(degree, knotvector, params, points)
return matrix_a
Builds the coefficient matrix for global interpolation.

    This function only uses data points to build the coefficient matrix. Please refer to The NURBS Book (2nd Edition),
    pp364-370 for details.

    :param degree: degree
    :type degree: int
    :param knotvector: knot vector
    :type knotvector: list, tuple
    :param params: list of parameters
    :type params: list, tuple
    :param points: data points
    :type points: list, tuple
    :return: coefficient matrix
    :rtype: list
Builds the coefficient matrix for global interpolation.
Builds the coefficient matrix for global interpolation .
def _build_coeff_matrix(degree, knotvector, params, points):
    """ Builds the coefficient matrix for global interpolation.

    This function only uses data points to build the coefficient matrix. Please refer to The NURBS Book (2nd Edition),
    pp364-370 for details.

    :param degree: degree
    :type degree: int
    :param knotvector: knot vector
    :type knotvector: list, tuple
    :param params: list of parameters
    :type params: list, tuple
    :param points: data points
    :type points: list, tuple
    :return: coefficient matrix
    :rtype: list
    """
    # Number of data points
    num_points = len(points)

    # Set up coefficient matrix
    matrix_a = [[0.0 for _ in range(num_points)] for _ in range(num_points)]
    for i in range(num_points):
        span = helpers.find_span_linear(degree, knotvector, num_points, params[i])
        matrix_a[i][span-degree:span+1] = helpers.basis_function(degree, knotvector, span, params[i])

    # Return coefficient matrix
    return matrix_a
def _build_coeff_matrix ( degree , knotvector , params , points ) : # Number of data points num_points = len ( points ) # Set up coefficient matrix matrix_a = [ [ 0.0 for _ in range ( num_points ) ] for _ in range ( num_points ) ] for i in range ( num_points ) : span = helpers . find_span_linear ( degree , knotvector , num_points , params [ i ] ) matrix_a [ i ] [ span - degree : span + 1 ] = helpers . basis_function ( degree , knotvector , span , params [ i ] ) # Return coefficient matrix return matrix_a