HeightArray.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;
 
use function array_fill;
use function count;
 
final class HeightArray{
 
    private \SplFixedArray $array;
 
    public function __construct(array $values){
        if(count($values) !== 256){
            throw new \InvalidArgumentException("Expected exactly 256 values");
        }
        $this->array = \SplFixedArray::fromArray($values);
    }
 
    public static function fill(int $value) : self{
        return new self(array_fill(0, 256, $value));
    }
 
    private static function idx(int $x, int $z) : int{
        if($x < 0 || $x >= 16 || $z < 0 || $z >= 16){
            throw new \InvalidArgumentException("x and z must be in the range 0-15");
        }
        return ($z << 4) | $x;
    }
 
    public function get(int $x, int $z) : int{
        return $this->array[self::idx($x, $z)];
    }
 
    public function set(int $x, int $z, int $height) : void{
        $this->array[self::idx($x, $z)] = $height;
    }
 
    public function getValues() : array{
        return $this->array->toArray();
    }
 
    public function __clone(){
        $this->array = clone $this->array;
    }
}