Object.h

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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/>.
 */
 
#ifndef _OBJECT_H
#define _OBJECT_H
 
#include "Common.h"
#include "Duration.h"
#include "EventProcessor.h"
#include "MapDefines.h"
#include "ModelIgnoreFlags.h"
#include "MovementInfo.h"
#include "ObjectDefines.h"
#include "ObjectGuid.h"
#include "Optional.h"
#include "Position.h"
#include "SharedDefines.h"
#include "SpellDefines.h"
#include "UniqueTrackablePtr.h"
#include "UpdateFields.h"
#include "UpdateMask.h"
#include <list>
#include <set>
#include <unordered_map>
 
class Corpse;
class Creature;
class CreatureAI;
class DynamicObject;
class GameObject;
class InstanceScript;
class Item;
class Map;
class Player;
class Spell;
class SpellCastTargets;
class SpellEffectInfo;
class SpellInfo;
class TempSummon;
class Transport;
class Unit;
class UpdateData;
class WorldObject;
class WorldPacket;
class ZoneScript;
struct FactionTemplateEntry;
struct QuaternionData;
 
typedef std::unordered_map<Player*, UpdateData> UpdateDataMapType;
 
float const DEFAULT_COLLISION_HEIGHT = 2.03128f; // Most common value in dbc
static constexpr Milliseconds const HEARTBEAT_INTERVAL = 5s + 200ms;
 
class TC_GAME_API Object
{
    public:
        virtual ~Object();
 
        bool IsInWorld() const { return m_inWorld; }
 
        virtual void AddToWorld();
        virtual void RemoveFromWorld();
 
        static ObjectGuid GetGUID(Object const* o) { return o ? o->GetGUID() : ObjectGuid::Empty; }
        ObjectGuid GetGUID() const { return GetGuidValue(OBJECT_FIELD_GUID); }
        PackedGuid const& GetPackGUID() const { return m_PackGUID; }
        uint32 GetEntry() const { return GetUInt32Value(OBJECT_FIELD_ENTRY); }
        void SetEntry(uint32 entry) { SetUInt32Value(OBJECT_FIELD_ENTRY, entry); }
 
        float GetObjectScale() const { return GetFloatValue(OBJECT_FIELD_SCALE_X); }
        virtual void SetObjectScale(float scale) { SetFloatValue(OBJECT_FIELD_SCALE_X, scale); }
 
        virtual uint32 GetDynamicFlags() const { return 0; }
        bool HasDynamicFlag(uint32 flag) const { return (GetDynamicFlags() & flag) != 0; }
        virtual void SetDynamicFlag(uint32 flag) { ReplaceAllDynamicFlags(GetDynamicFlags() | flag); }
        virtual void RemoveDynamicFlag(uint32 flag) { ReplaceAllDynamicFlags(GetDynamicFlags() & ~flag); }
        virtual void ReplaceAllDynamicFlags([[maybe_unused]] uint32 flag) { }
 
        TypeID GetTypeId() const { return m_objectTypeId; }
        bool isType(uint16 mask) const { return (mask & m_objectType) != 0; }
 
        virtual void BuildCreateUpdateBlockForPlayer(UpdateData* data, Player* target) const;
        void SendUpdateToPlayer(Player* player);
 
        void BuildValuesUpdateBlockForPlayer(UpdateData* data, Player const* target) const;
        void BuildOutOfRangeUpdateBlock(UpdateData* data) const;
        void BuildMovementUpdateBlock(UpdateData* data, uint32 flags = 0) const;
 
        virtual void DestroyForPlayer(Player* target, bool onDeath = false) const;
 
        int32 GetInt32Value(uint16 index) const;
        uint32 GetUInt32Value(uint16 index) const;
        uint64 GetUInt64Value(uint16 index) const;
        float GetFloatValue(uint16 index) const;
        uint8 GetByteValue(uint16 index, uint8 offset) const;
        uint16 GetUInt16Value(uint16 index, uint8 offset) const;
        ObjectGuid GetGuidValue(uint16 index) const;
 
        void SetInt32Value(uint16 index, int32 value);
        void SetUInt32Value(uint16 index, uint32 value);
        void UpdateUInt32Value(uint16 index, uint32 value);
        void SetUInt64Value(uint16 index, uint64 value);
        void SetFloatValue(uint16 index, float value);
        void SetByteValue(uint16 index, uint8 offset, uint8 value);
        void SetUInt16Value(uint16 index, uint8 offset, uint16 value);
        void SetInt16Value(uint16 index, uint8 offset, int16 value) { SetUInt16Value(index, offset, (uint16)value); }
        void SetGuidValue(uint16 index, ObjectGuid value);
        void SetStatFloatValue(uint16 index, float value);
        void SetStatInt32Value(uint16 index, int32 value);
 
        bool AddGuidValue(uint16 index, ObjectGuid value);
        bool RemoveGuidValue(uint16 index, ObjectGuid value);
 
        void ApplyModUInt32Value(uint16 index, int32 val, bool apply);
        void ApplyModInt32Value(uint16 index, int32 val, bool apply);
        void ApplyModPositiveFloatValue(uint16 index, float val, bool apply);
        void ApplyModSignedFloatValue(uint16 index, float val, bool apply);
 
        void SetFlag(uint16 index, uint32 newFlag);
        void RemoveFlag(uint16 index, uint32 oldFlag);
        void ToggleFlag(uint16 index, uint32 flag);
        bool HasFlag(uint16 index, uint32 flag) const;
        void ApplyModFlag(uint16 index, uint32 flag, bool apply);
 
        void SetByteFlag(uint16 index, uint8 offset, uint8 newFlag);
        void RemoveByteFlag(uint16 index, uint8 offset, uint8 newFlag);
        void ToggleByteFlag(uint16 index, uint8 offset, uint8 flag);
        bool HasByteFlag(uint16 index, uint8 offset, uint8 flag) const;
        void ApplyModByteFlag(uint16 index, uint8 offset, uint8 flag, bool apply);
 
        void SetFlag64(uint16 index, uint64 newFlag);
        void RemoveFlag64(uint16 index, uint64 oldFlag);
        void ToggleFlag64(uint16 index, uint64 flag);
        bool HasFlag64(uint16 index, uint64 flag) const;
        void ApplyModFlag64(uint16 index, uint64 flag, bool apply);
 
        void ClearUpdateMask(bool remove);
 
        uint16 GetValuesCount() const { return m_valuesCount; }
 
        virtual bool hasQuest(uint32 /* quest_id */) const { return false; }
        virtual bool hasInvolvedQuest(uint32 /* quest_id */) const { return false; }
        void SetIsNewObject(bool enable) { m_isNewObject = enable; }
        virtual void BuildUpdate(UpdateDataMapType&) { }
        void BuildFieldsUpdate(Player*, UpdateDataMapType &) const;
 
        void SetFieldNotifyFlag(uint16 flag) { _fieldNotifyFlags |= flag; }
        void RemoveFieldNotifyFlag(uint16 flag) { _fieldNotifyFlags &= uint16(~flag); }
 
        // FG: some hacky helpers
        void ForceValuesUpdateAtIndex(uint32);
 
        inline bool IsWorldObject() const { return isType(TYPEMASK_WORLDOBJECT); }
        static WorldObject* ToWorldObject(Object* o) { return o ? o->ToWorldObject() : nullptr; }
        static WorldObject const* ToWorldObject(Object const* o) { return o ? o->ToWorldObject() : nullptr; }
        WorldObject* ToWorldObject() { if (IsWorldObject()) return reinterpret_cast<WorldObject*>(this); else return nullptr; }
        WorldObject const* ToWorldObject() const { if (IsWorldObject()) return reinterpret_cast<WorldObject const*>(this); else return nullptr; }
 
        inline bool IsItem() const { return isType(TYPEMASK_ITEM); }
        static Item* ToItem(Object* o) { return o ? o->ToItem() : nullptr; }
        static Item const* ToItem(Object const* o) { return o ? o->ToItem() : nullptr; }
        Item* ToItem() { if (IsItem()) return reinterpret_cast<Item*>(this); else return nullptr; }
        Item const* ToItem() const { if (IsItem()) return reinterpret_cast<Item const*>(this); else return nullptr; }
 
        inline bool IsPlayer() const { return GetTypeId() == TYPEID_PLAYER; }
        static Player* ToPlayer(Object* o) { return o ? o->ToPlayer() : nullptr; }
        static Player const* ToPlayer(Object const* o) { return o ? o->ToPlayer() : nullptr; }
        Player* ToPlayer() { if (IsPlayer()) return reinterpret_cast<Player*>(this); else return nullptr; }
        Player const* ToPlayer() const { if (IsPlayer()) return reinterpret_cast<Player const*>(this); else return nullptr; }
 
        inline bool IsCreature() const { return GetTypeId() == TYPEID_UNIT; }
        static Creature* ToCreature(Object* o) { return o ? o->ToCreature() : nullptr; }
        static Creature const* ToCreature(Object const* o) { return o ? o->ToCreature() : nullptr; }
        Creature* ToCreature() { if (IsCreature()) return reinterpret_cast<Creature*>(this); else return nullptr; }
        Creature const* ToCreature() const { if (IsCreature()) return reinterpret_cast<Creature const*>(this); else return nullptr; }
 
        inline bool IsUnit() const { return isType(TYPEMASK_UNIT); }
        static Unit* ToUnit(Object* o) { return o ? o->ToUnit() : nullptr; }
        static Unit const* ToUnit(Object const* o) { return o ? o->ToUnit() : nullptr; }
        Unit* ToUnit() { if (IsUnit()) return reinterpret_cast<Unit*>(this); else return nullptr; }
        Unit const* ToUnit() const { if (IsUnit()) return reinterpret_cast<Unit const*>(this); else return nullptr; }
 
        inline bool IsGameObject() const { return GetTypeId() == TYPEID_GAMEOBJECT; }
        static GameObject* ToGameObject(Object* o) { return o ? o->ToGameObject() : nullptr; }
        static GameObject const* ToGameObject(Object const* o) { return o ? o->ToGameObject() : nullptr; }
        GameObject* ToGameObject() { if (IsGameObject()) return reinterpret_cast<GameObject*>(this); else return nullptr; }
        GameObject const* ToGameObject() const { if (IsGameObject()) return reinterpret_cast<GameObject const*>(this); else return nullptr; }
 
        inline bool IsCorpse() const { return GetTypeId() == TYPEID_CORPSE; }
        static Corpse* ToCorpse(Object* o) { return o ? o->ToCorpse() : nullptr; }
        static Corpse const* ToCorpse(Object const* o) { return o ? o->ToCorpse() : nullptr; }
        Corpse* ToCorpse() { if (IsCorpse()) return reinterpret_cast<Corpse*>(this); else return nullptr; }
        Corpse const* ToCorpse() const { if (IsCorpse()) return reinterpret_cast<Corpse const*>(this); else return nullptr; }
 
        inline bool IsDynObject() const { return GetTypeId() == TYPEID_DYNAMICOBJECT; }
        static DynamicObject* ToDynObject(Object* o) { return o ? o->ToDynObject() : nullptr; }
        static DynamicObject const* ToDynObject(Object const* o) { return o ? o->ToDynObject() : nullptr; }
        DynamicObject* ToDynObject() { if (IsDynObject()) return reinterpret_cast<DynamicObject*>(this); else return nullptr; }
        DynamicObject const* ToDynObject() const { if (IsDynObject()) return reinterpret_cast<DynamicObject const*>(this); else return nullptr; }
 
        virtual std::string GetDebugInfo() const;
 
        Trinity::unique_weak_ptr<Object> GetWeakPtr() const { return m_scriptRef; }
 
    protected:
        Object();
 
        void _InitValues();
        void _Create(ObjectGuid const& guid);
        std::string _ConcatFields(uint16 startIndex, uint16 size) const;
        [[nodiscard]] bool _LoadIntoDataField(std::string const& data, uint32 startOffset, uint32 count);
 
        uint32 GetUpdateFieldData(Player const* target, uint32*& flags) const;
 
        void BuildMovementUpdate(ByteBuffer* data, uint16 flags) const;
        virtual void BuildValuesUpdate(uint8 updatetype, ByteBuffer* data, Player const* target) const;
 
        uint16 m_objectType;
 
        TypeID m_objectTypeId;
        uint16 m_updateFlag;
 
        union
        {
            int32  *m_int32Values;
            uint32 *m_uint32Values;
            float  *m_floatValues;
        };
 
        UpdateMask _changesMask;
 
        uint16 m_valuesCount;
 
        uint16 _fieldNotifyFlags;
 
        virtual bool AddToObjectUpdate() = 0;
        virtual void RemoveFromObjectUpdate() = 0;
        void AddToObjectUpdateIfNeeded();
 
        bool m_objectUpdated;
 
    private:
        bool m_inWorld;
        bool m_isNewObject;
 
        PackedGuid m_PackGUID;
 
        struct NoopObjectDeleter { void operator()(Object*) const { /*noop - not managed*/ } };
        Trinity::unique_trackable_ptr<Object> m_scriptRef;
 
        // for output helpfull error messages from asserts
        bool PrintIndexError(uint32 index, bool set) const;
 
        Object(Object const& right) = delete;
        Object(Object&& right) = delete;
        Object& operator=(Object const& right) = delete;
        Object& operator=(Object&& right) = delete;
};
 
template <class T_VALUES, class T_FLAGS, class FLAG_TYPE, size_t ARRAY_SIZE>
class FlaggedValuesArray32
{
    public:
        FlaggedValuesArray32()
        {
            for (uint32 i = 0; i < ARRAY_SIZE; ++i)
                m_values[i] = T_VALUES(0);
            m_flags = 0;
        }
 
        T_FLAGS GetFlags() const { return m_flags; }
        bool HasFlag(FLAG_TYPE flag) const { return m_flags & (1 << flag); }
        void AddFlag(FLAG_TYPE flag) { m_flags |= (1 << flag); }
        void DelFlag(FLAG_TYPE flag) { m_flags &= ~(1 << flag); }
 
        T_VALUES GetValue(FLAG_TYPE flag) const { return m_values[flag]; }
        void SetValue(FLAG_TYPE flag, T_VALUES value) { m_values[flag] = value; }
        void AddValue(FLAG_TYPE flag, T_VALUES value) { m_values[flag] += value; }
 
    private:
        T_VALUES m_values[ARRAY_SIZE];
        T_FLAGS m_flags;
};
 
struct FindCreatureOptions
{
    Optional<uint32> CreatureId;
    Optional<std::string_view> StringId;
 
    Optional<bool> IsAlive;
    Optional<bool> IsInCombat;
    Optional<bool> IsSummon;
 
    bool IgnorePhases = false;
    bool IgnoreNotOwnedPrivateObjects = true;
    bool IgnorePrivateObjects = false;
 
    Optional<uint32> AuraSpellId;
    Optional<ObjectGuid> OwnerGuid;
    Optional<ObjectGuid> CharmerGuid;
    Optional<ObjectGuid> CreatorGuid;
    Optional<ObjectGuid> PrivateObjectOwnerGuid;
};
 
struct FindGameObjectOptions
{
    Optional<uint32> GameObjectId;
    Optional<std::string_view> StringId;
 
    Optional<bool> IsSummon;
    Optional<bool> IsSpawned;
 
    bool IgnorePhases = false;
    bool IgnoreNotOwnedPrivateObjects = true;
    bool IgnorePrivateObjects = false;
 
    Optional<ObjectGuid> OwnerGuid;
    Optional<ObjectGuid> PrivateObjectOwnerGuid;
    Optional<GameobjectTypes> GameObjectType;
};
 
class TC_GAME_API WorldObject : public Object, public WorldLocation
{
    protected:
        explicit WorldObject(bool isWorldObject); //note: here it means if it is in grid object list or world object list
    public:
        virtual ~WorldObject();
 
        virtual void Update(uint32 diff);
 
        void AddToWorld() override;
        void RemoveFromWorld() override;
 
        void GetNearPoint2D(WorldObject const* searcher, float& x, float& y, float distance, float absAngle) const;
        void GetNearPoint(WorldObject const* searcher, float& x, float& y, float& z, float distance2d, float absAngle) const;
        void GetClosePoint(float& x, float& y, float& z, float size, float distance2d = 0, float relAngle = 0) const;
        void MovePosition(Position &pos, float dist, float angle);
        Position GetNearPosition(float dist, float angle);
        void MovePositionToFirstCollision(Position &pos, float dist, float angle);
        Position GetFirstCollisionPosition(float dist, float angle);
        Position GetRandomNearPosition(float radius);
        void GetContactPoint(WorldObject const* obj, float& x, float& y, float& z, float distance2d = CONTACT_DISTANCE) const;
 
        virtual float GetCombatReach() const { return 0.0f; } // overridden (only) in Unit
        void UpdateGroundPositionZ(float x, float y, float &z) const;
        void UpdateAllowedPositionZ(float x, float y, float &z, float* groundZ = nullptr) const;
 
        void GetRandomPoint(Position const& srcPos, float distance, float& rand_x, float& rand_y, float& rand_z) const;
        Position GetRandomPoint(Position const& srcPos, float distance) const;
 
        uint32 GetInstanceId() const { return m_InstanceId; }
 
        virtual void SetPhaseMask(uint32 newPhaseMask, bool update);
        uint32 GetPhaseMask() const { return m_phaseMask; }
        bool InSamePhase(uint32 phasemask) const { return (GetPhaseMask() & phasemask) != 0; }
        bool InSamePhase(WorldObject const* obj) const { return obj && InSamePhase(obj->GetPhaseMask()); }
        static bool InSamePhase(WorldObject const* a, WorldObject const* b) { return a && a->InSamePhase(b); }
 
        uint32 GetZoneId() const { return m_zoneId; }
        uint32 GetAreaId() const { return m_areaId; }
        void GetZoneAndAreaId(uint32& zoneid, uint32& areaid) const { zoneid = m_zoneId, areaid = m_areaId; }
        bool IsInWorldPvpZone() const;
        bool IsOutdoors() const { return m_outdoors; }
        ZLiquidStatus GetLiquidStatus() const { return m_liquidStatus; }
 
        InstanceScript* GetInstanceScript() const;
 
        std::string const& GetName() const { return m_name; }
        void SetName(std::string newname) { m_name = std::move(newname); }
 
        virtual std::string const& GetNameForLocaleIdx(LocaleConstant /*locale*/) const { return m_name; }
 
        float GetDistance(WorldObject const* obj) const;
        float GetDistance(Position const& pos) const;
        float GetDistance(float x, float y, float z) const;
        float GetDistance2d(WorldObject const* obj) const;
        float GetDistance2d(float x, float y) const;
        float GetDistanceZ(WorldObject const* obj) const;
 
        bool IsSelfOrInSameMap(WorldObject const* obj) const;
        bool IsInMap(WorldObject const* obj) const;
        bool IsWithinDist3d(float x, float y, float z, float dist) const;
        bool IsWithinDist3d(Position const* pos, float dist) const;
        bool IsWithinDist2d(float x, float y, float dist) const;
        bool IsWithinDist2d(Position const* pos, float dist) const;
        // use only if you will sure about placing both object at same map
        bool IsWithinDist(WorldObject const* obj, float dist2compare, bool is3D = true) const;
        bool IsWithinDistInMap(WorldObject const* obj, float dist2compare, bool is3D = true, bool incOwnRadius = true, bool incTargetRadius = true) const;
        bool IsWithinLOS(float x, float y, float z, LineOfSightChecks checks = LINEOFSIGHT_ALL_CHECKS, VMAP::ModelIgnoreFlags ignoreFlags = VMAP::ModelIgnoreFlags::Nothing) const;
        bool IsWithinLOSInMap(WorldObject const* obj, LineOfSightChecks checks = LINEOFSIGHT_ALL_CHECKS, VMAP::ModelIgnoreFlags ignoreFlags = VMAP::ModelIgnoreFlags::Nothing) const;
        Position GetHitSpherePointFor(Position const& dest) const;
        void GetHitSpherePointFor(Position const& dest, float& x, float& y, float& z) const;
        bool GetDistanceOrder(WorldObject const* obj1, WorldObject const* obj2, bool is3D = true) const;
        bool IsInRange(WorldObject const* obj, float minRange, float maxRange, bool is3D = true) const;
        bool IsInRange2d(float x, float y, float minRange, float maxRange) const;
        bool IsInRange3d(float x, float y, float z, float minRange, float maxRange) const;
        bool isInFront(WorldObject const* target, float arc = float(M_PI)) const;
        bool isInBack(WorldObject const* target, float arc = float(M_PI)) const;
 
        bool IsInBetween(Position const& pos1, Position const& pos2, float size = 0) const;
        bool IsInBetween(WorldObject const* obj1, WorldObject const* obj2, float size = 0) const { return obj1 && obj2 && IsInBetween(obj1->GetPosition(), obj2->GetPosition(), size); }
 
        virtual void CleanupsBeforeDelete(bool finalCleanup = true);  // used in destructor or explicitly before mass creature delete to remove cross-references to already deleted units
 
        virtual void SendMessageToSet(WorldPacket const* data, bool self) const;
        virtual void SendMessageToSetInRange(WorldPacket const* data, float dist, bool self) const;
        virtual void SendMessageToSet(WorldPacket const* data, Player const* skipped_rcvr) const;
 
        virtual uint8 GetLevelForTarget(WorldObject const* /*target*/) const { return 1; }
 
        void PlayDistanceSound(uint32 soundId, Player* target = nullptr);
        void PlayDirectSound(uint32 soundId, Player* target = nullptr);
        void PlayDirectMusic(uint32 musicId, Player* target = nullptr);
 
        void SendObjectDeSpawnAnim(ObjectGuid guid);
 
        void AddObjectToRemoveList();
 
        float GetGridActivationRange() const;
        float GetVisibilityRange() const;
        float GetSightRange(WorldObject const* target = nullptr) const;
        bool CanSeeOrDetect(WorldObject const* obj, bool implicitDetect = false, bool distanceCheck = false, bool checkAlert = false) const;
 
        FlaggedValuesArray32<int32, uint32, StealthType, TOTAL_STEALTH_TYPES> m_stealth;
        FlaggedValuesArray32<int32, uint32, StealthType, TOTAL_STEALTH_TYPES> m_stealthDetect;
 
        FlaggedValuesArray32<int32, uint32, InvisibilityType, TOTAL_INVISIBILITY_TYPES> m_invisibility;
        FlaggedValuesArray32<int32, uint32, InvisibilityType, TOTAL_INVISIBILITY_TYPES> m_invisibilityDetect;
 
        FlaggedValuesArray32<int32, uint32, ServerSideVisibilityType, TOTAL_SERVERSIDE_VISIBILITY_TYPES> m_serverSideVisibility;
        FlaggedValuesArray32<int32, uint32, ServerSideVisibilityType, TOTAL_SERVERSIDE_VISIBILITY_TYPES> m_serverSideVisibilityDetect;
 
        virtual void SetMap(Map* map);
        virtual void ResetMap();
        Map* GetMap() const { ASSERT(m_currMap); return m_currMap; }
        Map* FindMap() const { return m_currMap; }
        //used to check all object's GetMap() calls when object is not in world!
 
        void SetZoneScript();
        void ClearZoneScript();
        ZoneScript* GetZoneScript() const { return m_zoneScript; }
 
        TempSummon* SummonCreature(uint32 entry, Position const& pos, TempSummonType despawnType = TEMPSUMMON_MANUAL_DESPAWN, Milliseconds despawnTime = 0s, uint32 vehId = 0, uint32 spellId = 0, ObjectGuid privateObjectOwner = ObjectGuid::Empty);
        TempSummon* SummonCreature(uint32 entry, float x, float y, float z, float o = 0, TempSummonType despawnType = TEMPSUMMON_MANUAL_DESPAWN, Milliseconds despawnTime = 0s, ObjectGuid privateObjectOwner = ObjectGuid::Empty);
        GameObject* SummonGameObject(uint32 entry, Position const& pos, QuaternionData const& rot, Seconds respawnTime, GOSummonType summonType = GO_SUMMON_TIMED_OR_CORPSE_DESPAWN);
        GameObject* SummonGameObject(uint32 entry, float x, float y, float z, float ang, QuaternionData const& rot, Seconds respawnTime, GOSummonType summonType = GO_SUMMON_TIMED_OR_CORPSE_DESPAWN);
        Creature*   SummonTrigger(float x, float y, float z, float ang, Milliseconds despawnTime, CreatureAI* (*GetAI)(Creature*) = nullptr);
        void SummonCreatureGroup(uint8 group, std::list<TempSummon*>* list = nullptr);
 
        Creature*   FindNearestCreature(uint32 entry, float range, bool alive = true) const;
        Creature*   FindNearestCreatureWithOptions(float range, FindCreatureOptions const& options) const;
        GameObject* FindNearestGameObject(uint32 entry, float range, bool spawnedOnly = true) const;
        GameObject* FindNearestGameObjectWithOptions(float range, FindGameObjectOptions const& options) const;
        GameObject* FindNearestUnspawnedGameObject(uint32 entry, float range) const;
        GameObject* FindNearestGameObjectOfType(GameobjectTypes type, float range) const;
        Player* SelectNearestPlayer(float distance) const;
 
        virtual ObjectGuid GetOwnerGUID() const = 0;
        virtual ObjectGuid GetCharmerOrOwnerGUID() const { return GetOwnerGUID(); }
        ObjectGuid GetCharmerOrOwnerOrOwnGUID() const;
 
        Unit* GetOwner() const;
        Unit* GetCharmerOrOwner() const;
        Unit* GetCharmerOrOwnerOrSelf() const;
        Player* GetCharmerOrOwnerPlayerOrPlayerItself() const;
        Player* GetAffectingPlayer() const;
 
        Player* GetSpellModOwner() const;
        int32 CalculateSpellDamage(SpellEffectInfo const& spellEffectInfo, int32 const* basePoints = nullptr) const;
 
        // target dependent range checks
        float GetSpellMaxRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const;
        float GetSpellMinRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const;
 
        float ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, float value) const;
        int32 CalcSpellDuration(SpellInfo const* spellInfo) const;
        int32 ModSpellDuration(SpellInfo const* spellInfo, WorldObject const* target, int32 duration, bool positive, uint32 effectMask) const;
        void ModSpellCastTime(SpellInfo const* spellInfo, int32& castTime, Spell* spell = nullptr) const;
        void ModSpellDurationTime(SpellInfo const* spellInfo, int32& durationTime, Spell* spell = nullptr) const;
 
        virtual float MeleeSpellMissChance(Unit const* victim, WeaponAttackType attType, int32 skillDiff, uint32 spellId) const;
        virtual SpellMissInfo MeleeSpellHitResult(Unit* victim, SpellInfo const* spellInfo) const;
        SpellMissInfo MagicSpellHitResult(Unit* victim, SpellInfo const* spellInfo) const;
        SpellMissInfo SpellHitResult(Unit* victim, SpellInfo const* spellInfo, bool canReflect = false) const;
        void SendSpellMiss(Unit* target, uint32 spellID, SpellMissInfo missInfo);
 
        virtual uint32 GetFaction() const = 0;
        virtual void SetFaction(uint32 /*faction*/) { }
        FactionTemplateEntry const* GetFactionTemplateEntry() const;
 
        ReputationRank GetReactionTo(WorldObject const* target) const;
        static ReputationRank GetFactionReactionTo(FactionTemplateEntry const* factionTemplateEntry, WorldObject const* target);
 
        bool IsHostileTo(WorldObject const* target) const;
        bool IsHostileToPlayers() const;
        bool IsFriendlyTo(WorldObject const* target) const;
        bool IsNeutralToAll() const;
 
        // CastSpell's third arg can be a variety of things - check out CastSpellExtraArgs' constructors!
        SpellCastResult CastSpell(CastSpellTargetArg const& targets, uint32 spellId, CastSpellExtraArgs const& args = { });
 
        bool IsValidAttackTarget(WorldObject const* target, SpellInfo const* bySpell = nullptr) const;
        bool IsValidAssistTarget(WorldObject const* target, SpellInfo const* bySpell = nullptr) const;
 
        Unit* GetMagicHitRedirectTarget(Unit* victim, SpellInfo const* spellInfo);
 
        template <typename Container>
        void GetGameObjectListWithEntryInGrid(Container& gameObjectContainer, uint32 entry, float maxSearchRange = 250.0f) const;
 
        template <typename Container>
        void GetGameObjectListWithOptionsInGrid(Container& gameObjectContainer, float maxSearchRange, FindGameObjectOptions const& options) const;
 
        template <typename Container>
        void GetCreatureListWithEntryInGrid(Container& creatureContainer, uint32 entry, float maxSearchRange = 250.0f) const;
 
        template <typename Container>
        void GetCreatureListWithOptionsInGrid(Container& creatureContainer, float maxSearchRange, FindCreatureOptions const& options) const;
 
        template <typename Container>
        void GetPlayerListInGrid(Container& playerContainer, float maxSearchRange, bool alive = true) const;
 
        void DestroyForNearbyPlayers();
        virtual void UpdateObjectVisibility(bool forced = true);
        virtual void UpdateObjectVisibilityOnCreate() { UpdateObjectVisibility(true); }
        void UpdatePositionData();
 
        void BuildUpdate(UpdateDataMapType&) override;
        bool AddToObjectUpdate() override;
        void RemoveFromObjectUpdate() override;
 
        //relocation and visibility system functions
        void AddToNotify(uint16 f) { m_notifyflags |= f;}
        bool isNeedNotify(uint16 f) const { return (m_notifyflags & f) != 0; }
        uint16 GetNotifyFlags() const { return m_notifyflags; }
        void ResetAllNotifies() { m_notifyflags = 0; }
 
        bool isActiveObject() const { return m_isActive; }
        void setActive(bool isActiveObject);
        bool IsFarVisible() const { return m_isFarVisible; }
        void SetFarVisible(bool on);
        bool IsVisibilityOverridden() const { return m_visibilityDistanceOverride.has_value(); }
        void SetVisibilityDistanceOverride(VisibilityDistanceType type);
        void SetIsStoredInWorldObjectGridContainer(bool apply);
        bool IsAlwaysStoredInWorldObjectGridContainer() const { return m_isStoredInWorldObjectGridContainer; }
        bool IsStoredInWorldObjectGridContainer() const;
 
        uint32  LastUsedScriptID;
 
        // Transports
        Transport* GetTransport() const { return m_transport; }
        float GetTransOffsetX() const { return m_movementInfo.transport.pos.GetPositionX(); }
        float GetTransOffsetY() const { return m_movementInfo.transport.pos.GetPositionY(); }
        float GetTransOffsetZ() const { return m_movementInfo.transport.pos.GetPositionZ(); }
        float GetTransOffsetO() const { return m_movementInfo.transport.pos.GetOrientation(); }
        Position const& GetTransOffset() const { return m_movementInfo.transport.pos; }
        uint32 GetTransTime()   const { return m_movementInfo.transport.time; }
        int8 GetTransSeat()     const { return m_movementInfo.transport.seat; }
        virtual ObjectGuid GetTransGUID() const;
        void SetTransport(Transport* t) { m_transport = t; }
 
        MovementInfo m_movementInfo;
 
        virtual float GetStationaryX() const { return GetPositionX(); }
        virtual float GetStationaryY() const { return GetPositionY(); }
        virtual float GetStationaryZ() const { return GetPositionZ(); }
        virtual float GetStationaryO() const { return GetOrientation(); }
 
        float GetFloorZ() const;
        virtual float GetCollisionHeight() const { return 0.0f; }
 
        float GetMapWaterOrGroundLevel(float x, float y, float z, float* ground = nullptr) const;
        float GetMapHeight(float x, float y, float z, bool vmap = true, float distanceToSearch = 50.0f) const; // DEFAULT_HEIGHT_SEARCH in map.h
 
        std::string GetDebugInfo() const override;
 
        // Event handler
        EventProcessor m_Events;
 
        // Watcher
        bool IsPrivateObject() const { return !_privateObjectOwner.IsEmpty(); }
        ObjectGuid GetPrivateObjectOwner() const { return _privateObjectOwner; }
        void SetPrivateObjectOwner(ObjectGuid const& owner) { _privateObjectOwner = owner; }
        bool CheckPrivateObjectOwnerVisibility(WorldObject const* seer) const;
 
    protected:
        std::string m_name;
        bool m_isActive;
        bool m_isFarVisible;
        Optional<float> m_visibilityDistanceOverride;
        bool const m_isStoredInWorldObjectGridContainer;
        ZoneScript* m_zoneScript;
 
        // transports
        Transport* m_transport;
 
        virtual void ProcessPositionDataChanged(PositionFullTerrainStatus const& data);
        uint32 m_zoneId;
        uint32 m_areaId;
        float m_staticFloorZ;
        bool m_outdoors;
        ZLiquidStatus m_liquidStatus;
 
        //these functions are used mostly for Relocate() and Corpse/Player specific stuff...
        //use them ONLY in LoadFromDB()/Create() funcs and nowhere else!
        //mapId/instanceId should be set in SetMap() function!
        void SetLocationMapId(uint32 _mapId) { m_mapId = _mapId; }
        void SetLocationInstanceId(uint32 _instanceId) { m_InstanceId = _instanceId; }
 
        virtual bool IsNeverVisible([[maybe_unused]] bool allowServersideObjects) const { return !IsInWorld(); }
        virtual bool IsAlwaysVisibleFor(WorldObject const* /*seer*/) const { return false; }
        virtual bool IsInvisibleDueToDespawn() const { return false; }
        //difference from IsAlwaysVisibleFor: 1. after distance check; 2. use owner or charmer as seer
        virtual bool IsAlwaysDetectableFor(WorldObject const* /*seer*/) const { return false; }
 
        virtual void Heartbeat() { }
    private:
        Map* m_currMap;                                   // current object's Map location
 
        uint32 m_InstanceId;                              // in map copy with instance id
        uint32 m_phaseMask;                               // in area phase state
 
        uint16 m_notifyflags;
 
        ObjectGuid _privateObjectOwner;
 
        Milliseconds _heartbeatTimer;
 
        virtual bool _IsWithinDist(WorldObject const* obj, float dist2compare, bool is3D, bool incOwnRadius = true, bool incTargetRadius = true) const;
 
        bool CanNeverSee(WorldObject const* obj) const;
        virtual bool CanAlwaysSee(WorldObject const* /*obj*/) const { return false; }
        bool CanDetect(WorldObject const* obj, bool ignoreStealth, bool checkAlert = false) const;
        bool CanDetectInvisibilityOf(WorldObject const* obj) const;
        bool CanDetectStealthOf(WorldObject const* obj, bool checkAlert = false) const;
};
 
namespace Trinity
{
    // Binary predicate to sort WorldObjects based on the distance to a reference WorldObject
    class ObjectDistanceOrderPred
    {
        public:
            ObjectDistanceOrderPred(WorldObject const* refObj, bool ascending = true) : _refObj(refObj), _ascending(ascending) { }
 
            bool operator()(WorldObject const* left, WorldObject const* right) const
            {
                return _refObj->GetDistanceOrder(left, right) == _ascending;
            }
 
        private:
            WorldObject const* _refObj;
            bool _ascending;
    };
}
 
#endif