Removed pocketmine subdirectory, map PSR-4 style

src/world/light/SkyLightUpdate.php

@@ -0,0 +1,69 @@
+<?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\light;
+
+use pocketmine\block\BlockFactory;
+use function max;
+
+class SkyLightUpdate extends LightUpdate{
+	protected function updateLightArrayRef() : void{
+		$this->currentLightArray = $this->subChunkHandler->currentSubChunk->getBlockSkyLightArray();
+	}
+
+	public function recalculateNode(int $x, int $y, int $z) : void{
+		$chunk = $this->world->getChunk($x >> 4, $z >> 4);
+		if($chunk === null){
+			return;
+		}
+		$oldHeightMap = $chunk->getHeightMap($x & 0xf, $z & 0xf);
+		$source = $this->world->getBlockAt($x, $y, $z);
+
+		$yPlusOne = $y + 1;
+
+		if($yPlusOne === $oldHeightMap){ //Block changed directly beneath the heightmap. Check if a block was removed or changed to a different light-filter.
+			$newHeightMap = $chunk->recalculateHeightMapColumn($x & 0x0f, $z & 0x0f);
+		}elseif($yPlusOne > $oldHeightMap){ //Block changed above the heightmap.
+			if($source->getLightFilter() > 0 or $source->diffusesSkyLight()){
+				$chunk->setHeightMap($x & 0xf, $z & 0xf, $yPlusOne);
+				$newHeightMap = $yPlusOne;
+			}else{ //Block changed which has no effect on direct sky light, for example placing or removing glass.
+				return;
+			}
+		}else{ //Block changed below heightmap
+			$newHeightMap = $oldHeightMap;
+		}
+
+		if($newHeightMap > $oldHeightMap){ //Heightmap increase, block placed, remove sky light
+			for($i = $y; $i >= $oldHeightMap; --$i){
+				$this->setAndUpdateLight($x, $i, $z, 0); //Remove all light beneath, adjacent recalculation will handle the rest.
+			}
+		}elseif($newHeightMap < $oldHeightMap){ //Heightmap decrease, block changed or removed, add sky light
+			for($i = $y; $i >= $newHeightMap; --$i){
+				$this->setAndUpdateLight($x, $i, $z, 15);
+			}
+		}else{ //No heightmap change, block changed "underground"
+			$this->setAndUpdateLight($x, $y, $z, max(0, $this->getHighestAdjacentLight($x, $y, $z) - BlockFactory::$lightFilter[$source->getFullId()]));
+		}
+	}
+}