source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/ProblemInstances/SingleDepotVRP/SingleDepotVRPEvaluator.cs @ 4363

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Problems.VehicleRouting.Interfaces;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Core;
using HeuristicLab.Parameters;
using HeuristicLab.Data;
using HeuristicLab.Optimization;
using HeuristicLab.PluginInfrastructure;
using HeuristicLab.Problems.VehicleRouting.Variants;
using HeuristicLab.Problems.VehicleRouting.Encodings;


namespace HeuristicLab.Problems.VehicleRouting.ProblemInstances {
  [Item("SingleDepotVRPEvaluator", "Represents a single depot VRP evaluator.")]
  [StorableClass]
  public class SingleDepotVRPEvaluator: VRPEvaluator {
    protected override void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour) {
      double distance = 0.0;
      double quality = 0.0;

      //simulate a tour, start and end at depot
      for (int i = 0; i <= tour.Stops.Count; i++) {
        int start = 0;
        if (i > 0)
          start = tour.Stops[i - 1];
        int end = 0;
        if (i < tour.Stops.Count)
          end = tour.Stops[i];

        //drive there
        double currentDistace = instance.GetDistance(start, end);
        distance += currentDistace;
      }

      //Fleet usage
      quality += instance.FleetUsageFactor.Value;
      //Distance
      quality += instance.DistanceFactor.Value * distance;

      eval.Distance = distance;
      eval.VehicleUtilization = 1;

      eval.Quality = quality;
    }
    
    [StorableConstructor]
    protected SingleDepotVRPEvaluator(bool deserializing) : base(deserializing) { }

    public SingleDepotVRPEvaluator() {
    }
  }
}