src/game/GuardAI.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 "GuardAI.h"
  20 #include "Errors.h"
  21 #include "Creature.h"
  22 #include "Player.h"
  23 #include "ObjectAccessor.h"
  24 #include "World.h"
  25
  26 int GuardAI::Permissible(const Creature *creature)
  27 {
  28     if( creature->isGuard())
  29         return PERMIT_BASE_SPECIAL;
  30
  31     return PERMIT_BASE_NO;
  32 }
  33
  34 GuardAI::GuardAI(Creature *c) : CreatureAI(c), i_victimGuid(0), i_state(STATE_NORMAL), i_tracker(TIME_INTERVAL_LOOK)
  35 {
  36 }
  37
  38 void GuardAI::MoveInLineOfSight(Unit *u)
  39 {
  40     // Ignore Z for flying creatures
  41     if (!m_creature->canFly() && m_creature->GetDistanceZ(u) > CREATURE_Z_ATTACK_RANGE)
  42         return;
  43
  44     if (!m_creature->getVictim() && u->isTargetableForAttack() &&
  45         ( u->IsHostileToPlayers() || m_creature->IsHostileTo(u) /*|| u->getVictim() && m_creature->IsFriendlyTo(u->getVictim())*/ ) &&
  46         u->isInAccessablePlaceFor(m_creature))
  47     {
  48         float attackRadius = m_creature->GetAttackDistance(u);
  49         if (m_creature->IsWithinDistInMap(u,attackRadius))
  50         {
  51             //Need add code to let guard support player
  52             AttackStart(u);
  53             u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  54         }
  55     }
  56 }
  57
  58 void GuardAI::EnterEvadeMode()
  59 {
  60     if (!m_creature->isAlive())
  61     {
  62         DEBUG_LOG("Creature stopped attacking because he's dead [guid=%u]", m_creature->GetGUIDLow());
  63         m_creature->StopMoving();
  64         m_creature->GetMotionMaster()->MoveIdle();
  65
  66         i_state = STATE_NORMAL;
  67
  68         i_victimGuid = 0;
  69         m_creature->CombatStop(true);
  70         m_creature->DeleteThreatList();
  71         return;
  72     }
  73
  74     Unit* victim = ObjectAccessor::GetUnit(*m_creature, i_victimGuid );
  75
  76     if (!victim)
  77     {
  78         DEBUG_LOG("Creature stopped attacking because victim is non exist [guid=%u]", m_creature->GetGUIDLow());
  79     }
  80     else if (!victim->isAlive())
  81     {
  82         DEBUG_LOG("Creature stopped attacking because victim is dead [guid=%u]", m_creature->GetGUIDLow());
  83     }
  84     else if (victim->HasStealthAura())
  85     {
  86         DEBUG_LOG("Creature stopped attacking because victim is using stealth [guid=%u]", m_creature->GetGUIDLow());
  87     }
  88     else if (victim->isInFlight())
  89     {
  90         DEBUG_LOG("Creature stopped attacking because victim is flying away [guid=%u]", m_creature->GetGUIDLow());
  91     }
  92     else
  93     {
  94         DEBUG_LOG("Creature stopped attacking because victim outran him [guid=%u]", m_creature->GetGUIDLow());
  95     }
  96
  97     m_creature->RemoveAllAuras();
  98     m_creature->DeleteThreatList();
  99     i_victimGuid = 0;
 100     m_creature->CombatStop(true);
 101     i_state = STATE_NORMAL;
 102
 103     // Remove TargetedMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 104     if (m_creature->GetMotionMaster()->GetCurrentMovementGeneratorType() == TARGETED_MOTION_TYPE)
 105         m_creature->GetMotionMaster()->MoveTargetedHome();
 106 }
 107
 108 void GuardAI::UpdateAI(const uint32 /*diff*/)
 109 {
 110     // update i_victimGuid if i_creature.getVictim() !=0 and changed
 111     if (!m_creature->SelectHostilTarget() || !m_creature->getVictim())
 112         return;
 113
 114     i_victimGuid = m_creature->getVictim()->GetGUID();
 115
 116     if (m_creature->isAttackReady())
 117     {
 118         if (m_creature->IsWithinDistInMap(m_creature->getVictim(), ATTACK_DISTANCE))
 119         {
 120             m_creature->AttackerStateUpdate(m_creature->getVictim());
 121             m_creature->resetAttackTimer();
 122         }
 123     }
 124 }
 125
 126 bool GuardAI::IsVisible(Unit *pl) const
 127 {
 128     return m_creature->IsWithinDist(pl,sWorld.getConfig(CONFIG_SIGHT_GUARDER))
 129         && pl->isVisibleForOrDetect(m_creature,m_creature,true);
 130 }
 131
 132 void GuardAI::AttackStart(Unit *u)
 133 {
 134     if( !u )
 135         return;
 136
 137     //    DEBUG_LOG("Creature %s tagged a victim to kill [guid=%u]", i_creature.GetName(), u->GetGUIDLow());
 138     if(m_creature->Attack(u,true))
 139     {
 140         i_victimGuid = u->GetGUID();
 141         m_creature->AddThreat(u, 0.0f);
 142         m_creature->SetInCombatWith(u);
 143         u->SetInCombatWith(m_creature);
 144
 145         m_creature->GetMotionMaster()->MoveChase(u);
 146     }
 147 }
 148
 149 void GuardAI::JustDied(Unit *killer)
 150 {
 151     if(Player* pkiller = killer->GetCharmerOrOwnerPlayerOrPlayerItself())
 152         m_creature->SendZoneUnderAttackMessage(pkiller);
 153 }