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source: stable/HeuristicLab.Problems.VehicleRouting/3.4/ProblemInstances/MultiDepotVRP/MDCVRP/MDCVRPEvaluator.cs @ 13841

Last change on this file since 13841 was 12009, checked in by ascheibe, 10 years ago

#2212 updated copyright year

File size: 5.5 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Parameters;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27using HeuristicLab.Problems.VehicleRouting.Interfaces;
28using HeuristicLab.Problems.VehicleRouting.Variants;
29
30namespace HeuristicLab.Problems.VehicleRouting.ProblemInstances {
31  [Item("MDCVRPEvaluator", "Represents a multi depot CVRP evaluator.")]
32  [StorableClass]
33  public class MDCVRPEvaluator : VRPEvaluator {
34    public ILookupParameter<DoubleValue> OverloadParameter {
35      get { return (ILookupParameter<DoubleValue>)Parameters["Overload"]; }
36    }
37
38    protected override VRPEvaluation CreateTourEvaluation() {
39      return new CVRPEvaluation();
40    }
41
42    protected override void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour, IVRPEncoding solution) {
43      TourInsertionInfo tourInfo = new TourInsertionInfo(solution.GetVehicleAssignment(solution.GetTourIndex(tour)));
44      eval.InsertionInfo.AddTourInsertionInfo(tourInfo);
45      double originalQuality = eval.Quality;
46
47      IHeterogenousCapacitatedProblemInstance cvrpInstance = instance as IHeterogenousCapacitatedProblemInstance;
48
49      double delivered = 0.0;
50      double overweight = 0.0;
51      double distance = 0.0;
52
53      int tourIndex = solution.GetTourIndex(tour);
54      int vehicle = solution.GetVehicleAssignment(tourIndex);
55
56      double capacity = cvrpInstance.Capacity[vehicle];
57      for (int i = 0; i < tour.Stops.Count; i++) {
58        delivered += instance.GetDemand(tour.Stops[i]);
59      }
60
61      double spareCapacity = capacity - delivered;
62
63      //simulate a tour, start and end at depot
64      for (int i = 0; i <= tour.Stops.Count; i++) {
65        int start = 0;
66        if (i > 0)
67          start = tour.Stops[i - 1];
68        int end = 0;
69        if (i < tour.Stops.Count)
70          end = tour.Stops[i];
71
72        //drive there
73        double currentDistace = instance.GetDistance(start, end, solution);
74        distance += currentDistace;
75
76        CVRPInsertionInfo stopInfo = new CVRPInsertionInfo(start, end, spareCapacity);
77        tourInfo.AddStopInsertionInfo(stopInfo);
78      }
79
80      eval.Quality += instance.FleetUsageFactor.Value;
81      eval.Quality += instance.DistanceFactor.Value * distance;
82
83      eval.Distance += distance;
84      eval.VehicleUtilization += 1;
85
86      if (delivered > capacity) {
87        overweight = delivered - capacity;
88      }
89
90      (eval as CVRPEvaluation).Overload += overweight;
91      double penalty = overweight * cvrpInstance.OverloadPenalty.Value;
92      eval.Penalty += penalty;
93      eval.Quality += penalty;
94      tourInfo.Penalty = penalty;
95      tourInfo.Quality = eval.Quality - originalQuality;
96    }
97
98    protected override double GetTourInsertionCosts(IVRPProblemInstance instance, IVRPEncoding solution, TourInsertionInfo tourInsertionInfo, int index, int customer,
99      out bool feasible) {
100      CVRPInsertionInfo insertionInfo = tourInsertionInfo.GetStopInsertionInfo(index) as CVRPInsertionInfo;
101
102      double costs = 0;
103      feasible = tourInsertionInfo.Penalty < double.Epsilon;
104
105      IHeterogenousCapacitatedProblemInstance cvrp = instance as IHeterogenousCapacitatedProblemInstance;
106      double overloadPenalty = cvrp.OverloadPenalty.Value;
107
108      double startDistance, endDistance;
109      costs += instance.GetInsertionDistance(insertionInfo.Start, customer, insertionInfo.End, solution, out startDistance, out endDistance);
110
111      double demand = instance.GetDemand(customer);
112      if (demand > insertionInfo.SpareCapacity) {
113        feasible = false;
114
115        if (insertionInfo.SpareCapacity >= 0)
116          costs += (demand - insertionInfo.SpareCapacity) * overloadPenalty;
117        else
118          costs += demand * overloadPenalty;
119      }
120
121      return costs;
122    }
123
124    protected override void InitResultParameters() {
125      base.InitResultParameters();
126
127      OverloadParameter.ActualValue = new DoubleValue(0);
128    }
129
130    protected override void SetResultParameters(VRPEvaluation tourEvaluation) {
131      base.SetResultParameters(tourEvaluation);
132
133      OverloadParameter.ActualValue.Value = (tourEvaluation as CVRPEvaluation).Overload;
134    }
135
136    [StorableConstructor]
137    protected MDCVRPEvaluator(bool deserializing) : base(deserializing) { }
138
139    public MDCVRPEvaluator() {
140      Parameters.Add(new LookupParameter<DoubleValue>("Overload", "The overload."));
141    }
142
143    public override IDeepCloneable Clone(Cloner cloner) {
144      return new MDCVRPEvaluator(this, cloner);
145    }
146
147    protected MDCVRPEvaluator(MDCVRPEvaluator original, Cloner cloner)
148      : base(original, cloner) {
149    }
150  }
151}
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