src/game/AggressorAI.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 "AggressorAI.h"
  20 #include "Errors.h"
  21 #include "Creature.h"
  22 #include "ObjectAccessor.h"
  23 #include "VMapFactory.h"
  24 #include "World.h"
  25
  26 #include <list>
  27
  28 int
  29 AggressorAI::Permissible(const Creature *creature)
  30 {
  31     // have some hostile factions, it will be selected by IsHostileTo check at MoveInLineOfSight
  32     if( !creature->isCivilian() && !creature->IsNeutralToAll() )
  33         return PERMIT_BASE_PROACTIVE;
  34
  35     return PERMIT_BASE_NO;
  36 }
  37
  38 AggressorAI::AggressorAI(Creature *c) : CreatureAI(c), i_victimGuid(0), i_state(STATE_NORMAL), i_tracker(TIME_INTERVAL_LOOK)
  39 {
  40 }
  41
  42 void
  43 AggressorAI::MoveInLineOfSight(Unit *u)
  44 {
  45     // Ignore Z for flying creatures
  46     if( !m_creature->canFly() && m_creature->GetDistanceZ(u) > CREATURE_Z_ATTACK_RANGE )
  47         return;
  48
  49     if( !m_creature->hasUnitState(UNIT_STAT_STUNNED) && u->isTargetableForAttack() &&
  50         ( m_creature->IsHostileTo( u ) /*|| u->getVictim() && m_creature->IsFriendlyTo( u->getVictim() )*/ ) &&
  51         u->isInAccessablePlaceFor(m_creature) )
  52     {
  53         float attackRadius = m_creature->GetAttackDistance(u);
  54         if(m_creature->IsWithinDistInMap(u, attackRadius) && m_creature->IsWithinLOSInMap(u) )
  55         {
  56             if(!m_creature->getVictim())
  57             {
  58                 AttackStart(u);
  59                 u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  60             }
  61             else if(sMapStore.LookupEntry(m_creature->GetMapId())->IsDungeon())
  62             {
  63                 m_creature->AddThreat(u, 0.0f);
  64                 u->SetInCombatWith(m_creature);
  65             }
  66         }
  67     }
  68 }
  69
  70 void AggressorAI::EnterEvadeMode()
  71 {
  72     if( !m_creature->isAlive() )
  73     {
  74         DEBUG_LOG("Creature stopped attacking cuz his dead [guid=%u]", m_creature->GetGUIDLow());
  75         i_victimGuid = 0;
  76         m_creature->CombatStop(true);
  77         m_creature->DeleteThreatList();
  78         return;
  79     }
  80
  81     Unit* victim = ObjectAccessor::GetUnit(*m_creature, i_victimGuid );
  82
  83     if( !victim  )
  84     {
  85         DEBUG_LOG("Creature stopped attacking because victim is non exist [guid=%u]", m_creature->GetGUIDLow());
  86     }
  87     else if( !victim->isAlive() )
  88     {
  89         DEBUG_LOG("Creature stopped attacking cuz his victim is dead [guid=%u]", m_creature->GetGUIDLow());
  90     }
  91     else if( victim->HasStealthAura() )
  92     {
  93         DEBUG_LOG("Creature stopped attacking cuz his victim is stealth [guid=%u]", m_creature->GetGUIDLow());
  94     }
  95     else if( victim->isInFlight() )
  96     {
  97         DEBUG_LOG("Creature stopped attacking cuz his victim is fly away [guid=%u]", m_creature->GetGUIDLow());
  98     }
  99     else
 100     {
 101         DEBUG_LOG("Creature stopped attacking due to target out run him [guid=%u]", m_creature->GetGUIDLow());
 102         //i_state = STATE_LOOK_AT_VICTIM;
 103         //i_tracker.Reset(TIME_INTERVAL_LOOK);
 104     }
 105
 106     if(!m_creature->isCharmed())
 107     {
 108         m_creature->RemoveAllAuras();
 109
 110         // Remove TargetedMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 111         if( m_creature->GetMotionMaster()->GetCurrentMovementGeneratorType() == TARGETED_MOTION_TYPE )
 112             m_creature->GetMotionMaster()->MoveTargetedHome();
 113     }
 114
 115     m_creature->DeleteThreatList();
 116     i_victimGuid = 0;
 117     m_creature->CombatStop(true);
 118     m_creature->SetLootRecipient(NULL);
 119 }
 120
 121 void
 122 AggressorAI::UpdateAI(const uint32 /*diff*/)
 123 {
 124     // update i_victimGuid if m_creature->getVictim() !=0 and changed
 125     if(!m_creature->SelectHostilTarget() || !m_creature->getVictim())
 126         return;
 127
 128     i_victimGuid = m_creature->getVictim()->GetGUID();
 129
 130     if( m_creature->isAttackReady() )
 131     {
 132         if( m_creature->IsWithinDistInMap(m_creature->getVictim(), ATTACK_DISTANCE))
 133         {
 134             m_creature->AttackerStateUpdate(m_creature->getVictim());
 135             m_creature->resetAttackTimer();
 136         }
 137     }
 138 }
 139
 140 bool
 141 AggressorAI::IsVisible(Unit *pl) const
 142 {
 143     return m_creature->IsWithinDist(pl,sWorld.getConfig(CONFIG_SIGHT_MONSTER))
 144         && pl->isVisibleForOrDetect(m_creature,m_creature,true);
 145 }
 146
 147 void
 148 AggressorAI::AttackStart(Unit *u)
 149 {
 150     if( !u )
 151         return;
 152
 153     if(m_creature->Attack(u,true))
 154     {
 155         //    DEBUG_LOG("Creature %s tagged a victim to kill [guid=%u]", m_creature->GetName(), u->GetGUIDLow());
 156         i_victimGuid = u->GetGUID();
 157
 158         m_creature->AddThreat(u, 0.0f);
 159         m_creature->SetInCombatWith(u);
 160         u->SetInCombatWith(m_creature);
 161
 162         m_creature->GetMotionMaster()->MoveChase(u);
 163     }
 164 }