Difference between revisions of "Pre-release protocol"

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(1.16.3, no changes other than PVN)
 
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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-pre5, protocol 476]]). 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|1.15.2, protocol 578]]) to the current pre-release (currently [[Protocol version numbers|1.16.3, protocol 753]]). 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 ====
+
The UUID type is now also sometimes encoded by the Notchian server as an array of four 32-bit integers, from most significant to least significant (matching the new format used on entity NBT). This representation is identical to using 16 bytes, two 64-bit integers, or one 128-bit integers.
 
 
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 ===
Line 45: Line 22:
 
  |-
 
  |-
 
!colspan="4"| Play clientbound
 
!colspan="4"| Play clientbound
{{PacketList|0x00|Spawn Object}}
+
{{PacketList|0x02|Spawn Weather Entity|pre=removed}}
{{PacketList|0x01|Spawn Experience Orb|pre=unchanged}}
+
{{PacketList|{{change|0x03|0x02}}|Spawn Living Entity|pre=unchanged}}
{{PacketList|0x02|Spawn Global Entity|pre=unchanged}}
+
{{PacketList|{{change|0x04|0x03}}|Spawn Painting|pre=unchanged}}
{{PacketList|0x03|Spawn Mob|pre=unchanged}}
+
{{PacketList|{{change|0x05|0x04}}|Spawn Player|pre=unchanged}}
{{PacketList|0x04|Spawn Painting|pre=unchanged}}
+
{{PacketList|{{change|0x06|0x05}}|Entity Animation (clientbound)|pre=unchanged}}
{{PacketList|0x05|Spawn Player|pre=unchanged}}
+
{{PacketList|{{change|0x07|0x06}}|Statistics|pre=unchanged}}
{{PacketList|0x06|Animation (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x07}}|Acknowledge Player Digging|pre=unchanged}}
{{PacketList|0x07|Statistics|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x08}}|Block Break Animation|pre=unchanged}}
{{PacketList|0x08|Block Break Animation|pre=unchanged}}
+
{{PacketList|{{change|0x0A|0x09}}|Block Entity Data|pre=unchanged}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x0B|0x0A}}|Block Action|pre=unchanged}}
{{PacketList|0x0A|Block Action|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0B}}|Block Change|pre=unchanged}}
{{PacketList|0x0B|Block Change|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0C}}|Boss Bar|pre=unchanged}}
{{PacketList|0x0C|Boss Bar|pre=unchanged}}
+
{{PacketList|{{change|0x0E|0x0D}}|Server Difficulty|pre=unchanged}}
{{PacketList|0x0D|Server Difficulty}}
+
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)}}
{{PacketList|0x0E|Chat Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x11|0x0F}}|Tab-Complete (clientbound)|pre=unchanged}}
{{PacketList|0x0F|Multi Block Change|pre=unchanged}}
+
{{PacketList|{{change|0x12|0x10}}|Declare Commands|pre=unchanged}}
{{PacketList|0x10|Tab-Complete (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x13|0x11}}|Window Confirmation (clientbound)|pre=unchanged}}
{{PacketList|0x11|Declare Commands|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x12}}|Close Window (clientbound)|pre=unchanged}}
{{PacketList|0x12|Confirm Transaction (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x13}}|Window Items|pre=unchanged}}
{{PacketList|0x13|Close Window (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x14}}|Window Property|pre=unchanged}}
{{PacketList|{{change|0x15|0x14}}|Window Items|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x15}}|Set Slot|pre=unchanged}}
{{PacketList|{{change|0x16|0x15}}|Window Property|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x16}}|Set Cooldown|pre=unchanged}}
{{PacketList|{{change|0x17|0x16}}|Set Slot|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x17}}|Plugin Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x18|0x17}}|Set Cooldown|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x18}}|Named Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x19|0x18}}|Plugin Message (clientbound)}}
+
{{PacketList|{{change|0x1B|0x19}}|Disconnect (play)|pre=unchanged}}
{{PacketList|{{change|0x1A|0x19}}|Named Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1A}}|Entity Status|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1A}}|Disconnect (play)|pre=unchanged}}
+
{{PacketList|{{change|0x1D|0x1B}}|Explosion|pre=unchanged}}
{{PacketList|{{change|0x1C|0x1B}}|Entity Status|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x1C}}|Unload Chunk|pre=unchanged}}
{{PacketList|{{change|0x1E|0x1C}}|Explosion|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x1D}}|Change Game State|pre=unchanged}}
{{PacketList|{{change|0x1F|0x1D}}|Unload Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x1E}}|Open Horse Window|pre=unchanged}}
{{PacketList|{{change|0x20|0x1E}}|Change Game State|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x1F}}|Keep Alive (clientbound)|pre=unchanged}}
{{PacketList|0x1F|Open Horse Window}}
+
{{PacketList|{{change|0x22|0x20}}|Chunk Data}}
{{PacketList|{{change|0x21|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x21}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x22|0x21}}|Chunk Data}}
+
{{PacketList|{{change|0x24|0x22}}|Particle|pre=unchanged}}
{{PacketList|{{change|0x23|0x22}}|Effect|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x23}}|Update Light}}
{{PacketList|{{change|0x24|0x23}}|Particle|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x24}}|Join Game}}
{{PacketList|0x24|Update Light}}
+
{{PacketList|{{change|0x27|0x25}}|Map Data|pre=unchanged}}
{{PacketList|0x25|Join Game}}
+
{{PacketList|{{change|0x28|0x26}}|Trade List|pre=unchanged}}
{{PacketList|0x26|Map Data}}
+
{{PacketList|{{change|0x29|0x27}}|Entity Position|pre=unchanged}}
{{PacketList|0x27|Trade List}}
+
{{PacketList|{{change|0x2A|0x28}}|Entity Position and Rotation|pre=unchanged}}
{{PacketList|0x28|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x2B|0x29}}|Entity Rotation|pre=unchanged}}
{{PacketList|0x29|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2A}}|Entity Movement|pre=unchanged}}
{{PacketList|0x2A|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2B}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x27|0x2B}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x2C}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x2F|0x2D}}|Open Window|pre=unchanged}}
{{PacketList|0x2D|Open Book}}
+
{{PacketList|{{change|0x30|0x2E}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x14|0x2E}}|Open Window}}
+
{{PacketList|{{change|0x31|0x2F}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2F}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x32|0x30}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x2D|0x30}}|Craft Recipe Response|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x31}}|Combat Event|pre=unchanged}}
{{PacketList|{{change|0x2E|0x31}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x32}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x2F|0x32}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x33}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x33}}|Use Bed|pre=removed}}
+
{{PacketList|{{change|0x36|0x34}}|Player Position And Look (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x30|0x33}}|Player Info|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x35}}|Unlock Recipes}}
{{PacketList|{{change|0x31|0x34}}|Face Player|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x36}}|Destroy Entities|pre=unchanged}}
{{PacketList|{{change|0x32|0x35}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x37}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x34|0x36}}|Unlock Recipes|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x38}}|Resource Pack Send|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x39}}|Respawn}}
{{PacketList|{{change|0x36|0x38}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x3A}}|Entity Head Look|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|{{change|0x10|0x3B}}|Multi Block Change}}
{{PacketList|{{change|0x38|0x3A}}|Respawn}}
+
{{PacketList|{{change|0x3D|0x3C}}|Select Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x3E|0x3D}}|World Border|pre=unchanged}}
{{PacketList|{{change|0x3A|0x3C}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x3F|0x3E}}|Camera|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|World Border|pre=unchanged}}
+
{{PacketList|{{change|0x40|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x3C|0x3E}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x40}}|Update View Position|pre=unchanged}}
{{PacketList|{{change|0x3D|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x41}}|Update View Distance|pre=unchanged}}
{{PacketList|0x40|Update View Position|rel=added}}
+
{{PacketList|0x47|Entity Equipment}}
{{PacketList|0x41|Update View Distance|rel=added}}
+
{{PacketList|{{change|0x4E|0x42}}|Spawn Position|pre=unchanged}}
{{PacketList|{{change|0x3E|0x42}}|Display Scoreboard|pre=unchanged}}
+
{{PacketList|{{change|0x4F|0x4E}}|Time Update|pre=unchanged}}
{{PacketList|{{change|0x3F|0x43}}|Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x50|0x4F}}|Title|pre=unchanged}}
{{PacketList|{{change|0x40|0x44}}|Attach Entity|pre=unchanged}}
+
{{PacketList|{{change|0x51|0x50}}|Entity Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x41|0x45}}|Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x52|0x51}}|Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x42|0x46}}|Entity Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x53|0x52}}|Stop Sound|pre=unchanged}}
{{PacketList|{{change|0x43|0x47}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x54|0x53}}|Player List Header And Footer|pre=unchanged}}
{{PacketList|{{change|0x44|0x48}}|Update Health|pre=unchanged}}
+
{{PacketList|{{change|0x55|0x54}}|NBT Query Response|pre=unchanged}}
{{PacketList|{{change|0x45|0x49}}|Scoreboard Objective|pre=unchanged}}
+
{{PacketList|{{change|0x56|0x55}}|Collect Item|pre=unchanged}}
{{PacketList|{{change|0x46|0x4A}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x57|0x56}}|Entity Teleport|pre=unchanged}}
{{PacketList|{{change|0x47|0x4B}}|Teams|pre=unchanged}}
+
{{PacketList|{{change|0x58|0x57}}|Advancements|pre=unchanged}}
{{PacketList|{{change|0x48|0x4C}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x59|0x58}}|Entity Properties}}
{{PacketList|{{change|0x49|0x4D}}|Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x5A|0x59}}|Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4E}}|Time Update|pre=unchanged}}
+
{{PacketList|{{change|0x5B|0x5A}}|Declare Recipes}}
{{PacketList|{{change|0x4B|0x4F}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x5C|0x5B}}|Tags|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
 
!colspan="4"| Play serverbound
{{PacketList|0x00|Teleport Confirm|pre=unchanged}}
+
{{PacketList|0x0E|Interact Entity}}
{{PacketList|0x01|Query Block NBT|pre=unchanged}}
+
{{PacketList|0x0F|Generate Structure|rel=added}}
{{PacketList|0x02|Set Difficulty}}
+
{{PacketList|{{change|0x0F|0x10}}|Keep Alive (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x02|0x03}}|Chat Message (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x10|0x11}}|Lock Difficulty|pre=unchanged}}
{{PacketList|{{change|0x03|0x04}}|Client Status|pre=unchanged}}
+
{{PacketList|{{change|0x11|0x12}}|Player Position|pre=unchanged}}
{{PacketList|{{change|0x04|0x05}}|Client Settings|pre=unchanged}}
+
{{PacketList|{{change|0x12|0x13}}|Player Position And Rotation (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x05|0x06}}|Tab-Complete (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x13|0x14}}|Player Rotation|pre=unchanged}}
{{PacketList|{{change|0x06|0x07}}|Confirm Transaction (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x15}}|Player Movement|pre=unchanged}}
{{PacketList|{{change|0x07|0x08}}|Enchant Item|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x16}}|Vehicle Move (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x08|0x09}}|Click Window|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Steer Boat|pre=unchanged}}
{{PacketList|{{change|0x09|0x0A}}|Close Window (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Pick Item|pre=unchanged}}
{{PacketList|{{change|0x0A|0x0B}}|Plugin Message (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Craft Recipe Request|pre=unchanged}}
{{PacketList|{{change|0x0B|0x0C}}|Edit Book|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x1A}}|Player Abilities (serverbound)}}
{{PacketList|{{change|0x0C|0x0D}}|Query Entity NBT|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1B}}|Player Digging|pre=unchanged}}
{{PacketList|{{change|0x0D|0x0E}}|Use Entity|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1C}}|Entity Action|pre=unchanged}}
{{PacketList|{{change|0x0E|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1D}}|Steer Vehicle|pre=unchanged}}
{{PacketList|0x10|Lock Difficulty}}
+
{{PacketList|0x1D|Recipe Book Data|pre=removed}}
{{PacketList|{{change|0x10|0x11}}|Player Position|pre=unchanged}}
+
{{PacketList|0x1E|Set Displayed Recipe|rel=added}}
{{PacketList|{{change|0x11|0x12}}|Player Position And Look (serverbound)|pre=unchanged}}
+
{{PacketList|0x1F|Set Recipe Book State|rel=added}}
{{PacketList|{{change|0x12|0x13}}|Player Look|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x20}}|Name Item|pre=unchanged}}
{{PacketList|{{change|0x0F|0x14}}|Player|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x21}}|Resource Pack Status|pre=unchanged}}
{{PacketList|{{change|0x13|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x22}}|Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x14|0x16}}|Steer Boat|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x23}}|Select Trade|pre=unchanged}}
{{PacketList|{{change|0x15|0x17}}|Pick Item|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x24}}|Set Beacon Effect|pre=unchanged}}
{{PacketList|{{change|0x16|0x18}}|Craft Recipe Request|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x25}}|Held Item Change (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x17|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x24|0x26}}|Update Command Block|pre=unchanged}}
{{PacketList|{{change|0x18|0x1A}}|Player Digging|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x27}}|Update Command Block Minecart|pre=unchanged}}
{{PacketList|{{change|0x19|0x1B}}|Entity Action|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x28}}|Creative Inventory Action|pre=unchanged}}
{{PacketList|{{change|0x1A|0x1C}}|Steer Vehicle|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x29}}|Update Jigsaw Block}}
{{PacketList|{{change|0x1B|0x1D}}|Recipe Book Data}}
+
{{PacketList|{{change|0x28|0x2A}}|Update Structure Block|pre=unchanged}}
{{PacketList|{{change|0x1C|0x1E}}|Name Item|pre=unchanged}}
+
{{PacketList|{{change|0x29|0x2B}}|Update Sign|pre=unchanged}}
{{PacketList|{{change|0x1D|0x1F}}|Resource Pack Status|pre=unchanged}}
+
{{PacketList|{{change|0x2A|0x2C}}|Animation (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x1E|0x20}}|Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x2B|0x2D}}|Spectate|pre=unchanged}}
{{PacketList|{{change|0x1F|0x21}}|Select Trade|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2E}}|Player Block Placement|pre=unchanged}}
{{PacketList|{{change|0x20|0x22}}|Set Beacon Effect|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2F}}|Use Item|pre=unchanged}}
{{PacketList|{{change|0x21|0x23}}|Held Item Change (serverbound)|pre=unchanged}}
+
|-
{{PacketList|{{change|0x22|0x24}}|Update Command Block|pre=unchanged}}
+
!colspan="4"| Login clientbound
{{PacketList|{{change|0x23|0x25}}|Update Command Block Minecart|pre=unchanged}}
+
{{PacketList|0x02|Login Success}}
{{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}}
 
 
  |}
 
  |}
  
Line 194: Line 151:
 
== 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. }}
+
{{#vardefine:meta_prerelease|1}}
 
 
=== 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.
+
=== FishingHook ===
  
Entity Metadata is an array of entries, each of which looks like the following:
+
{{Metadata inherit|FishingHook|inherits=Entity|start_at=7}}
 
 
{| 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"
 
{| class="wikitable"
Line 372: Line 163:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="9"| 0
+
  | {{Metadata id|}}
|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
 
  | VarInt
  |colspan="2"| Air
+
  |colspan="2"| Hooked entity id + 1, or 0 if there is no hooked entity
  | 300
+
  | 0
  |-
+
  |- {{Added}}
  | 2
+
  | {{Metadata id|added}}
| OptChat
 
|colspan="2"| Custom name
 
| empty
 
|-
 
| 3
 
| Boolean
 
|colspan="2"| Is custom name visible
 
| false
 
|-
 
| 4
 
| Boolean
 
|colspan="2"| Is silent
 
| false
 
|-
 
| 5
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| No gravity
+
  |colspan="2"| Is catchable
  | false
+
  | False
|- {{Added}}
 
| 6
 
| Pose
 
|colspan="2"| Pose
 
| STANDING
 
 
  |}
 
  |}
  
=== Itemed Throwable ===
+
=== Abstract Arrow ===
  
Extends [[#Throwable|Throwable]].
+
{{Metadata inherit|Abstract Arrow|inherits=Entity|start_at=7}}
  
Used for all things that previously extended throwable other than potions, which already had an item.
+
Abstract base class for [[#Tipped Arrow|Tipped Arrow]] (which is used for regular arrows as well as tipped ones) and [[#Spectral Arrow|Spectral Arrow]].
 
 
{| 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"
 
{| class="wikitable"
Line 511: Line 186:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | rowspan="3" | {{change|6|7}}
+
  | rowspan="3" | {{Metadata id|}}
 
  | rowspan="3" | Byte
 
  | rowspan="3" | Byte
 
  ! Bit mask
 
  ! Bit mask
Line 522: Line 197:
 
  | 0x02
 
  | 0x02
 
  | Is noclip (used by loyalty tridents when returning)
 
  | Is noclip (used by loyalty tridents when returning)
  |-
+
  |- {{removed}}
  | {{change|7|8}}
+
  | {{Metadata id|removed}}
 
  | OptUUID
 
  | OptUUID
  |colspan="2"| Shooter UUID
+
  |colspan="2"| Unused
 
  | Empty
 
  | Empty
  |- {{added}}
+
  |-
| 9
+
| {{Metadata id|}}
 
  | Byte
 
  | Byte
  |colspan="2"| Piercing level
+
  |colspan="2"| Peircing level
 
  | 0
 
  | 0
 
  |}
 
  |}
  
=== TippedArrow ===
+
=== Tipped Arrow ===
  
Extends [[#Arrow|Arrow]].
+
{{Metadata inherit|Tipped Arrow|inherits=Abstract Arrow}}
  
 
Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
 
Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
Line 546: Line 221:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|8|10}}
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Color (-1 for no particles)
 
  |colspan="2"| Color (-1 for no particles)
 
  | -1
 
  | -1
 
  |}
 
  |}
 +
 +
=== Spectral Arrow ===
 +
 +
{{Metadata inherit|Spectral Arrow|inherits=Abstract Arrow}}
 +
 +
No additional metadata.
  
 
=== Trident ===
 
=== Trident ===
  
Extends [[#Arrow|Arrow]].
+
{{Metadata inherit|Trident|inherits=Abstract Arrow}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 562: Line 243:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|8|10}}
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Loyalty level (enchantment)
 
  |colspan="2"| Loyalty level (enchantment)
 
  | 0
 
  | 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}}
+
  | {{Metadata id|}}
| [[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
 
  | Boolean
  |colspan="2"| Shot at angle (from a crossbow)
+
  |colspan="2"| Has enchantment glint
  | false
+
  | False
 
  |}
 
  |}
  
=== Living ===
+
=== Strider ===
  
Extends [[#Entity|Entity]].
+
{{Metadata inherit|Strider|inherits=Animal|start_at=16}}
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 634: Line 264:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
|rowspan="5"| {{change|6|7}}
+
  | {{Metadata id|}}
|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
 
  | VarInt
  |colspan="2"| Potion effect color (or 0 if there is no effect)
+
  |colspan="2"| Total time to "boost" with warped fungus on a stick for
 
  | 0
 
  | 0
 
  |-
 
  |-
  | {{change|9|10}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
+
  |colspan="2"| Is shaking (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava))
 
  | false
 
  | false
 
  |-
 
  |-
  | {{change|10|11}}
+
  | {{Metadata id|}}
| VarInt
+
  | Boolean
|colspan="2"| Number of arrows in entity
+
  |colspan="2"| Has saddle
| 0
 
|- {{Added}}
 
| 12
 
| OptBlockPos
 
|colspan="2"| Unknown (Bed location?)
 
| Absent
 
|}
 
 
 
=== 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
 
|}
 
 
 
=== Raid Participent ===
 
 
 
{{change||Extends [[#Monster|Monster]].}}
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 14
 
  | boolean
 
  | colspan="2"| Is celebrating
 
 
  | false
 
  | false
 
  |}
 
  |}
  
"Is celebrating" appears to control the pose for vindicators and does not appear to be used by other types.
+
=== Hoglin ===
  
=== Abstract Illager ===
+
{{Metadata inherit|Hoglin|inherits=Animal|start_at=16}}
 
 
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"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|13|15}}
 
| 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}}
 
{| class="wikitable" {{added}}
Line 874: Line 290:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 15
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  | colspan="2"| Using crossbow
+
  |colspan="2"| Is immune to zombification
 
  | false
 
  | false
 
  |}
 
  |}
  
=== {{change|VindicationIllager|Vindicator}} ===
+
=== Zoglin ===
 
 
Extends [[#Abstract Illager|Abstract Illager]].
 
 
 
=== Ravager ===
 
 
 
Extends [[#Raid Participent|Raid Participent]]
 
  
No additional metadata.
+
{{Metadata inherit|Hoglin|inherits=Monster|start_at=15}}
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
! Status
 
!colspan="2"| Description
 
|-
 
| 4
 
|colspan="2"| Starts the attack animation.
 
|-
 
| 39
 
|colspan="2"| Starts the stun animation.
 
|}
 
 
=== Witch ===
 
 
Extends {{change|[[#Monster|Monster]]|[[#Raid Participent|Raid Participent]]}}.
 
 
{| class="wikitable"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 911: Line 306:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|12|15}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is drinking potion
+
  |colspan="2"| Is baby
 
  | false
 
  | false
 
  |}
 
  |}
  
=== AbstractSkeleton ===
+
=== Base Piglin ===
  
Extends [[#Monster|Monster]].
+
{{Metadata inherit|Base Piglin|inherits=Monster|start_at=15}}
  
{| class="wikitable" {{removed}}
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 927: Line 322:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|12|14}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is swinging arms
+
  |colspan="2"| Is immune to zombification
 
  | false
 
  | false
 
  |}
 
  |}
  
{{Change||Replaced with pose (presumably?)}}
+
=== Piglin ===
  
=== Zombie ===
+
{{Metadata inherit|Piglin|inherits=Base Piglin}}
  
Extends [[#Monster|Monster]].
+
{| class="wikitable" {{added}}
 
 
{| class="wikitable"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 945: Line 338:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|12|14}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
 
  |colspan="2"| Is baby
 
  |colspan="2"| Is baby
 
  | false
 
  | false
 
  |-
 
  |-
  | {{change|13|15}}
+
  | {{Metadata id|}}
| VarInt
 
|colspan="2"| Unused (previously type)
 
| 0
 
|- {{removed}}
 
| 14
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Are hands held up
+
  |colspan="2"| Is charging crossbow
 
  | false
 
  | false
 
  |-
 
  |-
  | {{change|15|16}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is becoming a drowned
+
  |colspan="2"| Is dancing
 
  | false
 
  | false
 
  |}
 
  |}
  
{{Change||Replaced with pose (presumably?)}}
+
=== Piglin Brute ===
  
=== Zombie Villager ===
+
{{Metadata inherit|Piglin Brute|inherits=Base Piglin}}
 
 
Extends [[#Zombie|Zombie]].
 
 
 
{| class="wikitable"
 
! 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}}
 
|}
 
  
 +
No additional metadata.
  
=== Ocelot ===
+
=== Wolf ===
  
Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
+
{{Metadata inherit|Wolf|inherits=TameableAnimal|start_at=18}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 999: Line 369:
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! 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
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Unknown
+
  |colspan="2"| Is begging
 
  | false
 
  | false
 
  |-
 
  |-
  | 20
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 
  | 14 (Red)
 
  | 14 (Red)
  |}
+
  |- {{Added}}
 
+
  | {{Metadata id|}}
=== Horse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
  | {{change|15|17}}
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Variant (Color & Style)
+
  |colspan="2"| Anger time
 
  | 0
 
  | 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)}}
+
=== {{Change|Zombie Pigman|Zombified Piglin}} ===
  
=== Trader Llama ===
+
{{Metadata inherit|{{Change|Zombie Pigman|Zombified Piglin}}|inherits=Zombie|start_at=18}}
 
 
Extends [[#Llama|Llama]].
 
  
 
No additional metadata.
 
No additional metadata.
  
=== Villager ===
+
== Block Actions ==
  
Extends [[#Ageable|Ageable]].
+
No changes so far.
  
{| class="wikitable"
+
== Inventories ==
! 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}}
 
|}
 
 
 
== Block Actions ==
 
  
 
No changes so far.
 
No changes so far.
Line 1,109: Line 402:
 
== 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 1,142: Line 408:
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Spawn Object ====
+
==== Chat Message (clientbound) ====  
 
 
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 ====
+
Identifying the difference between Chat/System Message is important as it helps respect the user's chat visibility options.  See [[Chat#Processing chat|processing chat]] for more info about these positions.
  
Sets the block entity associated with the block at the given location.
+
{{warning2|Game info accepts json formatting but does not display it, although the deprecated §-based formatting works.  This is not an issue when using the [[#Title|Title]] packet, so prefer that packet for displaying information in that slot.  See [https://bugs.mojang.com/browse/MC-119145 MC-119145] for more information.}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,216: Line 422:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x09
+
  |rowspan="3"| {{change|0x0F|0x0E}}
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
 
  |rowspan="3"| Client
 
  |rowspan="3"| Client
  | Location
+
  | JSON Data
 +
| [[Chat]]
 +
| Limited to 32767 bytes
 +
|-
 
  | Position
 
  | 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
 
  | Byte
  |
+
  | 0: chat (chat box), 1: system message (chat box), 2: game info (above hotbar).
  |-
+
  |- {{added}}
  | Number of slots?
+
  | Sender
  | VarInt
+
  | UUID
|
+
  | Used by the Notchian client for the disableChat launch option. Setting both longs to 0 will always display the message regardless of the setting.
|-
 
| Entity ID?
 
| Integer
 
  |
 
 
  |}
 
  |}
  
Line 1,303: Line 441:
 
{{Main|Chunk Format}}
 
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
{{See also|#Unload Chunk}}
 +
 +
{{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)}}
  
 
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).
 
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).
Line 1,314: Line 454:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x22|0x21}}
+
  |rowspan="11"| {{change|0x22|0x20}}
  |rowspan="9"| Play
+
  |rowspan="11"| Play
  |rowspan="9"| Client
+
  |rowspan="11"| Client
 
  | Chunk X
 
  | Chunk X
 
  | Int
 
  | Int
Line 1,332: Line 472:
 
  | VarInt
 
  | 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).
 
  | 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
 
  | Heightmaps
 
  | [[NBT]]
 
  | [[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).
+
  | 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 length
 +
| Optional VarInt
 +
| Size of the following array.  Not present if full chunk is false.
 +
|-
 +
| Biomes
 +
| Optional array of {{change|Integer|VarInt}}
 +
| {{change|1024 biome IDs, ordered by x then z then y, in 4&times;4&times;4 blocks.|Possibly something else.}}  Not present if full chunk is false.
 
  |-  
 
  |-  
 
  | Size
 
  | Size
Line 1,350: Line 498:
 
  |-
 
  |-
 
  | Block entities
 
  | Block entities
  | Array of [[NBT]]
+
  | 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.
 
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
  |}
 
  |}
  
===== Data structure =====
+
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||The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.}}
  
The data section of the packet contains most of the useful data for the chunk.
+
New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
  
{| class="wikitable"
+
<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
|-
+
<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
! 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 =====
+
==== Update Light ====
  
A Chunk Section is defined in terms of other [[data types]]. A Chunk Section consists of the following fields:
+
Updates light levels for a chunk.
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 +
!colspan="2"| Field Type
 +
! Notes
 +
|-
 +
|rowspan="11"| {{change|0x25|0x23}}
 +
|rowspan="11"| Play
 +
|rowspan="11"| Client
 +
|colspan="2"| Chunk X
 +
|colspan="2"| VarInt
 +
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  ! Field Name
+
  |colspan="2"| Chunk Z
  ! Field Type
+
  |colspan="2"| VarInt
  ! Notes
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |- {{added}}
 
  |- {{added}}
  | Block count
+
  |colspan="2"| Trust Edges
  | Short
+
  |colspan="2"| Boolean
  | 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).
+
  | If edges should be trusted for light updates.
 +
|
 +
  |-
 +
|colspan="2"| Sky Light Mask
 +
|colspan="2"| 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)
 
  |-
 
  |-
  | Bits Per Block
+
  |colspan="2"| Block Light Mask
  | Unsigned Byte
+
|colspan="2"| VarInt
  | Determines how many bits are used to encode a block. Note that not all numbers are valid here.
+
| Mask containing 18 bits, with the same order as sky light
 +
|-
 +
|colspan="2"| Empty Sky Light Mask
 +
|colspan="2"| 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.
 +
|-
 +
|colspan="2"| Empty Block Light Mask
 +
  |colspan="2"| 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.
 
  |-
 
  |-
  | Palette
+
  |rowspan="2"| Sky Light arrays
  | Varies
+
| Length
  | See below for the format.
+
|rowspan="2"| Array
 +
  | VarInt
 +
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | Data Array Length
+
  | Sky Light array
 +
| Array 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.
 +
|-
 +
|rowspan="2"| Block Light arrays
 +
| Length
 +
|rowspan="2"| Array
 
  | VarInt
 
  | VarInt
  | Number of longs in the following array
+
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | Data Array
+
  | Block Light array
  | Array of Long
+
  | Array of 2048 bytes
  | Compacted list of 4096 indices pointing to state IDs in the Palette
+
  | 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.
|- {{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''.}}
+
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.
  
 
==== Join Game ====
 
==== Join Game ====
Line 1,426: Line 590:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| 0x25
+
  |rowspan="17"| {{change|0x26|0x24}}
  |rowspan="8"| Play
+
  |rowspan="17"| Play
  |rowspan="8"| Client
+
  |rowspan="17"| Client
 
  | Entity ID
 
  | Entity ID
 
  | Int
 
  | Int
 
  | The player's Entity ID (EID)
 
  | The player's Entity ID (EID)
 +
|-
 +
| Is hardcore
 +
| Boolean
 +
|
 
  |-
 
  |-
 
  | Gamemode
 
  | Gamemode
 
  | Unsigned Byte
 
  | Unsigned Byte
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
+
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. {{change|Bit 3 (0x8) is the hardcore flag.}}
 +
|- {{Added}}
 +
| Previous Gamemode
 +
| Unsigned Byte
 +
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
 +
|- {{Added}}
 +
| World Count
 +
| VarInt
 +
| Size of the following array
 +
|- {{Added}}
 +
| World Names
 +
| Array of Identifier
 +
| Identifiers for all worlds on the server
 +
|- {{Added}}
 +
| Dimension Codec
 +
| [[NBT|NBT Tag Compound]]
 +
| The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
 
  |-
 
  |-
 
  | Dimension
 
  | Dimension
  | Int Enum
+
  | {{change|Int Enum|[[NBT|NBT Tag Compound]]}}
  | -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
+
  | {{change|-1: The Nether, 0: The Overworld, 1: The End|Valid dimensions are defined per dimension registry sent before this}}
  |- {{removed}}
+
  |- {{Added}}
  | Difficulty
+
  | World Name
  | Unsigned Byte
+
  | Identifier
  | 0: peaceful, 1: easy, 2: normal, 3: hard
+
  | Name of the world being spawned into
 +
|-
 +
| Hashed seed
 +
| Long
 +
| First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
 
  | Max Players
 
  | Max Players
  | Unsigned Byte
+
  | {{change|Unsigned Byte|VarInt}}
 
  | Was once used by the client to draw the player list, but now is ignored
 
  | Was once used by the client to draw the player list, but now is ignored
  |-
+
  |- {{Removed}}
 
  | Level Type
 
  | Level Type
 
  | String Enum (16)
 
  | String Enum (16)
  | default, flat, largeBiomes, amplified, default_1_1
+
  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
  |- {{added}}
+
  |-
 
  | View Distance
 
  | View Distance
 
  | VarInt
 
  | VarInt
  | Render distance (2-32)  
+
  | Render distance (2-32)
 
  |-
 
  |-
 
  | Reduced Debug Info
 
  | Reduced Debug Info
 
  | Boolean
 
  | 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.
 
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|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
 +
|- {{Added}}
 +
| Is Debug
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks
 +
|- {{Added}}
 +
| Is Flat
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63
 
  |}
 
  |}
  
==== Map Data ====
+
{{Need Info|Lay out and explain the format}}
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
'''[https://paste.gg/p/KennyTV/ad46ef552c6443cc808385f060564550 Default Vanilla Dimension/Biome Codec]'''
 +
 
 +
Known dimension attributes:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Packet ID
+
  ! Name
  ! State
+
  ! Type
  ! Bound To
+
  !style="width: 250px;" colspan="2"| Meaning
  !colspan="2"| Field Name
+
  ! Values
  !colspan="2"| Field Type
+
|-
  ! Notes
+
| name
 +
| String
 +
|colspan="2"| Dimension's name
 +
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
 +
|-
 +
| piglin_safe
 +
| Byte
 +
|colspan="2"| Whether piglins shake and transform to zombified piglins.
 +
| 1: true, 0: false
 +
|-
 +
| natural
 +
| Byte
 +
  |colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
 +
  | 1: true, 0: false
 
  |-
 
  |-
  |rowspan="17"| 0x26
+
  | ambient_light
|rowspan="17"| Play
+
  | Float
|rowspan="17"| Client
+
  |colspan="2"| How much light the dimension has.
  |colspan="2"| Map ID
+
  | 0.0 to 1.0
  |colspan="2"| VarInt
 
  | Map ID of the map being modified
 
 
  |-
 
  |-
  |colspan="2"| Scale
+
  | fixed_time
  |colspan="2"| Byte
+
| Long
| 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"| If this is set to a number, the time of the day is the specified value.
|-
+
  | false, or 0 to 24000
|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
+
  | infiniburn
  | Type
+
  | String
  |rowspan="6"| Array
+
  |colspan="2"| A resource location defining what block tag to use for infiniburn.
  | VarInt enum
+
  | "" or minecraft resource "minecraft:..."
| See below
 
 
  |-
 
  |-
  | X
+
  | respawn_anchor_works
 
  | Byte
 
  | Byte
  | Map coordinates: -128 for furthest left, +127 for furthest right
+
  |colspan="2"| Whether players can charge and use respawn anchors.
 +
| 1: true, 0: false
 
  |-
 
  |-
  | Z
+
  | has_skylight
 
  | Byte
 
  | Byte
  | Map coordinates: -128 for highest, +127 for lowest
+
  |colspan="2"| Whether the dimension has skylight access or not.
 +
| 1: true, 0: false
 
  |-
 
  |-
  | Direction
+
  | bed_works
 
  | Byte
 
  | Byte
  | 0-15
+
  |colspan="2"| Whether players can use a bed to sleep.
 +
| 1: true, 0: false
 
  |-
 
  |-
  | Has Display Name
+
  | effects
  | Boolean
+
  | String
  |
+
  |colspan="2"| ?
 +
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
 
  |-
 
  |-
  | Display Name
+
  | has_raids
  | Optional [[Chat]]
+
  | Byte
| Only present if previous Boolean is true
+
  |colspan="2"| Whether players with the Bad Omen effect can cause a raid.
|-
+
  | 1: true, 0: false
  |colspan="2"| Columns
 
  |colspan="2"| Byte
 
| Number of columns updated
 
 
  |-
 
  |-
  |colspan="2"| Rows
+
  | logical_height
  |colspan="2"| Optional Byte
+
| Int
  | Only if Columns is more than 0; number of rows updated
+
  |colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension.
 +
  | 0-256
 
  |-
 
  |-
  |colspan="2"| X
+
  | coordinate_scale
  |colspan="2"| Optional Byte
+
| Float
  | Only if Columns is more than 0; x offset of the westernmost column
+
  |colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 +
  | 1: true, 0: false
 
  |-
 
  |-
  |colspan="2"| Z
+
  | ultrawarm
  |colspan="2"| Optional Byte
+
| Byte
  | Only if Columns is more than 0; z offset of the northernmost row
+
  |colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
 +
  | 1: true, 0: false
 
  |-
 
  |-
  |colspan="2"| Length
+
  | has_ceiling
  |colspan="2"| Optional VarInt
+
  | Byte
| Only if Columns is more than 0; length of the following array
+
  |colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
|-
+
  | 1: true, 0: false
  |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).
+
==== Unlock Recipes ====
 
 
Types are based off of rows and columns in <code>map_icons.png</code>:
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  ! Icon type
+
  |rowspan="14"| {{Change|0x37|0x35}}
  ! Result
+
  |rowspan="14"| Play
 +
|rowspan="14"| Client
 
  |-
 
  |-
  | 0
+
  | Action
  | White arrow (players)
+
| VarInt
 +
  | 0: init, 1: add, 2: remove
 
  |-
 
  |-
  | 1
+
  | Crafting Recipe Book Open
  | Green arrow (item frames)
+
  | Boolean
 +
| If true, then the crafting recipe book will be open when the player opens its inventory.
 
  |-
 
  |-
  | 2
+
  | Crafting Recipe Book Filter Active
  | Red arrow
+
  | Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 
  |-
 
  |-
  | 3
+
  | Smelting Recipe Book Open
  | Blue arrow
+
  | Boolean
 +
| If true, then the smelting recipe book will be open when the player opens its inventory.
 
  |-
 
  |-
  | 4
+
  | Smelting Recipe Book Filter Active
  | White cross
+
  | Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 +
|- {{added}}
 +
| Blast Furance Recipe Book Open
 +
| Boolean
 +
| If true, then the blast furnace recipe book will be open when the player opens its inventory.
 +
|- {{added}}
 +
| Blast Furance Recipe Book Filter Active
 +
| Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 +
|- {{added}}
 +
| Smoker Recipe Book Open
 +
| Boolean
 +
| If true, then the smoker recipe book will be open when the player opens its inventory.
 +
|- {{added}}
 +
| Smoker Recipe Book Filter Active
 +
| Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 
  |-
 
  |-
  | 5
+
  | Array size 1
  | Red pointer
+
  | VarInt
 +
| Number of elements in the following array
 
  |-
 
  |-
  | 6
+
  | Recipe IDs
  | White circle (off-map players)
+
| Array of Identifier
 +
  |
 
  |-
 
  |-
  | 7
+
  | Array size 2
  | Small white circle (far-off-map players)
+
  | Optional VarInt
 +
| Number of elements in the following array, only present if mode is 0 (init)
 
  |-
 
  |-
  | 8
+
  | Recipe IDs
  | Mansion
+
  | Optional Array of Identifier, only present if mode is 0 (init)
  |-
+
  |
| 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
 
 
  |}
 
  |}
 +
Action:
 +
* 0 (init) = All the recipes in the list 2 will added to the recipe book. All the recipes in list 1 will be tagged as displayed, recipes that aren't tagged will be shown in the notification.
 +
* 1 (add) = All the recipes in the list are added and their icon will be shown in the notification.
 +
* 2 (remove) = Remove all the recipes in the list. This allows them to re-displayed when they are readded.
  
==== Open Book ====
+
==== Respawn ====
  
Sent when a player right clicks with a signed book. This tells the client to open the book GUI.
+
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" {{Added}}
+
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,651: Line 833:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| 0x2D
+
  |rowspan="10"| {{Change|0x3B|0x39}}
  |rowspan="1"| Play
+
  |rowspan="10"| Play
  |rowspan="1"| Client
+
  |rowspan="10"| Client
  | Hand
+
  | Dimension
  | VarInt enum
+
  | {{change|Int Enum|[[NBT|NBT Tag Compound]]}}
  | 0: Main hand, 1: Off hand
+
  | {{change|-1: The Nether, 0: The Overworld, 1: The End|Valid dimensions are defined per dimension registry sent in [[#Join Game|Join Game]]}}
 +
|- {{Added}}
 +
| World Name
 +
| Identifier
 +
| Name of the world being spawned into
 +
|-
 +
| Hashed seed
 +
| Long
 +
| First 8 bytes of the SHA-256 hash of the world's seed.
 +
|- {{Added}}
 +
| Gamemode
 +
| Unsigned Byte
 +
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
 +
|- {{Added}}
 +
| Previous Gamemode
 +
| Unsigned Byte
 +
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
 +
|- {{Removed}}
 +
| Level Type
 +
| String (16)
 +
| Same as [[#Join Game|Join Game]]
 +
|- {{Added}}
 +
| Is Debug
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks
 +
|- {{Added}}
 +
| Is Flat
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63
 +
|- {{added}}
 +
| Copy metadata
 +
| Boolean
 +
| If false, metadata is reset on the respawned player entity.  Set to true for dimension changes (including the dimension change triggered by sending client status perform respawn to exit the end poem/credits), and false for normal respawns.
 
  |}
 
  |}
  
==== Use Bed ====
+
{{Need Info|Does the new World Name field resolve this same-dimension issue?}}
  
{{change|This packet tells that a player goes to bed.}}
+
{{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).
  
{{change|The client with the matching Entity ID will go into bed mode.}}
+
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|This Packet is sent to all nearby players including the one sent to bed.}}
+
==== Multi Block Change ====
  
{{change|Any packets sent with a location not currently occupied by a bed will be ignored by clients.}}
+
{| class="wikitable" {{added}}
 
 
{| class="wikitable" {{removed}}
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,677: Line 889:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x33
+
  |rowspan="4"| {{Change|0x10|0x3B}}
  |rowspan="2"| Play
+
  |rowspan="4"| Play
  |rowspan="2"| Client
+
  |rowspan="4"| Client
  | Entity ID
+
  |
 +
| Long
 +
| Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right)
 +
|- {{added}}
 +
|
 +
| Boolean
 +
| Always inverse the preceding Update Light packet's "Trust Edges" bool
 +
|
 +
|-
 +
| Array size
 
  | VarInt
 
  | VarInt
  | Sleeping player's EID
+
  | Number of elements in the following array
 
  |-
 
  |-
  | Location
+
  |  
  | Position
+
  | Array of VarLong
  | Block location of the head part of the bed
+
  | Each entry is composed of the block id, shifted right by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).
 
  |}
 
  |}
  
==== Respawn ====
+
==== Entity Properties ====
  
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.
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,697: Line 918:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x3A
+
  |rowspan="6"| {{change|0x59|0x58}}
  |rowspan="4"| Play
+
  |rowspan="6"| Play
  |rowspan="4"| Client
+
  |rowspan="6"| Client
  | Dimension
+
  |colspan="2"| Entity ID
  | Int Enum
+
  |colspan="2"| VarInt
  | -1: The Nether, 0: The Overworld, 1: The End
+
|
  |- {{removed}}
+
|-
  | Difficulty
+
|colspan="2"| Number Of Properties
  | Unsigned Byte
+
|colspan="2"| Int
  | 0: Peaceful, 1: Easy, 2: Normal, 3: Hard
+
| Number of elements in the following array
 +
  |-
 +
  |rowspan="4"| Property
 +
| Key
 +
|rowspan="4"| Array
 +
| {{Change|String (64)|Identifier}}
 +
  | See below
 +
  |-
 +
  | Value
 +
| Double
 +
| See below
 
  |-
 
  |-
  | Gamemode
+
  | Number Of Modifiers
  | Unsigned Byte
+
  | VarInt
  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
+
  | Number of elements in the following array
 
  |-
 
  |-
  | Level Type
+
  | Modifiers
  | String (16)
+
  | Array of Modifier Data
  | Same as [[#Join Game|Join Game]]
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
{{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).
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
  
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.}}
+
{| class="wikitable"
 +
|-
 +
! Key
 +
! Default
 +
! Min
 +
! Max
 +
! Label
 +
|-
 +
| {{change|generic.maxHealth|generic.max_health}}
 +
| 20.0
 +
| 0.0
 +
| 1024.0
 +
| Max Health
 +
|-
 +
| {{change|generic.followRange|generic.follow_range}}
 +
| 32.0
 +
| 0.0
 +
| 2048.0
 +
| Follow Range
 +
|-
 +
| {{change|generic.knockbackResistance|generic.knockback_resistance}}
 +
| 0.0
 +
| 0.0
 +
| 1.0
 +
| Knockback Resistance
 +
|-
 +
| {{change|generic.movementSpeed|generic.movement_speed}}
 +
| 0.7
 +
| 0.0
 +
| 1024.0
 +
| Movement Speed
 +
|-
 +
| {{change|generic.attackDamage|generic.attack_damage}}
 +
| 2.0
 +
| 0.0
 +
| 2048.0
 +
| Attack Damage
 +
|-
 +
| {{change|generic.attackSpeed|generic.attack_speed}}
 +
| 4.0
 +
| 0.0
 +
| 1024.0
 +
| Attack Speed
 +
|-
 +
| {{change|generic.flyingSpeed|generic.flying_speed}}
 +
| 0.4
 +
| 0.0
 +
| 1024.0
 +
| Flying Speed
 +
|-
 +
| generic.armor
 +
| 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor
 +
|-
 +
| {{change|generic.armorToughness|generic.armor_toughness}}
 +
| 0.0
 +
| 0.0
 +
| 20.0
 +
| Armor Toughness
 +
|-
 +
| {{change|generic.attackKnockback|generic.attack_knockback}}
 +
| 0.0
 +
| 0.0
 +
| 5.0
 +
| &mdash;
 +
|-
 +
| generic.luck
 +
| 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck
 +
|-
 +
| {{change|horse.jumpStrength|horse.jump_strength}}
 +
| 0.7
 +
| 0.0
 +
| 2.0
 +
| Jump Strength
 +
|-
 +
| {{change|zombie.spawnReinforcements|zombie.spawn_reinforcements}}
 +
| 0.0
 +
| 0.0
 +
| 1.0
 +
| Spawn Reinforcements Chance
 +
|-
 +
| generic.reachDistance
 +
| 5.0
 +
| 0.0
 +
| 1024.0
 +
| Player Reach Distance (Forge only)
 +
|-
 +
| forge.swimSpeed
 +
| 1.0
 +
| 0.0
 +
| 1024.0
 +
| Swimming Speed (Forge only)
 +
|}
  
==== Entity Sound Effect ====
+
Unknown attributes will cause a game crash ([https://bugs.mojang.com/browse/MC-150405 MC-150405]) due to the default minimum being larger than the default value.
  
Plays a sound effect from an entity.
+
''Modifier Data'' structure:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Packet ID
+
  |-
! State
 
! Bound To
 
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| 0x50
+
  | UUID
|rowspan="5"| Play
+
  | UUID
|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
+
  | Amount
  | VarInt Enum
+
  | Double
  | The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
+
  | May be positive or negative
 
  |-
 
  |-
  | Entity ID
+
  | Operation
  | VarInt
+
  | Byte
  |
+
  | See below
|-
 
| 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
 
 
  |}
 
  |}
 +
 +
The operation controls how the base value of the modifier is changed.
 +
 +
* 0: Add/subtract amount
 +
* 1: Add/subtract amount percent of the current value
 +
* 2: Multiply by amount percent
 +
 +
All of the 0's are applied first, and then the 1's, and then the 2's.
  
 
==== Declare Recipes ====
 
==== Declare Recipes ====
Line 1,771: Line 1,094:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x54|0x5A}}
+
  |rowspan="4"| {{change|0x5B|0x5A}}
  |rowspan="5"| Play
+
  |rowspan="4"| Play
  |rowspan="5"| Client
+
  |rowspan="4"| Client
 
  |colspan="2"| Num Recipes
 
  |colspan="2"| Num Recipes
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
 
  | Number of elements in the following array
 
  | Number of elements in the following array
 
  |-
 
  |-
  |rowspan="4"| Recipe
+
  |rowspan="3"| Recipe
|{{removed}}| Recipe ID
 
|rowspan="4"| Array
 
|{{removed}}| Identifier
 
|{{removed}}|
 
|-
 
| Type
 
| {{Change|String|Identifier}}
 
| The recipe serializer, see below
 
|- {{Added}}
 
 
  | Recipe ID
 
  | Recipe ID
 +
|rowspan="3"| Array
 
  | Identifier
 
  | Identifier
 
  |
 
  |
 +
|-
 +
| Type
 +
| String
 +
| The recipe type, see below
 
  |-
 
  |-
 
  | Data
 
  | Data
Line 1,797: Line 1,116:
 
  |}
 
  |}
  
Recipe serializers:
+
Recipe types:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Serializer
+
  ! Type
 
  ! Description
 
  ! Description
 
  ! Data
 
  ! Data
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_shapeless</code>
+
  | <code>crafting_shapeless</code>
 
  | Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 
  | Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 
  | As follows:
 
  | As follows:
Line 1,829: Line 1,148:
 
     |}
 
     |}
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_shaped</code>
+
  | <code>crafting_shaped</code>
 
  | Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 
  | Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 
  | As follows:
 
  | As follows:
Line 1,858: Line 1,177:
 
     |}
 
     |}
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_armordye</code>
+
  | <code>crafting_special_armordye</code>
 
  | Recipe for dying leather armor
 
  | Recipe for dying leather armor
  | None
+
  |rowspan="13"| None
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_bookcloning</code>
+
  | <code>crafting_special_bookcloning</code>
 
  | Recipe for copying contents of written books
 
  | Recipe for copying contents of written books
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_mapcloning</code>
+
  | <code>crafting_special_mapcloning</code>
 
  | Recipe for copying maps
 
  | Recipe for copying maps
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_mapextending</code>
+
  | <code>crafting_special_mapextending</code>
 
  | Recipe for adding paper to maps
 
  | Recipe for adding paper to maps
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_firework_rocket</code>
+
  | <code>crafting_special_firework_rocket</code>
 
  | Recipe for making firework rockets
 
  | Recipe for making firework rockets
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_firework_star</code>
+
  | <code>crafting_special_firework_star</code>
 
  | Recipe for making firework stars
 
  | Recipe for making firework stars
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_firework_star_fade</code>
+
  | <code>crafting_special_firework_star_fade</code>
 
  | Recipe for making firework stars fade between multiple colors
 
  | Recipe for making firework stars fade between multiple colors
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_repairitem</code>
+
  | <code>crafting_special_repairitem</code>
 
  | Recipe for repairing items via crafting
 
  | Recipe for repairing items via crafting
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_tippedarrow</code>
+
  | <code>crafting_special_tippedarrow</code>
 
  | Recipe for crafting tipped arrows
 
  | Recipe for crafting tipped arrows
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_bannerduplicate</code>
+
  | <code>crafting_special_bannerduplicate</code>
 
  | Recipe for copying banner patterns
 
  | Recipe for copying banner patterns
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_banneraddpattern</code>
+
  | <code>crafting_special_banneraddpattern</code>
 
  | Recipe for adding patterns to banners
 
  | Recipe for adding patterns to banners
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_shielddecoration</code>
+
  | <code>crafting_special_shielddecoration</code>
 
  | Recipe for applying a banner's pattern to a shield
 
  | Recipe for applying a banner's pattern to a shield
| None
 
 
  |-
 
  |-
  | <code>{{change||minecraft:}}crafting_special_shulkerboxcoloring</code>
+
  | <code>crafting_special_shulkerboxcoloring</code>
 
  | Recipe for recoloring a shulker box
 
  | 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>
+
  | <code>smelting</code>
 
  | Smelting recipe
 
  | Smelting recipe
  |rowspan="4"| All of these have the same format, as follows:
+
  |rowspan="4"| As follows:
 
   {| class="wikitable"
 
   {| class="wikitable"
 
     ! Name
 
     ! Name
Line 1,940: Line 1,243:
 
     | Cooking time
 
     | Cooking time
 
     | VarInt
 
     | VarInt
 +
    |
 +
    |}
 +
|-
 +
| <code>blasting</code>
 +
| Blast furnace recipe
 +
|-
 +
| <code>smoking</code>
 +
| Smoker recipe
 +
|-
 +
| <code>campfire_cooking</code>
 +
| Campfire recipe
 +
|-
 +
| <code>stonecutting</code>
 +
| Stonecutter recipe
 +
| 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
 +
    | Ingredient
 +
    |
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 
     |
 
     |
 
     |}
 
     |}
 
  |- {{Added}}
 
  |- {{Added}}
  | <code>minecraft:blasting</code>
+
  | <code>smithing</code>
  | Recipes in a blast furnace.
+
  | Smithing table recipe
  |- {{Added}}
+
  | As follows:
| <code>minecraft:smoking</code>
+
  {| class="wikitable"
| Recipes in a smoker.
+
    ! Name
|- {{Added}}
+
    ! Type
| <code>minecraft:campfire_cooking</code>
+
    ! Description
| Recipes in a campfire.
+
    |-
 +
    | Base
 +
    | Ingredient
 +
    | First item
 +
    |-
 +
    | Addition
 +
    | Ingredient
 +
    | Second item
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 
  |}
 
  |}
  
Line 1,969: Line 1,314:
 
  |}
 
  |}
  
==== Tags ====
+
=== Serverbound ===
  
{| class="wikitable"
+
==== Interact Entity ====
! 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 ====
+
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
  
Updates light levels for a chunk.
+
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
  
{| class="wikitable"
+
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
! 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"
 
{| class="wikitable"
Line 2,061: Line 1,332:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{change|0x14|0x2E}}
+
  |rowspan="7"| 0x0E
  |rowspan="5"| Play
+
  |rowspan="7"| Play
  |rowspan="5"| Client
+
  |rowspan="7"| Server
| 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
 
  | Entity ID
  | Optional Int
+
  | VarInt
  | EntityHorse's EID. Only sent when Window Type is “EntityHorse”
+
  | The ID of the entity to interact
|}
 
 
 
==== 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
+
  | Type
  |rowspan="16"| Play
+
  | VarInt Enum
  |rowspan="16"| Client
+
  | 0: interact, 1: attack, 2: interact at
 
  |-
 
  |-
  | colspan="2" | Window ID
+
  | Target X
  | colspan="2" | VarInt
+
  | Optional Float
  | The ID of the window that is open; this is an int rather than a byte.
+
  | Only if Type is interact at
 
  |-
 
  |-
  | colspan="2" | Size
+
  | Target Y
  | colspan="2" | Byte
+
  | Optional Float
  | The number of trades in the following array
+
  | Only if Type is interact at
 
  |-
 
  |-
  | rowspan="10" | Trades
+
  | Target Z
| Input item 1
+
  | Optional Float
| rowspan="10" | Array
+
  | Only if Type is interact at
  | [[Slot]]
 
  | The first item the villager is buying
 
 
  |-
 
  |-
  | Output item
+
  | Hand
| [[Slot]]
+
  | Optional VarInt Enum
| The item the villager is selling
+
  | Only if Type is interact or interact at; 0: main hand, 1: off hand
|-
+
  |- {{Added}}
| Has second item
+
  | Sneaking
| 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
 
  | Boolean
  | True if the trade is disabled; false if the trade is enabled.
+
  | If the client is sneaking.
|-
 
| 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 ====
+
==== Generate Structure ====
  
{{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.}}
+
Sent when Generate is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
 
 
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}}
 
{| class="wikitable" {{added}}
Line 2,181: Line 1,376:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x40
+
  |rowspan="3"| 0x0F
  |rowspan="2"| Play
+
  |rowspan="3"| Play
  |rowspan="2"| Client
+
  |rowspan="3"| Server
  | Chunk X
+
  | Location
  | VarInt
+
  | Position
  | Chunk X coordinate of the player's position
+
  | Block entity location
 
  |-
 
  |-
  | Chunk Z
+
  | Levels
 
  | VarInt
 
  | VarInt
  | Chunk Z coordinate of the player's position
+
  | Value of the levels slider/max depth to generate
|}
 
 
 
==== 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
+
  | Keep Jigsaws
|rowspan="1"| Play
+
  | Boolean
|rowspan="1"| Client
+
  |
| View Distance
 
  | VarInt
 
  | Render distance (2-32)
 
 
  |}
 
  |}
  
=== Serverbound ===
+
==== Player Abilities (serverbound) ====
  
==== Set Difficulty ====
+
{{change|The latter 2 fields are used to indicate the walking and flying speeds respectively, while the first field is used to determine the value of 4 booleans.}}
  
Must have at least op level 2 to use. Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
+
The vanilla client sends this packet when the player starts/stops flying with the Flags parameter changed accordingly. {{change|All other parameters are ignored by the vanilla server.}}
  
{| class="wikitable" {{added}}
+
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 2,227: Line 1,406:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| 0x02
+
  |rowspan="3"| {{change|0x19|0x1A}}
  |rowspan="1"| Play
+
  |rowspan="3"| Play
  |rowspan="1"| Server
+
  |rowspan="3"| Server
  | New difficulty
+
  | Flags
 
  | Byte
 
  | Byte
  | 0: peaceful, 1: easy, 2: normal, 3: hard
+
  | Bit mask. {{change|0x08: damage disabled (god mode), 0x04: can fly, }}0x02: is flying{{change|, 0x01: is Creative}}
 +
|- {{removed}}
 +
| Flying Speed
 +
| Float
 +
|
 +
|- {{removed}}
 +
| Walking Speed
 +
| Float
 +
|
 
  |}
 
  |}
  
==== Lock Difficulty ====
+
==== Set Displayed Recipe ====
  
Must have at least op level 2 to use.  Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
+
Replaces Recipe Book Data, type 0.
  
{| class="wikitable" {{added}}
+
{| class="wikitable" {{Added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 2,247: Line 1,434:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| 0x0F
+
  |rowspan="1"| 0x1E
 
  |rowspan="1"| Play
 
  |rowspan="1"| Play
 
  |rowspan="1"| Server
 
  |rowspan="1"| Server
  | Locked
+
  | Recipe ID
  | Boolean
+
  | Identifier
 
  |
 
  |
 
  |}
 
  |}
  
==== Recipe Book Data ====
+
==== Set Recipe Book State ====
  
{| class="wikitable"
+
Replaces Recipe Book Data, type 1.
 +
 
 +
{| class="wikitable" {{Added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="11"| {{change|0x1B|0x1D}}
+
  |rowspan="3"| 0x1F
  |rowspan="11"| Play
+
  |rowspan="3"| Play
  |rowspan="11"| Server
+
  |rowspan="3"| Server
  |colspan="2"| Type
+
  | Book ID
  | VarInt
+
  | VarInt enum
  | Determines the format of the rest of the packet
+
  | 0: crafting, 1: furnace, 2: blast furnace, 3: smoker
 
  |-
 
  |-
! Type
+
  | Book Open
! Field Name
 
!
 
!
 
  |-
 
| 0: Displayed Recipe
 
| Recipe ID
 
| Identifier
 
| A recipe ID
 
|-
 
|rowspan="8"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
 
  | Boolean
 
  | Boolean
  | Whether the player has the crafting recipe book currently opened/active.
+
  |
 
  |-
 
  |-
  | Crafting Recipe Filter Active
+
  | 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
 
  | Boolean
 
  |
 
  |
 
  |}
 
  |}
 
The Recipe Book Status type is sent when one of the states changes.
 
  
 
==== Update Jigsaw Block ====
 
==== Update Jigsaw Block ====
Line 2,322: Line 1,474:
 
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
 
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
  
{| class="wikitable" {{added}}
+
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 2,330: Line 1,482:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x27
+
  |rowspan="7"| {{Change|0x27|0x28}}
  |rowspan="4"| Play
+
  |rowspan="7"| Play
  |rowspan="4"| Server
+
  |rowspan="7"| Server
 
  | Location
 
  | Location
 
  | Position
 
  | Position
 
  | Block entity location
 
  | Block entity location
  |-
+
  |- {{Removed}}
 
  | Attachment type
 
  | Attachment type
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Name
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Target
 
  | Identifier
 
  | Identifier
 
  |  
 
  |  
 
  |-  
 
  |-  
  | Target pool
+
  | {{Change|Target pool|Pool}}
 
  | Identifier
 
  | Identifier
 
  |  
 
  |  
Line 2,348: Line 1,508:
 
  | String
 
  | String
 
  | "Turns into" on the GUI, <code>final_state</code> in NBT
 
  | "Turns into" on the GUI, <code>final_state</code> in NBT
 +
|- {{Added}}
 +
| Joint type
 +
| String
 +
| <code>rollable</code> if the attached piece can be rotated, else <code>aligned</code>
 
  |}
 
  |}
  
==== Player Block Placement ====
+
==== Entity Equipment ====
  
 
{| class="wikitable"
 
{| class="wikitable"
|-
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{change|0x29|0x2C}}
+
  |rowspan="5"| 0x47
  |rowspan="9"| Play
+
|rowspan="5"| Play
  |rowspan="9"| Server
+
  |rowspan="5"| Client
  |{{removed}}| Location
+
  |colspan="2"| Entity ID
  |{{removed}}| Position
+
  |colspan="2"| VarInt
  |{{removed}}| Block position
+
| Entity's EID
  |- {{removed}}
+
  |- {{Removed}}
  | Face
+
|colspan="2"| Slot
  | VarInt Enum
+
  |colspan="2"| VarInt Enum
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
+
| Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
 +
  |- {{Removed}}
 +
  |colspan="2"| Item
 +
  |colspan="2"| [[Slot Data|Slot]]
 +
|
 
  |-
 
  |-
  | Hand
+
  |rowspan="2"| Equipment
  | VarInt Enum
+
| Slot
  | The hand from which the block is placed; 0: main hand, 1: off hand
+
  |rowspan="2"| Array
|- {{added}}
+
| Byte Enum
| Location
+
  | Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet). Also has the top bit set if another entry follows, and otherwise unset if this is the last item in the array.
| 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
+
  | Item
  | Float
+
  | [[Slot Data|Slot]]
| 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 ==
 
== Handshaking ==
Line 2,432: Line 1,575:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|404|476}})
+
  | See [[protocol version numbers]] (currently {{change|578|753}})
 
  |-
 
  |-
 
  | Server Address
 
  | Server Address
 
  | String
 
  | 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.
+
  | 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
 
  | Server Port
Line 2,461: Line 1,604:
 
=== Clientbound ===
 
=== Clientbound ===
  
No changes so far.
+
==== Login Success ====
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="2"| 0x02
 +
|rowspan="2"| Login
 +
|rowspan="2"| Client
 +
| UUID
 +
| {{Change|String (36)|UUID}}
 +
| {{Change|Unlike in other packets, this field contains the UUID as a string with hyphens}}.
 +
|-
 +
| Username
 +
| String (16)
 +
|
 +
|}
 +
 
 +
This packet switches the connection state to [[#Play|play]].
  
 
=== Serverbound ===
 
=== Serverbound ===

Latest revision as of 17:11, 10 September 2020

This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 1.16.3, protocol 753). 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

The UUID type is now also sometimes encoded by the Notchian server as an array of four 32-bit integers, from most significant to least significant (matching the new format used on entity NBT). This representation is identical to using 16 bytes, two 64-bit integers, or one 128-bit integers.

Packets

ID Packet name Documentation
Handshaking serverbound
0x00 Handshake Current Pre
Play clientbound
0x02 Spawn Weather Entity Current
0x03 0x02 Spawn Living Entity Current (unchanged)
0x04 0x03 Spawn Painting Current (unchanged)
0x05 0x04 Spawn Player Current (unchanged)
0x06 0x05 Entity Animation (clientbound) Current (unchanged)
0x07 0x06 Statistics Current (unchanged)
0x08 0x07 Acknowledge Player Digging Current (unchanged)
0x09 0x08 Block Break Animation Current (unchanged)
0x0A 0x09 Block Entity Data Current (unchanged)
0x0B 0x0A Block Action Current (unchanged)
0x0C 0x0B Block Change Current (unchanged)
0x0D 0x0C Boss Bar Current (unchanged)
0x0E 0x0D Server Difficulty Current (unchanged)
0x0F 0x0E Chat Message (clientbound) Current Pre
0x11 0x0F Tab-Complete (clientbound) Current (unchanged)
0x12 0x10 Declare Commands Current (unchanged)
0x13 0x11 Window Confirmation (clientbound) Current (unchanged)
0x14 0x12 Close Window (clientbound) Current (unchanged)
0x15 0x13 Window Items Current (unchanged)
0x16 0x14 Window Property Current (unchanged)
0x17 0x15 Set Slot Current (unchanged)
0x18 0x16 Set Cooldown Current (unchanged)
0x19 0x17 Plugin Message (clientbound) Current (unchanged)
0x1A 0x18 Named Sound Effect Current (unchanged)
0x1B 0x19 Disconnect (play) Current (unchanged)
0x1C 0x1A Entity Status Current (unchanged)
0x1D 0x1B Explosion Current (unchanged)
0x1E 0x1C Unload Chunk Current (unchanged)
0x1F 0x1D Change Game State Current (unchanged)
0x20 0x1E Open Horse Window Current (unchanged)
0x21 0x1F Keep Alive (clientbound) Current (unchanged)
0x22 0x20 Chunk Data Current Pre
0x23 0x21 Effect Current (unchanged)
0x24 0x22 Particle Current (unchanged)
0x25 0x23 Update Light Current Pre
0x26 0x24 Join Game Current Pre
0x27 0x25 Map Data Current (unchanged)
0x28 0x26 Trade List Current (unchanged)
0x29 0x27 Entity Position Current (unchanged)
0x2A 0x28 Entity Position and Rotation Current (unchanged)
0x2B 0x29 Entity Rotation Current (unchanged)
0x2C 0x2A Entity Movement Current (unchanged)
0x2D 0x2B Vehicle Move (clientbound) Current (unchanged)
0x2E 0x2C Open Book Current (unchanged)
0x2F 0x2D Open Window Current (unchanged)
0x30 0x2E Open Sign Editor Current (unchanged)
0x31 0x2F Craft Recipe Response Current (unchanged)
0x32 0x30 Player Abilities (clientbound) Current (unchanged)
0x33 0x31 Combat Event Current (unchanged)
0x34 0x32 Player Info Current (unchanged)
0x35 0x33 Face Player Current (unchanged)
0x36 0x34 Player Position And Look (clientbound) Current (unchanged)
0x37 0x35 Unlock Recipes Current Pre
0x38 0x36 Destroy Entities Current (unchanged)
0x39 0x37 Remove Entity Effect Current (unchanged)
0x3A 0x38 Resource Pack Send Current (unchanged)
0x3B 0x39 Respawn Current Pre
0x3C 0x3A Entity Head Look Current (unchanged)
0x10 0x3B Multi Block Change Current Pre
0x3D 0x3C Select Advancement Tab Current (unchanged)
0x3E 0x3D World Border Current (unchanged)
0x3F 0x3E Camera Current (unchanged)
0x40 0x3F Held Item Change (clientbound) Current (unchanged)
0x41 0x40 Update View Position Current (unchanged)
0x42 0x41 Update View Distance Current (unchanged)
0x47 Entity Equipment Current Pre
0x4E 0x42 Spawn Position Current (unchanged)
0x4F 0x4E Time Update Current (unchanged)
0x50 0x4F Title Current (unchanged)
0x51 0x50 Entity Sound Effect Current (unchanged)
0x52 0x51 Sound Effect Current (unchanged)
0x53 0x52 Stop Sound Current (unchanged)
0x54 0x53 Player List Header And Footer Current (unchanged)
0x55 0x54 NBT Query Response Current (unchanged)
0x56 0x55 Collect Item Current (unchanged)
0x57 0x56 Entity Teleport Current (unchanged)
0x58 0x57 Advancements Current (unchanged)
0x59 0x58 Entity Properties Current Pre
0x5A 0x59 Entity Effect Current (unchanged)
0x5B 0x5A Declare Recipes Current Pre
0x5C 0x5B Tags Current (unchanged)
Play serverbound
0x0E Interact Entity Current Pre
0x0F Generate Structure Pre
0x0F 0x10 Keep Alive (serverbound) Current (unchanged)
0x10 0x11 Lock Difficulty Current (unchanged)
0x11 0x12 Player Position Current (unchanged)
0x12 0x13 Player Position And Rotation (serverbound) Current (unchanged)
0x13 0x14 Player Rotation Current (unchanged)
0x14 0x15 Player Movement Current (unchanged)
0x15 0x16 Vehicle Move (serverbound) Current (unchanged)
0x16 0x17 Steer Boat Current (unchanged)
0x17 0x18 Pick Item Current (unchanged)
0x18 0x19 Craft Recipe Request Current (unchanged)
0x19 0x1A Player Abilities (serverbound) Current Pre
0x1A 0x1B Player Digging Current (unchanged)
0x1B 0x1C Entity Action Current (unchanged)
0x1C 0x1D Steer Vehicle Current (unchanged)
0x1D Recipe Book Data Current
0x1E Set Displayed Recipe Pre
0x1F Set Recipe Book State Pre
0x1E 0x20 Name Item Current (unchanged)
0x1F 0x21 Resource Pack Status Current (unchanged)
0x20 0x22 Advancement Tab Current (unchanged)
0x21 0x23 Select Trade Current (unchanged)
0x22 0x24 Set Beacon Effect Current (unchanged)
0x23 0x25 Held Item Change (serverbound) Current (unchanged)
0x24 0x26 Update Command Block Current (unchanged)
0x25 0x27 Update Command Block Minecart Current (unchanged)
0x26 0x28 Creative Inventory Action Current (unchanged)
0x27 0x29 Update Jigsaw Block Current Pre
0x28 0x2A Update Structure Block Current (unchanged)
0x29 0x2B Update Sign Current (unchanged)
0x2A 0x2C Animation (serverbound) Current (unchanged)
0x2B 0x2D Spectate Current (unchanged)
0x2C 0x2E Player Block Placement Current (unchanged)
0x2D 0x2F Use Item Current (unchanged)
Login clientbound
0x02 Login Success Current Pre

New/modified data types

No changes so far.

Entity Metadata

FishingHook

Extends Entity.

Index Type Meaning Default
7 VarInt Hooked entity id + 1, or 0 if there is no hooked entity 0
8 Boolean Is catchable False

Abstract Arrow

Extends Entity.

Abstract base class for Tipped Arrow (which is used for regular arrows as well as tipped ones) and Spectral Arrow.

Index Type Meaning Default
7 Byte Bit mask Meaning 0
0x01 Is critical
0x02 Is noclip (used by loyalty tridents when returning)
8 OptUUID Unused Empty
9 8 Byte Peircing level 0

Tipped Arrow

Extends Abstract Arrow.

Used for both tipped and regular arrows. If not tipped, then color is set to -1 and no tipped arrow particles are used.

Index Type Meaning Default
10 9 VarInt Color (-1 for no particles) -1

Spectral Arrow

Extends Abstract Arrow.

No additional metadata.

Trident

Extends Abstract Arrow.

Index Type Meaning Default
10 9 VarInt Loyalty level (enchantment) 0
11 10 Boolean Has enchantment glint False

Strider

Extends Animal.

Index Type Meaning Default
16 VarInt Total time to "boost" with warped fungus on a stick for 0
17 Boolean Is shaking (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava)) false
18 Boolean Has saddle false

Hoglin

Extends Animal.

Index Type Meaning Default
16 Boolean Is immune to zombification false

Zoglin

Extends Monster.

Index Type Meaning Default
15 Boolean Is baby false

Base Piglin

Extends Monster.

Index Type Meaning Default
15 Boolean Is immune to zombification false

Piglin

Extends Base Piglin.

Index Type Meaning Default
16 Boolean Is baby false
17 Boolean Is charging crossbow false
18 Boolean Is dancing false

Piglin Brute

Extends Base Piglin.

No additional metadata.

Wolf

Extends TameableAnimal.

Index Type Meaning Default
18 Boolean Is begging false
19 VarInt Collar color (values are those used with dyes) 14 (Red)
20 VarInt Anger time 0

Zombie Pigman Zombified Piglin

Extends Zombie.

No additional metadata.

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Chat Message (clientbound)

Identifying the difference between Chat/System Message is important as it helps respect the user's chat visibility options. See processing chat for more info about these positions.

Warning.png Game info accepts json formatting but does not display it, although the deprecated §-based formatting works. This is not an issue when using the Title packet, so prefer that packet for displaying information in that slot. See MC-119145 for more information.

Packet ID State Bound To Field Name Field Type Notes
0x0F 0x0E Play Client JSON Data Chat Limited to 32767 bytes
Position Byte 0: chat (chat box), 1: system message (chat box), 2: game info (above hotbar).
Sender UUID Used by the Notchian client for the disableChat launch option. Setting both longs to 0 will always display the message regardless of the setting.

Chunk Data

Main article: Chunk Format
See also: #Unload Chunk
Huh.png 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
0x22 0x20 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 length Optional VarInt Size of the following array. Not present if full chunk is false.
Biomes Optional array of Integer VarInt 1024 biome IDs, ordered by x then z then y, in 4×4×4 blocks. Possibly something else. 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.

The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.

New format, 5 bits per block, containing the following references to blocks in a palette (not shown): 122344566480743131516914101202

0020863148418841 0000000000100000100001100011000101001000010000011000100001000001
01018A7260F68C87 0000000100000001100010100111001001100000111101101000110010000111

Update Light

Updates light levels for a chunk.

Packet ID State Bound To Field Name Field Type Notes
0x25 0x23 Play 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)
Trust Edges Boolean If edges should be trusted for light updates.
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 Length Array VarInt Length of the following array in bytes (always 2048)
Sky Light array Array 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 Length Array VarInt Length of the following array in bytes (always 2048)
Block Light array Array 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.

Join Game

See Protocol Encryption for information on logging in.

Packet ID State Bound To Field Name Field Type Notes
0x26 0x24 Play Client Entity ID Int The player's Entity ID (EID)
Is hardcore Boolean
Gamemode Unsigned Byte 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
Previous Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
World Count VarInt Size of the following array
World Names Array of Identifier Identifiers for all worlds on the server
Dimension Codec NBT Tag Compound The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
Dimension Int Enum NBT Tag Compound -1: The Nether, 0: The Overworld, 1: The End Valid dimensions are defined per dimension registry sent before this
World Name Identifier Name of the world being spawned into
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed.
Max Players Unsigned Byte VarInt 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
Is Debug Boolean True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks
Is Flat Boolean True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63
Huh.png The following information needs to be added to this page:
Lay out and explain the format

Default Vanilla Dimension/Biome Codec

Known dimension attributes:

Name Type Meaning Values
name String Dimension's name "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
piglin_safe Byte Whether piglins shake and transform to zombified piglins. 1: true, 0: false
natural Byte When false, compasses spin randomly. When true, nether portals can spawn zombified piglins. 1: true, 0: false
ambient_light Float How much light the dimension has. 0.0 to 1.0
fixed_time Long If this is set to a number, the time of the day is the specified value. false, or 0 to 24000
infiniburn String A resource location defining what block tag to use for infiniburn. "" or minecraft resource "minecraft:..."
respawn_anchor_works Byte Whether players can charge and use respawn anchors. 1: true, 0: false
has_skylight Byte Whether the dimension has skylight access or not. 1: true, 0: false
bed_works Byte Whether players can use a bed to sleep. 1: true, 0: false
effects String ? "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
has_raids Byte Whether players with the Bad Omen effect can cause a raid. 1: true, 0: false
logical_height Int The maximum height to which chorus fruits and nether portals can bring players within this dimension. 0-256
coordinate_scale Float The multiplier applied to coordinates when traveling to the dimension. 1: true, 0: false
ultrawarm Byte Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner. 1: true, 0: false
has_ceiling Byte Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster. 1: true, 0: false

Unlock Recipes

Packet ID State Bound To Field Name Field Type Notes
0x37 0x35 Play Client
Action VarInt 0: init, 1: add, 2: remove
Crafting Recipe Book Open Boolean If true, then the crafting recipe book will be open when the player opens its inventory.
Crafting Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Smelting Recipe Book Open Boolean If true, then the smelting recipe book will be open when the player opens its inventory.
Smelting Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Blast Furance Recipe Book Open Boolean If true, then the blast furnace recipe book will be open when the player opens its inventory.
Blast Furance Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Smoker Recipe Book Open Boolean If true, then the smoker recipe book will be open when the player opens its inventory.
Smoker Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Array size 1 VarInt Number of elements in the following array
Recipe IDs Array of Identifier
Array size 2 Optional VarInt Number of elements in the following array, only present if mode is 0 (init)
Recipe IDs Optional Array of Identifier, only present if mode is 0 (init)

Action:

  • 0 (init) = All the recipes in the list 2 will added to the recipe book. All the recipes in list 1 will be tagged as displayed, recipes that aren't tagged will be shown in the notification.
  • 1 (add) = All the recipes in the list are added and their icon will be shown in the notification.
  • 2 (remove) = Remove all the recipes in the list. This allows them to re-displayed when they are readded.

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
0x3B 0x39 Play Client Dimension Int Enum NBT Tag Compound -1: The Nether, 0: The Overworld, 1: The End Valid dimensions are defined per dimension registry sent in Join Game
World Name Identifier Name of the world being spawned into
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
Previous Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
Level Type String (16) Same as Join Game
Is Debug Boolean True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks
Is Flat Boolean True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63
Copy metadata Boolean If false, metadata is reset on the respawned player entity. Set to true for dimension changes (including the dimension change triggered by sending client status perform respawn to exit the end poem/credits), and false for normal respawns.
Huh.png The following information needs to be added to this page:
Does the new World Name field resolve this same-dimension issue?

Warning.png 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.

Multi Block Change

Packet ID State Bound To Field Name Field Type Notes
0x10 0x3B Play Client Long Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right)
Boolean Always inverse the preceding Update Light packet's "Trust Edges" bool
Array size VarInt Number of elements in the following array
Array of VarLong Each entry is composed of the block id, shifted right by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).

Entity Properties

Sets attributes on the given entity.

Packet ID State Bound To Field Name Field Type Notes
0x59 0x58 Play Client Entity ID VarInt
Number Of Properties Int Number of elements in the following array
Property Key Array String (64) Identifier See below
Value Double See below
Number Of Modifiers VarInt Number of elements in the following array
Modifiers Array of Modifier Data See Attribute#Modifiers. Modifier Data defined below.

Known Key values (see also Attribute#Modifiers):

Key Default Min Max Label
generic.maxHealth generic.max_health 20.0 0.0 1024.0 Max Health
generic.followRange generic.follow_range 32.0 0.0 2048.0 Follow Range
generic.knockbackResistance generic.knockback_resistance 0.0 0.0 1.0 Knockback Resistance
generic.movementSpeed generic.movement_speed 0.7 0.0 1024.0 Movement Speed
generic.attackDamage generic.attack_damage 2.0 0.0 2048.0 Attack Damage
generic.attackSpeed generic.attack_speed 4.0 0.0 1024.0 Attack Speed
generic.flyingSpeed generic.flying_speed 0.4 0.0 1024.0 Flying Speed
generic.armor 0.0 0.0 30.0 Armor
generic.armorToughness generic.armor_toughness 0.0 0.0 20.0 Armor Toughness
generic.attackKnockback generic.attack_knockback 0.0 0.0 5.0
generic.luck 0.0 -1024.0 1024.0 Luck
horse.jumpStrength horse.jump_strength 0.7 0.0 2.0 Jump Strength
zombie.spawnReinforcements zombie.spawn_reinforcements 0.0 0.0 1.0 Spawn Reinforcements Chance
generic.reachDistance 5.0 0.0 1024.0 Player Reach Distance (Forge only)
forge.swimSpeed 1.0 0.0 1024.0 Swimming Speed (Forge only)

Unknown attributes will cause a game crash (MC-150405) due to the default minimum being larger than the default value.

Modifier Data structure:

Field Name Field Type Notes
UUID UUID
Amount Double May be positive or negative
Operation Byte See below

The operation controls how the base value of the modifier is changed.

  • 0: Add/subtract amount
  • 1: Add/subtract amount percent of the current value
  • 2: Multiply by amount percent

All of the 0's are applied first, and then the 1's, and then the 2's.

Declare Recipes

Packet ID State Bound To Field Name Field Type Notes
0x5B 0x5A Play Client Num Recipes VarInt Number of elements in the following array
Recipe Recipe ID Array Identifier
Type String The recipe type, see below
Data Optional, varies Additional data for the recipe. For some types, there will be no data.

Recipe types:

Type Description Data
crafting_shapeless Shapeless crafting recipe. All items in the ingredient list must be present, but in any order/slot. As follows:
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
crafting_shaped Shaped crafting recipe. All items must be present in the same pattern (which may be flipped horizontally or translated) As follows:
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
crafting_special_armordye Recipe for dying leather armor None
crafting_special_bookcloning Recipe for copying contents of written books
crafting_special_mapcloning Recipe for copying maps
crafting_special_mapextending Recipe for adding paper to maps
crafting_special_firework_rocket Recipe for making firework rockets
crafting_special_firework_star Recipe for making firework stars
crafting_special_firework_star_fade Recipe for making firework stars fade between multiple colors
crafting_special_repairitem Recipe for repairing items via crafting
crafting_special_tippedarrow Recipe for crafting tipped arrows
crafting_special_bannerduplicate Recipe for copying banner patterns
crafting_special_banneraddpattern Recipe for adding patterns to banners
crafting_special_shielddecoration Recipe for applying a banner's pattern to a shield
crafting_special_shulkerboxcoloring Recipe for recoloring a shulker box
smelting Smelting recipe As follows:
Name Type Description
Group String Used to group similar recipes together in the recipe book.
Ingredient Ingredient
Result Slot
Experience Float
Cooking time VarInt
blasting Blast furnace recipe
smoking Smoker recipe
campfire_cooking Campfire recipe
stonecutting Stonecutter recipe As follows:
Name Type Description
Group String Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
Ingredient Ingredient
Result Slot
smithing Smithing table recipe As follows:
Name Type Description
Base Ingredient First item
Addition Ingredient Second item
Result Slot

Ingredient is defined as:

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.

Serverbound

Interact Entity

This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).

A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.

Note that middle-click in creative mode is interpreted by the client and sent as a Creative Inventory Action packet instead.

Packet ID State Bound To Field Name Field Type Notes
0x0E Play Server Entity ID VarInt The ID of the entity to interact
Type VarInt Enum 0: interact, 1: attack, 2: interact at
Target X Optional Float Only if Type is interact at
Target Y Optional Float Only if Type is interact at
Target Z Optional Float Only if Type is interact at
Hand Optional VarInt Enum Only if Type is interact or interact at; 0: main hand, 1: off hand
Sneaking Boolean If the client is sneaking.

Generate Structure

Sent when Generate is pressed on the Jigsaw Block interface.

Packet ID State Bound To Field Name Field Type Notes
0x0F Play Server Location Position Block entity location
Levels VarInt Value of the levels slider/max depth to generate
Keep Jigsaws Boolean

Player Abilities (serverbound)

The latter 2 fields are used to indicate the walking and flying speeds respectively, while the first field is used to determine the value of 4 booleans.

The vanilla client sends this packet when the player starts/stops flying with the Flags parameter changed accordingly. All other parameters are ignored by the vanilla server.

Packet ID State Bound To Field Name Field Type Notes
0x19 0x1A Play Server Flags Byte Bit mask. 0x08: damage disabled (god mode), 0x04: can fly, 0x02: is flying, 0x01: is Creative
Flying Speed Float
Walking Speed Float

Set Displayed Recipe

Replaces Recipe Book Data, type 0.

Packet ID State Bound To Field Name Field Type Notes
0x1E Play Server Recipe ID Identifier

Set Recipe Book State

Replaces Recipe Book Data, type 1.

Packet ID State Bound To Field Name Field Type Notes
0x1F Play Server Book ID VarInt enum 0: crafting, 1: furnace, 2: blast furnace, 3: smoker
Book Open Boolean
Filter Active Boolean

Update Jigsaw Block

Sent when Done is pressed on the Jigsaw Block interface.

Packet ID State Bound To Field Name Field Type Notes
0x27 0x28 Play Server Location Position Block entity location
Attachment type Identifier
Name Identifier
Target Identifier
Target pool Pool Identifier
Final state String "Turns into" on the GUI, final_state in NBT
Joint type String rollable if the attached piece can be rotated, else aligned

Entity Equipment

Packet ID State Bound To Field Name Field Type Notes
0x47 Play Client Entity ID VarInt Entity's EID
Slot VarInt Enum Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
Item Slot
Equipment Slot Array Byte Enum Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet). Also has the top bit set if another entry follows, and otherwise unset if this is the last item in the array.
Item Slot

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 578 753)
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

Login Success

Packet ID State Bound To Field Name Field Type Notes
0x02 Login Client UUID String (36) UUID Unlike in other packets, this field contains the UUID as a string with hyphens.
Username String (16)

This packet switches the connection state to play.

Serverbound

No changes so far.