private void switchAutoFocus()
    {
        if (camFocus.mVuforiaStarted)
        {
            if (AutoFocus)
            {
                camFocus.SetAutofocus();
            }
            else
            {
                camFocus.SetFixedFocus();
            }

            if (AutoFocus != b_CameraChangeBeforeStep)
            {
                camFocus.RestartCamera();
                b_CameraChangeBeforeStep = AutoFocus;
            }
        }
    }