protected virtual void Start()
    {
        data = null;

        mTrackableBehaviour = GetComponent <TrackableBehaviour>();
        if (mTrackableBehaviour)
        {
            mTrackableBehaviour.RegisterTrackableEventHandler(this);
        }

        JSParser parser = new JSParser();

        parser.OverlayDataGenerated += HandleEvent;
        parser.StartCalculating();
    }