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90 lines
3.5 KiB
90 lines
3.5 KiB
/*
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* Copyright 2005 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.geometry;
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public strictfp class S2LatLngTest extends GeometryTestCase {
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public void testBasic() {
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S2LatLng llRad = S2LatLng.fromRadians(S2.M_PI_4, S2.M_PI_2);
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assertTrue(llRad.lat().radians() == S2.M_PI_4);
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assertTrue(llRad.lng().radians() == S2.M_PI_2);
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assertTrue(llRad.isValid());
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S2LatLng llDeg = S2LatLng.fromDegrees(45, 90);
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assertEquals(llDeg, llRad);
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assertTrue(llDeg.isValid());
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assertTrue(!S2LatLng.fromDegrees(-91, 0).isValid());
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assertTrue(!S2LatLng.fromDegrees(0, 181).isValid());
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S2LatLng bad = S2LatLng.fromDegrees(120, 200);
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assertTrue(!bad.isValid());
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S2LatLng better = bad.normalized();
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assertTrue(better.isValid());
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assertEquals(better.lat(), S1Angle.degrees(90));
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assertDoubleNear(better.lng().radians(), S1Angle.degrees(-160).radians());
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bad = S2LatLng.fromDegrees(-100, -360);
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assertTrue(!bad.isValid());
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better = bad.normalized();
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assertTrue(better.isValid());
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assertEquals(better.lat(), S1Angle.degrees(-90));
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assertDoubleNear(better.lng().radians(), 0);
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assertTrue((S2LatLng.fromDegrees(10, 20).add(S2LatLng.fromDegrees(20, 30))).approxEquals(
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S2LatLng.fromDegrees(30, 50)));
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assertTrue((S2LatLng.fromDegrees(10, 20).sub(S2LatLng.fromDegrees(20, 30))).approxEquals(
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S2LatLng.fromDegrees(-10, -10)));
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assertTrue((S2LatLng.fromDegrees(10, 20).mul(0.5)).approxEquals(S2LatLng.fromDegrees(5, 10)));
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}
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public void testConversion() {
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// Test special cases: poles, "date line"
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assertDoubleNear(
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new S2LatLng(S2LatLng.fromDegrees(90.0, 65.0).toPoint()).lat().degrees(), 90.0);
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assertEquals(
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new S2LatLng(S2LatLng.fromRadians(-S2.M_PI_2, 1).toPoint()).lat().radians(), -S2.M_PI_2);
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assertDoubleNear(
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Math.abs(new S2LatLng(S2LatLng.fromDegrees(12.2, 180.0).toPoint()).lng().degrees()), 180.0);
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assertEquals(
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Math.abs(new S2LatLng(S2LatLng.fromRadians(0.1, -S2.M_PI).toPoint()).lng().radians()),
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S2.M_PI);
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// Test a bunch of random points.
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for (int i = 0; i < 100000; ++i) {
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S2Point p = randomPoint();
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assertTrue(S2.approxEquals(p, new S2LatLng(p).toPoint()));
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}
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// Test generation from E5
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S2LatLng test = S2LatLng.fromE5(123456, 98765);
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assertDoubleNear(test.lat().degrees(), 1.23456);
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assertDoubleNear(test.lng().degrees(), 0.98765);
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}
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public void testDistance() {
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assertEquals(
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S2LatLng.fromDegrees(90, 0).getDistance(S2LatLng.fromDegrees(90, 0)).radians(), 0.0);
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assertDoubleNear(
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S2LatLng.fromDegrees(-37, 25).getDistance(S2LatLng.fromDegrees(-66, -155)).degrees(), 77,
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1e-13);
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assertDoubleNear(
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S2LatLng.fromDegrees(0, 165).getDistance(S2LatLng.fromDegrees(0, -80)).degrees(), 115,
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1e-13);
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assertDoubleNear(
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S2LatLng.fromDegrees(47, -127).getDistance(S2LatLng.fromDegrees(-47, 53)).degrees(), 180,
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2e-6);
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}
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}
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