src/game/TotemAI.cpp

   1 /*
   2  * Copyright (C) 2005-2008 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "TotemAI.h"
  20 #include "Totem.h"
  21 #include "Creature.h"
  22 #include "Player.h"
  23 #include "Database/DBCStores.h"
  24 #include "MapManager.h"
  25 #include "ObjectAccessor.h"
  26 #include "SpellMgr.h"
  27
  28 #include "GridNotifiers.h"
  29 #include "GridNotifiersImpl.h"
  30 #include "CellImpl.h"
  31
  32 int
  33 TotemAI::Permissible(const Creature *creature)
  34 {
  35     if( creature->isTotem() )
  36         return PERMIT_BASE_PROACTIVE;
  37
  38     return PERMIT_BASE_NO;
  39 }
  40
  41 TotemAI::TotemAI(Creature &c) : i_totem(static_cast<Totem&>(c)), i_victimGuid(0)
  42 {
  43 }
  44
  45 void
  46 TotemAI::MoveInLineOfSight(Unit *)
  47 {
  48 }
  49
  50 void TotemAI::EnterEvadeMode()
  51 {
  52     i_totem.CombatStop();
  53 }
  54
  55 void
  56 TotemAI::UpdateAI(const uint32 /*diff*/)
  57 {
  58     if (i_totem.GetTotemType() != TOTEM_ACTIVE)
  59         return;
  60
  61     if (!i_totem.isAlive() || i_totem.IsNonMeleeSpellCasted(false))
  62         return;
  63
  64     // Search spell
  65     SpellEntry const *spellInfo = sSpellStore.LookupEntry(i_totem.GetSpell());
  66     if (!spellInfo)
  67         return;
  68
  69     // Get spell rangy
  70     SpellRangeEntry const* srange = sSpellRangeStore.LookupEntry(spellInfo->rangeIndex);
  71     float max_range = GetSpellMaxRange(srange);
  72
  73     // SPELLMOD_RANGE not applied in this place just because not existence range mods for attacking totems
  74
  75     // pointer to appropriate target if found any
  76     Unit* victim = i_victimGuid ? ObjectAccessor::GetUnit(i_totem, i_victimGuid) : NULL;
  77
  78     // Search victim if no, not attackable, or out of range, or friendly (possible in case duel end)
  79     if( !victim ||
  80         !victim->isTargetableForAttack() || !i_totem.IsWithinDistInMap(victim, max_range) ||
  81         i_totem.IsFriendlyTo(victim) || !victim->isVisibleForOrDetect(&i_totem,false) )
  82     {
  83         CellPair p(MaNGOS::ComputeCellPair(i_totem.GetPositionX(),i_totem.GetPositionY()));
  84         Cell cell(p);
  85         cell.data.Part.reserved = ALL_DISTRICT;
  86
  87         victim = NULL;
  88
  89         MaNGOS::NearestAttackableUnitInObjectRangeCheck u_check(&i_totem, &i_totem, max_range);
  90         MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck> checker(victim, u_check);
  91
  92         TypeContainerVisitor<MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck>, GridTypeMapContainer > grid_object_checker(checker);
  93         TypeContainerVisitor<MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck>, WorldTypeMapContainer > world_object_checker(checker);
  94
  95         CellLock<GridReadGuard> cell_lock(cell, p);
  96         cell_lock->Visit(cell_lock, grid_object_checker,  *i_totem.GetMap());
  97         cell_lock->Visit(cell_lock, world_object_checker, *i_totem.GetMap());
  98     }
  99
 100     // If have target
 101     if (victim)
 102     {
 103         // remember
 104         i_victimGuid = victim->GetGUID();
 105
 106         // attack
 107         i_totem.SetInFront(victim);                         // client change orientation by self
 108         i_totem.CastSpell(victim, i_totem.GetSpell(), false);
 109     }
 110     else
 111         i_victimGuid = 0;
 112 }
 113
 114 bool
 115 TotemAI::IsVisible(Unit *) const
 116 {
 117     return false;
 118 }
 119
 120 void
 121 TotemAI::AttackStart(Unit *)
 122 {
 123 }