src/game/AggressorAI.cpp

   1 /*
   2  * Copyright (C) 2005,2006 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 "Utilities.h"
  24 #include "TargetedMovementGenerator.h"
  25 #include "Database/DBCStores.h"
  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->IsNeutralToAll() )
  33         return PERMIT_BASE_PROACTIVE;
  34
  35     return PERMIT_BASE_NO;
  36 }
  37
  38 AggressorAI::AggressorAI(Creature &c) : i_creature(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     if( !i_creature.getVictim() && u->isTargetableForAttack() && IsVisible(u) && u->isInAccessablePlaceFor(&i_creature))
  46     {
  47         float attackRadius = i_creature.GetAttackDistance(u);
  48         if(i_creature.IsWithinDist(u, attackRadius) && i_creature.GetDistanceZ(u) <= CREATURE_Z_ATTACK_RANGE)
  49         {
  50             if( i_creature.IsHostileTo( u ) )
  51             {
  52                 AttackStart(u);
  53                 if(u->HasStealthAura())
  54                     u->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);
  55             }
  56         }
  57     }
  58 }
  59
  60 void
  61 AggressorAI::HealBy(Unit *healer, uint32 amount_healed)
  62 {
  63 }
  64
  65 void
  66 AggressorAI::DamageInflict(Unit *healer, uint32 amount_healed)
  67 {
  68 }
  69
  70 bool
  71 AggressorAI::_needToStop() const
  72 {
  73     if( !i_creature.isAlive() || !i_creature.getVictim() || !i_creature.getVictim()->isTargetableForAttack() )
  74         return true;
  75
  76     if(!i_creature.getVictim()->isInAccessablePlaceFor(&i_creature))
  77         return true;
  78
  79     float rx,ry,rz;
  80     i_creature.GetRespawnCoord(rx, ry, rz);
  81     float spawndist=i_creature.GetDistanceSq(rx,ry,rz);
  82     float length = i_creature.GetDistanceSq(i_creature.getVictim());
  83     float hostillen=i_creature.GetHostilityDistance( i_creature.getVictim()->GetGUID() );
  84     return (( length > (10.0f + hostillen) * (10.0f + hostillen) && spawndist > 6400.0f )
  85         || ( length > (20.0f + hostillen) * (20.0f + hostillen) && spawndist > 2500.0f )
  86         || ( length > (30.0f + hostillen) * (30.0f + hostillen) ));
  87 }
  88
  89 void AggressorAI::AttackStop(Unit *)
  90 {
  91 }
  92
  93 void AggressorAI::_stopAttack()
  94 {
  95     if( !i_creature.isAlive() )
  96     {
  97         DEBUG_LOG("Creature stopped attacking cuz his dead [guid=%u]", i_creature.GetGUIDLow());
  98         i_victimGuid = 0;
  99         i_creature.CombatStop();
 100         return;
 101     }
 102
 103     assert( i_victimGuid );
 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_victimGuid = 0;
 131     i_creature.AttackStop();
 132
 133     // Remove TargetedMovementGenerator from MotionMaster stack list, and add HomeMovementGenerator instead
 134     if( i_creature->top()->GetMovementGeneratorType() == TARGETED_MOTION_TYPE )
 135         i_creature->TargetedHome();
 136 }
 137
 138 void
 139 AggressorAI::UpdateAI(const uint32 diff)
 140 {
 141     // update i_victimGuid if i_creature.getVictim() !=0 and changed
 142     if(i_creature.getVictim())
 143         i_victimGuid = i_creature.getVictim()->GetGUID();
 144
 145     // i_creature.getVictim() can't be used for check in case stop fighting, i_creature.getVictim() clearóâ at Unit death etc.
 146     if( i_victimGuid )
 147     {
 148         if( _needToStop() )
 149         {
 150             DEBUG_LOG("Aggressor AI stoped attacking [guid=%u]", i_creature.GetGUIDLow());
 151             _stopAttack();                                  // i_victimGuid == 0 && i_creature.getVictim() == NULL now
 152             return;
 153         }
 154
 155         assert((i_victimGuid != 0) == (i_creature.getVictim() != NULL) && "i_victimGuid and i_creature.getVictim() not synchronized.");
 156
 157         //switch( i_state )
 158         //{
 159         /*case STATE_LOOK_AT_VICTIM:
 160         {
 161             if( IsVisible(i_pVictim) )
 162             {
 163                 DEBUG_LOG("Victim %u re-enters creature's aggro radius fater stop attacking", i_pVictim->GetGUIDLow());
 164                 i_state = STATE_NORMAL;
 165                 i_creature->MovementExpired();
 166                 break;                                  // move on
 167                 // back to the cat and mice game if you move back in range
 168             }
 169
 170             i_tracker.Update(diff);
 171             if( i_tracker.Passed() )
 172             {
 173                 i_creature->MovementExpired();
 174                 DEBUG_LOG("Creature running back home [guid=%u]", i_creature.GetGUIDLow());
 175                 if( i_creature->top()->GetMovementGeneratorType() == MovementGenerator::TARGETED_MOTION_TYPE )
 176                     static_cast<TargetedMovementGenerator *>(i_creature->top())->TargetedHome(i_creature);
 177                 i_state = STATE_NORMAL;
 178                 i_pVictim = NULL;
 179             }
 180             else
 181             {
 182
 183                 float dx = i_pVictim->GetPositionX() - i_creature.GetPositionX();
 184                 float dy = i_pVictim->GetPositionY() - i_creature.GetPositionY();
 185                 float orientation = (float)atan2((double)dy, (double)dx);
 186                 i_creature.Relocate(i_pVictim->GetPositionX(), i_pVictim->GetPositionY(), i_pVictim->GetPositionZ(), orientation);
 187             }
 188
 189             break;
 190         }*/
 191         //case STATE_NORMAL:
 192         //{
 193         if( i_creature.IsStopped() )
 194         {
 195             if( i_creature.isAttackReady() )
 196             {
 197                 Unit* newtarget = i_creature.SelectHostilTarget();
 198                 if(newtarget)
 199                     AttackStart(newtarget);
 200
 201                 if(!i_creature.canReachWithAttack(i_creature.getVictim()))
 202                     return;
 203                 i_creature.AttackerStateUpdate(i_creature.getVictim());
 204                 i_creature.resetAttackTimer();
 205
 206                 if ( !i_creature.getVictim() )
 207                     return;
 208
 209                 if( _needToStop() )
 210                     _stopAttack();
 211             }
 212         }
 213         //   break;
 214         //}
 215         //default:
 216         //    break;
 217         //}
 218     }
 219 }
 220
 221 bool
 222 AggressorAI::IsVisible(Unit *pl) const
 223 {
 224     bool seestealth = true;
 225     uint32 sight = sWorld.getConfig(CONFIG_SIGHT_MONSTER);
 226     float dist = i_creature.GetDistanceSq(pl);
 227     if(pl->HasStealthAura())
 228     {
 229         int32 seevaluse;
 230         int notfront = i_creature.isInFront(pl, sight) ? 0 : 1;
 231         seevaluse = 5  + i_creature.getLevel() * 5 + i_creature.m_detectStealth - pl->m_stealthvalue - (uint32)sqrt(dist/100) - 50 * notfront;
 232         if(seevaluse<0)
 233             seestealth = false;
 234         else if(seevaluse>=int32(urand(0,30)))
 235             seestealth = true;
 236         else seestealth = false;
 237     }
 238                                                             // offset=1.0
 239     return seestealth && (dist * 1.0 <= sight) ;
 240 }
 241
 242 void
 243 AggressorAI::AttackStart(Unit *u)
 244 {
 245     if( i_creature.getVictim() || !u )
 246         return;
 247     //    DEBUG_LOG("Creature %s tagged a victim to kill [guid=%u]", i_creature.GetName(), u->GetGUIDLow());
 248     i_victimGuid = u->GetGUID();
 249     i_creature.Attack(u);
 250     i_creature.resetAttackTimer();
 251     i_creature->Mutate(new TargetedMovementGenerator(*u));
 252     if (u->GetTypeId() == TYPEID_PLAYER)
 253         i_creature.SetLootRecipient((Player*)u);
 254 }