99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
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* Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
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* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
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*/
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#ifndef ACORE_TARGETEDMOVEMENTGENERATOR_H
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#define ACORE_TARGETEDMOVEMENTGENERATOR_H
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#include "FollowerReference.h"
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#include "MovementGenerator.h"
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#include "PathGenerator.h"
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#include "Timer.h"
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#include "Unit.h"
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#include <optional>
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class TargetedMovementGeneratorBase
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{
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public:
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TargetedMovementGeneratorBase(Unit* target) { i_target.link(target, this); }
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void stopFollowing() { }
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protected:
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FollowerReference i_target;
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};
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template<class T>
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class ChaseMovementGenerator : public MovementGeneratorMedium<T, ChaseMovementGenerator<T>>, public TargetedMovementGeneratorBase
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{
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public:
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ChaseMovementGenerator(Unit* target, std::optional<ChaseRange> range = {}, std::optional<ChaseAngle> angle = {})
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: TargetedMovementGeneratorBase(target), i_path(nullptr), i_recheckDistance(0), i_recalculateTravel(true), _range(range), _angle(angle) {}
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~ChaseMovementGenerator() { }
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MovementGeneratorType GetMovementGeneratorType() { return CHASE_MOTION_TYPE; }
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bool DoUpdate(T*, uint32);
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void DoInitialize(T*);
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void DoFinalize(T*);
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void DoReset(T*);
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void MovementInform(T*);
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bool PositionOkay(T* owner, Unit* target, std::optional<float> maxDistance, std::optional<ChaseAngle> angle);
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void unitSpeedChanged() { _lastTargetPosition.reset(); }
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Unit* GetTarget() const { return i_target.getTarget(); }
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bool EnableWalking() const { return false; }
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bool HasLostTarget(Unit* unit) const { return unit->GetVictim() != this->GetTarget(); }
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private:
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std::unique_ptr<PathGenerator> i_path;
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TimeTrackerSmall i_recheckDistance;
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bool i_recalculateTravel;
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std::optional<Position> _lastTargetPosition;
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std::optional<ChaseRange> const _range;
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std::optional<ChaseAngle> const _angle;
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bool _movingTowards = true;
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bool _mutualChase = true;
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};
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template<class T>
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class FollowMovementGenerator : public MovementGeneratorMedium<T, FollowMovementGenerator<T>>, public TargetedMovementGeneratorBase
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{
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public:
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FollowMovementGenerator(Unit* target, float range, ChaseAngle angle)
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: TargetedMovementGeneratorBase(target), i_path(nullptr), i_recheckDistance(0), i_recalculateTravel(true), _range(range), _angle(angle) {}
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~FollowMovementGenerator() { }
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MovementGeneratorType GetMovementGeneratorType() { return FOLLOW_MOTION_TYPE; }
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bool DoUpdate(T*, uint32);
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void DoInitialize(T*);
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void DoFinalize(T*);
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void DoReset(T*);
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void MovementInform(T*);
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Unit* GetTarget() const { return i_target.getTarget(); }
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void unitSpeedChanged() { _lastTargetPosition.reset(); }
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bool PositionOkay(T* owner, Unit* target, float range, std::optional<ChaseAngle> angle = {});
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static void _clearUnitStateMove(T* u) { u->ClearUnitState(UNIT_STATE_FOLLOW_MOVE); }
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static void _addUnitStateMove(T* u) { u->AddUnitState(UNIT_STATE_FOLLOW_MOVE); }
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void _updateSpeed(T* owner);
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private:
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std::unique_ptr<PathGenerator> i_path;
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TimeTrackerSmall i_recheckDistance;
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bool i_recalculateTravel;
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std::optional<Position> _lastTargetPosition;
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float _range;
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ChaseAngle _angle;
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};
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#endif
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