1  #region License Information


2  /* HeuristicLab


3  * Copyright (C) 20022010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)


4  *


5  * This file is part of HeuristicLab.


6  *


7  * HeuristicLab is free software: you can redistribute it and/or modify


8  * it under the terms of the GNU General Public License as published by


9  * the Free Software Foundation, either version 3 of the License, or


10  * (at your option) any later version.


11  *


12  * HeuristicLab is distributed in the hope that it will be useful,


13  * but WITHOUT ANY WARRANTY; without even the implied warranty of


14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the


15  * GNU General Public License for more details.


16  *


17  * You should have received a copy of the GNU General Public License


18  * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.


19  */


20  #endregion


21 


22  using System;


23  using HeuristicLab.Analysis;


24  using HeuristicLab.Common;


25  using HeuristicLab.Core;


26  using HeuristicLab.Data;


27  using HeuristicLab.Encodings.PermutationEncoding;


28  using HeuristicLab.Parameters;


29  using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;


30 


31  namespace HeuristicLab.Problems.TravelingSalesman {


32  /// <summary>


33  /// An operator for analyzing the frequency of alleles in solutions of Traveling Salesman Problems given in path representation.


34  /// </summary>


35  [Item("TSPAlleleFrequencyAnalyzer", "An operator for analyzing the frequency of alleles in solutions of Traveling Salesman Problems given in path representation.")]


36  [StorableClass]


37  public sealed class TSPAlleleFrequencyAnalyzer : AlleleFrequencyAnalyzer<Permutation> {


38  public LookupParameter<DoubleMatrix> CoordinatesParameter {


39  get { return (LookupParameter<DoubleMatrix>)Parameters["Coordinates"]; }


40  }


41 


42  [StorableConstructor]


43  private TSPAlleleFrequencyAnalyzer(bool deserializing) : base(deserializing) { }


44  private TSPAlleleFrequencyAnalyzer(TSPAlleleFrequencyAnalyzer original, Cloner cloner) : base(original, cloner) { }


45  public TSPAlleleFrequencyAnalyzer()


46  : base() {


47  Parameters.Add(new LookupParameter<DoubleMatrix>("Coordinates", "The x and ycoordinates of the cities."));


48  }


49 


50  public override IDeepCloneable Clone(Cloner cloner) {


51  return new TSPAlleleFrequencyAnalyzer(this, cloner);


52  }


53 


54  protected override Allele[] CalculateAlleles(Permutation solution) {


55  Allele[] alleles = new Allele[solution.Length];


56  DoubleMatrix coords = CoordinatesParameter.ActualValue;


57 


58  for (int i = 0; i < solution.Length  1; i++)


59  alleles[i] = CreateAllele(solution[i], solution[i + 1], coords);


60  alleles[alleles.Length  1] = CreateAllele(solution[solution.Length  1], solution[0], coords);


61 


62  return alleles;


63  }


64 


65  private Allele CreateAllele(int source, int target, DoubleMatrix coords) {


66  if (source > target) {


67  int h = source;


68  source = target;


69  target = h;


70  }


71 


72  return new Allele(source.ToString() + "" + target.ToString(),


73  CalculateLength(coords[source, 0], coords[source, 1], coords[target, 0], coords[target, 1]));


74  }


75 


76  private double CalculateLength(double x1, double y1, double x2, double y2) {


77  return Math.Sqrt((x1  x2) * (x1  x2) + (y1  y2) * (y1  y2));


78  }


79  }


80  }

