Feature for mapping. setWorldSpecialPropertyEnabled, underworldwarp property

Client/game_sa/CGameSA.cpp

@@ -581,6 +581,9 @@ bool CGameSA::IsCheatEnabled(const char* szCheatName)
     if (!strcmp(szCheatName, PROP_EXTRA_AIR_RESISTANCE))
         return IsExtraAirResistanceEnabled();
 
+    if (!strcmp(szCheatName, PROP_UNDERWORLD_WARP))
+        return IsUnderWorldWarpEnabled();
+
     std::map<std::string, SCheatSA*>::iterator it = m_Cheats.find(szCheatName);
     if (it == m_Cheats.end())
         return false;
@@ -607,6 +610,12 @@ bool CGameSA::SetCheatEnabled(const char* szCheatName, bool bEnable)
         return true;
     }
 
+    if (!strcmp(szCheatName, PROP_UNDERWORLD_WARP))
+    {
+        SetUnderWorldWarpEnabled(bEnable);
+        return true;
+    }
+
     std::map<std::string, SCheatSA*>::iterator it = m_Cheats.find(szCheatName);
     if (it == m_Cheats.end())
         return false;
@@ -622,6 +631,7 @@ void CGameSA::ResetCheats()
     SetRandomFoliageEnabled(true);
     SetMoonEasterEggEnabled(false);
     SetExtraAirResistanceEnabled(true);
+    SetUnderWorldWarpEnabled(true);
 
     std::map<std::string, SCheatSA*>::iterator it;
     for (it = m_Cheats.begin(); it != m_Cheats.end(); it++)
@@ -668,6 +678,16 @@ void CGameSA::SetExtraAirResistanceEnabled(bool bEnable)
     MemPut<BYTE>(0x72DDD9, bEnable ? 0x01 : 0x00);
 }
 
+void CGameSA::SetUnderWorldWarpEnabled(bool bEnable)
+{
+    m_bUnderworldWarp = !bEnable;
+}
+
+bool CGameSA::IsUnderWorldWarpEnabled()
+{
+    return !m_bUnderworldWarp;
+}
+
 bool CGameSA::GetJetpackWeaponEnabled(eWeaponType weaponType)
 {
     if (weaponType >= WEAPONTYPE_BRASSKNUCKLE && weaponType < WEAPONTYPE_LAST_WEAPONTYPE)

Client/game_sa/CGameSA.h

@@ -83,6 +83,7 @@
 #define PROP_RANDOM_FOLIAGE         "randomfoliage"
 #define PROP_SNIPER_MOON            "snipermoon"
 #define PROP_EXTRA_AIR_RESISTANCE   "extraairresistance"
+#define PROP_UNDERWORLD_WARP        "underworldwarp"
 
 struct SCheatSA
 {
@@ -399,6 +400,9 @@ class CGameSA : public CGame
     bool IsExtraAirResistanceEnabled();
     void SetExtraAirResistanceEnabled(bool bEnable);
 
+    bool IsUnderWorldWarpEnabled();
+    void SetUnderWorldWarpEnabled(bool bEnable);
+
     bool VerifySADataFileNames();
     bool PerformChecks();
     int& GetCheckStatus(void) { return m_iCheckStatus; }
@@ -489,6 +493,7 @@ class CGameSA : public CGame
     bool         m_bAsyncScriptForced;
     bool         m_bASyncLoadingSuspended;
     int          m_iCheckStatus;
+    bool         m_bUnderworldWarp;
 
     static unsigned long* VAR_SystemTime;
     static unsigned long* VAR_IsAtMenu;

Client/game_sa/CWorldSA.cpp

@@ -15,6 +15,63 @@ CWorldSA::CWorldSA()
     m_pBuildingRemovals = new std::multimap<unsigned short, SBuildingRemoval*>;
     m_pDataBuildings = new std::multimap<unsigned short, sDataBuildingRemovalItem*>;
     m_pBinaryBuildings = new std::multimap<unsigned short, sBuildingRemovalItem*>;
+
+    InstallHooks();
+}
+
+void HOOK_FallenPeds();
+void HOOK_FallenCars();
+
+void CWorldSA::InstallHooks(void)
+{
+    HookInstall(0x565CB0, (DWORD)HOOK_FallenPeds, 5);
+    HookInstall(0x565E80, (DWORD)HOOK_FallenCars, 5);
+}
+
+DWORD CONTINUE_CWorld_FallenPeds = 0x00565CBA;
+DWORD CONTINUE_CWorld_FallenCars = 0x00565E8A;
+
+void _declspec(naked) HOOK_FallenPeds()
+{
+    if (pGame && pGame->IsUnderWorldWarpEnabled())
+    {
+        _asm
+        {
+            sub esp, 2Ch
+            push ebx
+            mov ebx, ds:0B74490h
+            jmp CONTINUE_CWorld_FallenPeds
+        }
+    }
+    else
+    {
+        _asm
+        {
+            ret
+        }
+    }
+}
+
+
+void _declspec(naked) HOOK_FallenCars()
+{
+    if (pGame && !pGame->IsUnderWorldWarpEnabled())
+    {
+        _asm
+        {
+            sub esp, 2Ch
+            push ebx
+            mov ebx, ds:0B74494h
+            jmp CONTINUE_CWorld_FallenCars
+        }
+    }
+    else
+    {
+        _asm
+        {
+            ret
+        }
+    }
 }
 
 void CWorldSA::Add(CEntity* pEntity, eDebugCaller CallerId)
@@ -1298,4 +1355,4 @@ bool CWorldSA::CalculateImpactPosition(const CVector& vecInputStart, CVector& ve
     // Include dead peds
     MemPutFast<DWORD>(0xB7CD71, 0);
     return false;
-}
+}

Client/game_sa/CWorldSA.h

@@ -55,6 +55,7 @@ class CWorldSA : public CWorld
 {
 public:
     CWorldSA();
+    void InstallHooks(void);
     void Add(CEntity* entity, eDebugCaller CallerId);
     void Add(CEntitySAInterface* entityInterface, eDebugCaller CallerId);
     void Remove(CEntity* entity, eDebugCaller CallerId);