Implemented End Crystal (#4715)

Co-authored-by: Dylan T. <dktapps@pmmp.io>

src/entity/EntityFactory.php

@@ -32,6 +32,7 @@ use pocketmine\data\bedrock\PotionTypeIdMap;
 use pocketmine\data\bedrock\PotionTypeIds;
 use pocketmine\data\SavedDataLoadingException;
 use pocketmine\entity\EntityDataHelper as Helper;
+use pocketmine\entity\object\EndCrystal;
 use pocketmine\entity\object\ExperienceOrb;
 use pocketmine\entity\object\FallingBlock;
 use pocketmine\entity\object\ItemEntity;
@@ -92,6 +93,10 @@ final class EntityFactory{
 			return new Egg(Helper::parseLocation($nbt, $world), null, $nbt);
 		}, ['Egg', 'minecraft:egg']);
 
+		$this->register(EndCrystal::class, function(World $world, CompoundTag $nbt) : EndCrystal{
+			return new EndCrystal(Helper::parseLocation($nbt, $world), $nbt);
+		}, ['EnderCrystal', 'minecraft:ender_crystal']);
+
 		$this->register(EnderPearl::class, function(World $world, CompoundTag $nbt) : EnderPearl{
 			return new EnderPearl(Helper::parseLocation($nbt, $world), null, $nbt);
 		}, ['ThrownEnderpearl', 'minecraft:ender_pearl']);

src/entity/object/EndCrystal.php

@@ -0,0 +1,140 @@
+<?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\entity\object;
+
+use pocketmine\entity\Entity;
+use pocketmine\entity\EntitySizeInfo;
+use pocketmine\entity\Explosive;
+use pocketmine\event\entity\EntityDamageEvent;
+use pocketmine\event\entity\EntityPreExplodeEvent;
+use pocketmine\math\Vector3;
+use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\tag\IntTag;
+use pocketmine\network\mcpe\protocol\types\BlockPosition;
+use pocketmine\network\mcpe\protocol\types\entity\EntityIds;
+use pocketmine\network\mcpe\protocol\types\entity\EntityMetadataCollection;
+use pocketmine\network\mcpe\protocol\types\entity\EntityMetadataFlags;
+use pocketmine\network\mcpe\protocol\types\entity\EntityMetadataProperties;
+use pocketmine\world\Explosion;
+
+class EndCrystal extends Entity implements Explosive{
+	private const TAG_SHOWBASE = "ShowBottom"; //TAG_Byte
+
+	private const TAG_BLOCKTARGET_X = "BlockTargetX"; //TAG_Int
+	private const TAG_BLOCKTARGET_Y = "BlockTargetY"; //TAG_Int
+	private const TAG_BLOCKTARGET_Z = "BlockTargetZ"; //TAG_Int
+
+	public static function getNetworkTypeId() : string{ return EntityIds::ENDER_CRYSTAL; }
+
+	protected bool $showBase = false;
+	protected ?Vector3 $beamTarget = null;
+
+	protected function getInitialSizeInfo() : EntitySizeInfo{ return new EntitySizeInfo(2.0, 2.0); }
+
+	protected function getInitialDragMultiplier() : float{ return 1.0; }
+
+	protected function getInitialGravity() : float{ return 0.0; }
+
+	public function isFireProof() : bool{
+		return true;
+	}
+
+	public function showBase() : bool{
+		return $this->showBase;
+	}
+
+	public function setShowBase(bool $showBase) : void{
+		$this->showBase = $showBase;
+		$this->networkPropertiesDirty = true;
+	}
+
+	public function getBeamTarget() : ?Vector3{
+		return $this->beamTarget;
+	}
+
+	public function setBeamTarget(?Vector3 $beamTarget) : void{
+		$this->beamTarget = $beamTarget;
+		$this->networkPropertiesDirty = true;
+	}
+
+	public function attack(EntityDamageEvent $source) : void{
+		parent::attack($source);
+		if(
+			$source->getCause() !== EntityDamageEvent::CAUSE_VOID &&
+			!$this->isFlaggedForDespawn() &&
+			!$source->isCancelled()
+		){
+			$this->flagForDespawn();
+			$this->explode();
+		}
+	}
+
+	protected function initEntity(CompoundTag $nbt) : void{
+		parent::initEntity($nbt);
+
+		$this->setMaxHealth(1);
+		$this->setHealth(1);
+
+		$this->setShowBase($nbt->getByte(self::TAG_SHOWBASE, 0) === 1);
+
+		if(
+			($beamXTag = $nbt->getTag(self::TAG_BLOCKTARGET_X)) instanceof IntTag &&
+			($beamYTag = $nbt->getTag(self::TAG_BLOCKTARGET_Y)) instanceof IntTag &&
+			($beamZTag = $nbt->getTag(self::TAG_BLOCKTARGET_Z)) instanceof IntTag
+		){
+			$this->setBeamTarget(new Vector3($beamXTag->getValue(), $beamYTag->getValue(), $beamZTag->getValue()));
+		}
+	}
+
+	public function saveNBT() : CompoundTag{
+		$nbt = parent::saveNBT();
+
+		$nbt->setByte(self::TAG_SHOWBASE, $this->showBase ? 1 : 0);
+		if($this->beamTarget !== null){
+			$nbt->setInt(self::TAG_BLOCKTARGET_X, $this->beamTarget->getFloorX());
+			$nbt->setInt(self::TAG_BLOCKTARGET_Y, $this->beamTarget->getFloorY());
+			$nbt->setInt(self::TAG_BLOCKTARGET_Z, $this->beamTarget->getFloorZ());
+		}
+		return $nbt;
+	}
+
+	public function explode() : void{
+		$ev = new EntityPreExplodeEvent($this, 6);
+		$ev->call();
+		if(!$ev->isCancelled()){
+			$explosion = new Explosion($this->getPosition(), $ev->getRadius(), $this);
+			if($ev->isBlockBreaking()){
+				$explosion->explodeA();
+			}
+			$explosion->explodeB();
+		}
+	}
+
+	protected function syncNetworkData(EntityMetadataCollection $properties) : void{
+		parent::syncNetworkData($properties);
+
+		$properties->setGenericFlag(EntityMetadataFlags::SHOWBASE, $this->showBase);
+		$properties->setBlockPos(EntityMetadataProperties::BLOCK_TARGET, BlockPosition::fromVector3($this->beamTarget ?? Vector3::zero()));
+	}
+}

src/entity/projectile/Projectile.php

@@ -28,6 +28,7 @@ use pocketmine\data\SavedDataLoadingException;
 use pocketmine\entity\Entity;
 use pocketmine\entity\Living;
 use pocketmine\entity\Location;
+use pocketmine\entity\object\EndCrystal;
 use pocketmine\event\entity\EntityCombustByEntityEvent;
 use pocketmine\event\entity\EntityDamageByChildEntityEvent;
 use pocketmine\event\entity\EntityDamageByEntityEvent;
@@ -96,7 +97,7 @@ abstract class Projectile extends Entity{
 	}
 
 	public function canCollideWith(Entity $entity) : bool{
-		return $entity instanceof Living && !$this->onGround;
+		return ($entity instanceof Living || $entity instanceof EndCrystal) && !$this->onGround;
 	}
 
 	public function canBeCollidedWith() : bool{