1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 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 HeuristicLab.Core;
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23 | using HeuristicLab.Data;
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24 | using HeuristicLab.Parameters;
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25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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26 |
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27 | namespace HeuristicLab.Problems.TSP {
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28 | /// <summary>
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29 | /// A base class for operators which evaluate TSP solutions given in path representation using city coordinates.
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30 | /// </summary>
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31 | [Item("TSPCoordinatesPathEvaluator", "A base class for operators which evaluate TSP solutions given in path representation using city coordinates.")]
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32 | [EmptyStorableClass]
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33 | public abstract class TSPCoordinatesPathEvaluator : TSPPathEvaluator, ITSPCoordinatesPathEvaluator {
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34 | public ILookupParameter<DoubleMatrixData> CoordinatesParameter {
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35 | get { return (ILookupParameter<DoubleMatrixData>)Parameters["Coordinates"]; }
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36 | }
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37 |
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38 | protected TSPCoordinatesPathEvaluator()
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39 | : base() {
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40 | Parameters.Add(new LookupParameter<DoubleMatrixData>("Coordinates", "The x- and y-Coordinates of the cities."));
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41 | }
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42 |
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43 | protected sealed override double CalculateDistance(int a, int b) {
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44 | DoubleMatrixData coordinates = CoordinatesParameter.ActualValue;
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45 | return CalculateDistance(coordinates[a, 0], coordinates[a, 1],
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46 | coordinates[b, 0], coordinates[b, 1]);
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47 | }
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48 |
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49 | /// <summary>
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50 | /// Calculates the distance between two points.
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51 | /// </summary>
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52 | /// <param name="x1">The x-coordinate of point 1.</param>
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53 | /// <param name="y1">The y-coordinate of point 1.</param>
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54 | /// <param name="x2">The x-coordinate of point 2.</param>
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55 | /// <param name="y2">The y-coordinate of point 2.</param>
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56 | /// <returns>The calculated distance.</returns>
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57 | protected abstract double CalculateDistance(double x1, double y1, double x2, double y2);
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58 | }
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59 | }
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