Coverage for tests/test_UnitVector3d.py: 20%
65 statements
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« prev ^ index » next coverage.py v7.5.0, created at 2024-05-02 03:12 -0700
1# This file is part of sphgeom.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (http://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This software is dual licensed under the GNU General Public License and also
10# under a 3-clause BSD license. Recipients may choose which of these licenses
11# to use; please see the files gpl-3.0.txt and/or bsd_license.txt,
12# respectively. If you choose the GPL option then the following text applies
13# (but note that there is still no warranty even if you opt for BSD instead):
14#
15# This program is free software: you can redistribute it and/or modify
16# it under the terms of the GNU General Public License as published by
17# the Free Software Foundation, either version 3 of the License, or
18# (at your option) any later version.
19#
20# This program is distributed in the hope that it will be useful,
21# but WITHOUT ANY WARRANTY; without even the implied warranty of
22# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23# GNU General Public License for more details.
24#
25# You should have received a copy of the GNU General Public License
26# along with this program. If not, see <http://www.gnu.org/licenses/>.
28import math
29import pickle
30import unittest
32from lsst.sphgeom import Angle, LonLat, UnitVector3d, Vector3d
35class UnitVector3dTestCase(unittest.TestCase):
36 """Test 3D UnitVector."""
38 def testConstruction(self):
39 v = Vector3d(1, 1, 1)
40 u = UnitVector3d.orthogonalTo(v)
41 self.assertAlmostEqual(u.dot(v), 0.0, places=15)
42 a = UnitVector3d(1, 1, 1)
43 self.assertEqual(a, UnitVector3d(Vector3d(1, 1, 1)))
44 self.assertAlmostEqual(a.x(), math.sqrt(3.0) / 3.0, places=15)
45 self.assertAlmostEqual(a.y(), math.sqrt(3.0) / 3.0, places=15)
46 self.assertAlmostEqual(a.z(), math.sqrt(3.0) / 3.0, places=15)
47 b = UnitVector3d(Angle.fromDegrees(45), Angle.fromDegrees(45))
48 self.assertEqual(b, UnitVector3d(LonLat.fromDegrees(45, 45)))
49 self.assertAlmostEqual(b.x(), 0.5, places=15)
50 self.assertAlmostEqual(b.y(), 0.5, places=15)
51 self.assertAlmostEqual(b.z(), 0.5 * math.sqrt(2.0), places=15)
52 c = UnitVector3d.northFrom(b)
53 d = UnitVector3d(LonLat.fromDegrees(225, 45))
54 self.assertAlmostEqual(c.x(), d.x(), places=15)
55 self.assertAlmostEqual(c.y(), d.y(), places=15)
56 self.assertAlmostEqual(c.z(), d.z(), places=15)
58 def testComparison(self):
59 self.assertEqual(UnitVector3d.X(), UnitVector3d.X())
60 self.assertNotEqual(UnitVector3d.Y(), UnitVector3d.Z())
62 def testAccess(self):
63 v = UnitVector3d.X()
64 self.assertEqual(len(v), 3)
65 self.assertEqual(v[0], 1)
66 self.assertEqual(v[1], 0)
67 self.assertEqual(v[2], 0)
68 self.assertEqual(v[-3], 1)
69 self.assertEqual(v[-2], 0)
70 self.assertEqual(v[-1], 0)
71 with self.assertRaises(IndexError):
72 v[-4]
73 with self.assertRaises(IndexError):
74 v[3]
76 def testDot(self):
77 self.assertEqual(UnitVector3d.X().dot(UnitVector3d.Z()), 0)
79 def testCross(self):
80 self.assertEqual(UnitVector3d.X().cross(UnitVector3d.Y()), Vector3d(0, 0, 1))
81 self.assertEqual(UnitVector3d.X().robustCross(UnitVector3d.Y()), Vector3d(0, 0, 2))
83 def testArithmeticOperators(self):
84 self.assertEqual(-UnitVector3d.X(), UnitVector3d(-1, 0, 0))
85 self.assertEqual(UnitVector3d.X() - UnitVector3d.X(), Vector3d(0, 0, 0))
86 self.assertEqual(UnitVector3d.X() + UnitVector3d(1, 0, 0), UnitVector3d.X() * 2)
87 self.assertEqual(UnitVector3d.Y() - Vector3d(0, 0.5, 0), UnitVector3d.Y() / 2)
88 self.assertEqual(UnitVector3d.Z().cwiseProduct(Vector3d(2, 3, 4)), Vector3d(0, 0, 4))
90 def testRotation(self):
91 v = UnitVector3d.Y().rotatedAround(UnitVector3d.X(), Angle(0.5 * math.pi))
92 self.assertAlmostEqual(v.x(), 0.0, places=15)
93 self.assertAlmostEqual(v.y(), 0.0, places=15)
94 self.assertAlmostEqual(v.z(), 1.0, places=15)
96 def testString(self):
97 v = UnitVector3d.X()
98 self.assertEqual(str(v), "[1.0, 0.0, 0.0]")
99 self.assertEqual(repr(v), "UnitVector3d(1.0, 0.0, 0.0)")
100 self.assertEqual(v, eval(repr(v), {"UnitVector3d": UnitVector3d}))
102 def testPickle(self):
103 v = UnitVector3d(1, 1, 1)
104 w = pickle.loads(pickle.dumps(v, pickle.HIGHEST_PROTOCOL))
105 self.assertEqual(v, w)
108if __name__ == "__main__":
109 unittest.main()