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tamaas/tests/test_flood_fill.py
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test_flood_fill.py
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# -*- coding: utf-8 -*-
#
# Copyright (©) 2016-2023 EPFL (École Polytechnique Fédérale de Lausanne),
# Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
# Copyright (©) 2020-2023 Lucas Frérot
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from __future__ import print_function, division
import tamaas as tm
import numpy as np
def test_flood_fill2d():
field = np.zeros((18, 18), bool)
# Cluster of permeter 18 area 13
field[2:4, 3:6] = True
field[4, 4:6] = True # noqa
field[5, 5] = True # noqa
field[3:5, 6:8] = True # noqa
# Cluster of perimeter 8 area 4
field[14:16, 3:5] = True
# Cluster of perimeter 20 area 11
field[9:11, 8:11] = True # noqa
field[7:9, 9] = True # noqa
field[10, 11:14] = True # noqa
# Cluster of perimeter 18 area 9
field[3:5, 14:16] = True
field[5:10, 15] = True
# Cluster spanning periodic boundary
field[0:3, 12:14] = True
field[-2:, 12:14] = True
# Percolating cluster
field[12, :] = True
if False:
# Show contact map
import matplotlib.pyplot as plt
plt.imshow(field, interpolation='none', cmap='gray_r', origin='lower')
plt.xlim(0, 17)
plt.ylim(0, 17)
plt.show()
clusters = tm.FloodFill.getClusters(field, False)
# Dummy class for clusters
class dummy:
def __init__(self, area, perimeter, extent=None):
self.area = area
self.perimeter = perimeter
self.extent = extent
# Solution
ref = [
dummy(10, 14, [5, 2]), # cluster spanning pbc
dummy(13, 18),
dummy(9, 18),
dummy(11, 20),
dummy(18, 36, [1, 18]), # percolating cluster
dummy(4, 8)
]
assert len(ref) == len(clusters)
for x, y in zip(clusters, ref):
assert x.area == y.area
assert x.perimeter == y.perimeter
if y.extent is not None:
assert x.extent == y.extent
field[:] = True
field[2:4, 2:4] = False
clusters = tm.FloodFill.getClusters(field, False)
assert clusters[0].extent == [18, 18]
def test_flood_fill3d():
field = np.zeros((5, 5, 5), bool)
field[2:4, 3, 1:3] = True
clusters = tm.FloodFill.getVolumes(field, False)
assert len(clusters) == 1
assert clusters[0].area == 4
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