Restore vehicle framerate fixes (rapid stop) as toggleable glitch

Client/mods/deathmatch/logic/CClientGame.cpp

@@ -137,6 +137,8 @@ CClientGame::CClientGame(bool bLocalPlay) : m_ServerInfo(new CServerInfo())
     m_Glitches[GLITCH_BADDRIVEBYHITBOX] = false;
     m_Glitches[GLITCH_QUICKSTAND] = false;
     m_Glitches[GLITCH_KICKOUTOFVEHICLE_ONMODELREPLACE] = false;
+    m_Glitches[GLITCH_VEHICLE_RAPID_STOP] = false;
+    g_pMultiplayer->SetRapidVehicleStopFixEnabled(true);
 
     g_pMultiplayer->DisableBadDrivebyHitboxes(true);
 
@@ -5992,6 +5994,8 @@ bool CClientGame::SetGlitchEnabled(unsigned char ucGlitch, bool bEnabled)
             g_pMultiplayer->DisableQuickReload(!bEnabled);
         if (ucGlitch == GLITCH_CLOSEDAMAGE)
             g_pMultiplayer->DisableCloseRangeDamage(!bEnabled);
+        if (ucGlitch == GLITCH_VEHICLE_RAPID_STOP)
+            g_pMultiplayer->SetRapidVehicleStopFixEnabled(!bEnabled);
         return true;
     }
     return false;

Client/mods/deathmatch/logic/CClientGame.h

@@ -204,6 +204,7 @@ class CClientGame
         GLITCH_BADDRIVEBYHITBOX,
         GLITCH_QUICKSTAND,
         GLITCH_KICKOUTOFVEHICLE_ONMODELREPLACE,
+        GLITCH_VEHICLE_RAPID_STOP,
         NUM_GLITCHES
     };
 

Client/mods/deathmatch/logic/CPacketHandler.cpp

@@ -2378,6 +2378,7 @@ void CPacketHandler::Packet_MapInfo(NetBitStreamInterface& bitStream)
     g_pClientGame->SetGlitchEnabled(CClientGame::GLITCH_FASTSPRINT, funBugs.data3.bFastSprint);
     g_pClientGame->SetGlitchEnabled(CClientGame::GLITCH_BADDRIVEBYHITBOX, funBugs.data4.bBadDrivebyHitboxes);
     g_pClientGame->SetGlitchEnabled(CClientGame::GLITCH_QUICKSTAND, funBugs.data5.bQuickStand);
+    g_pClientGame->SetGlitchEnabled(CClientGame::GLITCH_VEHICLE_RAPID_STOP, funBugs.data6.vehicleRapidStop);
 
     SWorldSpecialPropertiesStateSync wsProps;
     if (bitStream.Can(eBitStreamVersion::WorldSpecialProperties))

Client/multiplayer_sa/CMultiplayerSA.h

@@ -336,6 +336,9 @@ class CMultiplayerSA : public CMultiplayer
     bool IsVehicleEngineAutoStartEnabled() const noexcept override;
     void SetVehicleEngineAutoStartEnabled(bool enabled) override;
 
+    bool IsRapidVehicleStopFixEnabled() const noexcept override { return m_isRapidVehicleStopFixEnabled; };
+    void SetRapidVehicleStopFixEnabled(bool enabled) override;
+
     void SetPedTargetingMarkerEnabled(bool bEnable);
     bool IsPedTargetingMarkerEnabled();
     bool IsConnected();
@@ -385,6 +388,8 @@ class CMultiplayerSA : public CMultiplayer
     DWORD               m_dwLastAnimArrayAddress;
     float               m_fShadowsOffset;
 
+    bool m_isRapidVehicleStopFixEnabled{false};
+
     /*  VOID                        SetPlayerShotVectors(CPlayerPed* player, Vector3D * vecTarget, Vector3D * vecStart);
         VOID                        SetPlayerCameraVectors(CPlayerPed* player, Vector3D * vecSource, Vector3D * vecFront);
         Vector3D                    * GetLocalShotOriginVector();*/

Client/multiplayer_sa/CMultiplayerSA_FrameRateFixes.cpp

@@ -619,6 +619,77 @@ static void __declspec(naked) HOOK_CWeapon_Update()
     }
 }
 
+#define HOOKPOS_CPhysical__ApplyAirResistance  0x544D29
+#define HOOKSIZE_CPhysical__ApplyAirResistance 5
+static const unsigned int    RETURN_CPhysical__ApplyAirResistance = 0x544D4D;
+static void _declspec(naked) HOOK_CPhysical__ApplyAirResistance()
+{
+    _asm {
+        fld ds:[0x862CD0]            // 0.99000001f
+        fld ds:[0xB7CB5C]            // CTimer::ms_fTimeStep
+        fdiv kOriginalTimeStep            // 1.666f
+        mov eax, 0x822130            // powf
+        call eax
+
+        fld st(0)
+        fmul [esi+0x50]
+        fstp [esi+0x50]
+
+        fld st(0)
+        fmul [esi+0x54]
+        fstp [esi+0x54]
+
+        fmul [esi+0x58]
+        fstp [esi+0x58]
+        jmp RETURN_CPhysical__ApplyAirResistance
+    }
+}
+
+template <unsigned int returnAddress>
+static void _declspec(naked) HOOK_VehicleRapidStopFix()
+{
+    static unsigned int RETURN_VehicleRapidStopFix = returnAddress;
+    _asm {
+        fld ds:[0xC2B9CC]            // mod_HandlingManager.m_fWheelFriction
+        fmul ds:[0xB7CB5C]            // CTimer::ms_fTimeStep
+        fdiv kOriginalTimeStep            // 1.666f
+        jmp RETURN_VehicleRapidStopFix
+    }
+}
+
+void CMultiplayerSA::SetRapidVehicleStopFixEnabled(bool enabled)
+{
+    if (m_isRapidVehicleStopFixEnabled == enabled)
+        return;
+
+    if (enabled)
+    {
+        EZHookInstall(CPhysical__ApplyAirResistance);
+
+        // CVehicle::ProcessWheel
+        HookInstall(0x6D6E69, (DWORD)HOOK_VehicleRapidStopFix<0x6D6E6F>, 6);
+        HookInstall(0x6D6EA8, (DWORD)HOOK_VehicleRapidStopFix<0x6D6EAE>, 6);
+
+        // CVehicle::ProcessBikeWheel
+        HookInstall(0x6D767F, (DWORD)HOOK_VehicleRapidStopFix<0x6D7685>, 6);
+        HookInstall(0x6D76AB, (DWORD)HOOK_VehicleRapidStopFix<0x6D76B1>, 6);
+        HookInstall(0x6D76CD, (DWORD)HOOK_VehicleRapidStopFix<0x6D76D3>, 6);
+    }
+    else
+    {
+        MemCpy((void*)HOOKPOS_CPhysical__ApplyAirResistance, "\xD9\x46\x50\xD8\x0D", 5);
+
+        MemCpy((void*)0x6D6E69, "\xD9\x05\xCC\xB9\xC2\x00", 6);
+        MemCpy((void*)0x6D6EA8, "\xD9\x05\xCC\xB9\xC2\x00", 6);
+
+        MemCpy((void*)0x6D767F, "\xD9\x05\xCC\xB9\xC2\x00", 6);
+        MemCpy((void*)0x6D76AB, "\xD9\x05\xCC\xB9\xC2\x00", 6);
+        MemCpy((void*)0x6D76CD, "\xD9\x05\xCC\xB9\xC2\x00", 6);
+    }
+
+    m_isRapidVehicleStopFixEnabled = enabled;
+}
+
 void CMultiplayerSA::InitHooks_FrameRateFixes()
 {
     EZHookInstall(CTaskSimpleUseGun__SetMoveAnim);

Client/sdk/multiplayer/CMultiplayer.h

@@ -447,6 +447,9 @@ class CMultiplayer
     virtual bool IsVehicleEngineAutoStartEnabled() const noexcept = 0;
     virtual void SetVehicleEngineAutoStartEnabled(bool enabled) = 0;
 
+    virtual bool IsRapidVehicleStopFixEnabled() const noexcept = 0;
+    virtual void SetRapidVehicleStopFixEnabled(bool enabled) = 0;
+
     virtual void SetPedTargetingMarkerEnabled(bool bEnabled) = 0;
     virtual bool IsPedTargetingMarkerEnabled() = 0;
 

Server/mods/deathmatch/logic/CGame.cpp

@@ -240,6 +240,7 @@ CGame::CGame() : m_FloodProtect(4, 30000, 30000)            // Max of 4 connecti
     m_Glitches[GLITCH_BADDRIVEBYHITBOX] = false;
     m_Glitches[GLITCH_QUICKSTAND] = false;
     m_Glitches[GLITCH_KICKOUTOFVEHICLE_ONMODELREPLACE] = false;
+    m_Glitches[GLITCH_VEHICLE_RAPID_STOP] = false;
     for (int i = 0; i < WEAPONTYPE_LAST_WEAPONTYPE; i++)
         m_JetpackWeapons[i] = false;
 
@@ -279,6 +280,7 @@ CGame::CGame() : m_FloodProtect(4, 30000, 30000)            // Max of 4 connecti
     m_GlitchNames["baddrivebyhitbox"] = GLITCH_BADDRIVEBYHITBOX;
     m_GlitchNames["quickstand"] = GLITCH_QUICKSTAND;
     m_GlitchNames["kickoutofvehicle_onmodelreplace"] = GLITCH_KICKOUTOFVEHICLE_ONMODELREPLACE;
+    m_GlitchNames["vehicle_rapid_stop"] = GLITCH_VEHICLE_RAPID_STOP;
 
     m_bCloudsEnabled = true;
 

Server/mods/deathmatch/logic/CGame.h

@@ -196,6 +196,7 @@ class CGame
         GLITCH_BADDRIVEBYHITBOX,
         GLITCH_QUICKSTAND,
         GLITCH_KICKOUTOFVEHICLE_ONMODELREPLACE,
+        GLITCH_VEHICLE_RAPID_STOP,
         NUM_GLITCHES
     };
 

Server/mods/deathmatch/logic/packets/CMapInfoPacket.cpp

@@ -170,6 +170,7 @@ bool CMapInfoPacket::Write(NetBitStreamInterface& BitStream) const
     funBugs.data3.bFastSprint = g_pGame->IsGlitchEnabled(CGame::GLITCH_FASTSPRINT);
     funBugs.data4.bBadDrivebyHitboxes = g_pGame->IsGlitchEnabled(CGame::GLITCH_BADDRIVEBYHITBOX);
     funBugs.data5.bQuickStand = g_pGame->IsGlitchEnabled(CGame::GLITCH_QUICKSTAND);
+    funBugs.data6.vehicleRapidStop = g_pGame->IsGlitchEnabled(CGame::GLITCH_VEHICLE_RAPID_STOP);
     BitStream.Write(&funBugs);
 
     // Write world special properties states

Shared/sdk/net/SyncStructures.h

@@ -1964,6 +1964,10 @@ struct SFunBugsStateSync : public ISyncStructure
     {
         BITCOUNT5 = 1
     };
+    enum
+    {
+        BITCOUNT6 = 1
+    };
 
     bool Read(NetBitStreamInterface& bitStream)
     {
@@ -1984,6 +1988,10 @@ struct SFunBugsStateSync : public ISyncStructure
             bOk &= bitStream.ReadBits(reinterpret_cast<char*>(&data5), BITCOUNT5);
         else
             data5.bQuickStand = 0;
+        if (bitStream.Can(eBitStreamVersion::Glitch_VehicleRapidStop))
+            bOk &= bitStream.ReadBits(reinterpret_cast<char*>(&data6), BITCOUNT6);
+        else
+            data6.vehicleRapidStop = 0;
 
         //// Example for adding item:
         // if ( bitStream.Version() >= 0x999 )
@@ -2004,6 +2012,8 @@ struct SFunBugsStateSync : public ISyncStructure
             bitStream.WriteBits(reinterpret_cast<const char*>(&data4), BITCOUNT4);
         if (bitStream.Can(eBitStreamVersion::QuickStandGlitch))
             bitStream.WriteBits(reinterpret_cast<const char*>(&data5), BITCOUNT5);
+        if (bitStream.Can(eBitStreamVersion::Glitch_VehicleRapidStop))
+            bitStream.WriteBits(reinterpret_cast<const char*>(&data6), BITCOUNT6);
 
         //// Example for adding item:
         // if (bitStream.Can(eBitStreamVersion::YourGlitch))
@@ -2042,6 +2052,12 @@ struct SFunBugsStateSync : public ISyncStructure
     {
         bool bQuickStand : 1;
     } data5;
+
+    // Add new ones in separate structs
+    struct
+    {
+        bool vehicleRapidStop : 1;
+    } data6;
 };
 
 //////////////////////////////////////////

Shared/sdk/net/bitstream.h

@@ -624,6 +624,10 @@ enum class eBitStreamVersion : unsigned short
     // 2025-06-02
     WorldSpecialProperty_VehicleEngineAutoStart,
 
+    // Add "vehicle_rapid_stop" to setGlitchEnabled
+    // 2025-06-05
+    Glitch_VehicleRapidStop,
+
     // This allows us to automatically increment the BitStreamVersion when things are added to this enum.
     // Make sure you only add things above this comment.
     Next,