source: trunk/sources/HeuristicLab.Problems.TravelingSalesman/3.3/Evaluators/TSPUpperEuclideanPathEvaluator.cs @ 9848

Last change on this file since 9848 was 9848, checked in by jkarder, 9 years ago

#2010: implemented TSPUpperEuclideanPathEvaluator for instances using the CEIL_2D distance measure

File size: 2.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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 HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Problems.TravelingSalesman {
28  /// <summary>
29  /// An operator which evaluates TSP solutions given in path representation using the rounded up Euclidean distance metric.
30  /// </summary>
31  [Item("TSPUpperEuclideanPathEvaluator", "An operator which evaluates TSP solutions given in path representation using the rounded up Euclidean distance metric.")]
32  [StorableClass]
33  public sealed class TSPUpperEuclideanPathEvaluator : TSPCoordinatesPathEvaluator {
34    [StorableConstructor]
35    private TSPUpperEuclideanPathEvaluator(bool deserializing) : base(deserializing) { }
36    private TSPUpperEuclideanPathEvaluator(TSPUpperEuclideanPathEvaluator original, Cloner cloner) : base(original, cloner) { }
37    public TSPUpperEuclideanPathEvaluator() : base() { }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new TSPUpperEuclideanPathEvaluator(this, cloner);
41    }
42
43    /// <summary>
44    /// Calculates the distance between two points using the rounded up Euclidean distance metric.
45    /// </summary>
46    /// <param name="x1">The x-coordinate of point 1.</param>
47    /// <param name="y1">The y-coordinate of point 1.</param>
48    /// <param name="x2">The x-coordinate of point 2.</param>
49    /// <param name="y2">The y-coordinate of point 2.</param>
50    /// <returns>The calculated distance.</returns>
51    protected override double CalculateDistance(double x1, double y1, double x2, double y2) {
52      return Math.Ceiling(Math.Sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)));
53    }
54  }
55}
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