// Use this for initialization
    void Start()
    {
        ARModeBtn.onClick.AddListener(() => ChangeToARMode());
        NewsFeedBtn.onClick.AddListener(() => EnableUIPanel(NewsFeedView));
        SettingsBtn.onClick.AddListener(() => EnableUIPanel(SettingsView));
        NavDrawerBtn.onClick.AddListener(() => OpenNavigationDrawer(true));
        NavDrawBG.onClick.AddListener(() => OpenNavigationDrawer(false));
        ProfileBtn.onClick.AddListener(() => EnableUIPanel(Profile));
        GalleryBtn.onClick.AddListener(() => EnableUIPanel(Gallery));
        SignOutBtn.onClick.AddListener(() => ExitApplication());

        NavDrawer.SetActive(false);

        loadingScreenBG.SetActive(false);
        loadingSlider.gameObject.SetActive(false);
        loadingText.gameObject.SetActive(false);

        currentScene = SceneManager.GetActiveScene().name;
    }
 void OpenNavigationDrawer(bool isNavActive)
 {
     NavDrawer.SetActive(isNavActive);
 }