1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 /*
19 * This is not the original file distributed by the Apache Software Foundation
20 * It has been modified by the Hipparchus project
21 */
22 package org.hipparchus.geometry.euclidean.twod;
23
24 import org.hipparchus.util.FastMath;
25 import org.junit.Assert;
26 import org.junit.Test;
27
28 public class SegmentTest {
29
30 @Test
31 public void testDistance() {
32 Vector2D start = new Vector2D(2, 2);
33 Vector2D end = new Vector2D(-2, -2);
34 Segment segment = new Segment(start, end, new Line(start, end, 1.0e-10));
35
36 // distance to center of segment
37 Assert.assertEquals(FastMath.sqrt(2), segment.distance(new Vector2D(1, -1)), 1.0e-10);
38
39 // distance a point on segment
40 Assert.assertEquals(FastMath.sin(Math.PI / 4.0), segment.distance(new Vector2D(0, -1)), 1.0e-10);
41
42 // distance to end point
43 Assert.assertEquals(FastMath.sqrt(8), segment.distance(new Vector2D(0, 4)), 1.0e-10);
44
45 // distance to start point
46 Assert.assertEquals(FastMath.sqrt(8), segment.distance(new Vector2D(0, -4)), 1.0e-10);
47 }
48 }