New way to spawn entities/tiles using a global register table, allow overriding default entity/tile classes via classes

src/pocketmine/entity/FallingSand.php

@@ -0,0 +1,168 @@
+<?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\entity;
+
+
+use pocketmine\block\Block;
+use pocketmine\event\entity\EntityBlockChangeEvent;
+use pocketmine\event\entity\EntityDamageEvent;
+use pocketmine\event\entity\EntityRegainHealthEvent;
+use pocketmine\item\Item;
+use pocketmine\math\Vector3;
+use pocketmine\nbt\tag\Byte;
+use pocketmine\nbt\tag\Int;
+use pocketmine\nbt\tag\String;
+use pocketmine\network\protocol\AddEntityPacket;
+use pocketmine\network\protocol\SetEntityMotionPacket;
+use pocketmine\Player;
+
+class FallingSand extends Entity{
+	const NETWORK_ID = 66;
+
+	public $width = 0.98;
+	public $length = 0.98;
+	public $height = 0.98;
+
+	protected $gravity = 0.04;
+	protected $drag = 0.02;
+	protected $blockId = 0;
+	protected $damage;
+
+	public $canCollide = false;
+
+	protected function initEntity(){
+		$this->namedtag->id = new String("id", "FallingSand");
+		if(isset($this->namedtag->TileID)){
+			$this->blockId = $this->namedtag["TileID"];
+		}elseif(isset($this->namedtag->Tile)){
+			$this->blockId = $this->namedtag["Tile"];
+			$this->namedtag["TileID"] = new Int("TileID", $this->blockId);
+		}
+
+		if($this->blockId === 0){
+			$this->close();
+		}
+	}
+
+	public function canCollideWith(Entity $entity){
+		return false;
+	}
+
+	public function getData(){
+		return [];
+	}
+
+	public function onUpdate($currentTick){
+
+		if($this->closed){
+			return false;
+		}
+
+		$this->timings->startTiming();
+
+		$tickDiff = max(1, $currentTick - $this->lastUpdate);
+		$this->lastUpdate = $currentTick;
+
+		$hasUpdate = $this->entityBaseTick($tickDiff);
+
+		if(!$this->dead){
+			if($this->ticksLived === 1){
+				$block = $this->level->getBlock($pos = Vector3::cloneVector($this)->floor());
+				if($block->getID() != $this->blockId){
+					$this->kill();
+					return true;
+				}
+				$this->level->setBlock($pos, Block::get(0), true);
+
+			}
+
+			$this->motionY -= $this->gravity;
+
+			$this->move($this->motionX, $this->motionY, $this->motionZ);
+
+			$friction = 1 - $this->drag;
+
+			$this->motionX *= $friction;
+			$this->motionY *= 1 - $this->drag;
+			$this->motionZ *= $friction;
+
+			$pos = Vector3::cloneVector($this)->floor();
+
+			if($this->onGround){
+				$this->kill();
+				$block = $this->level->getBlock($pos);
+				if(!$block->isFullBlock){
+					$this->getLevel()->dropItem($this, Item::get($this->getBlock(), $this->getDamage(), 1));
+				}else{
+					$this->server->getPluginManager()->callEvent($ev = EntityBlockChangeEvent::createEvent($this, $block, Block::get($this->getBlock(), $this->getDamage())));
+					if(!$ev->isCancelled()){
+						$this->getLevel()->setBlock($pos, $ev->getTo(), true);
+					}
+				}
+				$hasUpdate = true;
+			}
+
+			$this->updateMovement();
+		}
+
+		return $hasUpdate or !$this->onGround or $this->motionX != 0 or $this->motionY != 0 or $this->motionZ != 0;
+	}
+
+	public function getBlock(){
+		return $this->blockId;
+	}
+	public function getDamage(){
+		return $this->damage;
+	}
+
+	public function saveNBT(){
+		$this->namedtag->TileID = new Int("TileID", $this->blockId);
+		$this->namedtag->Data = new Byte("Data", $this->damage);
+	}
+
+	public function attack($damage, $source = EntityDamageEvent::CAUSE_MAGIC){
+
+	}
+
+	public function heal($amount, $source = EntityRegainHealthEvent::CAUSE_MAGIC){
+
+	}
+
+	public function spawnTo(Player $player){
+		$pk = AddEntityPacket::getFromPool();
+		$pk->type = FallingSand::NETWORK_ID;
+		$pk->eid = $this->getID();
+		$pk->x = $this->x;
+		$pk->y = $this->y;
+		$pk->z = $this->z;
+		$pk->did = -$this->getBlock();
+		$player->dataPacket($pk);
+
+		$pk = SetEntityMotionPacket::getFromPool();
+		$pk->entities = [
+			[$this->getID(), $this->motionX, $this->motionY, $this->motionZ]
+		];
+		$player->dataPacket($pk);
+
+		parent::spawnTo($player);
+	}
+}