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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.3/VehicleRoutingProblem.cs @ 4293

Last change on this file since 4293 was 4268, checked in by svonolfe, 14 years ago

Added prins encoding (#1039)
File size: 23.2 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Drawing;
25using System.Linq;
26using HeuristicLab.Common;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Encodings.PermutationEncoding;
30using HeuristicLab.Optimization;
31using HeuristicLab.Parameters;
32using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
33using HeuristicLab.PluginInfrastructure;
34using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
35using HeuristicLab.Problems.VehicleRouting.Encodings.General;
36using HeuristicLab.Problems.VehicleRouting.Encodings.Prins;
37
38namespace HeuristicLab.Problems.VehicleRouting {
39  [Item("Vehicle Routing Problem", "Represents a Vehicle Routing Problem.")]
40  [Creatable("Problems")]
41  [StorableClass]
42  public sealed class VehicleRoutingProblem : ParameterizedNamedItem, ISingleObjectiveProblem {
43    public override Image ItemImage {
44      get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
45    }
46
47    #region Parameter Properties
48    public ValueParameter<BoolValue> MaximizationParameter {
49      get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
50    }
51    IParameter ISingleObjectiveProblem.MaximizationParameter {
52      get { return MaximizationParameter; }
53    }
54    public ValueParameter<DoubleMatrix> CoordinatesParameter {
55      get { return (ValueParameter<DoubleMatrix>)Parameters["Coordinates"]; }
56    }
57    public OptionalValueParameter<DoubleMatrix> DistanceMatrixParameter {
58      get { return (OptionalValueParameter<DoubleMatrix>)Parameters["DistanceMatrix"]; }
59    }
60    public ValueParameter<BoolValue> UseDistanceMatrixParameter {
61      get { return (ValueParameter<BoolValue>)Parameters["UseDistanceMatrix"]; }
62    }
63    public ValueParameter<IntValue> VehiclesParameter {
64      get { return (ValueParameter<IntValue>)Parameters["Vehicles"]; }
65    }
66    public ValueParameter<DoubleValue> CapacityParameter {
67      get { return (ValueParameter<DoubleValue>)Parameters["Capacity"]; }
68    }
69    public ValueParameter<DoubleArray> DemandParameter {
70      get { return (ValueParameter<DoubleArray>)Parameters["Demand"]; }
71    }
72    public ValueParameter<DoubleArray> ReadyTimeParameter {
73      get { return (ValueParameter<DoubleArray>)Parameters["ReadyTime"]; }
74    }
75    public ValueParameter<DoubleArray> DueTimeParameter {
76      get { return (ValueParameter<DoubleArray>)Parameters["DueTime"]; }
77    }
78    public ValueParameter<DoubleArray> ServiceTimeParameter {
79      get { return (ValueParameter<DoubleArray>)Parameters["ServiceTime"]; }
80    }
81    ValueParameter<IVRPCreator> SolutionCreatorParameter {
82      get { return (ValueParameter<IVRPCreator>)Parameters["SolutionCreator"]; }
83    }
84    IParameter IProblem.SolutionCreatorParameter {
85      get { return SolutionCreatorParameter; }
86    }
87    ValueParameter<IVRPEvaluator> EvaluatorParameter {
88      get { return (ValueParameter<IVRPEvaluator>)Parameters["Evaluator"]; }
89    }
90    IParameter IProblem.EvaluatorParameter {
91      get { return EvaluatorParameter; }
92    }
93    public IValueParameter<DoubleValue> FleetUsageFactor {
94      get { return (IValueParameter<DoubleValue>)Parameters["EvalFleetUsageFactor"]; }
95    }
96    public IValueParameter<DoubleValue> TimeFactor {
97      get { return (IValueParameter<DoubleValue>)Parameters["EvalTimeFactor"]; }
98    }
99    public IValueParameter<DoubleValue> DistanceFactor {
100      get { return (IValueParameter<DoubleValue>)Parameters["EvalDistanceFactor"]; }
101    }
102    public IValueParameter<DoubleValue> OverloadPenalty {
103      get { return (IValueParameter<DoubleValue>)Parameters["EvalOverloadPenalty"]; }
104    }
105    public IValueParameter<DoubleValue> TardinessPenalty {
106      get { return (IValueParameter<DoubleValue>)Parameters["EvalTardinessPenalty"]; }
107    }
108    public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
109      get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
110    }
111    IParameter ISingleObjectiveProblem.BestKnownQualityParameter {
112      get { return BestKnownQualityParameter; }
113    }
114    #endregion
115
116    #region Properties
117    public DoubleMatrix Coordinates {
118      get { return CoordinatesParameter.Value; }
119      set { CoordinatesParameter.Value = value; }
120    }
121    public DoubleMatrix DistanceMatrix {
122      get { return DistanceMatrixParameter.Value; }
123      set { DistanceMatrixParameter.Value = value; }
124    }
125    public BoolValue UseDistanceMatrix {
126      get { return UseDistanceMatrixParameter.Value; }
127      set { UseDistanceMatrixParameter.Value = value; }
128    }
129    public IntValue Vehicles {
130      get { return VehiclesParameter.Value; }
131      set { VehiclesParameter.Value = value; }
132    }
133    public DoubleValue Capacity {
134      get { return CapacityParameter.Value; }
135      set { CapacityParameter.Value = value; }
136    }
137    public DoubleArray Demand {
138      get { return DemandParameter.Value; }
139      set { DemandParameter.Value = value; }
140    }
141    public DoubleArray ReadyTime {
142      get { return ReadyTimeParameter.Value; }
143      set { ReadyTimeParameter.Value = value; }
144    }
145    public DoubleArray DueTime {
146      get { return DueTimeParameter.Value; }
147      set { DueTimeParameter.Value = value; }
148    }
149    public DoubleArray ServiceTime {
150      get { return ServiceTimeParameter.Value; }
151      set { ServiceTimeParameter.Value = value; }
152    }
153    public DoubleValue BestKnownQuality {
154      get { return BestKnownQualityParameter.Value; }
155      set { BestKnownQualityParameter.Value = value; }
156    }
157    IVRPCreator SolutionCreator {
158      get { return SolutionCreatorParameter.Value; }
159      set { SolutionCreatorParameter.Value = value; }
160    }
161    ISolutionCreator IProblem.SolutionCreator {
162      get { return SolutionCreatorParameter.Value; }
163    }
164    IVRPEvaluator Evaluator {
165      get { return EvaluatorParameter.Value; }
166      set { EvaluatorParameter.Value = value; }
167    }
168    ISingleObjectiveEvaluator ISingleObjectiveProblem.Evaluator {
169      get { return EvaluatorParameter.Value; }
170    }
171    IEvaluator IProblem.Evaluator {
172      get { return EvaluatorParameter.Value; }
173    }
174    public IEnumerable<IOperator> Operators {
175      get { return operators; }
176    }
177    private BestVRPSolutionAnalyzer BestVRPSolutionAnalyzer {
178      get { return operators.OfType<BestVRPSolutionAnalyzer>().FirstOrDefault(); }
179    }
180    #endregion
181
182    [Storable]
183    private List<IOperator> operators;
184
185    [StorableConstructor]
186    private VehicleRoutingProblem(bool deserializing) : base(deserializing) { }
187    public VehicleRoutingProblem()
188      : base() {
189      IVRPCreator creator = new RandomCreator();
190      IVRPEvaluator evaluator = new VRPEvaluator();
191
192      Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Vehicle Routing Problem is a minimization problem.", new BoolValue(false)));
193      Parameters.Add(new ValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the cities.", new DoubleMatrix()));
194      Parameters.Add(new OptionalValueParameter<DoubleMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
195      Parameters.Add(new ValueParameter<BoolValue>("UseDistanceMatrix", "True if a distance matrix should be calculated and used for evaluation, otherwise false.", new BoolValue(true)));
196      Parameters.Add(new ValueParameter<IntValue>("Vehicles", "The number of vehicles.", new IntValue(0)));
197      Parameters.Add(new ValueParameter<DoubleValue>("Capacity", "The capacity of each vehicle.", new DoubleValue(0)));
198      Parameters.Add(new ValueParameter<DoubleArray>("Demand", "The demand of each customer.", new DoubleArray()));
199      Parameters.Add(new ValueParameter<DoubleArray>("ReadyTime", "The ready time of each customer.", new DoubleArray()));
200      Parameters.Add(new ValueParameter<DoubleArray>("DueTime", "The due time of each customer.", new DoubleArray()));
201      Parameters.Add(new ValueParameter<DoubleArray>("ServiceTime", "The service time of each customer.", new DoubleArray()));
202      Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this VRP instance."));
203      Parameters.Add(new ValueParameter<DoubleValue>("EvalFleetUsageFactor", "The fleet usage factor considered in the evaluation.", new DoubleValue(100)));
204      Parameters.Add(new ValueParameter<DoubleValue>("EvalTimeFactor", "The time factor considered in the evaluation.", new DoubleValue(0)));
205      Parameters.Add(new ValueParameter<DoubleValue>("EvalDistanceFactor", "The distance factor considered in the evaluation.", new DoubleValue(1)));
206      Parameters.Add(new ValueParameter<DoubleValue>("EvalOverloadPenalty", "The overload penalty considered in the evaluation.", new DoubleValue(100)));
207      Parameters.Add(new ValueParameter<DoubleValue>("EvalTardinessPenalty", "The tardiness penalty considered in the evaluation.", new DoubleValue(100)));
208
209      Parameters.Add(new ValueParameter<IVRPCreator>("SolutionCreator", "The operator which should be used to create new VRP solutions.", creator));
210      Parameters.Add(new ValueParameter<IVRPEvaluator>("Evaluator", "The operator which should be used to evaluate VRP solutions.", evaluator));
211
212      creator.VRPToursParameter.ActualName = "VRPTours";
213      evaluator.QualityParameter.ActualName = "VRPQuality";
214
215      InitializeRandomVRPInstance();
216
217      ParameterizeSolutionCreator();
218      ParameterizeEvaluator();
219
220      InitializeOperators();
221      AttachEventHandlers();
222    }
223
224    public override IDeepCloneable Clone(Cloner cloner) {
225      VehicleRoutingProblem clone = (VehicleRoutingProblem)base.Clone(cloner);
226      clone.operators = operators.Select(x => (IOperator)cloner.Clone(x)).ToList();
227      clone.DistanceMatrixParameter.Value = DistanceMatrixParameter.Value;
228      clone.AttachEventHandlers();
229      return clone;
230    }
231
232    #region Events
233    public event EventHandler SolutionCreatorChanged;
234    private void OnSolutionCreatorChanged() {
235      EventHandler handler = SolutionCreatorChanged;
236      if (handler != null) handler(this, EventArgs.Empty);
237    }
238    public event EventHandler EvaluatorChanged;
239    private void OnEvaluatorChanged() {
240      EventHandler handler = EvaluatorChanged;
241      if (handler != null) handler(this, EventArgs.Empty);
242    }
243    public event EventHandler OperatorsChanged;
244    private void OnOperatorsChanged() {
245      EventHandler handler = OperatorsChanged;
246      if (handler != null) handler(this, EventArgs.Empty);
247    }
248    public event EventHandler Reset;
249    private void OnReset() {
250      EventHandler handler = Reset;
251      if (handler != null) handler(this, EventArgs.Empty);
252    }
253    void VehiclesValue_ValueChanged(object sender, EventArgs e) {
254      ParameterizeSolutionCreator();
255    }
256    private void CoordinatesParameter_ValueChanged(object sender, EventArgs e) {
257      Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
258      Coordinates.Reset += new EventHandler(Coordinates_Reset);
259      ParameterizeSolutionCreator();
260      ClearDistanceMatrix();
261    }
262    private void Coordinates_ItemChanged(object sender, EventArgs<int, int> e) {
263      ClearDistanceMatrix();
264    }
265    private void Coordinates_Reset(object sender, EventArgs e) {
266      ParameterizeSolutionCreator();
267      ClearDistanceMatrix();
268    }
269    private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
270      ParameterizeSolutionCreator();
271      ParameterizeEvaluator();
272      ParameterizeAnalyzer();
273      ParameterizeOperators();
274      OnSolutionCreatorChanged();
275    }
276    private void SolutionCreator_PermutationParameter_ActualNameChanged(object sender, EventArgs e) {
277      ParameterizeEvaluator();
278      ParameterizeAnalyzer();
279      ParameterizeOperators();
280    }
281    private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
282      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
283      ParameterizeEvaluator();
284      UpdateMoveEvaluators();
285      ParameterizeAnalyzer();
286      OnEvaluatorChanged();
287    }
288    private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
289      ParameterizeAnalyzer();
290    }
291    private void TranslocationMoveParameter_ActualNameChanged(object sender, EventArgs e) {
292      string name = ((ILookupParameter<TranslocationMove>)sender).ActualName;
293      foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>()) {
294        op.TranslocationMoveParameter.ActualName = name;
295      }
296    }
297    #endregion
298
299    #region Helpers
300    [StorableHook(HookType.AfterDeserialization)]
301    private void AfterDeserializationHook() {
302      AttachEventHandlers();
303    }
304
305    private void AttachEventHandlers() {
306      CoordinatesParameter.ValueChanged += new EventHandler(CoordinatesParameter_ValueChanged);
307      Vehicles.ValueChanged += new EventHandler(VehiclesValue_ValueChanged);
308      Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
309      Coordinates.Reset += new EventHandler(Coordinates_Reset);
310      SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
311      EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
312      Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
313    }
314    private void InitializeOperators() {
315      operators = new List<IOperator>();
316      operators.Add(new BestVRPSolutionAnalyzer());
317      ParameterizeAnalyzer();
318      operators.AddRange(ApplicationManager.Manager.GetInstances<IVRPOperator>().Cast<IOperator>());
319      ParameterizeOperators();
320      UpdateMoveEvaluators();
321      InitializeMoveGenerators();
322    }
323    private void InitializeMoveGenerators() {
324      foreach (IAlbaTranslocationMoveOperator op in Operators.OfType<IAlbaTranslocationMoveOperator>()) {
325        if (op is IMoveGenerator) {
326          op.TranslocationMoveParameter.ActualNameChanged += new EventHandler(TranslocationMoveParameter_ActualNameChanged);
327        }
328      }
329
330    }
331    private void UpdateMoveEvaluators() {
332      ParameterizeOperators();
333      OnOperatorsChanged();
334    }
335    private void ParameterizeSolutionCreator() {
336      SolutionCreator.VehiclesParameter.ActualName = VehiclesParameter.Name;
337      SolutionCreator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
338      Evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
339      Evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
340      SolutionCreator.CapacityParameter.ActualName = CapacityParameter.Name;
341      SolutionCreator.DemandParameter.ActualName = DemandParameter.Name;
342      SolutionCreator.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
343      SolutionCreator.DueTimeParameter.ActualName = DueTimeParameter.Name;
344      SolutionCreator.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
345    }
346    private void ParameterizeEvaluator() {
347      Evaluator.VRPToursParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
348      Evaluator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
349      Evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
350      Evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
351      Evaluator.VehiclesParameter.ActualName = VehiclesParameter.Name;
352      Evaluator.CapacityParameter.ActualName = CapacityParameter.Name;
353      Evaluator.DemandParameter.ActualName = DemandParameter.Name;
354      Evaluator.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
355      Evaluator.DueTimeParameter.ActualName = DueTimeParameter.Name;
356      Evaluator.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
357      Evaluator.FleetUsageFactor.ActualName = FleetUsageFactor.Name;
358      Evaluator.TimeFactor.ActualName = TimeFactor.Name;
359      Evaluator.DistanceFactor.ActualName = DistanceFactor.Name;
360      Evaluator.OverloadPenalty.ActualName = OverloadPenalty.Name;
361      Evaluator.TardinessPenalty.ActualName = TardinessPenalty.Name;
362    }
363    private void ParameterizeAnalyzer() {
364      BestVRPSolutionAnalyzer.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
365      BestVRPSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
366      BestVRPSolutionAnalyzer.DistanceParameter.ActualName = Evaluator.DistanceParameter.ActualName;
367      BestVRPSolutionAnalyzer.OverloadParameter.ActualName = Evaluator.OverloadParameter.ActualName;
368      BestVRPSolutionAnalyzer.TardinessParameter.ActualName = Evaluator.TardinessParameter.ActualName;
369      BestVRPSolutionAnalyzer.VRPToursParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
370      BestVRPSolutionAnalyzer.ResultsParameter.ActualName = "Results";
371    }
372    private void ParameterizeOperators() {
373      foreach (IVRPOperator op in Operators.OfType<IVRPOperator>()) {
374        if(op.CoordinatesParameter != null) op.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
375        if(op.DistanceMatrixParameter != null) op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
376        if(op.UseDistanceMatrixParameter != null) op.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
377        if(op.VehiclesParameter != null) op.VehiclesParameter.ActualName = VehiclesParameter.Name;
378        if(op.CapacityParameter != null) op.CapacityParameter.ActualName = CapacityParameter.Name;
379        if(op.DemandParameter != null) op.DemandParameter.ActualName = DemandParameter.Name;
380        if(op.ReadyTimeParameter != null) op.ReadyTimeParameter.ActualName = ReadyTimeParameter.Name;
381        if(op.DueTimeParameter != null) op.DueTimeParameter.ActualName = DueTimeParameter.Name;
382        if(op.ServiceTimeParameter != null) op.ServiceTimeParameter.ActualName = ServiceTimeParameter.Name;
383      }
384     
385      foreach (IVRPMoveOperator op in Operators.OfType<IVRPMoveOperator>()) {
386        op.VRPToursParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
387      }
388
389      foreach (IPrinsOperator op in Operators.OfType<IPrinsOperator>()) {
390        op.FleetUsageFactor.ActualName = FleetUsageFactor.Name;
391        op.TimeFactor.ActualName = TimeFactor.Name;
392        op.DistanceFactor.ActualName = DistanceFactor.Name;
393        op.OverloadPenalty.ActualName = OverloadPenalty.Name;
394        op.TardinessPenalty.ActualName = TardinessPenalty.Name;
395      }
396
397      foreach (IVRPMoveEvaluator op in Operators.OfType<IVRPMoveEvaluator>()) {
398        op.FleetUsageFactor.ActualName = FleetUsageFactor.Name;
399        op.TimeFactor.ActualName = TimeFactor.Name;
400        op.DistanceFactor.ActualName = DistanceFactor.Name;
401        op.OverloadPenalty.ActualName = OverloadPenalty.Name;
402        op.TardinessPenalty.ActualName = TardinessPenalty.Name;
403        op.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
404        op.VRPToursParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
405      }
406      string translocationMove = Operators.OfType<IMoveGenerator>().OfType<IAlbaTranslocationMoveOperator>().First().TranslocationMoveParameter.ActualName;
407      foreach (IAlbaTranslocationMoveOperator op in Operators.OfType<IAlbaTranslocationMoveOperator>())
408        op.TranslocationMoveParameter.ActualName = translocationMove;
409
410      foreach (IVRPCrossover op in Operators.OfType<IVRPCrossover>()) {
411        op.ParentsParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
412        op.ChildParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
413      }
414
415      foreach (IVRPManipulator op in Operators.OfType<IVRPManipulator>()) {
416        op.VRPToursParameter.ActualName = SolutionCreator.VRPToursParameter.ActualName;
417      }
418    }
419    private void ClearDistanceMatrix() {
420      DistanceMatrixParameter.Value = null;
421    }
422    #endregion
423
424    public void ImportFromSolomon(string solomonFileName) {
425      SolomonParser parser = new SolomonParser(solomonFileName);
426      parser.Parse();
427
428      this.Name = parser.ProblemName;
429
430      Coordinates = new DoubleMatrix(parser.Coordinates);
431      Vehicles.Value = parser.Vehicles;
432      Capacity.Value = parser.Capacity;
433      Demand = new DoubleArray(parser.Demands);
434      ReadyTime = new DoubleArray(parser.Readytimes);
435      DueTime = new DoubleArray(parser.Duetimes);
436      ServiceTime = new DoubleArray(parser.Servicetimes);
437
438      OnReset();
439    }
440
441    public void ImportFromTSPLib(string tspFileName) {
442      TSPLIBParser parser = new TSPLIBParser(tspFileName);
443      parser.Parse();
444
445      this.Name = parser.Name;
446
447      int problemSize = parser.Demands.Length;
448
449      Coordinates = new DoubleMatrix(parser.Vertices);
450      Vehicles.Value = problemSize - 1;
451      Capacity.Value = parser.Capacity;
452      Demand = new DoubleArray(parser.Demands);
453      ReadyTime = new DoubleArray(problemSize);
454      DueTime = new DoubleArray(problemSize);
455      ServiceTime = new DoubleArray(problemSize);
456
457      for (int i = 0; i < problemSize; i++) {
458        ReadyTime[i] = 0;
459        DueTime[i] = int.MaxValue;
460        ServiceTime[i] = 0;
461      }
462
463      if (parser.Depot != 1)
464        throw new Exception("Invalid depot specification");
465
466      if (parser.WeightType != TSPLIBParser.TSPLIBEdgeWeightType.EUC_2D)
467        throw new Exception("Invalid weight type");
468
469      OnReset();
470    }
471
472    private void InitializeRandomVRPInstance() {
473      System.Random rand = new System.Random();
474
475      int cities = 100;
476
477      Coordinates = new DoubleMatrix(cities + 1, 2);
478      Demand = new DoubleArray(cities + 1);
479      DueTime = new DoubleArray(cities + 1);
480      ReadyTime = new DoubleArray(cities + 1);
481      ServiceTime = new DoubleArray(cities + 1);
482
483      Vehicles.Value = 100;
484      Capacity.Value = 200;
485
486      for (int i = 0; i <= cities; i++) {
487        Coordinates[i, 0] = rand.Next(0, 100);
488        Coordinates[i, 1] = rand.Next(0, 100);
489
490        if (i == 0) {
491          Demand[i] = 0;
492          DueTime[i] = Int16.MaxValue;
493          ReadyTime[i] = 0;
494          ServiceTime[i] = 0;
495        } else {
496          Demand[i] = rand.Next(10, 50);
497          DueTime[i] = rand.Next((int)Math.Ceiling(VRPUtilities.CalculateDistance(0, i, Coordinates)), 1200);
498          ReadyTime[i] = DueTime[i] - rand.Next(0, 100);
499          ServiceTime[i] = 90;
500        }
501      }
502    }
503  }
504}
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