void Awake()
{
_tracks = GetComponentInChildren <grabot_tracks>();
_hand = GetComponentInChildren <grabot_hand>();
_hand.init(this);
_hand_zoom_help_cos = Mathf.Cos(hand_zoom_help_deg * Mathf.Deg2Rad);
}
// Use this for initialization
protected override void Start()
{
base.Start();
_hand = _joint.transform.parent.GetComponentInChildren <grabot_hand>();
}