def compute_knot_vector2(degree, num_dpts, num_cpts, params):
    """ Computes a knot vector ensuring that every knot span has at least one :math:`\\overline{u}_{k}`.

    Please refer to the Equations 9.68 and 9.69 on The NURBS Book (2nd Edition), p.412 for details.

    :param degree: degree
    :type degree: int
    :param num_dpts: number of data points
    :type num_dpts: int
    :param num_cpts: number of control points
    :type num_cpts: int
    :param params: list of parameters, :math:`\\overline{u}_{k}`
    :type params: list, tuple
    :return: knot vector
    :rtype: list
    """
    kv = [(0.0) for _ in range(degree + 1)]
    d = float(num_dpts) / float(num_cpts - degree)
    for j in range(1, num_cpts - degree):
        i = int(j * d)
        alpha = j * d - i
        temp_kv = (1.0 - alpha) * params[i - 1] + alpha * params[i]
        kv.append(temp_kv)
    kv += [(1.0) for _ in range(degree + 1)]
    return kv
