Difference between revisions of "Pre-release protocol"

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(18w16a)
(1.16.2-pre3. There may be other changes.)
 
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.12.2, protocol 340]]) to the current pre-release (currently [[Protocol version numbers|18w16a, protocol 372]]). 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|1.16.2-pre3, protocol 748]]). 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 ===
  
==== Other definitions ====
+
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.
 
 
===== Global palette =====
 
A table/dictionary/palette mapping nonnegative integers to block states. {{change|The block state IDs can be constructed from this table by multiplying what the Minecraft Wiki calls “block IDs” by 16 and adding the metadata/damage value (or in most programming languages block_id << 4 {{!}} metadata).|Block state IDs are created in a linear fashion based off of order of assignmentOne block state ID allocated for each unique block state for a block; if a block has multiple properties then the number of allocated states is the product of the number of values for each property.  A current list of properties and state ID ranges is found on [http://pokechu22.github.io/Burger/18w15a.html burger].}}
 
 
 
{{Change||Alternatively, the vanilla server now includes an option to export the current block state ID mapping, by running <code>java -cp minecraft_server.18w15a.jar net.minecraft.data.Main --reports</code> (use <code>--help</code> for a list of other options).  One can parse the generated <code>blocks.json</code> to convert known block states to and from ids.}}
 
  
 
=== Packets ===
 
=== Packets ===
Line 27: Line 22:
 
  |-
 
  |-
 
!colspan="4"| Play clientbound
 
!colspan="4"| Play clientbound
{{PacketList|0x04|Spawn Painting}}
+
{{PacketList|0x02|Spawn Weather Entity|pre=removed}}
{{PacketList|0x07|Statistics}}
+
{{PacketList|{{change|0x03|0x02}}|Spawn Living Entity|pre=unchanged}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x04|0x03}}|Spawn Painting|pre=unchanged}}
{{PacketList|0x0B|Block Change}}
+
{{PacketList|{{change|0x05|0x04}}|Spawn Player|pre=unchanged}}
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x06|0x05}}|Entity Animation (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x10|0x0F}}|Multi Block Change}}
+
{{PacketList|{{change|0x07|0x06}}|Statistics|pre=unchanged}}
{{PacketList|{{change|0x0E|0x10}}|Tab-Complete (clientbound)}}
+
{{PacketList|{{change|0x08|0x07}}|Acknowledge Player Digging|pre=unchanged}}
{{PacketList|0x11|Declare Commands|rel=added}}
+
{{PacketList|{{change|0x09|0x08}}|Block Break Animation|pre=unchanged}}
{{PacketList|{{change|0x11|0x12}}|Confirm Transaction (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0A|0x09}}|Block Entity Data|pre=unchanged}}
{{PacketList|{{change|0x12|0x13}}|Close Window (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0B|0x0A}}|Block Action|pre=unchanged}}
{{PacketList|{{change|0x13|0x14}}|Open Window|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0B}}|Block Change|pre=unchanged}}
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0C}}|Boss Bar|pre=unchanged}}
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
+
{{PacketList|{{change|0x0E|0x0D}}|Server Difficulty|pre=unchanged}}
{{PacketList|{{change|0x16|0x17}}|Set Slot|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)}}
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
+
{{PacketList|{{change|0x11|0x0F}}|Tab-Complete (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x12|0x10}}|Declare Commands|pre=unchanged}}
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect}}
+
{{PacketList|{{change|0x13|0x11}}|Window Confirmation (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x12}}|Close Window (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x13}}|Window Items|pre=unchanged}}
{{PacketList|{{change|0x1C|0x1D}}|Explosion|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x14}}|Window Property|pre=unchanged}}
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x15}}|Set Slot|pre=unchanged}}
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x16}}|Set Cooldown|pre=unchanged}}
{{PacketList|{{change|0x1F|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x17}}|Plugin Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x20|0x21}}|Chunk Data}}
+
{{PacketList|{{change|0x1A|0x18}}|Named Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x21|0x22}}|Effect|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x19}}|Disconnect (play)|pre=unchanged}}
{{PacketList|{{change|0x22|0x23}}|Spawn Particle}}
+
{{PacketList|{{change|0x1C|0x1A}}|Entity Status|pre=unchanged}}
{{PacketList|{{change|0x23|0x24}}|Join Game|pre=unchanged}}
+
{{PacketList|{{change|0x1D|0x1B}}|Explosion|pre=unchanged}}
{{PacketList|{{change|0x24|0x25}}|Map}}
+
{{PacketList|{{change|0x1E|0x1C}}|Unload Chunk|pre=unchanged}}
{{PacketList|{{change|0x25|0x26}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x1D}}|Change Game State|pre=unchanged}}
{{PacketList|{{change|0x26|0x27}}|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x1E}}|Open Horse Window|pre=unchanged}}
{{PacketList|{{change|0x27|0x28}}|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x1F}}|Keep Alive (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x28|0x29}}|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x20}}|Chunk Data}}
{{PacketList|{{change|0x29|0x2A}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x21}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2B}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x24|0x22}}|Particle|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Craft Recipe Response}}
+
{{PacketList|{{change|0x25|0x23}}|Update Light}}
{{PacketList|{{change|0x2C|0x2D}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x24}}|Join Game}}
{{PacketList|{{change|0x2D|0x2E}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x25}}|Map Data|pre=unchanged}}
{{PacketList|{{change|0x2E|0x2F}}|Player List Item|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x26}}|Trade List|pre=unchanged}}
{{PacketList|0x30|Face Player|rel=added}}
+
{{PacketList|{{change|0x29|0x27}}|Entity Position|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x2A|0x28}}|Entity Position and Rotation|pre=unchanged}}
{{PacketList|{{change|0x30|0x32}}|Use Bed|pre=unchanged}}
+
{{PacketList|{{change|0x2B|0x29}}|Entity Rotation|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Unlock Recipes}}
+
{{PacketList|{{change|0x2C|0x2A}}|Entity Movement|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2B}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x33|0x35}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x2C}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x34|0x36}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|{{change|0x2F|0x2D}}|Open Window|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Respawn|pre=unchanged}}
+
{{PacketList|{{change|0x30|0x2E}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x36|0x38}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x31|0x2F}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x32|0x30}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x38|0x3A}}|World Border|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x31}}|Combat Event|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x32}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x3A|0x3C}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x33}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|Display Scoreboard|pre=unchanged}}
+
{{PacketList|{{change|0x36|0x34}}|Player Position And Look (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x3C|0x3E}}|Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x35}}|Unlock Recipes}}
{{PacketList|{{change|0x3D|0x3F}}|Attach Entity|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x36}}|Destroy Entities|pre=unchanged}}
{{PacketList|{{change|0x3E|0x40}}|Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x37}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x3F|0x41}}|Entity Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x38}}|Resource Pack Send|pre=unchanged}}
{{PacketList|{{change|0x40|0x42}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x39}}|Respawn}}
{{PacketList|{{change|0x41|0x43}}|Update Health|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x3A}}|Entity Head Look|pre=unchanged}}
{{PacketList|{{change|0x42|0x44}}|Scoreboard Objective}}
+
{{PacketList|{{change|0x10|0x3B}}|Multi Block Change}}
{{PacketList|{{change|0x43|0x45}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x3D|0x3C}}|Select Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x44|0x46}}|Teams}}
+
{{PacketList|{{change|0x3E|0x3D}}|World Border|pre=unchanged}}
{{PacketList|{{change|0x45|0x47}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x3F|0x3E}}|Camera|pre=unchanged}}
{{PacketList|{{change|0x46|0x48}}|Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x40|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x47|0x49}}|Time Update|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x40}}|Update View Position|pre=unchanged}}
{{PacketList|{{change|0x48|0x4A}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x41}}|Update View Distance|pre=unchanged}}
{{PacketList|0x4B|Stop Sound|rel=added}}
+
{{PacketList|0x47|Entity Equipment}}
{{PacketList|{{change|0x49|0x4C}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x4E|0x42}}|Spawn Position|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4D}}|Player List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x4F|0x4E}}|Time Update|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4E}}|Collect Item|pre=unchanged}}
+
{{PacketList|{{change|0x50|0x4F}}|Title|pre=unchanged}}
{{PacketList|{{change|0x4C|0x4F}}|Entity Teleport|pre=unchanged}}
+
{{PacketList|{{change|0x51|0x50}}|Entity Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x4D|0x50}}|Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x52|0x51}}|Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x4E|0x51}}|Entity Properties|pre=unchanged}}
+
{{PacketList|{{change|0x53|0x52}}|Stop Sound|pre=unchanged}}
{{PacketList|{{change|0x4F|0x52}}|Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x54|0x53}}|Player List Header And Footer|pre=unchanged}}
{{PacketList|0x53|Declare Recipes|rel=added}}
+
{{PacketList|{{change|0x55|0x54}}|NBT Query Response|pre=unchanged}}
{{PacketList|0x54|Tags|rel=added}}
+
{{PacketList|{{change|0x56|0x55}}|Collect Item|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x56}}|Entity Teleport|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x57}}|Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x58}}|Entity Properties}}
 +
{{PacketList|{{change|0x5A|0x59}}|Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5A}}|Declare Recipes}}
 +
{{PacketList|{{change|0x5C|0x5B}}|Tags|pre=unchanged}}
 
  |-
 
  |-
 
!colspan="4"| Play serverbound
 
!colspan="4"| Play serverbound
{{PacketList|{{change|0x02|0x01}}|Chat Message (serverbound)|pre=unchanged}}
+
{{PacketList|0x0E|Interact Entity}}
{{PacketList|{{change|0x03|0x02}}|Client Status|pre=unchanged}}
+
{{PacketList|0x0F|Generate Structure|rel=added}}
{{PacketList|{{change|0x04|0x03}}|Client Settings|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x10}}|Keep Alive (serverbound)|pre=unchanged}}
{{PacketList|{{change|0x01|0x04}}|Tab-Complete (serverbound)}}
+
{{PacketList|{{change|0x10|0x11}}|Lock Difficulty|pre=unchanged}}
{{PacketList|0x12|Craft Recipe Request}}
+
{{PacketList|{{change|0x11|0x12}}|Player Position|pre=unchanged}}
{{PacketList|0x17|Recipe Book Data}}
+
{{PacketList|{{change|0x12|0x13}}|Player Position And Rotation (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Player Movement|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Vehicle Move (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Steer Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Craft Recipe Request|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Player Abilities (serverbound)}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Player Digging|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Entity Action|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Steer Vehicle|pre=unchanged}}
 +
{{PacketList|0x1D|Recipe Book Data|pre=removed}}
 +
{{PacketList|0x1E|Set Displayed Recipe|rel=added}}
 +
{{PacketList|0x1F|Set Recipe Book State|rel=added}}
 +
{{PacketList|{{change|0x1E|0x20}}|Name Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x21}}|Resource Pack Status|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x22}}|Advancement Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x23}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x24}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x25}}|Held Item Change (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x26}}|Update Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x27}}|Update Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x28}}|Creative Inventory Action|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x29}}|Update Jigsaw Block}}
 +
{{PacketList|{{change|0x28|0x2A}}|Update Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2B}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2C}}|Animation (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2D}}|Spectate|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2E}}|Player Block Placement|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2F}}|Use Item|pre=unchanged}}
 +
|-
 +
!colspan="4"| Login clientbound
 +
{{PacketList|0x02|Login Success}}
 
  |}
 
  |}
  
 
== New/modified data types ==
 
== New/modified data types ==
  
=== [[Slot]] ===
+
No changes so far.
  
{| class="wikitable"
+
== Entity Metadata ==
! Name
 
! Type
 
! Meaning
 
|-
 
| {{Change|Block ID|Item ID}}
 
| Short
 
| The {{Minecraft Wiki|Data values#Block IDs|item{{change|/block}} ID}}. A value of <code>-1</code> signifies that the slot is empty, and no further data follows. {{Change||Item IDs are now uniquely defined and are completely independent of block IDs.}}
 
|-
 
| Item Count
 
| Optional Byte
 
| Not present if Block ID is <code>-1</code>.
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Item Damage
 
| Optional Short
 
| Not present if Block ID is <code>-1</code>.
 
|-
 
| NBT
 
| Optional NBT
 
| Not present if Block ID is <code>-1</code>. If 0, there is no NBT data, and no further data follows. Otherwise the byte is the start of an NBT blob as shown below:
 
|}
 
 
 
=== Particle ===
 
 
 
{| class="wikitable"
 
! Field Name
 
! Field Type
 
! Meaning
 
|-
 
| ID
 
| VarInt
 
| The ID of the particle type, see below.
 
|-
 
| Data
 
| Varies
 
| Varies based on the particle type, see below.
 
|}
 
 
 
{| class="wikitable"
 
|-
 
! Particle Name
 
! Particle ID
 
! Data
 
|-
 
| <code>minecraft:ambient_entity_effect</code>
 
| 0
 
| None
 
|-
 
| <code>minecraft:angry_villager</code>
 
| 1
 
| None
 
|-
 
| <code>minecraft:barrier</code>
 
| 2
 
| None
 
|-
 
| <code>minecraft:block</code>
 
| 3
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | BlockState
 
  | VarInt
 
  | The ID of the block state.
 
  |}
 
|-
 
| <code>minecraft:bubble</code>
 
| 4
 
| None
 
|-
 
| <code>minecraft:cloud</code>
 
| 5
 
| None
 
|-
 
| <code>minecraft:crit</code>
 
| 6
 
| None
 
|-
 
| <code>minecraft:damage_indicator</code>
 
| 7
 
| None
 
|-
 
| <code>minecraft:dragon_breath</code>
 
| 8
 
| None
 
|-
 
| <code>minecraft:dripping_lava</code>
 
| 9
 
| None
 
|-
 
| <code>minecraft:dripping_water</code>
 
| 10
 
| None
 
|-
 
| <code>minecraft:dust</code>
 
| 11
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | Red
 
  | Float
 
  | Red value, 0-1
 
  |-
 
  | Green
 
  | Float
 
  | Green value, 0-1
 
  |-
 
  | Blue
 
  | Float
 
  | Blue value, 0-1
 
  |-
 
  | Scale
 
  | Float
 
  | The scale, will be clamped between 0.01 and 4.
 
  |}
 
|-
 
| <code>minecraft:effect</code>
 
| 12
 
| None
 
|-
 
| <code>minecraft:elder_guardian</code>
 
| 13
 
| None
 
|-
 
| <code>minecraft:enchanted_hit</code>
 
| 14
 
| None
 
|-
 
| <code>minecraft:enchant</code>
 
| 15
 
| None
 
|-
 
| <code>minecraft:end_rod</code>
 
| 16
 
| None
 
|-
 
| <code>minecraft:entity_effect</code>
 
| 17
 
| None
 
|-
 
| <code>minecraft:explosion_emitter</code>
 
| 18
 
| None
 
|-
 
| <code>minecraft:explosion</code>
 
| 19
 
| None
 
|-
 
| <code>minecraft:falling_dust</code>
 
| 20
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | BlockState
 
  | VarInt
 
  | The ID of the block state.
 
  |}
 
|-
 
| <code>minecraft:firework</code>
 
| 21
 
| None
 
|-
 
| <code>minecraft:fishing</code>
 
| 22
 
| None
 
|-
 
| <code>minecraft:flame</code>
 
| 23
 
| None
 
|-
 
| <code>minecraft:happy_villager</code>
 
| 24
 
| None
 
|-
 
| <code>minecraft:heart</code>
 
| 25
 
| None
 
|-
 
| <code>minecraft:instant_effect</code>
 
| 26
 
| None
 
|-
 
| <code>minecraft:item</code>
 
| 27
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | Item
 
  | [[Slot]]
 
  | The item that will be used.
 
  |}
 
|-
 
| <code>minecraft:item_slime</code>
 
| 28
 
| None
 
|-
 
| <code>minecraft:item_snowball</code>
 
| 29
 
| None
 
|-
 
| <code>minecraft:large_smoke</code>
 
| 30
 
| None
 
|-
 
| <code>minecraft:lava</code>
 
| 31
 
| None
 
|-
 
| <code>minecraft:mycelium</code>
 
| 32
 
| None
 
|-
 
| <code>minecraft:note</code>
 
| 33
 
| None
 
|-
 
| <code>minecraft:poof</code>
 
| 34
 
| None
 
|-
 
| <code>minecraft:portal</code>
 
| 35
 
| None
 
|-
 
| <code>minecraft:rain</code>
 
| 36
 
| None
 
|-
 
| <code>minecraft:smoke</code>
 
| 37
 
| None
 
|-
 
| <code>minecraft:spit</code>
 
| 38
 
| None
 
|-
 
| <code>minecraft:squid_ink</code>
 
| 39
 
| None
 
|-
 
| <code>minecraft:sweep_attack</code>
 
| 40
 
| None
 
|-
 
| <code>minecraft:totem_of_undying</code>
 
| 41
 
| None
 
|-
 
| <code>minecraft:underwater</code>
 
| 42
 
| None
 
|-
 
| <code>minecraft:splash</code>
 
| 43
 
| None
 
|-
 
| <code>minecraft:witch</code>
 
| 44
 
| None
 
|-
 
| <code>minecraft:bubble_pop</code>
 
| 45
 
| None
 
|-
 
| <code>minecraft:current_down</code>
 
| 46
 
| None
 
|-
 
| <code>minecraft:bubble_column_up</code>
 
| 47
 
| None
 
|}
 
  
== Entity Metadata Format ==
+
{{#vardefine:meta_prerelease|1}}
  
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"
 
{| class="wikitable"
  ! Name
+
  ! Index
 
  ! Type
 
  ! Type
  ! Meaning
+
  !style="width: 250px;" colspan="2"| Meaning
|-
+
  ! Default
| 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 Byte 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
 
 
  |-
 
  |-
 +
| {{Metadata id|}}
 +
| VarInt
 +
|colspan="2"| Hooked entity id + 1, or 0 if there is no hooked entity
 
  | 0
 
  | 0
| Byte
+
  |- {{Added}}
|
+
  | {{Metadata id|added}}
|-
 
| 1
 
| VarInt
 
|
 
|-
 
| 2
 
| Float
 
|
 
|-
 
| 3
 
| String
 
|
 
|-
 
| 4
 
| [[Chat]]
 
|
 
|- style="background-color: #d9ead3;"
 
| 5
 
| OptChat (Boolean + Optional [[Chat]])
 
| [[Chat]] is present if the Boolean is set to true
 
  |-
 
| {{change|5|6}}
 
| [[Slot]]
 
|
 
|-
 
  | {{change|6|7}}
 
 
  | Boolean
 
  | Boolean
  |  
+
  |colspan="2"| Is catchable
|-
+
  | False
| {{change|7|8}}
 
| Rotation
 
| 3 floats: rotation on x, rotation on y, rotation on z
 
|-
 
| {{change|8|9}}
 
| [[Data Types#Position|Position]]
 
|
 
|-
 
| {{change|9|10}}
 
| OptPosition (Boolean + Optional Position)
 
| Position is present if the Boolean is set to true
 
|-
 
| {{change|10|11}}
 
| Direction (VarInt)
 
| (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
|-
 
| {{change|11|12}}
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|-
 
| {{change|12|13}}
 
| OptBlockID (VarInt)
 
| 0 for absent, otherwise index into the global palette.  (Air is treated as absent)
 
|-
 
| {{change|13|14}}
 
| [[NBT|NBT Tag]]
 
|
 
|- style="background-color: #d9ead3;"
 
| 15
 
| [[#Particle]]
 
  |  
 
 
  |}
 
  |}
  
=== Entity ===
+
=== Abstract Arrow ===
 +
 
 +
{{Metadata inherit|Abstract Arrow|inherits=Entity|start_at=7}}
  
The base class.
+
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"
 
{| class="wikitable"
Line 505: Line 186:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="9"| 0
+
  | rowspan="3" | {{Metadata id|}}
  |rowspan="9"| Byte
+
  | rowspan="3" | Byte
 
  ! Bit mask
 
  ! Bit mask
 
  ! Meaning
 
  ! Meaning
  |rowspan="9"| 0
+
  | rowspan="3" | 0
 
  |-
 
  |-
 
  | 0x01
 
  | 0x01
  | On Fire
+
  | Is critical
 
  |-
 
  |-
 
  | 0x02
 
  | 0x02
  | Crouched
+
  | Is noclip (used by loyalty tridents when returning)
 +
|- {{removed}}
 +
| {{Metadata id|removed}}
 +
| OptUUID
 +
|colspan="2"| Unused
 +
| Empty
 
  |-
 
  |-
  | 0x04
+
  | {{Metadata id|}}
| Unused (previously riding)
+
  | Byte
|-
+
  |colspan="2"| Peircing level
| 0x08
+
  | 0
| Sprinting
 
|-
 
| 0x10
 
| Unused (previously eating/drinking/blocking; use hand state now)
 
|-
 
| 0x20
 
| Invisible
 
|-
 
| 0x40
 
| Glowing effect
 
|-
 
| 0x80
 
| Flying with {{Minecraft Wiki|elytra}}
 
  |-
 
| 1
 
| VarInt
 
|colspan="2"| Air
 
| 300
 
|-
 
| 2
 
| {{change|String|OptChat}}
 
|colspan="2"| Custom name
 
| empty
 
|-
 
| 3
 
| Boolean
 
|colspan="2"| Is custom name visible
 
| false
 
|-
 
| 4
 
| Boolean
 
|colspan="2"| Is silent
 
| false
 
|-
 
| 5
 
| Boolean
 
  |colspan="2"| No gravity
 
  | false
 
 
  |}
 
  |}
  
=== AreaEffectCloud ===
+
=== Tipped Arrow ===
  
Extends [[#Entity|Entity]].
+
{{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.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 571: Line 221:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 6
+
  | {{Metadata id|}}
| Float
 
|colspan="2"| Radius
 
| 0.5
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Color (only for mob spell particle)
 
| 0
 
|-
 
| 8
 
| Boolean
 
|colspan="2"| Ignore radius and show effect as single point, not area
 
| false
 
|- style="background-color: #d9ead3;"
 
| 9
 
| Particle
 
| colspan="2"| The [[#Particle]]
 
| <code>effect</code>
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 9
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Particle ID
+
  |colspan="2"| Color (-1 for no particles)
| 15 (mobSpell)
+
  | -1
  |- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 10
 
| VarInt
 
|colspan="2"| Particle parameter 1
 
| 0
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 11
 
| VarInt
 
|colspan="2"| Particle parameter 2
 
| 0
 
 
  |}
 
  |}
 +
 +
=== 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" style="background-color: #d9ead3;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 617: Line 243:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 7
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Loyalty level (enchantment)
 
  |colspan="2"| Loyalty level (enchantment)
 
  | 0
 
  | 0
 +
|-
 +
| {{Metadata id|}}
 +
| Boolean
 +
|colspan="2"| Has enchantment glint
 +
| False
 
  |}
 
  |}
  
=== Boat ===
+
=== Strider ===
  
Extends [[#Entity|Entity]].
+
{{Metadata inherit|Strider|inherits=Animal|start_at=16}}
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 633: Line 264:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 6
+
  | {{Metadata id|}}
| VarInt
 
|colspan="2"| Time since last hit
 
| 0
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Forward direction
 
| 1
 
|-
 
| 8
 
| Float
 
|colspan="2"| Damage taken
 
| 0.0
 
|-
 
| 9
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak)
+
  |colspan="2"| Total time to "boost" with warped fungus on a stick for
 
  | 0
 
  | 0
 
  |-
 
  |-
  | 10
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Right paddle turning
+
  |colspan="2"| Is shaking (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava))
 
  | false
 
  | false
 
  |-
 
  |-
  | 11
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Left paddle turning
+
  |colspan="2"| Has saddle
 
  | false
 
  | false
|- style="background-color: #d9ead3;"
 
| 12
 
| VarInt
 
|colspan="2"| Splash timer (?)
 
| 0
 
 
  |}
 
  |}
  
=== Phantom ===
+
=== Hoglin ===
  
Extends [[#Flying|Flying]].
+
{{Metadata inherit|Hoglin|inherits=Animal|start_at=16}}
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 679: Line 290:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
  | VarInt
+
  | Boolean
  |colspan="2"| Size
+
  |colspan="2"| Is immune to zombification
  | 0
+
  | false
 
  |}
 
  |}
  
Hitbox size is determined by horizontal=0.9 + 0.2*size and vertical=0.5 + 0.1 * i
+
=== Zoglin ===
  
=== Dolphin ===
+
{{Metadata inherit|Hoglin|inherits=Monster|start_at=15}}
  
Extends [[#Creature|Creature]].
+
{| class="wikitable" {{added}}
 
 
No additional metadata.
 
 
 
=== WaterMob ===
 
 
 
Extends {{Change|[[#Insentient|Insentient]]|[[#Creature|Creature]]}}.
 
 
 
No additional metadata.
 
 
 
=== Abstract fish ===
 
 
 
Extends [[#WaterMob|WaterMob]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 709: Line 306:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| From bucket
+
  |colspan="2"| Is baby
  | False
+
  | false
 
  |}
 
  |}
  
=== Cod ===
+
=== Base Piglin ===
  
Extends [[#AbstractFish|AbstractFish]].
+
{{Metadata inherit|Base Piglin|inherits=Monster|start_at=15}}
  
No additional metadata.
+
{| class="wikitable" {{added}}
 
 
=== Puffer fish ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 731: Line 322:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 13
+
  | {{Metadata id|}}
| VarInt
+
  | Boolean
|colspan="2"| PuffState (varies from 0 to 2)
+
  |colspan="2"| Is immune to zombification
| 0
+
  | false
|}
 
 
 
=== Salmon ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
No additional metadata.
 
 
 
=== Tropical fish ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
  | 13
 
| VarInt
 
  |colspan="2"| Variant
 
  | 0
 
 
  |}
 
  |}
  
=== Turtle ===
+
=== Piglin ===
  
Extends [[#Animal|Animal]].
+
{{Metadata inherit|Piglin|inherits=Base Piglin}}
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 769: Line 338:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 13
+
  | {{Metadata id|}}
| BlockPos
 
|colspan="2"| Home pos
 
| (0, 0, 0)
 
|-
 
| 14
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Has egg
+
  |colspan="2"| Is baby
 
  | false
 
  | false
 
  |-
 
  |-
  | 15
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Laying egg (?)
+
  |colspan="2"| Is charging crossbow
 
  | false
 
  | false
 
  |-
 
  |-
  | 16
+
  | {{Metadata id|}}
| BlockPos
 
|colspan="2"| Travel pos
 
| (0, 0, 0)
 
|-
 
| 17
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Going home
+
  |colspan="2"| Is dancing
| false
 
|-
 
| 18
 
| Boolean
 
|colspan="2"| Traveling
 
 
  | false
 
  | false
 
  |}
 
  |}
  
=== Drowned ===
+
=== Piglin Brute ===
  
Extends [[#Drowned|Drowned]].
+
{{Metadata inherit|Piglin Brute|inherits=Base Piglin}}
  
{| class="wikitable" style="background-color: #d9ead3;"
+
No additional metadata.
 +
 
 +
=== Wolf ===
 +
 
 +
{{Metadata inherit|Wolf|inherits=TameableAnimal|start_at=18}}
 +
 
 +
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
  |-  
+
  |-
  | 15
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Has target (?)
+
  |colspan="2"| Is begging
 
  | false
 
  | false
|}
 
 
== Block Actions ==
 
 
No changes so far.
 
 
== Plugin Channels ==
 
 
=== <code>MC|StopSound</code> ===
 
 
{{Change|''Server to client''}}
 
 
{{Change|Used to implement {{Minecraft Wiki|Commands#StopSound|the <code>/stopsound</code> command}}.  Stops a sound that is currently playing on the client.}}
 
 
{| class="wikitable" style="background-color: #f4cccc; text-decoration: line-through;"
 
! Field name
 
! Field type
 
! Notes
 
 
  |-
 
  |-
  | Sound category
+
  | {{Metadata id|}}
  | String
+
  | VarInt
  | Should be one of the sound categories used in [[Protocol#Named Sound Effect|Named Sound Effect]], but if it's invalid or empty then it is (intentionally) treated as ''all'' sound categories.
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
  |-
+
| 14 (Red)
  | Sound name
+
  |- {{Added}}
  | String
+
  | {{Metadata id|}}
  | A [http://pokechu22.github.io/Burger/1.11.html#sounds sound effect name]. If left empty, ''all'' sounds are stopped.
+
  | VarInt
 +
  |colspan="2"| Anger time
 +
  | 0
 
  |}
 
  |}
  
{{Change|Emptiness of sound category or sound name can be combined, IE a empty sound name but a set sound category will stop all sounds in the given category.}}
+
=== {{Change|Zombie Pigman|Zombified Piglin}} ===
  
{{Change||This plugin channel has been replaced by the [[#Stop sound|stop sound]] packet.}}
+
{{Metadata inherit|{{Change|Zombie Pigman|Zombified Piglin}}|inherits=Zombie|start_at=18}}
  
=== <code>MC|DebugCaves</code> ===
+
No additional metadata.
  
Never sent, but (presumably) used to debug caves.  Does not render without modifying the client.
+
== Block Actions ==
  
{| class="wikitable" style="background-color: #d9ead3;"
+
No changes so far.
!colspan="2"| Field name
 
!colspan="2"| Field type
 
! Notes
 
|-
 
|colspan="2"| Unknown 1
 
|colspan="2"| Position
 
|
 
|-
 
|colspan="2"| Count
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="2"| Data
 
| Unknown 2
 
|rowspan="2"| Array
 
| Position
 
|
 
|-
 
| Unknown 3
 
| Float
 
|
 
|}
 
  
=== <code>MC|DebugStructures</code> ===
+
== Inventories ==
  
Never sent, but (presumably) used to debug structures.  Does not render without modifying the client.
+
No changes so far.
  
{| class="wikitable" style="background-color: #d9ead3;"
+
== Plugin Channels ==
!colspan="2"| Field name
 
!colspan="2"| Field type
 
! Notes
 
|-
 
|colspan="2"| Unknown 1
 
|colspan="2"| Int
 
|
 
|-
 
|colspan="2"| Bounding box minX
 
|colspan="2"| Int
 
|rowspan="6"| min must be less than max
 
|-
 
|colspan="2"| Bounding box minY
 
|colspan="2"| Int
 
|-
 
|colspan="2"| Bounding box minZ
 
|colspan="2"| Int
 
|-
 
|colspan="2"| Bounding box maxX
 
|colspan="2"| Int
 
|-
 
|colspan="2"| Bounding box maxY
 
|colspan="2"| Int
 
|-
 
|colspan="2"| Bounding box maxZ
 
|colspan="2"| Int
 
|-
 
|colspan="2"| Count
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="7"| Unknown
 
| Bounding box minX
 
|rowspan="7"| Array
 
| Int
 
|rowspan="6"| min must be less than max
 
|-
 
| Bounding box minY
 
| Int
 
|-
 
| Bounding box minZ
 
| Int
 
|-
 
| Bounding box maxX
 
| Int
 
|-
 
| Bounding box maxY
 
| Int
 
|-
 
| Bounding box maxZ
 
| Int
 
|-
 
| Unknown
 
| Boolean
 
|
 
|}
 
  
=== <code>MC|DebugWorldGenAttempt</code> ===
+
No changes so far.
 
 
Never sent, but (presumably) used to debug something with world generation. Does not render without modifying the client.
 
 
 
{{warning|This channel is invalid, as its name is longer than the max length (23 > 20).}}
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Field name
 
! Field type
 
! Notes
 
|-
 
| Unknown 1
 
| Position
 
|
 
|-
 
| Unknown 2
 
| Float
 
|
 
|-
 
| Unknown 3
 
| Float
 
|
 
|-
 
| Unknown 4
 
| Float
 
|
 
|-
 
| Unknown 5
 
| Float
 
|
 
|-
 
| Unknown 6
 
| Float
 
|
 
|}
 
  
 
== Play ==
 
== Play ==
Line 976: Line 408:
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Spawn Painting ====
+
==== Chat Message (clientbound) ====  
 
 
This packet shows location, name, and type of painting.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| 0x04
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Entity ID
 
| VarInt
 
|
 
|-
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Motive
 
| {{Change|String (13)|VarInt}}
 
| {{Change|Name of the painting. Max length 13|Panting's ID, see below}}
 
|-
 
| Location
 
| Position
 
| Center coordinates (see below)
 
|-
 
| Direction
 
| Byte Enum
 
| Direction the painting faces (North = 2, South = 0, West = 1, East = 3)
 
|}
 
 
 
Calculating the center of an image: given a (width × height) grid of cells, with <code>(0, 0)</code> being the top left corner, the center is <code>(max(0, width / 2 - 1), height / 2)</code>. E.g. <code>(1, 0)</code> for a 2×1 painting, or <code>(1, 2)</code> for a 4×4 painting.
 
 
 
List of paintings by coordinates in <code>paintings_kristoffer_zetterstrand.png</code> (where x and y are in pixels from the top left and width and height are in pixels or 16ths of a block):
 
 
 
{| class="wikitable"
 
! Name
 
!style="background-color: #d9ead3;"| ID
 
! x
 
! y
 
! width
 
! height
 
|-
 
| {{Change|<code>Kebab</code>|<code>minecraft:kebab</code>}}
 
| 0
 
| 0
 
| 0
 
| 16
 
| 16
 
|-
 
| {{Change|<code>Aztec</code>|<code>minecraft:aztec</code>}}
 
| 1
 
| 16
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Alban</code>|<code>minecraft:alban</code>}}
 
| 2
 
| 32
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Aztec2</code>|<code>minecraft:aztec2</code>}}
 
| 3
 
| 48
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Bomb</code>|<code>minecraft:bomb</code>}}
 
| 4
 
| 64
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Plant</code>|<code>minecraft:plant</code>}}
 
| 5
 
| 80
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Wasteland</code>|<code>minecraft:wasteland</code>}}
 
| 6
 
| 96
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Pool</code>|<code>minecraft:pool</code>}}
 
| 7
 
| 0
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Courbet</code>|<code>minecraft:courbet</code>}}
 
| 8
 
| 32
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Sea</code>|<code>minecraft:sea</code>}}
 
| 9
 
| 64
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Sunset</code>|<code>minecraft:sunset</code>}}
 
| 10
 
| 96
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Creebet</code>|<code>minecraft:creebet</code>}}
 
| 11
 
| 128
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Wanderer</code>|<code>minecraft:wanderer</code>}}
 
| 12
 
| 0
 
| 64
 
| 16
 
| 32
 
|-
 
| {{change|<code>Graham</code>|<code>minecraft:graham</code>}}
 
| 13
 
| 16
 
| 64
 
| 16
 
| 32
 
|-
 
| {{change|<code>Match</code>|<code>minecraft:match</code>}}
 
| 14
 
| 0
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Bust</code>|<code>minecraft:bust</code>}}
 
| 15
 
| 32
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Stage</code>|<code>minecraft:stage</code>}}
 
| 16
 
| 64
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Void</code>|<code>minecraft:void</code>}}
 
| 17
 
| 96
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>SkullAndRoses</code>|<code>skull_and_roses</code>}}
 
| 18
 
| 128
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Wither</code>|<code>minecraft:wither</code>}}
 
| 19
 
| 160
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Fighters</code>|<code>minecraft:fighters</code>}}
 
| 20
 
| 0
 
| 96
 
| 64
 
| 32
 
|-
 
| {{change|<code>Pointer</code>|<code>minecraft:pointer</code>}}
 
| 21
 
| 0
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>Pigscene</code>|<code>minecraft:pigscene</code>}}
 
| 22
 
| 64
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>BurningSkull</code>|<code>minecraft:burning_skull</code>}}
 
| 23
 
| 128
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>Skeleton</code>|<code>minecraft:skeleton</code>}}
 
| 24
 
| 192
 
| 64
 
| 64
 
| 48
 
|-
 
| {{change|<code>DonkeyKong</code>|<code>minecraft:donkey_kong</code>}}
 
| 25
 
| 192
 
| 112
 
| 64
 
| 48
 
|}
 
 
 
The {{Minecraft Wiki|Painting#Canvases|Minecraft Wiki article on paintings}} also provides a list of painting names to the actual images.
 
  
==== Statistics ====
+
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.
  
Sent as a response to [[#Client_Status|Client Status]] (id 1).
+
{{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 slotSee [https://bugs.mojang.com/browse/MC-119145 MC-119145] for more information.}}
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| 0x07
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Statistic
 
|style="background-color: #f4cccc; text-decoration: line-through;"| Name
 
|rowspan="4"| Array
 
|style="background-color: #f4cccc; text-decoration: line-through;"| String (32767)
 
|style="background-color: #f4cccc; text-decoration: line-through;"| [https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff]
 
|- style="background-color: #d9ead3;"
 
| Category ID
 
| VarInt
 
| See below
 
|- style="background-color: #d9ead3;"
 
| Statistic ID
 
| VarInt
 
| See below
 
|-
 
| Value
 
| VarInt
 
| The amount to set it to
 
|}
 
 
 
Categories (these are namespaced, but with <code>:</code>. replaced with <code>.</code>):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Registry
 
|-
 
| <code>minecraft.mined</code>
 
| 0
 
| Blocks
 
|-
 
| <code>minecraft.crafted</code>
 
| 1
 
| Items
 
|-
 
| <code>minecraft.used</code>
 
| 2
 
| Items
 
|-
 
| <code>minecraft.broken</code>
 
| 3
 
| Items
 
|-
 
| <code>minecraft.picked_up</code>
 
| 4
 
| Items
 
|-
 
| <code>minecraft.dropped</code>
 
| 5
 
| Items
 
|-
 
| <code>minecraft.killed</code>
 
| 6
 
| Entities
 
|-
 
| <code>minecraft.killed_by</code>
 
| 7
 
| Entities
 
|-
 
| <code>minecraft.custom</code>
 
| 8
 
| Custom
 
|}
 
 
 
Blocks, Items, and Entities use block (not block state), item, and entity ids.
 
 
 
Custom has the following (unit only matters for clients):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Unit
 
|-
 
| <code>minecraft.leave_game</code>
 
| 0
 
| None
 
|-
 
| <code>minecraft.play_one_minute</code>
 
| 1
 
| Time
 
|-
 
| <code>minecraft.time_since_death</code>
 
| 2
 
| Time
 
|-
 
| <code>minecraft.sneak_Time</code>
 
| 3
 
| Time
 
|-
 
| <code>minecraft.walk_one_cm</code>
 
| 4
 
| Distance
 
|-
 
| <code>minecraft.crouch_one_cm</code>
 
| 5
 
| Distance
 
|-
 
| <code>minecraft.sprint_one_cm</code>
 
| 6
 
| Distance
 
|-
 
| <code>minecraft.swim_one_cm</code>
 
| 7
 
| Distance
 
|-
 
| <code>minecraft.fall_one_cm</code>
 
| 8
 
| Distance
 
|-
 
| <code>minecraft.climb_one_cm</code>
 
| 9
 
| Distance
 
|-
 
| <code>minecraft.fly_one_cm</code>
 
| 10
 
| Distance
 
|-
 
| <code>minecraft.dive_one_cm</code>
 
| 11
 
| Distance
 
|-
 
| <code>minecraft.minecart_one_cm</code>
 
| 12
 
| Distance
 
|-
 
| <code>minecraft.boat_one_cm</code>
 
| 13
 
| Distance
 
|-
 
| <code>minecraft.pig_one_cm</code>
 
| 14
 
| Distance
 
|-
 
| <code>minecraft.horse_one_cm</code>
 
| 15
 
| Distance
 
|-
 
| <code>minecraft.aviate_one_cm</code>
 
| 16
 
| Distance
 
|-
 
| <code>minecraft.jump</code>
 
| 17
 
| None
 
|-
 
| <code>minecraft.drop</code>
 
| 18
 
| None
 
|-
 
| <code>minecraft.damage_dealt</code>
 
| 19
 
| Damage
 
|-
 
| <code>minecraft.damage_taken</code>
 
| 20
 
| Damage
 
|-
 
| <code>minecraft.deaths</code>
 
| 21
 
| None
 
|-
 
| <code>minecraft.mob_kills</code>
 
| 22
 
| None
 
|-
 
| <code>minecraft.animals_bred</code>
 
| 23
 
| None
 
|-
 
| <code>minecraft.player_kills</code>
 
| 24
 
| None
 
|-
 
| <code>minecraft.fish_caught</code>
 
| 25
 
| None
 
|-
 
| <code>minecraft.talked_to_villager</code>
 
| 26
 
| None
 
|-
 
| <code>minecraft.traded_with_villager</code>
 
| 27
 
| None
 
|-
 
| <code>minecraft.eat_cake_slice</code>
 
| 28
 
| None
 
|-
 
| <code>minecraft.fill_cauldron</code>
 
| 29
 
| None
 
|-
 
| <code>minecraft.use_cauldron</code>
 
| 30
 
| None
 
|-
 
| <code>minecraft.clean_armor</code>
 
| 31
 
| None
 
|-
 
| <code>minecraft.clean_banner</code>
 
| 32
 
| None
 
|-
 
| <code>minecraft.interact_with_brewingstand</code>
 
| 33
 
| None
 
|-
 
| <code>minecraft.interact_with_beacon</code>
 
| 34
 
| None
 
|-
 
| <code>minecraft.inspect_dropper</code>
 
| 35
 
| None
 
|-
 
| <code>minecraft.inspect_hopper</code>
 
| 36
 
| None
 
|-
 
| <code>minecraft.inspect_dispenser</code>
 
| 37
 
| None
 
|-
 
| <code>minecraft.play_noteblock</code>
 
| 38
 
| None
 
|-
 
| <code>minecraft.tune_noteblock</code>
 
| 39
 
| None
 
|-
 
| <code>minecraft.pot_flower</code>
 
| 40
 
| None
 
|-
 
| <code>minecraft.trigger_trapped_chest</code>
 
| 41
 
| None
 
|-
 
| <code>minecraft.open_enderchest</code>
 
| 42
 
| None
 
|-
 
| <code>minecraft.enchant_item</code>
 
| 43
 
| None
 
|-
 
| <code>minecraft.play_record</code>
 
| 44
 
| None
 
|-
 
| <code>minecraft.interact_with_furnace</code>
 
| 45
 
| None
 
|-
 
| <code>minecraft.interact_with_crafting_table</code>
 
| 46
 
| None
 
|-
 
| <code>minecraft.open_chest</code>
 
| 47
 
| None
 
|-
 
| <code>minecraft.sleep_in_bed</code>
 
| 48
 
| None
 
|-
 
| <code>minecraft.open_shulker_box</code>
 
| 49
 
| None
 
|}
 
 
 
Units:
 
 
 
* None: just a normal number (formatted with 0 decimal places)
 
* Damage: value is 10 times the normal amount
 
* Distance: a distance in centimeters (hundredths of blocks)
 
* Time: a time span in ticks
 
 
 
==== Update Block Entity ====
 
 
 
Sets tile entity associated with the block at the given location.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,520: 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
  | Position
+
  | [[Chat]]
  |  
+
  | Limited to 32767 bytes
 
  |-
 
  |-
| 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
 
* {{Change|'''5''': Set type of flower in flower pot}}
 
* {{Change||'''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''': 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''': {{change|Set the color of a bed|Declare a bed}}
 
 
==== Block Change ====
 
 
Fired whenever a block is changed within the render distance.
 
 
{{Warning2|Changing a block in a chunk that is not loaded is not a stable action.  The Notchian client currently uses a ''shared'' empty chunk which is modified for all block changes in unloaded chunks; while in 1.9 this chunk never renders in older versions the changed block will appear in all copies of the empty chunk.  Servers should avoid sending block changes in unloaded chunks and clients should ignore such packets.}}
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x0B
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Location
 
 
  | Position
 
  | Position
| Block Coordinates
 
|-
 
| Block ID
 
| VarInt
 
| The new block state ID for the block as given in the [[#global palette|global palette]].  {{change|(When reading data: <code>type {{=}} id >> 4</code>, <code>meta {{=}} id & 15</code>, when writing data: <code>id {{=}} type << 4 {{!}} (meta & 15)</code>)|See that section for more information.}}
 
|}
 
 
==== Multi Block Change ====
 
 
Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
 
 
{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Change|Block Change]]).}}
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x10|0x0F}}
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Chunk X
 
|colspan="2"| Int
 
| Chunk X coordinate
 
|-
 
|colspan="2"| Chunk Z
 
|colspan="2"| Int
 
| Chunk Z coordinate
 
|-
 
|colspan="2"| Record Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array, i.e. the number of blocks affected
 
|-
 
|rowspan="3"| Record
 
| Horizontal Position
 
|rowspan="3"| Array
 
| Unsigned Byte
 
| The 4 most significant bits (<code>0xF0</code>) encode the X coordinate, relative to the chunk. The 4 least significant bits (<code>0x0F</code>) encode the Z coordinate, relative to the chunk.
 
|-
 
| Y Coordinate
 
| Unsigned Byte
 
| Y coordinate of the block
 
|-
 
| Block ID
 
| VarInt
 
| The new block state ID for the block as given in the [[#global palette|global palette]].  {{change|(When reading data: <code>type {{=}} id >> 4</code>, <code>meta {{=}} id & 15</code>, when writing data: <code>id {{=}} type << 4 {{!}} (meta & 15)</code>)|See that section for more information.}}
 
|}
 
 
To decode the position into a world position:
 
 
<syntaxhighlight lang="java">
 
worldX = (horizPos >> 4 & 15) + (chunkX * 16);
 
worldY = vertPos;
 
worldZ = (horizPos & 15) + (chunkZ * 16);
 
</syntaxhighlight>
 
 
 
==== Tab-Complete (clientbound) ====
 
 
Used to respond to the client's previous tab complete request.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"|  Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x0E|0x10}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
|colspan="2" style="background-color: #d9ead3;"| Transaction Id
 
|colspan="2" style="background-color: #d9ead3;"| VarInt
 
|style="background-color: #d9ead3;"| This id should also be used in the tab completion response packet, or it will be ignored.
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Start
 
|colspan="2"|  VarInt
 
| Start of the text to replace
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Length
 
|colspan="2"|  VarInt
 
| Length of the text to replace
 
|-
 
|colspan="2"|  Count
 
|colspan="2"|  VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="3"| Matches
 
| Match
 
|rowspan="3"| Array
 
| String (32767)
 
| One eligible {{change|command|value to insert}}, note that each command is sent separately instead of in a single string, hence the need for Count.  {{change||Note that for instance this doesn't include a leading <code>/</code> on commands.}}
 
|-
 
|style="background-color: #d9ead3;"| Has tooltip
 
|style="background-color: #d9ead3;"| Boolean
 
|style="background-color: #d9ead3;"| True if the following is present
 
|-
 
|style="background-color: #d9ead3;"| Tooltip
 
|style="background-color: #d9ead3;"| Optional [[Chat]]
 
|style="background-color: #d9ead3;"| Tooltip to display; only present if previous Boolean is true
 
|}
 
 
==== Declare Commands ====
 
 
Lists all of the commands on the server, and how they are parsed.
 
 
This is a tree, with one root node.  Each redirect or child node must refer only to nodes that have already been declared.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x11
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Nodes
 
| Array of Node
 
| A array of <code>CommandNode</code>s
 
|-
 
| Root index
 
| VarInt
 
| Index of the <code>RootCommandNode</code> in the previous array
 
|}
 
 
Node:
 
 
{| class="wikitable"
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| Flags
 
 
  | Byte
 
  | Byte
  |
+
  | 0: chat (chat box), 1: system message (chat box), 2: game info (above hotbar).
  {| class="wikitable"
+
  |- {{added}}
  ! Bit mask
+
  | Sender
  !colspan="2"| Meaning
+
  | 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.
  |rowspan="4"| 0x03
 
  |colspan="2"| Type of the <code>CommandNode</code>
 
  |-
 
  |0
 
  |<code>RootCommandNode</code>
 
  |-
 
  |1
 
  |<code>LiteralCommandNode</code>
 
  |-
 
  |2
 
  |<code>ArgumentCommandNode</code>
 
  |-
 
  |0x04
 
  |colspan="2"| Has command
 
  |-
 
  |0x08
 
  |colspan="2"| Has redirect node
 
  |-
 
  |0x10
 
  |colspan="2"| Has custom suggestions, currently only present if the type is a <code>ArgumentCommandNode</code>
 
  |}
 
|-
 
| Children Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Children
 
| Array of VarInt
 
| The indexes of the children <code>CommandNode</code>s within the <code>Nodes</code> array
 
|-
 
| Redirect node
 
| Optional VarInt
 
| Only if flags & 0x08. Points to the redirect <code>CommandNode</code> within the <code>Nodes</code> array
 
|-
 
| Extra node data
 
| Extra node data
 
| Type depends on the <code>CommandNode</code> type, see below.
 
|}
 
 
 
Extra node data:
 
{| class="wikitable"
 
! Type
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| <code>RootCommandNode</code>
 
| Empty
 
| Empty
 
|
 
|-
 
| <code>LiteralCommandNode</code>
 
| Literal
 
| String (32767)
 
| The text
 
|-
 
|rowspan="4"| <code>ArgumentCommandNode</code>
 
| Name
 
| String (32767)
 
| The name of the argument
 
|-
 
| Parser
 
| Identifier
 
| One of several known to the client, listed below.  If the client does not know the parser, reading this RequiredArgumentBuilder stops immediately (following fields are not read)
 
|-
 
| Properties
 
| Optional, varies
 
| See below.  Varies depending on the parser.
 
|-
 
| Suggests
 
| Optional Identifier
 
| Only present if (flags & 0x10) != 0. See below for the available types.
 
|}
 
 
 
Parsers:
 
 
 
{| class="wikitable"
 
! Identifier
 
! Description
 
! Properties
 
|-
 
| <code>brigadier:bool</code>
 
| Boolean value (<code>true</code> or <code>false</code>, case-sensitive)
 
| None
 
|-
 
| <code>brigadier:double</code>
 
| Double
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional double
 
  | Only if flags & 0x01.  If not specified, defaults to <code>-Double.MAX_VALUE</code> (≈ -1.7976931348623157E307)
 
  |-
 
  | Max
 
  | Optional double
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Double.MAX_VALUE</code> (≈ 1.7976931348623157E307)
 
  |}
 
|-
 
| <code>brigadier:float</code>
 
| Float
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional float
 
  | Only if flags & 0x01.  If not specified, defaults to <code>-Float.MAX_VALUE</code> (≈ -3.4028235E38)
 
  |-
 
  | Max
 
  | Optional float
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Float.MAX_VALUE</code> (≈ 3.4028235E38)
 
  |}
 
|-
 
| <code>brigadier:integer</code>
 
| Integer
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional integer
 
  | Only if flags & 0x01.  If not specified, defaults to <code>Integer.MIN_VALUE</code> (-2147483648)
 
  |-
 
  | Max
 
  | Optional integer
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Integer.MAX_VALUE</code> (2147483647)
 
  |}
 
|-
 
| <code>brigadier:string</code>
 
| A string
 
| A VarInt enum:
 
  {| class="wikitable"
 
  ! Value
 
  ! Name
 
  ! Description
 
  |-
 
  | 0
 
  | <code>SINGLE_WORD</code>
 
  | Reads a single word
 
  |-
 
  | 1
 
  | <code>QUOTABLE_PHRASE</code>
 
  | If it starts with a <code>"</code>, keeps reading until another <code>"</code> (allowing escaping with <code>\</code>).  Otherwise behaves the same as <code>SINGLE_WORD</code>
 
  |-
 
  | 2
 
  | <code>GREEDY_PHRASE</code>
 
  | Reads the rest of the content after the cursor.  Quotes will not be removed.
 
  |}
 
|-
 
| <code>minecraft:entity</code>
 
| A selector, player name, or UUID.
 
| Has a single flags byte:
 
  {| class="wikitable"
 
  ! Bit mask
 
  ! Meaning
 
  |-
 
  | 0x01
 
  | If set, only allows a single entity/player
 
  |-
 
  | 0x02
 
  | If set, only allows players
 
  |}
 
|-
 
| <code>minecraft:game_profile</code>
 
| A player, online or not.  Can also use a selector, which may match one or more players (but not entities).
 
| None
 
|-
 
| <code>minecraft:block_pos</code>
 
| A location, represented as 3 numbers (which must be integers).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:vec3</code>
 
| A location, represented as 3 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:vec2</code>
 
| A location, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:block_state</code>
 
| A block state, optionally including NBT and state information.
 
| None
 
|-
 
| <code>minecraft:block_predicate</code>
 
| A block, or a block tag.
 
| None
 
|-
 
| <code>minecraft:item_stack</code>
 
| An item, optionally including NBT.
 
| None
 
|-
 
| <code>minecraft:item_predicate</code>
 
| An item, or an item tag.
 
| None
 
|-
 
| <code>minecraft:color</code>
 
| A chat color.  One of the names from [[Chat#Colors]], or <code>reset</code>.  Case-insensitive.
 
| None
 
|-
 
| <code>minecraft:component</code>
 
| A JSON [[Chat]] component.
 
| None
 
|-
 
| <code>minecraft:message</code>
 
| A regular message, potentially including selectors.
 
| None
 
|-
 
| <code>minecraft:nbt</code>
 
| An NBT value, parsed using JSON-NBT rules.
 
| None
 
|-
 
| <code>minecraft:nbt_path</code>
 
| A path within an NBT value, allowing for array and member accesses.
 
| None
 
|-
 
| <code>minecraft:objective</code>
 
| A scoreboard objective.
 
| None
 
|-
 
| <code>minecraft:objective_criteria</code>
 
| A single score criterion.
 
| None
 
|-
 
| <code>minecraft:operation</code>
 
| A scoreboard operator.
 
| None
 
|-
 
| <code>minecraft:particle</code>
 
| A particle effect (an identifier with extra information following it for specific particles, mirroring the [[#Particle|Particle]] packet)
 
| None
 
|-
 
| <code>minecraft:rotation</code>
 
| An angle, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
  |-
 
| <code>minecraft:scoreboard_slot</code>
 
| A scoreboard display position slot.  <code>list</code>, <code>sidebar</code>, <code>belowName</code>, and <code>sidebar.team.${color}</code> for all chat colors (<code>reset</code> is not included)
 
| None
 
|-
 
| <code>minecraft:score_holder</code>
 
| Something that can join a team.  Allows selectors and <code>*</code>.
 
| Has a single flags byte:
 
  {| class="wikitable"
 
  ! Bit mask
 
  ! Meaning
 
  |-
 
  | 0x01
 
  | If set, allows multiple.
 
  |}
 
|-
 
| <code>minecraft:swizzle</code>
 
| A collection of up to 3 axes.
 
| None
 
|-
 
| <code>minecraft:team</code>
 
| The name of a team.  Parsed as an unquoted string.
 
| None
 
|-
 
| <code>minecraft:item_slot</code>
 
| A name for an inventory slot.
 
| None
 
|-
 
| <code>minecraft:resource_location</code>
 
| An Identifier.
 
| None
 
|-
 
| <code>minecraft:mob_effect</code>
 
| A potion effect.
 
| None
 
|-
 
| <code>minecraft:function</code>
 
| A function.
 
| None
 
|-
 
| <code>minecraft:entity_anchor</code>
 
| The entity anchor related to the facing argument in the teleport command, is feet or eyes.
 
| None
 
|-
 
| <code>minecraft:range</code>
 
| A range of values with a min and a max.
 
|
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Decimals
 
  | Boolean
 
  | Whether decimal values are allowed.
 
  |}
 
  |-
 
  | <code>minecraft:item_enchantment</code>
 
  | Represents a item enchantment.
 
| None
 
|}
 
 
 
Suggestion types:
 
 
 
{| class="wikitable"
 
  ! Identifier
 
  ! Description
 
  |-
 
  | <code>minecraft:ask_server</code>
 
  | Sends the <code>Tab-Complete</code> packet to the server to request tab completions.
 
  |-
 
  | <code>minecraft:all_recipes</code>
 
  | Suggests all the available recipes.
 
  |-
 
  | <code>minecraft:available_sounds</code>
 
  | Suggests all the available sounds.
 
  |-
 
  | <code>minecraft:summonable_entities</code>
 
  | Suggests all the summonable entities.
 
  |}
 
 
 
==== Named Sound Effect ====
 
{{See also|#Sound Effect}}
 
 
 
Used to play a sound effect on the client. Custom sounds may be added by resource packs.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x19|0x1A}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| Sound Name
 
| {{Change|String (256)|Identifier}}
 
| All sound effect names as of 1.12.2 can be seen [http://pokechu22.github.io/Burger/1.12.2.html#sounds here].
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Effect Position X
 
| Int
 
| Effect X multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Y
 
| Int
 
| Effect Y multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Z
 
| Int
 
| Effect Z multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Volume
 
| Float
 
| 1 is 100%, can be more
 
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
 
  |}
 
  |}
  
Line 2,103: 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).
 
{{Change||Indexes into the global palette are still used, but since the global palette has changed, behavior is different.}}
 
 
The bits per block value used to index in the global palette is {{change|13|14}}, which is determined by taking the base 2 logarithm of the highest state ID and then rounding up (or alternatively, simply checking how many bits are needed to represent the highest state ID).
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,118: Line 454:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x20|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 2,129: Line 465:
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | Ground-Up Continuous
+
  | Full chunk
 
  | Boolean
 
  | Boolean
  | See [[Chunk Format#Ground-up continuous|Chunk Format]]
+
  | See [[Chunk Format#Full chunk|Chunk Format]]
 
  |-
 
  |-
 
  | Primary Bit Mask
 
  | Primary Bit Mask
 
  | 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).
 +
|-
 +
| Heightmaps
 +
| [[NBT]]
 +
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 +
|- {{Added}}
 +
| Biomes 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 2,154: Line 502:
 
  |}
 
  |}
  
===== 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.
  
The data section of the packet contains most of the useful data for the chunk.
+
{{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.}}
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| Data
 
| Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
 
| The number of elements 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 {{Change|Byte|Int}} Array
 
| Only sent if Ground-Up Continuous is true; 256 {{change|bytes|entries}} if present
 
|}
 
  
==== Spawn Particle ====
+
==== Update Light ====
  
Displays the named particle
+
Updates light levels for a chunk.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,181: Line 514:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="11"| {{Change|0x22|0x23}}
+
  |rowspan="11"| {{change|0x25|0x23}}
 
  |rowspan="11"| Play
 
  |rowspan="11"| Play
 
  |rowspan="11"| Client
 
  |rowspan="11"| Client
  | Particle ID
+
  |colspan="2"| Chunk X
  | Int
+
  |colspan="2"| VarInt
  | The particle ID listed in [[#Particle]].
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | Long Distance
+
  |colspan="2"| Chunk Z
  | Boolean
+
|colspan="2"| VarInt
  | If true, particle distance increases from 256 to 65536
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 +
|- {{added}}
 +
|colspan="2"| Trust Edges
 +
|colspan="2"| Boolean
 +
  | If edges should be trusted for light updates.
 +
|
 
  |-
 
  |-
  | X
+
  |colspan="2"| Sky Light Mask
  | Float
+
  |colspan="2"| VarInt
  | X position of the particle
+
  | 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)
 
  |-
 
  |-
  | Y
+
  |colspan="2"| Block Light Mask
  | Float
+
  |colspan="2"| VarInt
  | Y position of the particle
+
  | Mask containing 18 bits, with the same order as sky light
 
  |-
 
  |-
  | Z
+
  |colspan="2"| Empty Sky Light Mask
  | Float
+
  |colspan="2"| VarInt
  | Z position of the particle
+
  | 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.
 
  |-
 
  |-
  | Offset X
+
  |colspan="2"| Empty Block Light Mask
  | Float
+
  |colspan="2"| VarInt
  | This is added to the X position after being multiplied by random.nextGaussian()
+
  | 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.
 
  |-
 
  |-
  | Offset Y
+
  |rowspan="2"| Sky Light arrays
  | Float
+
| Length
  | This is added to the Y position after being multiplied by random.nextGaussian()
+
|rowspan="2"| Array
 +
  | VarInt
 +
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | Offset Z
+
  | Sky Light array
  | Float
+
  | Array of 2048 bytes
  | This is added to the Z position after being multiplied by random.nextGaussian()
+
  | 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.
 
  |-
 
  |-
  | Particle Data
+
  |rowspan="2"| Block Light arrays
| Float
+
  | Length
  | The data of each particle
+
  |rowspan="2"| Array
  |-
+
  | VarInt
| Particle Count
+
  | Length of the following array in bytes (always 2048)
  | Int
 
  | The number of particles to create
 
 
  |-
 
  |-
  | Data
+
  | Block Light array
  | {{Change|Array of VarInt|Varies}}
+
  | Array of 2048 bytes
  | {{Change|Length depends on particle. "iconcrack" has length of 2, "blockcrack", "blockdust", and "fallingdust" have lengths of 1, the rest have 0.|The variable data listed in [[#Particle]]}}
+
  | 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.
 
  |}
 
  |}
  
==== Map ====
+
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.
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
==== Join Game ====
  
{{Warning|Map icons with types over 15 currently don't work on servers (see [https://bugs.mojang.com/browse/MC-126815 MC-126815]).}}
+
See [[Protocol Encryption]] for information on logging in.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,243: Line 581:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
  !colspan="2"| Field Type
+
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="15"| {{Change|0x24|0x25}}
+
  |rowspan="17"| {{change|0x26|0x24}}
  |rowspan="15"| Play
+
  |rowspan="17"| Play
  |rowspan="15"| Client
+
  |rowspan="17"| Client
  |colspan="2"| Item Damage
+
  | Entity ID
  |colspan="2"| VarInt
+
  | Int
  | The damage value (map ID) of the map being modified
+
  | The player's Entity ID (EID)
 
  |-
 
  |-
  |colspan="2"| Scale
+
  | Is hardcore
|colspan="2"| Byte
+
  | Boolean
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
+
  |
|-
 
|colspan="2"| Tracking Position
 
  |colspan="2"| Boolean
 
  | Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
 
  |-
 
  |-
  |rowspan="5"| Icon
+
  | Gamemode
  | Direction And Type
+
| Unsigned Byte
  |rowspan="5"| Array
+
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. {{change|Bit 3 (0x8) is the hardcore flag.}}
  | Byte
+
|- {{Added}}
  | 0xF0 = Type, 0x0F = Direction
+
  | 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.
 
  |-
 
  |-
  | X
+
  | Dimension
  | Byte
+
  | {{change|Int Enum|Identifier}}
|
+
  | {{change|-1: The Nether, 0: The Overworld, 1: The End|Valid dimensions are defined per dimension registry sent before this}}
|-
+
  |- {{Added}}
| Z
+
  | World Name
| Byte
+
  | Identifier
  |  
+
  | Name of the world being spawned into
|- style="background-color: #d9ead3;"
 
| Has Display Name
 
  | Boolean
 
|
 
|- style="background-color: #d9ead3;"
 
  | Display Name
 
  | Optional [[Chat]]
 
  | Only present if previous Boolean is true
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
 
  |-
 
  |-
  |colspan="2"| Rows
+
  | Hashed seed
  |colspan="2"| Optional Byte
+
  | Long
  | Only if Columns is more than 0; number of rows updated
+
  | First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
  |colspan="2"| X
+
  | Max Players
  |colspan="2"| Optional Byte
+
| Unsigned Byte
  | Only if Columns is more than 0; x offset of the westernmost column
+
  | Was once used by the client to draw the player list, but now is ignored
 +
|- {{Removed}}
 +
| Level Type
 +
| String Enum (16)
 +
  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
 
  |-
 
  |-
  |colspan="2"| Z
+
  | View Distance
  |colspan="2"| Optional Byte
+
  | VarInt
  | Only if Columns is more than 0; z offset of the northernmost row
+
  | Render distance (2-32)
 
  |-
 
  |-
  |colspan="2"| Length
+
  | Reduced Debug Info
  |colspan="2"| Optional VarInt
+
  | Boolean
  | Only if Columns is more than 0; length of the following array
+
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
  |-
 
  |-
  |colspan="2"| Data
+
  | Enable respawn screen
  |colspan="2"| Optional Array of Unsigned Byte
+
| Boolean
  | Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
+
| 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
 
  |}
 
  |}
  
For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
+
{{Need Info|The format has changed in 20w28a}}
 +
 
 +
Example of Dimension codec CompoundTag sent by the server:
 +
    ListTag (Type: CompoundTag) "dimension":
 +
        CompoundTag:
 +
            StringTag "name" value: 'minecraft:overworld'
 +
            ByteTag "natural": 1
 +
            Some more attributes ...
  
Types are based off of rows and columns in <code>map_icons.png</code>:
+
Known attributes :
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Name
 +
! Type
 +
!style="width: 250px;" colspan="2"| Meaning
 +
! Values
 
  |-
 
  |-
  ! Icon type
+
  | name
  ! Result
+
  | String
 +
|colspan="2"| Dimension's name
 +
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
 
  |-
 
  |-
  | 0
+
  | natural
  | White arrow (players)
+
| Byte
 +
|colspan="2"| Is it a standard overworld like dimension
 +
  | 1: true, 0: false
 
  |-
 
  |-
  | 1
+
  | ambient_light
  | Green arrow (item frames)
+
| Float
 +
|colspan="2"| Ambient light
 +
  | 0.0 to 1.0
 
  |-
 
  |-
  | 2
+
  | has_ceiling
  | Red arrow
+
| Byte
 +
|colspan="2"| Does the dimension have blocks on top ? Like the nether
 +
  | 1: true, 0: false
 
  |-
 
  |-
  | 3
+
  | has_skylight
  | Blue arrow
+
  | Byte
 +
|colspan="2"| Does the dimension have natural sky light
 +
| 1: true, 0: false
 
  |-
 
  |-
  | 4
+
  | fixed_time
  | White cross
+
  | Long
 +
|colspan="2"| Set fixed minecraft clock time
 +
| 0 to 12000
 
  |-
 
  |-
  | 5
+
  | shrunk
  | Red pointer
+
  | Byte
 +
|colspan="2"| Used to set how Cords are scaled for the dimension.
 +
| 1: true, 0: false
 
  |-
 
  |-
  | 6
+
  | ultrawarm
  | White circle (off-map players)
+
  | Byte
 +
|colspan="2"| Sets if Ice and Water evaporate. (Like in the nether)
 +
| 1: true, 0: false
 
  |-
 
  |-
  | 7
+
  | has_raids
  | Small white circle (far-off-map players)
+
  | Byte
 +
|colspan="2"| ?
 +
| 1: true, 0: false
 
  |-
 
  |-
  | 8
+
  | respawn_anchor_works
  | Mansion
+
  | Byte
 +
|colspan="2"| Wether or not respawn anchor can be used
 +
| 1: true, 0: false
 
  |-
 
  |-
  | 9
+
  | bed_works
  | Temple
+
  | Byte
  |- style="background-color: #d9ead3;"
+
  |colspan="2"| Wether or not beds can be used
| 10
+
  | 1: true, 0: false
| White Banner
 
  |- style="background-color: #d9ead3;"
 
| 11
 
| Orange Banner
 
|- style="background-color: #d9ead3;"
 
| 12
 
| Magenta Banner
 
|- style="background-color: #d9ead3;"
 
| 13
 
| Light Blue Banner
 
|- style="background-color: #d9ead3;"
 
| 14
 
| Yellow Banner
 
|- style="background-color: #d9ead3;"
 
| 15
 
| Lime Banner
 
|- style="background-color: #d9ead3;"
 
| 16
 
| Pink Banner
 
|- style="background-color: #d9ead3;"
 
| 17
 
| Gray Banner
 
|- style="background-color: #d9ead3;"
 
| 18
 
| Light Gray Banner
 
|- style="background-color: #d9ead3;"
 
| 19
 
| Cyan Banner
 
|- style="background-color: #d9ead3;"
 
| 20
 
| Purple Banner
 
|- style="background-color: #d9ead3;"
 
| 21
 
| Blue Banner
 
|- style="background-color: #d9ead3;"
 
| 22
 
| Brown Banner
 
|- style="background-color: #d9ead3;"
 
| 23
 
| Green Banner
 
|- style="background-color: #d9ead3;"
 
| 24
 
| Red Banner
 
|- style="background-color: #d9ead3;"
 
| 25
 
| Black Banner
 
|- style="background-color: #d9ead3;"
 
| 26
 
| Treasure marker
 
|}
 
 
 
==== Craft Recipe Response ====
 
 
 
Response to the serverbound packet ([[#Craft Recipe Request|Craft Recipe Request]]), with the same recipe ID.  Appears to be used to notify the UI.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="2"| {{Change|0x2B|0x2C}}
+
  | piglin_safe
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Window ID
 
 
  | Byte
 
  | Byte
  |
+
  |colspan="2"| ?
 +
| 1: true, 0: false
 
  |-
 
  |-
  | Recipe
+
  | logical_height
  | {{Change|VarInt|Identifer}}
+
  | Int
  | A recipe ID
+
  |colspan="2"| Maybe the world's max height in blocks ?
|}
+
  | 0-256
 
 
==== Face Player ====
 
 
 
Used to rotate the client player to face the given location or entity (for <code>/teleport [<targets>] <x> <y> <z> facing</code>).
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="8"| 0x30
+
  | infiniburn
  |rowspan="8"| Play
+
| String
  |rowspan="8"| Client
+
  |colspan="2"| ?
|-
+
  | "" or minecraft resource "minecraft:..."
| Feet/eyes
 
| VarInt enum
 
| Values are feet=0, eyes=1. If set to eyes, aims using the head position; otherwise aims using the feet position.
 
|-
 
| Target x
 
| Double
 
| x coordinate of the point to face towards
 
|-
 
| Target y
 
| Double
 
| y coordinate of the point to face towards
 
|-
 
| Target z
 
| Double
 
| z coordinate of the point to face towards
 
|-
 
| Is entity
 
| Boolean
 
| If true, additional information about an entity is provided.
 
|-
 
| Entity ID
 
| Optional VarInt
 
| Only if is entity is true &mdash; the entity to face towards
 
|-
 
| Entity feet/eyes
 
| Optional VarInt enum
 
| Whether to look at the entity's eyes or feet.  Same values and meanings as before, just for the entity's head/feet.
 
 
  |}
 
  |}
 
If the entity given by entity ID cannot be found, this packet should be treated as if is entity was false.
 
  
 
==== Unlock Recipes ====
 
==== Unlock Recipes ====
Line 2,485: Line 755:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="10"| {{Change|0x31|0x33}}
+
  |rowspan="14"| {{Change|0x37|0x35}}
  |rowspan="10"| Play
+
  |rowspan="14"| Play
  |rowspan="10"| Client
+
  |rowspan="14"| Client
 
  |-
 
  |-
 
  | Action
 
  | Action
Line 2,506: Line 776:
 
  |-
 
  |-
 
  | Smelting Recipe Book Filter Active
 
  | Smelting Recipe Book Filter Active
 +
| 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
 
  | Boolean
 
  | If true, then the filtering option is active when the players opens its inventory.
 
  | If true, then the filtering option is active when the players opens its inventory.
Line 2,514: Line 800:
 
  |-
 
  |-
 
  | Recipe IDs
 
  | Recipe IDs
  | Array of {{Change|VarInt|Identifier}}
+
  | Array of Identifier
 
  |
 
  |
 
  |-
 
  |-
Line 2,522: Line 808:
 
  |-
 
  |-
 
  | Recipe IDs
 
  | Recipe IDs
  | Optional Array of {{Change|VarInt|Identifier}}, only present if mode is 0 (init)
+
  | Optional Array of Identifier, only present if mode is 0 (init)
 
  |
 
  |
 
  |}
 
  |}
 
Action:
 
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. VERIFY LIST ORDER?
+
* 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.
 
* 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.
 
* 2 (remove) = Remove all the recipes in the list. This allows them to re-displayed when they are readded.
  
==== Scoreboard Objective ====
+
==== Respawn ====
  
This is sent to the client when it should create a new {{Minecraft Wiki|scoreboard}} objective or remove one.
+
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"
 
{| class="wikitable"
Line 2,542: Line 828:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x42|0x44}}
+
|rowspan="10"| {{Change|0x3B|0x39}}
 +
|rowspan="10"| Play
 +
|rowspan="10"| Client
 +
| Dimension
 +
| {{change|Int Enum|Identifier}}
 +
| {{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.
 +
|}
 +
 
 +
{{Need Info|Does the new World Name field resolve this same-dimension issue?}}
 +
 
 +
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
 +
 
 +
If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
 +
 
 +
==== Multi Block Change ====
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
  |rowspan="4"| {{Change|0x10|0x3B}}
 
  |rowspan="4"| Play
 
  |rowspan="4"| Play
 
  |rowspan="4"| Client
 
  |rowspan="4"| Client
  | Objective Name
+
  |
  | String (16)
+
  | Long
  | An unique name for the objective
+
| Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right)
 +
  |- {{added}}
 +
|
 +
| Boolean
 +
|
 
  |-
 
  |-
  | Mode
+
  | Array size
  | Byte
+
  | VarInt
  | 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text.
+
  | Number of elements in the following array
 
  |-
 
  |-
  | Objective Value
+
  |  
  | Optional String (32)
+
  | Array of VarLong
  | Only if mode is 0 or 2. The text to be displayed for the score
+
  | 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).
|-
 
| Type
 
| Optional {{change|String|VarInt Enum}}
 
| Only if mode is 0 or 2. {{change|“integer” or “hearts”|0 = "integer", 1 = "hearts"}}
 
 
  |}
 
  |}
  
==== Teams ====
+
==== Entity Properties ====
  
Creates and updates teams.
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,571: Line 913:
 
  ! Bound To
 
  ! Bound To
 
  !colspan="2"| Field Name
 
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="23"| {{Change|0x44|0x46}}
+
  |rowspan="6"| {{change|0x59|0x58}}
  |rowspan="23"| Play
+
  |rowspan="6"| Play
  |rowspan="23"| Client
+
  |rowspan="6"| Client
  |colspan="2"| Team Name
+
  |colspan="2"| Entity ID
| String (16)
+
  |colspan="2"| VarInt
| A unique name for the team. (Shared with scoreboard).
 
|-
 
  |colspan="2"| Mode
 
| Byte
 
| Determines the layout of the remaining packet
 
|-
 
|rowspan="9"| 0: create team
 
| Team Display Name
 
| String (32)
 
 
  |  
 
  |  
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Team Prefix
 
| String (16)
 
| Displayed before the names of players that are part of this team
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Team Suffix
 
| String (16)
 
| Displayed after the names of players that are part of this team
 
 
  |-
 
  |-
  | Friendly Flags
+
  |colspan="2"| Number Of Properties
  | Byte
+
  |colspan="2"| Int
  | Bit mask. 0x01: Allow friendly fire, 0x02: can see invisible players on same team
+
  | Number of elements in the following array
 
  |-
 
  |-
  | Name Tag Visibility
+
  |rowspan="4"| Property
  | String Enum (32)
+
| Key
  | <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>
+
|rowspan="4"| Array
 +
  | {{Change|String (64)|Identifier}}
 +
  | See below
 
  |-
 
  |-
  | Collision Rule
+
  | Value
  | String Enum (32)
+
  | Double
  | <code>always</code>, <code>pushOtherTeams</code>, <code>pushOwnTeam</code>, <code>never</code>
+
  | See below
 
  |-
 
  |-
  | {{change|Color|Formatting}}
+
  | Number Of Modifiers
| {{Change|Byte|VarInt enum}}
 
| {{change|For colors, the same [[Chat]] colors (0-15). -1 indicates RESET/no color.|See below for more info.}}
 
|-
 
| Entity Count
 
 
  | VarInt
 
  | VarInt
 
  | Number of elements in the following array
 
  | Number of elements in the following array
 
  |-
 
  |-
  | Entities
+
  | Modifiers
  | Array of String (40)
+
  | Array of Modifier Data
  | Identifiers for the entities in this teamFor players, this is their username; for other entities, it is their UUID.
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 +
  |}
 +
 
 +
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 +
 
 +
{| class="wikitable"
 
  |-
 
  |-
  | 1: remove team
+
  ! Key
  | ''no fields''
+
  ! Default
  | ''no fields''
+
  ! Min
  |
+
  ! Max
 +
! Label
 
  |-
 
  |-
  |rowspan="7"| 2: update team info
+
  | {{change|generic.maxHealth|generic.max_health}}
| Team Display Name
+
  | 20.0
| String (32)
+
  | 0.0
|
+
  | 1024.0
|- style="background-color: #f4cccc; text-decoration: line-through;"
+
  | Max Health
| Team Prefix
 
| String (16)
 
| Displayed before the names of entities that are part of this team
 
  |- style="background-color: #f4cccc; text-decoration: line-through;"
 
  | Team Suffix
 
  | String (16)
 
  | Displayed after the names of entities that are part of this team
 
 
  |-
 
  |-
  | Friendly Flags
+
  | {{change|generic.followRange|generic.follow_range}}
  | Byte
+
| 32.0
  | Bit mask. 0x01: Allow friendly fire, 0x02: can see invisible entities on same team
+
  | 0.0
 +
  | 2048.0
 +
| Follow Range
 
  |-
 
  |-
  | Name Tag Visibility
+
  | {{change|generic.knockbackResistance|generic.knockback_resistance}}
  | String Enum (32)
+
| 0.0
  | <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>
+
| 0.0
 +
  | 1.0
 +
  | Knockback Resistance
 
  |-
 
  |-
  | Collision Rule
+
  | {{change|generic.movementSpeed|generic.movement_speed}}
  | String Enum (32)
+
| 0.7
  | <code>always</code>, <code>pushOtherTeams</code>, <code>pushOwnTeam</code>, <code>never</code>
+
| 0.0
 +
  | 1024.0
 +
  | Movement Speed
 
  |-
 
  |-
  | {{change|Color|Formatting}}
+
  | {{change|generic.attackDamage|generic.attack_damage}}
  | {{Change|Byte|VarInt enum}}
+
  | 2.0
  | {{change|For colors, the same [[Chat]] colors (0-15). -1 indicates RESET/no color.|See below for more info.}}
+
  | 0.0
 +
| 2048.0
 +
| Attack Damage
 
  |-
 
  |-
  |rowspan="2"| 3: add players to team
+
  | {{change|generic.attackSpeed|generic.attack_speed}}
  | Entity Count
+
| 4.0
  | VarInt
+
  | 0.0
  | Number of elements in the following array
+
  | 1024.0
 +
  | Attack Speed
 
  |-
 
  |-
  | Entities
+
  | {{change|generic.flyingSpeed|generic.flying_speed}}
  | Array of String (40)
+
  | 0.4
  | Identifiers for the entities addedFor players, this is their username; for other entities, it is their UUID.
+
  | 0.0
 +
  | 1024.0
 +
| Flying Speed
 
  |-
 
  |-
  |rowspan="2"| 4: remove players from team
+
  | generic.armor
  | Entity Count
+
| 0.0
  | VarInt
+
  | 0.0
  | Number of elements in the following array
+
  | 30.0
 +
  | Armor
 
  |-
 
  |-
  | Entities
+
  | {{change|generic.armorToughness|generic.armor_toughness}}
  | Array of String (40)
+
  | 0.0
  | Identifiers for the entities removed.  For players, this is their username; for other entities, it is their UUID.
+
  | 0.0
  |}
+
  | 20.0
 
+
| Armor Toughness
Formatting: The formatting of a team defines how the names of the team members are visualized. The following table lists all the possible formattings.
 
 
 
{| class="wikitable"
 
! ID
 
! Formatting
 
 
  |-
 
  |-
  | 0-15
+
| {{change|generic.attackKnockback|generic.attack_knockback}}
  | Color formatting, same values as [[Chat]] colors.
+
  | 0.0
 +
  | 0.0
 +
| 5.0
 +
| &mdash;
 
  |-
 
  |-
  | 16
+
  | generic.luck
  | Obfuscated
+
  | 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck
 
  |-
 
  |-
  | 17
+
  | {{change|horse.jumpStrength|horse.jump_strength}}
  | Bold
+
| 0.7
 +
| 0.0
 +
| 2.0
 +
  | Jump Strength
 
  |-
 
  |-
  | 18
+
  | {{change|zombie.spawnReinforcements|zombie.spawn_reinforcements}}
  | Strikethrough
+
| 0.0
 +
| 0.0
 +
| 1.0
 +
  | Spawn Reinforcements Chance
 
  |-
 
  |-
  | 19
+
  | generic.reachDistance
  | Underlined
+
  | 5.0
 +
| 0.0
 +
| 1024.0
 +
| Player Reach Distance (Forge only)
 
  |-
 
  |-
  | 20
+
  | forge.swimSpeed
  | Italic
+
  | 1.0
  |-
+
  | 0.0
  | 21
+
  | 1024.0
  | Reset
+
  | Swimming Speed (Forge only)
 
  |}
 
  |}
  
==== Stop Sound ====
+
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.
 +
 
 +
''Modifier Data'' structure:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Packet ID
+
  |-
! State
 
! Bound To
 
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x4B
+
  | UUID
|rowspan="7"| Play
+
  | UUID
|rowspan="7"| Client
+
  |  
| Flags
 
  | Byte
 
  | Controls which fields are present.
 
 
  |-
 
  |-
  | Source
+
  | Amount
  | Optional VarInt enum
+
  | Double
  | Only if flags is 3 or 1 (bit mask 0x1).  See below.  If not present, then sounds from all sources are cleared.
+
  | May be positive or negative
 
  |-
 
  |-
  | Sound
+
  | Operation
  | Optional Identifier
+
  | Byte
  | Only if flags is 2 or 3 (bit mask 0x2).  A sound effect name, see [[#Named Sound Effect|Named Sound Effect]].  If not present, then all sounds are cleared.
+
  | See below
 
  |}
 
  |}
  
Categories:
+
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
  
{| class="wikitable"
+
All of the 0's are applied first, and then the 1's, and then the 2's.
! Name !! Value
 
|-
 
| master || 0
 
|-
 
| music || 1
 
|-
 
| record || 2
 
|-
 
| weather || 3
 
|-
 
| block || 4
 
|-
 
| hostile || 5
 
|-
 
| neutral || 6
 
|-
 
| player || 7
 
|-
 
| ambient || 8
 
|-
 
| voice || 9
 
|}
 
  
 
==== Declare Recipes ====
 
==== Declare Recipes ====
Line 2,765: Line 1,088:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x53
+
  |rowspan="4"| {{change|0x5B|0x5A}}
 
  |rowspan="4"| Play
 
  |rowspan="4"| Play
 
  |rowspan="4"| Client
 
  |rowspan="4"| Client
Line 2,850: Line 1,173:
 
  | <code>crafting_special_armordye</code>
 
  | <code>crafting_special_armordye</code>
 
  | Recipe for dying leather armor
 
  | Recipe for dying leather armor
  | None
+
  |rowspan="13"| None
 
  |-
 
  |-
 
  | <code>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>crafting_special_mapcloning</code>
 
  | <code>crafting_special_mapcloning</code>
 
  | Recipe for copying maps
 
  | Recipe for copying maps
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_mapextending</code>
 
  | <code>crafting_special_mapextending</code>
 
  | Recipe for adding paper to maps
 
  | Recipe for adding paper to maps
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_firework_rocket</code>
 
  | <code>crafting_special_firework_rocket</code>
 
  | Recipe for making firework rockets
 
  | Recipe for making firework rockets
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_firework_star</code>
 
  | <code>crafting_special_firework_star</code>
 
  | Recipe for making firework stars
 
  | Recipe for making firework stars
| None
 
 
  |-
 
  |-
 
  | <code>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>crafting_special_repairitem</code>
 
  | <code>crafting_special_repairitem</code>
 
  | Recipe for repairing items via crafting
 
  | Recipe for repairing items via crafting
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_tippedarrow</code>
 
  | <code>crafting_special_tippedarrow</code>
 
  | Recipe for crafting tipped arrows
 
  | Recipe for crafting tipped arrows
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_bannerduplicate</code>
 
  | <code>crafting_special_bannerduplicate</code>
 
  | Recipe for copying banner patterns
 
  | Recipe for copying banner patterns
| None
 
 
  |-
 
  |-
 
  | <code>crafting_special_banneraddpattern</code>
 
  | <code>crafting_special_banneraddpattern</code>
 
  | Recipe for adding patterns to banners
 
  | Recipe for adding patterns to banners
| None
 
 
  |-
 
  |-
 
  | <code>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>crafting_special_shulkerboxcoloring</code>
 
  | <code>crafting_special_shulkerboxcoloring</code>
 
  | Recipe for recoloring a shulker box
 
  | Recipe for recoloring a shulker box
  | None
+
  |-
 +
| <code>smelting</code>
 +
| Smelting recipe
 +
|rowspan="4"| As follows:
 +
  {| class="wikitable"
 +
    ! Name
 +
    ! Type
 +
    ! Description
 +
    |-
 +
    | Group
 +
    | String
 +
    | Used to group similar recipes together in the recipe book.
 +
    |-
 +
    | Ingredient
 +
    | Ingredient
 +
    |
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |-
 +
    | Experience
 +
    | Float
 +
    |
 +
    |-
 +
    | Cooking time
 +
    | VarInt
 +
    |
 +
    |}
 +
|-
 +
| <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}}
 +
| <code>smithing</code>
 +
| Smithing table recipe
 +
| As follows:
 +
  {| class="wikitable"
 +
    ! Name
 +
    ! Type
 +
    ! Description
 +
    |-
 +
    | Base
 +
    | Ingredient
 +
    | First item
 +
    |-
 +
    | Addition
 +
    | Ingredient
 +
    | Second item
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 
  |}
 
  |}
  
Line 2,917: Line 1,308:
 
  |}
 
  |}
  
==== Tags ====
+
=== Serverbound ===
  
{{Warning|This packet MUST be send TWICE, even if it's empty, not doing so can crash the client (e.g. when clicking a fuel slot in a furnace). The packet should also be send two times, this is to prevent the client from crashing.}}
+
==== 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|Creative Inventory Action]] packet instead.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,929: Line 1,326:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x54
+
  |rowspan="7"| 0x0E
  |rowspan="2"| Play
+
  |rowspan="7"| Play
  |rowspan="2"| Client
+
  |rowspan="7"| Server
  | Block Tags
+
| Entity ID
  | (See below)
+
| VarInt
  | IDs are block IDs
+
| 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
 
  |-
 
  |-
  | Item Tags
+
  | Hand
  | (See below)
+
  | Optional VarInt Enum
  | IDs are item IDs
+
  | Only if Type is interact or interact at; 0: main hand, 1: off hand
 +
|- {{Added}}
 +
| Sneaking
 +
| Boolean
 +
| If the client is sneaking.
 
  |}
 
  |}
  
Tags look like:
+
==== Generate Structure ====
 +
 
 +
Sent when Generate is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
  !colspan="2"| Field Name
+
! Packet ID
  !colspan="2"| Field Type
+
! State
 +
! Bound To
 +
  ! Field Name
 +
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |colspan="2"| Length
+
  |rowspan="3"| 0x0F
  |colspan="2"| VarInt
+
  |rowspan="3"| Play
| Number of elements in the following array
+
  |rowspan="3"| Server
|-
+
  | Location
  |rowspan="3"| Tags
+
  | Position
  | Tag name
+
  | Block entity location
|rowspan="3"| Array
 
  | Identifier
 
  |
 
 
  |-
 
  |-
  | Count
+
  | Levels
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | Value of the levels slider/max depth to generate
 
  |-
 
  |-
  | Entries
+
  | Keep Jigsaws
  | Array of VarInt
+
  | Boolean
  | Numeric ID of the block/item.
+
  |
 
  |}
 
  |}
  
=== Serverbound ===
+
==== Player Abilities (serverbound) ====
  
==== Tab-Complete (serverbound) ====
+
{{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.}}
  
Sent when the client needs to tab-complete a <code>minecraft:ask_server</code> suggestion type.
+
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"
 
{| class="wikitable"
Line 2,981: Line 1,400:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x01|0x04}}
+
  |rowspan="3"| {{change|0x19|0x1A}}
  |rowspan="5"| Play
+
  |rowspan="3"| Play
  |rowspan="5"| Server
+
  |rowspan="3"| Server
  |style="background-color: #d9ead3;"| Transaction Id
+
  | Flags
  |style="background-color: #d9ead3;"| VarInt
+
  | Byte
  |style="background-color: #d9ead3;"| The id received in the tab completion request packet, must match or the client will ignore this packet. Client generates this and increments it each time it sends another tab completion that doesn't get a response.
+
  | Bit mask. {{change|0x08: damage disabled (god mode), 0x04: can fly, }}0x02: is flying{{change|, 0x01: is Creative}}
|-
+
  |- {{removed}}
| Text
+
  | Flying Speed
| String ({{change|32767|256}})
+
  | Float
  | All text behind the cursor without the <code>/</code> (e.g. to the left of the cursor in left-to-right languages like English)
+
  |  
  |- style="background-color: #f4cccc; text-decoration: line-through;"
+
  |- {{removed}}
  | Assume Command
+
  | Walking Speed
  | Boolean
+
  | Float
| If true, the server will parse Text as a command even if it doesn't start with a <code>/</code>. Used in the command block GUI.
 
  |- style="background-color: #f4cccc; text-decoration: line-through;"
 
  | Has Position
 
  | Boolean
 
 
  |  
 
  |  
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Looked At Block
 
| Optional Position
 
| The position of the block being looked at. Only sent if Has Position is true.
 
 
  |}
 
  |}
  
==== Craft Recipe Request ====
+
==== Set Displayed Recipe ====
  
A replacement for [[Protocol#Prepare Crafting Grid|Prepare Crafting Grid]].  It appears to behave more or less the same, but the client does not specify where to move the items.
+
Replaces Recipe Book Data, type 0.
  
This packet is sent when a player clicks a recipe in the crafting book that is craftable (white border).
+
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="1"| 0x1E
 +
|rowspan="1"| Play
 +
|rowspan="1"| Server
 +
| Recipe ID
 +
| Identifier
 +
|
 +
|}
  
{| class="wikitable"
+
==== Set Recipe Book State ====
 +
 
 +
Replaces Recipe Book Data, type 1.
 +
 
 +
{| class="wikitable" {{Added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 3,019: Line 1,448:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x12
+
  |rowspan="3"| 0x1F
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
 
  |rowspan="3"| Server
 
  |rowspan="3"| Server
  | Window ID
+
  | Book ID
  | Byte
+
  | VarInt enum
 +
| 0: crafting, 1: furnace, 2: blast furnace, 3: smoker
 +
|-
 +
| Book Open
 +
| Boolean
 
  |
 
  |
 
  |-
 
  |-
  | Recipe
+
  | Filter Active
| {{Change|VarInt|Identifier}}
 
| A recipe ID
 
|-
 
| Make all
 
 
  | Boolean
 
  | Boolean
  | Affects the amount of items processed; true if shift is down when clicked
+
  |
 
  |}
 
  |}
  
==== Recipe Book Data ====
+
==== Update Jigsaw Block ====
(previously known as Crafting Book Data)
+
 
 +
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 3,042: Line 1,472:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x17
+
  |rowspan="7"| {{Change|0x27|0x28}}
 
  |rowspan="7"| Play
 
  |rowspan="7"| Play
 
  |rowspan="7"| Server
 
  |rowspan="7"| Server
  |colspan="2"| Type
+
  | Location
  | VarInt
+
| Position
  | Determines the format of the rest of the packet
+
| Block entity location
 +
|- {{Removed}}
 +
| Attachment type
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Name
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Target
 +
| Identifier
 +
|
 +
|-
 +
| {{Change|Target pool|Pool}}
 +
  | Identifier
 +
  |  
 
  |-
 
  |-
  ! Type
+
| Final state
  ! Field Name
+
| String
  !  
+
| "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>
 +
|}
 +
 
 +
==== Entity Equipment ====
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
  ! Bound To
 +
  !colspan="2"| Field Name
 +
  !colspan="2"| Field Type
 +
  ! Notes
 
  |-
 
  |-
  | 0: Displayed Recipe
+
  |rowspan="5"| 0x47
  | Recipe ID
+
|rowspan="5"| Play
  | Int
+
|rowspan="5"| Client
  | The internal id of the displayed recipe.
+
|colspan="2"| Entity ID
 +
|colspan="2"| VarInt
 +
| Entity's EID
 +
|- {{Removed}}
 +
|colspan="2"| Slot
 +
|colspan="2"| VarInt Enum
 +
| 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]]
 +
  |  
 
  |-
 
  |-
  |rowspan="4"| 1: Recipe Book States
+
  |rowspan="2"| Equipment
  | Crafting Recipe Book Open
+
  | Slot
  | Boolean
+
  |rowspan="2"| Array
  | Whether the player has the crafting recipe book currently openened/active.
+
  | 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.
 
  |-
 
  |-
  | Crafting Recipe Filter Active
+
  | Item
  | Boolean
+
  | [[Slot Data|Slot]]
| Whether the player has the crafting recipe book filter option currently active.
+
  |
|- style="background-color: #d9ead3;"
 
| Smelting Recipe Book Open
 
| Boolean
 
| Whether the player has the smelting recipe book currently openened/active.
 
|- style="background-color: #d9ead3;"
 
| Smelting Recipe Filter Active
 
| Boolean
 
  | Whether the player has the smelting recipe book filter option currently active.
 
 
  |}
 
  |}
 
The Recipe Book Status type is send when one of the states changes.
 
  
 
== Handshaking ==
 
== Handshaking ==
Line 3,108: Line 1,569:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|340|372}})
+
  | See [[protocol version numbers]] (currently {{change|578|748}})
 
  |-
 
  |-
 
  | 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 3,137: Line 1,598:
 
=== 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 17:52, 6 August 2020

This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 1.16.2-pre3, protocol 748). 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.

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 Identifier -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 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:
The format has changed in 20w28a

Example of Dimension codec CompoundTag sent by the server:

   ListTag (Type: CompoundTag) "dimension":
       CompoundTag: 
           StringTag "name" value: 'minecraft:overworld'
           ByteTag "natural": 1
           Some more attributes ...

Known attributes :

Name Type Meaning Values
name String Dimension's name "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
natural Byte Is it a standard overworld like dimension 1: true, 0: false
ambient_light Float Ambient light 0.0 to 1.0
has_ceiling Byte Does the dimension have blocks on top ? Like the nether 1: true, 0: false
has_skylight Byte Does the dimension have natural sky light 1: true, 0: false
fixed_time Long Set fixed minecraft clock time 0 to 12000
shrunk Byte Used to set how Cords are scaled for the dimension. 1: true, 0: false
ultrawarm Byte Sets if Ice and Water evaporate. (Like in the nether) 1: true, 0: false
has_raids Byte ? 1: true, 0: false
respawn_anchor_works Byte Wether or not respawn anchor can be used 1: true, 0: false
bed_works Byte Wether or not beds can be used 1: true, 0: false
piglin_safe Byte ? 1: true, 0: false
logical_height Int Maybe the world's max height in blocks ? 0-256
infiniburn String ? "" or minecraft resource "minecraft:..."

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 Identifier -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
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 578 748)
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.