1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.ComponentModel;
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24 | using HEAL.Attic;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Data;
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28 | using HeuristicLab.Encodings.PermutationEncoding;
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29 |
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30 | namespace HeuristicLab.Problems.TravelingSalesman {
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31 | [StorableType("1a9bf60c-b6a6-4c95-8e99-5a2dec0ee892")]
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32 | public interface ITSPData : IItem {
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33 | double GetDistance(int fromCity, int toCity);
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34 | ITSPSolution GetSolution(Permutation tspTour, double tourLength);
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35 | }
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36 |
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37 | [Item("Matrix-based TSP Data", "TSP that is representd by a distance matrix.")]
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38 | [StorableType("4df58a35-679d-4414-b815-9450ae100823")]
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39 | public sealed class MatrixTSPData : Item, ITSPData, INotifyPropertyChanged {
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40 |
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41 | [Storable]
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42 | public DoubleMatrix Matrix { get; private set; }
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43 |
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44 | [Storable]
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45 | private DoubleMatrix displayCoordinates;
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46 | public DoubleMatrix DisplayCoordinates {
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47 | get => displayCoordinates;
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48 | set {
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49 | if (displayCoordinates == value) return;
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50 | displayCoordinates = value;
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51 | OnPropertyChanged(nameof(DisplayCoordinates));
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52 | }
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53 | }
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54 |
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55 | [StorableConstructor]
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56 | private MatrixTSPData(StorableConstructorFlag _) : base(_) { }
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57 | private MatrixTSPData(MatrixTSPData original, Cloner cloner) : base(original, cloner) {
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58 | Matrix = original.Matrix;
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59 | displayCoordinates = cloner.Clone(original.displayCoordinates);
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60 | }
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61 | public MatrixTSPData() {
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62 | Matrix = new DoubleMatrix(new double[0, 0], @readonly: true);
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63 | DisplayCoordinates = null;
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64 | }
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65 | public MatrixTSPData(double[,] matrix, double[,] coordinates = null) {
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66 | Matrix = new DoubleMatrix(matrix, @readonly: true);
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67 | if (coordinates != null) DisplayCoordinates = new DoubleMatrix(coordinates);
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68 | if (DisplayCoordinates != null && DisplayCoordinates.Columns != 2)
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69 | throw new ArgumentException("Argument must have exactly two columns.", nameof(coordinates));
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70 | if (DisplayCoordinates != null && DisplayCoordinates.Rows != Matrix.Rows)
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71 | throw new ArgumentException("Unequal number of rows in " + nameof(matrix) + " and " + nameof(coordinates) + ".");
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72 | }
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73 |
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74 | public ITSPSolution GetSolution(Permutation tour, double tourLength) {
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75 | return new TSPSolution(DisplayCoordinates, tour, new DoubleValue(tourLength));
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76 | }
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77 |
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78 | public override IDeepCloneable Clone(Cloner cloner) {
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79 | return new MatrixTSPData(this, cloner);
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80 | }
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81 |
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82 | public void SetMatrix(double[,] matrix, double[,] coordinates = null) {
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83 | Matrix = new DoubleMatrix(matrix, @readonly: true);
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84 | OnPropertyChanged(nameof(Matrix));
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85 | if (coordinates == null) DisplayCoordinates = null;
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86 | else DisplayCoordinates = new DoubleMatrix(coordinates);
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87 | if (DisplayCoordinates != null && DisplayCoordinates.Columns != 2)
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88 | throw new ArgumentException("Argument must have exactly two columns.", nameof(coordinates));
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89 | if (DisplayCoordinates != null && DisplayCoordinates.Rows != Matrix.Rows)
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90 | throw new ArgumentException("Unequal number of rows in " + nameof(matrix) + " and " + nameof(coordinates) + ".");
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91 | }
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92 |
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93 | public void SetMatrix(DoubleMatrix matrix, DoubleMatrix coordinates = null) {
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94 | Matrix = (DoubleMatrix)matrix.AsReadOnly();
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95 | OnPropertyChanged(nameof(Matrix));
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96 | DisplayCoordinates = (DoubleMatrix)coordinates?.Clone();
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97 | if (DisplayCoordinates != null && DisplayCoordinates.Columns != 2)
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98 | throw new ArgumentException("Argument must have exactly two columns.", nameof(coordinates));
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99 | if (DisplayCoordinates != null && DisplayCoordinates.Rows != Matrix.Rows)
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100 | throw new ArgumentException("Unequal number of rows in " + nameof(matrix) + " and " + nameof(coordinates) + ".");
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101 | }
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102 |
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103 | public double GetDistance(int fromCity, int toCity) => Matrix[fromCity, toCity];
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104 |
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105 |
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106 | public event PropertyChangedEventHandler PropertyChanged;
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107 | private void OnPropertyChanged(string property) {
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108 | PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(property));
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109 | }
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110 | }
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111 |
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112 | [Item("Coordinates-based TSP Data", "TSP that is represented by coordinates of locations.")]
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113 | [StorableType("3955d07a-d43c-4a01-9505-d2effb1ea865")]
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114 | public abstract class CoordinatesTSPData : Item, ITSPData {
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115 | [Storable]
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116 | public DoubleMatrix Coordinates { get; set; }
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117 |
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118 | [StorableConstructor]
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119 | protected CoordinatesTSPData(StorableConstructorFlag _) : base(_) { }
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120 | protected CoordinatesTSPData(CoordinatesTSPData original, Cloner cloner) : base(original, cloner) {
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121 | Coordinates = cloner.Clone(original.Coordinates);
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122 | }
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123 | protected CoordinatesTSPData() : base() {
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124 | Coordinates = new DoubleMatrix();
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125 | }
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126 | protected CoordinatesTSPData(double[,] coordinates) : base() {
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127 | if (coordinates == null) throw new ArgumentNullException(nameof(coordinates));
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128 | if (coordinates.GetLength(1) != 2) throw new ArgumentException("Argument must have exactly two columns.", nameof(coordinates));
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129 | Coordinates = new DoubleMatrix(coordinates);
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130 | }
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131 |
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132 | public double GetDistance(int fromCity, int toCity) {
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133 | return GetDistance(Coordinates[fromCity, 0], Coordinates[fromCity, 1],
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134 | Coordinates[toCity, 0], Coordinates[toCity, 1]);
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135 | }
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136 |
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137 | public abstract double GetDistance(double fromX, double fromY, double toX, double toY);
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138 |
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139 | public ITSPSolution GetSolution(Permutation tour, double tourLength) {
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140 | return new TSPSolution(Coordinates, tour, new DoubleValue(tourLength));
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141 | }
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142 | }
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143 |
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144 | [Item("Euclidean TSP Data", "TSP that is represented by coordinates in an Euclidean plane.")]
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145 | [StorableType("4bf58348-cd98-46c5-a4c0-55f486ca88b4")]
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146 | public sealed class EuclideanTSPData : CoordinatesTSPData {
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147 | public enum RoundingMode { None, Midpoint, Ceiling }
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148 |
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149 | [Storable]
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150 | public RoundingMode Rounding { get; set; }
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151 |
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152 | [StorableConstructor]
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153 | private EuclideanTSPData(StorableConstructorFlag _) : base(_) { }
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154 | private EuclideanTSPData(EuclideanTSPData original, Cloner cloner) : base(original, cloner) {
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155 | Rounding = original.Rounding;
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156 | }
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157 | public EuclideanTSPData() : base() { }
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158 | public EuclideanTSPData(double[,] coordinates) : base(coordinates) { }
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159 |
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160 | public override IDeepCloneable Clone(Cloner cloner) {
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161 | return new EuclideanTSPData(this, cloner);
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162 | }
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163 |
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164 | public override double GetDistance(double fromX, double fromY, double toX, double toY) {
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165 | var dist = Math.Sqrt((fromX - toX) * (fromX - toX) + (fromY - toY) * (fromY - toY));
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166 | switch (Rounding) {
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167 | case RoundingMode.None: return dist;
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168 | case RoundingMode.Midpoint: return Math.Round(dist);
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169 | case RoundingMode.Ceiling: return Math.Ceiling(dist);
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170 | default: throw new InvalidOperationException("Unknown rounding mode " + Rounding);
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171 | }
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172 | }
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173 | }
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174 |
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175 | [Item("Geo TSP Data", "TSP that is represented by geo coordinates.")]
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176 | [StorableType("4bf58348-cd98-46c5-a4c0-55f486ca88b4")]
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177 | public sealed class GeoTSPData : CoordinatesTSPData {
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178 | public const double PI = 3.141592;
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179 | public const double RADIUS = 6378.388;
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180 |
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181 | [StorableConstructor]
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182 | private GeoTSPData(StorableConstructorFlag _) : base(_) { }
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183 | private GeoTSPData(GeoTSPData original, Cloner cloner) : base(original, cloner) { }
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184 | public GeoTSPData() : base() { }
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185 | public GeoTSPData(double[,] coordinates) : base(coordinates) { }
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186 |
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187 | public override IDeepCloneable Clone(Cloner cloner) {
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188 | return new GeoTSPData(this, cloner);
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189 | }
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190 |
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191 | public override double GetDistance(double fromX, double fromY, double toX, double toY) {
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192 | double latitude1, longitude1, latitude2, longitude2;
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193 | double q1, q2, q3;
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194 | double length;
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195 |
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196 | latitude1 = ConvertToRadian(fromX);
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197 | longitude1 = ConvertToRadian(fromY);
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198 | latitude2 = ConvertToRadian(toX);
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199 | longitude2 = ConvertToRadian(toY);
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200 |
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201 | q1 = Math.Cos(longitude1 - longitude2);
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202 | q2 = Math.Cos(latitude1 - latitude2);
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203 | q3 = Math.Cos(latitude1 + latitude2);
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204 |
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205 | length = (int)(RADIUS * Math.Acos(0.5 * ((1.0 + q1) * q2 - (1.0 - q1) * q3)) + 1.0);
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206 | return (length);
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207 | }
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208 |
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209 | private double ConvertToRadian(double x) {
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210 | return PI * (Math.Truncate(x) + 5.0 * (x - Math.Truncate(x)) / 3.0) / 180.0;
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211 | }
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212 | }
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213 | }
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