src/game/AggressorAI.cpp

   1 /*
   2  * Copyright (C) 2005-2013 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 "AggressorAI.h"
  20 #include "Errors.h"
  21 #include "Creature.h"
  22 #include "SharedDefines.h"
  23 #include "VMapFactory.h"
  24 #include "World.h"
  25 #include "DBCStores.h"
  26 #include "Map.h"
  27
  28 #include <list>
  29
  30 int
  31 AggressorAI::Permissible(const Creature* creature)
  32 {
  33     // have some hostile factions, it will be selected by IsHostileTo check at MoveInLineOfSight
  34     if (!creature->IsCivilian() && !creature->IsNeutralToAll())
  35         return PERMIT_BASE_PROACTIVE;
  36
  37     return PERMIT_BASE_NO;
  38 }
  39
  40 AggressorAI::AggressorAI(Creature* c) : CreatureAI(c), i_state(STATE_NORMAL), i_tracker(TIME_INTERVAL_LOOK)
  41 {
  42 }
  43
  44 void
  45 AggressorAI::MoveInLineOfSight(Unit* u)
  46 {
  47     // Ignore Z for flying creatures
  48     if (!m_creature->CanFly() && m_creature->GetDistanceZ(u) > CREATURE_Z_ATTACK_RANGE)
  49         return;
  50
  51     if (m_creature->CanInitiateAttack() && u->isTargetableForAttack() &&
  52             m_creature->IsHostileTo(u) && u->isInAccessablePlaceFor(m_creature))
  53     {
  54         float attackRadius = m_creature->GetAttackDistance(u);
  55         if (m_creature->IsWithinDistInMap(u, attackRadius) && m_creature->IsWithinLOSInMap(u))
  56         {
  57             if (!m_creature->getVictim())
  58             {
  59                 AttackStart(u);
  60                 u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  61             }
  62             else if (sMapStore.LookupEntry(m_creature->GetMapId())->IsDungeon())
  63             {
  64                 m_creature->AddThreat(u);
  65                 u->SetInCombatWith(m_creature);
  66             }
  67         }
  68     }
  69 }
  70
  71 void AggressorAI::EnterEvadeMode()
  72 {
  73     if (!m_creature->isAlive())
  74     {
  75         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, he is dead [guid=%u]", m_creature->GetGUIDLow());
  76         i_victimGuid.Clear();
  77         m_creature->CombatStop(true);
  78         m_creature->DeleteThreatList();
  79         return;
  80     }
  81
  82     Unit* victim = m_creature->GetMap()->GetUnit(i_victimGuid);
  83
  84     if (!victim)
  85     {
  86         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, no victim [guid=%u]", m_creature->GetGUIDLow());
  87     }
  88     else if (!victim->isAlive())
  89     {
  90         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is dead [guid=%u]", m_creature->GetGUIDLow());
  91     }
  92     else if (victim->HasStealthAura())
  93     {
  94         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is in stealth [guid=%u]", m_creature->GetGUIDLow());
  95     }
  96     else if (victim->IsTaxiFlying())
  97     {
  98         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is in flight [guid=%u]", m_creature->GetGUIDLow());
  99     }
 100     else
 101     {
 102         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim out run him [guid=%u]", m_creature->GetGUIDLow());
 103         // i_state = STATE_LOOK_AT_VICTIM;
 104         // i_tracker.Reset(TIME_INTERVAL_LOOK);
 105     }
 106
 107     if (!m_creature->isCharmed())
 108     {
 109         m_creature->RemoveAllAuras();
 110
 111         // Remove ChaseMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 112         if (m_creature->GetMotionMaster()->GetCurrentMovementGeneratorType() == CHASE_MOTION_TYPE)
 113             m_creature->GetMotionMaster()->MoveTargetedHome();
 114     }
 115
 116     m_creature->DeleteThreatList();
 117     i_victimGuid.Clear();
 118     m_creature->CombatStop(true);
 119     m_creature->SetLootRecipient(NULL);
 120 }
 121
 122 void
 123 AggressorAI::UpdateAI(const uint32 /*diff*/)
 124 {
 125     // update i_victimGuid if m_creature->getVictim() !=0 and changed
 126     if (!m_creature->SelectHostileTarget() || !m_creature->getVictim())
 127         return;
 128
 129     i_victimGuid = m_creature->getVictim()->GetObjectGuid();
 130
 131     DoMeleeAttackIfReady();
 132 }
 133
 134 bool
 135 AggressorAI::IsVisible(Unit* pl) const
 136 {
 137     return m_creature->IsWithinDist(pl, sWorld.getConfig(CONFIG_FLOAT_SIGHT_MONSTER))
 138            && pl->isVisibleForOrDetect(m_creature, m_creature, true);
 139 }
 140
 141 void
 142 AggressorAI::AttackStart(Unit* u)
 143 {
 144     if (!u)
 145         return;
 146
 147     if (m_creature->Attack(u, true))
 148     {
 149         i_victimGuid = u->GetObjectGuid();
 150
 151         m_creature->AddThreat(u);
 152         m_creature->SetInCombatWith(u);
 153         u->SetInCombatWith(m_creature);
 154
 155         m_creature->GetMotionMaster()->MoveChase(u);
 156     }
 157 }