mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-08-27 13:38:58 +00:00
36727aabf7
if anyone asks me why not use a static method, it's because I want to make this more dynamic going forward, and statics are anything but.
69 lines
2.1 KiB
PHP
69 lines
2.1 KiB
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\player;
|
|
|
|
use pocketmine\world\World;
|
|
|
|
//TODO: turn this into an interface?
|
|
final class ChunkSelector{
|
|
|
|
/**
|
|
* @preturn \Generator|int[]
|
|
* @phpstan-return \Generator<int, int, void, void>
|
|
*/
|
|
public function selectChunks(int $radius, int $centerX, int $centerZ) : \Generator{
|
|
$radiusSquared = $radius ** 2;
|
|
|
|
for($x = 0; $x < $radius; ++$x){
|
|
for($z = 0; $z <= $x; ++$z){
|
|
if(($x ** 2 + $z ** 2) > $radiusSquared){
|
|
break; //skip to next band
|
|
}
|
|
|
|
//If the chunk is in the radius, others at the same offsets in different quadrants are also guaranteed to be.
|
|
|
|
/* Top right quadrant */
|
|
yield World::chunkHash($centerX + $x, $centerZ + $z);
|
|
/* Top left quadrant */
|
|
yield World::chunkHash($centerX - $x - 1, $centerZ + $z);
|
|
/* Bottom right quadrant */
|
|
yield World::chunkHash($centerX + $x, $centerZ - $z - 1);
|
|
/* Bottom left quadrant */
|
|
yield World::chunkHash($centerX - $x - 1, $centerZ - $z - 1);
|
|
|
|
if($x !== $z){
|
|
/* Top right quadrant mirror */
|
|
yield World::chunkHash($centerX + $z, $centerZ + $x);
|
|
/* Top left quadrant mirror */
|
|
yield World::chunkHash($centerX - $z - 1, $centerZ + $x);
|
|
/* Bottom right quadrant mirror */
|
|
yield World::chunkHash($centerX + $z, $centerZ - $x - 1);
|
|
/* Bottom left quadrant mirror */
|
|
yield World::chunkHash($centerX - $z - 1, $centerZ - $x - 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|