src/game/TotemAI.cpp

   1 /*
   2  * Copyright (C) 2005-2009 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 "DBCStores.h"
  23 #include "ObjectAccessor.h"
  24 #include "SpellMgr.h"
  25
  26 #include "GridNotifiers.h"
  27 #include "GridNotifiersImpl.h"
  28 #include "CellImpl.h"
  29
  30 int
  31 TotemAI::Permissible(const Creature *creature)
  32 {
  33     if( creature->isTotem() )
  34         return PERMIT_BASE_PROACTIVE;
  35
  36     return PERMIT_BASE_NO;
  37 }
  38
  39 TotemAI::TotemAI(Creature *c) : CreatureAI(c), i_victimGuid(0)
  40 {
  41 }
  42
  43 void
  44 TotemAI::MoveInLineOfSight(Unit *)
  45 {
  46 }
  47
  48 void TotemAI::EnterEvadeMode()
  49 {
  50     m_creature->CombatStop(true);
  51 }
  52
  53 void
  54 TotemAI::UpdateAI(const uint32 /*diff*/)
  55 {
  56     if (getTotem().GetTotemType() != TOTEM_ACTIVE)
  57         return;
  58
  59     if (!m_creature->isAlive() || m_creature->IsNonMeleeSpellCasted(false))
  60         return;
  61
  62     // Search spell
  63     SpellEntry const *spellInfo = sSpellStore.LookupEntry(getTotem().GetSpell());
  64     if (!spellInfo)
  65         return;
  66
  67     // Get spell rangy
  68     SpellRangeEntry const* srange = sSpellRangeStore.LookupEntry(spellInfo->rangeIndex);
  69     float max_range = GetSpellMaxRange(srange);
  70
  71     // SPELLMOD_RANGE not applied in this place just because not existence range mods for attacking totems
  72
  73     // pointer to appropriate target if found any
  74     Unit* victim = i_victimGuid ? ObjectAccessor::GetUnit(*m_creature, i_victimGuid) : NULL;
  75
  76     // Search victim if no, not attackable, or out of range, or friendly (possible in case duel end)
  77     if( !victim ||
  78         !victim->isTargetableForAttack() || !m_creature->IsWithinDistInMap(victim, max_range) ||
  79         m_creature->IsFriendlyTo(victim) || !victim->isVisibleForOrDetect(m_creature,m_creature,false) )
  80     {
  81         CellPair p(MaNGOS::ComputeCellPair(m_creature->GetPositionX(),m_creature->GetPositionY()));
  82         Cell cell(p);
  83         cell.data.Part.reserved = ALL_DISTRICT;
  84
  85         victim = NULL;
  86
  87         MaNGOS::NearestAttackableUnitInObjectRangeCheck u_check(m_creature, m_creature, max_range);
  88         MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck> checker(m_creature,victim, u_check);
  89
  90         TypeContainerVisitor<MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck>, GridTypeMapContainer > grid_object_checker(checker);
  91         TypeContainerVisitor<MaNGOS::UnitLastSearcher<MaNGOS::NearestAttackableUnitInObjectRangeCheck>, WorldTypeMapContainer > world_object_checker(checker);
  92
  93         CellLock<GridReadGuard> cell_lock(cell, p);
  94         cell_lock->Visit(cell_lock, grid_object_checker,  *m_creature->GetMap());
  95         cell_lock->Visit(cell_lock, world_object_checker, *m_creature->GetMap());
  96     }
  97
  98     // If have target
  99     if (victim)
 100     {
 101         // remember
 102         i_victimGuid = victim->GetGUID();
 103
 104         // attack
 105         m_creature->SetInFront(victim);                      // client change orientation by self
 106         m_creature->CastSpell(victim, getTotem().GetSpell(), false);
 107     }
 108     else
 109         i_victimGuid = 0;
 110 }
 111
 112 bool
 113 TotemAI::IsVisible(Unit *) const
 114 {
 115     return false;
 116 }
 117
 118 void
 119 TotemAI::AttackStart(Unit *)
 120 {
 121 }
 122
 123 Totem& TotemAI::getTotem()
 124 {
 125     return static_cast<Totem&>(*m_creature);
 126 }