Coverage for tests/test_Circle.py: 18%
120 statements
« prev ^ index » next coverage.py v7.2.7, created at 2023-07-12 10:50 -0700
« prev ^ index » next coverage.py v7.2.7, created at 2023-07-12 10:50 -0700
1#
2# LSST Data Management System
3# See COPYRIGHT file at the top of the source tree.
4#
5# This product includes software developed by the
6# LSST Project (http://www.lsst.org/).
7#
8# This program is free software: you can redistribute it and/or modify
9# it under the terms of the GNU General Public License as published by
10# the Free Software Foundation, either version 3 of the License, or
11# (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the LSST License Statement and
19# the GNU General Public License along with this program. If not,
20# see <https://www.lsstcorp.org/LegalNotices/>.
21#
23import pickle
25try:
26 import yaml
27except ImportError:
28 yaml = None
30import math
31import unittest
33import numpy as np
34from lsst.sphgeom import CONTAINS, DISJOINT, Angle, Circle, Region, UnitVector3d
37class CircleTestCase(unittest.TestCase):
38 """Test Circle."""
40 def setUp(self):
41 np.random.seed(1)
43 def test_construction(self):
44 self.assertTrue(Circle.empty().isEmpty())
45 self.assertTrue(Circle().isEmpty())
46 self.assertTrue(Circle.full().isFull())
47 c = Circle(UnitVector3d.X())
48 self.assertEqual(c.getOpeningAngle(), Angle(0))
49 self.assertEqual(c.getSquaredChordLength(), 0)
50 c = Circle(UnitVector3d.Z(), 2.0)
51 self.assertTrue(c.contains(UnitVector3d.Z()))
52 c = Circle(UnitVector3d.Z(), Angle(math.pi))
53 self.assertTrue(c.isFull())
54 d = c.clone()
55 self.assertEqual(c, d)
56 self.assertNotEqual(id(c), id(d))
57 e = Circle(d)
58 self.assertEqual(d, e)
60 def test_comparison_operators(self):
61 c = Circle(UnitVector3d.X(), 4.0)
62 d = Circle(UnitVector3d.Y(), 4.0)
63 self.assertEqual(c, d)
64 self.assertTrue(c.isFull())
65 self.assertNotEqual(c, Circle(UnitVector3d.Z()))
67 def test_center_and_dimensions(self):
68 c = Circle(UnitVector3d.X(), 1)
69 self.assertEqual(c.getCenter(), UnitVector3d.X())
70 self.assertEqual(c.getSquaredChordLength(), 1)
71 self.assertAlmostEqual(c.getOpeningAngle().asRadians(), math.pi / 3)
73 def test_relationships(self):
74 c = Circle(UnitVector3d.X(), Angle.fromDegrees(0.1))
75 d = Circle(UnitVector3d(1, 1, 1), Angle(math.pi / 2))
76 e = Circle(-UnitVector3d.X())
77 self.assertTrue(c.contains(UnitVector3d.X()))
78 self.assertTrue(UnitVector3d.X() in c)
79 self.assertTrue(d.contains(c))
80 self.assertTrue(c.isWithin(d))
81 self.assertTrue(c.intersects(d))
82 self.assertTrue(c.intersects(UnitVector3d.X()))
83 self.assertTrue(e.isDisjointFrom(d))
84 self.assertEqual(d.relate(c), CONTAINS)
85 self.assertEqual(e.relate(d), DISJOINT)
87 def test_vectorized_contains(self):
88 b = Circle(UnitVector3d(*np.random.randn(3)), Angle(0.4 * math.pi))
89 x = np.random.rand(5, 3)
90 y = np.random.rand(5, 3)
91 z = np.random.rand(5, 3)
92 c = b.contains(x, y, z)
93 lon = np.arctan2(y, x)
94 lat = np.arctan2(z, np.hypot(x, y))
95 c2 = b.contains(lon, lat)
96 for i in range(x.shape[0]):
97 for j in range(x.shape[1]):
98 u = UnitVector3d(x[i, j], y[i, j], z[i, j])
99 self.assertEqual(c[i, j], b.contains(u))
100 self.assertEqual(c2[i, j], b.contains(u))
101 # test with non-contiguous memory
102 c3 = b.contains(x[::2], y[::2], z[::2])
103 c4 = b.contains(lon[::2], lat[::2])
104 for i in range(x.shape[0], 2):
105 for j in range(x.shape[1]):
106 u = UnitVector3d(x[i, j], y[i, j], z[i, j])
107 self.assertEqual(c3[i // 2, j], b.contains(u))
108 self.assertEqual(c4[i // 2, j], b.contains(u))
110 def test_expanding_and_clipping(self):
111 a = Circle.empty()
112 b = (
113 a.expandedTo(UnitVector3d.X())
114 .expandedTo(Circle(UnitVector3d.Y(), 1))
115 .clippedTo(Circle(UnitVector3d(1, 1, 0), 1))
116 .clippedTo(UnitVector3d.Y())
117 )
118 a.expandTo(UnitVector3d.X())
119 a.expandTo(Circle(UnitVector3d.Y(), 1))
120 a.clipTo(Circle(UnitVector3d(1, 1, 0), 1))
121 a.clipTo(UnitVector3d.Y())
122 self.assertEqual(a, b)
123 self.assertEqual(a, Circle(UnitVector3d.Y()))
124 a.clipTo(UnitVector3d.Z())
125 self.assertTrue(a.isEmpty())
127 def test_dilation_and_erosion(self):
128 a = Angle(math.pi / 2)
129 c = Circle(UnitVector3d.X())
130 d = c.dilatedBy(a).erodedBy(a)
131 c.dilateBy(a).erodeBy(a)
132 self.assertEqual(c, d)
133 self.assertEqual(c, Circle(UnitVector3d.X()))
135 def test_complement(self):
136 c = Circle(UnitVector3d.X(), 2.0)
137 d = c.complemented()
138 c.complement()
139 self.assertEqual(c, d)
140 self.assertEqual(c.getCenter(), -UnitVector3d.X())
141 self.assertEqual(c.getSquaredChordLength(), 2.0)
143 def test_area(self):
144 c = Circle(UnitVector3d(1, 1, 1), 2.0)
145 self.assertAlmostEqual(c.getArea(), 2 * math.pi)
147 def test_codec(self):
148 c = Circle(UnitVector3d.Y(), 1.0)
149 s = c.encode()
150 self.assertEqual(Circle.decode(s), c)
151 self.assertEqual(Region.decode(s), c)
153 def test_string(self):
154 c = Circle(UnitVector3d.Z(), Angle(1.0))
155 self.assertEqual(str(c), "Circle([0.0, 0.0, 1.0], 1.0)")
156 self.assertEqual(repr(c), "Circle(UnitVector3d(0.0, 0.0, 1.0), Angle(1.0))")
157 self.assertEqual(c, eval(repr(c), {"Angle": Angle, "Circle": Circle, "UnitVector3d": UnitVector3d}))
159 def test_pickle(self):
160 a = Circle(UnitVector3d(1, -1, 1), 1.0)
161 b = pickle.loads(pickle.dumps(a, pickle.HIGHEST_PROTOCOL))
162 self.assertEqual(a, b)
164 @unittest.skipIf(not yaml, "YAML module can not be imported")
165 def test_yaml(self):
166 a = Circle(UnitVector3d(1, -1, 1), 1.0)
167 b = yaml.safe_load(yaml.dump(a))
168 self.assertEqual(a, b)
171if __name__ == "__main__":
172 unittest.main()