Add ability to replace clump model with atomic and vice-versa

Client/game_sa/CFileLoaderSA.cpp

@@ -12,6 +12,7 @@
 #include "gamesa_renderware.h"
 #include "CFileLoaderSA.h"
 #include "CModelInfoSA.h"
+#include "CRenderWareSA.h"
 
 CFileLoaderSA::CFileLoaderSA()
 {
@@ -48,53 +49,6 @@ class CDamagableModelInfo
     void CDamagableModelInfo::SetDamagedAtomic(RpAtomic* atomic) { ((void(__thiscall*)(CDamagableModelInfo*, RpAtomic*))0x4C48D0)(this, atomic); }
 };
 
-static char* GetFrameNodeName(RwFrame* frame)
-{
-    return ((char*(__cdecl*)(RwFrame*))0x72FB30)(frame);
-}
-
-// Originally there was a possibility for this function to cause buffer overflow
-// It should be fixed here.
-template <size_t OutBuffSize>
-void GetNameAndDamage(const char* nodeName, char (&outName)[OutBuffSize], bool& outDamage)
-{
-    const auto nodeNameLen = strlen(nodeName);
-
-    const auto NodeNameEndsWith = [=](const char* with) {
-        const auto withLen = strlen(with);
-        // dassert(withLen <= nodeNameLen);
-        return withLen <= nodeNameLen /*dont bother checking otherwise, because it might cause a crash*/
-               && strncmp(nodeName + nodeNameLen - withLen, with, withLen) == 0;
-    };
-
-    // Copy `nodeName` into `outName` with `off` trimmed from the end
-    // Eg.: `dmg_dam` with `off = 4` becomes `dmg`
-    const auto TerminatedCopy = [&](size_t off) {
-        dassert(nodeNameLen - off < OutBuffSize);
-        strncpy_s(outName, nodeName,
-                  std::min(nodeNameLen - off, OutBuffSize - 1));            // By providing `OutBuffSize - 1` it is ensured the array will be null terminated
-    };
-
-    if (NodeNameEndsWith("_dam"))
-    {
-        outDamage = true;
-        TerminatedCopy(sizeof("_dam") - 1);
-    }
-    else
-    {
-        outDamage = false;
-        if (NodeNameEndsWith("_l0") || NodeNameEndsWith("_L0"))
-        {
-            TerminatedCopy(sizeof("_l0") - 1);
-        }
-        else
-        {
-            dassert(nodeNameLen < OutBuffSize);
-            strncpy_s(outName, OutBuffSize, nodeName, OutBuffSize - 1);
-        }
-    }
-}
-
 static void CVisibilityPlugins_SetAtomicRenderCallback(RpAtomic* pRpAtomic, RpAtomic* (*renderCB)(RpAtomic*))
 {
     return ((void(__cdecl*)(RpAtomic*, RpAtomic * (*renderCB)(RpAtomic*)))0x7328A0)(pRpAtomic, renderCB);
@@ -170,9 +124,9 @@ RpAtomic* CFileLoader_SetRelatedModelInfoCB(RpAtomic* atomic, SRelatedModelInfo*
     CBaseModelInfoSAInterface* pBaseModelInfo = CModelInfo_ms_modelInfoPtrs[gAtomicModelId];
     auto                       pAtomicModelInfo = reinterpret_cast<CAtomicModelInfo*>(pBaseModelInfo);
     RwFrame*                   pOldFrame = reinterpret_cast<RwFrame*>(atomic->object.object.parent);
-    char*                      frameNodeName = GetFrameNodeName(pOldFrame);
+    char*                      frameNodeName = CRenderWareSA::GetFrameNodeName(pOldFrame);
     bool                       bDamage = false;
-    GetNameAndDamage(frameNodeName, name, bDamage);
+    CRenderWareSA::GetNameAndDamage(frameNodeName, name, bDamage);
     CVisibilityPlugins_SetAtomicRenderCallback(atomic, 0);
 
     RpAtomic* pOldAtomic = reinterpret_cast<RpAtomic*>(pBaseModelInfo->pRwObject);

Client/game_sa/CModelInfoSA.cpp

@@ -35,6 +35,7 @@ std::map<CTimeInfoSAInterface*, CTimeInfoSAInterface*>                CModelInfo
 std::unordered_map<DWORD, unsigned short>                             CModelInfoSA::ms_OriginalObjectPropertiesGroups;
 std::unordered_map<DWORD, std::pair<float, float>>                    CModelInfoSA::ms_VehicleModelDefaultWheelSizes;
 std::map<unsigned short, int>                                         CModelInfoSA::ms_DefaultTxdIDMap;
+std::unordered_map<std::uint32_t, CBaseModelInfoSAInterface*>         CModelInfoSA::m_convertedModelInterfaces;
 
 union tIdeFlags
 {
@@ -1512,6 +1513,7 @@ bool CModelInfoSA::SetCustomModel(RpClump* pClump)
         case eModelInfoType::ATOMIC:
         case eModelInfoType::LOD_ATOMIC:
         case eModelInfoType::TIME:
+        case eModelInfoType::CLUMP:
             success = pGame->GetRenderWare()->ReplaceAllAtomicsInModel(pClump, static_cast<unsigned short>(m_dwModelID));
             break;
         default:
@@ -1530,6 +1532,21 @@ void CModelInfoSA::RestoreOriginalModel()
         pGame->GetStreaming()->RemoveModel(m_dwModelID);
     }
 
+    // Restore original interface if model was converted
+    if (MapContains(m_convertedModelInterfaces, m_dwModelID))
+    {
+        CBaseModelInfoSAInterface* currentInterface = ppModelInfo[m_dwModelID];
+        ppModelInfo[m_dwModelID] = MapGet(m_convertedModelInterfaces, m_dwModelID);
+
+        if (currentInterface)
+        {
+            ppModelInfo[m_dwModelID]->usNumberOfRefs = currentInterface->usNumberOfRefs;
+            delete currentInterface;
+        }
+
+        MapRemove(m_convertedModelInterfaces, m_dwModelID);
+    }
+
     // Reset the stored custom vehicle clump
     m_pCustomClump = NULL;
 }
@@ -1799,6 +1816,67 @@ void CModelInfoSA::MakeClumpModel(ushort usBaseID)
     CopyStreamingInfoFromModel(usBaseID);
 }
 
+bool CModelInfoSA::ConvertToClump()
+{
+    // Get current interface
+    CBaseModelInfoSAInterface* currentModelInterface = ppModelInfo[m_dwModelID];
+    if (!currentModelInterface)
+        return false;
+
+    // Create new clump interface
+    CClumpModelInfoSAInterface* newClumpInterface = new CClumpModelInfoSAInterface();
+    MemCpyFast(newClumpInterface, currentModelInterface, sizeof(CBaseModelInfoSAInterface));
+    newClumpInterface->m_nAnimFileIndex = -1;
+
+    // (FileEX): We do not destroy or set pRwObject to nullptr here
+    // because our IsLoaded code expects the RwObject to exist.
+    // We destroy the old RwObject in CRenderWareSA::ReplaceAllAtomicsInModel after passing the IsLoaded condition in the SetCustomModel.
+
+    // Set CClumpModelInfo vtbl after copying data
+    newClumpInterface->VFTBL = reinterpret_cast<CBaseModelInfo_SA_VTBL*>(VTBL_CClumpModelInfo);
+
+    // Set new interface for ModelInfo
+    ppModelInfo[m_dwModelID] = newClumpInterface;
+
+    // Store original interface
+    MapSet(m_convertedModelInterfaces, m_dwModelID, currentModelInterface);
+    return true;
+}
+
+bool CModelInfoSA::ConvertToAtomic()
+{
+    // Get current interface
+    CClumpModelInfoSAInterface* currentClumpInterface = static_cast<CClumpModelInfoSAInterface*>(ppModelInfo[m_dwModelID]);
+    if (!currentClumpInterface)
+        return false;
+
+    // Create new atomic interface
+    CAtomicModelInfoSAInterface* newAtomicInterface = new CAtomicModelInfoSAInterface();
+    MemCpyFast(newAtomicInterface, currentClumpInterface, sizeof(CAtomicModelInfoSAInterface));
+
+    // (FileEX): We do not destroy or set pRwObject to nullptr here
+    // because our IsLoaded code expects the RwObject to exist.
+    // We destroy the old RwObject in CRenderWareSA::ReplaceAllAtomicsInModel after passing the IsLoaded condition in the SetCustomModel.
+
+    // Set CAtomicModelInfo vtbl after copying data
+    newAtomicInterface->VFTBL = reinterpret_cast<CBaseModelInfo_SA_VTBL*>(VTBL_CAtomicModelInfo);
+
+    // Set new interface for ModelInfo
+    ppModelInfo[m_dwModelID] = newAtomicInterface;
+
+    // Store original interface
+    MapSet(m_convertedModelInterfaces, m_dwModelID, currentClumpInterface);
+    return true;
+}
+
+CBaseModelInfoSAInterface* CModelInfoSA::GetOriginalInterface() const
+{
+    if (!MapContains(m_convertedModelInterfaces, m_dwModelID))
+        return nullptr;
+
+    return MapGet(m_convertedModelInterfaces, m_dwModelID);
+}
+
 void CModelInfoSA::MakeVehicleAutomobile(ushort usBaseID)
 {
     CVehicleModelInfoSAInterface* m_pInterface = new CVehicleModelInfoSAInterface();

Client/game_sa/CModelInfoSA.h

@@ -64,6 +64,9 @@ static void* ARRAY_ModelInfo = *(void**)(0x403DA4 + 3);
 
 #define     VAR_CTempColModels_ModelPed1    0x968DF0
 
+#define VTBL_CClumpModelInfo 0x85BD30
+#define VTBL_CAtomicModelInfo 0x85BBF0
+
 class CBaseModelInfoSAInterface;
 class CModelInfoSAInterface
 {
@@ -252,9 +255,19 @@ class CClumpModelInfoSAInterface : public CBaseModelInfoSAInterface
         char*    m_animFileName;
         uint32_t m_nAnimFileIndex;
     };
+
+    void DeleteRwObject() { ((void(__thiscall*)(CClumpModelInfoSAInterface*))0x4C4E70)(this); }
+    void SetClump(RpClump* clump) { ((void(__thiscall*)(CClumpModelInfoSAInterface*, RpClump*))0x4C4F70)(this, clump); }
 };
 
-class CTimeModelInfoSAInterface : public CBaseModelInfoSAInterface
+class CAtomicModelInfoSAInterface : public CBaseModelInfoSAInterface
+{
+public:
+    void DeleteRwObject() { ((void(__thiscall*)(CAtomicModelInfoSAInterface*))0x4C4440)(this); }
+    void SetAtomic(RpAtomic* atomic) { ((void(__thiscall*)(CAtomicModelInfoSAInterface*, RpAtomic*))0x4C4360)(this, atomic); }
+};
+
+class CTimeModelInfoSAInterface : public CAtomicModelInfoSAInterface
 {
 public:
     CTimeInfoSAInterface timeInfo;
@@ -268,10 +281,12 @@ class CVehicleModelUpgradePosnDesc
 };
 static_assert(sizeof(CVehicleModelUpgradePosnDesc) == 0x20, "Invalid size of CVehicleModelUpgradePosnDesc class");
 
-class CDamageableModelInfoSAInterface : public CBaseModelInfoSAInterface
+class CDamageableModelInfoSAInterface : public CAtomicModelInfoSAInterface
 {
 public:
-    void* m_damagedAtomic;
+    RpAtomic* m_damagedAtomic;
+
+    void SetDamagedAtomic(RpAtomic* atomic) { ((void(__thiscall*)(RpAtomic*))FUNC_CAtomicModelInfo_SetAtomic)(atomic); }
 };
 
 class CVehicleModelVisualInfoSAInterface            // Not sure about this name. If somebody knows more, please change
@@ -356,6 +371,9 @@ class CModelInfoSA : public CModelInfo
     static std::map<unsigned short, int>                                         ms_DefaultTxdIDMap;
     SVehicleSupportedUpgrades                                                    m_ModelSupportedUpgrades;
 
+    // Store original model interfaces after conersion clump->atomic or atomic->clump
+    static std::unordered_map<std::uint32_t, CBaseModelInfoSAInterface*> m_convertedModelInterfaces;
+
 public:
     CModelInfoSA();
 
@@ -489,6 +507,11 @@ class CModelInfoSA : public CModelInfo
     void           RestoreObjectPropertiesGroup();
     static void    RestoreAllObjectsPropertiesGroups();
 
+    // Model type conversion functions
+    bool ConvertToClump();
+    bool ConvertToAtomic();
+    CBaseModelInfoSAInterface* GetOriginalInterface() const;
+
     // Vehicle towing functions
     bool IsTowableBy(CModelInfo* towingModel) override;