLS_PER_MAP || cellpair.y_coord >= TOTAL_NUMBER_OF_CELLS_PER_MAP)
-            continue;
-
-        Cell cell(cellpair);
-        cell.data.Part.reserved = ALL_DISTRICT;
-        cell.SetNoCreate();
-
-        Trinity::VisibleNotifier notifier(*player);
-
-        TypeContainerVisitor<Trinity::VisibleNotifier, WorldTypeMapContainer > world_notifier(notifier);
-        TypeContainerVisitor<Trinity::VisibleNotifier, GridTypeMapContainer  > grid_notifier(notifier);
-        cell.Visit(cellpair, world_notifier, *this, *viewPoint, GetVisibilityDistance());
-        cell.Visit(cellpair, grid_notifier,  *this, *viewPoint, GetVisibilityDistance());
-
-        // send data
-        notifier.SendToSelf();
-        player->SetNotified(NOTIFY_VISIBILITY_CHANGED);
+        for(typename GridRefManager<T>::iterator iter=m.begin(); iter != m.end(); ++iter)
+            iter->getSource()->ResetAllNotifies();
     }
-}
+    template<class T> void Visit(GridRefManager<T> &) {}
+    void Visit(CreatureMapType &m) { resetNotify<Creature>(m);}
+    void Visit(PlayerMapType &m) { resetNotify<Player>(m);}
+};
 
-void Map::ProcessRelocationNotifies()
+void Map::ProcessRelocationNotifies(const uint32 & diff)
 {
     for(GridRefManager<NGridType>::iterator i = GridRefManager<NGridType>::begin(); i != GridRefManager<NGridType>::end(); ++i)
     {
         NGridType *grid = i->getSource();
 
-        if(!grid || grid->GetGridState() != GRID_STATE_ACTIVE)
+        if (grid->GetGridState() != GRID_STATE_ACTIVE)
+            continue;
+
+        grid->getGridInfoRef()->getRelocationTimer().TUpdate(diff);
+        if (!grid->getGridInfoRef()->getRelocationTimer().TPassed())
             continue;
 
         uint32 gx = grid->getX(), gy = grid->getY();
@@ -849,39 +747,32 @@ void Map::ProcessRelocationNotifies()
 
                 CellPair pair(x,y);
                 Cell cell(pair);
-                cell.data.Part.reserved = CENTER_DISTRICT;
                 cell.SetNoCreate();
 
                 Trinity::DelayedUnitRelocation cell_relocation(cell, pair, *this, GetVisibilityDistance());
                 TypeContainerVisitor<Trinity::DelayedUnitRelocation, GridTypeMapContainer  > grid_object_relocation(cell_relocation);
                 TypeContainerVisitor<Trinity::DelayedUnitRelocation, WorldTypeMapContainer > world_object_relocation(cell_relocation);
-                cell.Visit(pair, grid_object_relocation,  *this);
-                cell.Visit(pair, world_object_relocation,  *this);
+                Visit(cell, grid_object_relocation);
+                Visit(cell, world_object_relocation);
             }
         }
     }
-}
-
-void Map::ResetNotifies(uint16 notify_mask)
-{
-    if(notify_mask == NOTIFY_PLAYER_VISIBILITY)
-    {
-        for(m_mapRefIter = m_mapRefManager.begin(); m_mapRefIter != m_mapRefManager.end(); ++m_mapRefIter)
-            m_mapRefIter->getSource()->ResetAllNotifiesbyMask(notify_mask);
-        return;
-    }
-
-    Trinity::ResetNotifier reset(notify_mask);
-    TypeContainerVisitor<Trinity::ResetNotifier, GridTypeMapContainer >  grid_notifier(reset);
-    TypeContainerVisitor<Trinity::ResetNotifier, WorldTypeMapContainer > world_notifier(reset);
 
+    ResetNotifier reset;
+    TypeContainerVisitor<ResetNotifier, GridTypeMapContainer >  grid_notifier(reset);
+    TypeContainerVisitor<ResetNotifier, WorldTypeMapContainer > world_notifier(reset);
     for(GridRefManager<NGridType>::iterator i = GridRefManager<NGridType>::begin(); i != GridRefManager<NGridType>::end(); ++i)
     {
         NGridType *grid = i->getSource();
 
-        if(!grid || grid->GetGridState() != GRID_STATE_ACTIVE)
+        if (grid->GetGridState() != GRID_STATE_ACTIVE)
+            continue;
+
+        if (!grid->getGridInfoRef()->getRelocationTimer().TPassed())
             continue;
 
+        grid->getGridInfoRef()->getRelocationTimer().TReset(diff, m_VisibilityNotifyPeriod);
+
         uint32 gx = grid->getX(), gy = grid->getY();
 
         CellPair cell_min(gx*MAX_NUMBER_OF_CELLS, gy*MAX_NUMBER_OF_CELLS);
@@ -897,10 +788,9 @@ void Map::ResetNotifies(uint16 notify_mask)
 
                 CellPair pair(x,y);
                 Cell cell(pair);
-                cell.data.Part.reserved = CENTER_DISTRICT;
                 cell.SetNoCreate();
-                cell.Visit(pair, grid_notifier,  *this);
-                cell.Visit(pair, world_notifier,  *this);
+                Visit(cell, grid_notifier);
+                Visit(cell, world_notifier);
             }
         }
     }
@@ -908,7 +798,6 @@ void Map::ResetNotifies(uint16 notify_mask)
 
 void Map::Remove(Player *player, bool remove)
 {
-    player->ResetAllNotifies();
     player->RemoveFromWorld();
     SendRemoveTransports(player);
 
@@ -926,8 +815,8 @@ void Map::Remove(Player *player, bool remove)
             NGridType *grid = getNGrid(cell.GridX(), cell.GridY());
             assert(grid != NULL);
 
+            player->UpdateObjectVisibility(true);
             RemoveFromGrid(player,grid,cell);
-            UpdateObjectVisibility(player,cell,p);
         }
     }
 
@@ -952,7 +841,6 @@ template<class T>
 void
 Map::Remove(T *obj, bool remove)
 {
-    obj->ResetAllNotifies();
     obj->RemoveFromWorld();
     if (obj->isActiveObject())
         RemoveFromActive(obj);
@@ -969,8 +857,8 @@ Map::Remove(T *obj, bool remove)
             NGridType *grid = getNGrid(cell.GridX(), cell.GridY());
             assert(grid != NULL);
 
+            obj->UpdateObjectVisibility(true);
             RemoveFromGrid(obj,grid,cell);
-            UpdateObjectVisibility(obj,cell,p);
         }
     }
 
@@ -1012,7 +900,7 @@ Map::PlayerRelocation(Player *player, float x, float y, float z, float orientati
         AddToGrid(player, newGrid,new_cell);
     }
 
-    AddNotifier<Player>(player);
+    player->UpdateObjectVisibility(false);
 }
 
 void
@@ -1038,7 +926,7 @@ Map::CreatureRelocation(Creature *creature, float x, float y, float z, float ang
     else
     {
         creature->Relocate(x, y, z, ang);
-        AddNotifier<Creature>(creature);
+        creature->UpdateObjectVisibility(false);
     }
 
     assert(CheckGridIntegrity(creature,true));
@@ -1072,7 +960,7 @@ void Map::MoveAllCreaturesInMoveList()
             // update pos
             c->Relocate(cm.x, cm.y, cm.z, cm.ang);
             //CreatureRelocationNotify(c,new_cell,new_cell.cellPair());
-            AddNotifier<Creature>(c);
+            c->UpdateObjectVisibility(false);
         }
         else
         {
@@ -1179,7 +1067,7 @@ bool Map::CreatureRespawnRelocation(Creature *c)
         c->Relocate(resp_x, resp_y, resp_z, resp_o);
         c->GetMotionMaster()->Initialize();                 // prevent possible problems with default move generators
         //CreatureRelocationNotify(c,resp_cell,resp_cell.cellPair());
-        AddNotifier<Creature>(c);
+        c->UpdateObjectVisibility(false);
         return true;
     }
     else
@@ -2176,21 +2064,9 @@ void Map::UpdateObjectVisibility( WorldObject* obj, Cell cell, CellPair cellpair
     cell.Visit(cellpair, player_notifier, *this, *obj, GetVisibilityDistance());
 }
 
-
-void Map::UpdatePlayerVisibility( Player* player, Cell cell, CellPair cellpair )
-{
-    cell.data.Part.reserved = ALL_DISTRICT;
-
-    Trinity::Player2PlayerNotifier pl_notifier(*player);
-    TypeContainerVisitor<Trinity::Player2PlayerNotifier, WorldTypeMapContainer > player_notifier(pl_notifier);
-
-    cell.Visit(cellpair, player_notifier, *this, *player, GetVisibilityDistance());
-    pl_notifier.SendToSelf();
-}
-
 void Map::UpdateObjectsVisibilityFor( Player* player, Cell cell, CellPair cellpair )
 {
-    Trinity::VisibleNotifier notifier(*player, true);
+    Trinity::VisibleNotifier notifier(*player);
 
     cell.data.Part.reserved = ALL_DISTRICT;
     cell.SetNoCreate();
@@ -2556,10 +2432,7 @@ void InstanceMap::InitVisibilityDistance()
 {
     //init visibility distance for instances
     m_VisibleDistance = World::GetMaxVisibleDistanceInInstances();
-
-    m_PlayerVisibilityNotifyTimer.SetPeriodic(0.75*sWorld.GetVisibilityNotifyPeriodInInstances(), 0.25*sWorld.GetVisibilityNotifyPeriodInInstances());
-    m_ObjectVisibilityNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodInInstances(), 0 * sWorld.GetVisibilityNotifyPeriodInInstances());
-    m_RelocationNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodInInstances(),0.5*sWorld.GetVisibilityNotifyPeriodInInstances());
+    m_VisibilityNotifyPeriod = World::GetVisibilityNotifyPeriodInInstances();
 }
 
 /*
@@ -2911,10 +2784,7 @@ void BattleGroundMap::InitVisibilityDistance()
 {
     //init visibility distance for BG/Arenas
     m_VisibleDistance = World::GetMaxVisibleDistanceInBGArenas();
-
-    m_PlayerVisibilityNotifyTimer.SetPeriodic(0.75*sWorld.GetVisibilityNotifyPeriodInBGArenas(), 0.25*sWorld.GetVisibilityNotifyPeriodInBGArenas());
-    m_ObjectVisibilityNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodInBGArenas(), 0 * sWorld.GetVisibilityNotifyPeriodInBGArenas());
-    m_RelocationNotifyTimer.SetPeriodic(sWorld.GetVisibilityNotifyPeriodInBGArenas(),0.5*sWorld.GetVisibilityNotifyPeriodInBGArenas());
+    m_VisibilityNotifyPeriod = World::GetVisibilityNotifyPeriodInBGArenas();
 }
 
 bool BattleGroundMap::CanEnter(Player * player)
diff --git a/src/game/Map.h b/src/game/Map.h
index 8bef03bf8ea..292431eeecb 100644
--- a/src/game/Map.h
+++ b/src/game/Map.h
@@ -379,7 +379,6 @@ class Map : public GridRefManager<NGridType>, public Trinity::ObjectLevelLockabl
         virtual bool RemoveBones(uint64 guid, float x, float y);
 
         void UpdateObjectVisibility(WorldObject* obj, Cell cell, CellPair cellpair);
-        void UpdatePlayerVisibility( Player* player, Cell cell, CellPair cellpair );
         void UpdateObjectsVisibilityFor(Player* player, Cell cell, CellPair cellpair );
 
         void resetMarkedCells() { marked_cells.reset(); }
@@ -491,9 +490,7 @@ class Map : public GridRefManager<NGridType>, public Trinity::ObjectLevelLockabl
         MapRefManager m_mapRefManager;
         MapRefManager::iterator m_mapRefIter;
 
-        PeriodicTimer m_ObjectVisibilityNotifyTimer;
-        PeriodicTimer m_PlayerVisibilityNotifyTimer;
-        PeriodicTimer m_RelocationNotifyTimer;
+        int32 m_VisibilityNotifyPeriod;
 
         typedef std::set<WorldObject*> ActiveNonPlayers;
         ActiveNonPlayers m_activeNonPlayers;
@@ -510,10 +507,9 @@ class Map : public GridRefManager<NGridType>, public Trinity::ObjectLevelLockabl
         GridMap *GridMaps[MAX_NUMBER_OF_GRIDS][MAX_NUMBER_OF_GRIDS];
         std::bitset<TOTAL_NUMBER_OF_CELLS_PER_MAP*TOTAL_NUMBER_OF_CELLS_PER_MAP> marked_cells;
 
-        void ProcessObjectsVisibility();
-        void ProcesssPlayersVisibility();
-        void ProcessRelocationNotifies();
-        void ResetNotifies(uint16 notify_mask);
+        //these functions used to process player/mob aggro reactions and
+        //visibility calculations. Highly optimized for massive calculations
+        void ProcessRelocationNotifies(const uint32 &diff);
 
         bool i_scriptLock;
         std::set<WorldObject *> i_objectsToRemove;
@@ -526,9 +522,6 @@ class Map : public GridRefManager<NGridType>, public Trinity::ObjectLevelLockabl
             void AddToGrid(T*, NGridType *, Cell const&);
 
         template<class T>
-            void AddNotifier(T*);
-
-        template<class T>
             void RemoveFromGrid(T*, NGridType *, Cell const&);
 
         template<class T>
diff --git a/src/game/MapManager.h b/src/game/MapManager.h
index 60e2255f8af..3f01c7e2f34 100644
--- a/src/game/MapManager.h
+++ b/src/game/MapManager.h
@@ -31,8 +31,6 @@
 
 class Transport;
 
-#define DEFAULT_VISIBILITY_NOTIFY_PERIOD      1100
-
 class MapManager : public Trinity::Singleton<MapManager, Trinity::ClassLevelLockable<MapManager, ACE_Thread_Mutex> >
 {
 
diff --git a/src/game/MiscHandler.cpp b/src/game/MiscHandler.cpp
index 52853c57fd3..cf9515c3db9 100644
--- a/src/game/MiscHandler.cpp
+++ b/src/game/MiscHandler.cpp
@@ -1416,10 +1416,8 @@ void WorldSession::HandleFarSightOpcode( WorldPacket & recv_data )
             sLog.outDebug("Unhandled mode in CMSG_FAR_SIGHT: %u", apply);
             return;
     }
-    // Update visibility after vision change
-    //Cell cell(pair);
-    //GetPlayer()->GetMap()->UpdateObjectsVisibilityFor(_player, cell, pair);
-    GetPlayer()->SetToNotify();
+
+    GetPlayer()->UpdateVisibilityForPlayer();
 }
 
 void WorldSession::HandleSetTitleOpcode( WorldPacket & recv_data )
diff --git a/src/game/NPCHandler.cpp b/src/game/NPCHandler.cpp
index fc2c590745a..dad51d76586 100644
--- a/src/game/NPCHandler.cpp
+++ b/src/game/NPCHandler.cpp
@@ -425,13 +425,11 @@ void WorldSession::SendSpiritResurrect()
             _player->TeleportTo(corpseGrave->map_id, corpseGrave->x, corpseGrave->y, corpseGrave->z, _player->GetOrientation());
         // or update at original position
         else
-            //ObjectAccessor::UpdateVisibilityForPlayer(_player);
-            _player->SetToNotify();
+            _player->UpdateObjectVisibility();
     }
     // or update at original position
     else
-        //ObjectAccessor::UpdateVisibilityForPlayer(_player);
-        _player->SetToNotify();
+        _player->UpdateObjectVisibility();
 }
 
 void WorldSession::HandleBinderActivateOpcode( WorldPacket & recv_data )
diff --git a/src/game/Object.cpp b/src/game/Object.cpp
index 4e0f7c01964..40cac8a7891 100644
--- a/src/game/Object.cpp
+++ b/src/game/Object.cpp
@@ -2272,12 +2272,11 @@ void WorldObject::DestroyForNearbyPlayers()
     }
 }
 
-void WorldObject::UpdateObjectVisibility()
+void WorldObject::UpdateObjectVisibility(bool /*forced*/)
 {
-    CellPair p = Trinity::ComputeCellPair(GetPositionX(), GetPositionY());
-    Cell cell(p);
-
-    GetMap()->UpdateObjectVisibility(this, cell, p);
+    //updates object's visibility for nearby players
+    Trinity::VisibleChangesNotifier notifier(*this);
+    VisitNearbyWorldObject(GetMap()->GetVisibilityDistance(), notifier);
 }
 
 struct WorldObjectChangeAccumulator
diff --git a/src/game/Object.h b/src/game/Object.h
index 0b4b71c13a5..d54c510a646 100644
--- a/src/game/Object.h
+++ b/src/game/Object.h
@@ -98,7 +98,6 @@ enum NotifyFlags
     NOTIFY_NONE                     = 0x00,
     NOTIFY_AI_RELOCATION            = 0x01,
     NOTIFY_VISIBILITY_CHANGED       = 0x02,
-    NOTIFY_PLAYER_VISIBILITY        = 0x04,
     NOTIFY_ALL                      = 0xFF
 };
 
@@ -656,19 +655,16 @@ class WorldObject : public Object, public WorldLocation
         void GetCreatureListWithEntryInGrid(std::list<Creature*>& lList, uint32 uiEntry, float fMaxSearchRange);
 
         void DestroyForNearbyPlayers();
-        void UpdateObjectVisibility();
+        virtual void UpdateObjectVisibility(bool forced = true);
         void BuildUpdate(UpdateDataMapType& );
 
-        //new relocation and visibility system functions
+        //relocation and visibility system functions
         void AddToNotify(uint16 f) { m_notifyflags |= f;}
-        void RemoveFromNotify(uint16 f) { m_notifyflags &= ~f;}
         bool isNeedNotify(uint16 f) const { return m_notifyflags & f;}
-
+        uint16 GetNotifyFlags() const { return m_notifyflags; }
         bool NotifyExecuted(uint16 f) const { return m_executed_notifies & f;}
         void SetNotified(uint16 f) { m_executed_notifies |= f;}
-        void ResetNotifies(uint16 f) { m_executed_notifies |= ~f;}
         void ResetAllNotifies() { m_notifyflags = 0; m_executed_notifies = 0; }
-        void ResetAllNotifiesbyMask(uint16 f) { m_notifyflags &= ~f; m_executed_notifies &= ~f; }
 
         bool isActiveObject() const { return m_isActive; }
         void setActive(bool isActiveObject);
diff --git a/src/game/Player.cpp b/src/game/Player.cpp
index 1a5e2720525..73fedb9d7fe 100644
--- a/src/game/Player.cpp
+++ b/src/game/Player.cpp
@@ -2374,8 +2374,7 @@ void Player::SetGameMaster(bool on)
         getHostilRefManager().setOnlineOfflineState(true);
     }
 
-    //ObjectAccessor::UpdateVisibilityForPlayer(this);
-    SetToNotify();
+    UpdateObjectVisibility();
 }
 
 void Player::SetGMVisible(bool on)
@@ -4446,8 +4445,7 @@ void Player::ResurrectPlayer(float restore_percent, bool applySickness)
     sOutdoorPvPMgr.HandlePlayerResurrects(this, newzone);
 
     // update visibility
-    //ObjectAccessor::UpdateVisibilityForPlayer(this);
-    SetToNotify();
+    UpdateObjectVisibility();
 
     if(!applySickness)
         return;
@@ -20123,6 +20121,27 @@ template void Player::UpdateVisibilityOf(Corpse*        target, UpdateData& data
 template void Player::UpdateVisibilityOf(GameObject*    target, UpdateData& data, std::set<Unit*>& visibleNow);
 template void Player::UpdateVisibilityOf(DynamicObject* target, UpdateData& data, std::set<Unit*>& visibleNow);
 
+void Player::UpdateObjectVisibility(bool forced)
+{
+    if (!forced)
+        AddToNotify(NOTIFY_VISIBILITY_CHANGED);
+    else
+    {
+        Unit::UpdateObjectVisibility(true);
+        // updates visibility of all objects around point of view for current player
+        Trinity::VisibleNotifier notifier(*this);
+        m_seer->VisitNearbyObject(GetMap()->GetVisibilityDistance(), notifier);
+        notifier.SendToSelf();   // send gathered data
+    }
+}
+
+void Player::UpdateVisibilityForPlayer()
+{
+    Trinity::VisibleNotifier notifier(*this);
+    m_seer->VisitNearbyObject(GetMap()->GetVisibilityDistance(), notifier);
+    notifier.SendToSelf();   // send gathered data
+}
+
 void Player::InitPrimaryProfessions()
 {
     SetFreePrimaryProfessions(sWorld.getConfig(CONFIG_MAX_PRIMARY_TRADE_SKILL));
diff --git a/src/game/Player.h b/src/game/Player.h
index ae179894121..e6f97770949 100644
--- a/src/game/Player.h
+++ b/src/game/Player.h
@@ -2180,8 +2180,10 @@ class Player : public Unit, public GridObject<Player>
         bool IsVisibleInGridForPlayer(Player const* pl) const;
         bool IsVisibleGloballyFor(Player* pl) const;
 
-        void UpdateVisibilityOf(WorldObject* target);
         void SendInitialVisiblePackets(Unit* target);
+        void UpdateObjectVisibility(bool forced = true);
+        void UpdateVisibilityForPlayer();
+        void UpdateVisibilityOf(WorldObject* target);
 
         template<class T>
             void UpdateVisibilityOf(T* target, UpdateData& data, std::set<Unit*>& visibleNow);
diff --git a/src/game/SpellAuraEffects.cpp b/src/game/SpellAuraEffects.cpp
index f9cf199e90f..c352a72ef4f 100644
--- a/src/game/SpellAuraEffects.cpp
+++ b/src/game/SpellAuraEffects.cpp
@@ -2554,7 +2554,7 @@ void AuraEffect::HandleInvisibilityDetect(AuraApplication const * aurApp, uint8
             target->m_detectInvisibilityMask |= (1 << GetMiscValue());
     }
     if(target->GetTypeId() == TYPEID_PLAYER)
-        target->SetToNotify();
+        target->UpdateObjectVisibility();
 }
 
 void AuraEffect::HandleInvisibility(AuraApplication const * aurApp, uint8 mode, bool apply) const
@@ -2578,7 +2578,7 @@ void AuraEffect::HandleInvisibility(AuraApplication const * aurApp, uint8 mode,
         if(target->GetTypeId() == TYPEID_PLAYER)
             target->SetFlag(PLAYER_FIELD_BYTES2,PLAYER_FIELD_BYTE2_INVISIBILITY_GLOW);
 
-        target->SetToNotify();
+        target->UpdateObjectVisibility();
     }
     else
     {
@@ -2593,7 +2593,7 @@ void AuraEffect::HandleInvisibility(AuraApplication const * aurApp, uint8 mode,
         if(!target->m_invisibilityMask && target->GetTypeId() == TYPEID_PLAYER)
             target->RemoveFlag(PLAYER_FIELD_BYTES2,PLAYER_FIELD_BYTE2_INVISIBILITY_GLOW);
 
-        target->SetToNotify();
+        target->UpdateObjectVisibility();
     }
 }
 
diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index e92fcfad94f..c0d100f2bd4 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -11697,26 +11697,7 @@ bool Unit::canDetectStealthOf(Unit const* target, float distance) const
 void Unit::SetVisibility(UnitVisibility x)
 {
     m_Visibility = x;
-
-    if(IsInWorld())
-    {
-        Map *m = GetMap();
-        CellPair p(Trinity::ComputeCellPair(GetPositionX(), GetPositionY()));
-        Cell cell(p);
-
-        if(GetTypeId() == TYPEID_PLAYER)
-        {
-            m->UpdatePlayerVisibility((Player*)this, cell, p);
-            m->UpdateObjectsVisibilityFor((Player*)this, cell, p);
-        }
-        else
-            m->UpdateObjectVisibility(this, cell, p);
-
-        AddToNotify(NOTIFY_AI_RELOCATION);
-    }
-
-    if (x == VISIBILITY_GROUP_STEALTH)
-        DestroyForNearbyPlayers();
+    UpdateObjectVisibility();
 }
 
 void Unit::UpdateSpeed(UnitMoveType mtype, bool forced)
@@ -13034,7 +13015,6 @@ void Unit::AddToWorld()
     if (!IsInWorld())
     {
         WorldObject::AddToWorld();
-        SetToNotify();
     }
 }
 
@@ -14539,14 +14519,6 @@ bool Unit::HandleAuraRaidProcFromCharge(AuraEffect* triggeredByAura)
 }
 /*-----------------------TRINITY-----------------------------*/
 
-void Unit::SetToNotify()
-{
-    if (GetTypeId() == TYPEID_PLAYER)
-        AddToNotify(NOTIFY_VISIBILITY_CHANGED | NOTIFY_AI_RELOCATION | NOTIFY_PLAYER_VISIBILITY);
-    else
-        AddToNotify(NOTIFY_VISIBILITY_CHANGED | NOTIFY_AI_RELOCATION);
-}
-
 void Unit::Kill(Unit *pVictim, bool durabilityLoss)
 {
     // Prevent killing unit twice (and giving reward from kill twice)
@@ -15483,6 +15455,19 @@ void Unit::SetPhaseMask(uint32 newPhaseMask, bool update)
                 summon->SetPhaseMask(newPhaseMask,true);
 }
 
+void Unit::UpdateObjectVisibility(bool forced)
+{
+    if (!forced)
+        AddToNotify(NOTIFY_VISIBILITY_CHANGED);
+    else
+    {
+        WorldObject::UpdateObjectVisibility(true);
+        // call MoveInLineOfSight for nearby creatures
+        Trinity::AIRelocationNotifier notifier(*this);
+        VisitNearbyObject(GetMap()->GetVisibilityDistance(), notifier);
+    }
+}
+
 void Unit::KnockbackFrom(float x, float y, float speedXY, float speedZ)
 {
     Player *player = NULL;
diff --git a/src/game/Unit.h b/src/game/Unit.h
index 1390d9eb09e..d30f694e88d 100644
--- a/src/game/Unit.h
+++ b/src/game/Unit.h
@@ -1734,6 +1734,7 @@ class Unit : public WorldObject
         bool canDetectInvisibilityOf(Unit const* u) const;
         bool canDetectStealthOf(Unit const* u, float distance) const;
         void SetPhaseMask(uint32 newPhaseMask, bool update);// overwrite WorldObject::SetPhaseMask
+        void UpdateObjectVisibility(bool forced = true);
 
         // virtual functions for all world objects types
         bool isVisibleForInState(Player const* u, bool inVisibleList) const;
@@ -1903,9 +1904,6 @@ class Unit : public WorldObject
 
         uint32 GetModelForForm(ShapeshiftForm form);
 
-        // relocation notification
-        void SetToNotify();
-
         void SetReducedThreatPercent(uint32 pct, uint64 guid)
         {
             m_reducedThreatPercent = pct;
diff --git a/src/shared/Timer.h b/src/shared/Timer.h
index 643f68dba84..3e0a369b655 100644
--- a/src/shared/Timer.h
+++ b/src/shared/Timer.h
@@ -201,6 +201,11 @@ struct PeriodicTimer
             i_period = period;
         }
 
+        // Tracker interface
+        void TUpdate(int32 diff) { i_expireTime -= diff; }
+        bool TPassed() const { return i_expireTime <= 0; }
+        void TReset(int32 diff, int32 period)  { i_expireTime += period > diff ? period : diff; }
+
     private:
 
         int32 i_period;