1   /* Copyright 2022-2025 Thales Alenia Space
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS 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    *   http://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  package org.orekit.bodies;
18  
19  import org.hipparchus.util.FastMath;
20  
21  /** Container for sexagesimal angle.
22   * <p>Instance of this class are guaranteed to be immutable.</p>
23   * @see GeodeticPoint
24   * @author Luc Maisonobe
25   * @since 13.0
26   */
27  public class SexagesimalAngle {
28  
29      /** Sexagesimal base. */
30      private static final double SIXTY = 60.0;
31  
32      /** Sign. */
33      private final int sign;
34  
35      /** Degree part of the angle. */
36      private final int degree;
37  
38      /** Arc-minute part of the angle. */
39      private final int arcMinute;
40  
41      /** Arc-second part of the angle. */
42      private final double arcSecond;
43  
44      /** Simple constructor.
45       * @param sign sign
46       * @param degree degree part of the angle
47       * @param arcMinute arc-minute part of the angle
48       * @param arcSecond arc-second part of the angle
49       */
50      public SexagesimalAngle(final int sign, final int degree, final int arcMinute, final double arcSecond) {
51          this.sign      = sign;
52          this.degree    = degree;
53          this.arcMinute = arcMinute;
54          this.arcSecond = arcSecond;
55      }
56  
57      /** Simple constructor.
58       * @param angle angle in radians
59       */
60      public SexagesimalAngle(final double angle) {
61          this.sign      = angle < 0 ? -1 : 1;
62          final double d = FastMath.toDegrees(FastMath.abs(angle));
63          this.degree    = (int) FastMath.floor(d);
64          final double m = (d - degree) * SIXTY;
65          this.arcMinute = (int) FastMath.floor(m);
66          this.arcSecond = (m - arcMinute) * SIXTY;
67      }
68  
69      /** Get sign.
70       * @return sign
71       */
72      public int getSign() {
73          return sign;
74      }
75  
76      /** Get degree part of the angle.
77       * @return degree part of the angle
78       */
79      public int getDegree() {
80          return degree;
81      }
82  
83      /** Get arc-minute part of the angle.
84       * @return arc-minute part of the angle
85       */
86      public int getArcMinute() {
87          return arcMinute;
88      }
89  
90      /** Get arc-second part of the angle.
91       * @return arc-second part of the angle
92       */
93      public double getArcSecond() {
94          return arcSecond;
95      }
96  
97      /** Get the corresponding angle in radians.
98       * @return angle in radians
99       */
100     public double getAngle() {
101         return FastMath.toRadians(sign * (degree + (arcMinute + arcSecond / SIXTY) / SIXTY));
102     }
103 
104 }