com.l2jserver.service.game.world.filter.impl.RangePointFilter.java Source code

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Here is the source code for com.l2jserver.service.game.world.filter.impl.RangePointFilter.java

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/*
 * This file is part of l2jserver2 <l2jserver2.com>.
 *
 * l2jserver2 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
 * (at your option) any later version.
 *
 * l2jserver2 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 l2jserver2.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.service.game.world.filter.impl;

import org.apache.commons.math.util.FastMath;

import com.google.common.base.Preconditions;
import com.l2jserver.model.world.PositionableObject;
import com.l2jserver.service.game.world.filter.WorldObjectFilter;
import com.l2jserver.util.geometry.Point3D;

/**
 * Filter objects that are in the <tt>range</tt> of <tt>coordinate</tt>
 * 
 * @author <a href="http://www.rogiel.com">Rogiel</a>
 */
public class RangePointFilter implements WorldObjectFilter<PositionableObject> {
    /**
     * The coordinate point
     */
    private final Point3D point;
    /**
     * The desired maximum distance of the object
     */
    private final double range;

    /**
     * Creates a new instance
     * 
     * @param point
     *            the point to start the range search
     * @param range
     *            the desired maximum distance of the object
     */
    public RangePointFilter(final Point3D point, final int range) {
        Preconditions.checkNotNull(point, "point");
        Preconditions.checkState(range >= 0, "range < 0");
        this.point = point;
        this.range = range;
    }

    @Override
    public boolean accept(PositionableObject other) {
        if (other == null)
            return false;
        final double dx = FastMath.abs(point.getX() - other.getPoint().getX());
        final double dy = FastMath.abs(point.getY() - other.getPoint().getY());
        final double dz = FastMath.abs(point.getZ() - other.getPoint().getZ());

        if (dx > range)
            return false;
        if (dy > range)
            return false;
        if (dz > range)
            return false;

        return true;
    }
}