def count_z_depth_parameters(camera, one, zero):
    """ count parameters for initialization of nodes

    :param camera: < camera
    :param one: 0 < one < camera
    :param zero: 0 < zero < camera
    :return: (offset, size, use_min, min, use_max, max)
    """
    offset =  - (camera - one)
    size = 1.0 / (one - zero)
    return (offset, size, True, 0, True, 1)