I also found an interesting thing, every time I plug in my 4C it need be initialized by Tobii EyeX Interaction(Tobii.EyeX.Tray.exe)
,otherwise it didn’t work in any mode,even in gaze tracking. after start EyeX program, it begin to work(even then close that program it still work)
So, I think if this is because problem when initialize 4C tracker that cause the head tracking didn’t work.
Is that necessary to initialize 4C every time it works?
Is their any other way to initialize 4C?