src/game/AggressorAI.cpp

   1 /*
   2  * Copyright (C) 2005-2008 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 "Player.h"
  23 #include "ObjectAccessor.h"
  24 #include "VMapFactory.h"
  25 #include "World.h"
  26
  27 #include <list>
  28
  29 int
  30 AggressorAI::Permissible(const Creature *creature)
  31 {
  32     // have some hostile factions, it will be selected by IsHostileTo check at MoveInLineOfSight
  33     if( !creature->isCivilian() && !creature->IsNeutralToAll() )
  34         return PERMIT_BASE_PROACTIVE;
  35
  36     return PERMIT_BASE_NO;
  37 }
  38
  39 AggressorAI::AggressorAI(Creature &c) : i_creature(c), i_victimGuid(0), i_state(STATE_NORMAL), i_tracker(TIME_INTERVAL_LOOK)
  40 {
  41 }
  42
  43 void
  44 AggressorAI::MoveInLineOfSight(Unit *u)
  45 {
  46     // Ignore Z for flying creatures
  47     if( !i_creature.canFly() && i_creature.GetDistanceZ(u) > CREATURE_Z_ATTACK_RANGE )
  48         return;
  49
  50     if( !i_creature.getVictim() && !i_creature.hasUnitState(UNIT_STAT_STUNNED) && u->isTargetableForAttack() &&
  51         ( i_creature.IsHostileTo( u ) /*|| u->getVictim() && i_creature.IsFriendlyTo( u->getVictim() )*/ ) &&
  52         u->isInAccessablePlaceFor(&i_creature) )
  53     {
  54         float attackRadius = i_creature.GetAttackDistance(u);
  55         if(i_creature.IsWithinDistInMap(u, attackRadius) && i_creature.IsWithinLOSInMap(u) )
  56         {
  57             AttackStart(u);
  58             u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  59         }
  60     }
  61 }
  62
  63 void AggressorAI::EnterEvadeMode()
  64 {
  65     if( !i_creature.isAlive() )
  66     {
  67         DEBUG_LOG("Creature stopped attacking cuz his dead [guid=%u]", i_creature.GetGUIDLow());
  68         i_victimGuid = 0;
  69         i_creature.CombatStop();
  70         i_creature.DeleteThreatList();
  71         return;
  72     }
  73
  74     Unit* victim = ObjectAccessor::GetUnit(i_creature, i_victimGuid );
  75
  76     if( !victim  )
  77     {
  78         DEBUG_LOG("Creature stopped attacking because victim is non exist [guid=%u]", i_creature.GetGUIDLow());
  79     }
  80     else if( !victim->isAlive() )
  81     {
  82         DEBUG_LOG("Creature stopped attacking cuz his victim is dead [guid=%u]", i_creature.GetGUIDLow());
  83     }
  84     else if( victim->HasStealthAura() )
  85     {
  86         DEBUG_LOG("Creature stopped attacking cuz his victim is stealth [guid=%u]", i_creature.GetGUIDLow());
  87     }
  88     else if( victim->isInFlight() )
  89     {
  90         DEBUG_LOG("Creature stopped attacking cuz his victim is fly away [guid=%u]", i_creature.GetGUIDLow());
  91     }
  92     else
  93     {
  94         DEBUG_LOG("Creature stopped attacking due to target out run him [guid=%u]", i_creature.GetGUIDLow());
  95         //i_state = STATE_LOOK_AT_VICTIM;
  96         //i_tracker.Reset(TIME_INTERVAL_LOOK);
  97     }
  98
  99     if(!i_creature.isCharmed())
 100     {
 101         i_creature.RemoveAllAuras();
 102
 103         // Remove TargetedMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 104         if( i_creature.GetMotionMaster()->GetCurrentMovementGeneratorType() == TARGETED_MOTION_TYPE )
 105             i_creature.GetMotionMaster()->MoveTargetedHome();
 106     }
 107
 108     i_creature.DeleteThreatList();
 109     i_victimGuid = 0;
 110     i_creature.CombatStop();
 111     i_creature.SetLootRecipient(NULL);
 112 }
 113
 114 void
 115 AggressorAI::UpdateAI(const uint32 /*diff*/)
 116 {
 117     // update i_victimGuid if i_creature.getVictim() !=0 and changed
 118     if(!i_creature.SelectHostilTarget() || !i_creature.getVictim())
 119         return;
 120
 121     i_victimGuid = i_creature.getVictim()->GetGUID();
 122
 123     if( i_creature.isAttackReady() )
 124     {
 125         if( i_creature.IsWithinDistInMap(i_creature.getVictim(), ATTACK_DISTANCE))
 126         {
 127             i_creature.AttackerStateUpdate(i_creature.getVictim());
 128             i_creature.resetAttackTimer();
 129         }
 130     }
 131 }
 132
 133 bool
 134 AggressorAI::IsVisible(Unit *pl) const
 135 {
 136     return i_creature.GetDistance(pl) < sWorld.getConfig(CONFIG_SIGHT_MONSTER)
 137         && pl->isVisibleForOrDetect(&i_creature,true);
 138 }
 139
 140 void
 141 AggressorAI::AttackStart(Unit *u)
 142 {
 143     if( !u )
 144         return;
 145
 146     if(i_creature.Attack(u,true))
 147     {
 148         i_creature.SetInCombatWith(u);
 149         u->SetInCombatWith(&i_creature);
 150
 151         i_creature.AddThreat(u, 0.0f);
 152         //    DEBUG_LOG("Creature %s tagged a victim to kill [guid=%u]", i_creature.GetName(), u->GetGUIDLow());
 153         i_victimGuid = u->GetGUID();
 154
 155         i_creature.GetMotionMaster()->MoveChase(u);
 156     }
 157 }