Core/Vehicles: Fixed channeled spells being interrupted for passengers when vehicle moves

src/server/game/Handlers/MovementHandler.cpp

@@ -30,6 +30,7 @@
 #include "WaypointMovementGenerator.h"
 #include "InstanceSaveMgr.h"
 #include "ObjectMgr.h"
+#include "Vehicle.h"
 
 #define MOVEMENT_PACKET_TIME_DELAY 0
 
@@ -370,10 +371,20 @@ void WorldSession::HandleMovementOpcodes(WorldPacket& recvData)
 
     mover->m_movementInfo = movementInfo;
 
-    // this is almost never true (not sure why it is sometimes, but it is), normally use mover->IsVehicle()
-    if (mover->GetVehicle())
+    // Some vehicles allow the passenger to turn by himself
+    if (Vehicle* vehicle = mover->GetVehicle())
     {
-        mover->SetOrientation(movementInfo.pos.GetOrientation());
+        if (VehicleSeatEntry const* seat = vehicle->GetSeatForPassenger(mover))
+        {
+            if (seat->m_flags & VEHICLE_SEAT_FLAG_ALLOW_TURNING)
+            {
+                if (movementInfo.pos.GetOrientation() != mover->GetOrientation())
+                {
+                    mover->SetOrientation(movementInfo.pos.GetOrientation());
+                    mover->RemoveAurasWithInterruptFlags(AURA_INTERRUPT_FLAG_TURNING);
+                }
+            }
+        }
         return;
     }