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# -*- coding: utf-8 -*-
import numpy as np
import pytest
from trx.streamlines_ops import (perform_streamlines_operation,
intersection, union, difference)
streamlines_ori = [np.ones(90).reshape((30, 3)),
np.arange(90).reshape((30, 3)) + 0.3333]
@pytest.mark.parametrize(
"precision, noise, expected",
[
(0, 0.0001, [4]),
(1, 0.0001, [4]),
(2, 0.0001, [4]),
(4, 0.0001, []),
(0, 0.01, [4]),
(1, 0.01, [4]),
(2, 0.01, []),
(0, 1, []),
],
)
def test_intersection(precision, noise, expected):
streamlines_new = []
for i in range(5):
if i < 4:
streamlines_new.append(streamlines_ori[1] +
np.random.random((30, 3)))
else:
streamlines_new.append(streamlines_ori[1] +
noise * np.random.random((30, 3)))
# print(streamlines_new)
_, indices_uniq = perform_streamlines_operation(intersection,
[streamlines_new,
streamlines_ori],
precision=precision)
indices_uniq = indices_uniq.tolist()
assert indices_uniq == expected
@pytest.mark.parametrize(
"precision, noise, expected",
[
(0, 0.0001, 6),
(1, 0.0001, 6),
(2, 0.0001, 6),
(4, 0.0001, 7),
(0, 0.01, 6),
(1, 0.01, 6),
(2, 0.01, 7),
(0, 1, 7),
],
)
def test_union(precision, noise, expected):
streamlines_new = []
for i in range(5):
if i < 4:
streamlines_new.append(streamlines_ori[1] +
np.random.random((30, 3)))
else:
streamlines_new.append(streamlines_ori[1] +
noise * np.random.random((30, 3)))
unique_streamlines, _ = perform_streamlines_operation(union,
[streamlines_new,
streamlines_ori],
precision=precision)
assert len(unique_streamlines) == expected
@pytest.mark.parametrize(
"precision, noise, expected",
[
(0, 0.0001, 4),
(1, 0.0001, 4),
(2, 0.0001, 4),
(4, 0.0001, 5),
(0, 0.01, 4),
(1, 0.01, 4),
(2, 0.01, 5),
(0, 1, 5),
],
)
def test_difference(precision, noise, expected):
streamlines_new = []
for i in range(5):
if i < 4:
streamlines_new.append(streamlines_ori[1] +
np.random.random((30, 3)))
else:
streamlines_new.append(streamlines_ori[1] +
noise * np.random.random((30, 3)))
unique_streamlines, _ = perform_streamlines_operation(difference,
[streamlines_new,
streamlines_ori],
precision=precision)
assert len(unique_streamlines) == expected
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