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add VehicleRoutingTransportCostMatrix to easily consider time and

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distance matrices, and add an example that illustrates the matrix
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oblonski 2013-07-16 21:03:07 +02:00
parent 13a9122df1
commit 8950d49e5a
6 changed files with 370 additions and 9 deletions
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jsprit-examples/src/main/java/examples/CostMatrixExample.java Normal file
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package examples;
import java.util.Collection;
import util.Solutions;
import util.VehicleRoutingTransportCostsMatrix;
import algorithms.GreedySchrimpfFactory;
import algorithms.VehicleRoutingAlgorithms;
import analysis.SolutionPlotter;
import analysis.SolutionPrinter;
import analysis.SolutionPrinter.Print;
import basics.Service;
import basics.VehicleRoutingAlgorithm;
import basics.VehicleRoutingProblem;
import basics.VehicleRoutingProblem.FleetSize;
import basics.VehicleRoutingProblemSolution;
import basics.costs.VehicleRoutingTransportCosts;
import basics.route.Vehicle;
import basics.route.VehicleImpl;
import basics.route.VehicleType;
import basics.route.VehicleTypeImpl;
/**
* Illustrates how you can use jsprit with an already compiled distance and time matrix.
*
* @author schroeder
*
*/
public class CostMatrixExample {
/**
* @param args
*/
public static void main(String[] args) {
VehicleType type = VehicleTypeImpl.Builder.newInstance("type", 2).setCostPerDistance(1).setCostPerTime(2).build();
Vehicle vehicle = VehicleImpl.Builder.newInstance("vehicle").setLocationId("0").setType(type).build();
Service s1 = Service.Builder.newInstance("1", 1).setLocationId("1").build();
Service s2 = Service.Builder.newInstance("2", 1).setLocationId("2").build();
Service s3 = Service.Builder.newInstance("3", 1).setLocationId("3").build();
/*
* Assume the following symmetric distance-matrix
* from,to,distance
* 0,1,10.0
* 0,2,20.0
* 0,3,5.0
* 1,2,4.0
* 1,3,1.0
* 2,3,2.0
*
* and this time-matrix
* 0,1,5.0
* 0,2,10.0
* 0,3,2.5
* 1,2,2.0
* 1,3,0.5
* 2,3,1.0
*/
//define a matrix-builder building a symmetric matrix
VehicleRoutingTransportCostsMatrix.Builder costMatrixBuilder = VehicleRoutingTransportCostsMatrix.Builder.newInstance(true);
costMatrixBuilder.addTransportDistance("0", "1", 10.0);
costMatrixBuilder.addTransportDistance("0", "2", 20.0);
costMatrixBuilder.addTransportDistance("0", "3", 5.0);
costMatrixBuilder.addTransportDistance("1", "2", 4.0);
costMatrixBuilder.addTransportDistance("1", "3", 1.0);
costMatrixBuilder.addTransportDistance("2", "3", 2.0);
costMatrixBuilder.addTransportTime("0", "1", 10.0);
costMatrixBuilder.addTransportTime("0", "2", 20.0);
costMatrixBuilder.addTransportTime("0", "3", 5.0);
costMatrixBuilder.addTransportTime("1", "2", 4.0);
costMatrixBuilder.addTransportTime("1", "3", 1.0);
costMatrixBuilder.addTransportTime("2", "3", 2.0);
VehicleRoutingTransportCosts costMatrix = costMatrixBuilder.build();
VehicleRoutingProblem vrp = VehicleRoutingProblem.Builder.newInstance().setFleetSize(FleetSize.INFINITE).setRoutingCost(costMatrix)
.addVehicle(vehicle).addService(s1).addService(s2).addService(s3).build();
VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.readAndCreateAlgorithm(vrp, "input/fastAlgo.xml");
Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
SolutionPrinter.print(Solutions.getBest(solutions), Print.VERBOSE);
SolutionPlotter.plotSolutionAsPNG(vrp, Solutions.getBest(solutions), "output/yo.png", "po");
}
}