/*
 * WorldEdit, a Minecraft world manipulation toolkit
 * Copyright (C) sk89q <http://www.sk89q.com>
 * Copyright (C) WorldEdit team and contributors
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.sk89q.worldedit.math;

import java.util.Comparator;

import static com.sk89q.worldedit.math.BlockVector2.COMPARING_GRID_ARRANGEMENT;

/**
 * Sort block positions by region, then chunk.
 */
public class RegionOptimizedChunkComparator {

    private static final Comparator<BlockVector2> CHUNK_COMPARATOR =
        Comparator.comparing((BlockVector2 chunkPos) -> chunkPos.shr(5), COMPARING_GRID_ARRANGEMENT)
            .thenComparing(COMPARING_GRID_ARRANGEMENT);

    public static final Comparator<BlockVector3> INSTANCE
        = Comparator.comparing(blockPos -> blockPos.toBlockVector2().shr(4), CHUNK_COMPARATOR);

    private RegionOptimizedChunkComparator() {
    }

}
