src/game/AggressorAI.cpp

   1 /*
   2  * Copyright (C) 2005,2006,2007 MaNGOS <http://www.mangosproject.org/>
   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 "TargetedMovementGenerator.h"
  24 #include "Database/DBCStores.h"
  25 #include "ObjectAccessor.h"
  26 #include <list>
  27 #include "VMapFactory.h"
  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->IsNeutralToAll() && !creature->isCivilian() )
  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     if( !i_creature.getVictim() && !i_creature.hasUnitState(UNIT_STAT_STUNDED) && u->isTargetableForAttack() &&
  47         ( i_creature.IsHostileTo( u ) /*|| u->getVictim() && i_creature.IsFriendlyTo( u->getVictim() )*/ ) &&
  48         u->isInAccessablePlaceFor(&i_creature) )
  49     {
  50         float attackRadius = i_creature.GetAttackDistance(u);
  51         if(i_creature.IsWithinDistInMap(u, attackRadius) && i_creature.GetDistanceZ(u) <= CREATURE_Z_ATTACK_RANGE)
  52         {
  53             if(!i_creature.IsWithinLOSInMap(u)) return;
  54             AttackStart(u);
  55             if(u->HasStealthAura())
  56                 u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  57         }
  58     }
  59 }
  60
  61 bool
  62 AggressorAI::_needToStop() const
  63 {
  64     if( !i_creature.isAlive() || !i_creature.getVictim())
  65         return true;
  66
  67     //if(!i_creature.getVictim()->isTargetableForAttack() || !i_creature.getVictim()->isInAccessablePlaceFor(&i_creature))
  68     //return true;
  69     //no need for this checks because mob changes its victim only when
  70     //1) victim is dead (check is in SelectHostilTarget() func)
  71     //2) victim is out of threat radius
  72
  73     // chaise only at same map
  74     if(!i_creature.IsInMap(i_creature.getVictim()))
  75         return true;
  76
  77     // instance not have threat radius for stop
  78     Map* map = MapManager::Instance().GetMap(i_creature.GetMapId(),&i_creature);
  79     if(map->Instanceable())
  80         return false;
  81
  82     float rx,ry,rz;
  83     i_creature.GetRespawnCoord(rx, ry, rz);
  84     float length = i_creature.getVictim()->GetDistanceSq(rx,ry,rz);
  85     return ( length > CREATURE_THREAT_RADIUS );
  86 }
  87
  88 void AggressorAI::_stopAttack()
  89 {
  90     DEBUG_LOG("What we do HERE ?");
  91     return;
  92 }
  93
  94 void AggressorAI::EnterEvadeMode()
  95 {
  96     if( !i_creature.isAlive() )
  97     {
  98         DEBUG_LOG("Creature stopped attacking cuz his dead [guid=%u]", i_creature.GetGUIDLow());
  99         i_victimGuid = 0;
 100         i_creature.CombatStop(true);
 101         i_creature.DeleteThreatList();
 102         return;
 103     }
 104
 105     Unit* victim = ObjectAccessor::Instance().GetUnit(i_creature, i_victimGuid );
 106
 107     if( !victim  )
 108     {
 109         DEBUG_LOG("Creature stopped attacking because victim is non exist [guid=%u]", i_creature.GetGUIDLow());
 110     }
 111     else if( !victim->isAlive() )
 112     {
 113         DEBUG_LOG("Creature stopped attacking cuz his victim is dead [guid=%u]", i_creature.GetGUIDLow());
 114     }
 115     else if( victim->HasStealthAura() )
 116     {
 117         DEBUG_LOG("Creature stopped attacking cuz his victim is stealth [guid=%u]", i_creature.GetGUIDLow());
 118     }
 119     else if( victim->isInFlight() )
 120     {
 121         DEBUG_LOG("Creature stopped attacking cuz his victim is fly away [guid=%u]", i_creature.GetGUIDLow());
 122     }
 123     else
 124     {
 125         DEBUG_LOG("Creature stopped attacking due to target out run him [guid=%u]", i_creature.GetGUIDLow());
 126         //i_state = STATE_LOOK_AT_VICTIM;
 127         //i_tracker.Reset(TIME_INTERVAL_LOOK);
 128     }
 129
 130     i_creature.RemoveAllAuras();
 131     i_creature.DeleteThreatList();
 132     i_victimGuid = 0;
 133     i_creature.CombatStop(true);
 134
 135     // Remove TargetedMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 136     if( i_creature->top()->GetMovementGeneratorType() == TARGETED_MOTION_TYPE )
 137         i_creature->TargetedHome();
 138 }
 139
 140 void
 141 AggressorAI::UpdateAI(const uint32 diff)
 142 {
 143     // update i_victimGuid if i_creature.getVictim() !=0 and changed
 144     if(!i_creature.SelectHostilTarget() || !i_creature.getVictim())
 145         return;
 146
 147     i_victimGuid = i_creature.getVictim()->GetGUID();
 148
 149     // i_creature.getVictim() can't be used for check in case stop fighting, i_creature.getVictim() clearóâ at Unit death etc.
 150     if( i_victimGuid )
 151     {
 152         if( _needToStop() )
 153         {
 154             DEBUG_LOG("Aggressor AI stoped attacking [guid=%u]", i_creature.GetGUIDLow());
 155             EnterEvadeMode();                               // i_victimGuid == 0 && i_creature.getVictim() == NULL now
 156             return;
 157         }
 158
 159         assert((i_victimGuid != 0) == (i_creature.getVictim() != NULL) && "i_victimGuid and i_creature.getVictim() not synchronized.");
 160
 161         if( i_creature.IsWithinDistInMap(i_creature.getVictim(), ATTACK_DISTANCE))
 162         {
 163             if( i_creature.isAttackReady() )
 164             {
 165                 i_creature.AttackerStateUpdate(i_creature.getVictim());
 166                 i_creature.resetAttackTimer();
 167             }
 168         }
 169     }
 170 }
 171
 172 bool
 173 AggressorAI::IsVisible(Unit *pl) const
 174 {
 175     return i_creature.GetDistanceSq(pl) < sWorld.getConfig(CONFIG_SIGHT_MONSTER)
 176         && pl->isVisibleForOrDetect(&i_creature,true);
 177 }
 178
 179 void
 180 AggressorAI::AttackStart(Unit *u)
 181 {
 182     if( !u )
 183         return;
 184
 185     sLog.outDetail("Start to attack");
 186     if(i_creature.Attack(u))
 187     {
 188         i_creature.AddThreat(u, 0.0f);
 189         //    DEBUG_LOG("Creature %s tagged a victim to kill [guid=%u]", i_creature.GetName(), u->GetGUIDLow());
 190         i_victimGuid = u->GetGUID();
 191
 192         i_creature.resetAttackTimer();
 193         i_creature->Mutate(new TargetedMovementGenerator(*u));
 194         if (u->GetTypeId() == TYPEID_PLAYER)
 195             i_creature.SetLootRecipient((Player*)u);
 196     }
 197 }