Dylan T. dktapps

Before starting

I wrote this specifications/explanation based on PocketMine-MP, Other softwares like Nukkit can be different with PM.

Client Blob Cache

What's the Client Blob Cache

The Client Blob Cache is a new Bedrock optimization - it allows blocks and biomes to be cached on Clients to avoid resending identical chunks over and over. Chunks and biomes make up the vast majority of network traffic in a lot of common cases (eg. login, teleport or dimension switches) but at the same time, they rarely change. Allowing the Client to reuse chunks it has seen in the past can save a ton of traffic and latency!

The Client Cache is a Content Addressed Storage (a bit like git) that stores Blobs and retrieves them based on their full hashes (BlobIds). This means that the cache doesn't actually know about Chunks - in the future, we might start using it for more types of data, like skins or data driven entities.

A nice thing we get from the CAS approach is that the cache is persistent: returning players will be able to reuse content that was sent them in previous sessions or even previous sessions in different servers as long as tha

Block Storage & Network Protocol Changes

Paletted chunks & removing BlockIDs brings a few big changes to how blocks are represented. In Bedrock, Blocks used to be represented by their 8 bit ID and 4 bit data; this means that we can only represent 256 blocks and 16 variants for each block. As it happens we ran out of IDs in Update Aquatic, so we had to do something about it :)

After this change, we can represent infinite types of Blocks and infinite BlockStates, just like in Java. BlockStates are what is sent over the network as they are roughly equivalent to the old ID+data information, eg. they're all the information attached to a block.

BlockStates are serialized in two ways:

PersistentID: a PersistentID is a NBT tag containing the BlockState name and its variant number; for example

Project Proposal for a World Edit Plugin

This proposal describes a world edit plugin largely based on WorldEditArt's originally-intended features, along with some new ideas.

Plugin Name

This plugin will inherit the development of the WorldEditArt project and bring it to the Epsilon phase (WorldEditArt Epsilon).

About Social Stuff

Owner and Developers

This plugin be continued in the LegendOfMCPE/WorldEditArt repository.

Metadata id	Object	Description	Type	Checked
1	Wolf	Tail angle	int
	Boat	Health	int
Minecart	Health	int
2	Entity	Variant	int	👍
FallingBlock	fall damage	int	👍
Slime	size	int	👍
3	Entity	Color (for sheep in particular)	byte	👍
4	Entity	name	string	👍

	<?php
	use pocketmine\plugin\PluginBase;
	use pocketmine\Server;

	/**
	* This class is deliberately meant to be silly
	* Class SpoonDetector
	*/
	class SpoonDetector{

	42 f1 ff ff ff 9f 34 06 00 01 10 32 56 00 ff ff Bñÿÿÿ?4....2V.ÿÿ
	ff ff fe 01 80 02 02 00 00 00 00 00 00 00 00 00 ÿÿþ.?...........
	00 00 00 00 00 00 00 00 00 00 83 d1 ba fa 0f 00 ..........?Ñºú..
	83 d1 ba fa 0f 00 83 d1 ba fa 0f 83 d1 ba fa 0f ?Ñºú..?Ñºú.?Ñºú.
	83 d1 ba fa 0f 83 d1 ba fa 0f 83 d1 ba fa 0f 83 ?Ñºú.?Ñºú.?Ñºú.?
	d1 ba fa 0f 83 d1 ba fa 0f 83 d1 ba fa 0f 83 d1 Ñºú.?Ñºú.?Ñºú.?Ñ
	ba fa 0f 83 d1 ba fa 0f 83 d1 ba fa 0f 83 d1 ba ºú.?Ñºú.?Ñºú.?Ñº
	fa 0f 83 d1 ba fa 0f 90 a1 c2 fc 0f dc 81 80 f8 ú.?Ñºú.¡Âü.Ü?ø
	0f 90 a1 c2 fc 0f 90 a1 c2 fc 0f 83 d1 ba fa 0f .¡Âü.¡Âü.?Ñºú.
	90 a1 c2 fc 0f 90 a1 c2 fc 0f dc 81 80 f8 0f c3 ¡Âü.¡Âü.Ü?ø.Ã

	// To subscribe to an event, pass this JSON text to the client through the WebSocket:

	{
	"body": {
	"eventName": "NameOfEvent" // Replace with an event name listed below
	},
	"header": {
	"requestId": "xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxxxxx", // UUID
	"messagePurpose": "subscribe",
	"version": 1, // Protocol version (currently 1 as-of 1.0.2)

	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - > Receive: 14 (0x0e): McpeAddEntity
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - McpeAddEntity Entity ID: -51539607504
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - McpeAddEntity Runtime Entity ID: 56
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Entity Type: 2869 - 0xb35
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Entity Family: 11 - 0x0b
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Entity Type ID: 53 - 0x35 EnderDragon
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - X: 57.99719
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Y: 4.06
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Z: 9.940071
	2016-11-12 13:48:08,026 DEBUG MiNET.Client.MiNetClient - Yaw: 0

	{
	"commandName": "help",
	"commandOverload": "byPage",
	"unkown1": 0,
	"unkown2": 0,
	"unkown4": false,
	"unkown5": -1,
	"commandJson": "null\n",
	"unkown6": "null\n",
	"unkown7": 0,