ChunkUtils.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * 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.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\world\format\io;
 
use pocketmine\world\format\PalettedBlockArray;
use function chr;
use function ord;
use function str_repeat;
use function strlen;
 
class ChunkUtils{
 
    public static function convertBiomeColors(array $array) : string{
        $result = str_repeat("\x00", 256);
        foreach($array as $i => $color){
            $result[$i] = chr(($color >> 24) & 0xff);
        }
        return $result;
    }
 
    public static function extrapolate3DBiomes(string $biomes2d) : PalettedBlockArray{
        if(strlen($biomes2d) !== 256){
            throw new \InvalidArgumentException("Biome array is expected to be exactly 256 bytes");
        }
        $biomePalette = new PalettedBlockArray(ord($biomes2d[0]));
        for($x = 0; $x < 16; ++$x){
            for($z = 0; $z < 16; ++$z){
                $biomeId = ord($biomes2d[($z << 4) | $x]);
                for($y = 0; $y < 16; ++$y){
                    $biomePalette->set($x, $y, $z, $biomeId);
                }
            }
        }
 
        return $biomePalette;
    }
}