Changeset 9750 for branches/FitnessLandscapeAnalysis/HeuristicLab.Analysis.FitnessLandscape.VRP/Manipulators/ExchangeManipulator.cs

Timestamp:

07/25/13 09:21:45 (11 years ago)

Author:

gkronber

Message:

#1591: adapted FLA branch to reference most recent version of ALGLIB (3.7.0) and VRP (3.4). Several major changes were necessary to port the implementation to the new VRP problem.

File:

• branches/FitnessLandscapeAnalysis/HeuristicLab.Analysis.FitnessLandscape.VRP/Manipulators/ExchangeManipulator.cs (modified) (4 diffs)

branches/FitnessLandscapeAnalysis/HeuristicLab.Analysis.FitnessLandscape.VRP/Manipulators/ExchangeManipulator.cs

@@ -29 +29 @@
 using HeuristicLab.Problems.VehicleRouting.Encodings;
 using HeuristicLab.Problems.VehicleRouting;
+using HeuristicLab.Problems.VehicleRouting.Interfaces;
 
 namespace HeuristicLab.Analysis.FitnessLandscape.VRP {
@@ -46 +47 @@
     }
 
-    private static bool RouteFeasible(Tour tour, DoubleArray demand, DoubleValue capacity) {
-      double routeLoad = 0;
-      for (int i = 0; i < tour.Cities.Count; i++) {
-        routeLoad += demand[tour.Cities[i]];
-      }
-
-      return routeLoad <= capacity.Value;
-    }
-
-    public static void Apply(IRandom random, PotvinEncoding individual, DoubleArray demand, DoubleValue capacity, bool allowInfeasible) {
+    public static void Apply(IRandom random, PotvinEncoding individual, IVRPProblemInstance problemInstance, bool allowInfeasible) {
       bool feasible;
 
@@ -70 +62 @@
           Tour tour2 = individual.Tours[tour2Idx];
 
-          int index1 = random.Next(tour1.Cities.Count);
-          int city1 = tour1.Cities[index1];
+          int index1 = random.Next(tour1.Stops.Count);
+          int city1 = tour1.Stops[index1];
 
-          int index2 = random.Next(tour2.Cities.Count);
-          int city2 = tour2.Cities[index2];
+          int index2 = random.Next(tour2.Stops.Count);
+          int city2 = tour2.Stops[index2];
 
           if (!allowInfeasible) {
-            bool originalFeasible =
-              RouteFeasible(tour1, demand, capacity) &&
-              RouteFeasible(tour2, demand, capacity);
+            bool originalFeasible = problemInstance.TourFeasible(tour1, individual) &&
+                                    problemInstance.TourFeasible(tour2, individual);
 
             if (originalFeasible) {
-              double routeLoad = 0;
-              for (int i = 0; i < tour1.Cities.Count; i++) {
-                if (i != index1)
-                  routeLoad += demand[tour1.Cities[i]];
+              var tmpCity1 = tour1.Stops[index1];
+              tour1.Stops.RemoveAt(index1);
+              tour1.Stops.Insert(index1, city2);
+
+              if (problemInstance.TourFeasible(tour1, individual)) {
+                var tmpCity2 = tour2.Stops[index2];
+                tour2.Stops.RemoveAt(index2);
+                tour2.Stops.Insert(index2, city1);
+
+                feasible = problemInstance.TourFeasible(tour2, individual);
+
+                if (!feasible) {
+                  // undo tour1 and tour2 changes
+                  tour2.Stops.RemoveAt(index2);
+                  tour2.Stops.Insert(index2, tmpCity2);
+
+                  tour1.Stops.RemoveAt(index1);
+                  tour1.Stops.Insert(index1, tmpCity1);
+                }
+              } else {
+                feasible = false;
+                // undo tour1 change
+                tour1.Stops.RemoveAt(index1);
+                tour1.Stops.Insert(index1, tmpCity1);
               }
-              routeLoad += demand[city2];
-
-              if (routeLoad > capacity.Value) {
-                feasible = false;
-              } else {
-                routeLoad = 0;
-                for (int i = 0; i < tour2.Cities.Count; i++) {
-                  if (i != index2)
-                    routeLoad += demand[tour2.Cities[i]];
-                }
-                routeLoad += demand[city1];
-
-                if (routeLoad > capacity.Value) {
-                  feasible = false;
-                }
-              }
-
-            }
-          }
-
-          if (feasible) {
-            tour1.Cities.RemoveAt(index1);
-            tour1.Cities.Insert(index1, city2);
-
-            tour2.Cities.RemoveAt(index2);
-            tour2.Cities.Insert(index2, city1);
+            } else feasible = false;
           }
         }
@@ -119 +105 @@
 
     protected override void Manipulate(IRandom random, PotvinEncoding individual) {
-      BoolValue useDistanceMatrix = UseDistanceMatrixParameter.ActualValue;
-      DoubleMatrix coordinates = CoordinatesParameter.ActualValue;
-      DistanceMatrix distMatrix = VRPUtilities.GetDistanceMatrix(coordinates, DistanceMatrixParameter, useDistanceMatrix);
-      DoubleArray demand = DemandParameter.ActualValue;
-      DoubleValue capacity = CapacityParameter.ActualValue;
-
       bool allowInfeasible = AllowInfeasibleSolutions.Value.Value;
-      Apply(random, individual, demand, capacity, allowInfeasible);
+      Apply(random, individual, ProblemInstance, allowInfeasible);
     }
   }