Difference between revisions of "Pre-release protocol"

Revision as of 17:09, 16 January 2020

This page documents the changes from the last stable Minecraft release (currently 1.14.4, protocol 498) to the current pre-release (currently 1.15.2-pre2, protocol 577). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.

ID	Packet name	Documentation
Handshaking serverbound
0x00	Handshake	Current	Pre
Play clientbound
0x03	Spawn Mob	Current	Pre
0x05	Spawn Player	Current	Pre
~~0x5C~~ 0x08	Acknowledge Player Digging	Current	(unchanged)
~~0x08~~ 0x09	Block Break Animation	Current	(unchanged)
~~0x09~~ 0x0A	Update Block Entity	Current	Pre
~~0x0A~~ 0x0B	Block Action	Current	(unchanged)
~~0x0B~~ 0x0C	Block Change	Current	(unchanged)
~~0x0C~~ 0x0D	Boss Bar	Current	(unchanged)
~~0x0D~~ 0x0E	Server Difficulty	Current	(unchanged)
~~0x0E~~ 0x0F	Chat Message (clientbound)	Current	(unchanged)
~~0x0F~~ 0x10	Multi Block Change	Current	(unchanged)
~~0x10~~ 0x11	Tab-Complete (clientbound)	Current	(unchanged)
~~0x11~~ 0x12	Declare Commands	Current	(unchanged)
~~0x12~~ 0x13	Confirm Transaction (clientbound)	Current	(unchanged)
~~0x13~~ 0x14	Close Window (clientbound)	Current	(unchanged)
~~0x14~~ 0x15	Window Items	Current	(unchanged)
~~0x15~~ 0x16	Window Property	Current	(unchanged)
~~0x16~~ 0x17	Set Slot	Current	(unchanged)
~~0x17~~ 0x18	Set Cooldown	Current	(unchanged)
~~0x18~~ 0x19	Plugin Message (clientbound)	Current	(unchanged)
~~0x19~~ 0x1A	Named Sound Effect	Current	(unchanged)
~~0x1A~~ 0x1B	Disconnect (play)	Current	(unchanged)
~~0x1B~~ 0x1C	Entity Status	Current	(unchanged)
~~0x1C~~ 0x1D	Explosion	Current	(unchanged)
~~0x1D~~ 0x1E	Unload Chunk	Current	(unchanged)
~~0x1E~~ 0x1F	Change Game State	Current	Pre
~~0x1F~~ 0x20	Open Horse Window	Current	(unchanged)
~~0x20~~ 0x21	Keep Alive (clientbound)	Current	(unchanged)
~~0x21~~ 0x22	Chunk Data	Current	Pre
~~0x22~~ 0x23	Effect	Current	(unchanged)
~~0x23~~ 0x24	Particle	Current	Pre
~~0x24~~ 0x25	Update Light	Current	(unchanged)
~~0x25~~ 0x26	Join Game	Current	Pre
~~0x26~~ 0x27	Map Data	Current	(unchanged)
~~0x27~~ 0x28	Trade List	Current	(unchanged)
~~0x28~~ 0x29	Entity Relative Move	Current	(unchanged)
~~0x29~~ 0x2A	Entity Look And Relative Move	Current	(unchanged)
~~0x2A~~ 0x2B	Entity Look	Current	(unchanged)
~~0x2B~~ 0x2C	Entity	Current	(unchanged)
~~0x2C~~ 0x2D	Vehicle Move (clientbound)	Current	(unchanged)
~~0x2D~~ 0x2E	Open Book	Current	(unchanged)
~~0x2E~~ 0x2F	Open Window	Current	(unchanged)
~~0x2F~~ 0x30	Open Sign Editor	Current	(unchanged)
~~0x30~~ 0x31	Craft Recipe Response	Current	(unchanged)
~~0x31~~ 0x32	Player Abilities (clientbound)	Current	(unchanged)
~~0x32~~ 0x33	Combat Event	Current	(unchanged)
~~0x33~~ 0x34	Player Info	Current	(unchanged)
~~0x34~~ 0x35	Face Player	Current	(unchanged)
~~0x35~~ 0x36	Player Position And Look (clientbound)	Current	(unchanged)
~~0x36~~ 0x37	Unlock Recipes	Current	(unchanged)
~~0x37~~ 0x38	Destroy Entities	Current	(unchanged)
~~0x38~~ 0x39	Remove Entity Effect	Current	(unchanged)
~~0x39~~ 0x3A	Resource Pack Send	Current	(unchanged)
~~0x3A~~ 0x3B	Respawn	Current	Pre
~~0x3B~~ 0x3C	Entity Head Look	Current	(unchanged)
~~0x3C~~ 0x3D	Select Advancement Tab	Current	(unchanged)
~~0x3D~~ 0x3E	World Border	Current	(unchanged)
~~0x3E~~ 0x3F	Camera	Current	(unchanged)
~~0x3F~~ 0x40	Held Item Change (clientbound)	Current	(unchanged)
~~0x40~~ 0x41	Update View Position	Current	(unchanged)
~~0x41~~ 0x42	Update View Distance	Current	(unchanged)
~~0x42~~ 0x43	Display Scoreboard	Current	(unchanged)
~~0x43~~ 0x44	Entity Metadata	Current	(unchanged)
~~0x44~~ 0x45	Attach Entity	Current	(unchanged)
~~0x45~~ 0x46	Entity Velocity	Current	(unchanged)
~~0x46~~ 0x47	Entity Equipment	Current	(unchanged)
~~0x47~~ 0x48	Set Experience	Current	(unchanged)
~~0x48~~ 0x49	Update Health	Current	(unchanged)
~~0x49~~ 0x4A	Scoreboard Objective	Current	(unchanged)
~~0x4A~~ 0x4B	Set Passengers	Current	(unchanged)
~~0x4B~~ 0x4C	Teams	Current	(unchanged)
~~0x4C~~ 0x4D	Update Score	Current	(unchanged)
~~0x4D~~ 0x4E	Spawn Position	Current	(unchanged)
~~0x4E~~ 0x4F	Time Update	Current	(unchanged)
~~0x4F~~ 0x50	Title	Current	(unchanged)
~~0x50~~ 0x51	Entity Sound Effect	Current	(unchanged)
~~0x51~~ 0x52	Sound Effect	Current	(unchanged)
~~0x52~~ 0x53	Stop Sound	Current	(unchanged)
~~0x53~~ 0x54	Player List Header And Footer	Current	(unchanged)
~~0x54~~ 0x55	NBT Query Response	Current	(unchanged)
~~0x55~~ 0x56	Collect Item	Current	(unchanged)
~~0x56~~ 0x57	Entity Teleport	Current	(unchanged)
~~0x57~~ 0x58	Advancements	Current	(unchanged)
~~0x58~~ 0x59	Entity Properties	Current	(unchanged)
~~0x59~~ 0x5A	Entity Effect	Current	(unchanged)
~~0x5A~~ 0x5B	Declare Recipes	Current	(unchanged)
~~0x5B~~ 0x5C	Tags	Current	(unchanged)

New/modified data types

No changes so far.

Entity Metadata

Lots of shifts, of course

Living

Extends Entity.

Index	Type	Meaning		Default
7	Byte	Hand states, used to trigger blocking/eating/drinking animation.		0
		Bit mask	Meaning
		0x01	Is hand active
		0x02	Active hand (0 = main hand, 1 = offhand)
		0x04	In riptide spin attack
8	Float	Health		1.0
9	VarInt	Potion effect color (or 0 if there is no effect)		0
10	Boolean	Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount		false
11	VarInt	Number of arrows in entity		0
12	VarInt	Health added by absorption (based on the AbsorptionAmount tag)		0
12 13	OptBlockPos	Sleeping location (from SleepingX, SleepingY, SleepingZ tags)		Absent

Bee

Extends Insentient.

Index	Type	Meaning		Default
16	Byte	Flags		0
		0x01	Unused
		0x02	Is angry
		0x04	Has stung
		0x08	Has nectar
17	VarInt	Anger time in ticks		0 (Not angry)

Wolf

Extends TameableAnimal.

Index	Type	Meaning	Default
17	Float	Damage taken (used for tail rotation)	Value of health field (1.0)
18	Boolean	Is begging	false
19	VarInt	Collar color (values are those used with dyes)	14 (Red)

Enderman

Extends Monster.

Index	Type	Meaning	Default
14 15	Opt BlockID	Carried block	Absent
15 16	Boolean	Is screaming	false
17	Boolean	Is stared at	false

Trident

Extends TameableAnimal.

Index	Type	Meaning		Default
10	VarInt	Loyalty level (enchantment)		0
11	Boolean	Has enchantment glint		False

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Spawn Mob

Sent by the server when a mob entity is spawned.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x03	Play	Client	Entity ID	VarInt
			Entity UUID	UUID
			Type	VarInt	The type of mob. See Entities#Mobs
			X	Double
			Y	Double
			Z	Double
			Yaw	Angle
			Pitch	Angle
			Head Pitch	Angle
			Velocity X	Short	Same units as Entity Velocity
			Velocity Y	Short	Same units as Entity Velocity
			Velocity Z	Short	Same units as Entity Velocity
			Metadata	Entity Metadata

Spawn Player

This packet is sent by the server when a player comes into visible range, not when a player joins.

This packet must be sent after the Player Info packet that adds the player data for the client to use when spawning a player. If the Player Info for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player Info packet includes skin/cape data.

Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x05	Play	Client	Entity ID	VarInt	Player's EID
			Player UUID	UUID	See below for notes on offline mode and NPCs
			X	Double
			Y	Double
			Z	Double
			Yaw	Angle
			Pitch	Angle
			Metadata	Entity Metadata

When in online mode, the UUIDs must be valid and have valid skin blobs.

In offline mode, UUID v3 is used with the String OfflinePlayer:<player name>, encoded in UTF-8 (and case-sensitive).

For NPCs UUID v2 should be used. Note:

<+Grum> i will never confirm this as a feature you know that :)

In an example UUID, xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx, the UUID version is specified by Y. So, for UUID v3, Y will always be 3, and for UUID v2, Y will always be 2.

Update Block Entity

Sets the block entity associated with the block at the given location.

Packet ID	State	Bound To	Field Name	Field Type	Notes
~~0x09~~ 0x0A	Play	Client	Location	Position
			Action	Unsigned Byte	The type of update to perform, see below
			NBT Data	NBT Tag	Data to set. May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)

Action field:

1: Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
2: Set command block text (command and last execution status)
3: Set the level, primary, and secondary powers of a beacon
4: Set rotation and skin of mob head
5: Declare a conduit
6: Set base color and patterns on a banner
7: Set the data for a Structure tile entity
8: Set the destination for a end gateway
9: Set the text on a sign
10: Unused
11: Declare a bed
12: Set data of a jigsaw block
13: Set items in a campfire
14: Beehive information

Change Game State

Used for a wide variety of game state things, from whether to bed use to gamemode to demo messages.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x1F	Play	Client	Reason	Unsigned Byte	See below
0x1F	Play	Client	Value	Float	Depends on Reason

Reason codes:

Reason	Effect	Value
0	Invalid Bed	Would be used to switch between messages, but the only used message is 0 for invalid bed
1	End raining
2	Begin raining
3	Change gamemode	0: Survival, 1: Creative, 2: Adventure, 3: Spectator
4	Exit end	0: Immediately send Client Status of respawn without showing end credits; 1: Show end credits and respawn at the end (or when esc is pressed). 1 is sent if the player has not yet received the "The end?" advancement, while if they do have it 0 is used.
5	Demo message	0: Show welcome to demo screen, 101: Tell movement controls, 102: Tell jump control, 103: Tell inventory control
6	Arrow hitting player	Appears to be played when an arrow strikes another player in Multiplayer
7	Fade value	The current darkness value. 1 = Dark, 0 = Bright, Setting the value higher causes the game to change color and freeze
8	Fade time	Time in ticks for the sky to fade
9	Play pufferfish sting sound
10	Play elder guardian mob appearance (effect and sound)
11	Enable respawn screen	0: Enable respawn screen, 1: Immediately respawn (sent when the doImmediateRespawn gamerule changes)

Chunk Data

Main article: Chunk Format

See also: #Unload Chunk

	The following information needs to be added to this page:
	How do biomes work now? The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed... (/r/mojira discussion which notes that it seems to be some kind of interpolation, and 3D biomes are only used in the nether)

The server only sends skylight information for chunk pillars in the Overworld, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent. This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with Update Block Entity later).

Packet ID	State	Bound To	Field Name	Field Type	Notes
~~0x21~~ 0x22	Play	Client	Chunk X	Int	Chunk coordinate (block coordinate divided by 16, rounded down)
			Chunk Z	Int	Chunk coordinate (block coordinate divided by 16, rounded down)
			Full chunk	Boolean	See Chunk Format
			Primary Bit Mask	VarInt	Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
			Heightmaps	NBT	Compound containing one long array named `MOTION_BLOCKING`, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a `WORLD_SURFACE` long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
			Biomes	Optional array of Integer	1024 biome IDs, ordered by x then z then d, in 4×4×4 blocks. Not present if full chunk is false.
			Size	VarInt	Size of Data in bytes
			Data	Byte array	See data structure in Chunk Format
			Number of block entities	VarInt	Number of elements in the following array
			Block entities	Array of NBT Tag	All block entities in the chunk. Use the x, y, and z tags in the NBT to determine their positions.

Note that the Notchian client requires an Update View Position packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.

To get the biome at a coordinate, use biomes[((y >> 2) & 63) << 4 | ((z >> 2) & 3) << 2 | ((x >> 2) & 3)]

Data structure

The data section of the packet contains most of the useful data for the chunk.

Field Name	Field Type	Notes
Data	Array of Chunk Section	The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
Biomes	Optional Int Array	Only sent if full chunk is true; 256 entries if present

Particle

Displays the named particle.

Packet ID	State	Bound To	Field Name	Field Type	Notes
~~0x23~~ 0x24	Play	Client	Particle ID	Int	The particle ID listed in the particle data type.
			Long Distance	Boolean	If true, particle distance increases from 256 to 65536
			X	~~Float~~ Double	X position of the particle
			Y	~~Float~~ Double	Y position of the particle
			Z	~~Float~~ Double	Z position of the particle
			Offset X	Float	This is added to the X position after being multiplied by random.nextGaussian()
			Offset Y	Float	This is added to the Y position after being multiplied by random.nextGaussian()
			Offset Z	Float	This is added to the Z position after being multiplied by random.nextGaussian()
			Particle Data	Float	The data of each particle
			Particle Count	Int	The number of particles to create
			Data	Varies	The variable data listed in the particle data type.

Join Game

See Protocol Encryption for information on logging in.

Packet ID	State	Bound To	Field Name	Field Type	Notes
~~0x25~~ 0x26	Play	Client	Entity ID	Int	The player's Entity ID (EID)
			Gamemode	Unsigned Byte	0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
			Dimension	Int Enum	-1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed.
			Max Players	Unsigned Byte	Was once used by the client to draw the player list, but now is ignored
			Level Type	String Enum (16)	default, flat, largeBiomes, amplified, customized, buffet, default_1_1
			View Distance	VarInt	Render distance (2-32)
			Reduced Debug Info	Boolean	If true, a Notchian client shows reduced information on the debug screen. For servers in development, this should almost always be false.
			Enable respawn screen	Boolean	Set to false when the doImmediateRespawn gamerule is true

Respawn

To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.

Packet ID	State	Bound To	Field Name	Field Type	Notes
~~0x3A~~ 0x3B	Play	Client	Dimension	Int Enum	-1: The Nether, 0: The Overworld, 1: The End
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed.
			Gamemode	Unsigned Byte	0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
			Level Type	String (16)	Same as Join Game

Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).

If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.

Serverbound

No changes so far.

Handshaking

Clientbound

There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.

Serverbound

Handshake

This causes the server to switch into the target state.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x00	Handshaking	Server	Protocol Version	VarInt	See protocol version numbers (currently ~~498~~ 577)
			Server Address	String	Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a complete redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide mc.example.org as server address in addition to connecting to it.
			Server Port	Unsigned Short	Default is 25565. The Notchian server does not use this information.
			Next State	VarInt Enum	1 for status, 2 for login

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.

@@ Line 1: / Line 1: @@
-This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.13.2, protocol 404]]) to the current pre-release (currently [[Protocol version numbers|1.14.4, protocol 498]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.14.4, protocol 498]]) to the current pre-release (currently [[Protocol version numbers|1.15.2-pre2, protocol 577]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
 One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
@@ Line 9: / Line 9: @@
 === Data types ===
-==== Position ====
+No changes so far.
--bit value split in to three parts
-* x: 26 MSBs
-* z: 26 {{change|LSBs|middle bits}}
-* y: 12 {{change|bits between them|LSBs}}
-Encoded as followed:
- ((x & 0x3FFFFFF) << 38) | {{change|((y & 0xFFF) << 26) {{!}} (z & 0x3FFFFFF)|((z & 0x3FFFFFF) << 12) {{!}} (y & 0xFFF)}}
-And decoded as:
- val = read_unsigned_long();
- x = val >> 38;
- y = {{change|(val >> 26) & 0xFFF|val & 0xFFF}};
- z = {{change|val << 38 >> 38|(val << 26 >> 38)}};
-Note: The details of bit shifting are rather language dependent; the above may work in Java but probably won't in other languages without some tweaking. In particular, you will usually receive positive numbers even if the actual coordinates are negative. This can be fixed by adding something like the following:
- if x >= 2^25 { x -= 2^26 }
- if y >= 2^11 { y -= 2^12 }
- if z >= 2^25 { z -= 2^26 }
-==== Particle ====
-{| class="wikitable"
- |-
- ! Particle Name
- ! Particle ID
- ! Data
- |-
- | <code>minecraft:falling_lava</code>
- | {{change||10}}
- | None
- |-
- | <code>minecraft:landing_lava</code>
- | {{change||11}}
- | None
- |-
- | <code>minecraft:dripping_water</code>
- | {{change|10|12}}
- | None
- |-
- | <code>minecraft:falling_water</code>
- | {{change||13}}
- | None
- |-
- | <code>minecraft:dust</code>
- | {{change|11|14}}
- | None
- |-
- | <code>minecraft:effect</code>
- | {{change|12|15}}
- | None
- |-
- | <code>minecraft:elder_guardian</code>
- | {{change|13|16}}
- | None
- |-
- | <code>minecraft:enchanted_hit</code>
- | {{change|14|17}}
- | None
- |-
- | <code>minecraft:enchant</code>
- | {{change|15|18}}
- | None
- |-
- | <code>minecraft:end_rod</code>
- | {{change|16|19}}
- | None
- |-
- | <code>minecraft:entity_effect</code>
- | {{change|17|20}}
- | None
- |-
- | <code>minecraft:explosion_emitter</code>
- | {{change|18|21}}
- | None
- |-
- | <code>minecraft:explosion</code>
- | {{change|19|22}}
- | None
- |-
- | <code>minecraft:falling_dust</code>
- | {{change|20|23}}
- | None
- |-
- | <code>minecraft:firework</code>
- | {{change|21|24}}
- | None
- |-
- | <code>minecraft:fishing</code>
- | {{change|22|25}}
- | None
- |-
- | <code>minecraft:flame</code>
- | {{change|23|26}}
- | None
- |-
- | <code>minecraft:flash</code>
- | {{change||27}}
- | None
- |-
- | <code>minecraft:happy_villager</code>
- | {{change|24|28}}
- | None
- |-
- | <code>minecraft:composter</code>
- | {{change||29}}
- | None
- |-
- | <code>minecraft:heart</code>
- | {{change|25|30}}
- | None
- |-
- | <code>minecraft:instant_effect</code>
- | {{change|26|31}}
- | None
- |-
- | <code>minecraft:item</code>
- | {{change|27|32}}
- | None
- |-
- | <code>minecraft:item_slime</code>
- | {{change|28|33}}
- | None
- |-
- | <code>minecraft:item_snowball</code>
- | {{change|29|34}}
- | None
- |-
- | <code>minecraft:large_smoke</code>
- | {{change|30|35}}
- | None
- |-
- | <code>minecraft:lava</code>
- | {{change|31|36}}
- | None
- |-
- | <code>minecraft:mycelium</code>
- | {{change|32|37}}
- | None
- |-
- | <code>minecraft:note</code>
- | {{change|33|38}}
- | None
- |-
- | <code>minecraft:poof</code>
- | {{change|34|39}}
- | None
- |-
- | <code>minecraft:portal</code>
- | {{change|35|40}}
- | None
- |-
- | <code>minecraft:rain</code>
- | {{change|36|41}}
- | None
- |-
- | <code>minecraft:smoke</code>
- | {{change|37|42}}
- | None
- |-
- | <code>minecraft:sneeze</code>
- | {{change||43}}
- | None
- |-
- | <code>minecraft:spit</code>
- | {{change|38|44}}
- | None
- |-
- | <code>minecraft:squid_ink</code>
- | {{change|39|45}}
- | None
- |-
- | <code>minecraft:sweep_attack</code>
- | {{change|40|46}}
- | None
- |-
- | <code>minecraft:totem_of_undying</code>
- | {{change|41|47}}
- | None
- |-
- | <code>minecraft:underwater</code>
- | {{change|42|48}}
- | None
- |-
- | <code>minecraft:splash</code>
- | {{change|43|49}}
- | None
- |-
- | <code>minecraft:witch</code>
- | {{change|44|50}}
- | None
- |-
- | <code>minecraft:bubble_pop</code>
- | {{change|45|51}}
- | None
- |-
- | <code>minecraft:current_down</code>
- | {{change|46|52}}
- | None
- |-
- | <code>minecraft:bubble_column_up</code>
- | {{change|47|53}}
- | None
- |-
- | <code>minecraft:nautilus</code>
- | {{change|48|54}}
- | None
- |-
- | <code>minecraft:dolphin</code>
- | {{change|49|55}}
- | None
- |-
- | <code>minecraft:campfire_cosy_smoke</code>
- | {{change||56}}
- | None
- |-
- | <code>minecraft:campfire_signal_smoke</code>
- | {{change||57}}
- | None
- |}
 === Packets ===
@@ Line 246: / Line 21: @@
 {{PacketList|0x00|Handshake}}
   |-
-!colspan="4"| Play serverbound
+!colspan="4"| Play clientbound
-{{PacketList|0x00|Teleport Confirm|pre=unchanged}}
+{{PacketList|0x03|Spawn Mob}}
-{{PacketList|0x01|Query Block NBT|pre=unchanged}}
+{{PacketList|0x05|Spawn Player}}
-{{PacketList|0x02|Set Difficulty}}
+{{PacketList|{{change|0x5C|0x08}}|Acknowledge Player Digging|pre=unchanged}}
-{{PacketList|{{change|0x02|0x03}}|Chat Message (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
-{{PacketList|{{change|0x03|0x04}}|Client Status|pre=unchanged}}
+{{PacketList|{{change|0x09|0x0A}}|Update Block Entity}}
-{{PacketList|{{change|0x04|0x05}}|Client Settings|pre=unchanged}}
+{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
-{{PacketList|{{change|0x05|0x06}}|Tab-Complete (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
-{{PacketList|{{change|0x06|0x07}}|Confirm Transaction (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
-{{PacketList|{{change|0x07|0x08}}|Click Window Button}}
+{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
-{{PacketList|{{change|0x08|0x09}}|Click Window|pre=unchanged}}
+{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x09|0x0A}}|Close Window (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x0F|0x10}}|Multi Block Change|pre=unchanged}}
-{{PacketList|{{change|0x0A|0x0B}}|Plugin Message (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x10|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x0B|0x0C}}|Edit Book|pre=unchanged}}
+{{PacketList|{{change|0x11|0x12}}|Declare Commands|pre=unchanged}}
-{{PacketList|{{change|0x0C|0x0D}}|Query Entity NBT|pre=unchanged}}
+{{PacketList|{{change|0x12|0x13}}|Confirm Transaction (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x0D|0x0E}}|Use Entity|pre=unchanged}}
+{{PacketList|{{change|0x13|0x14}}|Close Window (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x0E|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
-{{PacketList|0x10|Lock Difficulty}}
+{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
-{{PacketList|{{change|0x10|0x11}}|Player Position|pre=unchanged}}
+{{PacketList|{{change|0x16|0x17}}|Set Slot|pre=unchanged}}
-{{PacketList|{{change|0x11|0x12}}|Player Position And Look (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
-{{PacketList|{{change|0x12|0x13}}|Player Look|pre=unchanged}}
+{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x0F|0x14}}|Player|pre=unchanged}}
+{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect|pre=unchanged}}
-{{PacketList|{{change|0x13|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
-{{PacketList|{{change|0x14|0x16}}|Steer Boat|pre=unchanged}}
+{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
-{{PacketList|{{change|0x15|0x17}}|Pick Item|pre=unchanged}}
+{{PacketList|{{change|0x1C|0x1D}}|Explosion|pre=unchanged}}
-{{PacketList|{{change|0x16|0x18}}|Craft Recipe Request|pre=unchanged}}
+{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
-{{PacketList|{{change|0x17|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x1E|0x1F}}|Change Game State}}
-{{PacketList|{{change|0x18|0x1A}}|Player Digging|pre=unchanged}}
+{{PacketList|{{change|0x1F|0x20}}|Open Horse Window|pre=unchanged}}
-{{PacketList|{{change|0x19|0x1B}}|Entity Action|pre=unchanged}}
+{{PacketList|{{change|0x20|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x1A|0x1C}}|Steer Vehicle|pre=unchanged}}
+{{PacketList|{{change|0x21|0x22}}|Chunk Data}}
-{{PacketList|{{change|0x1B|0x1D}}|Recipe Book Data}}
+{{PacketList|{{change|0x22|0x23}}|Effect|pre=unchanged}}
-{{PacketList|{{change|0x1C|0x1E}}|Name Item|pre=unchanged}}
+{{PacketList|{{change|0x23|0x24}}|Particle}}
-{{PacketList|{{change|0x1D|0x1F}}|Resource Pack Status|pre=unchanged}}
+{{PacketList|{{change|0x24|0x25}}|Update Light|pre=unchanged}}
-{{PacketList|{{change|0x1E|0x20}}|Advancement Tab|pre=unchanged}}
+{{PacketList|{{change|0x25|0x26}}|Join Game}}
-{{PacketList|{{change|0x1F|0x21}}|Select Trade|pre=unchanged}}
+{{PacketList|{{change|0x26|0x27}}|Map Data|pre=unchanged}}
-{{PacketList|{{change|0x20|0x22}}|Set Beacon Effect|pre=unchanged}}
+{{PacketList|{{change|0x27|0x28}}|Trade List|pre=unchanged}}
-{{PacketList|{{change|0x21|0x23}}|Held Item Change (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x28|0x29}}|Entity Relative Move|pre=unchanged}}
-{{PacketList|{{change|0x22|0x24}}|Update Command Block|pre=unchanged}}
+{{PacketList|{{change|0x29|0x2A}}|Entity Look And Relative Move|pre=unchanged}}
-{{PacketList|{{change|0x23|0x25}}|Update Command Block Minecart|pre=unchanged}}
+{{PacketList|{{change|0x2A|0x2B}}|Entity Look|pre=unchanged}}
-{{PacketList|{{change|0x24|0x26}}|Creative Inventory Action|pre=unchanged}}
+{{PacketList|{{change|0x2B|0x2C}}|Entity|pre=unchanged}}
-{{PacketList|0x27|Update Jigsaw Block|rel=added}}
+{{PacketList|{{change|0x2C|0x2D}}|Vehicle Move (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x25|0x28}}|Update Structure Block|pre=unchanged}}
+{{PacketList|{{change|0x2D|0x2E}}|Open Book|pre=unchanged}}
-{{PacketList|{{change|0x26|0x29}}|Update Sign|pre=unchanged}}
+{{PacketList|{{change|0x2E|0x2F}}|Open Window|pre=unchanged}}
-{{PacketList|{{change|0x27|0x2A}}|Animation (serverbound)|pre=unchanged}}
+{{PacketList|{{change|0x2F|0x30}}|Open Sign Editor|pre=unchanged}}
-{{PacketList|{{change|0x28|0x2B}}|Spectate|pre=unchanged}}
+{{PacketList|{{change|0x30|0x31}}|Craft Recipe Response|pre=unchanged}}
-{{PacketList|{{change|0x29|0x2C}}|Player Block Placement}}
+{{PacketList|{{change|0x31|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
-{{PacketList|{{change|0x2A|0x2D}}|Use Item|pre=unchanged}}
+{{PacketList|{{change|0x32|0x33}}|Combat Event|pre=unchanged}}
+{{PacketList|{{change|0x33|0x34}}|Player Info|pre=unchanged}}
+{{PacketList|{{change|0x34|0x35}}|Face Player|pre=unchanged}}
+{{PacketList|{{change|0x35|0x36}}|Player Position And Look (clientbound)|pre=unchanged}}
+{{PacketList|{{change|0x36|0x37}}|Unlock Recipes|pre=unchanged}}
+{{PacketList|{{change|0x37|0x38}}|Destroy Entities|pre=unchanged}}
+{{PacketList|{{change|0x38|0x39}}|Remove Entity Effect|pre=unchanged}}
+{{PacketList|{{change|0x39|0x3A}}|Resource Pack Send|pre=unchanged}}
+{{PacketList|{{change|0x3A|0x3B}}|Respawn}}
+{{PacketList|{{change|0x3B|0x3C}}|Entity Head Look|pre=unchanged}}
+{{PacketList|{{change|0x3C|0x3D}}|Select Advancement Tab|pre=unchanged}}
+{{PacketList|{{change|0x3D|0x3E}}|World Border|pre=unchanged}}
+{{PacketList|{{change|0x3E|0x3F}}|Camera|pre=unchanged}}
+{{PacketList|{{change|0x3F|0x40}}|Held Item Change (clientbound)|pre=unchanged}}
+{{PacketList|{{change|0x40|0x41}}|Update View Position|pre=unchanged}}
+{{PacketList|{{change|0x41|0x42}}|Update View Distance|pre=unchanged}}
+{{PacketList|{{change|0x42|0x43}}|Display Scoreboard|pre=unchanged}}
+{{PacketList|{{change|0x43|0x44}}|Entity Metadata|pre=unchanged}}
+{{PacketList|{{change|0x44|0x45}}|Attach Entity|pre=unchanged}}
+{{PacketList|{{change|0x45|0x46}}|Entity Velocity|pre=unchanged}}
+{{PacketList|{{change|0x46|0x47}}|Entity Equipment|pre=unchanged}}
+{{PacketList|{{change|0x47|0x48}}|Set Experience|pre=unchanged}}
+{{PacketList|{{change|0x48|0x49}}|Update Health|pre=unchanged}}
+{{PacketList|{{change|0x49|0x4A}}|Scoreboard Objective|pre=unchanged}}
+{{PacketList|{{change|0x4A|0x4B}}|Set Passengers|pre=unchanged}}
+{{PacketList|{{change|0x4B|0x4C}}|Teams|pre=unchanged}}
+{{PacketList|{{change|0x4C|0x4D}}|Update Score|pre=unchanged}}
+{{PacketList|{{change|0x4D|0x4E}}|Spawn Position|pre=unchanged}}
+{{PacketList|{{change|0x4E|0x4F}}|Time Update|pre=unchanged}}
+{{PacketList|{{change|0x4F|0x50}}|Title|pre=unchanged}}
+{{PacketList|{{change|0x50|0x51}}|Entity Sound Effect|pre=unchanged}}
+{{PacketList|{{change|0x51|0x52}}|Sound Effect|pre=unchanged}}
+{{PacketList|{{change|0x52|0x53}}|Stop Sound|pre=unchanged}}
+{{PacketList|{{change|0x53|0x54}}|Player List Header And Footer|pre=unchanged}}
+{{PacketList|{{change|0x54|0x55}}|NBT Query Response|pre=unchanged}}
+{{PacketList|{{change|0x55|0x56}}|Collect Item|pre=unchanged}}
+{{PacketList|{{change|0x56|0x57}}|Entity Teleport|pre=unchanged}}
+{{PacketList|{{change|0x57|0x58}}|Advancements|pre=unchanged}}
+{{PacketList|{{change|0x58|0x59}}|Entity Properties|pre=unchanged}}
+{{PacketList|{{change|0x59|0x5A}}|Entity Effect|pre=unchanged}}
+{{PacketList|{{change|0x5A|0x5B}}|Declare Recipes|pre=unchanged}}
+{{PacketList|{{change|0x5B|0x5C}}|Tags|pre=unchanged}}
   |}
@@ Line 301: / Line 117: @@
 == Entity Metadata ==
-{{Warning2|Entity metadata shifted in 19w08a; not all entities are copied here.  All subclasses of entity had shift of 1; all subclasses of living had a second shift (2 total).  All entities listed in the article have been updated, but there are ones not listed here. }}
+{{#vardefine:meta_prerelease|1}}{{warning2|Lots of shifts, of course}}
-=== Entity Metadata Format ===
-Note that entity metadata is a totally distinct concept from block metadata.  It is not required to send all metadata fields, or even any metadata fields, so long as the terminating entry is correctly sent.
-Entity Metadata is an array of entries, each of which looks like the following:
-{| class="wikitable"
- ! Name
- ! Type
- ! Meaning
- |-
- | Index
- | Unsigned Byte
- | Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
- |-
- | Type
- | Optional VarInt Enum
- | Only if Index is not <code>0xff</code>; the type of the index, see the table below
- |-
- | Value
- | Optional ''value of Type''
- | Only if Index is not <code>0xff</code>: the value of the metadata field
- |}
-{| class="wikitable"
- ! Value of Type field
- ! [[Data types|Type]] of Value field
- ! Notes
- |-
- | 0
- | Byte
- |
- |-
- | 1
- | VarInt
- |
- |-
- | 2
- | Float
- |
- |-
- | 3
- | String
- |
- |-
- | 4
- | [[Chat]]
- |
- |-
- | 5
- | OptChat (Boolean + Optional [[Chat]])
- | [[Chat]] is present if the Boolean is set to true
- |-
- | 6
- | [[Slot]]
- |
- |-
- | 7
- | Boolean
- |
- |-
- | 8
- | Rotation
- | 3 floats: rotation on x, rotation on y, rotation on z
- |-
- | 9
- | [[Data Types#Position|Position]]
- |
- |-
- | 10
- | OptPosition (Boolean + Optional Position)
- | Position is present if the Boolean is set to true
- |-
- | 11
- | Direction (VarInt)
- | (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
- |-
- | 12
- | OptUUID (Boolean + Optional UUID)
- | UUID is present if the Boolean is set to true
- |-
- | 13
- | OptBlockID (VarInt)
- | 0 for absent otherwise, <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
- |-
- | 14
- | [[NBT]]
- |
- |-
- | 15
- | [[Data Types#Particle|Particle]]
- |
- |- {{Added}}
- | 16
- | Villager Data
- | 3 VarInts: villager type, villager profession, level
- |- {{Added}}
- | 17
- | OptVarInt
- | 0 for absent; 1 + actual value otherwise.  Used for entity IDs.
- |- {{Added}}
- | 18
- | Pose
- | A VarInt enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: DYING
- |}
-Villager type (<code>minecraft:villager_type</code> registry):
-{| class="wikitable"
- ! Name !! ID
- |-
- | <code>minecraft:desert</code> || 0
- |-
- | <code>minecraft:jungle</code> || 1
- |-
- | <code>minecraft:plains</code> || 2
- |-
- | <code>minecraft:savanna</code> || 3
- |-
- | <code>minecraft:snow</code> || 4
- |-
- | <code>minecraft:swamp</code> || 5
- |-
- | <code>minecraft:taiga</code> || 6
- |}
-Villager professions (<code>minecraft:villager_profession</code> registry):
-{| class="wikitable"
- ! Name !! ID
- |-
- | <code>minecraft:none</code> || 0
- |-
- | <code>minecraft:armorer</code> || 1
- |-
- | <code>minecraft:butcher</code> || 2
- |-
- | <code>minecraft:cartographer</code> || 3
- |-
- | <code>minecraft:cleric</code> || 4
- |-
- | <code>minecraft:farmer</code> || 5
- |-
- | <code>minecraft:fisherman</code> || 6
- |-
- | <code>minecraft:fletcher</code> || 7
- |-
- | <code>minecraft:leatherworker</code> || 8
- |-
- | <code>minecraft:librarian</code> || 9
- |-
- | <code>minecraft:mason</code> || 10
- |-
- | <code>minecraft:nitwit</code> || 11
- |-
- | <code>minecraft:shepherd</code> || 12
- |-
- | <code>minecraft:toolsmith</code> || 13
- |-
- | <code>minecraft:weaponsmith</code> || 14
- |}
-=== Mobs ===
-Entity IDs have shifted with the addition of some new mobs.
-=== Entity ===
-The base class.
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- |rowspan="9"| 0
- |rowspan="9"| Byte
- ! Bit mask
- ! Meaning
- |rowspan="9"| 0
- |-
- | 0x01
- | On Fire
- |-
- | 0x02
- | Crouched
- |-
- | 0x04
- | Unused (previously riding)
- |-
- | 0x08
- | Sprinting
- |-
- | 0x10
- | Swimming
- |-
- | 0x20
- | Invisible
- |-
- | 0x40
- | Glowing effect
- |-
- | 0x80
- | Flying with {{Minecraft Wiki|elytra}}
- |-
- | 1
- | VarInt
- |colspan="2"| Air
- | 300
- |-
- | 2
- | OptChat
- |colspan="2"| Custom name
- | empty
- |-
- | 3
- | Boolean
- |colspan="2"| Is custom name visible
- | false
- |-
- | 4
- | Boolean
- |colspan="2"| Is silent
- | false
- |-
- | 5
- | Boolean
- |colspan="2"| No gravity
- | false
- |- {{Added}}
- | 6
- | Pose
- |colspan="2"| Pose
- | STANDING
- |}
-=== Itemed Throwable ===
-Extends [[#Throwable|Throwable]].
-Used for all things that previously extended throwable other than potions, which already had an item.
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 7
- | Slot
- |colspan="2"| Item
- | empty (which behaves as if it were a specific item, depending on the subclass)
- |}
-=== Egg ===
-Extends [[#Itemed_Throwable|Itemed Throwable]].
-No additional metadata.
-An empty item behaves as if the item were a <code>minecraft:egg</code>.
-=== Ender Pearl ===
-Extends [[#Itemed_Throwable|Itemed Throwable]].
-No additional metadata.
-An empty item behaves as if the item were a <code>minecraft:ender_pearl</code>.
-=== Experience Bottle ===
-Extends [[#Itemed_Throwable|Itemed Throwable]].
-No additional metadata.
-<code>minecraft:experience_bottle</code>
-=== Snowball ===
-Extends [[#Itemed_Throwable|Itemed Throwable]].
-No additional metadata.
-<code>minecraft:snowball</code>
-=== Eye of Ender ===
-Extends [[#Entity|Entity]].
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 7
- | Slot
- |colspan="2"| Item
- | empty (which behaves as if it were a <code>minecraft:ender_eye</code>)
- |}
-=== Arrow ===
-Extends [[#Entity|Entity]].
-Abstract base class for [[#TippedArrow|TippedArrow]] (which is used for regular arrows as well as tipped ones) and Spectral Arrow.
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | rowspan="3" | {{change|6|7}}
- | rowspan="3" | Byte
- ! Bit mask
- ! Meaning
- | rowspan="3" | 0
- |-
- | 0x01
- | Is critical
- |-
- | 0x02
- | Is noclip (used by loyalty tridents when returning)
- |-
- | {{change|7|8}}
- | OptUUID
- |colspan="2"| Shooter UUID
- | Empty
- |- {{added}}
- | 9
- | Byte
- |colspan="2"| Piercing level
- | 0
- |}
-=== TippedArrow ===
-Extends [[#Arrow|Arrow]].
-Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | {{change|8|10}}
- | VarInt
- |colspan="2"| Color (-1 for no particles)
- | -1
- |}
-=== Trident ===
-Extends [[#Arrow|Arrow]].
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | {{change|8|10}}
- | VarInt
- |colspan="2"| Loyalty level (enchantment)
- | 0
- |}
-=== Itemed Fireball ===
-Extends [[#Entity|Entity]].
-Used for regular and small fireballs.  Not used for dragon fireballs and wither skulls.  Interestingly, regular fireballs do not come from an item.
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 7
- | Slot
- |colspan="2"| Item
- | empty (which behaves as if it were a <code>minecraft:fire_charge</code>)
- |}
-=== Fireball ===
-Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the large fireball shot by ghasts.
-No additional metadata.
-=== Small Fireball ===
-Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the fireball shot by blazes and dispensers with fire charges.
-No additional metadata.
-=== Fireworks ===
-Extends [[#Entity|Entity]].
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | {{change|6|7}}
- | [[Slot]]
- |colspan="2"| Firework info
- | empty
- |-
- | {{change|7|8}}
- | {{Change|VarInt|OptVarInt}}
- |colspan="2"| Entity ID of entity which used firework (for elytra boosting)
- | 0
- |- {{Added}}
- | 9
- | Boolean
- |colspan="2"| Shot at angle (from a crossbow)
- | false
- |}
 === Living ===
-Extends [[#Entity|Entity]].
+{{Metadata inherit|Living|inherits=Entity|start_at=7}}
 {| class="wikitable"
@@ Line 741: / Line 129: @@
   ! Default
   |-
-  |rowspan="5"| {{change|6|7}}
+  |rowspan="5"| {{Metadata id|}}
   |rowspan="5"| Byte
   |colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
@@ Line 758: / Line 146: @@
   | In riptide spin attack
   |-
-  | {{change|7|8}}
+  | {{Metadata id|}}
   | Float
   |colspan="2"| Health
   | 1.0
   |-
-  | {{change|8|9}}
+  | {{Metadata id|}}
   | VarInt
   |colspan="2"| Potion effect color (or 0 if there is no effect)
   | 0
   |-
-  | {{change|9|10}}
+  | {{Metadata id|}}
   | Boolean
   |colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
   | false
   |-
-  | {{change|10|11}}
+  | {{Metadata id|}}
   | VarInt
   |colspan="2"| Number of arrows in entity
   | 0
   |- {{Added}}
-  | 12
+  | {{Metadata id|added}}
+ | VarInt
+ |colspan="2"| Health added by absorption (based on the AbsorptionAmount tag)
+ | 0
+ |-
+ | {{Metadata id|}}
   | OptBlockPos
-  |colspan="2"| Unknown (Bed location?)
+  |colspan="2"| Sleeping location (from SleepingX, SleepingY, SleepingZ tags)
   | Absent
   |}
-=== Panda ===
+=== Bee ===
-Extends [[#Animal|Animal]].
+{{Metadata inherit|Bee|inherits=Insentient|start_at=16}}
 {| class="wikitable" {{added}}
@@ Line 794: / Line 187: @@
   ! Default
   |-
-  | 15
+  |rowspan="5"| {{Metadata id|}}
- | Integer
+  |rowspan="5"| Byte
- |colspan="2"| Breed timer?  Set to 32 when something happens, and then counts down to 0 again.  At 29 and 14 (before counting down), will play the <code>entity.panda.cant_breed</code> sound event.
+  |colspan="2"| Flags
- | 0
+  |rowspan="5"| 0
- |-
-  | 16
- | Integer
-  |colspan="2"| Sneeze timer.  Counts up from 0; when it hits 1 the <code>entity.panda.pre_sneeze</code> event plays and when it hits 21 the <code>entity.panda.sneeze</code> event plays (and it is set back to 0 and the sneeze flag is cleared).
- | 0
- |-
-  | 17
- | Integer
- |colspan="2"| Eat timer.  If nonzero, counts upwards.
- | 0
   |-
-  | 18
+  | 0x01 || ''Unused''
- | Byte
- |colspan="2"| Main Gene
- | 0
   |-
-  | 19
+  | 0x02 || Is angry
- | Byte
- |colspan="2"| Hidden Gene
- | 0
   |-
-  |rowspan="6"| 20
+  | 0x04 || Has stung
- |rowspan="6"| Byte
- ! Bit mask
- ! Meaning
- |rowspan="6"| 0
   |-
-  | 0x01
+  | 0x08 || Has nectar
- | Unused
   |-
-  | 0x02
+  | {{Metadata id|}}
- | Is sneezing
- |-
- | 0x04
- | Is eating
- |-
- | 0x08
- | Unknown
- |-
- | 0x10
- | Unknown
- |}
-=== Fox ===
-Extends [[#Animal|Animal]].
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 15
   | VarInt
-  | colspan="2" | Type (0: red, 1: snow)
+  | colspan="2"| Anger time in ticks
-  | 0 (red)
+  | 0 (Not angry)
- |-
- | rowspan="9" | 16
- | rowspan="9" | Byte
- ! Bit mask
- ! Meaning
- | rowspan="9" | 0
- |-
- | 0x01 || Sitting
- |-
- | 0x02 || ''Unused''
- |-
- | 0x04 || Crouching
- |-
- | 0x08 || Unknown
- |-
- | 0x10 || Unknown
- |-
- | 0x20 || Sleeping
- |-
- | 0x40 || Unknown
- |-
- | 0x80 || Unknown
- |-
- | 17
- | OptUUID
- | colspan="2" | First UUID (in <code>UUIDs</code> NBT)?
- | Absent
- |-
- | 18
- | OptUUID
- | colspan="2" | Second UUID (in <code>UUIDs</code> NBT)?
- | Absent
- |}
-=== Mooshroom ===
-Extends [[#Cow|Cow]].
-{{change|No additional metadata.}}
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 15
- | String
- | colspan="2"| Variant ("red" or "brown")
- | red
   |}
-=== Raid Participent ===
+=== Wolf ===
-{{change||Extends [[#Monster|Monster]].}}
+{{Metadata inherit|Wolf|inherits=TameableAnimal|start_at=17|pre_start_at=18}}
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 14
- | boolean
- | colspan="2"| Is celebrating
- | false
- |}
-"Is celebrating" appears to control the pose for vindicators and does not appear to be used by other types.
-=== Abstract Illager ===
-Extends {{change|[[#Monster|Monster]]|[[#Raid Participent|Raid Participent]]}}.
-{| class="wikitable" {{removed}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- |rowspan="2"| 12
- |rowspan="2"| Byte
- ! Bit mask
- ! Meaning
- |rowspan="2"| 0
- |-
- | 0x01
- | Has target (aggressive state)
- |}
-{{Change||Replaced with pose (presumably?)}}
-=== Spellcaster Illager ===
-Extends [[#Abstract Illager|Abstract Illlager]].
 {| class="wikitable"
@@ Line 956: / Line 215: @@
   !style="width: 250px;" colspan="2"| Meaning
   ! Default
+ |- {{removed}}
+ | {{Metadata id|removed}}
+ | Float
+ |colspan="2"| Damage taken (used for tail rotation)
+ | Value of health field (1.0)
   |-
-  | {{change|13|15}}
+  | {{Metadata id|}}
- | Byte
- | colspan="2"| Spell (0: none, 1: summon vex, 2: attack, 3: wololo, 4: disappear, 5: blindness)
- | 0
- |}
-=== {{change|EvocationIllager|Evoker}} ===
-Extends [[#Spellcaster Illager|Spellcaster Illager]].
-=== {{change|IllusionIllager|Illusioner}} ===
-Extends [[#Spellcaster Illager|Spellcaster Illager]].
-=== Pillager ===
-Extends [[#Abstract Illager|Abstract Illlager]].
-{| class="wikitable" {{added}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | 15
   | Boolean
-  | colspan="2"| Using crossbow
+  |colspan="2"| Is begging
   | false
- |}
-=== {{change|VindicationIllager|Vindicator}} ===
-Extends [[#Abstract Illager|Abstract Illager]].
-=== Ravager ===
-Extends [[#Raid Participent|Raid Participent]]
-No additional metadata.
-{| class="wikitable" {{added}}
- ! Status
- !colspan="2"| Description
   |-
-  | 4
+  | {{Metadata id|}}
-  |colspan="2"| Starts the attack animation.
+ | VarInt
- |-
+  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
- | 39
+  | 14 (Red)
-  |colspan="2"| Starts the stun animation.
   |}
-=== Witch ===
+=== Enderman ===
-Extends {{change|[[#Monster|Monster]]|[[#Raid Participent|Raid Participent]]}}.
+{{Metadata inherit|Wolf|inherits=Monster|start_at=14|pre_start_at=15}}
 {| class="wikitable"
@@ Line 1,018: / Line 242: @@
   ! Default
   |-
-  | {{change|12|15}}
+  | {{Metadata id|}}
+ | Opt BlockID
+ |colspan="2"| Carried block
+ | Absent
+ |-
+ | {{Metadata id|}}
   | Boolean
-  |colspan="2"| Is drinking potion
+  |colspan="2"| Is screaming
   | false
-  |}
+  |- {{added}}
+  | {{Metadata id|added}}
-=== AbstractSkeleton ===
-Extends [[#Monster|Monster]].
-{| class="wikitable" {{removed}}
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
-  | {{change|12|14}}
   | Boolean
-  |colspan="2"| Is swinging arms
+  |colspan="2"| Is stared at
   | false
   |}
-{{Change||Replaced with pose (presumably?)}}
+=== Trident ===
-=== Zombie ===
-Extends [[#Monster|Monster]].
+{{Metadata inherit|Wolf|inherits=TameableAnimal|start_at=10}}
 {| class="wikitable"
@@ Line 1,052: / Line 268: @@
   ! Default
   |-
-  | {{change|12|14}}
+  | {{Metadata id|}}
- | Boolean
- |colspan="2"| Is baby
- | false
- |-
- | {{change|13|15}}
   | VarInt
-  |colspan="2"| Unused (previously type)
+  |colspan="2"| Loyalty level (enchantment)
   | 0
-  |- {{removed}}
+  |- {{Added}}
-  | 14
+  | {{Metadata id|}}
   | Boolean
-  |colspan="2"| Are hands held up
+  |colspan="2"| Has enchantment glint
-  | false
+  | False
- |-
- | {{change|15|16}}
- | Boolean
- |colspan="2"| Is becoming a drowned
- | false
   |}
-{{Change||Replaced with pose (presumably?)}}
+== Block Actions ==
+No changes so far.
+== Inventories ==
-=== Zombie Villager ===
+No changes so far.
-Extends [[#Zombie|Zombie]].
+== Plugin Channels ==
-{| class="wikitable"
+No changes so far.
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
- |-
- | {{change|16|17}}
- | Boolean
- |colspan="2"| Is converting
- | false
- |-
- | {{change|17|18}}
- | {{Change|VarInt|Villager Data}}
- |colspan="2"| {{Change|Profession|Villager Data}}
- | {{change|0|Plains/None/1}}
- |}
+== Play ==
-=== Ocelot ===
+=== Clientbound ===
+==== Spawn Mob ====
-Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
+Sent by the server when a mob entity is spawned.
 {| class="wikitable"
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+ ! Field Name
-  |- {{removed}}
+ ! Field Type
-  | 15
+  ! Notes
+ |-
+ |rowspan="13"| 0x03
+ |rowspan="13"| Play
+  |rowspan="13"| Client
+ | Entity ID
+ | VarInt
+ |
+ |-
+ | Entity UUID
+ | UUID
+ |
+  |-
+  | Type
   | VarInt
-  |colspan="2"| Type (0 = untamed, 1 = tuxedo, 2 = tabby, 3 = siamese).  Used to render regardless as to whether it is tamed or not.
+  | The type of mob. See [[Entities#Mobs]]
-  | 0
+  |-
-  |- {{added}}
+  | X
-  | 15
+  | Double
-  | Boolean
+  |
-  |colspan="2"| Is trusting
+  |-
-  | false
+  | Y
-  |}
+  | Double
+  |
-{| class="wikitable" {{added}}
- ! Status
-  !colspan="2"| Description
   |-
-  | 40
+  | Z
-  |colspan="2"| Spawn smoke particles (trust gaining failed)
+  | Double
+ |
   |-
-  | 41
+  | Yaw
-  |colspan="2"| Spawn heart particles (trust gaining succeeded)
+  | Angle
- |}
+  |
-=== Cat ===
-Extends [[#TameableAnimal|TameableAnimal]].
-{| class="wikitable" {{added}}
-  ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
   |-
-  | 17
+  | Pitch
-  | VarInt
+  | Angle
-  |colspan="2"| Type (0 = tabby, 1 = black, 2 = red, 3 = siamese, 4 = british_shorthair, 5 = calico, 6 = persian, 7 = ragdoll, 8 = white, 9 = all_black)
+  |
- | 1
   |-
-  | 18
+  | Head Pitch
-  | Boolean
+  | Angle
-  |colspan="2"| Unknown
+  |
- | false
   |-
-  | 19
+  | Velocity X
-  | Boolean
+  | Short
-  |colspan="2"| Unknown
+  | Same units as [[#Entity Velocity|Entity Velocity]]
- | false
   |-
-  | 20
+  | Velocity Y
-  | VarInt
+  | Short
-  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+  | Same units as [[#Entity Velocity|Entity Velocity]]
- | 14 (Red)
- |}
-=== Horse ===
-Extends [[#AbstractHorse|AbstractHorse]].
-{| class="wikitable"
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- ! Default
   |-
-  | {{change|15|17}}
+  | Velocity Z
-  | VarInt
+  | Short
-  |colspan="2"| Variant (Color & Style)
+  | Same units as [[#Entity Velocity|Entity Velocity]]
- | 0
   |- {{removed}}
-  | 16
+  | Metadata
- | VarInt
+  | [[Entities#Entity Metadata Format|Entity Metadata]]
- |colspan="2"| Armor (0: none, 1: iron, 2: gold, 3: diamond)
+  |
- | 0 (none)
- |- {{removed}}
- | 17
-  | [[Slot]]
-  |colspan="2"| Armor Item (Forge only)
- | Empty
   |}
-{{change||Replaced with [[#Entity Equipment|Entity Equipment]] packet. (Uses chestplate slot)}}
+==== Spawn Player ====
-=== Trader Llama ===
+This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
-Extends [[#Llama|Llama]].
+This packet must be sent after the [[#Player Info|Player Info]] packet that adds the player data for the client to use when spawning a player. If the Player Info for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player Info packet includes skin/cape data.
-No additional metadata.
+Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
-=== Abstract Merchant ===
+{| class="wikitable"
+  ! Packet ID
-Extends [[#Ageable|Ageable]].
+ ! State
+ ! Bound To
-{| class="wikitable" {{added}}
+  ! Field Name
-  ! Index
+  ! Field Type
-  ! Type
+  ! Notes
-  !style="width: 250px;" colspan="2"| Meaning
-  ! Default
   |-
-  | 15
+  |rowspan="8"| 0x05
+ |rowspan="8"| Play
+ |rowspan="8"| Client
+ | Entity ID
   | VarInt
-  |colspan="2"| Head shake timer (starts at 40, decrements each tick)
+  | Player's EID
-  | 0
+ |-
-  |}
+ | Player UUID
+  | UUID
-=== Villager ===
+  | See below for notes on {{Minecraft Wiki|Server.properties#online-mode|offline mode}} and NPCs
+ |-
-Extends {{change|[[#Ageable|Ageable]]|[[#Abstract Merchant|Abstract Merchant]]}}.
+ | X
+ | Double
-{| class="wikitable"
+ |
-  ! Index
+ |-
-  ! Type
+ | Y
-  !style="width: 250px;" colspan="2"| Meaning
+ | Double
-  ! Default
+ |
+ |-
+ | Z
+ | Double
+ |
+  |-
+  | Yaw
+  | Angle
+  |
   |-
-  | {{change|13|16}}
+  | Pitch
-  | {{change|VarInt|Villager Data}}
+ | Angle
-  |colspan="2"| {{Change|Profession (Farmer = 0, Librarian = 1, Priest = 2, Blacksmith = 3, Butcher = 4, Nitwit = 5)|Villager Data}}
+ |
-  | {{change|0|Plains/None/1}}
+  |- {{removed}}
+  | Metadata
+ | [[Entities#Entity Metadata Format|Entity Metadata]]
+  |
   |}
-=== Wandering Trader ===
+When in {{Minecraft Wiki|Server.properties#online-mode|online mode}}, the UUIDs must be valid and have valid skin blobs.
-Extends [[#Abstract Merchant|Abstract Merchant]].
+In offline mode, [[Wikipedia:Universally unique identifier#Versions 3 and 5 (namespace name-based)|UUID v3]] is used with the String <code>OfflinePlayer:&lt;player name&gt;</code>, encoded in UTF-8 (and case-sensitive).
-No additional metadata.
+For NPCs UUID v2 should be used. Note:
-== Block Actions ==
+ <+Grum> i will never confirm this as a feature you know that :)
-No changes so far.
+In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
-== Inventories ==
+==== Update Block Entity ====
-Merged
+Sets the block entity associated with the block at the given location.
-== Plugin Channels ==
+{| class="wikitable"
-Merged
-== Play ==
-=== Clientbound ===
-Merged
-=== Serverbound ===
-==== Set Difficulty ====
-Must have at least op level 2 to use.  Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
-{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 1,264: / Line 436: @@
   ! Notes
   |-
-  |rowspan="1"| 0x02
+  |rowspan="3"| {{change|0x09|0x0A}}
-  |rowspan="1"| Play
+  |rowspan="3"| Play
-  |rowspan="1"| Server
+  |rowspan="3"| Client
-  | New difficulty
+ | Location
-  | Byte
+ | Position
-  | 0: peaceful, 1: easy, 2: normal, 3: hard
+  |
+  |-
+ | Action
+ | Unsigned Byte
+  | The type of update to perform, see below
+ |-
+ | NBT Data
+ | [[NBT|NBT Tag]]
+ | Data to set.  May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)
   |}
-==== Click Window Button ====
+''Action'' field:
-{{Change|Was named Enchant Item}}
+* '''1''': Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
+* '''2''': Set command block text (command and last execution status)
+* '''3''': Set the level, primary, and secondary powers of a beacon
+* '''4''': Set rotation and skin of mob head
+* '''5''': Declare a conduit
+* '''6''': Set base color and patterns on a banner
+* '''7''': Set the data for a Structure tile entity
+* '''8''': Set the destination for a end gateway
+* '''9''': Set the text on a sign
+* '''10''': Unused
+* '''11''': Declare a bed
+* '''12''': Set data of a jigsaw block
+* '''13''': Set items in a campfire
+* {{change||'''14''': Beehive information}}
-{{Change||Used more generally than just for enchanting in 1.14, although the code internally supported general use in earlier versions.}}
+==== Change Game State ====
+Used for a wide variety of game state things, from whether to bed use to gamemode to demo messages.
 {| class="wikitable"
@@ Line 1,286: / Line 481: @@
   ! Notes
   |-
-  |rowspan="2"| 0x07
+  |rowspan="2"| 0x1F
   |rowspan="2"| Play
-  |rowspan="2"| Server
+  |rowspan="2"| Client
-  | Window ID
+  | Reason
-  | Byte
+  | Unsigned Byte
-  | The ID of the {{change|enchantment table}} window sent by [[#Open Window|Open Window]]
+  | See below
   |-
-  | {{Change|Enchantment|Button ID}}
+  | Value
-  | Byte
+  | Float
-  | {{change|The position of the enchantment on the enchantment table window, starting with 0 as the topmost one|Meaning depends on window type; see below}}
+  | Depends on Reason
   |}
+''Reason codes'':
 {| class="wikitable"
-  ! Window type
+  ! Reason
-  ! ID
+  ! Effect
-  ! Meaning
+  ! Value
   |-
-  |rowspan="3"| Enchantment Table
+  | 0
-  | 0 || Topmost enchantment
+ | Invalid Bed
+  | Would be used to switch between messages, but the only used message is 0 for invalid bed
   |-
-  | 1 || Middle enchantment
+  | 1
+ | End raining
+ |
   |-
-  | 2 || Bottom enchantment
+  | 2
+ | Begin raining
+ |
   |-
-  |rowspan="4"| Lectern
+  | 3
-  | 1 || Unknown - maybe previous page?  (which does give a redstone output)
+ | Change gamemode
+  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator
   |-
-  | 2 || Unknown - maybe next page?
+  | 4
+ | Exit end
+ | 0: Immediately send Client Status of respawn without showing end credits; 1: Show end credits and respawn at the end (or when esc is pressed).  1 is sent if the player has not yet received the "The end?" advancement, while if they do have it 0 is used.
   |-
-  | 3 || Take Book
+  | 5
+ | Demo message
+ | 0: Show welcome to demo screen, 101: Tell movement controls, 102: Tell jump control, 103: Tell inventory control
+ |-
+ | 6
+ | Arrow hitting player
+ | Appears to be played when an arrow strikes another player in Multiplayer
+ |-
+ | 7
+ | Fade value
+ | The current darkness value. 1 = Dark, 0 = Bright, Setting the value higher causes the game to change color and freeze
   |-
-  | 100? || Unknown - actual value is 100 + some parameter, so there may be multiple
+  | 8
+ | Fade time
+ | Time in ticks for the sky to fade
   |-
-  | Stonecutter
+  | 9
-  |colspan="2"| Recipe button number - 4*row + col.  Depends on the item.
+  | Play pufferfish sting sound
   |-
-  | Loom
+  | 10
-  |colspan="2"| Recipe button number - 4*row + col.  Depends on the item.
+  | Play elder guardian mob appearance (effect and sound)
+ |- {{Added}}
+ | 11
+  | Enable respawn screen
+ | 0: Enable respawn screen, 1: Immediately respawn (sent when the doImmediateRespawn gamerule changes)
   |}
-==== Lock Difficulty ====
+==== Chunk Data ====
+{{Main|Chunk Format}}
+{{See also|#Unload Chunk}}
-Must have at least op level 2 to use.  Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
+{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...  ([https://www.reddit.com/r/Mojira/comments/e5at6i/a_discussion_for_the_changes_to_how_biomes_are/ /r/mojira discussion] which notes that it seems to be some kind of interpolation, and 3D biomes are only used in the nether)}}
-{| class="wikitable" {{added}}
+The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
+{| class="wikitable"
   ! Packet ID
   ! State
@@ Line 1,338: / Line 563: @@
   ! Notes
   |-
-  |rowspan="1"| 0x0F
+  |rowspan="10"| {{change|0x21|0x22}}
-  |rowspan="1"| Play
+  |rowspan="10"| Play
-  |rowspan="1"| Server
+  |rowspan="10"| Client
-  | Locked
+ | Chunk X
+ | Int
+ | Chunk coordinate (block coordinate divided by 16, rounded down)
+ |-
+ | Chunk Z
+ | Int
+ | Chunk coordinate (block coordinate divided by 16, rounded down)
+ |-
+  | Full chunk
   | Boolean
-  |
+  | See [[Chunk Format#Full chunk|Chunk Format]]
+ |-
+ | Primary Bit Mask
+ | VarInt
+ | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
+ |-
+ | Heightmaps
+ | [[NBT]]
+ | Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
+ |- {{Added}}
+ | Biomes
+ | Optional array of Integer
+ | 1024 biome IDs, ordered by x then z then d, in 4&times;4&times;4 blocks.  Not present if full chunk is false.
+ |-
+ | Size
+ | VarInt
+ | Size of Data in bytes
+ |-
+ | Data
+ | Byte array
+ | See [[Chunk Format#Data structure|data structure]] in Chunk Format
+ |-
+ | Number of block entities
+ | VarInt
+ | Number of elements in the following array
+ |-
+ | Block entities
+ | Array of [[NBT|NBT Tag]]
+ | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
   |}
-==== Recipe Book Data ====
+Note that the Notchian client requires an [[#Update View Position|Update View Position]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
+{{Change||To get the biome at a coordinate, use <code>biomes[((y >> 2) & 63) << 4 {{!}} ((z >> 2) & 3) << 2 {{!}} ((x >> 2) & 3)]</code>}}
+===== Data structure =====
+The data section of the packet contains most of the useful data for the chunk.
+{| class="wikitable"
+ |-
+ ! Field Name
+ ! Field Type
+ ! Notes
+ |-
+ | Data
+ | Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
+ | The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
+ |- {{removed}}
+ | Biomes
+ | Optional Int Array
+ | Only sent if full chunk is true; 256 entries if present
+ |}
+==== Particle ====
+Displays the named particle.
 {| class="wikitable"
@@ Line 1,352: / Line 638: @@
   ! State
   ! Bound To
-  !colspan="2"| Field Name
+  ! Field Name
   ! Field Type
   ! Notes
   |-
-  |rowspan="11"| {{change|0x1B|0x1D}}
+  |rowspan="11"| {{Change|0x23|0x24}}
   |rowspan="11"| Play
-  |rowspan="11"| Server
+  |rowspan="11"| Client
-  |colspan="2"| Type
+  | Particle ID
-  | VarInt
+ | Int
-  | Determines the format of the rest of the packet
+ | The particle ID listed in [[#Particle|the particle data type]].
+ |-
+ | Long Distance
+ | Boolean
+ | If true, particle distance increases from 256 to 65536
+ |-
+  | X
+  | {{Change|Float|Double}}
+ | X position of the particle
+ |-
+ | Y
+ | {{Change|Float|Double}}
+ | Y position of the particle
+ |-
+ | Z
+ | {{Change|Float|Double}}
+ | Z position of the particle
   |-
-  ! Type
+  | Offset X
-  ! Field Name
+  | Float
-  !
+  | This is added to the X position after being multiplied by random.nextGaussian()
- !
   |-
-  | 0: Displayed Recipe
+  | Offset Y
-  | Recipe ID
+  | Float
-  | Identifier
+  | This is added to the Y position after being multiplied by random.nextGaussian()
- | A recipe ID
   |-
-  |rowspan="8"| 1: Recipe Book States
+  | Offset Z
-  | Crafting Recipe Book Open
+  | Float
-  | Boolean
+  | This is added to the Z position after being multiplied by random.nextGaussian()
- | Whether the player has the crafting recipe book currently opened/active.
   |-
-  | Crafting Recipe Filter Active
+  | Particle Data
-  | Boolean
+  | Float
-  | Whether the player has the crafting recipe book filter option currently active.
+  | The data of each particle
   |-
-  | Smelting Recipe Book Open
+  | Particle Count
-  | Boolean
+  | Int
-  | Whether the player has the smelting recipe book currently opened/active.
+  | The number of particles to create
   |-
-  | Smelting Recipe Filter Active
+  | Data
-  | Boolean
+  | Varies
-  | Whether the player has the smelting recipe book filter option currently active.
+  | The variable data listed in [[#Particle|the particle data type]].
- |- {{Added}}
- | Blasting Recipe Book Open
- | Boolean
- | May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
- |- {{Added}}
- | Blasting Recipe Filter Active
- | Boolean
- | May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
- |- {{Added}}
- | Smoking Recipe Book Open
- | Boolean
- |
- |- {{Added}}
- | Smoking Recipe Filter Active
- | Boolean
- |
   |}
-The Recipe Book Status type is sent when one of the states changes.
+==== Join Game ====
-==== Update Jigsaw Block ====
+See [[Protocol Encryption]] for information on logging in.
-Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
+{| class="wikitable"
-{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 1,421: / Line 702: @@
   ! Notes
   |-
-  |rowspan="4"| 0x27
+  |rowspan="9"| {{change|0x25|0x26}}
-  |rowspan="4"| Play
+  |rowspan="9"| Play
-  |rowspan="4"| Server
+  |rowspan="9"| Client
-  | Location
+ | Entity ID
-  | Position
+ | Int
-  | Block entity location
+ | The player's Entity ID (EID)
+ |-
+ | Gamemode
+ | Unsigned Byte
+ | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
+ |-
+ | Dimension
+ | Int Enum
+ | -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
+ |- {{Added}}
+ | Hashed seed
+ | Long
+ | First 8 bytes of the SHA-256 hash of the world's seed.
+ |-
+ | Max Players
+ | Unsigned Byte
+ | Was once used by the client to draw the player list, but now is ignored
+ |-
+  | Level Type
+  | String Enum (16)
+  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
   |-
-  | Attachment type
+  | View Distance
- | Identifier
+  | VarInt
-  |
+  | Render distance (2-32)
-  |-
- | Target pool
- | Identifier
- |
   |-
-  | Final state
+  | Reduced Debug Info
-  | String
+  | Boolean
-  | "Turns into" on the GUI, <code>final_state</code> in NBT
+  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
+ |- {{Added}}
+ | Enable respawn screen
+ | Boolean
+ | Set to false when the doImmediateRespawn gamerule is true
   |}
-==== Player Block Placement ====
+==== Respawn ====
+To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
 {| class="wikitable"
- |-
   ! Packet ID
   ! State
@@ Line 1,452: / Line 754: @@
   ! Notes
   |-
-  |rowspan="9"| {{change|0x29|0x2C}}
+  |rowspan="4"| {{change|0x3A|0x3B}}
-  |rowspan="9"| Play
+  |rowspan="4"| Play
-  |rowspan="9"| Server
+  |rowspan="4"| Client
-  |{{removed}}| Location
+  | Dimension
-  |{{removed}}| Position
+  | Int Enum
-  |{{removed}}| Block position
+  | -1: The Nether, 0: The Overworld, 1: The End
-  |- {{removed}}
+  |- {{Added}}
-  | Face
+  | Hashed seed
-  | VarInt Enum
+  | Long
-  | The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
+  | First 8 bytes of the SHA-256 hash of the world's seed.
   |-
-  | Hand
+  | Gamemode
-  | VarInt Enum
+  | Unsigned Byte
-  | The hand from which the block is placed; 0: main hand, 1: off hand
+  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
- |- {{added}}
- | Location
- | Position
- | Block position
- |- {{added}}
- | Face
- | VarInt Enum
- | The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
- |-
- | Cursor Position X
- | Float
- | The position of the crosshair on the block, from 0 to 1 increasing from west to east
- |-
- | Cursor Position Y
- | Float
- | The position of the crosshair on the block, from 0 to 1 increasing from bottom to top
   |-
-  | Cursor Position Z
+  | Level Type
-  | Float
+  | String (16)
-  | The position of the crosshair on the block, from 0 to 1 increasing from north to south
+  | Same as [[#Join Game|Join Game]]
- |- {{added}}
- | Inside block
- | Boolean
- | True when the player's head is inside of a block.
   |}
-Upon placing a block, this packet is sent once.
+{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
-The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to sixteen pixel in the default resource pack. For example, let's say a slab is being placed against the south face of a full block. The Cursor Position X will be higher if the player was pointing near the right (east) edge of the face, lower if pointing near the left. The Cursor Position Y will be used to determine whether it will appear as a bottom slab (values 0.0–0.5) or as a top slab (values 0.5-1.0). The Cursor Position Z should be 1.0 since the player was looking at the southernmost part of the block.
+If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
-{{Change||Inside block is true when a player's head (specifically eyes) are inside of a block's collision.  In 1.13 and later versions, collision is rather complicated and individual blocks can have multiple collision boxes.  For instance, a ring of vines has a non-colliding hole in the middle.  This value is only true when the player is directly in the box.  In practice, though, this value is only used by scaffolding to place in front of the player when sneaking inside of it (other blocks will place behind when you intersect with them -- try with glass for instance).}}
+=== Serverbound ===
+No changes so far.
 == Handshaking ==
@@ Line 1,506: / Line 790: @@
 === Serverbound ===
-<!-- ==== Handshake ====
+==== Handshake ====
 This causes the server to switch into the target state.
@@ Line 1,523: / Line 807: @@
   | Protocol Version
   | VarInt
-  | See [[protocol version numbers]] (currently {{change|498|550}})
+  | See [[protocol version numbers]] (currently {{change|498|577}})
   |-
   | Server Address
@@ Line 1,536: / Line 820: @@
   | VarInt Enum
   | 1 for [[#Status|status]], 2 for [[#Login|login]]
-  |}-->
+  |}
 == Status ==

Difference between revisions of "Pre-release protocol"

Revision as of 17:09, 16 January 2020

Contents

Contents

Data types

Packets

New/modified data types

Entity Metadata

Living

Bee

Wolf

Enderman

Trident

Block Actions

Inventories

Plugin Channels

Play

Clientbound

Spawn Mob

Spawn Player

Update Block Entity

Change Game State

Chunk Data

Data structure

Particle

Join Game

Respawn

Serverbound

Handshaking

Clientbound

Serverbound

Handshake

Status

Clientbound

Serverbound

Login

Clientbound

Serverbound

Navigation menu

Search