Difference between revisions of "Pre-release protocol"

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(→‎Entity Metadata Format: New entity metadata)
(hostname srv behavior was reverted in 1.17.1-pre1)
 
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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|18w15a, protocol 371]]). 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|1.16.5, protocol 754]]) to the current pre-release (currently [[Protocol version numbers|1.17-rc2, protocol {{Snapshot PVN|1073741859}}]]). 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 ====
+
No changes so far.
 
 
===== 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 assignment.  One 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 22: Line 17:
 
  ! Packet name
 
  ! Packet name
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
|-
 
!colspan="4"| Handshaking serverbound
 
{{PacketList|0x00|Handshake}}
 
 
  |-
 
  |-
 
!colspan="4"| Play clientbound
 
!colspan="4"| Play clientbound
{{PacketList|0x04|Spawn Painting}}
+
{{PacketList|0x05|Sculk Vibration Signal|rel=added}}
{{PacketList|0x07|Statistics}}
+
{{PacketList|{{change|0x05|0x06}}|Entity Animation (clientbound)|pre=unchanged}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x06|0x07}}|Statistics|pre=unchanged}}
{{PacketList|0x0B|Block Change}}
+
{{PacketList|{{change|0x07|0x08}}|Acknowledge Player Digging|pre=unchanged}}
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
{{PacketList|{{change|0x10|0x0F}}|Multi Block Change}}
+
{{PacketList|{{change|0x09|0x0A}}|Block Entity Data|pre=unchanged}}
{{PacketList|{{change|0x0E|0x10}}|Tab-Complete (clientbound)}}
+
{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
{{PacketList|0x11|Declare Commands|rel=added}}
+
{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
{{PacketList|{{change|0x11|0x12}}|Confirm Transaction (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
 +
{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
 +
{{PacketList|0x10|Clear Titles|rel=added}}
 +
{{PacketList|{{change|0x0F|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x12}}|Declare Commands|pre=unchanged}}
 +
{{PacketList|0x11|Window Confirmation (clientbound)|pre=removed}}
 
{{PacketList|{{change|0x12|0x13}}|Close Window (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x12|0x13}}|Close Window (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x13|0x14}}|Open Window|pre=unchanged}}
+
{{PacketList|{{change|0x13|0x14}}|Window Items|pre=unchanged}}
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x15}}|Window Property|pre=unchanged}}
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x16}}|Set Slot|pre=unchanged}}
{{PacketList|{{change|0x16|0x17}}|Set Slot|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Plugin Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Named Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect}}
+
{{PacketList|{{change|0x19|0x1A}}|Disconnect (play)|pre=unchanged}}
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1B}}|Entity Status|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1C}}|Explosion}}
{{PacketList|{{change|0x1C|0x1D}}|Explosion|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1D}}|Unload Chunk|pre=unchanged}}
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x1D|0x1E}}|Change Game State|pre=unchanged}}
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x1F}}|Open Horse Window|pre=unchanged}}
{{PacketList|{{change|0x1F|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
+
{{PacketList|0x20|Initialize World Border|rel=added}}
{{PacketList|{{change|0x20|0x21}}|Chunk Data}}
+
{{PacketList|{{change|0x1F|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x21|0x22}}|Effect|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x22}}|Chunk Data}}
{{PacketList|{{change|0x22|0x23}}|Spawn Particle}}
+
{{PacketList|{{change|0x21|0x23}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x23|0x24}}|Join Game|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x24}}|Particle|pre=unchanged}}
{{PacketList|{{change|0x24|0x25}}|Map}}
+
{{PacketList|{{change|0x23|0x25}}|Update Light}}
{{PacketList|{{change|0x25|0x26}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x24|0x26}}|Join Game}}
{{PacketList|{{change|0x26|0x27}}|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x27}}|Map Data}}
{{PacketList|{{change|0x27|0x28}}|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x28}}|Trade List|pre=unchanged}}
{{PacketList|{{change|0x28|0x29}}|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x29}}|Entity Position|pre=unchanged}}
{{PacketList|{{change|0x29|0x2A}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x2A}}|Entity Position and Rotation|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2B}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x29|0x2B}}|Entity Rotation|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Craft Recipe Response}}
+
{{PacketList|0x2A|Entity Movement|pre=removed}}
{{PacketList|{{change|0x2C|0x2D}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2E}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2D}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x2E|0x2F}}|Player List Item|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2E}}|Open Window|pre=unchanged}}
{{PacketList|0x30|Face Player|rel=added}}
+
{{PacketList|{{change|0x2E|0x2F}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|0x30|Ping|rel=added}}
{{PacketList|{{change|0x30|0x32}}|Use Bed|pre=unchanged}}
+
{{PacketList|{{change|0x2F|0x31}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Unlock Recipes}}
+
{{PacketList|{{change|0x30|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|0x31|Combat Event|pre=removed}}
{{PacketList|{{change|0x33|0x35}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|0x33|End Combat Event|rel=added}}
{{PacketList|{{change|0x34|0x36}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|0x34|Enter Combat Event|rel=added}}
{{PacketList|{{change|0x35|0x37}}|Respawn|pre=unchanged}}
+
{{PacketList|0x35|Death Combat Event|rel=added}}
{{PacketList|{{change|0x36|0x38}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x32|0x36}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x37}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x38|0x3A}}|World Border|pre=unchanged}}
+
{{PacketList|0x36|Destroy Entities|pre=removed}}
{{PacketList|{{change|0x39|0x3B}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x38}}|Player Position And Look (clientbound)}}
{{PacketList|{{change|0x3A|0x3C}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x39}}|Unlock Recipes|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|Display Scoreboard|pre=unchanged}}
+
{{PacketList|0x3A|Destroy Entity|rel=added}}
{{PacketList|{{change|0x3C|0x3E}}|Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x3B}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x3D|0x3F}}|Attach Entity|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x3C}}|Resource Pack Send}}
{{PacketList|{{change|0x3E|0x40}}|Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x3D}}|Respawn|pre=unchanged}}
{{PacketList|{{change|0x3F|0x41}}|Entity Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x3E}}|Entity Head Look|pre=unchanged}}
{{PacketList|{{change|0x40|0x42}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x3F}}|Multi Block Change|pre=unchanged}}
{{PacketList|{{change|0x41|0x43}}|Update Health|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x40}}|Select Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x42|0x44}}|Scoreboard Objective}}
+
{{PacketList|0x41|Action Bar|rel=added}}
{{PacketList|{{change|0x43|0x45}}|Set Passengers|pre=unchanged}}
+
{{PacketList|0x42|World Border Center|rel=added}}
{{PacketList|{{change|0x44|0x46}}|Teams}}
+
{{PacketList|0x43|World Border Lerp Size|rel=added}}
{{PacketList|{{change|0x45|0x47}}|Update Score|pre=unchanged}}
+
{{PacketList|0x44|World Border Size |rel=added}}
{{PacketList|{{change|0x46|0x48}}|Spawn Position|pre=unchanged}}
+
{{PacketList|0x45|World Border Warning Delay|rel=added}}
{{PacketList|{{change|0x47|0x49}}|Time Update|pre=unchanged}}
+
{{PacketList|0x46|World Border Warning Reach|rel=added}}
{{PacketList|{{change|0x48|0x4A}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x3E|0x47}}|Camera|pre=unchanged}}
{{PacketList|0x4B|Stop Sound|rel=added}}
+
{{PacketList|{{change|0x3F|0x48}}|Held Item Change (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x49|0x4C}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x40|0x49}}|Update View Position|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4D}}|Player List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x4A}}|Update View Distance|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4E}}|Collect Item|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x4B}}|Spawn Position}}
{{PacketList|{{change|0x4C|0x4F}}|Entity Teleport|pre=unchanged}}
+
{{PacketList|{{change|0x43|0x4C}}|Display Scoreboard|pre=unchanged}}
{{PacketList|{{change|0x4D|0x50}}|Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x44|0x4D}}|Entity Metadata|pre=unchanged}}
{{PacketList|{{change|0x4E|0x51}}|Entity Properties|pre=unchanged}}
+
{{PacketList|{{change|0x45|0x4E}}|Attach Entity|pre=unchanged}}
{{PacketList|{{change|0x4F|0x52}}|Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x46|0x4F}}|Entity Velocity|pre=unchanged}}
{{PacketList|0x53|Declare Recipes|rel=added}}
+
{{PacketList|{{change|0x47|0x50}}|Entity Equipment|pre=unchanged}}
{{PacketList|0x54|Tags|rel=added}}
+
{{PacketList|0x4F|Title|pre=removed}}
 +
{{PacketList|{{change|0x48|0x51}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x52}}|Update Health|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x53}}|Scoreboard Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x54}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x55}}|Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x56}}|Update Score|pre=unchanged}}
 +
{{PacketList|0x57|Set Title SubTitle|rel=added}}
 +
{{PacketList|{{change|0x4E|0x58}}|Time Update|pre=unchanged}}
 +
{{PacketList|0x59|Set Title Text|rel=added}}
 +
{{PacketList|0x5A|Set Title Time|rel=added}}
 +
{{PacketList|{{change|0x50|0x5B}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x5C}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x5D}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x5E}}|Player List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x5F}}|NBT Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x60}}|Collect Item|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x61}}|Entity Teleport|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x62}}|Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x63}}|Entity Properties}}
 +
{{PacketList|{{change|0x59|0x64}}|Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x65}}|Declare Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x66}}|Tags}}
 
  |-
 
  |-
 
!colspan="4"| Play serverbound
 
!colspan="4"| Play serverbound
{{PacketList|{{change|0x02|0x01}}|Chat Message (serverbound)|pre=unchanged}}
+
{{PacketList|0x05|Client Settings}}
{{PacketList|{{change|0x03|0x02}}|Client Status|pre=unchanged}}
+
{{PacketList|0x07|Window Confirmation (serverbound)|pre=removed}}
{{PacketList|{{change|0x04|0x03}}|Client Settings|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x07}}|Click Window Button|pre=unchanged}}
{{PacketList|{{change|0x01|0x04}}|Tab-Complete (serverbound)}}
+
{{PacketList|{{change|0x09|0x08}}|Click Window}}
{{PacketList|0x12|Craft Recipe Request}}
+
{{PacketList|{{change|0x0A|0x09}}|Close Window (serverbound)|pre=unchanged}}
{{PacketList|0x17|Recipe Book Data}}
+
{{PacketList|{{change|0x0B|0x0A}}|Plugin Message (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x0C|0x0B}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x0D|0x0C}}|Query Entity NBT|pre=unchanged}}
 +
{{PacketList|{{change|0x0E|0x0D}}|Interact Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x0F|0x0E}}|Generate Structure|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x10}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x11}}|Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x12}}|Player Position And Rotation (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x13}}|Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x14}}|Player Movement|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x16}}|Steer Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x17}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x18}}|Craft Recipe Request|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1A}}|Player Digging|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1B}}|Entity Action|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1C}}|Steer Vehicle|pre=unchanged}}
 +
{{PacketList|0x1D|Pong|rel=added}}
 +
|-
 +
!colspan="4"| Handshaking serverbound
 +
{{PacketList|0x00|Handshake}}
 
  |}
 
  |}
  
 
== 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 ===
+
{{#vardefine:meta_prerelease|1}}
  
{| class="wikitable"
+
{{Warning2|Note that other entities have had metadata shifts due to these changes, not shown here.}}
! 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 ==
 
 
 
Note that entity metadata is a totally distinct concept from block metadata.  It is not required to send all metadata fields, or even any metadata fields, so long as the terminating entry is correctly sent.
 
 
 
Entity Metadata is an array of entries, each of which looks like the following:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Meaning
 
|-
 
| Index
 
| Unsigned Byte
 
| Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
 
|-
 
| Type
 
| Optional 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
 
|-
 
| 0
 
| Byte
 
|
 
|-
 
| 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
 
|
 
|-
 
| {{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 ===
 
=== Entity ===
  
The base class.
+
{{metadata inherit|Entity}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 505: Line 174:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="9"| 0
+
  |rowspan="9"| {{Metadata id|}}
 
  |rowspan="9"| Byte
 
  |rowspan="9"| Byte
 
  ! Bit mask
 
  ! Bit mask
Line 512: Line 181:
 
  |-
 
  |-
 
  | 0x01
 
  | 0x01
  | On Fire
+
  | Is on fire
 
  |-
 
  |-
 
  | 0x02
 
  | 0x02
  | Crouched
+
  | Is crouching
 
  |-
 
  |-
 
  | 0x04
 
  | 0x04
Line 521: Line 190:
 
  |-
 
  |-
 
  | 0x08
 
  | 0x08
  | Sprinting
+
  | Is sprinting
 
  |-
 
  |-
 
  | 0x10
 
  | 0x10
  | Unused (previously eating/drinking/blocking; use hand state now)
+
  | Is swimming
 
  |-
 
  |-
 
  | 0x20
 
  | 0x20
  | Invisible
+
  | Is invisible
 
  |-
 
  |-
 
  | 0x40
 
  | 0x40
  | Glowing effect
+
  | has glowing effect
 
  |-
 
  |-
 
  | 0x80
 
  | 0x80
  | Flying with {{Minecraft Wiki|elytra}}
+
  | Is flying with an {{Minecraft Wiki|elytra}}
 
  |-
 
  |-
  | 1
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
  |colspan="2"| Air
+
  |colspan="2"| Air ticks
 
  | 300
 
  | 300
 
  |-
 
  |-
| 2
+
  | {{Metadata id|}}
  | {{change|String|OptChat}}
+
| OptChat
 
  |colspan="2"| Custom name
 
  |colspan="2"| Custom name
 
  | empty
 
  | empty
 
  |-
 
  |-
  | 3
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
 
  |colspan="2"| Is custom name visible
 
  |colspan="2"| Is custom name visible
 
  | false
 
  | false
 
  |-
 
  |-
  | 4
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
 
  |colspan="2"| Is silent
 
  |colspan="2"| Is silent
 
  | false
 
  | false
 
  |-
 
  |-
  | 5
+
  | {{Metadata id|}}
| Boolean
 
|colspan="2"| No gravity
 
| false
 
|}
 
 
 
=== AreaEffectCloud ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| 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
 
|colspan="2"| Particle ID
 
| 15 (mobSpell)
 
|- 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
 
|}
 
 
 
=== Trident ===
 
 
 
Extends [[#Arrow|Arrow]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Loyalty level (enchantment)
 
| 0
 
|}
 
 
 
=== Boat ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| 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
 
|colspan="2"| Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak)
 
| 0
 
|-
 
| 10
 
| Boolean
 
|colspan="2"| Right paddle turning
 
| false
 
|-
 
| 11
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Left paddle turning
+
  |colspan="2"| Has no gravity
 
  | false
 
  | false
|- style="background-color: #d9ead3;"
 
| 12
 
| VarInt
 
|colspan="2"| Splash timer (?)
 
| 0
 
|}
 
 
=== Phantom ===
 
 
Extends [[#Flying|Flying]].
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
 +
| Pose
 +
|colspan="2"| Pose
 +
| STANDING
 +
|- {{added}}
 +
| {{Metadata id|added}}
 
  | VarInt
 
  | VarInt
  |colspan="2"| Size
+
  |colspan="2"| Ticks frozen in powdered snow
 
  | 0
 
  | 0
 
  |}
 
  |}
  
Hitbox size is determined by horizontal=0.9 + 0.2*size and vertical=0.5 + 0.1 * i
+
== Block Actions ==
  
=== Dolphin ===
+
No changes so far.
  
Extends [[#Creature|Creature]].
+
== Inventories ==
  
No additional metadata.
+
No changes so far.
  
=== WaterMob ===
+
== Plugin Channels ==
  
Extends {{Change|[[#Insentient|Insentient]]|[[#Creature|Creature]]}}.
+
No changes so far.
  
No additional metadata.
+
== Play ==
  
=== Abstract fish ===
+
=== Clientbound ===
  
Extends [[#WaterMob|WaterMob]].
+
==== Sculk Vibration Signal ====
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable" {{Added}}
  ! Index
+
! Packet ID
  ! Type
+
! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! Default
+
  ! Field Name
 +
  ! Field Type
 +
  ! Notes
 +
|-
 +
|rowspan="4"| 0x05
 +
|rowspan="4"| Play
 +
  |rowspan="4"| Client
 +
| Source Position
 +
| Position
 +
| Source position for the vibration.
 
  |-
 
  |-
  | 12
+
  | Destination Identifier
  | Boolean
+
  | Identifier
  |colspan="2"| From bucket
+
  | Identifier of the destination codec type.
| False
 
|}
 
 
 
=== Cod ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
No additional metadata.
 
 
 
=== Puffer fish ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
 
  |-
 
  |-
  | 13
+
  | Destination
  | VarInt
+
  | Varies
|colspan="2"| PuffState (varies from 0 to 2)
+
  | Vanilla default destinations are a block position encoded as a [https://wiki.vg/Protocol#Data_types Position] for "block" or an entity id encoded as a VarInt for "entity".
| 0
 
  |}
 
 
 
=== 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
+
  | Arrival Ticks
 
  | VarInt
 
  | VarInt
  |colspan="2"| Variant
+
  | Ticks for the signal to arrive at the destination.
| 0
 
 
  |}
 
  |}
 +
This packet shows a permanent particle.
  
=== Turtle ===
+
==== Clear Titles====
  
Extends [[#Animal|Animal]].
+
{| class="wikitable" {{Added}}
 
+
! Packet ID
{| class="wikitable" style="background-color: #d9ead3;"
+
! State
  ! Index
+
  ! Bound To
  ! Type
+
  ! Field Name
  !style="width: 250px;" colspan="2"| Meaning
+
  ! Field Type
  ! Default
+
  ! Notes
  |-
+
  |- {{ Added }}
  | 13
+
  |rowspan="4"| 0x10
| BlockPos
+
  |rowspan="4"| Play
  |colspan="2"| Home pos
+
  |rowspan="4"| Client
  | (0, 0, 0)
+
  |- {{ Added }}
  |-
+
  | Reset
  | 14
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Has egg
+
  |  
| false
 
 
  |-
 
  |-
| 15
 
| Boolean
 
|colspan="2"| Laying egg (?)
 
| false
 
|-
 
| 16
 
| BlockPos
 
|colspan="2"| Travel pos
 
| (0, 0, 0)
 
|-
 
| 17
 
| Boolean
 
|colspan="2"| Going home
 
| false
 
|-
 
| 18
 
| Boolean
 
|colspan="2"| Traveling
 
| false
 
 
  |}
 
  |}
  
=== Drowned ===
+
==== Explosion ====
  
Extends [[#Drowned|Drowned]].
+
Sent when an explosion occurs (creepers, TNT, and ghast fireballs).
  
{| class="wikitable" style="background-color: #d9ead3;"
+
Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| Boolean
 
|colspan="2"| Has target (?)
 
| false
 
|}
 
  
== Block Actions ==
+
{| class="wikitable"
 
+
! Packet ID
No changes so far.
+
! State
 
+
! Bound To
== Plugin Channels ==
+
  ! Field Name
 
+
  ! Field Type
=== <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
 
  ! Notes
 
  |-
 
  |-
  | Sound category
+
  |rowspan="9"| {{change|0x1B|0x1C}}
  | String
+
  |rowspan="9"| Play
  | 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.
+
  |rowspan="9"| Client
 +
| X
 +
| Float
 +
|  
 
  |-
 
  |-
  | Sound name
+
  | Y
  | String
+
  | Float
  | A [http://pokechu22.github.io/Burger/1.11.html#sounds sound effect name].  If left empty, ''all'' sounds are stopped.
+
  |  
|}
 
 
 
{{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||This plugin channel has been replaced by the [[#Stop sound|stop sound]] packet.}}
 
 
 
=== <code>MC|DebugCaves</code> ===
 
 
 
Never sent, but (presumably) used to debug caves.  Does not render without modifying the client.
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
!colspan="2"| Field name
 
!colspan="2"| Field type
 
! Notes
 
 
  |-
 
  |-
  |colspan="2"| Unknown 1
+
  | Z
|colspan="2"| Position
+
  | Float
|
+
  |  
|-
 
|colspan="2"| Count
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="2"| Data
 
| Unknown 2
 
|rowspan="2"| Array
 
  | Position
 
  |
 
 
  |-
 
  |-
  | Unknown 3
+
  | Strength
 
  | Float
 
  | Float
  |
+
  | A strength greater than or equal to 2.0 spawns a <code>minecraft:explosion_emitter</code> particle, while a lesser strength spawns a <code>minecraft:explosion</code> particle.
|}
 
 
 
=== <code>MC|DebugStructures</code> ===
 
 
 
Never sent, but (presumably) used to debug structures.  Does not render without modifying the client.
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
!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> ===
 
 
 
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
+
  | Record Count
  | Float
+
  | {{change|Int|VarInt}}
  |
+
  | Number of elements in the following array.
 
  |-
 
  |-
  | Unknown 3
+
  | Records
  | Float
+
  | Array of (Byte, Byte, Byte)
  |
+
  | Each record is 3 signed bytes long; the 3 bytes are the XYZ (respectively) signed offsets of affected blocks.
 
  |-
 
  |-
  | Unknown 4
+
  | Player Motion X
 
  | Float
 
  | Float
  |
+
  | X velocity of the player being pushed by the explosion.
 
  |-
 
  |-
  | Unknown 5
+
  | Player Motion Y
 
  | Float
 
  | Float
  |
+
  | Y velocity of the player being pushed by the explosion.
 
  |-
 
  |-
  | Unknown 6
+
  | Player Motion Z
 
  | Float
 
  | Float
  |
+
  | Z velocity of the player being pushed by the explosion.
 
  |}
 
  |}
  
== Play ==
+
==== Initialize World Border ====  
 
 
=== Clientbound ===
 
 
 
==== Spawn Painting ====
 
 
 
This packet shows location, name, and type of painting.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 987: Line 370:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{ Added }}
  |rowspan="5"| 0x04
+
  |rowspan="8"| 0x20
  |rowspan="5"| Play
+
  |rowspan="8"| Play
  |rowspan="5"| Client
+
  |rowspan="8"| Client
  | Entity ID
+
  | X
  | VarInt
+
  | Double
 
  |  
 
  |  
  |-
+
  |- {{ Added }}
  | Entity UUID
+
  | Z
  | UUID
+
  | Double
 
  |  
 
  |  
  |-
+
  |- {{ Added }}
  | Motive
+
  | Old Diameter
  | {{Change|String (13)|VarInt}}
+
| Double
  | {{Change|Name of the painting. Max length 13|Panting's ID, see below}}
+
| Current length of a single side of the world border, in meters.
  |-
+
  |- {{ Added }}
  | Location
+
| New Diameter
  | Position
+
| Double
  | Center coordinates (see below)
+
| Target length of a single side of the world border, in meters.
  |-
+
|- {{ Added }}
  | Direction
+
  | Speed
  | Byte Enum
+
| VarLong
  | Direction the painting faces (North = 2, South = 0, West = 1, East = 3)
+
| Number of real-time ''milli''seconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.
 +
|- {{ Added }}
 +
| Portal Teleport Boundary
 +
| VarInt
 +
| Resulting coordinates from a portal teleport are limited to ±value. Usually 29999984.
 +
  |- {{ Added }}
 +
  | Warning Blocks
 +
  | VarInt
 +
  | In meters.
 +
  |- {{ Added }}
 +
| Warning Time
 +
  | VarInt
 +
  | In seconds as set by <code>/worldborder warning time</code>.
 +
  |- {{ Added }}
 
  |}
 
  |}
  
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.
+
The Notchian client determines how solid to display the warning by comparing to whichever is higher, the warning distance or whichever is lower, the distance from the current diameter to the target diameter or the place the border will be after warningTime seconds. In pseudocode:
  
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):
+
<syntaxhighlight lang="java">
 +
distance = max(min(resizeSpeed * 1000 * warningTime, abs(targetDiameter - currentDiameter)), warningDistance);
 +
if (playerDistance < distance) {
 +
    warning = 1.0 - playerDistance / distance;
 +
} else {
 +
    warning = 0.0;
 +
}
 +
</syntaxhighlight>
  
{| class="wikitable"
+
==== Chunk Data ====
! Name
+
{{Main|Chunk Format}}
!style="background-color: #d9ead3;"| ID
+
{{See also|#Unload Chunk}}
! 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.
+
{{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)}}
  
==== Statistics ====
+
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimension 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).
 
 
Sent as a response to [[#Client_Status|Client Status]] (id 1).
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
  ! Bound To  
+
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
  !colspan="2"| Field Type
+
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| 0x07
+
  |rowspan="13"| {{change|0x20|0x22}}
  |rowspan="6"| Play
+
  |rowspan="13"| Play
  |rowspan="6"| Client
+
  |rowspan="13"| Client
  |colspan="2"| Count
+
  | Chunk X
  |colspan="2"| VarInt
+
  | Int
  | Number of elements in the following array
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  |rowspan="4"| Statistic
+
  | Chunk Z
  |style="background-color: #f4cccc; text-decoration: line-through;"| Name
+
| Int
  |rowspan="4"| Array
+
| Chunk coordinate (block coordinate divided by 16, rounded down)
  |style="background-color: #f4cccc; text-decoration: line-through;"| String (32767)
+
  |- {{removed}}
  |style="background-color: #f4cccc; text-decoration: line-through;"| [https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff]
+
  | Full chunk
  |- style="background-color: #d9ead3;"
+
  | Boolean
  | Category ID
+
  | See [[Chunk Format#Full chunk|Chunk Format]]
 +
  |- {{removed}}
 +
  | Primary Bit Mask
 
  | VarInt
 
  | VarInt
  | See below
+
  | 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).
  |- style="background-color: #d9ead3;"
+
  |- {{added}}
  | Statistic ID
+
  | Bit Mask Length
 
  | VarInt
 
  | VarInt
  | See below
+
  | Length of the following array
 +
|- {{added}}
 +
| Primary Bit Mask
 +
| Array of Long
 +
| BitSet with bits (world height in blocks / 16) 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 the lowest y to 15 blocks above).
 +
|-
 +
| 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.
 +
|-
 +
| Biomes length
 +
| {{change|Optional|}} VarInt
 +
| Size of the following array; should always be 1024.  {{change|Not present if full chunk is false.|}}
 
  |-
 
  |-
  | Value
+
  | Biomes
 +
| {{change|Optional|}} Array of VarInt
 +
| 1024 biome IDs, ordered by x then z then y, in 4&times;4&times;4 blocks.  {{change|Not present if full chunk is false.|}}  See [[Chunk Format#Biomes|Chunk Format § Biomes]].
 +
|-
 +
| Size
 
  | VarInt
 
  | VarInt
  | The amount to set it to
+
  | Size of Data in bytes
|}
 
 
 
Categories (these are namespaced, but with <code>:</code>. replaced with <code>.</code>):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Registry
 
 
  |-
 
  |-
  | <code>minecraft.mined</code>
+
  | Data
  | 0
+
  | Byte array
  | Blocks
+
  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
 
  |-
 
  |-
  | <code>minecraft.crafted</code>
+
  | Number of block entities
  | 1
+
  | VarInt
  | Items
+
  | Number of elements in the following array
 
  |-
 
  |-
  | <code>minecraft.used</code>
+
  | Block entities
| 2
+
  | Array of [[NBT|NBT Tag]]
| Items
+
  | All block entities in the chunkUse the x, y, and z tags in the NBT to determine their positions.
  |-
 
| <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.
+
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.
  
Custom has the following (unit only matters for clients):
+
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"
+
New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
! 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:
+
<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
 +
<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
  
* None: just a normal number (formatted with 0 decimal places)
+
==== Entity Movement ====
* 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 ====
+
This packet may be used to initialize an entity.
  
Sets tile entity associated with the block at the given location.
+
For player entities, either this packet or any move/look packet is sent every game tick. So the meaning of this packet is basically that the entity did not move/look since the last such packet.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,519: Line 513:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{removed}}
  |rowspan="3"| 0x09
+
  | 0x2A
  |rowspan="3"| Play
+
  | Play
  |rowspan="3"| Client
+
  | Client
  | Location
+
  | Entity ID
  | Position
+
  | VarInt
 
  |  
 
  |  
|-
 
| 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:
+
==== Ping ====
  
* '''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.)
+
Unknown what this packet does just yet, not used by the Notchian server or client.
* '''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"
 
{| class="wikitable"
Line 1,564: Line 533:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{added}}
  |rowspan="2"| 0x0B
+
  | 0x30
  |rowspan="2"| Play
+
  | Play
  |rowspan="2"| Client
+
  | Client
  | Location
+
  | ID
| Position
+
  | Int
| 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 ====
+
==== Update Light ====
  
Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
+
Updates light levels for a chunk.
 
 
{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Change|Block Change]]).}}
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,591: Line 554:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| {{Change|0x10|0x0F}}
+
  |rowspan="21"| {{change|0x23|0x25}}
  |rowspan="6"| Play
+
  |rowspan="21"| Play
  |rowspan="6"| Client
+
  |rowspan="21"| Client
 
  |colspan="2"| Chunk X
 
  |colspan="2"| Chunk X
  |colspan="2"| Int
+
  |colspan="2"| VarInt
  | Chunk X coordinate
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
 
  |colspan="2"| Chunk Z
 
  |colspan="2"| Chunk Z
  |colspan="2"| Int
+
  |colspan="2"| VarInt
  | Chunk Z coordinate
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  |colspan="2"| Record Count
+
  |colspan="2"| Trust Edges
 +
|colspan="2"| Boolean
 +
| If edges should be trusted for light updates.
 +
|- {{removed}}
 +
|colspan="2"| Sky Light Mask
 +
|colspan="2"| VarInt
 +
| Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
 +
|- {{removed}}
 +
|colspan="2"| Block Light Mask
 +
|colspan="2"| VarInt
 +
| Mask containing 18 bits, with the same order as sky light
 +
|- {{removed}}
 +
|colspan="2"| Empty Sky Light Mask
 +
|colspan="2"| VarInt
 +
| Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
 +
|- {{removed}}
 +
|colspan="2"| Empty Block Light Mask
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
  | Number of elements in the following array, i.e. the number of blocks affected
+
  | 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.
 +
|- {{Added}}
 +
|colspan="2"| Length 1
 +
|colspan="2"| VarInt
 +
| Length of the following array
 +
|- {{Added}}
 +
|colspan="2"| Sky Light Mask
 +
|colspan="2"| Array of Long
 +
| BitSet containing bits for each sections in the world + 2 (lowest bit 16-1 blocks below min world height, highest 1-16 above max world height)
 +
|- {{Added}}
 +
|colspan="2"| Length 2
 +
|colspan="2"| VarInt
 +
| Length of the following array
 +
|- {{Added}}
 +
|colspan="2"| Block Light Mask
 +
|colspan="2"| Array of Long
 +
| BitSet containing bits for each sections in the world + 2, same order as sky light
 +
|- {{Added}}
 +
|colspan="2"| Length 3
 +
|colspan="2"| VarInt
 +
| Length of the following array
 +
|- {{Added}}
 +
|colspan="2"| Empty Sky Light Mask
 +
|colspan="2"| Array of Long
 +
| BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their sky light values
 +
|- {{Added}}
 +
|colspan="2"| Length 4
 +
|colspan="2"| VarInt
 +
| Length of the following array
 +
|- {{Added}}
 +
|colspan="2"| Empty Block Light Mask
 +
|colspan="2"| Array of Long
 +
| BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their block light values
 +
|- {{added}}
 +
|colspan="2"| Sky Light array count
 +
|colspan="2"| VarInt
 +
| Number of entries in the following array
 
  |-
 
  |-
  |rowspan="3"| Record
+
  |rowspan="2"| Sky Light arrays
  | Horizontal Position
+
  | Length
  |rowspan="3"| Array
+
  |rowspan="2"| Array
  | Unsigned Byte
+
  | VarInt
  | 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.
+
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | Y Coordinate
+
  | Sky Light array
  | Unsigned Byte
+
  | Array of 2048 bytes
  | Y coordinate of the block
+
| 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.
 +
|- {{added}}
 +
|colspan="2"| Block Light array count
 +
|colspan="2"| VarInt
 +
  | Number of entries in the following array
 
  |-
 
  |-
  | Block ID
+
  |rowspan="2"| Block Light arrays
 +
| Length
 +
|rowspan="2"| Array
 
  | VarInt
 
  | 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.}}
+
  | Length of the following array in bytes (always 2048)
|}
 
 
 
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
+
  | Block Light array
  |style="background-color: #d9ead3;"| Optional [[Chat]]
+
  | Array of 2048 bytes
  |style="background-color: #d9ead3;"| Tooltip to display; only present if previous Boolean is true
+
  | 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.
 
  |}
 
  |}
  
==== Declare Commands ====
+
==== Join Game ====
  
Lists all of the commands on the server, and how they are parsed.
+
See [[Protocol Encryption]] for information on logging in.
 
 
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"
 
{| class="wikitable"
Line 1,690: Line 658:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x11
+
  |rowspan="16"| {{change|0x24|0x26}}
  |rowspan="3"| Play
+
  |rowspan="16"| Play
  |rowspan="3"| Client
+
  |rowspan="16"| Client
  | Count
+
  | Entity ID
  | VarInt
+
  | Int
  | Number of elements in the following array
+
  | The player's Entity ID (EID).
 
  |-
 
  |-
  | Nodes
+
  | Is hardcore
  | Array of Node
+
  | Boolean
  | A array of <code>CommandNode</code>s
+
  |
 
  |-
 
  |-
  | Root index
+
  | Gamemode
  | VarInt
+
  | Unsigned Byte
  | Index of the <code>RootCommandNode</code> in the previous array
+
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
|}
 
 
 
Node:
 
 
 
{| class="wikitable"
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | Flags
+
  | Previous Gamemode
 
  | Byte
 
  | Byte
  |
+
  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. Defaults to -1 if there is no previous gamemode. (More information needed)
  {| class="wikitable"
 
  ! Bit mask
 
  !colspan="2"| Meaning
 
  |-
 
  |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
+
  | World Count
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | Size of the following array.
 +
|-
 +
| World Names
 +
| Array of Identifier
 +
| Identifiers for all worlds on the server.
 
  |-
 
  |-
  | Children
+
  | Dimension Codec
  | Array of VarInt
+
  | [[NBT|NBT Tag Compound]]
  | The indexes of the children <code>CommandNode</code>s within the <code>Nodes</code> array
+
  | The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
 
  |-
 
  |-
  | Redirect node
+
  | Dimension
  | Optional VarInt
+
  | [[NBT|NBT Tag Compound]]
  | Only if flags & 0x08. Points to the redirect <code>CommandNode</code> within the <code>Nodes</code> array
+
  | Valid dimensions are defined per dimension registry sent before this. The structure of this tag is a dimension type (see below).
 +
|-
 +
| World Name
 +
| Identifier
 +
| Name of the world being spawned into.
 
  |-
 
  |-
  | Extra node data
+
  | Hashed seed
  | Extra node data
+
  | Long
  | Type depends on the <code>CommandNode</code> type, see below.
+
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
|}
 
 
 
Extra node data:
 
{| class="wikitable"
 
! Type
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | <code>RootCommandNode</code>
+
  | Max Players
  | Empty
+
  | VarInt
| Empty
+
  | Was once used by the client to draw the player list, but now is ignored.
  |  
 
 
  |-
 
  |-
  | <code>LiteralCommandNode</code>
+
  | View Distance
  | Literal
+
  | VarInt
  | String (32767)
+
  | Render distance (2-32).
| The text
 
 
  |-
 
  |-
  |rowspan="4"| <code>ArgumentCommandNode</code>
+
  | Reduced Debug Info
  | Name
+
  | Boolean
  | String (32767)
+
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}. For servers in development, this should almost always be false.
  | The name of the argument
 
 
  |-
 
  |-
  | Parser
+
  | Enable respawn screen
  | Identifier
+
  | Boolean
  | 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)
+
  | Set to false when the doImmediateRespawn gamerule is true.
 
  |-
 
  |-
  | Properties
+
  | Is Debug
  | Optional, varies
+
  | Boolean
  | See below.  Varies depending on the parser.
+
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  |-
 
  |-
  | Suggests
+
  | Is Flat
  | Optional Identifier
+
  | Boolean
  | Only present if (flags & 0x10) != 0. See below for the available types.
+
  | 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.
 
  |}
 
  |}
  
Parsers:
+
 
 +
The '''Dimension Codec''' NBT Tag Compound ([https://gist.githubusercontent.com/BomBardyGamer/c075a7a34b51f2df9d5aabdd2a762f4f/raw/c7352784dfadbca00d2282aeca04ed80081bfb09/dimension_codec.snbt Default value in SNBT]) includes two registries: "minecraft:dimension_type" and "minecraft:worldgen/biome".
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Identifier
+
  !Name
  ! Description
+
  !Type
  ! Properties
+
  !style="width: 250px;" colspan="2"| Notes
 
  |-
 
  |-
  | <code>brigadier:bool</code>
+
  | minecraft:dimension_type
  | Boolean value (<code>true</code> or <code>false</code>, case-sensitive)
+
  | TAG_Compound
  | None
+
  | The dimension type registry (see below).
 
  |-
 
  |-
  | <code>brigadier:double</code>
+
  | minecraft:worldgen/biome
  | Double
+
  | TAG_Compound
  | Specifies min and max values:
+
  | The biome registry (see below).
  {| class="wikitable"
+
|}
  ! Name
+
 
  ! Type
+
Dimension type registry:
  ! Description
+
 
  |-
+
{| class="wikitable"
  | Flags
+
!Name
  | Byte
+
!Type
  |
+
!style="width: 250px;" colspan="2"| Notes
  |-
 
  | 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>
+
  | type
  | Float
+
  | TAG_String
  | Specifies min and max values:
+
  | The name of the registry. Always "minecraft:dimension_type".
  {| 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>
+
  | value
  | Integer
+
| TAG_List
  | Specifies min and max values:
+
  | List of dimension types registry entries (see below).
  {| class="wikitable"
+
  |}
  ! Name
+
 
  ! Type
+
Dimension type registry entry:
  ! Description
+
 
  |-
+
{| class="wikitable"
  | Flags
+
!Name
  | Byte
+
!Type
  |
+
!style="width: 250px;" colspan="2"| Notes
  |-
 
  | 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>
+
  | name
  | A string
+
  | TAG_String
  | A VarInt enum:
+
  | The name of the dimension type (for example, "minecraft:overworld").
  {| 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>
+
  | id
  | A selector, player name, or UUID.
+
  | TAG_Int
  | Has a single flags byte:
+
  | The protocol ID of the dimension (matches the index of the element in the registry list).
  {| 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>
+
  | element
  | A player, online or not. Can also use a selector, which may match one or more players (but not entities).
+
  | TAG_Compound
  | None
+
  | The dimension type (see below).
 +
  |}
 +
 
 +
Dimension type:
 +
 
 +
{| class="wikitable"
 +
! Name
 +
! Type
 +
!style="width: 250px;" colspan="2"| Meaning
 +
! Values
 
  |-
 
  |-
  | <code>minecraft:block_pos</code>
+
  | piglin_safe
  | A location, represented as 3 numbers (which must be integers). May use relative locations with <code>~</code>.
+
  | TAG_Byte
  | None
+
  |colspan="2"| Whether piglins shake and transform to zombified piglins.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:vec3</code>
+
  | natural
  | 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>.
+
| TAG_Byte
  | None
+
  |colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:vec2</code>
+
  | ambient_light
  | 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>.
+
  | TAG_Float
  | None
+
|colspan="2"| How much light the dimension has.
 +
  | 0.0 to 1.0.
 
  |-
 
  |-
  | <code>minecraft:block_state</code>
+
  | fixed_time
  | A block state, optionally including NBT and state information.
+
  | Optional TAG_Long
  | None
+
|colspan="2"| If set, the time of the day is the specified value.
 +
  | If set, 0 to 24000.
 
  |-
 
  |-
  | <code>minecraft:block_predicate</code>
+
  | infiniburn
  | A block, or a block tag.
+
| TAG_String
  | None
+
  |colspan="2"| A resource location defining what block tag to use for infiniburn.
 +
  | "" or minecraft resource "minecraft:...".
 
  |-
 
  |-
  | <code>minecraft:item_stack</code>
+
  | respawn_anchor_works
  | An item, optionally including NBT.
+
| TAG_Byte
  | None
+
  |colspan="2"| Whether players can charge and use respawn anchors.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:item_predicate</code>
+
  | has_skylight
  | An item, or an item tag.
+
| TAG_Byte
  | None
+
  |colspan="2"| Whether the dimension has skylight access or not.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:color</code>
+
  | bed_works
  | A chat color. One of the names from [[Chat#Colors]], or <code>reset</code>.  Case-insensitive.
+
  | TAG_Byte
  | None
+
  |colspan="2"| Whether players can use a bed to sleep.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:component</code>
+
  | effects
  | A JSON [[Chat]] component.
+
| TAG_String
  | None
+
  |colspan="2"| ?
 +
  | "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else.
 
  |-
 
  |-
  | <code>minecraft:message</code>
+
  | has_raids
  | A regular message, potentially including selectors.
+
| TAG_Byte
  | None
+
|colspan="2"| Whether players with the Bad Omen effect can cause a raid.
  |-
+
  | 1: true, 0: false.
  | <code>minecraft:nbt</code>
+
  |- {{added}}
  | An NBT value, parsed using JSON-NBT rules.
+
  | min_y
  | None
+
  | TAG_Int
  |-
+
  |colspan="2"| The minimum Y level.
  | <code>minecraft:nbt_path</code>
+
  |
  | A path within an NBT value, allowing for array and member accesses.
+
  |- {{added}}
  | None
+
  | height
 +
| TAG_Int
 +
  |colspan="2"| The maximum height.
 +
  |
 
  |-
 
  |-
  | <code>minecraft:objective</code>
+
  | logical_height
  | A scoreboard objective.
+
  | TAG_Int
  | None
+
|colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension.
 +
  | 0-256.
 
  |-
 
  |-
  | <code>minecraft:objective_criteria</code>
+
  | coordinate_scale
  | A single score criterion.
+
| TAG_Float
  | None
+
  |colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:operation</code>
+
  | ultrawarm
  | A scoreboard operator.
+
| TAG_Byte
  | None
+
  |colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
 +
  | 1: true, 0: false.
 
  |-
 
  |-
  | <code>minecraft:particle</code>
+
  | has_ceiling
  | A particle effect (an identifier with extra information following it for specific particles, mirroring the [[#Particle|Particle]] packet)
+
  | TAG_Byte
  | None
+
  |colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
|-
+
  | 1: true, 0: false.
| <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:
+
Biome registry:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Identifier
+
!Name
  ! Description
+
!Type
  |-
+
!style="width: 250px;" colspan="2"| Notes
  | <code>minecraft:ask_server</code>
+
|-
  | Sends the <code>Tab-Complete</code> packet to the server to request tab completions.
+
| type
  |-
+
| TAG_String
  | <code>minecraft:all_recipes</code>
+
| The name of the registry. Always "minecraft:worldgen/biome".
  | Suggests all the available recipes.
+
|-
  |-
+
| value
  | <code>minecraft:available_sounds</code>
+
| TAG_List
  | Suggests all the available sounds.
+
| List of biome registry entries (see below).
  |-
+
|}
  | <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.
+
Biome registry entry:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Packet ID
+
  !Name
! State
+
  !Type
! Bound To
+
  !style="width: 250px;" colspan="2"| Notes
! 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
+
  | name
  | Int
+
  | TAG_String
  | Effect Y multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
+
  | The name of the biome (for example, "minecraft:ocean").
 
  |-
 
  |-
  | Effect Position Z
+
  | id
  | Int
+
  | TAG_Int
  | Effect Z multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
+
  | The protocol ID of the biome (matches the index of the element in the registry list).
 
  |-
 
  |-
  | Volume
+
  | element
  | Float
+
  | TAG_Compound
  | 1 is 100%, can be more
+
  | The biome properties (see below).
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
 
  |}
 
  |}
  
==== Chunk Data ====
+
Biome properties:
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
 
 
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
 
 
 
{{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"
  ! Packet ID
+
  !colspan="2"|Name
  ! State
+
  !colspan="2"|Type
! Bound To
+
  !style="width: 250px;" colspan="2"| Meaning
  ! Field Name
+
  !colspan="2"|Values
! Field Type
 
  ! Notes
 
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x20|0x21}}
+
  |colspan="2"|precipitation
  |rowspan="9"| Play
+
  |colspan="2"|TAG_String
  |rowspan="9"| Client
+
  |colspan="2"| The type of precipitation in the biome.
  | Chunk X
+
  |colspan="2"|"rain", "snow", or "none".
| Int
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
 
  |-
 
  |-
  | Chunk Z
+
  |colspan="2"| depth
  | Int
+
  |colspan="2"| TAG_Float
  | Chunk coordinate (block coordinate divided by 16, rounded down)
+
  |colspan="2"| The depth factor of the biome.
 +
|colspan="2"| The default values vary between 1.5 and -1.8.
 
  |-
 
  |-
  | Ground-Up Continuous
+
  |colspan="2"| temperature
  | Boolean
+
|colspan="2"| TAG_Float
  | See [[Chunk Format#Ground-up continuous|Chunk Format]]
+
  |colspan="2"| The temperature factor of the biome.
 +
  |colspan="2"| The default values vary between 2.0 and -0.5.
 
  |-
 
  |-
  | Primary Bit Mask
+
  |colspan="2"| scale
| VarInt
+
  |colspan="2"| TAG_Float
  | 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).
+
  |colspan="2"| ?
  |-
+
  |colspan="2"| The default values vary between 1.225 and 0.0.
| Size
 
  | VarInt
 
| Size of Data in bytes
 
 
  |-
 
  |-
  | Data
+
  |colspan="2"| downfall
  | Byte array
+
|colspan="2"| TAG_Float
  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
+
  |colspan="2"| ?
 +
  |colspan="2"| The default values vary between 1.0 and 0.0.
 
  |-
 
  |-
  | Number of block entities
+
  |colspan="2"| category
  | VarInt
+
  |colspan="2"| TAG_String
  | Number of elements in the following array
+
  |colspan="2"| The category of the biome.
 +
|colspan="2"| Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
 
  |-
 
  |-
  | Block entities
+
  |colspan="2"| temperature_modifier
  | Array of [[NBT|NBT Tag]]
+
  |colspan="2"| Optional TAG_String
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
+
  |colspan="2"| ?
  |}
+
  |colspan="2"| The only known value is "frozen".
 
 
===== Data structure =====
 
 
 
The data section of the packet contains most of the useful data for the chunk.
 
 
 
{| class="wikitable"
 
 
  |-
 
  |-
  ! Field Name
+
  |rowspan="11"| effects
  ! Field Type
+
  | sky_color
  ! Notes
+
  |rowspan="11"| TAG_Compound
 +
| TAG_Int
 +
|colspan="2"| The color of the sky.
 +
| Example: 8364543, which is #7FA1FF in RGB.
 
  |-
 
  |-
  | Data
+
  | water_fog_color
  | Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
+
  | TAG_Int
  | 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.
+
|colspan="2"| Possibly the tint color when swimming.
 +
  | Example: 8364543, which is #7FA1FF in RGB.
 
  |-
 
  |-
  | Biomes
+
  | fog_color
  | Optional {{Change|Byte|Int}} Array
+
  | TAG_Int
| Only sent if Ground-Up Continuous is true; 256 {{change|bytes|entries}} if present
+
  |colspan="2"| Possibly the color of the fog effect when looking past the view distance.
  |}
+
  | Example: 8364543, which is #7FA1FF in RGB.
 
 
==== Spawn Particle ====
 
 
 
Displays the named particle
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="11"| {{Change|0x22|0x23}}
+
  | water_color
  |rowspan="11"| Play
+
  | TAG_Int
  |rowspan="11"| Client
+
  |colspan="2"| The tint color of the water blocks.
  | Particle ID
+
  | Example: 8364543, which is #7FA1FF in RGB.
| Int
 
| The particle ID listed in [[#Particle]].
 
 
  |-
 
  |-
  | Long Distance
+
  | foliage_color
  | Boolean
+
  | Optional TAG_Int
  | If true, particle distance increases from 256 to 65536
+
  |colspan="2"| The tint color of the grass.
 +
| Example: 8364543, which is #7FA1FF in RGB.
 +
|-
 +
| grass_color
 +
| Optional TAG_Int
 +
| colspan="2"| ?
 +
| Example: 8364543, which is #7FA1FF in RGB.
 
  |-
 
  |-
  | X
+
  | grass_color_modifier
  | Float
+
  | Optional TAG_String
  | X position of the particle
+
  |colspan="2"| Unknown, likely affects foliage color.
 +
| If set, known values are "swamp" and "dark_forest".
 
  |-
 
  |-
  | Y
+
  | music
  | Float
+
  | Optional TAG_Compound
  | Y position of the particle
+
  |colspan="2"| Music properties for the biome.
|-
+
  | If present, contains the fields: replace_current_music (TAG_Byte), sound (TAG_String), max_delay (TAG_Int), min_delay (TAG_Int).
| Z
 
| Float
 
| Z position of the particle
 
|-
 
| Offset X
 
| Float
 
  | This is added to the X position after being multiplied by random.nextGaussian()
 
|-
 
| Offset Y
 
| Float
 
| This is added to the Y position after being multiplied by random.nextGaussian()
 
 
  |-
 
  |-
  | Offset Z
+
  | ambient_sound
  | Float
+
  | Optional TAG_String
  | This is added to the Z position after being multiplied by random.nextGaussian()
+
  |colspan="2"| Ambient soundtrack.
 +
| If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
 
  |-
 
  |-
  | Particle Data
+
  | additions_sound
  | Float
+
  | Optional TAG_Compound
  | The data of each particle
+
  |colspan="2"| Additional ambient sound that plays randomly.
 +
| If present, contains the fields: sound (TAG_String), tick_chance (TAG_Double).
 
  |-
 
  |-
  | Particle Count
+
  | mood_sound
  | Int
+
  | Optional TAG_Compound
  | The number of particles to create
+
  |colspan="2"| Additional ambient sound that plays at an interval.
 +
| If present, contains the fields: sound (TAG_String), tick_delay (TAG_Int), offset (TAG_Double), block_search_extent (TAG_Int).
 
  |-
 
  |-
  | Data
+
  | particle
  | {{Change|Array of VarInt|Varies}}
+
  | Optional TAG_Compound
  | {{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]]}}
+
|colspan="2"| Particles that appear randomly in the biome.
 +
  | If present, contains the fields: probability (TAG_Float), options (TAG_Compound). The "options" compound contains the field "type" (TAG_String), which identifies the particle type.
 
  |}
 
  |}
  
==== Map ====
+
==== Map Data ====
  
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
{{Warning|Map icons with types over 15 currently don't work on servers (see [https://bugs.mojang.com/browse/MC-126815 MC-126815]).}}
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,247: Line 1,022:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="15"| {{Change|0x24|0x25}}
+
  |rowspan="18"| {{change|0x25|0x27}}
  |rowspan="15"| Play
+
  |rowspan="18"| Play
  |rowspan="15"| Client
+
  |rowspan="18"| Client
  |colspan="2"| Item Damage
+
  |colspan="2"| Map ID
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
  | The damage value (map ID) of the map being modified
+
  | Map ID of the map being modified
 
  |-
 
  |-
 
  |colspan="2"| Scale
 
  |colspan="2"| Scale
 
  |colspan="2"| Byte
 
  |colspan="2"| Byte
 
  | From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
  | From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 +
|- {{removed}}
 +
|colspan="2"| Tracking Position
 +
|colspan="2"| Boolean
 +
| Specifies whether player and item frame icons are shown
 +
|-
 +
|colspan="2"| Locked
 +
|colspan="2"| Boolean
 +
| True if the map has been locked in a cartography table
 
  |-  
 
  |-  
 +
|- {{added}}
 
  |colspan="2"| Tracking Position
 
  |colspan="2"| Tracking Position
 
  |colspan="2"| Boolean
 
  |colspan="2"| Boolean
  | Specifies whether the icons are shown
+
  | Specifies whether player and item frame icons are shown
  |-  
+
  |-
 
  |colspan="2"| Icon Count
 
  |colspan="2"| Icon Count
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
  | Number of elements in the following array
+
  | Number of elements in the following array. {{change||Only present if "Tracking Position" is true.}}
 
  |-
 
  |-
  |rowspan="5"| Icon
+
  |rowspan="6"| Icon
  | Direction And Type
+
  | Type
  |rowspan="5"| Array
+
  |rowspan="6"| Array
  | Byte
+
  | VarInt enum
  | 0xF0 = Type, 0x0F = Direction
+
  | See below
 
  |-
 
  |-
 
  | X
 
  | X
 
  | Byte
 
  | Byte
  |  
+
  | Map coordinates: -128 for furthest left, +127 for furthest right
 
  |-
 
  |-
 
  | Z
 
  | Z
 
  | Byte
 
  | Byte
  |  
+
  | Map coordinates: -128 for highest, +127 for lowest
  |- style="background-color: #d9ead3;"
+
|-
 +
| Direction
 +
| Byte
 +
  | 0-15
 +
|-
 
  | Has Display Name
 
  | Has Display Name
 
  | Boolean
 
  | Boolean
 
  |
 
  |
  |- style="background-color: #d9ead3;"
+
  |-
 
  | Display Name
 
  | Display Name
 
  | Optional [[Chat]]
 
  | Optional [[Chat]]
Line 2,289: Line 1,077:
 
  |-  
 
  |-  
 
  |colspan="2"| Columns
 
  |colspan="2"| Columns
  |colspan="2"| Byte
+
  |colspan="2"| Unsigned Byte
 
  | Number of columns updated
 
  | Number of columns updated
 
  |-
 
  |-
Line 2,351: Line 1,139:
 
  | 9
 
  | 9
 
  | Temple
 
  | Temple
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 10
 
  | 10
 
  | White Banner
 
  | White Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 11
 
  | 11
 
  | Orange Banner
 
  | Orange Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 12
 
  | 12
 
  | Magenta Banner
 
  | Magenta Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 13
 
  | 13
 
  | Light Blue Banner
 
  | Light Blue Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 14
 
  | 14
 
  | Yellow Banner
 
  | Yellow Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 15
 
  | 15
 
  | Lime Banner
 
  | Lime Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 16
 
  | 16
 
  | Pink Banner
 
  | Pink Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 17
 
  | 17
 
  | Gray Banner
 
  | Gray Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 18
 
  | 18
 
  | Light Gray Banner
 
  | Light Gray Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 19
 
  | 19
 
  | Cyan Banner
 
  | Cyan Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 20
 
  | 20
 
  | Purple Banner
 
  | Purple Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 21
 
  | 21
 
  | Blue Banner
 
  | Blue Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 22
 
  | 22
 
  | Brown Banner
 
  | Brown Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 23
 
  | 23
 
  | Green Banner
 
  | Green Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 24
 
  | 24
 
  | Red Banner
 
  | Red Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 25
 
  | 25
 
  | Black Banner
 
  | Black Banner
  |- style="background-color: #d9ead3;"
+
  |-
 
  | 26
 
  | 26
 
  | Treasure marker
 
  | Treasure marker
 
  |}
 
  |}
  
==== Craft Recipe Response ====
+
==== Combat Event ====
  
Response to the serverbound packet ([[#Craft Recipe Request|Craft Recipe Request]]), with the same recipe ID.  Appears to be used to notify the UI.
+
Originally used for metadata for twitch streaming circa 1.8.  Now only used to display the game over screen (with enter combat and end combat completely ignored by the Notchain client)
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,412: Line 1,200:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
 +
!colspan="2"| Field Name
 +
! Field Type
 +
! Notes
 +
|- {{Removed}}
 +
|rowspan="8"| 0x31
 +
|rowspan="8"| Play
 +
|rowspan="8"| Client
 +
|colspan="2"| Event
 +
| VarInt Enum
 +
| Determines the layout of the remaining packet.
 +
|- {{Removed}}
 +
! Event
 
  ! Field Name
 
  ! Field Name
 +
!
 +
!
 +
|- {{Removed}}
 +
| 0: enter combat
 +
| ''no fields''
 +
| ''no fields''
 +
|
 +
|- {{Removed}}
 +
|rowspan="2"| 1: end combat
 +
| Duration
 +
| VarInt
 +
| Length of the combat in ticks.
 +
|- {{Removed}}
 +
| Entity ID
 +
| Int
 +
| ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
 +
|- {{Removed}}
 +
|rowspan="3"| 2: entity dead
 +
| Player ID
 +
| VarInt
 +
| Entity ID of the player that died (should match the client's entity ID).
 +
|- {{Removed}}
 +
| Entity ID
 +
| Int
 +
| The killing entity's ID, or -1 if there is no obvious killer.
 +
|- {{Removed}}
 +
| Message
 +
| [[Chat]]
 +
| The death message.
 +
|}
 +
 +
==== End Combat Event ====
 +
 +
Unused by the Notchain client.
 +
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 +
! Field Type
 +
! Notes
 +
|- {{Added}}
 +
|rowspan="8"| 0x33
 +
|rowspan="8"| Play
 +
|rowspan="8"| Client
 +
| Duration
 +
| VarInt
 +
| Length of the combat in ticks.
 +
|- {{Added}}
 +
| Entity ID
 +
| Int
 +
| ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
 +
|- {{Added}}
 +
|}
 +
 +
==== Enter Combat Event ====
 +
 +
Unused by the Notchain client.
 +
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 +
! Field Type
 +
! Notes
 +
|- {{Added}}
 +
|rowspan="8"| 0x34
 +
|rowspan="8"| Play
 +
|rowspan="8"| Client
 +
|}
 +
 +
 +
==== Death Combat Event ====
 +
 +
Used to send a respawn screen.
 +
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{Added}}
  |rowspan="2"| {{Change|0x2B|0x2C}}
+
  |rowspan="8"| 0x35
  |rowspan="2"| Play
+
  |rowspan="8"| Play
  |rowspan="2"| Client
+
  |rowspan="8"| Client
  | Window ID
+
  | Player ID
  | Byte
+
  | VarInt
  |
+
  | Entity ID of the player that died (should match the client's entity ID).
  |-
+
  |- {{Added}}
  | Recipe
+
  | Entity ID
  | {{Change|VarInt|Identifer}}
+
  | Int
  | A recipe ID
+
| The killing entity's ID, or -1 if there is no obvious killer.
 +
|- {{Added}}
 +
| Message
 +
| [[Chat]]
 +
  | The death message.
 
  |}
 
  |}
  
==== Face Player ====
+
==== Player Position And Look (clientbound) ====  
 +
 
 +
Updates the player's position on the server. This packet will also close the “Downloading Terrain” screen when joining/respawning.
 +
 
 +
If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 meters, the client will be kicked for “You moved too quickly :( (Hacking?)”.
 +
 
 +
Also if the fixed-point number of X or Z is set greater than <code>3.2E7D</code> the client will be kicked for “Illegal position”.
 +
 
 +
Yaw is measured in degrees, and does not follow classical trigonometry rules. The unit circle of yaw on the XZ-plane starts at (0, 1) and turns counterclockwise, with 90 at (-1, 0), 180 at (0, -1) and 270 at (1, 0). Additionally, yaw is not clamped to between 0 and 360 degrees; any number is valid, including negative numbers and numbers greater than 360.
  
Used to rotate the client player to face the given location or entity (for <code>/teleport [<targets>] <x> <y> <z> facing</code>).
+
Pitch is measured in degrees, where 0 is looking straight ahead, -90 is looking straight up, and 90 is looking straight down.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,440: Line 1,335:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| 0x30
+
  |rowspan="8"| {{change|0x34|0x38}}
 
  |rowspan="8"| Play
 
  |rowspan="8"| Play
 
  |rowspan="8"| Client
 
  |rowspan="8"| Client
 +
| X
 +
| Double
 +
| Absolute or relative position, depending on Flags.
 
  |-
 
  |-
  | Feet/eyes
+
  | Y
  | VarInt enum
+
  | Double
  | Values are feet=0, eyes=1.  If set to eyes, aims using the head position; otherwise aims using the feet position.
+
  | Absolute or relative position, depending on Flags.
 
  |-
 
  |-
  | Target x
+
  | Z
 
  | Double
 
  | Double
  | x coordinate of the point to face towards
+
  | Absolute or relative position, depending on Flags.
 +
|-
 +
| Yaw
 +
| Float
 +
| Absolute or relative rotation on the X axis, in degrees.
 
  |-
 
  |-
  | Target y
+
  | Pitch
  | Double
+
  | Float
  | y coordinate of the point to face towards
+
  | Absolute or relative rotation on the Y axis, in degrees.
 
  |-
 
  |-
  | Target z
+
  | Flags
  | Double
+
  | Byte
  | z coordinate of the point to face towards
+
  | Bit field, see below.
 
  |-
 
  |-
  | Is entity
+
  | Teleport ID
 +
| VarInt
 +
| Client should confirm this packet with [[#Teleport Confirm|Teleport Confirm]] containing the same Teleport ID.
 +
|- {{added}}
 +
| Dismount Vehicle
 
  | Boolean
 
  | Boolean
  | If true, additional information about an entity is provided.
+
  | True if the player should dismount their vehicle.
 +
|}
 +
 
 +
About the Flags field:
 +
 
 +
<Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
 +
 
 +
{| class="wikitable"
 +
|-
 +
! Field
 +
! Bit
 +
|-
 +
| X
 +
| 0x01
 +
|-
 +
| Y
 +
| 0x02
 
  |-
 
  |-
  | Entity ID
+
  | Z
  | Optional VarInt
+
  | 0x04
  | Only if is entity is true &mdash; the entity to face towards
+
  |-
 +
| Y_ROT
 +
| 0x08
 
  |-
 
  |-
  | Entity feet/eyes
+
  | X_ROT
  | Optional VarInt enum
+
  | 0x10
| 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.
+
==== Destroy Entity ====
  
==== Unlock Recipes ====
+
Sent by the server when {{change|a list of entities|an entity}} is to be destroyed on the client.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,485: Line 1,408:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="10"| {{Change|0x31|0x33}}
+
  |rowspan="4"| 0x3A
  |rowspan="10"| Play
+
  |rowspan="4"| Play
  |rowspan="10"| Client
+
  |rowspan="4"| Client
  |-
+
  |- {{removed}}
  | Action
+
  | Count
 
  | VarInt
 
  | VarInt
  | 0: init, 1: add, 2: remove
+
  | Number of elements in the following array.
|-
+
  |- {{Removed}}
| Crafting Recipe Book Open
+
  | Array of VarInt
| Boolean
+
  | The list of entities of destroy.
| If true, then the crafting recipe book will be open when the player opens its inventory.
+
  |- {{Added}}
  |-
+
  | Entity ID
  | 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.
 
|-
 
| Array size 1
 
 
  | VarInt
 
  | VarInt
| Number of elements in the following array
 
|-
 
| Recipe IDs
 
| Array of {{Change|VarInt|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 {{Change|VarInt|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. VERIFY LIST ORDER?
 
* 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.
 
  
==== Scoreboard Objective ====
+
==== Resource Pack Send ====  
 
 
This is sent to the client when it should create a new {{Minecraft Wiki|scoreboard}} objective or remove one.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,542: Line 1,433:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x42|0x44}}
+
  |rowspan="4"| {{change|0x38|0x3C}}
 
  |rowspan="4"| Play
 
  |rowspan="4"| Play
 
  |rowspan="4"| Client
 
  |rowspan="4"| Client
  | Objective Name
+
  | URL
  | String (16)
+
  | String (32767)
  | An unique name for the objective
+
  | The URL to the resource pack.
 
  |-
 
  |-
  | Mode
+
  | Hash
  | Byte
+
  | String (40)
  | 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text.
+
  | A 40 character hexadecimal and lowercase [[wikipedia:SHA-1|SHA-1]] hash of the resource pack file. (must be lower case in order to work)<br />If it's not a 40 character hexadecimal string, the client will not use it for hash verification and likely waste bandwidth — but it will still treat it as a unique id
  |-
+
  |- {{Added}}
  | Objective Value
+
  | Forced
  | Optional String (32)
+
  | Boolean
  | Only if mode is 0 or 2. The text to be displayed for the score
+
  | The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.
  |-
+
  |- {{Added}}
  | Type
+
  | Forced Message
  | Optional {{change|String|VarInt Enum}}
+
  | [[Chat]]
  | Only if mode is 0 or 2. {{change|“integer” or “hearts”|0 = "integer", 1 = "hearts"}}
+
  | This is sent with the force resourcepack popup.
 
  |}
 
  |}
 
+
==== Title ====
==== Teams ====
 
 
 
Creates and updates teams.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,573: Line 1,461:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{ Removed }}
  |rowspan="23"| {{Change|0x44|0x46}}
+
  |rowspan="10"| 0x4F
  |rowspan="23"| Play
+
  |rowspan="10"| Play
  |rowspan="23"| Client
+
  |rowspan="10"| Client
  |colspan="2"| Team Name
+
  |colspan="2"| Action
  | String (16)
+
| VarInt Enum
  | A unique name for the team. (Shared with scoreboard).
+
|
  |-
+
|- {{ Removed }}
  |colspan="2"| Mode
+
! Action
  | Byte
+
! Field Name
  | Determines the layout of the remaining packet
+
!
  |-
+
!
  |rowspan="9"| 0: create team
+
|- {{ Removed }}
  | Team Display Name
+
| 0: set title
  | String (32)
+
| Title Text
 +
| [[Chat]]
 +
|
 +
|- {{ Removed }}
 +
| 1: set subtitle
 +
| Subtitle Text
 +
| [[Chat]]
 +
|
 +
|- {{ Removed }}
 +
| 2: set action bar
 +
| Action bar text
 +
  | [[Chat]]
 +
  | Displays a message above the hotbar (the same as position 2 in [[#Chat Message (clientbound)|Chat Message (clientbound)]].
 +
  |- {{ Removed }}
 +
  |rowspan="3"| 3: set times and display
 +
| Fade In
 +
| Int
 +
| Ticks to spend fading in.
 +
|- {{ Removed }}
 +
| Stay
 +
  | Int
 +
  | Ticks to keep the title displayed.
 +
  |- {{ Removed }}
 +
| Fade Out
 +
| Int
 +
| Ticks to spend out, not when to start fading out.
 +
  |- {{ Removed }}
 +
| 4: hide
 +
  | ''no fields''
 +
  | ''no fields''
 
  |  
 
  |  
  |- style="background-color: #f4cccc; text-decoration: line-through;"
+
  |- {{ Removed }}
| Team Prefix
+
  | 5: reset
| 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
 
| Byte
 
| Bit mask. 0x01: Allow friendly fire, 0x02: can see invisible players on same team
 
|-
 
| Name Tag Visibility
 
| String Enum (32)
 
| <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>
 
|-
 
| Collision Rule
 
| String Enum (32)
 
| <code>always</code>, <code>pushOtherTeams</code>, <code>pushOwnTeam</code>, <code>never</code>
 
|-
 
| {{change|Color|Formatting}}
 
| {{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
 
| Number of elements in the following array
 
|-
 
| Entities
 
| Array of String (40)
 
| Identifiers for the entities in this team.  For players, this is their username; for other entities, it is their UUID.
 
|-
 
| 1: remove team
 
 
  | ''no fields''
 
  | ''no fields''
 
  | ''no fields''
 
  | ''no fields''
 
  |  
 
  |  
 +
|}
 +
 +
“Hide” makes the title disappear, but if you run times again the same title will appear. “Reset” erases the text.
 +
 +
The title is visible on screen for Fade In + Stay + Fade Out ticks.
 +
 +
==== Action Bar ====
 +
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="1"| 0x41
 +
|rowspan="1"| Play
 +
|rowspan="1"| Client
 +
| Action bar text
 +
| [[Chat]]
 +
| Displays a message above the hotbar (the same as position 2 in [[#Chat Message (clientbound)|Chat Message (clientbound)]].
 +
|}
 +
==== World Border Center ====
 +
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  |rowspan="7"| 2: update team info
+
  |rowspan="2"| 0x42
  | Team Display Name
+
|rowspan="2"| Play
  | String (32)
+
|rowspan="2"| Client
 +
  | X
 +
  | Double
 
  |  
 
  |  
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 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
+
  | Z
  | Byte
+
  | Double
  | Bit mask. 0x01: Allow friendly fire, 0x02: can see invisible entities on same team
+
  |  
 +
|}
 +
==== World Border Lerp Size ====
 +
 
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  | Name Tag Visibility
+
  |rowspan="3"| 0x43
  | String Enum (32)
+
|rowspan="3"| Play
  | <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>
+
|rowspan="3"| Client
 +
  | Old Diameter
 +
  | Double
 +
| Current length of a single side of the world border, in meters.
 
  |-
 
  |-
  | Collision Rule
+
  | New Diameter
  | String Enum (32)
+
  | Double
  | <code>always</code>, <code>pushOtherTeams</code>, <code>pushOwnTeam</code>, <code>never</code>
+
  | Target length of a single side of the world border, in meters.
 
  |-
 
  |-
  | {{change|Color|Formatting}}
+
  | Speed
  | {{Change|Byte|VarInt enum}}
+
  | VarLong
  | {{change|For colors, the same [[Chat]] colors (0-15). -1 indicates RESET/no color.|See below for more info.}}
+
  | Number of real-time ''milli''seconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.
 +
|}
 +
==== World Border Size ====
 +
 
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  |rowspan="2"| 3: add players to team
+
  |rowspan="1"| 0x44
  | Entity Count
+
  |rowspan="1"| Play
 +
|rowspan="1"| Client
 +
| Diameter
 +
| Double
 +
| Length of a single side of the world border, in meters.
 +
|}
 +
 
 +
==== World Border Warning Delay ====
 +
 
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="1"| 0x45
 +
|rowspan="1"| Play
 +
|rowspan="1"| Client
 +
| Warning Time
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | In seconds as set by <code>/worldborder warning time</code>.
  |-
+
  |}
  | Entities
+
 
  | Array of String (40)
+
==== World Border Warning Reach ====
  | Identifiers for the entities added. For players, this is their username; for other entities, it is their UUID.
+
 
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
  ! Bound To
 +
  ! Field Name
 +
  ! Field Type
 +
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 4: remove players from team
+
  |rowspan="1"| 0x46
  | Entity Count
+
  |rowspan="1"| Play
 +
|rowspan="1"| Client
 +
| Warning Blocks
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | In meters.
|-
 
| Entities
 
| Array of String (40)
 
| Identifiers for the entities removed.  For players, this is their username; for other entities, it is their UUID.
 
 
  |}
 
  |}
  
Formatting: The formatting of a team defines how the names of the team members are visualized. The following table lists all the possible formattings.
+
==== Spawn Position ====
 +
 
 +
Sent by the server after login to specify the coordinates of the spawn point (the point at which players spawn at, and which the compass points to). It can be sent at any time to update the point compasses point at.
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! ID
+
  ! Packet ID
  ! Formatting
+
  ! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  | 0-15
+
  |rowspan="4"| {{change|0x42|0x4B}}
| Color formatting, same values as [[Chat]] colors.
+
  |rowspan="4"| Play
|-
+
  |rowspan="4"| Client
| 16
+
  | Location
  | Obfuscated
+
  | Position
|-
+
  | Spawn location.
  | 17
+
  |- {{added}}
| Bold
+
  | Angle
  |-
+
  | Float
  | 18
+
  |
  | Strikethrough
 
  |-
 
  | 19
 
| Underlined
 
|-
 
| 20
 
| Italic
 
|-
 
  | 21
 
  | Reset
 
 
  |}
 
  |}
  
==== Stop Sound ====
+
==== Set Title SubTitle ====  
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,712: Line 1,667:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{ Added }}
  |rowspan="7"| 0x4B
+
  |rowspan="4"| 0x57
  |rowspan="7"| Play
+
  |rowspan="4"| Play
  |rowspan="7"| Client
+
  |rowspan="4"| Client
  | Flags
+
  | Subtitle Text
  | Byte
+
  | [[Chat]]
| Controls which fields are present.
+
  |- {{ Added }}
|-
 
| Source
 
| Optional VarInt enum
 
| Only if flags is 3 or 1 (bit mask 0x1).  See below.  If not present, then sounds from all sources are cleared.
 
|-
 
| Sound
 
| Optional Identifier
 
| 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.
 
 
  |}
 
  |}
  
Categories:
+
 
 +
==== Set Title Text ====
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Name !! Value
+
  ! Packet ID
  |-
+
  ! State
  | master || 0
+
  ! Bound To
  |-
+
  ! Field Name
  | music || 1
+
  ! Field Type
  |-
+
  ! Notes
| record || 2
+
  |- {{ Added }}
  |-
+
  |rowspan="4"| 0x59
  | weather || 3
+
  |rowspan="4"| Play
|-
+
  |rowspan="4"| Client
  | block || 4
+
  | Title Text
|-
+
  | [[Chat]]
  | hostile || 5
+
  |- {{ Added }}
|-
 
| neutral || 6
 
|-
 
| player || 7
 
  |-
 
  | ambient || 8
 
  |-
 
| voice || 9
 
 
  |}
 
  |}
  
==== Declare Recipes ====
+
==== Set Title Time====  
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|- {{ Added }}
 +
|rowspan="4"| 0x5A
 +
|rowspan="4"| Play
 +
|rowspan="4"| Client
 +
| Fade In
 +
| Int
 +
| Ticks to spend fading in.
 +
|- {{ Added }}
 +
| Stay
 +
| Int
 +
| Ticks to keep the title displayed.
 +
|- {{ Added }}
 +
| Fade Out
 +
| Int
 +
| Ticks to spend out, not when to start fading out.
 +
|}
 +
 
 +
 
 +
==== Entity Properties ====
 +
 
 +
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,765: Line 1,734:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x53
+
  |rowspan="6"| {{change|0x58|0x63}}
  |rowspan="4"| Play
+
  |rowspan="6"| Play
  |rowspan="4"| Client
+
  |rowspan="6"| Client
  |colspan="2"| Num Recipes
+
  |colspan="2"| Entity ID
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
  | Number of elements in the following array
+
|
 +
|-
 +
|colspan="2"| Number Of Properties
 +
|colspan="2"| {{change|Int|VarInt}}
 +
  | Number of elements in the following array.
 
  |-
 
  |-
  |rowspan="3"| Recipe
+
  |rowspan="4"| Property
  | Recipe ID
+
  | Key
  |rowspan="3"| Array
+
  |rowspan="4"| Array
 
  | Identifier
 
  | Identifier
  |
+
  | See below.
 +
|-
 +
| Value
 +
| Double
 +
| See below.
 
  |-
 
  |-
  | Type
+
  | Number Of Modifiers
  | String
+
  | VarInt
  | The recipe type, see below
+
  | Number of elements in the following array.
 
  |-
 
  |-
  | Data
+
  | Modifiers
  | Optional, varies
+
  | Array of Modifier Data
  | Additional data for the recipe. For some types, there will be no data.
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
Recipe types:
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
  
 
{| class="wikitable"
 
{| class="wikitable"
! Type
 
! Description
 
! Data
 
 
  |-
 
  |-
  | <code>crafting_shapeless</code>
+
  ! Key
  | Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
+
  ! Default
  | As follows:
+
  ! Min
  {| class="wikitable"
+
! Max
    ! Name
+
! Label
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredient count
 
    | VarInt
 
    | Number of elements in the following array
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
 
  |-
 
  |-
  | <code>crafting_shaped</code>
+
  | generic.max_health
  | Shaped crafting recipe. All items must be present in the same pattern (which may be flipped horizontally or translated)
+
  | 20.0
  | As follows:
+
  | 0.0
  {| class="wikitable"
+
| 1024.0
    ! Name
+
  | Max Health.
    ! Type
 
    ! Description
 
    |-
 
    | Width
 
    | VarInt
 
    |
 
    |-
 
    | Height
 
    | VarInt
 
    |
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    | Length is width * height.  Indexed by x + (y * width).
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
 
  |-
 
  |-
  | <code>crafting_special_armordye</code>
+
  | generic.follow_range
  | Recipe for dying leather armor
+
  | 32.0
  | None
+
  | 0.0
 +
| 2048.0
 +
| Follow Range.
 
  |-
 
  |-
  | <code>crafting_special_bookcloning</code>
+
  | generic.knockback_resistance
  | Recipe for copying contents of written books
+
  | 0.0
  | None
+
  | 0.0
 +
| 1.0
 +
| Knockback Resistance.
 
  |-
 
  |-
  | <code>crafting_special_mapcloning</code>
+
  | generic.movement_speed
  | Recipe for copying maps
+
  | 0.7
  | None
+
  | 0.0
 +
| 1024.0
 +
| Movement Speed.
 
  |-
 
  |-
  | <code>crafting_special_mapextending</code>
+
  | generic.attack_damage
  | Recipe for adding paper to maps
+
  | 2.0
  | None
+
  | 0.0
 +
| 2048.0
 +
| Attack Damage.
 
  |-
 
  |-
  | <code>crafting_special_firework_rocket</code>
+
  | generic.attack_speed
  | Recipe for making firework rockets
+
  | 4.0
  | None
+
  | 0.0
 +
| 1024.0
 +
| Attack Speed.
 
  |-
 
  |-
  | <code>crafting_special_firework_star</code>
+
  | generic.flying_speed
  | Recipe for making firework stars
+
  | 0.4
  | None
+
  | 0.0
 +
| 1024.0
 +
| Flying Speed.
 
  |-
 
  |-
  | <code>crafting_special_firework_star_fade</code>
+
  | generic.armor
  | Recipe for making firework stars fade between multiple colors
+
  | 0.0
  | None
+
  | 0.0
 +
| 30.0
 +
| Armor.
 
  |-
 
  |-
  | <code>crafting_special_repairitem</code>
+
  | generic.armor_toughness
  | Recipe for repairing items via crafting
+
  | 0.0
  | None
+
  | 0.0
 +
| 20.0
 +
| Armor Toughness.
 
  |-
 
  |-
  | <code>crafting_special_tippedarrow</code>
+
  | generic.attack_knockback
  | Recipe for crafting tipped arrows
+
  | 0.0
  | None
+
  | 0.0
 +
| 5.0
 +
| &mdash;
 
  |-
 
  |-
  | <code>crafting_special_bannerduplicate</code>
+
  | generic.luck
  | Recipe for copying banner patterns
+
  | 0.0
  | None
+
  | -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
  | <code>crafting_special_banneraddpattern</code>
+
  | horse.jump_strength
  | Recipe for adding patterns to banners
+
  | 0.7
  | None
+
  | 0.0
 +
| 2.0
 +
| Jump Strength.
 
  |-
 
  |-
  | <code>crafting_special_shielddecoration</code>
+
  | zombie.spawn_reinforcements
  | Recipe for applying a banner's pattern to a shield
+
  | 0.0
  | None
+
  | 0.0
 +
| 1.0
 +
| Spawn Reinforcements Chance.
 +
|-
 +
| generic.reachDistance
 +
| 5.0
 +
| 0.0
 +
| 1024.0
 +
| Player Reach Distance (Forge only).
 
  |-
 
  |-
  | <code>crafting_special_shulkerboxcoloring</code>
+
  | forge.swimSpeed
  | Recipe for recoloring a shulker box
+
  | 1.0
  | None
+
  | 0.0
 +
| 1024.0
 +
| Swimming Speed (Forge only).
 
  |}
 
  |}
  
Ingredient is defined as:
+
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"
! Name
 
! Type
 
! Description
 
 
  |-
 
  |-
  | Count
+
! Field Name
  | VarInt
+
! Field Type
  | Number of elements in the following array
+
! Notes
 +
|-
 +
| UUID
 +
| UUID
 +
|
 +
|-
 +
  | Amount
 +
  | Double
 +
  | May be positive or negative.
 
  |-
 
  |-
  | Items
+
  | Operation
  | Array of [[Slot]]
+
  | Byte
  | Any item in this array may be used for the recipe.  The count of each item should be 1.
+
  | 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.
  
 
==== Tags ====
 
==== Tags ====
 
{{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.}}
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,925: Line 1,902:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x54
+
  |rowspan="8"| {{change|0x5B|0x66}}
  |rowspan="2"| Play
+
  |rowspan="8"| Play
  |rowspan="2"| Client
+
  |rowspan="8"| Client
  | Block Tags
+
  |- {{removed}}
  | (See below)
+
| colspan="2"| Block Tags
 +
  | colspan="2"| (See below)
 
  | IDs are block IDs
 
  | IDs are block IDs
 +
|- {{removed}}
 +
| colspan="2"| Item Tags
 +
| colspan="2"| (See below)
 +
| IDs are item IDs
 +
|- {{removed}}
 +
| colspan="2"| Fluid Tags
 +
| colspan="2"| (See below)
 +
| IDs are fluid IDs
 +
|- {{removed}}
 +
| colspan="2"| Entity Tags
 +
| colspan="2"| (See below)
 +
| IDs are entity IDs
 +
|- {{added}}
 +
| colspan="2"| Length of the array
 +
| colspan="2"| VarInt
 +
|
 +
|- {{added}}
 +
|rowspan="2"| Array of tags
 +
| Tag type
 +
|rowspan="2"| Array
 +
| Identifier
 +
| Tag identifier (Vanilla required tags are <code>minecraft:block</code>, <code>minecraft:item</code>, <code>minecraft:fluid</code>, <code>minecraft:entity_type</code>, and <code>minecraft:game_event</code>)
 
  |-
 
  |-
  | Item Tags
+
  | Array of Tag
 
  | (See below)
 
  | (See below)
  | IDs are item IDs
+
  |
 
  |}
 
  |}
  
Line 2,964: Line 1,964:
 
  | Entries
 
  | Entries
 
  | Array of VarInt
 
  | Array of VarInt
  | Numeric ID of the block/item.
+
  | Numeric ID of the given type (block, item, etc.).
 
  |}
 
  |}
 +
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Tab-Complete (serverbound) ====
+
==== Client Settings ====
  
Sent when the client needs to tab-complete a <code>minecraft:ask_server</code> suggestion type.
+
Sent when the player connects, or when settings are changed.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,981: Line 1,982:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x01|0x04}}
+
  |rowspan="7"| 0x05
  |rowspan="5"| Play
+
  |rowspan="7"| Play
  |rowspan="5"| Server
+
  |rowspan="7"| Server
  |style="background-color: #d9ead3;"| Transaction Id
+
  | Locale
  |style="background-color: #d9ead3;"| VarInt
+
| String (16)
  |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.
+
| e.g. <code>en_GB</code>.
 +
  |-
 +
| View Distance
 +
| Byte
 +
  | Client-side render distance, in chunks.
 
  |-
 
  |-
  | Text
+
  | Chat Mode
  | String ({{change|32767|256}})
+
  | VarInt Enum
  | All text behind the cursor without the <code>/</code> (e.g. to the left of the cursor in left-to-right languages like English)
+
  | 0: enabled, 1: commands only, 2: hidden. See [[Chat#Processing chat|processing chat]] for more information.
  |- style="background-color: #f4cccc; text-decoration: line-through;"
+
  |-
  | Assume Command
+
  | Chat Colors
 
  | Boolean
 
  | Boolean
  | 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.
+
  | “Colors” multiplayer setting.
  |- style="background-color: #f4cccc; text-decoration: line-through;"
+
|-
  | Has Position
+
| Displayed Skin Parts
 +
| Unsigned Byte
 +
| Bit mask, see below.
 +
  |-
 +
| Main Hand
 +
| VarInt Enum
 +
| 0: Left, 1: Right.
 +
|- {{Added}}
 +
  | Disable text filtering
 
  | Boolean
 
  | Boolean
  |  
+
  | Disables filtering of text on signs and written book titles. Currently always true (i.e. the filtering is disabled)
|- 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 ====
+
''Displayed Skin Parts'' flags:
  
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.
+
* Bit 0 (0x01): Cape enabled
 +
* Bit 1 (0x02): Jacket enabled
 +
* Bit 2 (0x04): Left Sleeve enabled
 +
* Bit 3 (0x08): Right Sleeve enabled
 +
* Bit 4 (0x10): Left Pants Leg enabled
 +
* Bit 5 (0x20): Right Pants Leg enabled
 +
* Bit 6 (0x40): Hat enabled
  
This packet is sent when a player clicks a recipe in the crafting book that is craftable (white border).
+
The most significant bit (bit 7, 0x80) appears to be unused.
 +
 
 +
 
 +
==== Window Confirmation (serverbound) ====
 +
 
 +
If a confirmation sent by the client was not accepted, the server will reply with a [[#Window Confirmation (clientbound)|Window Confirmation (clientbound)]] packet with the Accepted field set to false. When this happens, the client must send this packet to apologize (as with movement), otherwise the server ignores any successive confirmations.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 3,018: Line 2,038:
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
  |-
+
  |- {{ Removed }}
  |rowspan="3"| 0x12
+
  |rowspan="3"| 0x07
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
 
  |rowspan="3"| Server
 
  |rowspan="3"| Server
 
  | Window ID
 
  | Window ID
 
  | Byte
 
  | Byte
  |
+
  | The ID of the window that the action occurred in.
  |-
+
  |- {{ Removed }}
  | Recipe
+
  | Action Number
  | {{Change|VarInt|Identifier}}
+
  | Short
  | A recipe ID
+
  | Every action that is to be accepted has a unique number. This number is an incrementing integer (starting at 1) with separate counts for each window ID.
  |-
+
  |- {{ Removed }}
  | Make all
+
  | Accepted
 
  | Boolean
 
  | Boolean
  | Affects the amount of items processed; true if shift is down when clicked
+
  | Whether the action was accepted.
 
  |}
 
  |}
  
==== Recipe Book Data ====
+
==== Click Window ====
(previously known as Crafting Book Data)
+
 
 +
This packet is sent by the client when the player clicks on a slot in a window.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 3,042: Line 2,063:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  !colspan="2" | Field Name
  ! Field Type
+
  !colspan="2" | Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x17
+
  |rowspan="9"| {{change|0x09|0x08}}
  |rowspan="7"| Play
+
  |rowspan="9"| Play
  |rowspan="7"| Server
+
  |rowspan="9"| Server
  |colspan="2"| Type
+
  |colspan="2" | Window ID
  | VarInt
+
|colspan="2" | Unsigned Byte
  | Determines the format of the rest of the packet
+
|colspan="2" | The ID of the window which was clicked. 0 for player inventory.
 +
|-
 +
|colspan="2" | Slot
 +
|colspan="2" | Short
 +
|colspan="2" | The clicked slot number, see below.
 +
|-
 +
|colspan="2" | Button
 +
|colspan="2" | Byte
 +
|colspan="2" | The button used in the click, see below.
 +
|- {{ Removed }}
 +
|colspan="2" | Action Number
 +
|colspan="2" | Short
 +
|colspan="2" | A unique number for the action, implemented by Notchian as a counter, starting at 1 (different counter for every window ID). Used by the server to send back a [[#Window Confirmation (clientbound)|Window Confirmation (clientbound)]].
 +
|-
 +
|colspan="2" | Mode
 +
|colspan="2" | VarInt Enum
 +
|colspan="2" | Inventory operation mode, see below.
 +
  |- {{ Added }}
 +
| colspan="2"| Length of the array
 +
| colspan="2"| VarInt
 +
  |
 +
|- {{ Added }}
 +
|rowspan="2"| Array of slots
 +
| Slot number
 +
|rowspan="2"| Array
 +
| Short
 +
|
 +
|-
 +
| Slot data
 +
| Slot
 +
| New data for this slot
 +
|-
 +
|colspan="2" | Clicked item
 +
|colspan="2" | [[Slot Data|Slot]]
 +
|colspan="2" | The clicked slot. Has to be empty (item ID = -1) for drop mode. Is always empty for mode 2 and mode 5 packets.
 +
|}
 +
 
 +
See [[Inventory]] for further information about how slots are indexed.
 +
 
 +
When right-clicking on a stack of items, half the stack will be picked up and half left in the slot. If the stack is an odd number, the half left in the slot will be smaller of the amounts.
 +
 
 +
The distinct type of click performed by the client is determined by the combination of the Mode and Button fields.
 +
 
 +
{| class="wikitable"
 +
! Mode
 +
! Button
 +
! Slot
 +
! Trigger
 +
|-
 +
!rowspan="4"| 0
 +
| 0
 +
| Normal
 +
| Left mouse click
 +
|-
 +
| 1
 +
| Normal
 +
| Right mouse click
 +
|-
 +
| 0
 +
| -999
 +
| Left click outside inventory (drop cursor stack)
 +
|-
 +
| 1
 +
| -999
 +
| Right click outside inventory (drop cursor single item)
 +
|-
 +
!rowspan="2"| 1
 +
| 0
 +
| Normal
 +
| Shift + left mouse click
 +
|-
 +
| 1
 +
| Normal
 +
| Shift + right mouse click ''(identical behavior)''
 +
|-
 +
!rowspan="5"| 2
 +
| 0
 +
| Normal
 +
| Number key 1
 +
|-
 +
| 1
 +
| Normal
 +
| Number key 2
 +
|-
 +
| 2
 +
| Normal
 +
| Number key 3
 +
|-
 +
| ⋮
 +
| ⋮
 +
| ⋮
 +
|-
 +
| 8
 +
| Normal
 +
| Number key 9
 +
|-
 +
! 3
 +
| 2
 +
| Normal
 +
| Middle click, only defined for creative players in non-player inventories.
 +
|-
 +
!rowspan="1"| 4
 +
| 0
 +
| Normal*
 +
| Drop key (Q) (* Clicked item is always empty)
 +
|-
 +
!rowspan="9"| 5
 +
| 0
 +
| -999
 +
| Starting left mouse drag
 +
|-
 +
| 4
 +
| -999
 +
| Starting right mouse drag
 +
|-
 +
| 8
 +
| -999
 +
| Starting middle mouse drag, only defined for creative players in non-player inventories.  (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
 +
|-
 +
| 1
 +
| Normal
 +
| Add slot for left-mouse drag
 +
|-
 +
| 5
 +
| Normal
 +
| Add slot for right-mouse drag
 +
|-
 +
| 9
 +
| Normal
 +
| Add slot for middle-mouse drag, only defined for creative players in non-player inventories.  (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
 
  |-
 
  |-
  ! Type
+
  | 2
  ! Field Name
+
  | -999
  !
+
  | Ending left mouse drag
!
 
 
  |-
 
  |-
  | 0: Displayed Recipe
+
  | 6
  | Recipe ID
+
  | -999
  | Int
+
  | Ending right mouse drag
| The internal id of the displayed recipe.
 
 
  |-
 
  |-
  |rowspan="4"| 1: Recipe Book States
+
  | 10
  | Crafting Recipe Book Open
+
  | -999
  | Boolean
+
  | Ending middle mouse drag, only defined for creative players in non-player inventories. (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
  | Whether the player has the crafting recipe book currently openened/active.
 
 
  |-
 
  |-
  | Crafting Recipe Filter Active
+
  ! 6
| Boolean
+
  | 0
| Whether the player has the crafting recipe book filter option currently active.
+
  | Normal
|- style="background-color: #d9ead3;"
+
  | Double click
| 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.
+
Starting from version 1.5, “painting mode” is available for use in inventory windows. It is done by picking up stack of something (more than 1 item), then holding mouse button (left, right or middle) and dragging held stack over empty (or same type in case of right button) slots. In that case client sends the following to server after mouse button release (omitting first pickup packet which is sent as usual):
 +
 
 +
# packet with mode 5, slot -999, button (0 for left | 4 for right);
 +
# packet for every slot painted on, mode is still 5, button (1 | 5);
 +
# packet with mode 5, slot -999, button (2 | 6);
 +
 
 +
If any of the painting packets other than the “progress” ones are sent out of order (for example, a start, some slots, then another start; or a left-click in the middle) the painting status will be reset.
 +
 
 +
The server will send back a [[#Window Confirmation (clientbound)|Window Confirmation]] packet. If the click was not accepted, the client must send a matching [[#Window Confirmation (serverbound)|serverbound window confirmation]] packet before sending more [[#Click Window|Click Window]] packets, otherwise the server will reject them silently. The Notchian server also sends a [[#Window Items|Window Items]] packet for the open window and [[#Set Slot|Set Slot]] packets for the clicked and cursor slot, but only when the click was not accepted, probably to resynchronize client and server.
 +
 
 +
==== Pong ====
 +
 
 +
A response to the ping packet. Unknown what this is used for, this is ignored by the Notchian client and server.
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|- {{added}}
 +
| 0x1D
 +
| Play
 +
| Server
 +
| ID
 +
| Int
 +
|
 +
|}
  
 
== Handshaking ==
 
== Handshaking ==
Line 3,108: Line 2,276:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|340|371}})
+
  | See [[protocol version numbers]] (currently {{change|754|{{Snapshot PVN|1073741839}}}})
 
  |-
 
  |-
 
  | 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 {{change|complete|complete}} redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide {{change|mc.|mc.}}example.org as server address in addition to connecting to it.
 
  |-  
 
  |-  
 
  | Server Port
 
  | Server Port

Latest revision as of 06:26, 8 July 2021

This page documents the changes from the last stable Minecraft release (currently 1.16.5, protocol 754) to the current pre-release (currently 1.17-rc2, protocol Snapshot 35). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

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

Contents

Data types

No changes so far.

Packets

ID Packet name Documentation
Play clientbound
0x05 Sculk Vibration Signal Pre
0x05 0x06 Entity Animation (clientbound) Current (unchanged)
0x06 0x07 Statistics Current (unchanged)
0x07 0x08 Acknowledge Player Digging Current (unchanged)
0x08 0x09 Block Break Animation Current (unchanged)
0x09 0x0A Block Entity Data Current (unchanged)
0x0A 0x0B Block Action Current (unchanged)
0x0B 0x0C Block Change Current (unchanged)
0x0C 0x0D Boss Bar Current (unchanged)
0x0D 0x0E Server Difficulty Current (unchanged)
0x0E 0x0F Chat Message (clientbound) Current (unchanged)
0x10 Clear Titles Pre
0x0F 0x11 Tab-Complete (clientbound) Current (unchanged)
0x10 0x12 Declare Commands Current (unchanged)
0x11 Window Confirmation (clientbound) Current
0x12 0x13 Close Window (clientbound) Current (unchanged)
0x13 0x14 Window Items Current (unchanged)
0x14 0x15 Window Property Current (unchanged)
0x15 0x16 Set Slot Current (unchanged)
0x16 0x17 Set Cooldown Current (unchanged)
0x17 0x18 Plugin Message (clientbound) Current (unchanged)
0x18 0x19 Named Sound Effect Current (unchanged)
0x19 0x1A Disconnect (play) Current (unchanged)
0x1A 0x1B Entity Status Current (unchanged)
0x1B 0x1C Explosion Current Pre
0x1C 0x1D Unload Chunk Current (unchanged)
0x1D 0x1E Change Game State Current (unchanged)
0x1E 0x1F Open Horse Window Current (unchanged)
0x20 Initialize World Border Pre
0x1F 0x21 Keep Alive (clientbound) Current (unchanged)
0x20 0x22 Chunk Data Current Pre
0x21 0x23 Effect Current (unchanged)
0x22 0x24 Particle Current (unchanged)
0x23 0x25 Update Light Current Pre
0x24 0x26 Join Game Current Pre
0x25 0x27 Map Data Current Pre
0x26 0x28 Trade List Current (unchanged)
0x27 0x29 Entity Position Current (unchanged)
0x28 0x2A Entity Position and Rotation Current (unchanged)
0x29 0x2B Entity Rotation Current (unchanged)
0x2A Entity Movement Current
0x2B 0x2C Vehicle Move (clientbound) Current (unchanged)
0x2C 0x2D Open Book Current (unchanged)
0x2D 0x2E Open Window Current (unchanged)
0x2E 0x2F Open Sign Editor Current (unchanged)
0x30 Ping Pre
0x2F 0x31 Craft Recipe Response Current (unchanged)
0x30 0x32 Player Abilities (clientbound) Current (unchanged)
0x31 Combat Event Current
0x33 End Combat Event Pre
0x34 Enter Combat Event Pre
0x35 Death Combat Event Pre
0x32 0x36 Player Info Current (unchanged)
0x33 0x37 Face Player Current (unchanged)
0x36 Destroy Entities Current
0x34 0x38 Player Position And Look (clientbound) Current Pre
0x35 0x39 Unlock Recipes Current (unchanged)
0x3A Destroy Entity Pre
0x37 0x3B Remove Entity Effect Current (unchanged)
0x38 0x3C Resource Pack Send Current Pre
0x39 0x3D Respawn Current (unchanged)
0x3A 0x3E Entity Head Look Current (unchanged)
0x3B 0x3F Multi Block Change Current (unchanged)
0x3C 0x40 Select Advancement Tab Current (unchanged)
0x41 Action Bar Pre
0x42 World Border Center Pre
0x43 World Border Lerp Size Pre
0x44 World Border Size Pre
0x45 World Border Warning Delay Pre
0x46 World Border Warning Reach Pre
0x3E 0x47 Camera Current (unchanged)
0x3F 0x48 Held Item Change (clientbound) Current (unchanged)
0x40 0x49 Update View Position Current (unchanged)
0x41 0x4A Update View Distance Current (unchanged)
0x42 0x4B Spawn Position Current Pre
0x43 0x4C Display Scoreboard Current (unchanged)
0x44 0x4D Entity Metadata Current (unchanged)
0x45 0x4E Attach Entity Current (unchanged)
0x46 0x4F Entity Velocity Current (unchanged)
0x47 0x50 Entity Equipment Current (unchanged)
0x4F Title Current
0x48 0x51 Set Experience Current (unchanged)
0x49 0x52 Update Health Current (unchanged)
0x4A 0x53 Scoreboard Objective Current (unchanged)
0x4B 0x54 Set Passengers Current (unchanged)
0x4C 0x55 Teams Current (unchanged)
0x4D 0x56 Update Score Current (unchanged)
0x57 Set Title SubTitle Pre
0x4E 0x58 Time Update Current (unchanged)
0x59 Set Title Text Pre
0x5A Set Title Time Pre
0x50 0x5B Entity Sound Effect Current (unchanged)
0x51 0x5C Sound Effect Current (unchanged)
0x52 0x5D Stop Sound Current (unchanged)
0x53 0x5E Player List Header And Footer Current (unchanged)
0x54 0x5F NBT Query Response Current (unchanged)
0x55 0x60 Collect Item Current (unchanged)
0x56 0x61 Entity Teleport Current (unchanged)
0x57 0x62 Advancements Current (unchanged)
0x58 0x63 Entity Properties Current Pre
0x59 0x64 Entity Effect Current (unchanged)
0x5A 0x65 Declare Recipes Current (unchanged)
0x5B 0x66 Tags Current Pre
Play serverbound
0x05 Client Settings Current Pre
0x07 Window Confirmation (serverbound) Current
0x08 0x07 Click Window Button Current (unchanged)
0x09 0x08 Click Window Current Pre
0x0A 0x09 Close Window (serverbound) Current (unchanged)
0x0B 0x0A Plugin Message (serverbound) Current (unchanged)
0x0C 0x0B Edit Book Current (unchanged)
0x0D 0x0C Query Entity NBT Current (unchanged)
0x0E 0x0D Interact Entity Current (unchanged)
0x0F 0x0E Generate Structure Current (unchanged)
0x10 0x0F Keep Alive (serverbound) Current (unchanged)
0x11 0x10 Lock Difficulty Current (unchanged)
0x12 0x11 Player Position Current (unchanged)
0x13 0x12 Player Position And Rotation (serverbound) Current (unchanged)
0x14 0x13 Player Rotation Current (unchanged)
0x15 0x14 Player Movement Current (unchanged)
0x16 0x15 Vehicle Move (serverbound) Current (unchanged)
0x17 0x16 Steer Boat Current (unchanged)
0x18 0x17 Pick Item Current (unchanged)
0x19 0x18 Craft Recipe Request Current (unchanged)
0x1A 0x19 Player Abilities (serverbound) Current (unchanged)
0x1B 0x1A Player Digging Current (unchanged)
0x1C 0x1B Entity Action Current (unchanged)
0x1D 0x1C Steer Vehicle Current (unchanged)
0x1D Pong Pre
Handshaking serverbound
0x00 Handshake Current Pre

New/modified data types

No changes so far.

Entity Metadata

Warning.png Note that other entities have had metadata shifts due to these changes, not shown here.

Entity

The base class.

Index Type Meaning Default
0 Byte Bit mask Meaning 0
0x01 Is on fire
0x02 Is crouching
0x04 Unused (previously riding)
0x08 Is sprinting
0x10 Is swimming
0x20 Is invisible
0x40 has glowing effect
0x80 Is flying with an elytra
1 VarInt Air ticks 300
2 OptChat Custom name empty
3 Boolean Is custom name visible false
4 Boolean Is silent false
5 Boolean Has no gravity false
6 Pose Pose STANDING
7 VarInt Ticks frozen in powdered snow 0

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Sculk Vibration Signal

Packet ID State Bound To Field Name Field Type Notes
0x05 Play Client Source Position Position Source position for the vibration.
Destination Identifier Identifier Identifier of the destination codec type.
Destination Varies Vanilla default destinations are a block position encoded as a Position for "block" or an entity id encoded as a VarInt for "entity".
Arrival Ticks VarInt Ticks for the signal to arrive at the destination.

This packet shows a permanent particle.

Clear Titles

Packet ID State Bound To Field Name Field Type Notes
0x10 Play Client
Reset Boolean

Explosion

Sent when an explosion occurs (creepers, TNT, and ghast fireballs).

Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x

Packet ID State Bound To Field Name Field Type Notes
0x1B 0x1C Play Client X Float
Y Float
Z Float
Strength Float A strength greater than or equal to 2.0 spawns a minecraft:explosion_emitter particle, while a lesser strength spawns a minecraft:explosion particle.
Record Count Int VarInt Number of elements in the following array.
Records Array of (Byte, Byte, Byte) Each record is 3 signed bytes long; the 3 bytes are the XYZ (respectively) signed offsets of affected blocks.
Player Motion X Float X velocity of the player being pushed by the explosion.
Player Motion Y Float Y velocity of the player being pushed by the explosion.
Player Motion Z Float Z velocity of the player being pushed by the explosion.

Initialize World Border

Packet ID State Bound To Field Name Field Type Notes
0x20 Play Client X Double
Z Double
Old Diameter Double Current length of a single side of the world border, in meters.
New Diameter Double Target length of a single side of the world border, in meters.
Speed VarLong Number of real-time milliseconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.
Portal Teleport Boundary VarInt Resulting coordinates from a portal teleport are limited to ±value. Usually 29999984.
Warning Blocks VarInt In meters.
Warning Time VarInt In seconds as set by /worldborder warning time.

The Notchian client determines how solid to display the warning by comparing to whichever is higher, the warning distance or whichever is lower, the distance from the current diameter to the target diameter or the place the border will be after warningTime seconds. In pseudocode:

distance = max(min(resizeSpeed * 1000 * warningTime, abs(targetDiameter - currentDiameter)), warningDistance);
if (playerDistance < distance) {
    warning = 1.0 - playerDistance / distance;
} else {
    warning = 0.0;
}

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 dimension 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
0x20 0x22 Play Client Chunk X Int Chunk coordinate (block coordinate divided by 16, rounded down)
Chunk Z Int Chunk coordinate (block coordinate divided by 16, rounded down)
Full chunk Boolean See Chunk Format
Primary Bit Mask VarInt Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
Bit Mask Length VarInt Length of the following array
Primary Bit Mask Array of Long BitSet with bits (world height in blocks / 16) 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 the lowest y to 15 blocks above).
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; should always be 1024. Not present if full chunk is false.
Biomes Optional Array of VarInt 1024 biome IDs, ordered by x then z then y, in 4×4×4 blocks. Not present if full chunk is false. See Chunk Format § Biomes.
Size VarInt Size of Data in bytes
Data Byte array See data structure in Chunk Format
Number of block entities VarInt Number of elements in the following array
Block entities Array of NBT Tag All block entities in the chunk. Use the x, y, and z tags in the NBT to determine their positions.

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

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

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

0020863148418841 0000000000100000100001100011000101001000010000011000100001000001
01018A7260F68C87 0000000100000001100010100111001001100000111101101000110010000111

Entity Movement

This packet may be used to initialize an entity.

For player entities, either this packet or any move/look packet is sent every game tick. So the meaning of this packet is basically that the entity did not move/look since the last such packet.

Packet ID State Bound To Field Name Field Type Notes
0x2A Play Client Entity ID VarInt

Ping

Unknown what this packet does just yet, not used by the Notchian server or client.

Packet ID State Bound To Field Name Field Type Notes
0x30 Play Client ID Int

Update Light

Updates light levels for a chunk.

Packet ID State Bound To Field Name Field Type Notes
0x23 0x25 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.
Length 1 VarInt Length of the following array
Sky Light Mask Array of Long BitSet containing bits for each sections in the world + 2 (lowest bit 16-1 blocks below min world height, highest 1-16 above max world height)
Length 2 VarInt Length of the following array
Block Light Mask Array of Long BitSet containing bits for each sections in the world + 2, same order as sky light
Length 3 VarInt Length of the following array
Empty Sky Light Mask Array of Long BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their sky light values
Length 4 VarInt Length of the following array
Empty Block Light Mask Array of Long BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their block light values
Sky Light array count VarInt Number of entries in the following array
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 array count VarInt Number of entries in the following array
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.

Join Game

See Protocol Encryption for information on logging in.

Packet ID State Bound To Field Name Field Type Notes
0x24 0x26 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.
Previous Gamemode Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. Defaults to -1 if there is no 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 NBT Tag Compound Valid dimensions are defined per dimension registry sent before this. The structure of this tag is a dimension type (see below).
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. Used client side for biome noise
Max Players VarInt Was once used by the client to draw the player list, but now is ignored.
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.


The Dimension Codec NBT Tag Compound (Default value in SNBT) includes two registries: "minecraft:dimension_type" and "minecraft:worldgen/biome".

Name Type Notes
minecraft:dimension_type TAG_Compound The dimension type registry (see below).
minecraft:worldgen/biome TAG_Compound The biome registry (see below).

Dimension type registry:

Name Type Notes
type TAG_String The name of the registry. Always "minecraft:dimension_type".
value TAG_List List of dimension types registry entries (see below).

Dimension type registry entry:

Name Type Notes
name TAG_String The name of the dimension type (for example, "minecraft:overworld").
id TAG_Int The protocol ID of the dimension (matches the index of the element in the registry list).
element TAG_Compound The dimension type (see below).

Dimension type:

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

Biome registry:

Name Type Notes
type TAG_String The name of the registry. Always "minecraft:worldgen/biome".
value TAG_List List of biome registry entries (see below).

Biome registry entry:

Name Type Notes
name TAG_String The name of the biome (for example, "minecraft:ocean").
id TAG_Int The protocol ID of the biome (matches the index of the element in the registry list).
element TAG_Compound The biome properties (see below).

Biome properties:

Name Type Meaning Values
precipitation TAG_String The type of precipitation in the biome. "rain", "snow", or "none".
depth TAG_Float The depth factor of the biome. The default values vary between 1.5 and -1.8.
temperature TAG_Float The temperature factor of the biome. The default values vary between 2.0 and -0.5.
scale TAG_Float ? The default values vary between 1.225 and 0.0.
downfall TAG_Float ? The default values vary between 1.0 and 0.0.
category TAG_String The category of the biome. Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
temperature_modifier Optional TAG_String ? The only known value is "frozen".
effects sky_color TAG_Compound TAG_Int The color of the sky. Example: 8364543, which is #7FA1FF in RGB.
water_fog_color TAG_Int Possibly the tint color when swimming. Example: 8364543, which is #7FA1FF in RGB.
fog_color TAG_Int Possibly the color of the fog effect when looking past the view distance. Example: 8364543, which is #7FA1FF in RGB.
water_color TAG_Int The tint color of the water blocks. Example: 8364543, which is #7FA1FF in RGB.
foliage_color Optional TAG_Int The tint color of the grass. Example: 8364543, which is #7FA1FF in RGB.
grass_color Optional TAG_Int ? Example: 8364543, which is #7FA1FF in RGB.
grass_color_modifier Optional TAG_String Unknown, likely affects foliage color. If set, known values are "swamp" and "dark_forest".
music Optional TAG_Compound Music properties for the biome. If present, contains the fields: replace_current_music (TAG_Byte), sound (TAG_String), max_delay (TAG_Int), min_delay (TAG_Int).
ambient_sound Optional TAG_String Ambient soundtrack. If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
additions_sound Optional TAG_Compound Additional ambient sound that plays randomly. If present, contains the fields: sound (TAG_String), tick_chance (TAG_Double).
mood_sound Optional TAG_Compound Additional ambient sound that plays at an interval. If present, contains the fields: sound (TAG_String), tick_delay (TAG_Int), offset (TAG_Double), block_search_extent (TAG_Int).
particle Optional TAG_Compound Particles that appear randomly in the biome. If present, contains the fields: probability (TAG_Float), options (TAG_Compound). The "options" compound contains the field "type" (TAG_String), which identifies the particle type.

Map Data

Updates a rectangular area on a map item.

Packet ID State Bound To Field Name Field Type Notes
0x25 0x27 Play Client Map ID VarInt Map ID of the map being modified
Scale Byte From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
Tracking Position Boolean Specifies whether player and item frame icons are shown
Locked Boolean True if the map has been locked in a cartography table
Tracking Position Boolean Specifies whether player and item frame icons are shown
Icon Count VarInt Number of elements in the following array. Only present if "Tracking Position" is true.
Icon Type Array VarInt enum See below
X Byte Map coordinates: -128 for furthest left, +127 for furthest right
Z Byte Map coordinates: -128 for highest, +127 for lowest
Direction Byte 0-15
Has Display Name Boolean
Display Name Optional Chat Only present if previous Boolean is true
Columns Unsigned Byte Number of columns updated
Rows Optional Byte Only if Columns is more than 0; number of rows updated
X Optional Byte Only if Columns is more than 0; x offset of the westernmost column
Z Optional Byte Only if Columns is more than 0; z offset of the northernmost row
Length Optional VarInt Only if Columns is more than 0; length of the following array
Data Optional Array of Unsigned Byte Only if Columns is more than 0; see Map item format

For icons, a direction of 0 is a vertical icon and increments by 22.5° (360/16).

Types are based off of rows and columns in map_icons.png:

Icon type Result
0 White arrow (players)
1 Green arrow (item frames)
2 Red arrow
3 Blue arrow
4 White cross
5 Red pointer
6 White circle (off-map players)
7 Small white circle (far-off-map players)
8 Mansion
9 Temple
10 White Banner
11 Orange Banner
12 Magenta Banner
13 Light Blue Banner
14 Yellow Banner
15 Lime Banner
16 Pink Banner
17 Gray Banner
18 Light Gray Banner
19 Cyan Banner
20 Purple Banner
21 Blue Banner
22 Brown Banner
23 Green Banner
24 Red Banner
25 Black Banner
26 Treasure marker

Combat Event

Originally used for metadata for twitch streaming circa 1.8. Now only used to display the game over screen (with enter combat and end combat completely ignored by the Notchain client)

Packet ID State Bound To Field Name Field Type Notes
0x31 Play Client Event VarInt Enum Determines the layout of the remaining packet.
Event Field Name
0: enter combat no fields no fields
1: end combat Duration VarInt Length of the combat in ticks.
Entity ID Int ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
2: entity dead Player ID VarInt Entity ID of the player that died (should match the client's entity ID).
Entity ID Int The killing entity's ID, or -1 if there is no obvious killer.
Message Chat The death message.

End Combat Event

Unused by the Notchain client.

Packet ID State Bound To Field Name Field Type Notes
0x33 Play Client Duration VarInt Length of the combat in ticks.
Entity ID Int ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.

Enter Combat Event

Unused by the Notchain client.

Packet ID State Bound To Field Name Field Type Notes
0x34 Play Client


Death Combat Event

Used to send a respawn screen.

Packet ID State Bound To Field Name Field Type Notes
0x35 Play Client Player ID VarInt Entity ID of the player that died (should match the client's entity ID).
Entity ID Int The killing entity's ID, or -1 if there is no obvious killer.
Message Chat The death message.

Player Position And Look (clientbound)

Updates the player's position on the server. This packet will also close the “Downloading Terrain” screen when joining/respawning.

If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 meters, the client will be kicked for “You moved too quickly :( (Hacking?)”.

Also if the fixed-point number of X or Z is set greater than 3.2E7D the client will be kicked for “Illegal position”.

Yaw is measured in degrees, and does not follow classical trigonometry rules. The unit circle of yaw on the XZ-plane starts at (0, 1) and turns counterclockwise, with 90 at (-1, 0), 180 at (0, -1) and 270 at (1, 0). Additionally, yaw is not clamped to between 0 and 360 degrees; any number is valid, including negative numbers and numbers greater than 360.

Pitch is measured in degrees, where 0 is looking straight ahead, -90 is looking straight up, and 90 is looking straight down.

Packet ID State Bound To Field Name Field Type Notes
0x34 0x38 Play Client X Double Absolute or relative position, depending on Flags.
Y Double Absolute or relative position, depending on Flags.
Z Double Absolute or relative position, depending on Flags.
Yaw Float Absolute or relative rotation on the X axis, in degrees.
Pitch Float Absolute or relative rotation on the Y axis, in degrees.
Flags Byte Bit field, see below.
Teleport ID VarInt Client should confirm this packet with Teleport Confirm containing the same Teleport ID.
Dismount Vehicle Boolean True if the player should dismount their vehicle.

About the Flags field:

<Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
Field Bit
X 0x01
Y 0x02
Z 0x04
Y_ROT 0x08
X_ROT 0x10

Destroy Entity

Sent by the server when a list of entities an entity is to be destroyed on the client.

Packet ID State Bound To Field Name Field Type Notes
0x3A Play Client
Count VarInt Number of elements in the following array.
Array of VarInt The list of entities of destroy.
Entity ID VarInt

Resource Pack Send

Packet ID State Bound To Field Name Field Type Notes
0x38 0x3C Play Client URL String (32767) The URL to the resource pack.
Hash String (40) A 40 character hexadecimal and lowercase SHA-1 hash of the resource pack file. (must be lower case in order to work)
If it's not a 40 character hexadecimal string, the client will not use it for hash verification and likely waste bandwidth — but it will still treat it as a unique id
Forced Boolean The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.
Forced Message Chat This is sent with the force resourcepack popup.

Title

Packet ID State Bound To Field Name Field Type Notes
0x4F Play Client Action VarInt Enum
Action Field Name
0: set title Title Text Chat
1: set subtitle Subtitle Text Chat
2: set action bar Action bar text Chat Displays a message above the hotbar (the same as position 2 in Chat Message (clientbound).
3: set times and display Fade In Int Ticks to spend fading in.
Stay Int Ticks to keep the title displayed.
Fade Out Int Ticks to spend out, not when to start fading out.
4: hide no fields no fields
5: reset no fields no fields

“Hide” makes the title disappear, but if you run times again the same title will appear. “Reset” erases the text.

The title is visible on screen for Fade In + Stay + Fade Out ticks.

Action Bar

Packet ID State Bound To Field Name Field Type Notes
0x41 Play Client Action bar text Chat Displays a message above the hotbar (the same as position 2 in Chat Message (clientbound).

World Border Center

Packet ID State Bound To Field Name Field Type Notes
0x42 Play Client X Double
Z Double

World Border Lerp Size

Packet ID State Bound To Field Name Field Type Notes
0x43 Play Client Old Diameter Double Current length of a single side of the world border, in meters.
New Diameter Double Target length of a single side of the world border, in meters.
Speed VarLong Number of real-time milliseconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.

World Border Size

Packet ID State Bound To Field Name Field Type Notes
0x44 Play Client Diameter Double Length of a single side of the world border, in meters.

World Border Warning Delay

Packet ID State Bound To Field Name Field Type Notes
0x45 Play Client Warning Time VarInt In seconds as set by /worldborder warning time.

World Border Warning Reach

Packet ID State Bound To Field Name Field Type Notes
0x46 Play Client Warning Blocks VarInt In meters.

Spawn Position

Sent by the server after login to specify the coordinates of the spawn point (the point at which players spawn at, and which the compass points to). It can be sent at any time to update the point compasses point at.

Packet ID State Bound To Field Name Field Type Notes
0x42 0x4B Play Client Location Position Spawn location.
Angle Float

Set Title SubTitle

Packet ID State Bound To Field Name Field Type Notes
0x57 Play Client Subtitle Text Chat


Set Title Text

Packet ID State Bound To Field Name Field Type Notes
0x59 Play Client Title Text Chat

Set Title Time

Packet ID State Bound To Field Name Field Type Notes
0x5A Play Client Fade In Int Ticks to spend fading in.
Stay Int Ticks to keep the title displayed.
Fade Out Int Ticks to spend out, not when to start fading out.


Entity Properties

Sets attributes on the given entity.

Packet ID State Bound To Field Name Field Type Notes
0x58 0x63 Play Client Entity ID VarInt
Number Of Properties Int VarInt Number of elements in the following array.
Property Key Array 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.max_health 20.0 0.0 1024.0 Max Health.
generic.follow_range 32.0 0.0 2048.0 Follow Range.
generic.knockback_resistance 0.0 0.0 1.0 Knockback Resistance.
generic.movement_speed 0.7 0.0 1024.0 Movement Speed.
generic.attack_damage 2.0 0.0 2048.0 Attack Damage.
generic.attack_speed 4.0 0.0 1024.0 Attack Speed.
generic.flying_speed 0.4 0.0 1024.0 Flying Speed.
generic.armor 0.0 0.0 30.0 Armor.
generic.armor_toughness 0.0 0.0 20.0 Armor Toughness.
generic.attack_knockback 0.0 0.0 5.0
generic.luck 0.0 -1024.0 1024.0 Luck.
horse.jump_strength 0.7 0.0 2.0 Jump Strength.
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.

Tags

Packet ID State Bound To Field Name Field Type Notes
0x5B 0x66 Play Client
Block Tags (See below) IDs are block IDs
Item Tags (See below) IDs are item IDs
Fluid Tags (See below) IDs are fluid IDs
Entity Tags (See below) IDs are entity IDs
Length of the array VarInt
Array of tags Tag type Array Identifier Tag identifier (Vanilla required tags are minecraft:block, minecraft:item, minecraft:fluid, minecraft:entity_type, and minecraft:game_event)
Array of Tag (See below)

Tags look like:

Field Name Field Type Notes
Length VarInt Number of elements in the following array
Tags Tag name Array Identifier
Count VarInt Number of elements in the following array
Entries Array of VarInt Numeric ID of the given type (block, item, etc.).


Serverbound

Client Settings

Sent when the player connects, or when settings are changed.

Packet ID State Bound To Field Name Field Type Notes
0x05 Play Server Locale String (16) e.g. en_GB.
View Distance Byte Client-side render distance, in chunks.
Chat Mode VarInt Enum 0: enabled, 1: commands only, 2: hidden. See processing chat for more information.
Chat Colors Boolean “Colors” multiplayer setting.
Displayed Skin Parts Unsigned Byte Bit mask, see below.
Main Hand VarInt Enum 0: Left, 1: Right.
Disable text filtering Boolean Disables filtering of text on signs and written book titles. Currently always true (i.e. the filtering is disabled)

Displayed Skin Parts flags:

  • Bit 0 (0x01): Cape enabled
  • Bit 1 (0x02): Jacket enabled
  • Bit 2 (0x04): Left Sleeve enabled
  • Bit 3 (0x08): Right Sleeve enabled
  • Bit 4 (0x10): Left Pants Leg enabled
  • Bit 5 (0x20): Right Pants Leg enabled
  • Bit 6 (0x40): Hat enabled

The most significant bit (bit 7, 0x80) appears to be unused.


Window Confirmation (serverbound)

If a confirmation sent by the client was not accepted, the server will reply with a Window Confirmation (clientbound) packet with the Accepted field set to false. When this happens, the client must send this packet to apologize (as with movement), otherwise the server ignores any successive confirmations.

Packet ID State Bound To Field Name Field Type Notes
0x07 Play Server Window ID Byte The ID of the window that the action occurred in.
Action Number Short Every action that is to be accepted has a unique number. This number is an incrementing integer (starting at 1) with separate counts for each window ID.
Accepted Boolean Whether the action was accepted.

Click Window

This packet is sent by the client when the player clicks on a slot in a window.

Packet ID State Bound To Field Name Field Type Notes
0x09 0x08 Play Server Window ID Unsigned Byte The ID of the window which was clicked. 0 for player inventory.
Slot Short The clicked slot number, see below.
Button Byte The button used in the click, see below.
Action Number Short A unique number for the action, implemented by Notchian as a counter, starting at 1 (different counter for every window ID). Used by the server to send back a Window Confirmation (clientbound).
Mode VarInt Enum Inventory operation mode, see below.
Length of the array VarInt
Array of slots Slot number Array Short
Slot data Slot New data for this slot
Clicked item Slot The clicked slot. Has to be empty (item ID = -1) for drop mode. Is always empty for mode 2 and mode 5 packets.

See Inventory for further information about how slots are indexed.

When right-clicking on a stack of items, half the stack will be picked up and half left in the slot. If the stack is an odd number, the half left in the slot will be smaller of the amounts.

The distinct type of click performed by the client is determined by the combination of the Mode and Button fields.

Mode Button Slot Trigger
0 0 Normal Left mouse click
1 Normal Right mouse click
0 -999 Left click outside inventory (drop cursor stack)
1 -999 Right click outside inventory (drop cursor single item)
1 0 Normal Shift + left mouse click
1 Normal Shift + right mouse click (identical behavior)
2 0 Normal Number key 1
1 Normal Number key 2
2 Normal Number key 3
8 Normal Number key 9
3 2 Normal Middle click, only defined for creative players in non-player inventories.
4 0 Normal* Drop key (Q) (* Clicked item is always empty)
5 0 -999 Starting left mouse drag
4 -999 Starting right mouse drag
8 -999 Starting middle mouse drag, only defined for creative players in non-player inventories. (Note: the vanilla client will still incorrectly send this for non-creative players - see MC-46584)
1 Normal Add slot for left-mouse drag
5 Normal Add slot for right-mouse drag
9 Normal Add slot for middle-mouse drag, only defined for creative players in non-player inventories. (Note: the vanilla client will still incorrectly send this for non-creative players - see MC-46584)
2 -999 Ending left mouse drag
6 -999 Ending right mouse drag
10 -999 Ending middle mouse drag, only defined for creative players in non-player inventories. (Note: the vanilla client will still incorrectly send this for non-creative players - see MC-46584)
6 0 Normal Double click

Starting from version 1.5, “painting mode” is available for use in inventory windows. It is done by picking up stack of something (more than 1 item), then holding mouse button (left, right or middle) and dragging held stack over empty (or same type in case of right button) slots. In that case client sends the following to server after mouse button release (omitting first pickup packet which is sent as usual):

  1. packet with mode 5, slot -999, button (0 for left | 4 for right);
  2. packet for every slot painted on, mode is still 5, button (1 | 5);
  3. packet with mode 5, slot -999, button (2 | 6);

If any of the painting packets other than the “progress” ones are sent out of order (for example, a start, some slots, then another start; or a left-click in the middle) the painting status will be reset.

The server will send back a Window Confirmation packet. If the click was not accepted, the client must send a matching serverbound window confirmation packet before sending more Click Window packets, otherwise the server will reject them silently. The Notchian server also sends a Window Items packet for the open window and Set Slot packets for the clicked and cursor slot, but only when the click was not accepted, probably to resynchronize client and server.

Pong

A response to the ping packet. Unknown what this is used for, this is ignored by the Notchian client and server.

Packet ID State Bound To Field Name Field Type Notes
0x1D Play Server ID Int

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 754 Snapshot 15)
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 complete redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide mc. mc.example.org as server address in addition to connecting to it.
Server Port Unsigned Short Default is 25565. The Notchian server does not use this information.
Next State VarInt Enum 1 for status, 2 for login

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.