SquaredMapShape.java

/*
 * Copyright or © or Copr. Amaury Carrade (2014 - 2016)
 *
 * http://amaury.carrade.eu
 *
 * This software is governed by the CeCILL-B license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL-B
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL-B license and that you accept its terms.
 */
package eu.carrade.amaury.UHCReloaded.borders.shapes;

import org.bukkit.Location;
import org.bukkit.World;


public class SquaredMapShape implements MapShapeDescriptor
{
    /**
     * Returns true if the given location is inside the map.
     *
     * @param location The location to check.
     * @param diameter The diameter of the map.
     * @param center   The center of the map.
     *
     * @return {@code true} if the given location is inside the map.
     */
    @Override
    public boolean isInsideBorder(final Location location, final Double diameter, final Location center)
    {
        Integer halfMapSize = (int) Math.floor(diameter / 2);
        Integer x = location.getBlockX();
        Integer z = location.getBlockZ();

        Integer limitXInf = center.clone().add(-halfMapSize, 0, 0).getBlockX();
        Integer limitXSup = center.clone().add(halfMapSize, 0, 0).getBlockX();
        Integer limitZInf = center.clone().add(0, 0, -halfMapSize).getBlockZ();
        Integer limitZSup = center.clone().add(0, 0, halfMapSize).getBlockZ();

        return !(x < limitXInf || x > limitXSup || z < limitZInf || z > limitZSup);
    }

    /**
     * Returns the distance between the given location and the border with this diameter.
     *
     * @param location The distance will be calculated between this location and the closest point of the border.
     * @param diameter The diameter of the border.
     * @param center   The center of the border.
     *
     * @return The distance between the given {@code location} and the closest point of the border.<br />
     * {@code -1} if the location is inside the border.
     */
    @Override
    public double getDistanceToBorder(final Location location, final Double diameter, final Location center)
    {
        // The nether/end are not limited.
        if (!location.getWorld().getEnvironment().equals(World.Environment.NORMAL))
        {
            return -1;
        }

        if (isInsideBorder(location, diameter, center))
        {
            return -1;
        }

        Integer halfMapSize = (int) Math.floor(diameter / 2);
        Integer x = location.getBlockX();
        Integer z = location.getBlockZ();

        Integer limitXInf = center.clone().add(-halfMapSize, 0, 0).getBlockX();
        Integer limitXSup = center.clone().add(halfMapSize, 0, 0).getBlockX();
        Integer limitZInf = center.clone().add(0, 0, -halfMapSize).getBlockZ();
        Integer limitZSup = center.clone().add(0, 0, halfMapSize).getBlockZ();

        if (x > limitXSup && z < limitZSup && z > limitZInf)       // East of the border
        {
            return Math.abs(x - limitXSup);
        }
        else if (x < limitXInf && z < limitZSup && z > limitZInf)  // West of the border
        {
            return Math.abs(x - limitXInf);
        }
        else if (z > limitZSup && x < limitXSup && x > limitXInf)  // South of the border
        {
            return Math.abs(z - limitZSup);
        }
        else if (z < limitZInf && x < limitXSup && x > limitXInf)  // North of the border
        {
            return Math.abs(z - limitZInf);
        }
        else if (x > limitXSup && z < limitZInf)  // North-East
        {
            return (int) location.distance(new Location(location.getWorld(), limitXSup, location.getBlockY(), limitZInf));
        }
        else if (x > limitXSup && z > limitZSup)  // South-East
        {
            return (int) location.distance(new Location(location.getWorld(), limitXSup, location.getBlockY(), limitZSup));
        }
        else if (x < limitXInf && z > limitZSup)  // South-West
        {
            return (int) location.distance(new Location(location.getWorld(), limitXInf, location.getBlockY(), limitZSup));
        }
        else if (x < limitXInf && z < limitZInf)  // North-West
        {
            return (int) location.distance(new Location(location.getWorld(), limitXInf, location.getBlockY(), limitZInf));
        }
        else
        {
            return -1; // Should never happen.
        }
    }
}