From 534b988a1ce9f25b09e4c128b5688c23a1ac46b1 Mon Sep 17 00:00:00 2001
From: Shoghi Cervantes <shoghicp@gmail.com>
Date: Sun, 9 Aug 2015 00:38:23 +0200
Subject: [PATCH] Added basic Nether generator

---
 src/pocketmine/Server.php                     |   3 +
 src/pocketmine/level/Level.php                |  11 +-
 .../level/generator/biome/Biome.php           |   5 +-
 .../level/generator/hell/HellBiome.php        |  35 ++++
 .../level/generator/hell/Nether.php           | 184 ++++++++++++++++++
 .../level/generator/normal/Normal.php         |   2 -
 6 files changed, 233 insertions(+), 7 deletions(-)
 create mode 100644 src/pocketmine/level/generator/hell/HellBiome.php
 create mode 100644 src/pocketmine/level/generator/hell/Nether.php

diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index e38119b28..e588f559d 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -66,6 +66,7 @@ use pocketmine\level\format\mcregion\McRegion;
 use pocketmine\level\generator\biome\Biome;
 use pocketmine\level\generator\Flat;
 use pocketmine\level\generator\Generator;
+use pocketmine\level\generator\hell\Nether;
 use pocketmine\level\generator\normal\Normal;
 use pocketmine\level\Level;
 use pocketmine\metadata\EntityMetadataStore;
@@ -1646,6 +1647,8 @@ class Server{
 		Generator::addGenerator(Flat::class, "flat");
 		Generator::addGenerator(Normal::class, "normal");
 		Generator::addGenerator(Normal::class, "default");
+		Generator::addGenerator(Nether::class, "hell");
+		Generator::addGenerator(Nether::class, "nether");
 
 		foreach((array) $this->getProperty("worlds", []) as $name => $worldSetting){
 			if($this->loadLevel($name) === false){
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 6e4a0971c..e08ace66b 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -2664,13 +2664,18 @@ class Level implements ChunkManager, Metadatable{
 			$x = $v->x & 0x0f;
 			$z = $v->z & 0x0f;
 			if($chunk !== null){
-				$y = (int) min(127, $v->y);
+				$y = (int) min(126, $v->y);
+				$wasAir = ($chunk->getBlockId($x, $y - 1, $z) === 0);
 				for(; $y > 0; --$y){
 					$b = $chunk->getFullBlock($x, $y, $z);
 					$block = Block::get($b >> 4, $b & 0x0f);
 					if($this->isFullBlock($block)){
-						$y++;
-						break;
+						if($wasAir){
+							$y++;
+							break;
+						}
+					}else{
+						$wasAir = true;
 					}
 				}
 
diff --git a/src/pocketmine/level/generator/biome/Biome.php b/src/pocketmine/level/generator/biome/Biome.php
index a4d5e1caf..2b38fd03b 100644
--- a/src/pocketmine/level/generator/biome/Biome.php
+++ b/src/pocketmine/level/generator/biome/Biome.php
@@ -47,6 +47,8 @@ abstract class Biome{
 	const SWAMP = 6;
 	const RIVER = 7;
 
+	const HELL = 8;
+
 	const ICE_PLAINS = 12;
 
 
@@ -88,12 +90,11 @@ abstract class Biome{
 		self::register(self::MOUNTAINS, new MountainsBiome());
 		self::register(self::FOREST, new ForestBiome());
 		self::register(self::TAIGA, new TaigaBiome());
-
+		self::register(self::SWAMP, new SwampBiome());
 		self::register(self::RIVER, new RiverBiome());
 
 		self::register(self::ICE_PLAINS, new IcePlainsBiome());
 
-		self::register(self::SWAMP, new SwampBiome());
 
 		self::register(self::SMALL_MOUNTAINS, new SmallMountainsBiome());
 
diff --git a/src/pocketmine/level/generator/hell/HellBiome.php b/src/pocketmine/level/generator/hell/HellBiome.php
new file mode 100644
index 000000000..5fb717e92
--- /dev/null
+++ b/src/pocketmine/level/generator/hell/HellBiome.php
@@ -0,0 +1,35 @@
+<?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/
+ *
+ *
+*/
+
+namespace pocketmine\level\generator\hell;
+
+use pocketmine\level\generator\biome\Biome;
+
+class HellBiome extends Biome{
+
+	public function getName(){
+		return "Hell";
+	}
+
+	public function getColor(){
+		return 0;
+	}
+}
diff --git a/src/pocketmine/level/generator/hell/Nether.php b/src/pocketmine/level/generator/hell/Nether.php
new file mode 100644
index 000000000..45345dc48
--- /dev/null
+++ b/src/pocketmine/level/generator/hell/Nether.php
@@ -0,0 +1,184 @@
+<?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/
+ * 
+ *
+*/
+
+namespace pocketmine\level\generator\hell;
+
+use pocketmine\block\Block;
+use pocketmine\block\CoalOre;
+use pocketmine\block\DiamondOre;
+use pocketmine\block\Dirt;
+use pocketmine\block\GoldOre;
+use pocketmine\block\Gravel;
+use pocketmine\block\IronOre;
+use pocketmine\block\LapisOre;
+use pocketmine\block\RedstoneOre;
+use pocketmine\level\ChunkManager;
+use pocketmine\level\generator\biome\Biome;
+use pocketmine\level\generator\biome\BiomeSelector;
+use pocketmine\level\generator\Generator;
+
+use pocketmine\level\generator\noise\Simplex;
+
+use pocketmine\level\generator\object\OreType;
+use pocketmine\level\generator\populator\GroundCover;
+use pocketmine\level\generator\populator\Ore;
+use pocketmine\level\generator\populator\Populator;
+
+
+use pocketmine\level\Level;
+use pocketmine\math\Vector3 as Vector3;
+use pocketmine\utils\Random;
+
+class Nether extends Generator{
+
+	/** @var Populator[] */
+	private $populators = [];
+	/** @var ChunkManager */
+	private $level;
+	/** @var Random */
+	private $random;
+	private $waterHeight = 32;
+	private $emptyHeight = 64;
+	private $emptyAmplitude = 1;
+	private $density = 0.5;
+	private $bedrockDepth = 5;
+
+	/** @var Populator[] */
+	private $generationPopulators = [];
+	/** @var Simplex */
+	private $noiseBase;
+
+	/** @var BiomeSelector */
+	private $selector;
+
+	private static $GAUSSIAN_KERNEL = null;
+	private static $SMOOTH_SIZE = 2;
+
+	public function __construct(array $options = []){
+		if(self::$GAUSSIAN_KERNEL === null){
+			self::generateKernel();
+		}
+	}
+
+	private static function generateKernel(){
+		self::$GAUSSIAN_KERNEL = [];
+
+		$bellSize = 1 / self::$SMOOTH_SIZE;
+		$bellHeight = 2 * self::$SMOOTH_SIZE;
+
+		for($sx = -self::$SMOOTH_SIZE; $sx <= self::$SMOOTH_SIZE; ++$sx){
+			self::$GAUSSIAN_KERNEL[$sx + self::$SMOOTH_SIZE] = [];
+
+			for($sz = -self::$SMOOTH_SIZE; $sz <= self::$SMOOTH_SIZE; ++$sz){
+				$bx = $bellSize * $sx;
+				$bz = $bellSize * $sz;
+				self::$GAUSSIAN_KERNEL[$sx + self::$SMOOTH_SIZE][$sz + self::$SMOOTH_SIZE] = $bellHeight * exp(-($bx * $bx + $bz * $bz) / 2);
+			}
+		}
+	}
+
+	public function getName(){
+		return "normal";
+	}
+
+	public function getSettings(){
+		return [];
+	}
+
+	public function init(ChunkManager $level, Random $random){
+		$this->level = $level;
+		$this->random = $random;
+		$this->random->setSeed($this->level->getSeed());
+		$this->noiseBase = new Simplex($this->random, 4, 1 / 4, 1 / 64);
+		$this->random->setSeed($this->level->getSeed());
+
+		/*$ores = new Ore();
+		$ores->setOreTypes([
+			new OreType(new CoalOre(), 20, 16, 0, 128),
+			new OreType(New IronOre(), 20, 8, 0, 64),
+			new OreType(new RedstoneOre(), 8, 7, 0, 16),
+			new OreType(new LapisOre(), 1, 6, 0, 32),
+			new OreType(new GoldOre(), 2, 8, 0, 32),
+			new OreType(new DiamondOre(), 1, 7, 0, 16),
+			new OreType(new Dirt(), 20, 32, 0, 128),
+			new OreType(new Gravel(), 10, 16, 0, 128)
+		]);
+		$this->populators[] = $ores;*/
+	}
+
+	public function generateChunk($chunkX, $chunkZ){
+		$this->random->setSeed(0xdeadbeef ^ ($chunkX << 8) ^ $chunkZ ^ $this->level->getSeed());
+
+		$noise = Generator::getFastNoise3D($this->noiseBase, 16, 128, 16, 4, 8, 4, $chunkX * 16, 0, $chunkZ * 16);
+
+		$chunk = $this->level->getChunk($chunkX, $chunkZ);
+
+		for($x = 0; $x < 16; ++$x){
+			for($z = 0; $z < 16; ++$z){
+
+				$biome = Biome::getBiome(Biome::HELL);
+				$chunk->setBiomeId($x, $z, $biome->getId());
+				$color = [0, 0, 0];
+				$bColor = $biome->getColor();
+				$color[0] += (($bColor >> 16) ** 2);
+				$color[1] += ((($bColor >> 8) & 0xff) ** 2);
+				$color[2] += (($bColor & 0xff) ** 2);
+
+				$chunk->setBiomeColor($x, $z, $color[0], $color[1], $color[2]);
+
+				for($y = 0; $y < 128; ++$y){
+					if($y === 0 or $y === 127){
+						$chunk->setBlockId($x, $y, $z, Block::BEDROCK);
+						continue;
+					}
+					$noiseValue = (abs($this->emptyHeight - $y) / $this->emptyHeight) * $this->emptyAmplitude - $noise[$x][$z][$y];
+					$noiseValue -= 1 - $this->density;
+
+					if($noiseValue > 0){
+						$chunk->setBlockId($x, $y, $z, Block::NETHERRACK);
+					}elseif($y <= $this->waterHeight){
+						$chunk->setBlockId($x, $y, $z, Block::STILL_LAVA);
+					}
+				}
+			}
+		}
+
+		foreach($this->generationPopulators as $populator){
+			$populator->populate($this->level, $chunkX, $chunkZ, $this->random);
+		}
+	}
+
+	public function populateChunk($chunkX, $chunkZ){
+		$this->random->setSeed(0xdeadbeef ^ ($chunkX << 8) ^ $chunkZ ^ $this->level->getSeed());
+		foreach($this->populators as $populator){
+			$populator->populate($this->level, $chunkX, $chunkZ, $this->random);
+		}
+
+		$chunk = $this->level->getChunk($chunkX, $chunkZ);
+		$biome = Biome::getBiome($chunk->getBiomeId(7, 7));
+		$biome->populateChunk($this->level, $chunkX, $chunkZ, $this->random);
+	}
+
+	public function getSpawn(){
+		return new Vector3(127.5, 128, 127.5);
+	}
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/level/generator/normal/Normal.php b/src/pocketmine/level/generator/normal/Normal.php
index c2c91084b..1cc445814 100644
--- a/src/pocketmine/level/generator/normal/Normal.php
+++ b/src/pocketmine/level/generator/normal/Normal.php
@@ -33,8 +33,6 @@ use pocketmine\block\RedstoneOre;
 use pocketmine\level\ChunkManager;
 use pocketmine\level\generator\biome\Biome;
 use pocketmine\level\generator\biome\BiomeSelector;
-use pocketmine\level\generator\GenerationChunkManager;
-use pocketmine\level\generator\GenerationManager;
 use pocketmine\level\generator\Generator;
 
 use pocketmine\level\generator\noise\Simplex;