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import gudhi
""" 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
"""
__author__ = "Vincent Rouvreau"
__copyright__ = "Copyright (C) 2016 Inria"
__license__ = "MIT"
def test_empty_euclidean_witness_complex():
euclidean_witness = gudhi.EuclideanWitnessComplex()
assert euclidean_witness.__is_defined() == False
def test_witness_complex():
point_cloud = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0], [9.0, 6.0],
[0.0, 14.0], [2.0, 19.0], [9.0, 17.0]]
landmarks = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0]]
euclidean_witness_complex = gudhi.EuclideanWitnessComplex(landmarks=landmarks, witnesses = point_cloud)
simplex_tree = euclidean_witness_complex.create_simplex_tree(max_alpha_square=4.1)
assert landmarks[0] == euclidean_witness_complex.get_point(0)
assert landmarks[1] == euclidean_witness_complex.get_point(1)
assert landmarks[2] == euclidean_witness_complex.get_point(2)
assert simplex_tree.get_filtration() == [([0], 0.0), ([1], 0.0),
([0, 1], 0.0), ([2], 0.0), ([0, 2], 0.0), ([1, 2], 0.0),
([0, 1, 2], 0.0)]
def test_empty_euclidean_strong_witness_complex():
euclidean_strong_witness = gudhi.EuclideanStrongWitnessComplex()
assert euclidean_strong_witness.__is_defined() == False
def test_strong_witness_complex():
point_cloud = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0], [9.0, 6.0],
[0.0, 14.0], [2.0, 19.0], [9.0, 17.0]]
landmarks = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0]]
euclidean_strong_witness_complex = gudhi.EuclideanStrongWitnessComplex(landmarks=landmarks, witnesses = point_cloud)
simplex_tree = euclidean_strong_witness_complex.create_simplex_tree(max_alpha_square=14.9)
assert landmarks[0] == euclidean_strong_witness_complex.get_point(0)
assert landmarks[1] == euclidean_strong_witness_complex.get_point(1)
assert landmarks[2] == euclidean_strong_witness_complex.get_point(2)
assert simplex_tree.get_filtration() == [([0], 0.0), ([1], 0.0), ([2], 0.0)]
simplex_tree = euclidean_strong_witness_complex.create_simplex_tree(max_alpha_square=100.0)
assert simplex_tree.get_filtration() == [([0], 0.0), ([1], 0.0),
([2], 0.0), ([1, 2], 15.0), ([0, 2], 34.0), ([0, 1], 37.0),
([0, 1, 2], 37.0)]
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