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source: branches/3.1/sources/HeuristicLab.Routing.TSP/DistanceMatrixPathTSPEvaluator.cs @ 6755

Last change on this file since 6755 was 2, checked in by swagner, 17 years ago

Added HeuristicLab 3.0 sources from former SVN repository at revision 52

File size: 2.1 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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
22using System;
23using System.Collections.Generic;
24using System.Text;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Operators;
28using HeuristicLab.Permutation;
29
30namespace HeuristicLab.Routing.TSP {
31  public class DistanceMatrixPathTSPEvaluator : SingleObjectiveEvaluatorBase {
32    public override string Description {
33      get { return @"TODO\r\nOperator description still missing ..."; }
34    }
35
36    public DistanceMatrixPathTSPEvaluator()
37      : base() {
38      AddVariableInfo(new VariableInfo("Permutation", "Permutation representing a TSP solution in path encoding", typeof(Permutation.Permutation), VariableKind.In));
39      AddVariableInfo(new VariableInfo("DistanceMatrix", "Distance matrix containing all distances between cities", typeof(DoubleMatrixData), VariableKind.In));
40    }
41
42    protected override double Evaluate(IScope scope) {
43      double[,] distanceMatrix = GetVariableValue<DoubleMatrixData>("DistanceMatrix", scope, true).Data;
44      int[] perm = GetVariableValue<Permutation.Permutation>("Permutation", scope, false).Data;
45      double length = 0;
46
47      for (int i = 0; i < perm.Length - 1; i++)
48        length += distanceMatrix[perm[i], perm[i + 1]];
49      length += distanceMatrix[perm[perm.Length - 1], perm[0]];
50      return length;
51    }
52  }
53}
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