ConfusedMovementGenerator.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 "ConfusedMovementGenerator.h"
#include "Creature.h"
#include "MovementDefines.h"
#include "MoveSpline.h"
#include "MoveSplineInit.h"
#include "PathGenerator.h"
#include "Player.h"
#include "Random.h"
 
template<class T>
ConfusedMovementGenerator<T>::ConfusedMovementGenerator() : _timer(0), _reference(0.f, 0.f, 0.f)
{
    this->Priority = MOTION_PRIORITY_HIGHEST;
    this->Flags = MOVEMENTGENERATOR_FLAG_INITIALIZATION_PENDING;
    this->BaseUnitState = UNIT_STATE_CONFUSED;
}
 
template<class T>
MovementGeneratorType ConfusedMovementGenerator<T>::GetMovementGeneratorType() const
{
    return CONFUSED_MOTION_TYPE;
}
 
template<class T>
bool ConfusedMovementGenerator<T>::DoInitialize(T* owner)
{
    this->RemoveFlag(MOVEMENTGENERATOR_FLAG_INITIALIZATION_PENDING | MOVEMENTGENERATOR_FLAG_TRANSITORY | MOVEMENTGENERATOR_FLAG_DEACTIVATED);
    this->AddFlag(MOVEMENTGENERATOR_FLAG_INITIALIZED);
 
    if (!owner->IsAlive())
        return false;
 
    // TODO: UNIT_FIELD_FLAGS should not be handled by generators
    owner->SetUnitFlag(UNIT_FLAG_CONFUSED);
 
    _timer.Reset(0);
    owner->GetPosition(_reference.m_positionX, _reference.m_positionY, _reference.m_positionZ);
 
    _path = nullptr;
    SetTargetLocation(owner);
    return true;
}
 
template<class T>
bool ConfusedMovementGenerator<T>::DoReset(T* owner)
{
    this->RemoveFlag(MOVEMENTGENERATOR_FLAG_TRANSITORY | MOVEMENTGENERATOR_FLAG_DEACTIVATED);
 
    return DoInitialize(owner);
}
 
template<class T>
bool ConfusedMovementGenerator<T>::DoUpdate(T* owner, uint32 diff)
{
    if (!owner->IsAlive())
        return false;
 
    if (owner->HasUnitState(UNIT_STATE_NOT_MOVE) || owner->IsMovementPreventedByCasting())
    {
        this->AddFlag(MOVEMENTGENERATOR_FLAG_INTERRUPTED);
        owner->StopMoving();
        _path = nullptr;
        return true;
    }
    else
        this->RemoveFlag(MOVEMENTGENERATOR_FLAG_INTERRUPTED);
 
    // waiting for next move
    _timer.Update(diff);
    if ((this->HasFlag(MOVEMENTGENERATOR_FLAG_SPEED_UPDATE_PENDING) && !owner->movespline->Finalized()) || (_timer.Passed() && owner->movespline->Finalized()))
    {
        this->RemoveFlag(MOVEMENTGENERATOR_FLAG_TRANSITORY);
        SetTargetLocation(owner);
    }
 
    return true;
}
 
template<class T>
void ConfusedMovementGenerator<T>::DoDeactivate(T* owner)
{
    this->AddFlag(MOVEMENTGENERATOR_FLAG_DEACTIVATED);
    owner->ClearUnitState(UNIT_STATE_CONFUSED_MOVE);
}
 
template<class T>
void ConfusedMovementGenerator<T>::DoFinalize(T* owner, bool active, bool/* movementInform*/)
{
    this->AddFlag(MOVEMENTGENERATOR_FLAG_FINALIZED);
 
    if (active)
    {
        owner->RemoveUnitFlag(UNIT_FLAG_CONFUSED);
        owner->ClearUnitState(UNIT_STATE_CONFUSED_MOVE);
 
        if constexpr (std::is_base_of_v<Creature, T>)
        {
            if (Unit* victim = owner->GetVictim())
                owner->SetTarget(victim->GetGUID());
        }
        else if constexpr (std::is_base_of_v<Player, T>)
            owner->StopMoving();
    }
}
 
template<class T>
void ConfusedMovementGenerator<T>::SetTargetLocation(T* owner)
{
    if (!owner)
        return;
 
    Position destination(_reference);
    float distance = 4.0f * frand(0.0f, 1.0f) - 2.0f;
    float angle = frand(0.0f, 1.0f) * float(M_PI) * 2.0f;
    owner->MovePositionToFirstCollision(destination, distance, angle);
 
    // Check if the destination is in LOS
    if (!owner->IsWithinLOS(destination.GetPositionX(), destination.GetPositionY(), destination.GetPositionZ()))
    {
        // Retry later on
        _timer.Reset(200);
        return;
    }
 
    if (!_path)
    {
        _path = std::make_unique<PathGenerator>(owner);
        _path->SetPathLengthLimit(30.0f);
    }
 
    bool result = _path->CalculatePath(destination.GetPositionX(), destination.GetPositionY(), destination.GetPositionZ());
    if (!result || (_path->GetPathType() & PATHFIND_NOPATH)
        || (_path->GetPathType() & PATHFIND_SHORTCUT)
        || (_path->GetPathType() & PATHFIND_FARFROMPOLY))
    {
        _timer.Reset(100);
        return;
    }
 
    owner->AddUnitState(UNIT_STATE_CONFUSED_MOVE);
 
    Movement::MoveSplineInit init(owner);
    init.MovebyPath(_path->GetPath());
    init.SetWalk(true);
    int32 traveltime = init.Launch();
    _timer.Reset(traveltime + urand(800, 1500));
}
 
template class ConfusedMovementGenerator<Player>;
template class ConfusedMovementGenerator<Creature>;