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# This file is part of the Gudhi Library - https://gudhi.inria.fr/ -
# which is released under MIT.
# See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full
# license details.
# Author(s): Vincent Rouvreau
#
# Copyright (C) 2016 Inria
#
# Modification(s):
# - YYYY/MM Author: Description of the modification
from __future__ import print_function
from cython cimport numeric
from libcpp.vector cimport vector
from libcpp.string cimport string
cimport cython
import errno
import os
import numpy as np
__author__ = "Vincent Rouvreau"
__copyright__ = "Copyright (C) 2016 Inria"
__license__ = "MIT"
cdef extern from "Off_reader_interface.h" namespace "Gudhi":
vector[vector[double]] read_points_from_OFF_file(string off_file)
def read_points_from_off_file(off_file=''):
"""Read points from an `OFF file <fileformats.html#off-file-format>`_.
:param off_file: An OFF file style name.
:type off_file: string
:returns: The point set.
:rtype: List[List[float]]
"""
if off_file:
if os.path.isfile(off_file):
return read_points_from_OFF_file(off_file.encode('utf-8'))
else:
raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT),
off_file)
@cython.embedsignature(True)
def write_points_to_off_file(fname, points):
"""Write points to an `OFF file <fileformats.html#off-file-format>`_.
A simple wrapper for `numpy.savetxt`.
:param fname: Name of the OFF file.
:type fname: str or file handle
:param points: Point coordinates.
:type points: numpy array of shape (n, dim)
"""
points = np.array(points, copy=False)
assert len(points.shape) == 2
dim = points.shape[1]
if dim == 3:
head = 'OFF\n{} 0 0'.format(points.shape[0])
else:
head = 'nOFF\n{} {} 0 0'.format(dim, points.shape[0])
np.savetxt(fname, points, header=head, comments='')
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