def download_sparse_points():
    """Used with ``download_saddle_surface``"""
    saved_file, _ = _download_file('sparsePoints.txt')
    points_reader = vtk.vtkDelimitedTextReader()
    points_reader.SetFileName(saved_file)
    points_reader.DetectNumericColumnsOn()
    points_reader.SetFieldDelimiterCharacters('\t')
    points_reader.SetHaveHeaders(True)
    table_points = vtk.vtkTableToPolyData()
    table_points.SetInputConnection(points_reader.GetOutputPort())
    table_points.SetXColumn('x')
    table_points.SetYColumn('y')
    table_points.SetZColumn('z')
    table_points.Update()
    return vtki.wrap(table_points.GetOutput())
Used with ``download_saddle_surface``