src/game/ReactorAI.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 "ByteBuffer.h"
  20 #include "ReactorAI.h"
  21 #include "Errors.h"
  22 #include "Creature.h"
  23 #include "TargetedMovementGenerator.h"
  24 #include "FactionTemplateResolver.h"
  25 #include "Log.h"
  26
  27 #define REACTOR_VISIBLE_RANGE (26.46f)
  28
  29 int
  30 ReactorAI::Permissible(const Creature *creature)
  31 {
  32     if( creature->IsNeutralToAll() )
  33         return PERMIT_BASE_REACTIVE;
  34
  35     return PERMIT_BASE_NO;
  36 }
  37
  38 void
  39 ReactorAI::MoveInLineOfSight(Unit *)
  40 {
  41 }
  42
  43 void
  44 ReactorAI::AttackStart(Unit *p)
  45 {
  46     if( i_creature.getVictim() == NULL )
  47     {
  48         if(i_creature.Attack(p))
  49         {
  50             DEBUG_LOG("Tag unit LowGUID(%u) HighGUID(%u) as a victim", p->GetGUIDLow(), p->GetGUIDHigh());
  51             i_victimGuid = p->GetGUID();
  52             i_creature->Mutate(new TargetedMovementGenerator(*p));
  53             if (p->GetTypeId() == TYPEID_PLAYER)
  54                 i_creature.SetLootRecipient((Player*)p);
  55         }
  56     }
  57 }
  58
  59 void
  60 ReactorAI::AttackStop(Unit *)
  61 {
  62
  63 }
  64
  65 void
  66 ReactorAI::HealBy(Unit *healer, uint32 amount_healed)
  67 {
  68 }
  69
  70 void
  71 ReactorAI::DamageInflict(Unit *healer, uint32 amount_healed)
  72 {
  73 }
  74
  75 bool
  76 ReactorAI::IsVisible(Unit *pl) const
  77 {
  78     return false;
  79 }
  80
  81 void
  82 ReactorAI::UpdateAI(const uint32 time_diff)
  83 {
  84     // update i_victimGuid if i_creature.getVictim() !=0 and changed
  85     if(i_creature.getVictim())
  86         i_victimGuid = i_creature.getVictim()->GetGUID();
  87
  88     // i_creature.getVictim() can't be used for check in case stop fighting, i_creature.getVictim() cleared at Unit death etc.
  89     if( i_victimGuid )
  90     {
  91         if( needToStop() )
  92         {
  93             DEBUG_LOG("Creature %u stopped attacking.", i_creature.GetGUIDLow());
  94             stopAttack();                                   // i_victimGuid == 0 && i_creature.getVictim() == NULL now
  95             return;
  96         }
  97         else if( i_creature.IsStopped() )
  98         {
  99             if( i_creature.isAttackReady() )
 100             {
 101                 Unit* newtarget = i_creature.SelectHostilTarget();
 102                 if(newtarget)
 103                     AttackStart(newtarget);
 104
 105                 if(!i_creature.canReachWithAttack(i_creature.getVictim()))
 106                     return;
 107                 i_creature.AttackerStateUpdate(i_creature.getVictim());
 108                 i_creature.resetAttackTimer();
 109
 110                 if ( !i_creature.getVictim() )
 111                     return;
 112
 113                 if( needToStop() )
 114                     stopAttack();
 115             }
 116         }
 117     }
 118 }
 119
 120 bool
 121 ReactorAI::needToStop() const
 122 {
 123     if( !i_creature.isAlive() || !i_creature.getVictim() || !i_creature.getVictim()->isTargetableForAttack() )
 124         return true;
 125
 126     if(!i_creature.getVictim()->isInAccessablePlaceFor(&i_creature))
 127         return true;
 128
 129     float rx,ry,rz;
 130     i_creature.GetRespawnCoord(rx, ry, rz);
 131     float spawndist=i_creature.GetDistanceSq(rx,ry,rz);
 132     float length = i_creature.GetDistanceSq(i_creature.getVictim());
 133     float hostillen=i_creature.GetHostility( i_creature.getVictim()->GetGUID())/(2.5f * i_creature.getLevel()+1.0f);
 134     return (( length > (10.0f + hostillen) * (10.0f + hostillen) && spawndist > 6400.0f )
 135         || ( length > (20.0f + hostillen) * (20.0f + hostillen) && spawndist > 2500.0f )
 136         || ( length > (30.0f + hostillen) * (30.0f + hostillen) ));
 137 }
 138
 139 void
 140 ReactorAI::stopAttack()
 141 {
 142     if( !i_creature.isAlive() )
 143     {
 144         DEBUG_LOG("Creature stoped attacking cuz his dead [guid=%u]", i_creature.GetGUIDLow());
 145         i_creature->MovementExpired();
 146         i_creature->Idle();
 147         i_victimGuid = 0;
 148         i_creature.CombatStop();
 149         return;
 150     }
 151
 152     assert( i_victimGuid );
 153
 154     Unit* victim = ObjectAccessor::Instance().GetUnit(i_creature, i_victimGuid );
 155
 156     if( !victim  )
 157     {
 158         DEBUG_LOG("Creature stopped attacking because victim is non exist [guid=%u]", i_creature.GetGUIDLow());
 159     }
 160     else if( victim->isStealth() )
 161     {
 162         DEBUG_LOG("Creature stopped attacking cuz his victim is stealth [guid=%u]", i_creature.GetGUIDLow());
 163     }
 164     else if( victim->isInFlight() )
 165     {
 166         DEBUG_LOG("Creature stopped attacking cuz his victim is fly away [guid=%u]", i_creature.GetGUIDLow());
 167     }
 168     else
 169     {
 170         DEBUG_LOG("Creature stopped attacking due to target %s [guid=%u]", victim->isAlive() ? "out run him" : "is dead", i_creature.GetGUIDLow());
 171     }
 172
 173     // TargetedMovementGenerator can be already remove at i_creature death and not updated i_victimGuid
 174     if( i_creature->top()->GetMovementGeneratorType() == TARGETED_MOTION_TYPE )
 175         static_cast<TargetedMovementGenerator *>(i_creature->top())->TargetedHome(i_creature);
 176
 177     i_victimGuid = 0;
 178     i_creature.AttackStop();
 179 }