mirror of
https://github.com/pmmp/PocketMine-MP.git
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233 lines
8.3 KiB
PHP
233 lines
8.3 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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declare(strict_types=1);
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namespace pocketmine\world\light;
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use pocketmine\world\format\Chunk;
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use pocketmine\world\format\HeightArray;
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use pocketmine\world\format\LightArray;
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use pocketmine\world\utils\SubChunkExplorer;
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use pocketmine\world\utils\SubChunkExplorerStatus;
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use pocketmine\world\World;
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use function max;
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class SkyLightUpdate extends LightUpdate{
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/**
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* @var \SplFixedArray|bool[]
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* @phpstan-var \SplFixedArray<bool>
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*/
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private $directSkyLightBlockers;
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/**
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* @param \SplFixedArray|int[] $lightFilters
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* @param \SplFixedArray|bool[] $directSkyLightBlockers
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* @phpstan-param \SplFixedArray<int> $lightFilters
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* @phpstan-param \SplFixedArray<bool> $directSkyLightBlockers
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*/
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public function __construct(SubChunkExplorer $subChunkExplorer, \SplFixedArray $lightFilters, \SplFixedArray $directSkyLightBlockers){
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parent::__construct($subChunkExplorer, $lightFilters);
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$this->directSkyLightBlockers = $directSkyLightBlockers;
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}
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protected function getCurrentLightArray() : LightArray{
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return $this->subChunkExplorer->currentSubChunk->getBlockSkyLightArray();
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}
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protected function getEffectiveLight(int $x, int $y, int $z) : int{
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if($y >= World::Y_MAX){
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$this->subChunkExplorer->invalidate();
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return 15;
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}
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return parent::getEffectiveLight($x, $y, $z);
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}
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public function recalculateNode(int $x, int $y, int $z) : void{
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if($this->subChunkExplorer->moveTo($x, $y, $z) === SubChunkExplorerStatus::INVALID){
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return;
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}
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$chunk = $this->subChunkExplorer->currentChunk;
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$oldHeightMap = $chunk->getHeightMap($x & 0xf, $z & 0xf);
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$source = $this->subChunkExplorer->currentSubChunk->getFullBlock($x & 0xf, $y & 0xf, $z & 0xf);
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$yPlusOne = $y + 1;
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if($yPlusOne === $oldHeightMap){ //Block changed directly beneath the heightmap. Check if a block was removed or changed to a different light-filter.
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$newHeightMap = self::recalculateHeightMapColumn($chunk, $x & 0x0f, $z & 0x0f, $this->directSkyLightBlockers);
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$chunk->setHeightMap($x & 0xf, $z & 0xf, $newHeightMap);
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}elseif($yPlusOne > $oldHeightMap){ //Block changed above the heightmap.
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if($this->directSkyLightBlockers[$source]){
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$chunk->setHeightMap($x & 0xf, $z & 0xf, $yPlusOne);
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$newHeightMap = $yPlusOne;
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}else{ //Block changed which has no effect on direct sky light, for example placing or removing glass.
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return;
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}
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}else{ //Block changed below heightmap
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$newHeightMap = $oldHeightMap;
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}
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if($newHeightMap > $oldHeightMap){ //Heightmap increase, block placed, remove sky light
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for($i = $y; $i >= $oldHeightMap; --$i){
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$this->setAndUpdateLight($x, $i, $z, 0); //Remove all light beneath, adjacent recalculation will handle the rest.
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}
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}elseif($newHeightMap < $oldHeightMap){ //Heightmap decrease, block changed or removed, add sky light
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for($i = $y; $i >= $newHeightMap; --$i){
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$this->setAndUpdateLight($x, $i, $z, 15);
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}
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}else{ //No heightmap change, block changed "underground"
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$this->setAndUpdateLight($x, $y, $z, max(0, $this->getHighestAdjacentLight($x, $y, $z) - $this->lightFilters[$source]));
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}
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}
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public function recalculateChunk(int $chunkX, int $chunkZ) : int{
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if($this->subChunkExplorer->moveToChunk($chunkX, 0, $chunkZ) === SubChunkExplorerStatus::INVALID){
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throw new \InvalidArgumentException("Chunk $chunkX $chunkZ does not exist");
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}
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$chunk = $this->subChunkExplorer->currentChunk;
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$newHeightMap = self::recalculateHeightMap($chunk, $this->directSkyLightBlockers);
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$chunk->setHeightMapArray($newHeightMap->getValues());
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//setAndUpdateLight() won't bother propagating from nodes that are already what we want to change them to, so we
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//have to avoid filling full light for any subchunk that contains a heightmap Y coordinate
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$highestHeightMapPlusOne = max($chunk->getHeightMapArray()) + 1;
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$lowestClearSubChunk = ($highestHeightMapPlusOne >> 4) + (($highestHeightMapPlusOne & 0xf) !== 0 ? 1 : 0);
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$chunkHeight = $chunk->getSubChunks()->count();
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for($y = 0; $y < $lowestClearSubChunk && $y < $chunkHeight; $y++){
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$chunk->getSubChunk($y)->setBlockSkyLightArray(LightArray::fill(0));
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}
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for($y = $lowestClearSubChunk, $yMax = $chunkHeight; $y < $yMax; $y++){
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$chunk->getSubChunk($y)->setBlockSkyLightArray(LightArray::fill(15));
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}
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$lightSources = 0;
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$baseX = $chunkX << 4;
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$baseZ = $chunkZ << 4;
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for($x = 0; $x < 16; ++$x){
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for($z = 0; $z < 16; ++$z){
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$currentHeight = $chunk->getHeightMap($x, $z);
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$maxAdjacentHeight = 0;
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if($x !== 0){
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$maxAdjacentHeight = max($maxAdjacentHeight, $chunk->getHeightMap($x - 1, $z));
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}
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if($x !== 15){
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$maxAdjacentHeight = max($maxAdjacentHeight, $chunk->getHeightMap($x + 1, $z));
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}
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if($z !== 0){
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$maxAdjacentHeight = max($maxAdjacentHeight, $chunk->getHeightMap($x, $z - 1));
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}
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if($z !== 15){
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$maxAdjacentHeight = max($maxAdjacentHeight, $chunk->getHeightMap($x, $z + 1));
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}
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/*
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* We skip the top two blocks between current height and max adjacent (if there's a difference) because:
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* - the block next to the highest adjacent will do nothing during propagation (it's surrounded by 15s)
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* - the block below that block will do the same as the node in the highest adjacent
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* NOTE: If block opacity becomes direction-aware in the future, the second point will become invalid.
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*/
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$nodeColumnEnd = max($currentHeight, $maxAdjacentHeight - 2);
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for($y = $currentHeight; $y <= $nodeColumnEnd; $y++){
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$this->setAndUpdateLight($x + $baseX, $y, $z + $baseZ, 15);
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$lightSources++;
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}
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for($y = $nodeColumnEnd + 1, $yMax = $lowestClearSubChunk * 16; $y < $yMax; $y++){
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if($this->subChunkExplorer->moveTo($x + $baseX, $y, $z + $baseZ) !== SubChunkExplorerStatus::INVALID){
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$this->getCurrentLightArray()->set($x, $y & 0xf, $z, 15);
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}
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}
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}
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}
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return $lightSources;
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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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* @param \SplFixedArray|bool[] $directSkyLightBlockers
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* @phpstan-param \SplFixedArray<bool> $directSkyLightBlockers
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*/
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private static function recalculateHeightMap(Chunk $chunk, \SplFixedArray $directSkyLightBlockers) : HeightArray{
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$maxSubChunkY = $chunk->getSubChunks()->count() - 1;
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for(; $maxSubChunkY >= 0; $maxSubChunkY--){
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if(!$chunk->getSubChunk($maxSubChunkY)->isEmptyFast()){
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break;
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}
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}
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$result = HeightArray::fill(0);
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if($maxSubChunkY === -1){ //whole column is definitely empty
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return $result;
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}
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for($z = 0; $z < 16; ++$z){
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for($x = 0; $x < 16; ++$x){
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$y = null;
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for($subChunkY = $maxSubChunkY; $subChunkY >= 0; $subChunkY--){
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$subHighestBlockY = $chunk->getSubChunk($subChunkY)->getHighestBlockAt($x, $z);
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if($subHighestBlockY !== -1){
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$y = ($subChunkY * 16) + $subHighestBlockY;
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break;
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}
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}
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if($y === null){ //no blocks in the column
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$result->set($x, $z, 0);
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}else{
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for(; $y >= 0; --$y){
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if($directSkyLightBlockers[$chunk->getFullBlock($x, $y, $z)]){
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$result->set($x, $z, $y + 1);
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break;
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}
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}
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}
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}
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}
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return $result;
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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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* @param \SplFixedArray|bool[] $directSkyLightBlockers
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* @phpstan-param \SplFixedArray<bool> $directSkyLightBlockers
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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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private static function recalculateHeightMapColumn(Chunk $chunk, int $x, int $z, \SplFixedArray $directSkyLightBlockers) : int{
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$y = $chunk->getHighestBlockAt($x, $z);
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for(; $y >= 0; --$y){
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if($directSkyLightBlockers[$chunk->getFullBlock($x, $y, $z)]){
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break;
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}
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}
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return $y + 1;
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}
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}
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