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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 cython cimport numeric
-from libcpp.vector cimport vector
-from libcpp.utility cimport pair
-import os
-
-__author__ = "Vincent Rouvreau"
-__copyright__ = "Copyright (C) 2016 Inria"
-__license__ = "GPL v3"
-
-cdef extern from "Bottleneck_distance_interface.h" namespace "Gudhi::persistence_diagram":
- double bottleneck(vector[pair[double, double]], vector[pair[double, double]], double)
- double bottleneck(vector[pair[double, double]], vector[pair[double, double]])
-
-def bottleneck_distance(diagram_1, diagram_2, e=None):
- """This function returns the point corresponding to a given vertex.
-
- :param diagram_1: The first diagram.
- :type diagram_1: vector[pair[double, double]]
- :param diagram_2: The second diagram.
- :type diagram_2: vector[pair[double, double]]
- :param e: If `e` is 0, this uses an expensive algorithm to compute the
- exact distance.
- If `e` is not 0, it asks for an additive `e`-approximation, and
- currently also allows a small multiplicative error (the last 2 or 3
- bits of the mantissa may be wrong). This version of the algorithm takes
- advantage of the limited precision of `double` and is usually a lot
- faster to compute, whatever the value of `e`.
-
- Thus, by default, `e` is the smallest positive double.
- :type e: float
- :rtype: float
- :returns: the bottleneck distance.
- """
- if e is None:
- # Default value is the smallest double value (not 0, 0 is for exact version)
- return bottleneck(diagram_1, diagram_2)
- else:
- # Can be 0 for exact version
- return bottleneck(diagram_1, diagram_2, e)