Core/Transports

* Rewritten path generation, now uses splines - timers are a lot more accurate now
* Implemented stopping transports
* Implemented spawning transports in instances
* Implemented spawning gameobjects as transport passengers
* Transport passengers are now stored in creature/gameobject table using gameobject_template.data6 from transport's template as map id

src/server/game/Entities/Unit/Unit.cpp

@@ -17329,6 +17329,8 @@ void Unit::SetFacingTo(float ori)
 {
     Movement::MoveSplineInit init(this);
     init.MoveTo(GetPositionX(), GetPositionY(), GetPositionZMinusOffset(), false);
+    if (HasUnitMovementFlag(MOVEMENTFLAG_ONTRANSPORT) && GetTransGUID())
+        init.DisableTransportPathTransformations(); // It makes no sense to target global orientation
     init.SetFacing(ori);
     init.Launch();
 }
@@ -17340,7 +17342,10 @@ void Unit::SetFacingToObject(WorldObject* object)
         return;
 
     /// @todo figure out under what conditions creature will move towards object instead of facing it where it currently is.
-    SetFacingTo(GetAngle(object));
+    Movement::MoveSplineInit init(this);
+    init.MoveTo(GetPositionX(), GetPositionY(), GetPositionZMinusOffset());
+    init.SetFacing(GetAngle(object));   // when on transport, GetAngle will still return global coordinates (and angle) that needs transforming
+    init.Launch();
 }
 
 bool Unit::SetWalk(bool enable)