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107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
#pragma once
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#include <Events/EventDispatcher.h>
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#include <Games/Events.h>
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#include <Structs/GridCellCoords.h>
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struct World;
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struct ConnectedEvent;
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struct GameService;
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struct PreUpdateEvent;
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struct ActorSpawnedEvent;
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struct TESObjectREFR;
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struct TESWorldSpace;
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/**
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* Responsible for discovering loaded actors, dispatching cell changes,
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* and notifying the rest of the client about newly discovered actors.
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*/
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struct DiscoveryService final : BSTEventSink<TESLoadGameEvent>
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{
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DiscoveryService(World& aWorld, entt::dispatcher& aDispatcher) noexcept;
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~DiscoveryService() noexcept = default;
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TP_NOCOPYMOVE(DiscoveryService);
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protected:
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/**
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* Checks whether the cell has changed, and if so,
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* notify the client about the new location.
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* @param aForceTrigger Forcefully notify the client about the current location
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*/
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void VisitCell(bool aForceTrigger = false) noexcept;
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/**
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* Checks whether the grid cell has shifted, and if so,
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* notify the client about the newly loaded cells.
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* @param aWorldSpace The world space that the grid cell is in.
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* @param aNewCellGrid True if the player just walked into the new world space.
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*/
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void DetectGridCellChange(TESWorldSpace* aWorldSpace, bool aNewCellGrid) noexcept;
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/**
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* @brief Dispatches (un)loaded actors.
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*/
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void VisitForms() noexcept;
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/**
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* On each update, check whether the actor list or locational data has changed.
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* @param acPreUpdateEvent Update on PreUpdateEvent so that the actors are dispatched before anything else.
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*/
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void OnUpdate(const PreUpdateEvent& acPreUpdateEvent) noexcept;
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/**
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* On connect, forcefully dispatch the loaded actors and locational data.
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*/
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void OnConnected(const ConnectedEvent& acEvent) noexcept;
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/**
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* When the game finishes loading, forcefully dispatch the loaded actors and locational data.
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* This is a fix for the event that the player dies, and needs to rebroadcast its data.
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* TODO(cosideci): this system is incomplete.
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*/
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BSTEventResult OnEvent(const TESLoadGameEvent*, const EventDispatcher<TESLoadGameEvent>*) override;
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private:
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/**
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* Resets cached exterior cell data.
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* TODO(cosideci): confirm the usage of this function
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*/
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void ResetCachedCellData() noexcept;
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/**
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* Checks whether the exterior cell grid has changed, and if so,
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* notify the client about the new location.
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* @param aForceTrigger Forcefully notify the client about the current location
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*/
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void VisitExteriorCell(bool aForceTrigger) noexcept;
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/**
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* Checks whether the interior cell has changed, and if so,
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* notify the client about the new location.
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* @param aForceTrigger Forcefully notify the client about the current location
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*/
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void VisitInteriorCell(bool aForceTrigger) noexcept;
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World& m_world;
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entt::dispatcher& m_dispatcher;
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//! @brief Cached actor forms detected in the previous frame.
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Set<uint32_t> m_forms;
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/**
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* The center grid coordinates are the coordinates of the cell in the cell grid
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* where the cells around it in a 5 by 5 grid (by default) are loaded.
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*/
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GridCellCoords m_centerGrid{};
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/**
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* The current grid coordinates are the coordinates of the cell that is currently
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* actually occupied by the player.
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*/
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GridCellCoords m_currentGrid{};
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uint32_t m_worldSpaceId = 0;
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uint32_t m_interiorCellId = 0;
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struct TESForm* m_pLocation = nullptr;
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entt::scoped_connection m_preUpdateConnection;
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entt::scoped_connection m_connectedConnection;
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};
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