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TrinityCore/src/server/game/AI/CreatureAI.cpp

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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "CreatureAI.h"
#include "AreaBoundary.h"
#include "Containers.h"
#include "Creature.h"
#include "CreatureAIImpl.h"
#include "CreatureTextMgr.h"
#include "Language.h"
#include "Log.h"
#include "Map.h"
#include "MapReference.h"
#include "MotionMaster.h"
#include "Player.h"
#include "SpellMgr.h"
#include "TemporarySummon.h"
#include "Vehicle.h"
#include "World.h"
//Disable CreatureAI when charmed
void CreatureAI::OnCharmed(bool apply)
{
if (apply)
{
me->NeedChangeAI = true;
me->IsAIEnabled = false;
}
}
std::unordered_map<std::pair<uint32, Difficulty>, AISpellInfoType> UnitAI::AISpellInfo;
AISpellInfoType* GetAISpellInfo(uint32 spellId, Difficulty difficulty)
{
return Trinity::Containers::MapGetValuePtr(UnitAI::AISpellInfo, { spellId, difficulty });
}
CreatureAI::CreatureAI(Creature* creature) : UnitAI(creature), me(creature), _boundary(nullptr), _negateBoundary(false), m_MoveInLineOfSight_locked(false)
{
}
CreatureAI::~CreatureAI()
{
}
void CreatureAI::Talk(uint8 id, WorldObject const* whisperTarget /*= nullptr*/)
{
sCreatureTextMgr->SendChat(me, id, whisperTarget);
}
void CreatureAI::DoZoneInCombat(Creature* creature /*= nullptr*/, float maxRangeToNearestTarget /* = 250.0f*/)
{
if (!creature)
creature = me;
Map* map = creature->GetMap();
if (creature->CanHaveThreatList())
{
if (!map->IsDungeon()) //use IsDungeon instead of Instanceable, in case battlegrounds will be instantiated
{
TC_LOG_ERROR("misc", "DoZoneInCombat call for map that isn't an instance (creature entry = %d)", creature->GetTypeId() == TYPEID_UNIT ? creature->ToCreature()->GetEntry() : 0);
return;
}
if (!creature->HasReactState(REACT_PASSIVE) && !creature->GetVictim())
{
if (Unit* nearTarget = creature->SelectNearestTarget(maxRangeToNearestTarget))
creature->AI()->AttackStart(nearTarget);
else if (creature->IsSummon())
{
if (Unit* summoner = creature->ToTempSummon()->GetSummoner())
{
if (creature->IsFriendlyTo(summoner))
{
Unit* target = summoner->getAttackerForHelper();
if (target && creature->IsHostileTo(target))
creature->AI()->AttackStart(target);
}
}
}
}
// Intended duplicated check, the code above this should select a victim
// If it can't find a suitable attack target then we should error out.
if (!creature->HasReactState(REACT_PASSIVE) && !creature->GetVictim())
{
TC_LOG_ERROR("misc.dozoneincombat", "DoZoneInCombat called for creature that has empty threat list (creature entry = %u)", creature->GetEntry());
return;
}
}
Map::PlayerList const& playerList = map->GetPlayers();
if (playerList.isEmpty())
return;
for (Map::PlayerList::const_iterator itr = playerList.begin(); itr != playerList.end(); ++itr)
if (Player* player = itr->GetSource())
if (player->IsAlive())
creature->EngageWithTarget(player);
}
// scripts does not take care about MoveInLineOfSight loops
// MoveInLineOfSight can be called inside another MoveInLineOfSight and cause stack overflow
void CreatureAI::MoveInLineOfSight_Safe(Unit* who)
{
if (m_MoveInLineOfSight_locked == true)
return;
m_MoveInLineOfSight_locked = true;
MoveInLineOfSight(who);
m_MoveInLineOfSight_locked = false;
}
void CreatureAI::MoveInLineOfSight(Unit* who)
{
if (me->IsEngaged())
return;
if (me->HasReactState(REACT_AGGRESSIVE) && me->CanStartAttack(who, false))
me->EngageWithTarget(who);
}
void CreatureAI::_OnOwnerCombatInteraction(Unit* target)
{
if (!target || !me->IsAlive())
return;
if (!me->HasReactState(REACT_PASSIVE) && me->CanStartAttack(target, true))
me->EngageWithTarget(target);
}
// Distract creature, if player gets too close while stealthed/prowling
void CreatureAI::TriggerAlert(Unit const* who) const
{
// If there's no target, or target isn't a player do nothing
if (!who || who->GetTypeId() != TYPEID_PLAYER)
return;
// If this unit isn't an NPC, is already distracted, is fighting, is confused, stunned or fleeing, do nothing
if (me->GetTypeId() != TYPEID_UNIT || me->IsEngaged() || me->HasUnitState(UNIT_STATE_CONFUSED | UNIT_STATE_STUNNED | UNIT_STATE_FLEEING | UNIT_STATE_DISTRACTED))
return;
// Only alert for hostiles!
if (me->IsCivilian() || me->HasReactState(REACT_PASSIVE) || !me->IsHostileTo(who) || !me->_IsTargetAcceptable(who))
return;
// Send alert sound (if any) for this creature
me->SendAIReaction(AI_REACTION_ALERT);
// Face the unit (stealthed player) and set distracted state for 5 seconds
me->GetMotionMaster()->MoveDistract(5 * IN_MILLISECONDS);
me->StopMoving();
me->SetFacingTo(me->GetAngle(who));
}
void CreatureAI::EnterEvadeMode(EvadeReason why)
{
if (!_EnterEvadeMode(why))
return;
TC_LOG_DEBUG("entities.unit", "Creature %u enters evade mode.", me->GetEntry());
if (!me->GetVehicle()) // otherwise me will be in evade mode forever
{
if (Unit* owner = me->GetCharmerOrOwner())
{
me->GetMotionMaster()->Clear(false);
me->GetMotionMaster()->MoveFollow(owner, PET_FOLLOW_DIST, me->GetFollowAngle(), MOTION_SLOT_ACTIVE);
}
else
{
// Required to prevent attacking creatures that are evading and cause them to reenter combat
// Does not apply to MoveFollow
me->AddUnitState(UNIT_STATE_EVADE);
me->GetMotionMaster()->MoveTargetedHome();
}
}
Reset();
if (me->IsVehicle()) // use the same sequence of addtoworld, aireset may remove all summons!
me->GetVehicleKit()->Reset(true);
}
void CreatureAI::SetGazeOn(Unit* target)
{
if (me->IsValidAttackTarget(target))
{
if (!me->IsFocusing(nullptr, true) && target != me->GetVictim())
AttackStart(target);
me->SetReactState(REACT_PASSIVE);
}
}
bool CreatureAI::UpdateVictimWithGaze()
{
if (!me->IsEngaged())
return false;
if (me->HasReactState(REACT_PASSIVE))
{
if (me->GetVictim())
return true;
else
me->SetReactState(REACT_AGGRESSIVE);
}
if (Unit* victim = me->SelectVictim())
if (!me->IsFocusing(nullptr, true) && victim != me->GetVictim())
AttackStart(victim);
return me->GetVictim() != nullptr;
}
bool CreatureAI::UpdateVictim()
{
if (!me->IsEngaged())
return false;
if (!me->HasReactState(REACT_PASSIVE))
{
if (Unit* victim = me->SelectVictim())
if (!me->IsFocusing(nullptr, true) && victim != me->GetVictim())
AttackStart(victim);
return me->GetVictim() != nullptr;
}
else if (!me->IsInCombat())
{
EnterEvadeMode(EVADE_REASON_NO_HOSTILES);
return false;
}
else if (me->GetVictim())
me->AttackStop();
return true;
}
bool CreatureAI::_EnterEvadeMode(EvadeReason /*why*/)
{
if (!me->IsAlive())
return false;
me->RemoveAurasOnEvade();
// sometimes bosses stuck in combat?
me->GetThreatManager().ClearAllThreat();
me->CombatStop(true);
me->SetLootRecipient(nullptr);
me->ResetPlayerDamageReq();
me->SetLastDamagedTime(0);
me->SetCannotReachTarget(false);
me->DoNotReacquireTarget();
if (me->IsInEvadeMode())
return false;
return true;
}
Optional<QuestGiverStatus> CreatureAI::GetDialogStatus(Player* /*player*/)
{
return {};
}
const uint32 BOUNDARY_VISUALIZE_CREATURE = 15425;
const float BOUNDARY_VISUALIZE_CREATURE_SCALE = 0.25f;
const int8 BOUNDARY_VISUALIZE_STEP_SIZE = 1;
const int32 BOUNDARY_VISUALIZE_FAILSAFE_LIMIT = 750;
const float BOUNDARY_VISUALIZE_SPAWN_HEIGHT = 5.0f;
int32 CreatureAI::VisualizeBoundary(uint32 duration, Unit* owner, bool fill) const
{
typedef std::pair<int32, int32> coordinate;
if (!owner)
return -1;
if (!_boundary || _boundary->empty())
return LANG_CREATURE_MOVEMENT_NOT_BOUNDED;
std::queue<coordinate> Q;
std::unordered_set<coordinate> alreadyChecked;
std::unordered_set<coordinate> outOfBounds;
Position startPosition = owner->GetPosition();
if (!CheckBoundary(&startPosition))
{ // fall back to creature position
startPosition = me->GetPosition();
if (!CheckBoundary(&startPosition))
{ // fall back to creature home position
startPosition = me->GetHomePosition();
if (!CheckBoundary(&startPosition))
return LANG_CREATURE_NO_INTERIOR_POINT_FOUND;
}
}
float spawnZ = startPosition.GetPositionZ() + BOUNDARY_VISUALIZE_SPAWN_HEIGHT;
bool boundsWarning = false;
Q.push({ 0,0 });
while (!Q.empty())
{
coordinate front = Q.front();
bool hasOutOfBoundsNeighbor = false;
for (coordinate off : std::initializer_list<coordinate>{{1,0}, {0,1}, {-1,0}, {0,-1}})
{
coordinate next(front.first + off.first, front.second + off.second);
if (next.first > BOUNDARY_VISUALIZE_FAILSAFE_LIMIT || next.first < -BOUNDARY_VISUALIZE_FAILSAFE_LIMIT || next.second > BOUNDARY_VISUALIZE_FAILSAFE_LIMIT || next.second < -BOUNDARY_VISUALIZE_FAILSAFE_LIMIT)
{
boundsWarning = true;
continue;
}
if (alreadyChecked.find(next) == alreadyChecked.end()) // never check a coordinate twice
{
Position nextPos(startPosition.GetPositionX() + next.first*BOUNDARY_VISUALIZE_STEP_SIZE, startPosition.GetPositionY() + next.second*BOUNDARY_VISUALIZE_STEP_SIZE, startPosition.GetPositionZ());
if (CheckBoundary(&nextPos))
Q.push(next);
else
{
outOfBounds.insert(next);
hasOutOfBoundsNeighbor = true;
}
alreadyChecked.insert(next);
}
else
if (outOfBounds.find(next) != outOfBounds.end())
hasOutOfBoundsNeighbor = true;
}
if (fill || hasOutOfBoundsNeighbor)
if (TempSummon* point = owner->SummonCreature(BOUNDARY_VISUALIZE_CREATURE, Position(startPosition.GetPositionX() + front.first*BOUNDARY_VISUALIZE_STEP_SIZE, startPosition.GetPositionY() + front.second*BOUNDARY_VISUALIZE_STEP_SIZE, spawnZ), TEMPSUMMON_TIMED_DESPAWN, duration * IN_MILLISECONDS))
{
point->SetObjectScale(BOUNDARY_VISUALIZE_CREATURE_SCALE);
point->AddUnitFlag(UNIT_FLAG_STUNNED);
point->SetImmuneToAll(true);
if (!hasOutOfBoundsNeighbor)
point->AddUnitFlag(UNIT_FLAG_NOT_SELECTABLE);
}
Q.pop();
}
return boundsWarning ? LANG_CREATURE_MOVEMENT_MAYBE_UNBOUNDED : 0;
}
bool CreatureAI::CheckBoundary(Position const* who) const
{
if (!_boundary)
return true;
if (!who)
who = me;
return (CreatureAI::IsInBounds(*_boundary, who) != _negateBoundary);
}
bool CreatureAI::IsInBounds(CreatureBoundary const& boundary, Position const* pos)
{
for (AreaBoundary const* areaBoundary : boundary)
if (!areaBoundary->IsWithinBoundary(pos))
return false;
return true;
}
void CreatureAI::SetBoundary(CreatureBoundary const* boundary, bool negateBoundaries /*= false*/)
{
_boundary = boundary;
_negateBoundary = negateBoundaries;
me->DoImmediateBoundaryCheck();
}
bool CreatureAI::CheckInRoom()
{
if (CheckBoundary())
return true;
else
{
EnterEvadeMode(EVADE_REASON_BOUNDARY);
return false;
}
}
Creature* CreatureAI::DoSummon(uint32 entry, Position const& pos, uint32 despawnTime, TempSummonType summonType)
{
return me->SummonCreature(entry, pos, summonType, despawnTime);
}
Creature* CreatureAI::DoSummon(uint32 entry, WorldObject* obj, float radius, uint32 despawnTime, TempSummonType summonType)
{
Position pos = obj->GetRandomNearPosition(radius);
return me->SummonCreature(entry, pos, summonType, despawnTime);
}
Creature* CreatureAI::DoSummonFlyer(uint32 entry, WorldObject* obj, float flightZ, float radius, uint32 despawnTime, TempSummonType summonType)
{
Position pos = obj->GetRandomNearPosition(radius);
pos.m_positionZ += flightZ;
return me->SummonCreature(entry, pos, summonType, despawnTime);
}
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