[4623] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[14185] | 3 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[4623] | 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 HeuristicLab.Analysis;
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[4722] | 24 | using HeuristicLab.Common;
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[4623] | 25 | using HeuristicLab.Core;
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| 26 | using HeuristicLab.Data;
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| 27 | using HeuristicLab.Encodings.PermutationEncoding;
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| 28 | using HeuristicLab.Parameters;
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| 29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 30 |
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| 31 | namespace HeuristicLab.Problems.TravelingSalesman {
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| 32 | /// <summary>
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| 33 | /// An operator for analyzing the frequency of alleles in solutions of Traveling Salesman Problems given in path representation.
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| 34 | /// </summary>
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| 35 | [Item("TSPAlleleFrequencyAnalyzer", "An operator for analyzing the frequency of alleles in solutions of Traveling Salesman Problems given in path representation.")]
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| 36 | [StorableClass]
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| 37 | public sealed class TSPAlleleFrequencyAnalyzer : AlleleFrequencyAnalyzer<Permutation> {
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| 38 | public LookupParameter<DoubleMatrix> CoordinatesParameter {
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| 39 | get { return (LookupParameter<DoubleMatrix>)Parameters["Coordinates"]; }
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| 40 | }
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[4866] | 41 | public LookupParameter<DistanceMatrix> DistanceMatrixParameter {
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| 42 | get { return (LookupParameter<DistanceMatrix>)Parameters["DistanceMatrix"]; }
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| 43 | }
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[4623] | 44 |
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[4704] | 45 | [StorableConstructor]
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| 46 | private TSPAlleleFrequencyAnalyzer(bool deserializing) : base(deserializing) { }
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[4722] | 47 | private TSPAlleleFrequencyAnalyzer(TSPAlleleFrequencyAnalyzer original, Cloner cloner) : base(original, cloner) { }
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[4623] | 48 | public TSPAlleleFrequencyAnalyzer()
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| 49 | : base() {
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[4849] | 50 | Parameters.Add(new LookupParameter<DoubleMatrix>("Coordinates", "The x- and y-coordinates of the cities."));
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[4866] | 51 | Parameters.Add(new LookupParameter<DistanceMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
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[4623] | 52 | }
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| 53 |
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[4722] | 54 | public override IDeepCloneable Clone(Cloner cloner) {
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| 55 | return new TSPAlleleFrequencyAnalyzer(this, cloner);
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| 56 | }
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| 57 |
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[4623] | 58 | protected override Allele[] CalculateAlleles(Permutation solution) {
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| 59 | Allele[] alleles = new Allele[solution.Length];
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| 60 | DoubleMatrix coords = CoordinatesParameter.ActualValue;
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[4866] | 61 | DistanceMatrix dm = DistanceMatrixParameter.ActualValue;
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[7621] | 62 | if (dm == null && coords == null) throw new InvalidOperationException("Neither a distance matrix nor coordinates were given.");
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[4866] | 63 | int source, target, h;
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| 64 | double impact;
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[4623] | 65 |
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[4866] | 66 | for (int i = 0; i < solution.Length - 1; i++) {
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| 67 | source = solution[i];
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| 68 | target = solution[i + 1];
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| 69 | if (source > target) { h = source; source = target; target = h; }
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| 70 | impact = dm != null ? dm[source, target] : CalculateLength(coords[source, 0], coords[source, 1], coords[target, 0], coords[target, 1]);
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| 71 | alleles[i] = new Allele(source.ToString() + "-" + target.ToString(), impact);
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| 72 | }
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| 73 | source = solution[solution.Length - 1];
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| 74 | target = solution[0];
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| 75 | if (source > target) { h = source; source = target; target = h; }
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| 76 | impact = dm != null ? dm[source, target] : CalculateLength(coords[source, 0], coords[source, 1], coords[target, 0], coords[target, 1]);
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| 77 | alleles[alleles.Length - 1] = new Allele(source.ToString() + "-" + target.ToString(), impact);
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[4623] | 78 |
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| 79 | return alleles;
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| 80 | }
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| 81 |
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| 82 | private double CalculateLength(double x1, double y1, double x2, double y2) {
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| 83 | return Math.Sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
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| 84 | }
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| 85 | }
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| 86 | }
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