src/game/GuardAI.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 "GuardAI.h"
  20 #include "Errors.h"
  21 #include "Creature.h"
  22 #include "Player.h"
  23 #include "World.h"
  24
  25 int GuardAI::Permissible(const Creature* creature)
  26 {
  27     if (creature->IsGuard())
  28         return PERMIT_BASE_SPECIAL;
  29
  30     return PERMIT_BASE_NO;
  31 }
  32
  33 GuardAI::GuardAI(Creature* c) : CreatureAI(c), i_state(STATE_NORMAL), i_tracker(TIME_INTERVAL_LOOK)
  34 {
  35 }
  36
  37 void GuardAI::MoveInLineOfSight(Unit* u)
  38 {
  39     // Ignore Z for flying creatures
  40     if (!m_creature->CanFly() && m_creature->GetDistanceZ(u) > CREATURE_Z_ATTACK_RANGE)
  41         return;
  42
  43     if (!m_creature->getVictim() && u->isTargetableForAttack() &&
  44             (u->IsHostileToPlayers() || m_creature->IsHostileTo(u) /*|| u->getVictim() && m_creature->IsFriendlyTo(u->getVictim())*/) &&
  45             u->isInAccessablePlaceFor(m_creature))
  46     {
  47         float attackRadius = m_creature->GetAttackDistance(u);
  48         if (m_creature->IsWithinDistInMap(u, attackRadius))
  49         {
  50             // Need add code to let guard support player
  51             AttackStart(u);
  52             u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  53         }
  54     }
  55 }
  56
  57 void GuardAI::EnterEvadeMode()
  58 {
  59     if (!m_creature->isAlive())
  60     {
  61         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking because he's dead [guid=%u]", m_creature->GetGUIDLow());
  62         m_creature->StopMoving();
  63         m_creature->GetMotionMaster()->MoveIdle();
  64
  65         i_state = STATE_NORMAL;
  66
  67         i_victimGuid.Clear();
  68         m_creature->CombatStop(true);
  69         m_creature->DeleteThreatList();
  70         return;
  71     }
  72
  73     Unit* victim = m_creature->GetMap()->GetUnit(i_victimGuid);
  74
  75     if (!victim)
  76     {
  77         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, no victim [guid=%u]", m_creature->GetGUIDLow());
  78     }
  79     else if (!victim->isAlive())
  80     {
  81         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is dead [guid=%u]", m_creature->GetGUIDLow());
  82     }
  83     else if (victim->HasStealthAura())
  84     {
  85         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is in stealth [guid=%u]", m_creature->GetGUIDLow());
  86     }
  87     else if (victim->IsTaxiFlying())
  88     {
  89         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim is in flight [guid=%u]", m_creature->GetGUIDLow());
  90     }
  91     else
  92     {
  93         DEBUG_FILTER_LOG(LOG_FILTER_AI_AND_MOVEGENSS, "Creature stopped attacking, victim out run him [guid=%u]", m_creature->GetGUIDLow());
  94     }
  95
  96     m_creature->RemoveAllAuras();
  97     m_creature->DeleteThreatList();
  98     i_victimGuid.Clear();
  99     m_creature->CombatStop(true);
 100     i_state = STATE_NORMAL;
 101
 102     // Remove ChaseMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 103     if (m_creature->GetMotionMaster()->GetCurrentMovementGeneratorType() == CHASE_MOTION_TYPE)
 104         m_creature->GetMotionMaster()->MoveTargetedHome();
 105 }
 106
 107 void GuardAI::UpdateAI(const uint32 /*diff*/)
 108 {
 109     // update i_victimGuid if i_creature.getVictim() !=0 and changed
 110     if (!m_creature->SelectHostileTarget() || !m_creature->getVictim())
 111         return;
 112
 113     i_victimGuid = m_creature->getVictim()->GetObjectGuid();
 114
 115     DoMeleeAttackIfReady();
 116 }
 117
 118 bool GuardAI::IsVisible(Unit* pl) const
 119 {
 120     return m_creature->IsWithinDist(pl, sWorld.getConfig(CONFIG_FLOAT_SIGHT_GUARDER))
 121            && pl->isVisibleForOrDetect(m_creature, m_creature, true);
 122 }
 123
 124 void GuardAI::AttackStart(Unit* u)
 125 {
 126     if (!u)
 127         return;
 128
 129     if (m_creature->Attack(u, true))
 130     {
 131         i_victimGuid = u->GetObjectGuid();
 132         m_creature->AddThreat(u);
 133         m_creature->SetInCombatWith(u);
 134         u->SetInCombatWith(m_creature);
 135
 136         m_creature->GetMotionMaster()->MoveChase(u);
 137     }
 138 }
 139
 140 void GuardAI::JustDied(Unit* killer)
 141 {
 142     if (Player* pkiller = killer->GetCharmerOrOwnerPlayerOrPlayerItself())
 143         m_creature->SendZoneUnderAttackMessage(pkiller);
 144 }