1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2014 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.IO;
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24 | using System.Linq;
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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.IntegerVectorEncoding;
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29 | using HeuristicLab.Optimization;
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30 | using HeuristicLab.Parameters;
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31 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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32 | using HeuristicLab.Problems.Instances;
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33 | using HeuristicLab.Problems.Instances.Types;
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34 |
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35 | namespace HeuristicLab.Problems.Orienteering {
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36 |
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37 | [Item("Orienteering Problem", "Represents a single objective Orienteering Problem.")]
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38 | [Creatable("Problems")]
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39 | [StorableClass]
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40 | public sealed class OrienteeringProblem
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41 | : SingleObjectiveHeuristicOptimizationProblem<IOrienteeringEvaluator, IOrienteeringSolutionCreator>,
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42 | IStorableContent, IProblemInstanceConsumer<OPData>, IProblemInstanceConsumer<TSPData>, IProblemInstanceConsumer<CVRPData> {
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43 |
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44 | public string Filename { get; set; }
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45 |
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46 | #region Parameter Properties
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47 | public OptionalValueParameter<DoubleMatrix> CoordinatesParameter {
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48 | get { return (OptionalValueParameter<DoubleMatrix>)Parameters["Coordinates"]; }
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49 | }
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50 | public ValueParameter<DistanceMatrix> DistanceMatrixParameter {
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51 | get { return (ValueParameter<DistanceMatrix>)Parameters["DistanceMatrix"]; }
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52 | }
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53 |
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54 | public ValueParameter<IntValue> StartingPointParameter {
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55 | get { return (ValueParameter<IntValue>)Parameters["StartingPoint"]; }
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56 | }
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57 | public ValueParameter<IntValue> TerminalPointParameter {
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58 | get { return (ValueParameter<IntValue>)Parameters["TerminalPoint"]; }
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59 | }
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60 | public ValueParameter<DoubleValue> MaximumDistanceParameter {
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61 | get { return (ValueParameter<DoubleValue>)Parameters["MaximumDistance"]; }
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62 | }
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63 | public ValueParameter<DoubleArray> ScoresParameter {
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64 | get { return (ValueParameter<DoubleArray>)Parameters["Scores"]; }
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65 | }
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66 | public ValueParameter<DoubleValue> PointVisitingCostsParameter {
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67 | get { return (ValueParameter<DoubleValue>)Parameters["PointVisitingCosts"]; }
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68 | }
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69 |
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70 | public OptionalValueParameter<IntegerVector> BestKnownSolutionParameter {
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71 | get { return (OptionalValueParameter<IntegerVector>)Parameters["BestKnownSolution"]; }
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72 | }
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73 | #endregion
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74 |
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75 | #region Properties
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76 | public DoubleMatrix Coordinates {
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77 | get { return CoordinatesParameter.Value; }
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78 | set { CoordinatesParameter.Value = value; }
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79 | }
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80 | public DistanceMatrix DistanceMatrix {
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81 | get { return DistanceMatrixParameter.Value; }
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82 | set { DistanceMatrixParameter.Value = value; }
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83 | }
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84 | public IntValue StartingPoint {
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85 | get { return StartingPointParameter.Value; }
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86 | set { StartingPointParameter.Value = value; }
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87 | }
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88 | public IntValue TerminalPoint {
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89 | get { return TerminalPointParameter.Value; }
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90 | set { TerminalPointParameter.Value = value; }
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91 | }
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92 | public DoubleValue MaximumDistance {
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93 | get { return MaximumDistanceParameter.Value; }
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94 | set { MaximumDistanceParameter.Value = value; }
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95 | }
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96 | public DoubleArray Scores {
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97 | get { return ScoresParameter.Value; }
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98 | set { ScoresParameter.Value = value; }
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99 | }
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100 | public DoubleValue PointVisitingCosts {
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101 | get { return PointVisitingCostsParameter.Value; }
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102 | set { PointVisitingCostsParameter.Value = value; }
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103 | }
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104 | public IntegerVector BestKnownSolution {
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105 | get { return BestKnownSolutionParameter.Value; }
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106 | set { BestKnownSolutionParameter.Value = value; }
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107 | }
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108 | private BestOrienteeringSolutionAnalyser BestOrienteeringSolutionAnalyser {
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109 | get { return Operators.OfType<BestOrienteeringSolutionAnalyser>().SingleOrDefault(); }
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110 | }
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111 | #endregion
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112 |
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113 | [StorableConstructor]
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114 | private OrienteeringProblem(bool deserializing)
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115 | : base(deserializing) {
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116 | }
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117 | private OrienteeringProblem(OrienteeringProblem original, Cloner cloner)
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118 | : base(original, cloner) {
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119 | RegisterEventHandlers();
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120 | }
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121 | public override IDeepCloneable Clone(Cloner cloner) {
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122 | return new OrienteeringProblem(this, cloner);
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123 | }
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124 | public OrienteeringProblem()
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125 | : base(new OrienteeringEvaluator(), new GreedyOrienteeringTourCreator()) {
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126 | Parameters.Add(new OptionalValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the points."));
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127 | Parameters.Add(new ValueParameter<DistanceMatrix>("DistanceMatrix", "The matrix which contains the distances between the points."));
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128 | Parameters.Add(new ValueParameter<IntValue>("StartingPoint", "Index of the starting point.", new IntValue(0)));
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129 | Parameters.Add(new ValueParameter<IntValue>("TerminalPoint", "Index of the ending point.", new IntValue(0)));
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130 | Parameters.Add(new ValueParameter<DoubleValue>("MaximumDistance", "The maximum distance constraint for a Orienteering solution."));
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131 | Parameters.Add(new ValueParameter<DoubleArray>("Scores", "The scores of the points."));
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132 | Parameters.Add(new ValueParameter<DoubleValue>("PointVisitingCosts", "The costs for visiting a point."));
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133 | Parameters.Add(new OptionalValueParameter<IntegerVector>("BestKnownSolution", "The best known solution of this Orienteering instance."));
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134 |
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135 | Maximization.Value = true;
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136 | MaximizationParameter.Hidden = true;
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137 |
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138 | SolutionCreator.IntegerVectorParameter.ActualName = "OrienteeringSolution";
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139 |
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140 | InitializeInitialOrienteeringInstance();
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141 |
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142 | ParameterizeSolutionCreator();
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143 | ParameterizeEvaluator();
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144 |
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145 | InitializeOperators();
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146 | RegisterEventHandlers();
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147 | }
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148 |
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149 | #region Events
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150 | protected override void OnSolutionCreatorChanged() {
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151 | base.OnSolutionCreatorChanged();
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152 | SolutionCreator.IntegerVectorParameter.ActualNameChanged += SolutionCreator_IntegerVectorParameter_ActualNameChanged;
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153 | ParameterizeSolutionCreator();
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154 | ParameterizeEvaluator();
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155 | ParameterizeAnalyzer();
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156 | ParameterizeOperators();
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157 | }
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158 | protected override void OnEvaluatorChanged() {
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159 | base.OnEvaluatorChanged();
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160 | ParameterizeEvaluator();
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161 | ParameterizeAnalyzer();
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162 | }
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163 | private void SolutionCreator_IntegerVectorParameter_ActualNameChanged(object sender, EventArgs e) {
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164 | ParameterizeEvaluator();
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165 | ParameterizeAnalyzer();
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166 | ParameterizeOperators();
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167 | }
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168 | private void CoordinatesParameter_ValueChanged(object sender, EventArgs e) {
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169 | if (Coordinates != null) {
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170 | Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(CoordinatesValue_ItemChanged);
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171 | Coordinates.Reset += new EventHandler(CoordinatesValue_Reset);
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172 | }
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173 | ParameterizeSolutionCreator();
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174 | UpdateDistanceMatrix();
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175 | }
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176 | private void CoordinatesValue_ItemChanged(object sender, EventArgs<int, int> e) {
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177 | UpdateDistanceMatrix();
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178 | }
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179 | private void CoordinatesValue_Reset(object sender, EventArgs e) {
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180 | ParameterizeSolutionCreator();
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181 | UpdateDistanceMatrix();
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182 | }
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183 | private void StartingPointParameter_ValueChanged(object sender, EventArgs e) {
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184 | ParameterizeEvaluator();
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185 | ParameterizeAnalyzer();
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186 | }
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187 |
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188 | private void TerminalPointParameter_ValueChanged(object sender, EventArgs e) {
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189 | ParameterizeEvaluator();
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190 | ParameterizeAnalyzer();
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191 | }
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192 | private void MaximumDistanceParameter_ValueChanged(object sender, EventArgs e) {
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193 | ParameterizeEvaluator();
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194 | ParameterizeAnalyzer();
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195 | }
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196 | private void ScoresParameter_ValueChanged(object sender, EventArgs e) {
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197 | ParameterizeEvaluator();
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198 | ParameterizeAnalyzer();
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199 | ParameterizeSolutionCreator();
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200 |
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201 | ScoresParameter.Value.Reset += new EventHandler(ScoresValue_Reset);
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202 | }
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203 | private void ScoresValue_Reset(object sender, EventArgs e) {
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204 | ParameterizeSolutionCreator();
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205 | }
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206 | private void PointVisitingCostsParameter_ValueChanged(object sender, EventArgs e) {
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207 | ParameterizeEvaluator();
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208 | ParameterizeAnalyzer();
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209 | }
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210 | #endregion
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211 |
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212 | #region Helpers
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213 | [StorableHook(HookType.AfterDeserialization)]
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214 | private void AfterDeserialization() {
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215 | RegisterEventHandlers();
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216 | }
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217 |
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218 | private void RegisterEventHandlers() {
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219 | SolutionCreator.IntegerVectorParameter.ActualNameChanged += SolutionCreator_IntegerVectorParameter_ActualNameChanged;
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220 |
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221 | CoordinatesParameter.ValueChanged += CoordinatesParameter_ValueChanged;
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222 | if (CoordinatesParameter.Value != null) {
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223 | CoordinatesParameter.Value.ItemChanged += CoordinatesValue_ItemChanged;
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224 | CoordinatesParameter.Value.Reset += CoordinatesValue_Reset;
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225 | }
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226 |
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227 | StartingPointParameter.ValueChanged += StartingPointParameter_ValueChanged;
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228 | TerminalPointParameter.ValueChanged += TerminalPointParameter_ValueChanged;
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229 | MaximumDistanceParameter.ValueChanged += MaximumDistanceParameter_ValueChanged;
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230 |
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231 | ScoresParameter.ValueChanged += ScoresParameter_ValueChanged;
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232 | ScoresParameter.Value.Reset += ScoresValue_Reset;
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233 | PointVisitingCostsParameter.ValueChanged += PointVisitingCostsParameter_ValueChanged;
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234 | }
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235 |
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236 | private void ParameterizeSolutionCreator() {
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237 | SolutionCreator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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238 | SolutionCreator.ScoresParameter.ActualName = ScoresParameter.Name;
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239 | SolutionCreator.MaximumDistanceParameter.ActualName = MaximumDistanceParameter.Name;
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240 | SolutionCreator.StartingPointParameter.ActualName = StartingPointParameter.Name;
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241 | SolutionCreator.TerminalPointParameter.ActualName = TerminalPointParameter.Name;
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242 | SolutionCreator.PointVisitingCostsParameter.ActualName = PointVisitingCostsParameter.Name;
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243 | }
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244 | private void ParameterizeEvaluator() {
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245 | Evaluator.IntegerVectorParameter.ActualName = SolutionCreator.IntegerVectorParameter.ActualName;
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246 | Evaluator.ScoresParameter.ActualName = ScoresParameter.Name;
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247 | Evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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248 | Evaluator.MaximumDistanceParameter.ActualName = MaximumDistanceParameter.Name;
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249 | Evaluator.PointVisitingCostsParameter.ActualName = PointVisitingCostsParameter.Name;
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250 | }
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251 | private void ParameterizeAnalyzer() {
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252 | if (BestOrienteeringSolutionAnalyser != null) {
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253 | BestOrienteeringSolutionAnalyser.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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254 |
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255 | BestOrienteeringSolutionAnalyser.IntegerVector.ActualName = SolutionCreator.IntegerVectorParameter.ActualName;
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256 | BestOrienteeringSolutionAnalyser.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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257 | BestOrienteeringSolutionAnalyser.ScoresParameter.ActualName = ScoresParameter.Name;
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258 |
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259 | BestOrienteeringSolutionAnalyser.ResultsParameter.ActualName = "Results";
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260 | BestOrienteeringSolutionAnalyser.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
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261 | BestOrienteeringSolutionAnalyser.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
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262 | }
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263 | }
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264 | private void InitializeOperators() {
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265 | Operators.Add(new BestOrienteeringSolutionAnalyser());
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266 | ParameterizeAnalyzer();
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267 |
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268 | Operators.Add(new OrienteeringLocalImprovementOperator());
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269 | Operators.Add(new OrienteeringShakingOperator());
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270 | ParameterizeOperators();
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271 | }
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272 | private void ParameterizeOperators() {
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273 | foreach (var op in Operators.OfType<OrienteeringLocalImprovementOperator>()) {
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274 | op.IntegerVectorParameter.ActualName = SolutionCreator.IntegerVectorParameter.ActualName;
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275 | op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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276 | op.ScoresParameter.ActualName = ScoresParameter.Name;
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277 | op.MaximumDistanceParameter.ActualName = MaximumDistanceParameter.Name;
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278 | op.StartingPointParameter.ActualName = StartingPointParameter.Name;
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279 | op.TerminalPointParameter.ActualName = TerminalPointParameter.Name;
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280 | op.PointVisitingCostsParameter.ActualName = PointVisitingCostsParameter.Name;
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281 | }
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282 | foreach (var op in Operators.OfType<OrienteeringShakingOperator>()) {
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283 | op.IntegerVectorParameter.ActualName = SolutionCreator.IntegerVectorParameter.ActualName;
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284 | op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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285 | op.ScoresParameter.ActualName = ScoresParameter.Name;
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286 | op.MaximumDistanceParameter.ActualName = MaximumDistanceParameter.Name;
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287 | op.StartingPointParameter.ActualName = StartingPointParameter.Name;
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288 | op.TerminalPointParameter.ActualName = TerminalPointParameter.Name;
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289 | op.PointVisitingCostsParameter.ActualName = PointVisitingCostsParameter.Name;
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290 | }
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291 | }
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292 | #endregion
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293 |
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294 | private DistanceMatrix CalculateDistanceMatrix(double[,] coordinates) {
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295 | var distances = DistanceHelper.GetDistanceMatrix(DistanceMeasure.Euclidean, coordinates, null, coordinates.GetLength(0));
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296 |
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297 | return new DistanceMatrix(distances);
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298 | }
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299 | private void UpdateDistanceMatrix() {
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300 | if (Coordinates == null) {
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301 | DistanceMatrix = new DistanceMatrix(0, 0);
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302 | return;
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303 | }
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304 |
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305 | var coordinates = Coordinates;
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306 | int dimension = coordinates.Rows;
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307 | var distances = new double[dimension, dimension];
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308 | for (int i = 0; i < dimension - 1; i++) {
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309 | for (int j = i + 1; j < dimension; j++) {
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310 | double x1 = coordinates[i, 0];
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311 | double y1 = coordinates[i, 1];
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312 | double x2 = coordinates[j, 0];
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313 | double y2 = coordinates[j, 1];
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314 | distances[i, j] = Math.Sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
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315 | distances[j, i] = distances[i, j];
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316 | }
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317 | }
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318 | DistanceMatrix = new DistanceMatrix(distances);
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319 | }
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320 |
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321 | private void InitializeInitialOrienteeringInstance() {
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322 | var coordinates = new double[21, 2] {
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323 | { 4.60, 7.10 }, { 5.70, 11.40 }, { 4.40, 12.30 }, { 2.80, 14.30 }, { 3.20, 10.30 },
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324 | { 3.50, 9.80 }, { 4.40, 8.40 }, { 7.80, 11.00 }, { 8.80, 9.80 }, { 7.70, 8.20 },
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325 | { 6.30, 7.90 }, { 5.40, 8.20 }, { 5.80, 6.80 }, { 6.70, 5.80 }, { 13.80, 13.10 },
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326 | { 14.10, 14.20 }, { 11.20, 13.60 }, { 9.70, 16.40 }, { 9.50, 18.80 }, { 4.70, 16.80 },
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327 | { 5.00, 5.60 }
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328 | };
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329 | Coordinates = new DoubleMatrix(coordinates);
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330 | DistanceMatrix = CalculateDistanceMatrix(coordinates);
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331 |
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332 | StartingPoint.Value = 0;
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333 | TerminalPoint.Value = 20;
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334 | MaximumDistance.Value = 30;
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335 |
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336 | Scores = new DoubleArray(new double[21] { 0, 20, 20, 30, 15, 15, 10, 20, 20, 20, 15, 10, 10, 25, 40, 40, 30, 30, 50, 30, 0 });
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337 | }
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338 |
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339 | public void Load(OPData data) {
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340 | if (data.Coordinates == null && data.Distances == null)
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341 | throw new InvalidDataException("The given instance specifies no coordinates or distance matrix!");
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342 | if (data.Coordinates != null && data.Coordinates.GetLength(1) != 2)
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343 | throw new InvalidDataException("The coordinates of the given instance are not in the right format, there need to be one row for each customer and two columns for the x and y coordinates.");
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344 |
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345 | // Clear old solutions
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346 | BestKnownQuality = null;
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347 | BestKnownSolution = null;
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348 |
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349 | Name = data.Name;
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350 | Description = data.Description;
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351 |
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352 | Coordinates = data.Coordinates != null ? new DoubleMatrix(data.Coordinates) : null;
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353 | if (data.Distances != null)
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354 | DistanceMatrix = new DistanceMatrix(data.Distances);
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355 | else
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356 | DistanceMatrix = new DistanceMatrix(data.GetDistanceMatrix());
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357 |
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358 | StartingPoint = new IntValue(data.StartingPoint);
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359 | TerminalPoint = new IntValue(data.TerminalPoint);
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360 |
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361 | PointVisitingCosts = new DoubleValue(data.PointVisitingCosts);
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362 | MaximumDistance = new DoubleValue(data.MaximumDistance);
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363 | Scores = new DoubleArray(data.Scores);
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364 | }
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365 |
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366 | public void Load(TSPData data) {
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367 | if (data.Coordinates == null && data.Distances == null)
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368 | throw new InvalidDataException("The given instance specifies no coordinates or distance matrix!");
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369 | if (data.Coordinates != null && data.Coordinates.GetLength(1) != 2)
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370 | throw new InvalidDataException("The coordinates of the given instance are not in the right format, there need to be one row for each customer and two columns for the x and y coordinates.");
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371 |
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372 | // Clear old solutions
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373 | BestKnownQuality = null;
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374 | BestKnownSolution = null;
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375 |
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376 | Name = data.Name;
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377 | Description = data.Description;
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378 |
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379 | Coordinates = data.Coordinates != null ? new DoubleMatrix(data.Coordinates) : null;
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380 | if (data.Distances != null)
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381 | DistanceMatrix = new DistanceMatrix(data.Distances);
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382 | else
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383 | DistanceMatrix = new DistanceMatrix(data.GetDistanceMatrix());
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384 |
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385 | StartingPoint = new IntValue(0); // First city is interpreted as start point
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386 | TerminalPoint = new IntValue(data.Dimension - 1); // Last city is interpreted als end point
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387 |
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388 | PointVisitingCosts = new DoubleValue(0);
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389 | MaximumDistance = new DoubleValue(DistanceMatrix.Average() * 5.0); // distance from start to end first to last city is interpreted as maximum distance
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390 | Scores = new DoubleArray(Enumerable.Repeat(1.0, data.Dimension).ToArray()); // all scores are 1
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391 | }
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392 |
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393 | public void Load(CVRPData data) {
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394 | if (data.Coordinates == null && data.Distances == null)
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395 | throw new InvalidDataException("The given instance specifies no coordinates or distance matrix!");
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396 | if (data.Coordinates != null && data.Coordinates.GetLength(1) != 2)
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397 | throw new InvalidDataException("The coordinates of the given instance are not in the right format, there need to be one row for each customer and two columns for the x and y coordinates.");
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398 |
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399 | // Clear old solutions
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400 | BestKnownQuality = null;
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401 | BestKnownSolution = null;
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402 |
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403 | Name = data.Name;
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404 | Description = data.Description;
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405 |
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406 | Coordinates = data.Coordinates != null ? new DoubleMatrix(data.Coordinates) : null;
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407 | DistanceMatrix = data.Distances != null
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408 | ? new DistanceMatrix(data.Distances)
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409 | : CalculateDistanceMatrix(data.Coordinates);
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410 |
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411 | StartingPoint = new IntValue(0); // Depot is interpreted as start point
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412 | TerminalPoint = new IntValue(0); // Depot is interpreted als end point
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413 |
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414 | PointVisitingCosts = new DoubleValue(0);
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415 | MaximumDistance = new DoubleValue(data.Capacity * 2); // capacity is interpreted as max distance
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416 | Scores = new DoubleArray(data.Demands); // demands are interpreted as scores
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417 | }
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418 | }
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419 | } |
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