de.tud.kom.p2psim.impl.application.ido.moveModels.RandomMoveModel.java Source code

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Here is the source code for de.tud.kom.p2psim.impl.application.ido.moveModels.RandomMoveModel.java

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/*
 * Copyright (c) 2005-2011 KOM - Multimedia Communications Lab
 *
 * This file is part of PeerfactSim.KOM.
 * 
 * PeerfactSim.KOM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * 
 * PeerfactSim.KOM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package de.tud.kom.p2psim.impl.application.ido.moveModels;

import java.awt.Point;

import org.apache.commons.math.random.RandomGenerator;

import de.tud.kom.p2psim.impl.application.ido.IDOApplication;
import de.tud.kom.p2psim.impl.simengine.Simulator;

/**
 * This move model generates a random new position, derived from the old
 * position and an offset, which is limited by the move speed.
 * 
 * @author Julius Rueckert <peerfact@kom.tu-darmstadt.de>
 * @version 06/01/2011
 * 
 */
public class RandomMoveModel implements IMoveModel {
    public int moveSpeedLimit;

    public int worldDimensionX;

    public int worldDimensionY;

    public RandomMoveModel() {
        this(10, 200, 200);
    }

    /**
     * The portal component.
     */
    public IPortalComponent portal;

    public RandomMoveModel(int moveSpeedLimit, int worldDimensionX, int worldDimensionY) {
        this.moveSpeedLimit = moveSpeedLimit;
        this.worldDimensionX = worldDimensionX;
        this.worldDimensionY = worldDimensionY;
    }

    @Override
    public Point getNextPosition(IDOApplication app) {
        RandomGenerator r = Simulator.getRandom();

        Point pos = app.getPlayerPosition();

        Point newPos;

        if (portal != null) {
            Point position = portal.portal(app.getPlayerPosition(), app, worldDimensionX, worldDimensionY);
            // if a portal is used.
            if (position != null) {
                return position;
            }
        }

        do {
            newPos = new Point(pos.x + (r.nextInt(2 * moveSpeedLimit + 1) - moveSpeedLimit),
                    pos.y + (r.nextInt(2 * moveSpeedLimit + 1) - moveSpeedLimit));

        } while (newPos.x < 0 || newPos.x > worldDimensionX || newPos.y < 0 || newPos.y > worldDimensionY);
        setMoveVector(app, newPos);
        return newPos;
    }

    private void setMoveVector(IDOApplication app, Point nextPosition) {
        app.setCurrentMoveVector(nextPosition.x - app.getPlayerPosition().x,
                nextPosition.y - app.getPlayerPosition().y);
    }

    public void setMoveSpeedLimit(int moveSpeedLimit) {
        this.moveSpeedLimit = moveSpeedLimit;
    }

    public void setWorldDimensionX(int worldDimensionX) {
        this.worldDimensionX = worldDimensionX;
    }

    public void setWorldDimensionY(int worldDimensionY) {
        this.worldDimensionY = worldDimensionY;
    }

    public void setPortal(IPortalComponent portal) {
        this.portal = portal;
    }
}