mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-05-27 23:57:02 +00:00
906 lines
22 KiB
PHP
906 lines
22 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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/**
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* Implementation of MCPE-style chunks with subchunks with XZY ordering.
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*/
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declare(strict_types=1);
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namespace pocketmine\level\format;
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use pocketmine\block\BlockFactory;
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use pocketmine\entity\Entity;
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use pocketmine\level\Level;
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use pocketmine\nbt\tag\CompoundTag;
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use pocketmine\nbt\tag\StringTag;
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use pocketmine\Player;
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use pocketmine\tile\Spawnable;
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use pocketmine\tile\Tile;
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use pocketmine\utils\BinaryStream;
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class Chunk{
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public const MAX_SUBCHUNKS = 16;
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/** @var int */
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protected $x;
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/** @var int */
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protected $z;
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/** @var bool */
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protected $hasChanged = false;
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/** @var bool */
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protected $isInit = false;
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/** @var bool */
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protected $lightPopulated = false;
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/** @var bool */
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protected $terrainGenerated = false;
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/** @var bool */
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protected $terrainPopulated = false;
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/** @var int */
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protected $height = Chunk::MAX_SUBCHUNKS;
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/** @var \SplFixedArray|SubChunkInterface[] */
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protected $subChunks;
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/** @var EmptySubChunk */
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protected $emptySubChunk;
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/** @var Tile[] */
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protected $tiles = [];
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/** @var Entity[] */
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protected $entities = [];
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/** @var \SplFixedArray|int[] */
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protected $heightMap;
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/** @var string */
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protected $biomeIds;
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/** @var CompoundTag[] */
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protected $NBTtiles = [];
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/** @var CompoundTag[] */
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protected $NBTentities = [];
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/**
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* @param int $chunkX
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* @param int $chunkZ
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* @param SubChunkInterface[] $subChunks
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* @param CompoundTag[] $entities
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* @param CompoundTag[] $tiles
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* @param string $biomeIds
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* @param int[] $heightMap
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*/
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public function __construct(int $chunkX, int $chunkZ, array $subChunks = [], array $entities = [], array $tiles = [], string $biomeIds = "", array $heightMap = []){
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$this->x = $chunkX;
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$this->z = $chunkZ;
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$this->height = Chunk::MAX_SUBCHUNKS; //TODO: add a way of changing this
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$this->subChunks = new \SplFixedArray($this->height);
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$this->emptySubChunk = EmptySubChunk::getInstance();
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foreach($this->subChunks as $y => $null){
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$this->subChunks[$y] = $subChunks[$y] ?? $this->emptySubChunk;
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}
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if(count($heightMap) === 256){
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$this->heightMap = \SplFixedArray::fromArray($heightMap);
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}else{
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assert(count($heightMap) === 0, "Wrong HeightMap value count, expected 256, got " . count($heightMap));
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$val = ($this->height * 16);
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$this->heightMap = \SplFixedArray::fromArray(array_fill(0, 256, $val));
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}
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if(strlen($biomeIds) === 256){
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$this->biomeIds = $biomeIds;
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}else{
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assert($biomeIds === "", "Wrong BiomeIds value count, expected 256, got " . strlen($biomeIds));
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$this->biomeIds = str_repeat("\x00", 256);
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}
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$this->NBTtiles = $tiles;
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$this->NBTentities = $entities;
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}
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/**
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* @return int
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*/
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public function getX() : int{
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return $this->x;
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}
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/**
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* @return int
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*/
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public function getZ() : int{
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return $this->z;
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}
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public function setX(int $x){
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$this->x = $x;
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}
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/**
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* @param int $z
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*/
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public function setZ(int $z){
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$this->z = $z;
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}
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/**
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* Returns the chunk height in count of subchunks.
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*
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* @return int
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*/
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public function getHeight() : int{
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return $this->height;
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}
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/**
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* Returns a bitmap of block ID and meta at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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*
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* @return int bitmap, (id << 4) | meta
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*/
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public function getFullBlock(int $x, int $y, int $z) : int{
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return $this->getSubChunk($y >> 4)->getFullBlock($x, $y & 0x0f, $z);
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}
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/**
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* Sets block ID and meta in one call at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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* @param int|null $blockId 0-255 if null, does not change
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* @param int|null $meta 0-15 if null, does not change
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*
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* @return bool
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*/
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public function setBlock(int $x, int $y, int $z, ?int $blockId = null, ?int $meta = null) : bool{
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if($this->getSubChunk($y >> 4, true)->setBlock($x, $y & 0x0f, $z, $blockId !== null ? ($blockId & 0xff) : null, $meta !== null ? ($meta & 0x0f) : null)){
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$this->hasChanged = true;
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return true;
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}
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return false;
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}
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/**
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* Returns the block ID at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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*
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* @return int 0-255
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*/
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public function getBlockId(int $x, int $y, int $z) : int{
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return $this->getSubChunk($y >> 4)->getBlockId($x, $y & 0x0f, $z);
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}
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/**
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* Sets the block ID at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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* @param int $id 0-255
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*/
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public function setBlockId(int $x, int $y, int $z, int $id){
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if($this->getSubChunk($y >> 4, true)->setBlockId($x, $y & 0x0f, $z, $id)){
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$this->hasChanged = true;
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}
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}
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/**
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* Returns the block meta value at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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*
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* @return int 0-15
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*/
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public function getBlockData(int $x, int $y, int $z) : int{
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return $this->getSubChunk($y >> 4)->getBlockData($x, $y & 0x0f, $z);
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}
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/**
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* Sets the block meta value at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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* @param int $data 0-15
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*/
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public function setBlockData(int $x, int $y, int $z, int $data){
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if($this->getSubChunk($y >> 4, true)->setBlockData($x, $y & 0x0f, $z, $data)){
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$this->hasChanged = true;
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}
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}
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/**
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* Returns the sky light level at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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*
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* @return int 0-15
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*/
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public function getBlockSkyLight(int $x, int $y, int $z) : int{
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return $this->getSubChunk($y >> 4)->getBlockSkyLight($x, $y & 0x0f, $z);
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}
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/**
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* Sets the sky light level at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y
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* @param int $z 0-15
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* @param int $level 0-15
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*/
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public function setBlockSkyLight(int $x, int $y, int $z, int $level){
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if($this->getSubChunk($y >> 4, true)->setBlockSkyLight($x, $y & 0x0f, $z, $level)){
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$this->hasChanged = true;
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}
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}
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/**
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* @param int $level
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*/
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public function setAllBlockSkyLight(int $level){
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$char = chr(($level & 0x0f) | ($level << 4));
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$data = str_repeat($char, 2048);
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for($y = $this->getHighestSubChunkIndex(); $y >= 0; --$y){
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$this->getSubChunk($y, true)->setBlockSkyLightArray($data);
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}
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}
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/**
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* Returns the block light level at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y 0-15
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* @param int $z 0-15
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*
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* @return int 0-15
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*/
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public function getBlockLight(int $x, int $y, int $z) : int{
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return $this->getSubChunk($y >> 4)->getBlockLight($x, $y & 0x0f, $z);
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}
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/**
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* Sets the block light level at the specified chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $y 0-15
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* @param int $z 0-15
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* @param int $level 0-15
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*/
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public function setBlockLight(int $x, int $y, int $z, int $level){
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if($this->getSubChunk($y >> 4, true)->setBlockLight($x, $y & 0x0f, $z, $level)){
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$this->hasChanged = true;
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}
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}
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/**
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* @param int $level
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*/
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public function setAllBlockLight(int $level){
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$char = chr(($level & 0x0f) | ($level << 4));
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$data = str_repeat($char, 2048);
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for($y = $this->getHighestSubChunkIndex(); $y >= 0; --$y){
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$this->getSubChunk($y, true)->setBlockLightArray($data);
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}
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}
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/**
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* Returns the Y coordinate of the highest non-air block at the specified X/Z chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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*
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* @return int 0-255, or -1 if there are no blocks in the column
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*/
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public function getHighestBlockAt(int $x, int $z) : int{
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$index = $this->getHighestSubChunkIndex();
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if($index === -1){
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return -1;
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}
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for($y = $index; $y >= 0; --$y){
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$height = $this->getSubChunk($y)->getHighestBlockAt($x, $z) | ($y << 4);
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if($height !== -1){
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return $height;
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}
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}
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return -1;
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}
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public function getMaxY() : int{
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return ($this->getHighestSubChunkIndex() << 4) | 0x0f;
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}
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/**
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* Returns the heightmap value at the specified X/Z chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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*
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* @return int
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*/
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public function getHeightMap(int $x, int $z) : int{
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return $this->heightMap[($z << 4) | $x];
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}
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/**
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* Returns the heightmap value at the specified X/Z chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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* @param int $value
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*/
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public function setHeightMap(int $x, int $z, int $value){
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$this->heightMap[($z << 4) | $x] = $value;
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}
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/**
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* Recalculates the heightmap for the whole chunk.
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*/
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public function recalculateHeightMap(){
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for($z = 0; $z < 16; ++$z){
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for($x = 0; $x < 16; ++$x){
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$this->recalculateHeightMapColumn($x, $z);
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}
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}
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}
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/**
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* Recalculates the heightmap for the block column at the specified X/Z chunk coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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*
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* @return int New calculated heightmap value (0-256 inclusive)
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*/
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public function recalculateHeightMapColumn(int $x, int $z) : int{
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$max = $this->getHighestBlockAt($x, $z);
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for($y = $max; $y >= 0; --$y){
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if(BlockFactory::$lightFilter[$state = $this->getFullBlock($x, $y, $z)] > 1 or BlockFactory::$diffusesSkyLight[$state]){
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break;
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}
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}
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$this->setHeightMap($x, $z, $y + 1);
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return $y + 1;
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}
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/**
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* Performs basic sky light population on the chunk.
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* This does not cater for adjacent sky light, this performs direct sky light population only. This may cause some strange visual artifacts
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* if the chunk is light-populated after being terrain-populated.
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*
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* TODO: fast adjacent light spread
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*/
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public function populateSkyLight(){
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$maxY = $this->getMaxY();
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$this->setAllBlockSkyLight(0);
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for($x = 0; $x < 16; ++$x){
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for($z = 0; $z < 16; ++$z){
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$heightMap = $this->getHeightMap($x, $z);
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for($y = $maxY; $y >= $heightMap; --$y){
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$this->setBlockSkyLight($x, $y, $z, 15);
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}
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$light = 15;
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for(; $y >= 0; --$y){
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if($light > 0){
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$light -= BlockFactory::$lightFilter[$this->getFullBlock($x, $y, $z)];
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if($light <= 0){
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break;
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}
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}
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$this->setBlockSkyLight($x, $y, $z, $light);
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}
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}
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}
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}
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/**
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* Returns the biome ID at the specified X/Z chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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*
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* @return int 0-255
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*/
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public function getBiomeId(int $x, int $z) : int{
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return ord($this->biomeIds{($z << 4) | $x});
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}
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/**
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* Sets the biome ID at the specified X/Z chunk block coordinates
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*
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* @param int $x 0-15
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* @param int $z 0-15
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* @param int $biomeId 0-255
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*/
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public function setBiomeId(int $x, int $z, int $biomeId){
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$this->hasChanged = true;
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$this->biomeIds{($z << 4) | $x} = chr($biomeId & 0xff);
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}
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/**
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* @return bool
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*/
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public function isLightPopulated() : bool{
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return $this->lightPopulated;
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}
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/**
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* @param bool $value
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*/
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public function setLightPopulated(bool $value = true){
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$this->lightPopulated = $value;
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}
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/**
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* @return bool
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*/
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public function isPopulated() : bool{
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return $this->terrainPopulated;
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}
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/**
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* @param bool $value
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*/
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public function setPopulated(bool $value = true){
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$this->terrainPopulated = $value;
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}
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/**
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* @return bool
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*/
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public function isGenerated() : bool{
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return $this->terrainGenerated;
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}
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/**
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* @param bool $value
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*/
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public function setGenerated(bool $value = true){
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$this->terrainGenerated = $value;
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}
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/**
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* @param Entity $entity
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*/
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public function addEntity(Entity $entity){
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if($entity->isClosed()){
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throw new \InvalidArgumentException("Attempted to add a garbage closed Entity to a chunk");
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}
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$this->entities[$entity->getId()] = $entity;
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if(!($entity instanceof Player) and $this->isInit){
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$this->hasChanged = true;
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}
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}
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/**
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* @param Entity $entity
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*/
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public function removeEntity(Entity $entity){
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unset($this->entities[$entity->getId()]);
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if(!($entity instanceof Player) and $this->isInit){
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$this->hasChanged = true;
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}
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}
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/**
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* @param Tile $tile
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*/
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public function addTile(Tile $tile){
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if($tile->isClosed()){
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throw new \InvalidArgumentException("Attempted to add a garbage closed Tile to a chunk");
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}
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if(isset($this->tiles[$index = Chunk::blockHash($tile->x, $tile->y, $tile->z)]) and $this->tiles[$index] !== $tile){
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$this->tiles[$index]->close();
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}
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$this->tiles[$index] = $tile;
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if($this->isInit){
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$this->hasChanged = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param Tile $tile
|
|
*/
|
|
public function removeTile(Tile $tile){
|
|
unset($this->tiles[Chunk::blockHash($tile->x, $tile->y, $tile->z)]);
|
|
if($this->isInit){
|
|
$this->hasChanged = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an array of entities currently using this chunk.
|
|
*
|
|
* @return Entity[]
|
|
*/
|
|
public function getEntities() : array{
|
|
return $this->entities;
|
|
}
|
|
|
|
/**
|
|
* @return Entity[]
|
|
*/
|
|
public function getSavableEntities() : array{
|
|
return array_filter($this->entities, function(Entity $entity) : bool{ return $entity->canSaveWithChunk() and !$entity->isClosed(); });
|
|
}
|
|
|
|
/**
|
|
* @return Tile[]
|
|
*/
|
|
public function getTiles() : array{
|
|
return $this->tiles;
|
|
}
|
|
|
|
/**
|
|
* Returns the tile at the specified chunk block coordinates, or null if no tile exists.
|
|
*
|
|
* @param int $x 0-15
|
|
* @param int $y
|
|
* @param int $z 0-15
|
|
*
|
|
* @return Tile|null
|
|
*/
|
|
public function getTile(int $x, int $y, int $z){
|
|
return $this->tiles[Chunk::blockHash($x, $y, $z)] ?? null;
|
|
}
|
|
|
|
/**
|
|
* Called when the chunk is unloaded, closing entities and tiles.
|
|
*/
|
|
public function onUnload() : void{
|
|
foreach($this->getEntities() as $entity){
|
|
if($entity instanceof Player){
|
|
continue;
|
|
}
|
|
$entity->close();
|
|
}
|
|
|
|
foreach($this->getTiles() as $tile){
|
|
$tile->close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Deserializes tiles and entities from NBT
|
|
*
|
|
* @param Level $level
|
|
*/
|
|
public function initChunk(Level $level){
|
|
if(!$this->isInit){
|
|
$changed = false;
|
|
if($this->NBTentities !== null){
|
|
$level->timings->syncChunkLoadEntitiesTimer->startTiming();
|
|
foreach($this->NBTentities as $nbt){
|
|
if($nbt instanceof CompoundTag){
|
|
if(!$nbt->hasTag("id")){ //allow mixed types (because of leveldb)
|
|
$changed = true;
|
|
continue;
|
|
}
|
|
|
|
try{
|
|
$entity = Entity::createEntity($nbt->getTag("id")->getValue(), $level, $nbt);
|
|
if(!($entity instanceof Entity)){
|
|
$changed = true;
|
|
continue;
|
|
}
|
|
}catch(\Throwable $t){
|
|
$level->getServer()->getLogger()->logException($t);
|
|
$changed = true;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
$level->timings->syncChunkLoadEntitiesTimer->stopTiming();
|
|
|
|
$level->timings->syncChunkLoadTileEntitiesTimer->startTiming();
|
|
foreach($this->NBTtiles as $nbt){
|
|
if($nbt instanceof CompoundTag){
|
|
if(!$nbt->hasTag(Tile::TAG_ID, StringTag::class)){
|
|
$changed = true;
|
|
continue;
|
|
}
|
|
|
|
if(Tile::createTile($nbt->getString(Tile::TAG_ID), $level, $nbt) === null){
|
|
$changed = true;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
$level->timings->syncChunkLoadTileEntitiesTimer->stopTiming();
|
|
|
|
$this->NBTentities = null;
|
|
$this->NBTtiles = null;
|
|
}
|
|
|
|
$this->hasChanged = $changed;
|
|
|
|
$this->isInit = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
*/
|
|
public function getBiomeIdArray() : string{
|
|
return $this->biomeIds;
|
|
}
|
|
|
|
/**
|
|
* @return int[]
|
|
*/
|
|
public function getHeightMapArray() : array{
|
|
return $this->heightMap->toArray();
|
|
}
|
|
|
|
/**
|
|
* @return bool
|
|
*/
|
|
public function hasChanged() : bool{
|
|
return $this->hasChanged;
|
|
}
|
|
|
|
/**
|
|
* @param bool $value
|
|
*/
|
|
public function setChanged(bool $value = true){
|
|
$this->hasChanged = $value;
|
|
}
|
|
|
|
/**
|
|
* Returns the subchunk at the specified subchunk Y coordinate, or an empty, unmodifiable stub if it does not exist or the coordinate is out of range.
|
|
*
|
|
* @param int $y
|
|
* @param bool $generateNew Whether to create a new, modifiable subchunk if there is not one in place
|
|
*
|
|
* @return SubChunkInterface
|
|
*/
|
|
public function getSubChunk(int $y, bool $generateNew = false) : SubChunkInterface{
|
|
if($y < 0 or $y >= $this->height){
|
|
return $this->emptySubChunk;
|
|
}elseif($generateNew and $this->subChunks[$y] instanceof EmptySubChunk){
|
|
$this->subChunks[$y] = new SubChunk();
|
|
}
|
|
|
|
return $this->subChunks[$y];
|
|
}
|
|
|
|
/**
|
|
* Sets a subchunk in the chunk index
|
|
*
|
|
* @param int $y
|
|
* @param SubChunkInterface|null $subChunk
|
|
* @param bool $allowEmpty Whether to check if the chunk is empty, and if so replace it with an empty stub
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function setSubChunk(int $y, SubChunkInterface $subChunk = null, bool $allowEmpty = false) : bool{
|
|
if($y < 0 or $y >= $this->height){
|
|
return false;
|
|
}
|
|
if($subChunk === null or ($subChunk->isEmpty() and !$allowEmpty)){
|
|
$this->subChunks[$y] = $this->emptySubChunk;
|
|
}else{
|
|
$this->subChunks[$y] = $subChunk;
|
|
}
|
|
$this->hasChanged = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @return \SplFixedArray|SubChunkInterface[]
|
|
*/
|
|
public function getSubChunks() : \SplFixedArray{
|
|
return $this->subChunks;
|
|
}
|
|
|
|
/**
|
|
* Returns the Y coordinate of the highest non-empty subchunk in this chunk.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getHighestSubChunkIndex() : int{
|
|
for($y = $this->subChunks->count() - 1; $y >= 0; --$y){
|
|
if($this->subChunks[$y] instanceof EmptySubChunk){
|
|
//No need to thoroughly prune empties at runtime, this will just reduce performance.
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return $y;
|
|
}
|
|
|
|
/**
|
|
* Returns the count of subchunks that need sending to players
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getSubChunkSendCount() : int{
|
|
return $this->getHighestSubChunkIndex() + 1;
|
|
}
|
|
|
|
/**
|
|
* Disposes of empty subchunks and frees data where possible
|
|
*/
|
|
public function collectGarbage() : void{
|
|
foreach($this->subChunks as $y => $subChunk){
|
|
if($subChunk instanceof SubChunk){
|
|
if($subChunk->isEmpty()){
|
|
$this->subChunks[$y] = $this->emptySubChunk;
|
|
}else{
|
|
$subChunk->collectGarbage();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Serializes the chunk for sending to players
|
|
*
|
|
* @return string
|
|
*/
|
|
public function networkSerialize() : string{
|
|
$result = "";
|
|
$subChunkCount = $this->getSubChunkSendCount();
|
|
$result .= chr($subChunkCount);
|
|
for($y = 0; $y < $subChunkCount; ++$y){
|
|
$result .= $this->subChunks[$y]->networkSerialize();
|
|
}
|
|
$result .= pack("v*", ...$this->heightMap)
|
|
. $this->biomeIds
|
|
. chr(0); //border block array count
|
|
//Border block entry format: 1 byte (4 bits X, 4 bits Z). These are however useless since they crash the regular client.
|
|
|
|
foreach($this->tiles as $tile){
|
|
if($tile instanceof Spawnable){
|
|
$result .= $tile->getSerializedSpawnCompound();
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Fast-serializes the chunk for passing between threads
|
|
* TODO: tiles and entities
|
|
*
|
|
* @return string
|
|
*/
|
|
public function fastSerialize() : string{
|
|
$stream = new BinaryStream();
|
|
$stream->putInt($this->x);
|
|
$stream->putInt($this->z);
|
|
$stream->putByte(($this->lightPopulated ? 4 : 0) | ($this->terrainPopulated ? 2 : 0) | ($this->terrainGenerated ? 1 : 0));
|
|
if($this->terrainGenerated){
|
|
//subchunks
|
|
$count = 0;
|
|
$subChunks = "";
|
|
foreach($this->subChunks as $y => $subChunk){
|
|
if($subChunk instanceof EmptySubChunk){
|
|
continue;
|
|
}
|
|
++$count;
|
|
$subChunks .= chr($y) . $subChunk->getBlockIdArray() . $subChunk->getBlockDataArray();
|
|
if($this->lightPopulated){
|
|
$subChunks .= $subChunk->getBlockSkyLightArray() . $subChunk->getBlockLightArray();
|
|
}
|
|
}
|
|
$stream->putByte($count);
|
|
$stream->put($subChunks);
|
|
|
|
//biomes
|
|
$stream->put($this->biomeIds);
|
|
if($this->lightPopulated){
|
|
$stream->put(pack("v*", ...$this->heightMap));
|
|
}
|
|
}
|
|
|
|
return $stream->getBuffer();
|
|
}
|
|
|
|
/**
|
|
* Deserializes a fast-serialized chunk
|
|
*
|
|
* @param string $data
|
|
*
|
|
* @return Chunk
|
|
*/
|
|
public static function fastDeserialize(string $data) : Chunk{
|
|
$stream = new BinaryStream($data);
|
|
|
|
$x = $stream->getInt();
|
|
$z = $stream->getInt();
|
|
$flags = $stream->getByte();
|
|
$lightPopulated = (bool) ($flags & 4);
|
|
$terrainPopulated = (bool) ($flags & 2);
|
|
$terrainGenerated = (bool) ($flags & 1);
|
|
|
|
$subChunks = [];
|
|
$biomeIds = "";
|
|
$heightMap = [];
|
|
if($terrainGenerated){
|
|
$count = $stream->getByte();
|
|
for($y = 0; $y < $count; ++$y){
|
|
$subChunks[$stream->getByte()] = new SubChunk(
|
|
$stream->get(4096), //blockids
|
|
$stream->get(2048), //blockdata
|
|
$lightPopulated ? $stream->get(2048) : "", //skylight
|
|
$lightPopulated ? $stream->get(2048) : "" //blocklight
|
|
);
|
|
}
|
|
|
|
$biomeIds = $stream->get(256);
|
|
if($lightPopulated){
|
|
$heightMap = array_values(unpack("v*", $stream->get(512)));
|
|
}
|
|
}
|
|
|
|
$chunk = new Chunk($x, $z, $subChunks, [], [], $biomeIds, $heightMap);
|
|
$chunk->setGenerated($terrainGenerated);
|
|
$chunk->setPopulated($terrainPopulated);
|
|
$chunk->setLightPopulated($lightPopulated);
|
|
|
|
return $chunk;
|
|
}
|
|
|
|
/**
|
|
* Hashes the given chunk block coordinates into a single integer.
|
|
*
|
|
* @param int $x 0-15
|
|
* @param int $y
|
|
* @param int $z 0-15
|
|
*
|
|
* @return int
|
|
*/
|
|
public static function blockHash(int $x, int $y, int $z) : int{
|
|
return ($y << 8) | (($z & 0x0f) << 4) | ($x & 0x0f);
|
|
}
|
|
}
|