Fix #2872: Add ability to restream LOD models (PR #2873)

Author: TFP-dev

Client/game_sa/CStreamingSA.cpp

@@ -306,3 +306,8 @@ std::uint32_t CStreamingSA::GetMemoryUsed() const
 {
     return *reinterpret_cast<std::uint32_t*>(0x8E4CB4);
 }
+
+void CStreamingSA::RemoveBigBuildings()
+{
+    (reinterpret_cast<void(__cdecl*)()>(0x4093B0))();
+}

Client/game_sa/CStreamingSA.h

@@ -57,6 +57,7 @@ class CStreamingSA final : public CStreaming
     bool HasModelLoaded(DWORD dwModelID);
     void RequestSpecialModel(DWORD model, const char* szTexture, DWORD channel);
     void ReinitStreaming();
+    void RemoveBigBuildings() override;
 
     CStreamingInfo* GetStreamingInfo(uint32 id);
     void            SetStreamingInfo(uint32 modelid, unsigned char usStreamID, uint uiOffset, ushort usSize, uint uiNextInImg = -1);

Client/mods/deathmatch/logic/CClientGame.cpp

@@ -5424,7 +5424,7 @@ void CClientGame::ResetMapInfo()
     if (pPlayerInfo)
         pPlayerInfo->SetCamDrunkLevel(static_cast<byte>(0));
 
-    RestreamWorld();
+    RestreamWorld(true);
 }
 
 void CClientGame::SendPedWastedPacket(CClientPed* Ped, ElementID damagerID, unsigned char ucWeapon, unsigned char ucBodyPiece, AssocGroupId animGroup,
@@ -6546,7 +6546,7 @@ void CClientGame::RestreamModel(unsigned short usModel)
         m_pManager->GetVehicleManager()->RestreamVehicleUpgrades(usModel);
 }
 
-void CClientGame::RestreamWorld()
+void CClientGame::RestreamWorld(bool removeBigBuildings)
 {
     unsigned int numberOfFileIDs = g_pGame->GetCountOfAllFileIDs();
 
@@ -6559,6 +6559,9 @@ void CClientGame::RestreamWorld()
     m_pManager->GetPedManager()->RestreamAllPeds();
     m_pManager->GetPickupManager()->RestreamAllPickups();
 
+    if (removeBigBuildings)
+        g_pGame->GetStreaming()->RemoveBigBuildings();
+
     g_pGame->GetStreaming()->ReinitStreaming();
 }
 

Client/mods/deathmatch/logic/CClientGame.h

@@ -439,7 +439,7 @@ class CClientGame
 
     bool TriggerBrowserRequestResultEvent(const std::unordered_set<SString>& newPages);
     void RestreamModel(unsigned short usModel);
-    void RestreamWorld();
+    void RestreamWorld(bool removeBigBuildings);
 
     void OnWindowFocusChange(bool state);
 

Client/mods/deathmatch/logic/CClientIMG.cpp

@@ -185,7 +185,7 @@ bool CClientIMG::StreamDisable()
 
     m_pImgManager->UpdateStreamerBufferSize();
 
-    g_pClientGame->RestreamWorld();
+    g_pClientGame->RestreamWorld(true);
     return true;
 }
 

Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp

@@ -2311,8 +2311,13 @@ bool CLuaEngineDefs::EngineResetModelFlags(uint uiModelID)
     return false;
 }
 
-bool CLuaEngineDefs::EngineRestreamWorld()
+bool CLuaEngineDefs::EngineRestreamWorld(lua_State* const luaVM)
 {
-    g_pClientGame->RestreamWorld();
+    bool restreamLODs{};
+
+    CScriptArgReader argStream(luaVM);
+    argStream.ReadBool(restreamLODs, false);
+
+    g_pClientGame->RestreamWorld(restreamLODs);
     return true;
 }

Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.h

@@ -74,7 +74,7 @@ class CLuaEngineDefs : public CLuaDefs
     static bool                                            EngineRestoreTXDImage(uint uiModelID);
     static std::vector<std::string_view>                   EngineImageGetFileList(CClientIMG* pImg);
     static std::string                                     EngineImageGetFile(CClientIMG* pImg, std::variant<size_t, std::string_view> file);
-    static bool                                            EngineRestreamWorld();
+    static bool                                            EngineRestreamWorld(lua_State* const luaVM);
     static bool                                            EngineSetModelVisibleTime(std::string strModelId, char cHourOn, char cHourOff);
     static std::variant<bool, CLuaMultiReturn<char, char>> EngineGetModelVisibleTime(std::string strModelId);
 

Client/sdk/game/CStreaming.h

@@ -43,4 +43,5 @@ class CStreaming
     virtual uint32 GetStreamingBufferSize() = 0;
     virtual void   MakeSpaceFor(std::uint32_t memoryToCleanInBytes) = 0;
     virtual std::uint32_t GetMemoryUsed() const = 0;
+    virtual void            RemoveBigBuildings() = 0;
 };