Add basic knife changer through NetVar proxy function.

Chameleon/Chameleon.cpp

@@ -4,14 +4,32 @@
 // Include the user defined skins.
 #include "Skins.h"
 
-// Define global pointers to game classes.
-IVEngineClient* g_EngineClient = nullptr;
-IClientEntityList* g_EntityList = nullptr;
-
 // Define the calling convention for the FrameStageNotify function.
 typedef void(__thiscall *FrameStageNotify)(void*, ClientFrameStage_t);
 FrameStageNotify fnOriginalFunction = NULL;
 
+// Store the original proxy function for the 'm_nModelIndex' property.
+RecvVarProxyFn fnOriginalProxyFn = NULL;
+
+// Function to change viewmodels.
+void SetViewModelIndex(const CRecvProxyData *pDataConst, void *pStruct, void *pOut) {
+	// Ensure the model replacements are available. (called here so GetModelIndex returns valid IDs)
+	if (g_ViewModelCfg.size() == 0)
+		SetModelConfig();
+
+	// Make the incoming data editable.
+	CRecvProxyData* pData = const_cast<CRecvProxyData*>(pDataConst);
+
+	// Check for a model replacement in the global table.
+	if (g_ViewModelCfg.find(pData->m_Value.m_Int) != g_ViewModelCfg.end()) {
+		// Replace the view model with the user defined value.
+		pData->m_Value.m_Int = g_ViewModelCfg[pData->m_Value.m_Int];
+	}
+
+	// Call original function with the modified data.
+	fnOriginalProxyFn(pData, pStruct, pOut);
+}
+
 // Function to apply skin data to weapons.
 inline bool ApplyCustomSkin(CBaseAttributableItem* pWeapon) {
 	// Get the weapons item definition index.
@@ -28,6 +46,9 @@ inline bool ApplyCustomSkin(CBaseAttributableItem* pWeapon) {
 	*pWeapon->GetFallbackStatTrak() = g_SkinChangerCfg[nWeaponIndex].nFallbackStatTrak;
 	*pWeapon->GetFallbackWear() = g_SkinChangerCfg[nWeaponIndex].flFallbackWear;
 
+	if (g_SkinChangerCfg[nWeaponIndex].iItemDefinitionIndex)
+		*pWeapon->GetItemDefinitionIndex() = g_SkinChangerCfg[nWeaponIndex].iItemDefinitionIndex;
+
 	// If a name is defined, write it now.
 	if (g_SkinChangerCfg[nWeaponIndex].szCustomName) {
 		sprintf_s(pWeapon->GetCustomName(), 32, "%s", g_SkinChangerCfg[nWeaponIndex].szCustomName);
@@ -89,15 +110,14 @@ void Initialise() {
 	CreateInterfaceFn fnClientFactory = (CreateInterfaceFn)GetProcAddress(GetModuleHandleA("client.dll"), "CreateInterface");
 	CreateInterfaceFn fnEngineFactory = (CreateInterfaceFn)GetProcAddress(GetModuleHandleA("engine.dll"), "CreateInterface");
 
-	// Call "CreateInterface" to get the IBaseClientDLL, IClientEntityList and IVEngineClient classes.
+	// Call "CreateInterface" to get the required class pointers.
+	g_BaseClient = (IBaseClientDLL*)fnClientFactory("VClient017", NULL); 
 	g_EntityList = (IClientEntityList*)fnClientFactory("VClientEntityList003", NULL);
 	g_EngineClient = (IVEngineClient*)fnEngineFactory("VEngineClient013", NULL);
-
-	// We don't implement IBaseClientDLL so we won't cast it.
-	void* pClientDLL = fnClientFactory("VClient017", NULL);
-
+	g_ModelInfo = (IVModelInfoClient*)fnEngineFactory("VModelInfoClient004", NULL);
+
 	// Get the virtual method table for IBaseClientDLL.
-	PDWORD* pClientDLLVMT = (PDWORD*)pClientDLL;
+	PDWORD* pClientDLLVMT = (PDWORD*)g_BaseClient;
 
 	// Save the untouched table so we know where the original functions are.
 	PDWORD pOriginalClientDLLVMT = *pClientDLLVMT;
@@ -125,6 +145,31 @@ void Initialise() {
 
 	// Import skins to use.
 	SetSkinConfig();
+
+	// Search for the 'CBaseViewModel' class.
+	for (ClientClass* pClass = g_BaseClient->GetAllClasses(); pClass; pClass = pClass->m_pNext) {
+		if (!strcmp(pClass->m_pNetworkName, "CBaseViewModel")) {
+			// Search for the 'm_nModelIndex' property.
+			RecvTable* pClassTable = pClass->m_pRecvTable;
+
+			for (int nIndex = 0; nIndex < pClassTable->m_nProps; nIndex++) {
+				RecvProp* pProp = &pClassTable->m_pProps[nIndex];
+
+				if (!pProp || strcmp(pProp->m_pVarName, "m_nModelIndex"))
+					continue;
+
+				// Store the original proxy function.
+				fnOriginalProxyFn = pProp->m_ProxyFn;
+
+				// Replace the proxy function with our model changer.
+				pProp->m_ProxyFn = (RecvVarProxyFn)SetViewModelIndex;
+
+				break;
+			}
+
+			break;
+		}
+	}
 }
 
 bool __stdcall DllMain(HINSTANCE hDLLInstance, DWORD dwReason, LPVOID lpReserved) {

Chameleon/Chameleon.vcxproj

@@ -79,10 +79,14 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClInclude Include="ClientClass.h" />
+    <ClInclude Include="DataTable.h" />
     <ClInclude Include="Defines.h" />
+    <ClInclude Include="IBaseClientDLL.h" />
     <ClInclude Include="IClientEntity.h" />
     <ClInclude Include="IClientEntityList.h" />
     <ClInclude Include="IVEngineClient.h" />
+    <ClInclude Include="IVModelInfoClient.h" />
     <ClInclude Include="SDK.h" />
     <ClInclude Include="Skins.h" />
   </ItemGroup>

Chameleon/Chameleon.vcxproj.filters

@@ -42,6 +42,18 @@
     <ClInclude Include="SDK.h">
       <Filter>Header Files\Source SDK</Filter>
     </ClInclude>
+    <ClInclude Include="DataTable.h">
+      <Filter>Header Files\Source SDK\Classes</Filter>
+    </ClInclude>
+    <ClInclude Include="ClientClass.h">
+      <Filter>Header Files\Source SDK\Classes</Filter>
+    </ClInclude>
+    <ClInclude Include="IBaseClientDLL.h">
+      <Filter>Header Files\Source SDK\Classes</Filter>
+    </ClInclude>
+    <ClInclude Include="IVModelInfoClient.h">
+      <Filter>Header Files\Source SDK\Classes</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Chameleon.cpp">

Chameleon/ClientClass.h

@@ -0,0 +1,11 @@
+#pragma once
+
+class ClientClass {
+	private:
+		char __pad[0x8];
+	public:
+		char* m_pNetworkName;
+		RecvTable* m_pRecvTable;
+		ClientClass* m_pNext;
+		int m_ClassID;
+};

Chameleon/DataTable.h

@@ -0,0 +1,53 @@
+#pragma once
+
+struct RecvProp;
+
+struct DVariant {
+	union {
+		float m_Float;
+		long m_Int;
+		char* m_pString;
+		void* m_pData;
+		float m_Vector[3];
+		__int64 m_Int64;
+	};
+
+	int	m_Type;
+};
+
+struct CRecvProxyData {
+	const RecvProp* m_pRecvProp;
+	DVariant m_Value;
+	int m_iElement;
+	int m_ObjectID;
+};
+
+struct RecvTable {
+	public:
+		RecvProp* m_pProps;
+		int m_nProps;
+		void* m_pDecoder;
+		char* m_pNetTableName;
+	private:
+		char pad00[2];
+};
+
+typedef void(__cdecl *RecvVarProxyFn)(const CRecvProxyData*, void*, void*);
+
+struct RecvProp {
+	char* m_pVarName;
+	int m_RecvType;
+	int m_Flags;
+	int m_StringBufferSize;
+	bool m_bInsideArray;
+	const void* m_pExtraData;
+	RecvProp* m_pArrayProp;
+	void* m_ArrayLengthProxy;
+	RecvVarProxyFn m_ProxyFn;
+	void* m_DataTableProxyFn;
+	RecvTable* m_pDataTable;
+	int m_Offset;
+	int m_ElementStride;
+	int m_nElements;
+	const char* m_pParentArrayPropName;
+};

Chameleon/IBaseClientDLL.h

@@ -0,0 +1,8 @@
+#pragma once
+
+class IBaseClientDLL {
+	public:
+		inline ClientClass* GetAllClasses() {
+			return CallVirtualFunction<ClientClass*(__thiscall *)(void*)>(this, 8)(this);
+		}
+};

Chameleon/IVModelInfoClient.h

@@ -0,0 +1,8 @@
+#pragma once
+
+class IVModelInfoClient {
+	public:
+		inline int GetModelIndex(const char* Filename) {
+			return CallVirtualFunction<int(__thiscall *)(void*, const char*)>(this, 2)(this, Filename);
+		}
+};

Chameleon/SDK.h

@@ -4,6 +4,15 @@
 #include <windows.h>
 
 #include "Defines.h"
+#include "DataTable.h"
+#include "ClientClass.h"
 #include "IClientEntity.h"
+#include "IBaseClientDLL.h"
 #include "IVEngineClient.h"
-#include "IClientEntityList.h"
+#include "IVModelInfoClient.h"
+#include "IClientEntityList.h"
+
+IBaseClientDLL* g_BaseClient = nullptr;
+IVEngineClient* g_EngineClient = nullptr;
+IClientEntityList* g_EntityList = nullptr;
+IVModelInfoClient* g_ModelInfo = nullptr;

Chameleon/Skins.h

@@ -3,6 +3,7 @@
 #include <unordered_map>
 
 struct EconomyItemCfg {
+	int iItemDefinitionIndex = 0;
 	int nFallbackPaintKit = 0;
 	int nFallbackSeed = 0;
 	int nFallbackStatTrak = -1;
@@ -12,6 +13,7 @@ struct EconomyItemCfg {
 };
 
 std::unordered_map<int, EconomyItemCfg> g_SkinChangerCfg;
+std::unordered_map<int, int> g_ViewModelCfg;
 
 inline void SetSkinConfig() {
 	// StatTrak™ AWP | Dragon Lore
@@ -36,4 +38,24 @@ inline void SetSkinConfig() {
 
 	// USP-S | Stainless
 	g_SkinChangerCfg[WEAPON_USP_SILENCER].nFallbackPaintKit = 277;
+
+	// Karambit | Fade (CT)
+	g_SkinChangerCfg[WEAPON_KNIFE].iItemDefinitionIndex = WEAPON_KNIFE_KARAMBIT;
+	g_SkinChangerCfg[WEAPON_KNIFE].nFallbackPaintKit = 38;
+	g_SkinChangerCfg[WEAPON_KNIFE].iEntityQuality = 3;
+
+	// M9 Bayonet | Crimson Web (T)
+	g_SkinChangerCfg[WEAPON_KNIFE_T].iItemDefinitionIndex = WEAPON_KNIFE_M9_BAYONET;
+	g_SkinChangerCfg[WEAPON_KNIFE_T].nFallbackPaintKit = 12;
+	g_SkinChangerCfg[WEAPON_KNIFE_T].iEntityQuality = 3;
+}
+
+inline void SetModelConfig() {
+	// Get the indexes of the models we want to replace.
+	int nOriginalKnifeCT = g_ModelInfo->GetModelIndex("models/weapons/v_knife_default_ct.mdl");
+	int nOriginalKnifeT = g_ModelInfo->GetModelIndex("models/weapons/v_knife_default_t.mdl");
+
+	// Configure model replacements.
+	g_ViewModelCfg[nOriginalKnifeCT] = g_ModelInfo->GetModelIndex("models/weapons/v_knife_karam.mdl");
+	g_ViewModelCfg[nOriginalKnifeT] = g_ModelInfo->GetModelIndex("models/weapons/v_knife_m9_bay.mdl");
 }