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100 lines
4.1 KiB
Java
100 lines
4.1 KiB
Java
/*******************************************************************************
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* Copyright (C) 2014 Stefan Schroeder
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3.0 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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package jsprit.examples;
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import jsprit.analysis.toolbox.AlgorithmEventsRecorder;
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import jsprit.analysis.toolbox.AlgorithmEventsViewer;
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import jsprit.analysis.toolbox.GraphStreamViewer;
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import jsprit.analysis.toolbox.Plotter;
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import jsprit.core.algorithm.VehicleRoutingAlgorithm;
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import jsprit.core.algorithm.box.GreedySchrimpfFactory;
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import jsprit.core.problem.Location;
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import jsprit.core.problem.VehicleRoutingProblem;
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import jsprit.core.problem.job.Service;
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import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
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import jsprit.core.problem.vehicle.VehicleImpl;
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import jsprit.core.util.Coordinate;
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import jsprit.core.util.Solutions;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.Collection;
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/**
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* Created by schroeder on 27.11.14.
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*/
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public class CircleExample {
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public static Collection<Coordinate> createCoordinates(double center_x, double center_y, double radius, double step) {
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Collection<Coordinate> coords = new ArrayList<Coordinate>();
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for (double theta = 0; theta < 2 * Math.PI; theta += step) {
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double x = center_x + radius * Math.cos(theta);
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double y = center_y - radius * Math.sin(theta);
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coords.add(Coordinate.newInstance(x, y));
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}
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return coords;
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}
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public static void main(String[] args) {
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File dir = new File("output");
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// if the directory does not exist, create it
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if (!dir.exists()) {
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System.out.println("creating directory ./output");
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boolean result = dir.mkdir();
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if (result) System.out.println("./output created");
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}
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VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
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VehicleImpl v = VehicleImpl.Builder.newInstance("v")
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.setStartLocation(Location.Builder.newInstance().setCoordinate(Coordinate.newInstance(0, 0)).build()).build();
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vrpBuilder.addVehicle(v);
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double step = 2 * Math.PI / 50.;
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Collection<Coordinate> circle = createCoordinates(0, 0, 20, step);
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int id = 1;
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for (Coordinate c : circle) {
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Service s = Service.Builder.newInstance(Integer.toString(id)).setLocation(Location.Builder.newInstance().setCoordinate(c).build()).build();
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vrpBuilder.addJob(s);
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id++;
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}
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VehicleRoutingProblem vrp = vrpBuilder.build();
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//only works with latest snapshot: 1.4.3
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AlgorithmEventsRecorder eventsRecorder = new AlgorithmEventsRecorder(vrp, "output/events.dgs.gz");
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eventsRecorder.setRecordingRange(0, 50);
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VehicleRoutingAlgorithm vra = new GreedySchrimpfFactory().createAlgorithm(vrp);
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vra.setMaxIterations(50);
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//only works with latest snapshot: 1.4.3
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vra.addListener(eventsRecorder);
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VehicleRoutingProblemSolution solution = Solutions.bestOf(vra.searchSolutions());
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new Plotter(vrp, solution).plot("output/circle.png", "circleProblem");
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new GraphStreamViewer(vrp, solution).display();
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//only works with latest snapshot: 1.4.3
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AlgorithmEventsViewer viewer = new AlgorithmEventsViewer();
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viewer.setRuinDelay(16);
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viewer.setRecreationDelay(8);
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viewer.display("output/events.dgs.gz");
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}
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}
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