Difference between revisions of "Pre-release protocol"

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(→‎Entity Metadata: Add shifts from 19w08a)
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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-pre2, protocol 473]]). 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|1.18.2, protocol 758]]) to the current pre-release (currently [[Protocol version numbers|22w16b, protocol {{Snapshot PVN|1073741905}}]]). 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.
 
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 ===
 
=== Data types ===
  
==== Position ====
+
No changes so far.
 
 
64-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 << 38 >> 38) >> 12}};
 
 
 
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 }
 
  
 
=== Packets ===
 
=== Packets ===
  
{| class="wikitable"
+
No changes so far.
! ID
 
! Packet name
 
!colspan="2"| Documentation
 
|-
 
!colspan="4"| Handshaking serverbound
 
{{PacketList|0x00|Handshake}}
 
|-
 
!colspan="4"| Play clientbound
 
{{PacketList|0x00|Spawn Object}}
 
{{PacketList|0x01|Spawn Experience Orb|pre=unchanged}}
 
{{PacketList|0x02|Spawn Global Entity|pre=unchanged}}
 
{{PacketList|0x03|Spawn Mob|pre=unchanged}}
 
{{PacketList|0x04|Spawn Painting|pre=unchanged}}
 
{{PacketList|0x05|Spawn Player|pre=unchanged}}
 
{{PacketList|0x06|Animation (clientbound)|pre=unchanged}}
 
{{PacketList|0x07|Statistics|pre=unchanged}}
 
{{PacketList|0x08|Block Break Animation|pre=unchanged}}
 
{{PacketList|0x09|Update Block Entity}}
 
{{PacketList|0x0A|Block Action|pre=unchanged}}
 
{{PacketList|0x0B|Block Change|pre=unchanged}}
 
{{PacketList|0x0C|Boss Bar|pre=unchanged}}
 
{{PacketList|0x0D|Server Difficulty}}
 
{{PacketList|0x0E|Chat Message (clientbound)|pre=unchanged}}
 
{{PacketList|0x0F|Multi Block Change|pre=unchanged}}
 
{{PacketList|0x10|Tab-Complete (clientbound)|pre=unchanged}}
 
{{PacketList|0x11|Declare Commands|pre=unchanged}}
 
{{PacketList|0x12|Confirm Transaction (clientbound)|pre=unchanged}}
 
{{PacketList|0x13|Close Window (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x14}}|Window Items|pre=unchanged}}
 
{{PacketList|{{change|0x16|0x15}}|Window Property|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x16}}|Set Slot|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x17}}|Set Cooldown|pre=unchanged}}
 
{{PacketList|{{change|0x19|0x18}}|Plugin Message (clientbound)}}
 
{{PacketList|{{change|0x1A|0x19}}|Named Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1A}}|Disconnect (play)|pre=unchanged}}
 
{{PacketList|{{change|0x1C|0x1B}}|Entity Status|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x1C}}|Explosion|pre=unchanged}}
 
{{PacketList|{{change|0x1F|0x1D}}|Unload Chunk|pre=unchanged}}
 
{{PacketList|{{change|0x20|0x1E}}|Change Game State|pre=unchanged}}
 
{{PacketList|0x1F|Open Horse Window}}
 
{{PacketList|{{change|0x21|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x22|0x21}}|Chunk Data}}
 
{{PacketList|{{change|0x23|0x22}}|Effect|pre=unchanged}}
 
{{PacketList|{{change|0x24|0x23}}|Particle|pre=unchanged}}
 
{{PacketList|0x24|Update Light}}
 
{{PacketList|0x25|Join Game}}
 
{{PacketList|0x26|Map Data}}
 
{{PacketList|0x27|Trade List}}
 
{{PacketList|0x28|Entity Relative Move|pre=unchanged}}
 
{{PacketList|0x29|Entity Look And Relative Move|pre=unchanged}}
 
{{PacketList|0x2A|Entity Look|pre=unchanged}}
 
{{PacketList|{{change|0x27|0x2B}}|Entity|pre=unchanged}}
 
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x2C|0x2D}}|Open Sign Editor|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x2E}}|Open Window}}
 
{{PacketList|0x2F|Open Book}}
 
{{PacketList|{{change|0x2D|0x30}}|Craft Recipe Response|pre=unchanged}}
 
{{PacketList|{{change|0x2E|0x31}}|Player Abilities (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x2F|0x32}}|Combat Event|pre=unchanged}}
 
{{PacketList|{{change|0x33}}|Use Bed|pre=removed}}
 
{{PacketList|{{change|0x30|0x33}}|Player Info|pre=unchanged}}
 
{{PacketList|{{change|0x31|0x34}}|Face Player|pre=unchanged}}
 
{{PacketList|{{change|0x32|0x35}}|Player Position And Look (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x34|0x36}}|Unlock Recipes|pre=unchanged}}
 
{{PacketList|{{change|0x35|0x37}}|Destroy Entities|pre=unchanged}}
 
{{PacketList|{{change|0x36|0x38}}|Remove Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x37|0x39}}|Resource Pack Send|pre=unchanged}}
 
{{PacketList|{{change|0x38|0x3A}}|Respawn}}
 
{{PacketList|{{change|0x39|0x3B}}|Entity Head Look|pre=unchanged}}
 
{{PacketList|{{change|0x3A|0x3C}}|Select Advancement Tab|pre=unchanged}}
 
{{PacketList|{{change|0x3B|0x3D}}|World Border|pre=unchanged}}
 
{{PacketList|{{change|0x3C|0x3E}}|Camera|pre=unchanged}}
 
{{PacketList|{{change|0x3D|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
 
{{PacketList|0x40|Update View Position|rel=added}}
 
{{PacketList|0x41|Update View Distance|rel=added}}
 
{{PacketList|{{change|0x3E|0x42}}|Display Scoreboard|pre=unchanged}}
 
{{PacketList|{{change|0x3F|0x43}}|Entity Metadata|pre=unchanged}}
 
{{PacketList|{{change|0x40|0x44}}|Attach Entity|pre=unchanged}}
 
{{PacketList|{{change|0x41|0x45}}|Entity Velocity|pre=unchanged}}
 
{{PacketList|{{change|0x42|0x46}}|Entity Equipment|pre=unchanged}}
 
{{PacketList|{{change|0x43|0x47}}|Set Experience|pre=unchanged}}
 
{{PacketList|{{change|0x44|0x48}}|Update Health|pre=unchanged}}
 
{{PacketList|{{change|0x45|0x49}}|Scoreboard Objective|pre=unchanged}}
 
{{PacketList|{{change|0x46|0x4A}}|Set Passengers|pre=unchanged}}
 
{{PacketList|{{change|0x47|0x4B}}|Teams|pre=unchanged}}
 
{{PacketList|{{change|0x48|0x4C}}|Update Score|pre=unchanged}}
 
{{PacketList|{{change|0x49|0x4D}}|Spawn Position|pre=unchanged}}
 
{{PacketList|{{change|0x4A|0x4E}}|Time Update|pre=unchanged}}
 
{{PacketList|{{change|0x4B|0x4F}}|Title|pre=unchanged}}
 
{{PacketList|0x50|Entity Sound Effect}}
 
{{PacketList|{{change|0x4D|0x51}}|Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x4C|0x52}}|Stop Sound|pre=unchanged}}
 
{{PacketList|{{change|0x4E|0x53}}|Player List Header And Footer|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x54}}|NBT Query Response|pre=unchanged}}
 
{{PacketList|{{change|0x4F|0x55}}|Collect Item|pre=unchanged}}
 
{{PacketList|{{change|0x50|0x56}}|Entity Teleport|pre=unchanged}}
 
{{PacketList|{{change|0x51|0x57}}|Advancements|pre=unchanged}}
 
{{PacketList|{{change|0x52|0x58}}|Entity Properties|pre=unchanged}}
 
{{PacketList|{{change|0x53|0x59}}|Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x54|0x5A}}|Declare Recipes}}
 
{{PacketList|{{change|0x55|0x5B}}|Tags}}
 
|-
 
!colspan="4"| Play serverbound
 
{{PacketList|0x00|Teleport Confirm|pre=unchanged}}
 
{{PacketList|0x01|Query Block NBT|pre=unchanged}}
 
{{PacketList|0x02|Set Difficulty}}
 
{{PacketList|{{change|0x02|0x03}}|Chat Message (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x03|0x04}}|Client Status|pre=unchanged}}
 
{{PacketList|{{change|0x04|0x05}}|Client Settings|pre=unchanged}}
 
{{PacketList|{{change|0x05|0x06}}|Tab-Complete (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x06|0x07}}|Confirm Transaction (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x07|0x08}}|Enchant Item|pre=unchanged}}
 
{{PacketList|{{change|0x08|0x09}}|Click Window|pre=unchanged}}
 
{{PacketList|{{change|0x09|0x0A}}|Close Window (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0A|0x0B}}|Plugin Message (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0B|0x0C}}|Edit Book|pre=unchanged}}
 
{{PacketList|{{change|0x0C|0x0D}}|Query Entity NBT|pre=unchanged}}
 
{{PacketList|{{change|0x0D|0x0E}}|Use Entity|pre=unchanged}}
 
{{PacketList|{{change|0x0E|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
 
{{PacketList|0x10|Lock Difficulty}}
 
{{PacketList|{{change|0x10|0x11}}|Player Position|pre=unchanged}}
 
{{PacketList|{{change|0x11|0x12}}|Player Position And Look (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x12|0x13}}|Player Look|pre=unchanged}}
 
{{PacketList|{{change|0x0F|0x14}}|Player|pre=unchanged}}
 
{{PacketList|{{change|0x13|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x16}}|Steer Boat|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x17}}|Pick Item|pre=unchanged}}
 
{{PacketList|{{change|0x16|0x18}}|Craft Recipe Request|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x1A}}|Player Digging|pre=unchanged}}
 
{{PacketList|{{change|0x19|0x1B}}|Entity Action|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x1C}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1D}}|Recipe Book Data}}
 
{{PacketList|{{change|0x1C|0x1E}}|Name Item|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x1F}}|Resource Pack Status|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x20}}|Advancement Tab|pre=unchanged}}
 
{{PacketList|{{change|0x1F|0x21}}|Select Trade|pre=unchanged}}
 
{{PacketList|{{change|0x20|0x22}}|Set Beacon Effect|pre=unchanged}}
 
{{PacketList|{{change|0x21|0x23}}|Held Item Change (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x22|0x24}}|Update Command Block|pre=unchanged}}
 
{{PacketList|{{change|0x23|0x25}}|Update Command Block Minecart|pre=unchanged}}
 
{{PacketList|{{change|0x24|0x26}}|Creative Inventory Action|pre=unchanged}}
 
{{PacketList|0x27|Update Jigsaw Block|rel=added}}
 
{{PacketList|{{change|0x25|0x28}}|Update Structure Block|pre=unchanged}}
 
{{PacketList|{{change|0x26|0x29}}|Update Sign|pre=unchanged}}
 
{{PacketList|{{change|0x27|0x2A}}|Animation (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x28|0x2B}}|Spectate|pre=unchanged}}
 
{{PacketList|{{change|0x29|0x2C}}|Player Block Placement}}
 
{{PacketList|{{change|0x2A|0x2D}}|Use Item|pre=unchanged}}
 
|}
 
  
 
== New/modified data types ==
 
== New/modified data types ==
Line 194: Line 21:
 
== Entity Metadata ==
 
== 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. }}
+
No changes so far.
{{Warning2|Data has not been updated for changes in 19w12a}}
 
 
 
=== 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 ===
 
=== Entity ===
  
The base class.
+
No changes so far.
  
{| class="wikitable"
+
== Block Actions ==
! 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 ===
+
No changes so far.
 
 
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 [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
An empty item behaves as if the item were a <code>minecraft:egg</code>.
 
 
 
=== Ender Pearl ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
An empty item behaves as if the item were a <code>minecraft:ender_pearl</code>.
 
 
 
=== Experience Bottle ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
<code>minecraft:experience_bottle</code>
 
 
 
=== Snowball ===
 
 
 
Extends [[#Throwable|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]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
|rowspan="5"| {{change|6|7}}
 
|rowspan="5"| Byte
 
|colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
 
|rowspan="5"| 0
 
|-
 
! Bit mask
 
! Meaning
 
|-
 
| 0x01
 
| Is hand active
 
|-
 
| 0x02
 
| Active hand (0 = main hand, 1 = offhand)
 
|-
 
| 0x04
 
| In riptide spin attack
 
|-
 
| {{change|7|8}}
 
| Float
 
|colspan="2"| Health
 
| 1.0
 
|-
 
| {{change|8|9}}
 
| VarInt
 
|colspan="2"| Potion effect color (or 0 if there is no effect)
 
| 0
 
|-
 
| {{change|9|10}}
 
| 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}}
 
| VarInt
 
|colspan="2"| Number of arrows in entity
 
| 0
 
|- {{Added}}
 
| 12
 
| OptBlockPos
 
|colspan="2"| Unknown (Bed location?)
 
| Absent
 
|}
 
 
 
=== Ravager ===
 
 
 
Extends [[#Monster|Monster]]
 
 
 
No additional metadata.
 
 
 
{| class="wikitable" {{added}}
 
! Status
 
!colspan="2"| Description
 
|-
 
| 4
 
|colspan="2"| Starts the attack animation.
 
|-
 
| 39
 
|colspan="2"| Starts the stun animation.
 
|}
 
 
 
=== Panda ===
 
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| Integer
 
|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.
 
| 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
 
| Byte
 
|colspan="2"| Main Gene
 
| 0
 
|-
 
| 19
 
| Byte
 
|colspan="2"| Hidden Gene
 
| 0
 
|-
 
|rowspan="6"| 20
 
|rowspan="6"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="6"| 0
 
|-
 
| 0x01
 
| Unused
 
|-
 
| 0x02
 
| 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)
 
| 0 (red)
 
|-
 
| 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
 
|}
 
 
 
=== Pillager ===
 
 
 
Extends [[#Abstract Illager|Abstract Illlager]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| Boolean
 
| colspan="2"| Using crossbow
 
| false
 
|}
 
 
 
=== Ocelot ===
 
 
 
Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|- {{removed}}
 
| 15
 
| VarInt
 
|colspan="2"| Type (0 = untamed, 1 = tuxedo, 2 = tabby, 3 = siamese).  Used to render regardless as to whether it is tamed or not.
 
| 0
 
|- {{added}}
 
| 15
 
| Boolean
 
|colspan="2"| Is trusting
 
| false
 
|}
 
 
 
{| class="wikitable" {{added}}
 
! Status
 
!colspan="2"| Description
 
|-
 
| 40
 
|colspan="2"| Spawn smoke particles (trust gaining failed)
 
|-
 
| 41
 
|colspan="2"| Spawn heart particles (trust gaining succeeded)
 
|}
 
 
 
=== Cat ===
 
 
 
Extends [[#TameableAnimal|TameableAnimal]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 17
 
| VarInt
 
|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
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 19
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 20
 
| VarInt
 
|colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 
| 14 (Red)
 
|}
 
 
 
=== Horse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|15|17}}
 
| VarInt
 
|colspan="2"| Variant (Color & Style)
 
| 0
 
|- {{removed}}
 
| 16
 
| VarInt
 
|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)}}
 
 
 
=== Trader Llama ===
 
 
 
Extends [[#Llama|Llama]].
 
 
 
No additional metadata.
 
 
 
=== Villager ===
 
 
 
Extends [[#Ageable|Ageable]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|13|15}}
 
| {{change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession (Farmer = 0, Librarian = 1, Priest = 2, Blacksmith = 3, Butcher = 4, Nitwit = 5)|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
  
=== Zombie Villager ===
+
== Inventories ==
 
 
Extends [[#Zombie|Zombie]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|16|18}}
 
| Boolean
 
|colspan="2"| Is converting
 
| false
 
|-
 
| {{change|17|19}}
 
| {{Change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
 
 
== Block Actions ==
 
  
 
No changes so far.
 
No changes so far.
Line 974: Line 37:
 
== Plugin Channels ==
 
== Plugin Channels ==
  
=== <code>minecraft:book_open</code> ===
+
No changes so far.
{{change|''Server to client''}}
 
 
 
{{change|When a player right clicks with a signed book. This tells the client to open the book GUI.}}
 
 
 
{{change|The payload is a VarInt enum for the selected hand: 0 for the main hand, 1 for the offhand.}}
 
 
 
{{change||Replaced with [[#Open Book|Open Book]] packet.}}
 
 
 
=== <code>minecraft:trader_list</code> ===
 
{{change|''Server to client''}}
 
 
 
{{change|The list of trades a villager NPC is offering.}}
 
 
 
{{change||Replaced with [[#Trade List|Trade List]] packet.}}
 
 
 
=== <code>minecraft:debug/poi_ticket_count</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/poi_added</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/poi_removed</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/village_sections</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/goal_selector</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/brain</code> ===
 
{{Need Info|Unknown channel}}
 
  
 
== Play ==
 
== Play ==
Line 1,007: Line 43:
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Spawn Object ====
+
No changes so far.
 
 
Sent by the server when a vehicle or other object is created.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="12"| 0x00
 
|rowspan="12"| Play
 
|rowspan="12"| Client
 
| Entity ID
 
| VarInt
 
| EID of the object
 
|-
 
| Object UUID
 
| UUID
 
|
 
|-
 
| Type
 
| {{change|Byte|VarInt}}
 
| The type of object. {{change|(see [[Entities#Objects]])|Uses the same entity type IDs as in Spawn Mob}}
 
|-
 
| X
 
| Double
 
|
 
|-
 
| Y
 
| Double
 
|
 
|-
 
| Z
 
| Double
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Data
 
| Int
 
| Meaning dependent on the value of the Type field, see [[Object Data]] for details.
 
|-
 
| Velocity X
 
| Short
 
|rowspan="3"| Same units as [[#Entity Velocity|Entity Velocity]].  Always sent, but only used when Data is greater than 0 (except for some entities which always ignore it; see [[Object Data]] for details).
 
|-
 
| Velocity Y
 
| Short
 
|-
 
| Velocity Z
 
| Short
 
|}
 
 
 
==== Update Block Entity ====
 
 
 
Sets the block entity associated with the block at the given location.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x09
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Location
 
| Position
 
|
 
|-
 
| 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)
 
|}
 
 
 
''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''': {{change|Declare a shulker box, no data appears to be sent and the client seems to do fine without this packet. Perhaps it is a leftover from earlier versions?}}
 
* '''11''': Declare a bed
 
* '''12''': {{Change||Set data of a jigsaw block}}
 
* '''13''': {{Change||Set items in a campfire}}
 
 
 
==== Server Difficulty ====
 
 
 
Changes the difficulty setting in the client's option menu
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x0D
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Difficulty
 
| Unsigned Byte
 
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
|- {{Added}}
 
| Difficulty locked?
 
| Boolean
 
|
 
|}
 
 
 
==== Open Horse Window ====
 
 
 
{{Change||This packet is used exclusively for opening the horse GUI.  [[#Open Window|Open Window]] is used for all other GUIs, and now has ID 0x59.}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x1F
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Window ID?
 
| Byte
 
|
 
|-
 
| Number of slots?
 
| VarInt
 
|
 
|-
 
| Entity ID?
 
| Integer
 
|
 
|}
 
 
 
==== Chunk Data ====
 
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
 
 
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
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="9"| {{Change|0x22|0x21}}
 
|rowspan="9"| Play
 
|rowspan="9"| 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#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).
 
|- {{Added}}
 
| 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).
 
|-
 
| 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]]
 
| All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
|}
 
 
 
===== 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 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.
 
|-
 
| Biomes
 
| Optional Int Array
 
| Only sent if Ground-Up Continuous is true; 256 entries if present
 
|}
 
 
 
===== Chunk Section structure =====
 
 
 
A Chunk Section is defined in terms of other [[data types]]. A Chunk Section consists of the following fields:
 
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{added}}
 
| Block count
 
| Short
 
| Number of non-air blocks present in the chunk section, for lighting purposes.  "Non-air" is defined as any block other than air, cave air, and void air (in particular, note that fluids such as water are still counted).
 
|-
 
| Bits Per Block
 
| Unsigned Byte
 
| Determines how many bits are used to encode a block. Note that not all numbers are valid here.
 
|-
 
| Palette
 
| Varies
 
| See below for the format.
 
|-
 
| Data Array Length
 
| VarInt
 
| Number of longs in the following array
 
|-
 
| Data Array
 
| Array of Long
 
| Compacted list of 4096 indices pointing to state IDs in the Palette
 
|- {{removed}}
 
| Block Light
 
| Byte Array
 
| Half byte per block
 
|- {{removed}}
 
| Sky Light
 
| Optional Byte Array
 
| Only if in the Overworld; half byte per block
 
|}
 
 
 
Data Array{{change|, Block Light, and Sky Light are|is}} given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates.  {{change|For the half-byte light arrays, even-indexed items (those with an even x coordinate, starting at 0) are packed into the ''low bits'', odd-indexed into the ''high bits''.}}
 
 
 
==== Join Game ====
 
 
 
See [[Protocol Encryption]] for information on logging in.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="8"| 0x25
 
|rowspan="8"| Play
 
|rowspan="8"| 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.
 
|- {{removed}}
 
| Difficulty
 
| Unsigned Byte
 
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
|-
 
| 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, default_1_1
 
|- {{added}}
 
| View Distance
 
| VarInt
 
| Render distance (2-32)
 
|-
 
| Reduced Debug Info
 
| Boolean
 
| If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
|}
 
 
 
==== Map Data ====
 
 
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="17"| 0x26
 
|rowspan="17"| Play
 
|rowspan="17"| Client
 
|colspan="2"| Map ID
 
|colspan="2"| VarInt
 
| Map ID of the map being modified
 
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|-
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether player and item frame icons are shown
 
|- {{Added}}
 
|colspan="2"| Locked
 
|colspan="2"| Boolean
 
| True if the map has been locked in a cartography table
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="5"| Icon
 
| Type
 
|rowspan="6"| Array
 
| VarInt enum
 
| See below
 
|-
 
| X
 
| Byte
 
| Map coordinates: -128 for furthest left, +127 for furthest right
 
|-
 
| Z
 
| Byte
 
| Map coordinates: -128 for highest, +127 for lowest
 
|-
 
| Direction
 
| Byte
 
| 0-15
 
|-
 
| Has Display Name
 
| Boolean
 
|
 
|-
 
| Display Name
 
| Optional [[Chat]]
 
| Only present if previous Boolean is true
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
|-
 
|colspan="2"| Rows
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; number of rows updated
 
|-
 
|colspan="2"| X
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; x offset of the westernmost column
 
|-
 
|colspan="2"| Z
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; z offset of the northernmost row
 
|-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
| Only if Columns is more than 0; length of the following array
 
|-
 
|colspan="2"| Data
 
|colspan="2"| Optional Array of Unsigned Byte
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
|}
 
 
 
For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
 
 
 
Types are based off of rows and columns in <code>map_icons.png</code>:
 
 
 
{| class="wikitable"
 
|-
 
! Icon type
 
! Result
 
|-
 
| 0
 
| White arrow (players)
 
|-
 
| 1
 
| Green arrow (item frames)
 
|-
 
| 2
 
| Red arrow
 
|-
 
| 3
 
| Blue arrow
 
|-
 
| 4
 
| White cross
 
|-
 
| 5
 
| Red pointer
 
|-
 
| 6
 
| White circle (off-map players)
 
|-
 
| 7
 
| Small white circle (far-off-map players)
 
|-
 
| 8
 
| Mansion
 
|-
 
| 9
 
| Temple
 
|-
 
| 10
 
| White Banner
 
|-
 
| 11
 
| Orange Banner
 
|-
 
| 12
 
| Magenta Banner
 
|-
 
| 13
 
| Light Blue Banner
 
|-
 
| 14
 
| Yellow Banner
 
|-
 
| 15
 
| Lime Banner
 
|-
 
| 16
 
| Pink Banner
 
|-
 
| 17
 
| Gray Banner
 
|-
 
| 18
 
| Light Gray Banner
 
|-
 
| 19
 
| Cyan Banner
 
|-
 
| 20
 
| Purple Banner
 
|-
 
| 21
 
| Blue Banner
 
|-
 
| 22
 
| Brown Banner
 
|-
 
| 23
 
| Green Banner
 
|-
 
| 24
 
| Red Banner
 
|-
 
| 25
 
| Black Banner
 
|-
 
| 26
 
| Treasure marker
 
|}
 
 
 
==== Open Book ====
 
 
 
Sent when a player right clicks with a signed book. This tells the client to open the book GUI.
 
 
 
{| class="wikitable" {{Added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x2F
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| Hand
 
| VarInt enum
 
| 0: Main hand, 1: Off hand
 
|}
 
 
 
==== Use Bed ====
 
 
 
{{change|This packet tells that a player goes to bed.}}
 
 
 
{{change|The client with the matching Entity ID will go into bed mode.}}
 
 
 
{{change|This Packet is sent to all nearby players including the one sent to bed.}}
 
 
 
{{change|Any packets sent with a location not currently occupied by a bed will be ignored by clients.}}
 
 
 
{| class="wikitable" {{removed}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x33
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Entity ID
 
| VarInt
 
| Sleeping player's EID
 
|-
 
| Location
 
| Position
 
| Block location of the head part of the bed
 
|}
 
 
 
==== 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
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x3A
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Dimension
 
| Int Enum
 
| -1: The Nether, 0: The Overworld, 1: The End
 
|- {{removed}}
 
| Difficulty
 
| Unsigned Byte
 
| 0: Peaceful, 1: Easy, 2: Normal, 3: Hard
 
|-
 
| 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|Join Game]]
 
|}
 
 
 
{{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).
 
 
 
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.}}
 
 
 
==== Entity Sound Effect ====
 
 
 
Plays a sound effect from an entity.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| 0x50
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Sound ID
 
| VarInt
 
| ID of hardcoded sound event ([https://pokechu22.github.io/Burger/18w48a.html#sounds events] as of 18w48a)
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Entity ID
 
| VarInt
 
|
 
|-
 
| Volume
 
| Float
 
| 1.0 is 100%, capped between 0.0 and 1.0 by Notchian clients
 
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
|}
 
 
 
==== Declare Recipes ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x54|0x5A}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
|colspan="2"| Num Recipes
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Recipe
 
|{{removed}}| Recipe ID
 
|rowspan="4"| Array
 
|{{removed}}| Identifier
 
|{{removed}}|
 
|-
 
| Type
 
| {{Change|String|Identifier}}
 
| The recipe serializer, see below
 
|- {{Added}}
 
| Recipe ID
 
| Identifier
 
|
 
|-
 
| Data
 
| Optional, varies
 
| Additional data for the recipe.  For some types, there will be no data.
 
|}
 
 
 
Recipe serializers:
 
 
 
{| class="wikitable"
 
! Serializer
 
! Description
 
! Data
 
|-
 
| <code>{{change||minecraft:}}crafting_shapeless</code>
 
| Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredient count
 
    | VarInt
 
    | Number of elements in the following array
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>{{change||minecraft:}}crafting_shaped</code>
 
| Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Width
 
    | VarInt
 
    |
 
    |-
 
    | Height
 
    | VarInt
 
    |
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    | Length is width * height.  Indexed by x + (y * width).
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>{{change||minecraft:}}crafting_special_armordye</code>
 
| Recipe for dying leather armor
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bookcloning</code>
 
| Recipe for copying contents of written books
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapcloning</code>
 
| Recipe for copying maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapextending</code>
 
| Recipe for adding paper to maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_rocket</code>
 
| Recipe for making firework rockets
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star</code>
 
| Recipe for making firework stars
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star_fade</code>
 
| Recipe for making firework stars fade between multiple colors
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_repairitem</code>
 
| Recipe for repairing items via crafting
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_tippedarrow</code>
 
| Recipe for crafting tipped arrows
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bannerduplicate</code>
 
| Recipe for copying banner patterns
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_banneraddpattern</code>
 
| Recipe for adding patterns to banners
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shielddecoration</code>
 
| Recipe for applying a banner's pattern to a shield
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shulkerboxcoloring</code>
 
| Recipe for recoloring a shulker box
 
| None
 
|- {{Added}}
 
| <code>minecraft:crafting_special_suspiciousstew</code>
 
| Recipe for crafting suspicious stew with various affects.
 
| None
 
|-
 
| <code>{{change||minecraft:}}smelting</code>
 
| Smelting recipe
 
|rowspan="4"| All of these have the same format, as follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |-
 
    | Experience
 
    | Float
 
    |
 
    |-
 
    | Cooking time
 
    | VarInt
 
    |
 
    |}
 
|- {{Added}}
 
| <code>minecraft:blasting</code>
 
| Recipes in a blast furnace.
 
|- {{Added}}
 
| <code>minecraft:smoking</code>
 
| Recipes in a smoker.
 
|- {{Added}}
 
| <code>minecraft:campfire_cooking</code>
 
| Recipes in a campfire.
 
|}
 
 
 
Ingredient is defined as:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Description
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Items
 
| Array of [[Slot]]
 
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
|}
 
 
 
==== Tags ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| {{change|0x55|0x5B}}
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Block Tags
 
| (See below)
 
| IDs are block IDs
 
|-
 
| Item Tags
 
| (See below)
 
| IDs are item IDs
 
|-
 
| Fluid Tags
 
| (See below)
 
| IDs are fluid IDs
 
|- {{added}}
 
| Entity Tags
 
| (See below)
 
| IDs are entity type IDs
 
|}
 
 
 
==== Update Light ====
 
 
 
Updates light levels for a chunk.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="8"| 0x24
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| Chunk X
 
| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Chunk Z
 
| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Sky Light Mask
 
| VarInt
 
| Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
 
|-
 
| Block Light Mask
 
| VarInt
 
| Mask containing 18 bits, with the same order as sky light
 
|-
 
| Empty Sky Light Mask
 
| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
 
|-
 
| Empty Block Light Mask
 
| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their block light values.  If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the block light arrays.
 
|-
 
| Sky Light arrays
 
| Array of arrays of 2048 bytes
 
| There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
 
|-
 
| Block Light arrays
 
| Array of arrays of 2048 bytes
 
| There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
 
|}
 
 
 
Individual block or sky light arrays are is given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates. Even-indexed items (those with an even x coordinate, starting at 0) are packed into the low bits, odd-indexed into the high bits.
 
 
 
==== Open Window ====
 
 
 
This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.  {{change||For horses, use [[#Open Horse Window|Open Horse Window]]}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{change|0x14|0x2E}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Window ID
 
| {{change|Unsigned Byte|VarInt}}
 
| A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
 
|-
 
| Window Type
 
| {{change|String (32)|VarInt}}
 
| The window type to use for display. {{change|See [[Inventory]] for a list|contained in the <code>minecraft:menu</code> regisry}}.
 
|-
 
| Window Title
 
| [[Chat]]
 
| The title of the window
 
|- {{removed}}
 
| Number Of Slots
 
| Unsigned Byte
 
| Number of slots in the window (excluding the number of slots in the player inventory). Always 0 for non-storage windows (e.g. Workbench, Anvil).
 
|- {{removed}}
 
| Entity ID
 
| Optional Int
 
| EntityHorse's EID. Only sent when Window Type is “EntityHorse”
 
|}
 
 
 
==== Trade List ====
 
 
 
The list of trades a villager NPC is offering.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="16"| 0x27
 
|rowspan="16"| Play
 
|rowspan="16"| Client
 
|-
 
| colspan="2" | Window ID
 
| colspan="2" | VarInt
 
| The ID of the window that is open; this is an int rather than a byte.
 
|-
 
| colspan="2" | Size
 
| colspan="2" | Byte
 
| The number of trades in the following array
 
|-
 
| rowspan="10" | Trades
 
| Input item 1
 
| rowspan="10" | Array
 
| [[Slot]]
 
| The first item the villager is buying
 
|-
 
| Output item
 
| [[Slot]]
 
| The item the villager is selling
 
|-
 
| Has second item
 
| Boolean
 
| Whether there is a second item
 
|-
 
| Input item 2
 
| Optional [[Slot]]
 
| The second item the villager is buying; only present if they have a second item.
 
|-
 
| Trade disabled
 
| Boolean
 
| True if the trade is disabled; false if the trade is enabled.
 
|-
 
| Number of trade uses
 
| Integer
 
| Number of times the trade has been used so far
 
|-
 
| Maximum number of trade uses
 
| Integer
 
| Number of times this trade can be used
 
|- {{Added}}
 
| XP
 
| Integer
 
|
 
|- {{Added}}
 
| Special Price
 
| Integer
 
|
 
|- {{Added}}
 
| Price Multiplier
 
| Float
 
|
 
|- {{Added}}
 
|colspan="2"| Villager level
 
|colspan="2"| VarInt
 
| Appears on the trade GUI; meaning comes from the translation key <code>merchant.level.</code> + level.
 
1: Novice, 2: Apprentice, 3: Journeyman, 4: Expert, 5: Master
 
|- {{Added}}
 
|colspan="2"| Experience
 
|colspan="2"| VarInt
 
| Total experience for this villager (always 0 for the wandering trader)
 
|- {{Added}}
 
|colspan="2"| Is regular villager
 
|colspan="2"| Boolean
 
| True if this is a regular villager; false for the wandering trader.  When false, hides the villager level and some other GUI elements.
 
|}
 
 
 
==== Update View Position ====
 
 
 
{{Need Info|Why is this even needed?  Is there a better name for it?  My guess is that it's something to do with logical behavior with latency, but it still seems weird.}}
 
 
 
Updates the client's location.  This is used to determine what chunks should remain loaded and if a chunk load should be ignored; chunks outside of the view distance may be unloaded.
 
 
 
Sent whenever the player moves across a chunk border horizontally, and also (according to testing) for any integer change in the vertical axis, even if it doesn't go across a chunk section border.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x40
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Chunk X
 
| VarInt
 
| Chunk X coordinate of the player's position
 
|-
 
| Chunk Z
 
| VarInt
 
| Chunk Z coordinate of the player's position
 
|}
 
 
 
==== Update View Distance ====
 
 
 
Sent by the integrated singleplayer server when changing render distance.  Does not appear to be used by the dedicated server, as <code>view-distance</code> in server.properties cannot be changed at runtime.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x41
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| View Distance
 
| VarInt
 
| Render distance (2-32)
 
|}
 
 
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Set Difficulty ====
+
No changes so far.
 
 
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
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x02
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| New difficulty
 
| Byte
 
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
|}
 
 
 
==== Lock 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
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x0F
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Locked
 
| Boolean
 
|
 
|}
 
 
 
==== Recipe Book Data ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="11"| {{change|0x1B|0x1D}}
 
|rowspan="11"| Play
 
|rowspan="11"| Server
 
|colspan="2"| Type
 
| VarInt
 
| Determines the format of the rest of the packet
 
|-
 
! Type
 
! Field Name
 
!
 
!
 
|-
 
| 0: Displayed Recipe
 
| Recipe ID
 
| Identifier
 
| A recipe ID
 
|-
 
|rowspan="8"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
| Boolean
 
| Whether the player has the crafting recipe book currently opened/active.
 
|-
 
| Crafting Recipe Filter Active
 
| Boolean
 
| Whether the player has the crafting recipe book filter option currently active.
 
|-
 
| Smelting Recipe Book Open
 
| Boolean
 
| Whether the player has the smelting recipe book currently opened/active.
 
|-
 
| Smelting Recipe Filter Active
 
| Boolean
 
| Whether the player has the smelting recipe book filter option currently active.
 
|- {{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.
 
 
 
==== Update Jigsaw Block ====
 
 
 
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x27
 
|rowspan="4"| Play
 
|rowspan="4"| Server
 
| Location
 
| Position
 
| Block entity location
 
|-
 
| Attachment type
 
| Identifier
 
|
 
|-
 
| Target pool
 
| Identifier
 
|
 
|-
 
| Final state
 
| String
 
| "Turns into" on the GUI, <code>final_state</code> in NBT
 
|}
 
 
 
==== Player Block Placement ====
 
 
 
{| class="wikitable"
 
|-
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="9"| {{change|0x29|0x2C}}
 
|rowspan="9"| Play
 
|rowspan="9"| Server
 
|{{removed}}| Location
 
|{{removed}}| Position
 
|{{removed}}| Block position
 
|- {{removed}}
 
| Face
 
| VarInt Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
|-
 
| Hand
 
| VarInt Enum
 
| The hand from which the block is placed; 0: main hand, 1: off hand
 
|- {{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
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from north to south
 
|- {{added}}
 
| Inside block
 
| Boolean
 
| True when the player's head is inside of a block.
 
|}
 
 
 
Upon placing a block, this packet is sent once.
 
 
 
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.
 
 
 
{{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).}}
 
 
 
== 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.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x00
 
|rowspan="4"| Handshaking
 
|rowspan="4"| Server
 
| Protocol Version
 
| VarInt
 
| See [[protocol version numbers]] (currently {{change|404|473}})
 
|-
 
| 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.
 
|-
 
| Server Port
 
| Unsigned Short
 
| Default is 25565.  The Notchian server does not use this information.
 
|-
 
| Next State
 
| VarInt Enum
 
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
|}
 
  
 
== Status ==
 
== Status ==

Latest revision as of 04:12, 29 July 2022

This page documents the changes from the last stable Minecraft release (currently 1.18.2, protocol 758) to the current pre-release (currently 22w16b, protocol Snapshot 81). 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.

Contents

Data types

No changes so far.

Packets

No changes so far.

New/modified data types

No changes so far.

Entity Metadata

No changes so far.

Entity

No changes so far.

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

No changes so far.

Serverbound

No changes so far.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.