Implemented slime blocks

src/block/BlockFactory.php

@@ -323,7 +323,7 @@ class BlockFactory{
 		$this->register(new SeaLantern(new BID(Ids::SEALANTERN, 0), "Sea Lantern", new BlockBreakInfo(0.3)));
 		$this->register(new SeaPickle(new BID(Ids::SEA_PICKLE, 0), "Sea Pickle", BlockBreakInfo::instant()));
 		$this->register(new Skull(new BID(Ids::MOB_HEAD_BLOCK, 0, ItemIds::SKULL, TileSkull::class), "Mob Head", new BlockBreakInfo(1.0)));
-
+		$this->register(new Slime(new BID(Ids::SLIME, 0), "Slime Block", BlockBreakInfo::instant()));
 		$this->register(new Snow(new BID(Ids::SNOW, 0), "Snow Block", new BlockBreakInfo(0.2, BlockToolType::SHOVEL, ToolTier::WOOD()->getHarvestLevel())));
 		$this->register(new SnowLayer(new BID(Ids::SNOW_LAYER, 0), "Snow Layer", new BlockBreakInfo(0.1, BlockToolType::SHOVEL, ToolTier::WOOD()->getHarvestLevel())));
 		$this->register(new SoulSand(new BID(Ids::SOUL_SAND, 0), "Soul Sand", new BlockBreakInfo(0.5, BlockToolType::SHOVEL)));
@@ -580,7 +580,6 @@ class BlockFactory{
 		//TODO: minecraft:repeating_command_block
 		//TODO: minecraft:scaffolding
 		//TODO: minecraft:seagrass
-		//TODO: minecraft:slime
 		//TODO: minecraft:smithing_table
 		//TODO: minecraft:sticky_piston
 		//TODO: minecraft:stonecutter_block

src/block/Slime.php

@@ -0,0 +1,44 @@
+<?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\block;
+
+use pocketmine\entity\Entity;
+use pocketmine\entity\Living;
+
+final class Slime extends Transparent{
+
+	public function getFrictionFactor() : float{
+		return 0.8; //???
+	}
+
+	public function onEntityLand(Entity $entity) : ?float{
+		if($entity instanceof Living && $entity->isSneaking()){
+			return null;
+		}
+		$entity->resetFallDistance();
+		return -$entity->getMotion()->y;
+	}
+
+	//TODO: slime blocks should slow entities walking on them to about 0.4x original speed
+}

src/block/VanillaBlocks.php

@@ -489,6 +489,7 @@ use function assert;
  * @method static SeaLantern SEA_LANTERN()
  * @method static SeaPickle SEA_PICKLE()
  * @method static ShulkerBox SHULKER_BOX()
+ * @method static Slime SLIME()
  * @method static Furnace SMOKER()
  * @method static Opaque SMOOTH_QUARTZ()
  * @method static Slab SMOOTH_QUARTZ_SLAB()
@@ -1054,6 +1055,7 @@ final class VanillaBlocks{
 		self::register("sea_lantern", $factory->get(169, 0));
 		self::register("sea_pickle", $factory->get(411, 0));
 		self::register("shulker_box", $factory->get(205, 0));
+		self::register("slime", $factory->get(165, 0));
 		self::register("smoker", $factory->get(453, 2));
 		self::register("smooth_quartz", $factory->get(155, 3));
 		self::register("smooth_quartz_slab", $factory->get(421, 1));