// $Id$
/*
* CraftBook
* Copyright (C) 2010 sk89q <http://www.sk89q.com>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.craftbook.util;
import com.sk89q.craftbook.access.BlockEntity;
import java.util.Comparator;
/**
* Used to compare ComplexBlocks based on distance to a point.
*
* @author sk89q
*/
public class DistanceComparator<T extends BlockEntity>
implements Comparator<BlockEntity> {
/**
* Origin to compare from.
*/
private Vector origin;
/**
* Construct the object.
*
* @param origin
*/
public DistanceComparator(Vector origin) {
this.origin = origin;
}
/**
* Compares two objects.
*
* @param o1
* @param o2
*
* @return
*/
public int compare(BlockEntity o1, BlockEntity o2) {
BlockEntity b1 = (BlockEntity) o1;
BlockEntity b2 = (BlockEntity) o2;
double dist1 = b1.getPosition().distance(origin);
double dist2 = b2.getPosition().distance(origin);
if (dist1 < dist2) {
return -1;
} else if (dist1 > dist2) {
return 1;
} else {
return 0;
}
}
}