1 /* Copyright 2002-2024 CS GROUP 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.utils; 18 19 import java.io.Serializable; 20 21 /** Container for Love numbers. 22 * @author Luc Maisonobe 23 * @since 6.1 24 */ 25 public class LoveNumbers implements Serializable { 26 27 /** Serializable UID. */ 28 private static final long serialVersionUID = 20131014L; 29 30 /** Real part of the nominal Love numbers. */ 31 private final double[][] real; 32 33 /** Imaginary part of the nominal Love numbers. */ 34 private final double[][] imaginary; 35 36 /** Time-dependent part of the Love numbers. */ 37 private final double[][] plus; 38 39 /** Simple constructor. 40 * @param real real part of the nominal Love numbers 41 * @param imaginary imaginary part of the nominal Love numbers 42 * @param plus time-dependent part of the Love numbers 43 */ 44 public LoveNumbers(final double[][] real, final double[][] imaginary, final double[][] plus) { 45 this.real = copyIrregular(real); 46 this.imaginary = copyIrregular(imaginary); 47 this.plus = copyIrregular(plus); 48 } 49 50 /** Copy irregular-shape array. 51 * @param source source array 52 * @return copied array 53 */ 54 private double[][] copyIrregular(final double[][] source) { 55 final double[][] copy = new double[source.length][]; 56 for (int i = 0; i < source.length; ++i) { 57 copy[i] = source[i].clone(); 58 } 59 return copy; 60 } 61 62 /** Get the size of the arrays. 63 * @return size of the arrays (i.e. max degree for Love numbers + 1) 64 */ 65 public int getSize() { 66 return real.length; 67 } 68 69 /** Get the real part of a nominal Love numbers. 70 * @param n degree of the Love number (must be less than {@link #getSize()}) 71 * @param m order of the Love number (must be less than {@code n}) 72 * @return real part of k<sub>n,m</sub> 73 */ 74 public final double getReal(final int n, final int m) { 75 return real[n][m]; 76 } 77 78 /** Get the imaginary part of a nominal Love numbers. 79 * @param n degree of the Love number (must be less than {@link #getSize()}) 80 * @param m order of the Love number (must be less than {@code n}) 81 * @return imaginary part of k<sub>n,m</sub> 82 */ 83 public final double getImaginary(final int n, final int m) { 84 return imaginary[n][m]; 85 } 86 87 /** Get the real part of a nominal Love numbers. 88 * @param n degree of the Love number (must be less than {@link #getSize()}) 89 * @param m order of the Love number (must be less than {@code n}) 90 * @return k<sub>n,m</sub><sup>+</sup> 91 */ 92 public final double getPlus(final int n, final int m) { 93 return plus[n][m]; 94 } 95 96 } 97