Difference between revisions of "Pre-release protocol"

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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|1.13-pre2, protocol 384]]). 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|21w07a, protocol {{Snapshot PVN|1073741839}}]]). 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/18w22c.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.18w22c.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|{{change|0x0F|0x10}}|Tab-Complete (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x11}}|Declare Commands|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Window Confirmation (clientbound)|pre=unchanged}}
 
{{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|pre=unchanged}}
{{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|{{change|0x1F|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x20|0x21}}|Chunk Data}}
 
{{PacketList|{{change|0x20|0x21}}|Chunk Data}}
 
{{PacketList|{{change|0x21|0x22}}|Effect|pre=unchanged}}
 
{{PacketList|{{change|0x21|0x22}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x22|0x23}}|Spawn Particle}}
+
{{PacketList|{{change|0x22|0x23}}|Particle|pre=unchanged}}
{{PacketList|{{change|0x23|0x24}}|Join Game|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x24}}|Update Light}}
{{PacketList|{{change|0x24|0x25}}|Map}}
+
{{PacketList|{{change|0x24|0x25}}|Join Game|pre=unchanged}}
{{PacketList|{{change|0x25|0x26}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x26}}|Map Data}}
{{PacketList|{{change|0x26|0x27}}|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x27}}|Trade List|pre=unchanged}}
{{PacketList|{{change|0x27|0x28}}|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x28}}|Entity Position|pre=unchanged}}
{{PacketList|{{change|0x28|0x29}}|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x29}}|Entity Position and Rotation|pre=unchanged}}
{{PacketList|{{change|0x29|0x2A}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x29|0x2A}}|Entity Rotation|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2B}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x2A|0x2B}}|Entity Movement|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Craft Recipe Response}}
+
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2D}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2D}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2E}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2E}}|Open Window|pre=unchanged}}
{{PacketList|{{change|0x2E|0x2F}}|Player List Item|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x2F}}|Open Sign Editor|pre=unchanged}}
{{PacketList|0x30|Face Player|rel=added}}
+
{{PacketList|{{change|0x2F|0x30}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x30|0x31}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x30|0x32}}|Use Bed|pre=unchanged}}
+
{{PacketList|{{change|0x31|0x32}}|Combat Event|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Unlock Recipes}}
+
{{PacketList|{{change|0x32|0x33}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x34}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x33|0x35}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x35}}|Player Position And Look (clientbound)}}
{{PacketList|{{change|0x34|0x36}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x36}}|Unlock Recipes|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Respawn|pre=unchanged}}
+
{{PacketList|{{change|0x36|0x37}}|Destroy Entities|pre=unchanged}}
{{PacketList|{{change|0x36|0x38}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x38}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x39}}|Resource Pack Send}}
{{PacketList|{{change|0x38|0x3A}}|World Border|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x3A}}|Respawn|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x3B}}|Entity Head Look|pre=unchanged}}
{{PacketList|{{change|0x3A|0x3C}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x3C}}|Multi Block Change|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|Display Scoreboard|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x3D}}|Select Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x3C|0x3E}}|Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x3D|0x3E}}|World Border|pre=unchanged}}
{{PacketList|{{change|0x3D|0x3F}}|Attach Entity|pre=unchanged}}
+
{{PacketList|{{change|0x3E|0x3F}}|Camera|pre=unchanged}}
{{PacketList|{{change|0x3E|0x40}}|Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x3F|0x40}}|Held Item Change (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x3F|0x41}}|Entity Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x40|0x41}}|Update View Position|pre=unchanged}}
{{PacketList|{{change|0x40|0x42}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x42}}|Update View Distance|pre=unchanged}}
{{PacketList|{{change|0x41|0x43}}|Update Health|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x43}}|Spawn Position|pre=unchanged}}
{{PacketList|{{change|0x42|0x44}}|Scoreboard Objective}}
+
{{PacketList|{{change|0x43|0x44}}|Display Scoreboard|pre=unchanged}}
{{PacketList|{{change|0x43|0x45}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x44|0x45}}|Entity Metadata|pre=unchanged}}
{{PacketList|{{change|0x44|0x46}}|Teams}}
+
{{PacketList|{{change|0x45|0x46}}|Attach Entity|pre=unchanged}}
{{PacketList|{{change|0x45|0x47}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x46|0x47}}|Entity Velocity|pre=unchanged}}
{{PacketList|{{change|0x46|0x48}}|Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x47|0x48}}|Entity Equipment|pre=unchanged}}
{{PacketList|{{change|0x47|0x49}}|Time Update|pre=unchanged}}
+
{{PacketList|{{change|0x48|0x49}}|Set Experience|pre=unchanged}}
{{PacketList|{{change|0x48|0x4A}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x49|0x4A}}|Update Health|pre=unchanged}}
{{PacketList|0x4B|Stop Sound|rel=added}}
+
{{PacketList|{{change|0x4A|0x4B}}|Scoreboard Objective|pre=unchanged}}
{{PacketList|{{change|0x49|0x4C}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x4B|0x4C}}|Set Passengers|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4D}}|Player List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x4C|0x4D}}|Teams|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4E}}|Collect Item|pre=unchanged}}
+
{{PacketList|{{change|0x4D|0x4E}}|Update Score|pre=unchanged}}
{{PacketList|{{change|0x4C|0x4F}}|Entity Teleport|pre=unchanged}}
+
{{PacketList|{{change|0x4E|0x4F}}|Time Update|pre=unchanged}}
{{PacketList|{{change|0x4D|0x50}}|Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x4F|0x50}}|Title|pre=unchanged}}
{{PacketList|{{change|0x4E|0x51}}|Entity Properties|pre=unchanged}}
+
{{PacketList|{{change|0x50|0x51}}|Entity Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x4F|0x52}}|Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x51|0x52}}|Sound Effect|pre=unchanged}}
{{PacketList|0x53|Declare Recipes|rel=added}}
+
{{PacketList|{{change|0x52|0x53}}|Stop Sound|pre=unchanged}}
{{PacketList|0x54|Tags|rel=added}}
+
{{PacketList|{{change|0x53|0x54}}|Player List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x55}}|NBT Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x56}}|Collect Item|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x57}}|Entity Teleport|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x58}}|Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x59}}|Entity Properties|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5A}}|Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5B}}|Declare Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5C}}|Tags}}
 
  |-
 
  |-
 
!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|{{change|0x04|0x03}}|Client Settings|pre=unchanged}}
+
!colspan="4"| Handshaking serverbound
{{PacketList|{{change|0x01|0x04}}|Tab-Complete (serverbound)}}
+
{{PacketList|0x00|Handshake}}
{{PacketList|0x12|Craft Recipe Request}}
 
{{PacketList|0x17|Recipe Book Data}}
 
 
  |}
 
  |}
  
 
== 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
 
|-
 
| <code>minecraft:nautilus</code>
 
| 48
 
| None
 
|-
 
| <code>minecraft:dolphin</code>
 
| 49
 
| None
 
|}
 
 
 
=== [[Chat]] ===
 
 
 
==== Selector component ====
 
 
 
Displays the results of an entity selector.  '''Should not be sent to clients'''; only intended for commands and client-to-server actions.  If the component contains a <code>selector</code> key, then it is a selector component.
 
 
 
The server resolves the list selector into a list of entities, each with an appropriate hover event, {{change|and joined with commas and "and" (but it lacks a [[wikipedia:serial comma|serial comma]])|joined with commas between each entry, without an "and"}}.
 
 
 
== 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 521: Line 135:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="9"| 0
+
  |rowspan="9"| {{Metadata id|}}
 
  |rowspan="9"| Byte
 
  |rowspan="9"| Byte
 
  ! Bit mask
 
  ! Bit mask
Line 528: Line 142:
 
  |-
 
  |-
 
  | 0x01
 
  | 0x01
  | On Fire
+
  | Is on fire
 
  |-
 
  |-
 
  | 0x02
 
  | 0x02
  | Crouched
+
  | Is crouching
 
  |-
 
  |-
 
  | 0x04
 
  | 0x04
Line 537: Line 151:
 
  |-
 
  |-
 
  | 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
 
  | Boolean
  |colspan="2"| No gravity
+
  |colspan="2"| Has no gravity
 
  | false
 
  | false
|}
 
 
=== AreaEffectCloud ===
 
 
Extends [[#Entity|Entity]].
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
 
  |-
 
  |-
  | 6
+
  | {{Metadata id|}}
| Float
+
  | Pose
|colspan="2"| Radius
+
  |colspan="2"| Pose
| 0.5
+
  | STANDING
|-
+
  |- {{added}}
| 7
+
  | {{Metadata id|added}}
| VarInt
 
|colspan="2"| Color (only for mob spell particle)
 
| 0
 
|-
 
| 8
 
  | Boolean
 
  |colspan="2"| Ignore radius and show effect as single point, not area
 
  | false
 
  |- style="background-color: #d9ead3;"
 
  | 9
 
| Particle
 
| colspan="2"| The [[#Particle]]
 
| <code>effect</code>
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 9
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Particle ID
+
  |colspan="2"| Ticks frozen in powdered snow
| 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
 
  | 0
 
  |}
 
  |}
  
=== Trident ===
+
== Block Actions ==
 
 
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
 
|colspan="2"| Left paddle turning
 
| 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
 
| VarInt
 
|colspan="2"| Size
 
| 0
 
|}
 
 
 
Hitbox size is determined by horizontal=0.9 + 0.2*size and vertical=0.5 + 0.1 * i
 
 
 
=== Dolphin ===
 
 
 
Extends [[#Creature|Creature]].
 
 
 
No additional metadata.
 
 
 
=== WaterMob ===
 
 
 
Extends {{Change|[[#Insentient|Insentient]]|[[#Creature|Creature]]}}.
 
 
 
No additional metadata.
 
 
 
=== Abstract fish ===
 
 
 
Extends [[#WaterMob|WaterMob]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 12
 
| Boolean
 
|colspan="2"| From bucket
 
| 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
 
| VarInt
 
|colspan="2"| PuffState (varies from 0 to 2)
 
| 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
 
| VarInt
 
|colspan="2"| Variant
 
| 0
 
|}
 
 
 
=== Turtle ===
 
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 13
 
| BlockPos
 
|colspan="2"| Home pos
 
| (0, 0, 0)
 
|-
 
| 14
 
| 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 ===
+
No changes so far.
  
Extends [[#Drowned|Drowned]].
+
== Inventories ==
  
{| class="wikitable" style="background-color: #d9ead3;"
+
No changes so far.
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| Boolean
 
|colspan="2"| Has target (?)
 
| false
 
|}
 
 
 
== Block Actions ==
 
 
 
No changes so far.  
 
  
 
== Plugin Channels ==
 
== Plugin Channels ==
  
=== <code>MC|StopSound</code> ===
+
No changes so far.
 
 
{{Change|''Server to client''}}
 
 
 
{{Change|Used to implement {{Minecraft Wiki|Commands#StopSound|the <code>/stopsound</code> command}}. Stops a sound that is currently playing on the client.}}
 
 
 
{| class="wikitable" style="background-color: #f4cccc; text-decoration: line-through;"
 
! Field name
 
! Field type
 
! Notes
 
|-
 
| Sound category
 
| String
 
| 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.
 
|-
 
| Sound name
 
| String
 
| 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
 
|colspan="2"| Position
 
|
 
|-
 
|colspan="2"| Count
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="2"| Data
 
| Unknown 2
 
|rowspan="2"| Array
 
| Position
 
|
 
|-
 
| Unknown 3
 
| Float
 
|
 
|}
 
 
 
=== <code>MC|DebugStructures</code> ===
 
 
 
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
 
| Float
 
|
 
|-
 
| Unknown 3
 
| Float
 
|
 
|-
 
| Unknown 4
 
| Float
 
|
 
|-
 
| Unknown 5
 
| Float
 
|
 
|-
 
| Unknown 6
 
| Float
 
|
 
|}
 
  
 
== Play ==
 
== Play ==
Line 992: Line 217:
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Spawn Painting ====
+
==== Sculk Vibration Signal ====
  
This packet shows location, name, and type of painting.
+
{| class="wikitable" {{Added}}
 
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,004: Line 227:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| 0x04
+
  |rowspan="4"| 0x05
  |rowspan="5"| Play
+
  |rowspan="4"| Play
  |rowspan="5"| Client
+
  |rowspan="4"| Client
  | Entity ID
+
  | Source Position
| VarInt
 
|
 
|-
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Motive
 
| {{Change|String (13)|VarInt}}
 
| {{Change|Name of the painting. Max length 13|Panting's ID, see below}}
 
|-
 
| Location
 
 
  | Position
 
  | Position
  | Center coordinates (see below)
+
  | Source position for the vibration.
 
  |-
 
  |-
  | Direction
+
  | Destination Identifier
  | Byte Enum
+
  | Identifier
  | Direction the painting faces (North = 2, South = 0, West = 1, East = 3)
+
  | Identifier of the destination codec type.
|}
 
 
 
Calculating the center of an image: given a (width × height) grid of cells, with <code>(0, 0)</code> being the top left corner, the center is <code>(max(0, width / 2 - 1), height / 2)</code>. E.g. <code>(1, 0)</code> for a 2×1 painting, or <code>(1, 2)</code> for a 4×4 painting.
 
 
 
List of paintings by coordinates in <code>paintings_kristoffer_zetterstrand.png</code> (where x and y are in pixels from the top left and width and height are in pixels or 16ths of a block):
 
 
 
{| class="wikitable"
 
! Name
 
!style="background-color: #d9ead3;"| ID
 
! x
 
! y
 
! width
 
! height
 
 
  |-
 
  |-
  | {{Change|<code>Kebab</code>|<code>minecraft:kebab</code>}}
+
  | Destination
  | 0
+
  | Varies
  | 0
+
  | 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
 
| 16
 
| 16
 
|-
 
| {{Change|<code>Aztec</code>|<code>minecraft:aztec</code>}}
 
| 1
 
| 16
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Alban</code>|<code>minecraft:alban</code>}}
 
| 2
 
| 32
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Aztec2</code>|<code>minecraft:aztec2</code>}}
 
| 3
 
| 48
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Bomb</code>|<code>minecraft:bomb</code>}}
 
| 4
 
| 64
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Plant</code>|<code>minecraft:plant</code>}}
 
| 5
 
| 80
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Wasteland</code>|<code>minecraft:wasteland</code>}}
 
| 6
 
| 96
 
| 0
 
| 16
 
| 16
 
|-
 
| {{change|<code>Pool</code>|<code>minecraft:pool</code>}}
 
| 7
 
| 0
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Courbet</code>|<code>minecraft:courbet</code>}}
 
| 8
 
| 32
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Sea</code>|<code>minecraft:sea</code>}}
 
| 9
 
| 64
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Sunset</code>|<code>minecraft:sunset</code>}}
 
| 10
 
| 96
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Creebet</code>|<code>minecraft:creebet</code>}}
 
| 11
 
| 128
 
| 32
 
| 32
 
| 16
 
|-
 
| {{change|<code>Wanderer</code>|<code>minecraft:wanderer</code>}}
 
| 12
 
| 0
 
| 64
 
| 16
 
| 32
 
|-
 
| {{change|<code>Graham</code>|<code>minecraft:graham</code>}}
 
| 13
 
| 16
 
| 64
 
| 16
 
| 32
 
|-
 
| {{change|<code>Match</code>|<code>minecraft:match</code>}}
 
| 14
 
| 0
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Bust</code>|<code>minecraft:bust</code>}}
 
| 15
 
| 32
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Stage</code>|<code>minecraft:stage</code>}}
 
| 16
 
| 64
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Void</code>|<code>minecraft:void</code>}}
 
| 17
 
| 96
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>SkullAndRoses</code>|<code>skull_and_roses</code>}}
 
| 18
 
| 128
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Wither</code>|<code>minecraft:wither</code>}}
 
| 19
 
| 160
 
| 128
 
| 32
 
| 32
 
|-
 
| {{change|<code>Fighters</code>|<code>minecraft:fighters</code>}}
 
| 20
 
| 0
 
| 96
 
| 64
 
| 32
 
|-
 
| {{change|<code>Pointer</code>|<code>minecraft:pointer</code>}}
 
| 21
 
| 0
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>Pigscene</code>|<code>minecraft:pigscene</code>}}
 
| 22
 
| 64
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>BurningSkull</code>|<code>minecraft:burning_skull</code>}}
 
| 23
 
| 128
 
| 192
 
| 64
 
| 64
 
|-
 
| {{change|<code>Skeleton</code>|<code>minecraft:skeleton</code>}}
 
| 24
 
| 192
 
| 64
 
| 64
 
| 48
 
|-
 
| {{change|<code>DonkeyKong</code>|<code>minecraft:donkey_kong</code>}}
 
| 25
 
| 192
 
| 112
 
| 64
 
| 48
 
|}
 
 
 
The {{Minecraft Wiki|Painting#Canvases|Minecraft Wiki article on paintings}} also provides a list of painting names to the actual images.
 
 
 
==== Statistics ====
 
 
 
Sent as a response to [[#Client_Status|Client Status]] (id 1).
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| 0x07
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Statistic
 
|style="background-color: #f4cccc; text-decoration: line-through;"| Name
 
|rowspan="4"| Array
 
|style="background-color: #f4cccc; text-decoration: line-through;"| String (32767)
 
|style="background-color: #f4cccc; text-decoration: line-through;"| [https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff]
 
|- style="background-color: #d9ead3;"
 
| Category ID
 
| VarInt
 
| See below
 
|- style="background-color: #d9ead3;"
 
| Statistic ID
 
| VarInt
 
| See below
 
|-
 
| Value
 
| VarInt
 
| The amount to set it to
 
|}
 
 
 
Categories (these are namespaced, but with <code>:</code>. replaced with <code>.</code>):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Registry
 
|-
 
| <code>minecraft.mined</code>
 
| 0
 
| Blocks
 
|-
 
| <code>minecraft.crafted</code>
 
| 1
 
| Items
 
|-
 
| <code>minecraft.used</code>
 
| 2
 
| Items
 
|-
 
| <code>minecraft.broken</code>
 
| 3
 
| Items
 
|-
 
| <code>minecraft.picked_up</code>
 
| 4
 
| Items
 
|-
 
| <code>minecraft.dropped</code>
 
| 5
 
| Items
 
|-
 
| <code>minecraft.killed</code>
 
| 6
 
| Entities
 
|-
 
| <code>minecraft.killed_by</code>
 
| 7
 
| Entities
 
|-
 
| <code>minecraft.custom</code>
 
| 8
 
| Custom
 
|}
 
 
 
Blocks, Items, and Entities use block (not block state), item, and entity ids.
 
 
 
Custom has the following (unit only matters for clients):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Unit
 
|-
 
| <code>minecraft.leave_game</code>
 
| 0
 
| None
 
|-
 
| <code>minecraft.play_one_minute</code>
 
| 1
 
| Time
 
|-
 
| <code>minecraft.time_since_death</code>
 
| 2
 
| Time
 
|-
 
| <code>minecraft.sneak_Time</code>
 
| 3
 
| Time
 
|-
 
| <code>minecraft.walk_one_cm</code>
 
| 4
 
| Distance
 
|-
 
| <code>minecraft.crouch_one_cm</code>
 
| 5
 
| Distance
 
|-
 
| <code>minecraft.sprint_one_cm</code>
 
| 6
 
| Distance
 
|-
 
| <code>minecraft.swim_one_cm</code>
 
| 7
 
| Distance
 
|-
 
| <code>minecraft.fall_one_cm</code>
 
| 8
 
| Distance
 
|-
 
| <code>minecraft.climb_one_cm</code>
 
| 9
 
| Distance
 
|-
 
| <code>minecraft.fly_one_cm</code>
 
| 10
 
| Distance
 
|-
 
| <code>minecraft.dive_one_cm</code>
 
| 11
 
| Distance
 
|-
 
| <code>minecraft.minecart_one_cm</code>
 
| 12
 
| Distance
 
|-
 
| <code>minecraft.boat_one_cm</code>
 
| 13
 
| Distance
 
|-
 
| <code>minecraft.pig_one_cm</code>
 
| 14
 
| Distance
 
|-
 
| <code>minecraft.horse_one_cm</code>
 
| 15
 
| Distance
 
|-
 
| <code>minecraft.aviate_one_cm</code>
 
| 16
 
| Distance
 
|-
 
| <code>minecraft.jump</code>
 
| 17
 
| None
 
|-
 
| <code>minecraft.drop</code>
 
| 18
 
| None
 
|-
 
| <code>minecraft.damage_dealt</code>
 
| 19
 
| Damage
 
|-
 
| <code>minecraft.damage_taken</code>
 
| 20
 
| Damage
 
|-
 
| <code>minecraft.deaths</code>
 
| 21
 
| None
 
|-
 
| <code>minecraft.mob_kills</code>
 
| 22
 
| None
 
|-
 
| <code>minecraft.animals_bred</code>
 
| 23
 
| None
 
 
  |-
 
  |-
  | <code>minecraft.player_kills</code>
+
  | Arrival Ticks
| 24
 
| None
 
|-
 
| <code>minecraft.fish_caught</code>
 
| 25
 
| None
 
|-
 
| <code>minecraft.talked_to_villager</code>
 
| 26
 
| None
 
|-
 
| <code>minecraft.traded_with_villager</code>
 
| 27
 
| None
 
|-
 
| <code>minecraft.eat_cake_slice</code>
 
| 28
 
| None
 
|-
 
| <code>minecraft.fill_cauldron</code>
 
| 29
 
| None
 
|-
 
| <code>minecraft.use_cauldron</code>
 
| 30
 
| None
 
|-
 
| <code>minecraft.clean_armor</code>
 
| 31
 
| None
 
|-
 
| <code>minecraft.clean_banner</code>
 
| 32
 
| None
 
|-
 
| <code>minecraft.interact_with_brewingstand</code>
 
| 33
 
| None
 
|-
 
| <code>minecraft.interact_with_beacon</code>
 
| 34
 
| None
 
|-
 
| <code>minecraft.inspect_dropper</code>
 
| 35
 
| None
 
|-
 
| <code>minecraft.inspect_hopper</code>
 
| 36
 
| None
 
|-
 
| <code>minecraft.inspect_dispenser</code>
 
| 37
 
| None
 
|-
 
| <code>minecraft.play_noteblock</code>
 
| 38
 
| None
 
|-
 
| <code>minecraft.tune_noteblock</code>
 
| 39
 
| None
 
|-
 
| <code>minecraft.pot_flower</code>
 
| 40
 
| None
 
|-
 
| <code>minecraft.trigger_trapped_chest</code>
 
| 41
 
| None
 
|-
 
| <code>minecraft.open_enderchest</code>
 
| 42
 
| None
 
|-
 
| <code>minecraft.enchant_item</code>
 
| 43
 
| None
 
|-
 
| <code>minecraft.play_record</code>
 
| 44
 
| None
 
|-
 
| <code>minecraft.interact_with_furnace</code>
 
| 45
 
| None
 
|-
 
| <code>minecraft.interact_with_crafting_table</code>
 
| 46
 
| None
 
|-
 
| <code>minecraft.open_chest</code>
 
| 47
 
| None
 
|-
 
| <code>minecraft.sleep_in_bed</code>
 
| 48
 
| None
 
|-
 
| <code>minecraft.open_shulker_box</code>
 
| 49
 
| None
 
|}
 
 
 
Units:
 
 
 
* None: just a normal number (formatted with 0 decimal places)
 
* Damage: value is 10 times the normal amount
 
* Distance: a distance in centimeters (hundredths of blocks)
 
* Time: a time span in ticks
 
 
 
==== Update Block Entity ====
 
 
 
Sets tile entity associated with the block at the given location.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x09
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Location
 
| Position
 
|
 
|-
 
| Action
 
| Unsigned Byte
 
| The type of update to perform, see below
 
|-
 
| NBT Data
 
| [[NBT|NBT Tag]]
 
| Data to set.  May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)
 
|}
 
 
 
''Action'' field:
 
 
 
* '''1''': Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
 
* '''2''': Set command block text (command and last execution status)
 
* '''3''': Set the level, primary, and secondary powers of a beacon
 
* '''4''': Set rotation and skin of mob head
 
* {{Change|'''5''': Set type of flower in flower pot}}
 
* {{Change||'''5''': Declare a conduit}}
 
* '''6''': Set base color and patterns on a banner
 
* '''7''': Set the data for a Structure tile entity
 
* '''8''': Set the destination for a end gateway
 
* '''9''': Set the text on a sign
 
* '''10''': Declare a shulker box, no data appears to be sent and the client seems to do fine without this packet. Perhaps it is a leftover from earlier versions?
 
* '''11''': {{change|Set the color of a bed|Declare a bed}}
 
 
 
==== Block Change ====
 
 
 
Fired whenever a block is changed within the render distance.
 
 
 
{{Warning2|Changing a block in a chunk that is not loaded is not a stable action.  The Notchian client currently uses a ''shared'' empty chunk which is modified for all block changes in unloaded chunks; while in 1.9 this chunk never renders in older versions the changed block will appear in all copies of the empty chunk.  Servers should avoid sending block changes in unloaded chunks and clients should ignore such packets.}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x0B
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Location
 
| Position
 
| Block Coordinates
 
|-
 
| Block ID
 
 
  | 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.}}
+
  | Ticks for the signal to arrive at the destination.
|}
 
 
 
==== Multi Block Change ====
 
 
 
Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
 
 
 
{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Change|Block Change]]).}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x10|0x0F}}
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Chunk X
 
|colspan="2"| Int
 
| Chunk X coordinate
 
|-
 
|colspan="2"| Chunk Z
 
|colspan="2"| Int
 
| Chunk Z coordinate
 
|-
 
|colspan="2"| Record Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array, i.e. the number of blocks affected
 
|-
 
|rowspan="3"| Record
 
| Horizontal Position
 
|rowspan="3"| Array
 
| Unsigned Byte
 
| The 4 most significant bits (<code>0xF0</code>) encode the X coordinate, relative to the chunk. The 4 least significant bits (<code>0x0F</code>) encode the Z coordinate, relative to the chunk.
 
|-
 
| Y Coordinate
 
| Unsigned Byte
 
| Y coordinate of the block
 
|-
 
| Block ID
 
| VarInt
 
| The new block state ID for the block as given in the [[#global palette|global palette]].  {{change|(When reading data: <code>type {{=}} id >> 4</code>, <code>meta {{=}} id & 15</code>, when writing data: <code>id {{=}} type << 4 {{!}} (meta & 15)</code>)|See that section for more information.}}
 
|}
 
 
 
To decode the position into a world position:
 
 
 
<syntaxhighlight lang="java">
 
worldX = (horizPos >> 4 & 15) + (chunkX * 16);
 
worldY = vertPos;
 
worldZ = (horizPos & 15) + (chunkZ * 16);
 
</syntaxhighlight>
 
 
 
 
 
==== Tab-Complete (clientbound) ====
 
 
 
Used to respond to the client's previous tab complete request.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"|  Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x0E|0x10}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
|colspan="2" style="background-color: #d9ead3;"| Transaction Id
 
|colspan="2" style="background-color: #d9ead3;"| VarInt
 
|style="background-color: #d9ead3;"| This id should also be used in the tab completion response packet, or it will be ignored.
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Start
 
|colspan="2"|  VarInt
 
| Start of the text to replace
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Length
 
|colspan="2"|  VarInt
 
| Length of the text to replace
 
|-
 
|colspan="2"|  Count
 
|colspan="2"|  VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="3"| Matches
 
| Match
 
|rowspan="3"| Array
 
| String (32767)
 
| One eligible {{change|command|value to insert}}, note that each command is sent separately instead of in a single string, hence the need for Count.  {{change||Note that for instance this doesn't include a leading <code>/</code> on commands.}}
 
|-
 
|style="background-color: #d9ead3;"| Has tooltip
 
|style="background-color: #d9ead3;"| Boolean
 
|style="background-color: #d9ead3;"| True if the following is present
 
|-
 
|style="background-color: #d9ead3;"| Tooltip
 
|style="background-color: #d9ead3;"| Optional [[Chat]]
 
|style="background-color: #d9ead3;"| Tooltip to display; only present if previous Boolean is true
 
|}
 
 
 
==== Declare Commands ====
 
 
 
Lists all of the commands on the server, and how they are parsed.
 
 
 
This is a directed graph, with one root node.  Each redirect or child node must refer only to nodes that have already been declared.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x11
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Nodes
 
| Array of [[Command Data|Node]]
 
| An array of nodes
 
|-
 
| Root index
 
| VarInt
 
| Index of the <code>root</code> node in the previous array
 
|}
 
 
 
For more information on this packet, see the [[Command Data]] article.
 
 
 
==== Named Sound Effect ====
 
{{See also|#Sound Effect}}
 
 
 
Used to play a sound effect on the client. Custom sounds may be added by resource packs.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x19|0x1A}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| Sound Name
 
| {{Change|String (256)|Identifier}}
 
| All sound effect names as of 1.12.2 can be seen [http://pokechu22.github.io/Burger/1.12.2.html#sounds here].
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Effect Position X
 
| Int
 
| Effect X multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Y
 
| Int
 
| Effect Y multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Z
 
| Int
 
| Effect Z multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Volume
 
| Float
 
| 1 is 100%, can be more
 
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
 
  |}
 
  |}
 +
This packet shows a permanent particle.
  
 
==== Chunk Data ====
 
==== Chunk Data ====
Line 1,773: Line 252:
 
{{See also|#Unload Chunk}}
 
{{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 sentThis 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).
+
{{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)}}
  
{{Change||Indexes into the global palette are still used, but since the global palette has changed, behavior is different.}}
+
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).
{{Change||The Palette length field is no longer sent when using the global palette}}
 
 
 
The bits per block value used to index in the global palette is {{change|13|14}}, which is determined by taking the base 2 logarithm of the highest state ID and then rounding up (or alternatively, simply checking how many bits are needed to represent the highest state ID).
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,788: Line 264:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x20|0x21}}
+
  |rowspan="13"| {{change|0x20|0x21}}
  |rowspan="9"| Play
+
  |rowspan="13"| Play
  |rowspan="9"| Client
+
  |rowspan="13"| Client
 
  | Chunk X
 
  | Chunk X
 
  | Int
 
  | Int
Line 1,798: Line 274:
 
  | Int
 
  | Int
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
  |-
+
  |- {{removed}}
  | Ground-Up Continuous
+
  | Full chunk
 
  | Boolean
 
  | Boolean
  | See [[Chunk Format#Ground-up continuous|Chunk Format]]
+
  | See [[Chunk Format#Full chunk|Chunk Format]]
  |-
+
  |- {{removed}}
 
  | Primary Bit Mask
 
  | Primary Bit Mask
 
  | VarInt
 
  | VarInt
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 +
|- {{added}}
 +
| Bit Mask Length
 +
| VarInt
 +
| 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.|}}
 +
|-
 +
| 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
 
  | Size
Line 1,824: Line 320:
 
  |}
 
  |}
  
{{Warning2|The chunk data packet currently (for 1.13 snapshots) may allocate a data array slightly larger than necessary; see [https://bugs.mojang.com/browse/MC-131684 MC-131684].  As such, there may be extra data (all zeros) after the end of the buffer that is not used.}}
+
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.
 
 
===== Data structure =====
 
 
 
The data section of the packet contains most of the useful data for the chunk.
 
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| Data
 
| Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
 
| The number of elements is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
 
|-
 
| Biomes
 
| Optional {{Change|Byte|Int}} Array
 
| Only sent if Ground-Up Continuous is true; 256 {{change|bytes|entries}} if present
 
|}
 
 
 
===== Direct palette =====
 
  
This format is used for bits per block values greater than 9.  The number of bits used to represent a block are the base 2 logarithm of the number of block states, rounded up. For the current vanilla release, this is 13 bits per block.
+
The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.
  
:The "palette" uses the following format:
+
New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
:{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Dummy Palette Length
 
| VarInt
 
| Should always be 0.  Only exists to mirror the format used elsewhere.
 
|-
 
|colspan="3"| ''no fields''
 
|}
 
  
If Minecraft Forge is installed and a sufficiently large number of blocks are added, the bits per block value for the global palette will be increased to compensate for the increased ID count.  This increase can go up to 16 bits per block (for a total of 4096 block IDs; when combined with the 16 damage values, there are 65536 total states).  You can get the number of blocks with the "Number of ids" field found in the [[Minecraft Forge Handshake#RegistryData|RegistryData packet in the Forge Handshake]].
+
<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>
  
==== Spawn Particle ====
+
==== Update Light ====
  
Displays the named particle
+
Updates light levels for a chunk.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,873: Line 337:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="11"| {{Change|0x22|0x23}}
+
  |rowspan="21"| {{change|0x23|0x24}}
  |rowspan="11"| Play
+
  |rowspan="21"| Play
  |rowspan="11"| Client
+
  |rowspan="21"| Client
  | Particle ID
+
  |colspan="2"| Chunk X
  | Int
+
  |colspan="2"| VarInt
  | The particle ID listed in [[#Particle]].
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | Long Distance
+
  |colspan="2"| Chunk Z
  | Boolean
+
  |colspan="2"| VarInt
  | If true, particle distance increases from 256 to 65536
+
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | X
+
  |colspan="2"| Trust Edges
  | Float
+
|colspan="2"| Boolean
  | X position of the particle
+
| 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
 +
| 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
 
  |-
 
  |-
  | Y
+
  |rowspan="2"| Sky Light arrays
  | Float
+
| Length
  | Y position of the particle
+
|rowspan="2"| Array
 +
  | VarInt
 +
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | Z
+
  | Sky Light array
  | Float
+
  | Array of 2048 bytes
  | Z position of the particle
+
| 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
 
  |-
 
  |-
  | Offset X
+
  |rowspan="2"| Block Light arrays
| Float
+
  | Length
  | This is added to the X position after being multiplied by random.nextGaussian()
+
  |rowspan="2"| Array
  |-
+
  | VarInt
| Offset Y
+
  | Length of the following array in bytes (always 2048)
  | Float
 
  | This is added to the Y position after being multiplied by random.nextGaussian()
 
|-
 
| Offset Z
 
| Float
 
| This is added to the Z position after being multiplied by random.nextGaussian()
 
|-
 
| Particle Data
 
| Float
 
| The data of each particle
 
|-
 
| Particle Count
 
| Int
 
| The number of particles to create
 
 
  |-
 
  |-
  | Data
+
  | Block Light array
  | {{Change|Array of VarInt|Varies}}
+
  | Array of 2048 bytes
  | {{Change|Length depends on particle. "iconcrack" has length of 2, "blockcrack", "blockdust", and "fallingdust" have lengths of 1, the rest have 0.|The variable data listed in [[#Particle]]}}
+
  | There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
 
  |}
 
  |}
  
==== Map ====
+
 
 +
==== Map Data ====
  
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
Line 1,937: Line 446:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="16"| {{Change|0x24|0x25}}
+
  |rowspan="18"| {{change|0x25|0x26}}
  |rowspan="16"| Play
+
  |rowspan="18"| Play
  |rowspan="16"| 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="6"| Icon
 
  |rowspan="6"| Icon
  | {{Change|Direction And Type|Type}}
+
  | Type
 
  |rowspan="6"| Array
 
  |rowspan="6"| Array
  | {{Change|Byte|VarInt enum}}
+
  | VarInt enum
  | {{Change|0xF0 {{=}} Type, 0x0F {{=}} Direction|Type (see below)}}
+
  | 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
 
  | Direction
 
  | Byte
 
  | Byte
 
  | 0-15
 
  | 0-15
  |- style="background-color: #d9ead3;"
+
  |-
 
  | Has Display Name
 
  | Has Display Name
 
  | Boolean
 
  | Boolean
 
  |
 
  |
  |- style="background-color: #d9ead3;"
+
  |-
 
  | Display Name
 
  | Display Name
 
  | Optional [[Chat]]
 
  | Optional [[Chat]]
Line 1,983: Line 501:
 
  |-  
 
  |-  
 
  |colspan="2"| Columns
 
  |colspan="2"| Columns
  |colspan="2"| Byte
+
  |colspan="2"| Unsigned Byte
 
  | Number of columns updated
 
  | Number of columns updated
 
  |-
 
  |-
Line 2,045: Line 563:
 
  | 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 ====
+
==== 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.
  
Response to the serverbound packet ([[#Craft Recipe Request|Craft Recipe Request]]), with the same recipe ID.  Appears to be used to notify the UI.
+
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?)”.
  
{| class="wikitable"
+
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”.
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| {{Change|0x2B|0x2C}}
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Window ID
 
| Byte
 
|
 
|-
 
| Recipe
 
| {{Change|VarInt|Identifer}}
 
| A recipe ID
 
|}
 
  
==== Face Player ====
+
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 2,134: Line 636:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| 0x30
+
  |rowspan="8"| {{change|0x34|0x35}}
 
  |rowspan="8"| Play
 
  |rowspan="8"| Play
 
  |rowspan="8"| Client
 
  |rowspan="8"| Client
  |-
+
  | X
| Feet/eyes
 
| VarInt enum
 
| Values are feet=0, eyes=1.  If set to eyes, aims using the head position; otherwise aims using the feet position.
 
|-
 
| Target x
 
 
  | Double
 
  | Double
  | x coordinate of the point to face towards
+
  | Absolute or relative position, depending on Flags.
 
  |-
 
  |-
  | Target y
+
  | Y
 
  | Double
 
  | Double
  | y coordinate of the point to face towards
+
  | Absolute or relative position, depending on Flags.
 
  |-
 
  |-
  | Target z
+
  | Z
 
  | Double
 
  | Double
  | z coordinate of the point to face towards
+
  | Absolute or relative position, depending on Flags.
 
  |-
 
  |-
  | Is entity
+
  | Yaw
  | Boolean
+
  | Float
  | If true, additional information about an entity is provided.
+
  | Absolute or relative rotation on the X axis, in degrees.
 
  |-
 
  |-
  | Entity ID
+
  | Pitch
  | Optional VarInt
+
  | Float
  | Only if is entity is true &mdash; the entity to face towards
+
  | Absolute or relative rotation on the Y axis, in degrees.
 
  |-
 
  |-
  | Entity feet/eyes
+
  | Flags
  | Optional VarInt enum
+
  | Byte
  | Whether to look at the entity's eyes or feet.  Same values and meanings as before, just for the entity's head/feet.
+
  | Bit field, see below.
|}
 
 
 
If the entity given by entity ID cannot be found, this packet should be treated as if is entity was false.
 
 
 
==== Unlock Recipes ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="10"| {{Change|0x31|0x33}}
 
|rowspan="10"| Play
 
|rowspan="10"| Client
 
 
  |-
 
  |-
  | Action
+
  | Teleport ID
 
  | VarInt
 
  | VarInt
  | 0: init, 1: add, 2: remove
+
  | Client should confirm this packet with [[#Teleport Confirm|Teleport Confirm]] containing the same Teleport ID.
  |-
+
  |- {{added}}
  | Crafting Recipe Book Open
+
  | Dismount Vehicle
 
  | Boolean
 
  | Boolean
  | If true, then the crafting recipe book will be open when the player opens its inventory.
+
  | True if the player should dismount their vehicle.
|-
 
| Crafting Recipe Book Filter Active
 
| Boolean
 
| If true, then the filtering option is active when the players opens its inventory.
 
|-
 
|style="background-color: #d9ead3;"| Smelting Recipe Book Open
 
| Boolean
 
| If true, then the smelting recipe book will be open when the player opens its inventory.
 
|-
 
|style="background-color: #d9ead3;"| Smelting Recipe Book Filter Active
 
| Boolean
 
| If true, then the filtering option is active when the players opens its inventory.
 
|-
 
| Array size 1
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Recipe IDs
 
| Array of {{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 ====
+
About the Flags field:
  
This is sent to the client when it should create a new {{Minecraft Wiki|scoreboard}} objective or remove one.
+
<Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
 
 
{{Warning|Since snapshot 17w49a (1.13), [https://bugs.mojang.com/browse/MC-131382 mode 2 is broken]}}
 
  
 
{| class="wikitable"
 
{| class="wikitable"
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x42|0x44}}
+
  ! Field
  |rowspan="4"| Play
+
  ! Bit
|rowspan="4"| Client
 
| Objective Name
 
| String (16)
 
| An unique name for the objective
 
 
  |-
 
  |-
  | Mode
+
  | X
  | Byte
+
  | 0x01
| 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text.
 
 
  |-
 
  |-
  | Objective Value
+
  | Y
  | Optional String (32)
+
  | 0x02
| Only if mode is 0 or 2. The text to be displayed for the score
 
 
  |-
 
  |-
  | Type
+
  | Z
  | Optional {{change|String|VarInt Enum}}
+
  | 0x04
| Only if mode is 0 or 2. {{change|“integer” or “hearts”|0 = "integer", 1 = "hearts"}}
 
|}
 
 
 
==== Teams ====
 
 
 
Creates and updates teams.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="27"| {{Change|0x44|0x46}}
+
  | Y_ROT
|rowspan="27"| Play
+
  | 0x08
|rowspan="27"| Client
 
|colspan="2"| Team Name
 
| String (16)
 
  | A unique name for the team. (Shared with scoreboard).
 
 
  |-
 
  |-
  |colspan="2"| Mode
+
  | X_ROT
| Byte
+
  | 0x10
| Determines the layout of the remaining packet
 
|-
 
|rowspan="11"| 0: create team
 
| Team Display Name
 
| String (32)
 
|
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Team Prefix
 
| String (16)
 
| Displayed before the names of players that are part of this team
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Team Suffix
 
| String (16)
 
| Displayed after the names of players that are part of this team
 
|-
 
| Friendly Flags
 
| 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.}}
 
|- style="background-color: #d9ead3;"
 
| Team Prefix
 
| Chat
 
| Displayed before the names of players that are part of this team
 
|- style="background-color: #d9ead3;"
 
| Team Suffix
 
| Chat
 
| Displayed after the names of players that are part of this team
 
|-
 
| 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''
 
|
 
|-
 
|rowspan="9"| 2: update team info
 
| Team Display Name
 
| String (32)
 
|
 
|- 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
 
| Byte
 
| Bit mask. 0x01: Allow friendly fire, 0x02: can see invisible entities 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.}}
 
|- style="background-color: #d9ead3;"
 
| Team Prefix
 
| Chat
 
| Displayed before the names of players that are part of this team
 
|- style="background-color: #d9ead3;"
 
| Team Suffix
 
| Chat
 
| Displayed after the names of players that are part of this team
 
|-
 
|rowspan="2"| 3: add players to team
 
| Entity Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Entities
 
| Array of String (40)
 
| Identifiers for the entities added.  For players, this is their username; for other entities, it is their UUID.
 
|-
 
|rowspan="2"| 4: remove players from team
 
| Entity Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| 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.
+
==== Resource Pack Send ====  
 
 
{| class="wikitable"
 
! ID
 
! Formatting
 
|-
 
| 0-15
 
| Color formatting, same values as [[Chat]] colors.
 
|-
 
| 16
 
| Obfuscated
 
|-
 
| 17
 
| Bold
 
|-
 
| 18
 
| Strikethrough
 
|-
 
| 19
 
| Underlined
 
|-
 
| 20
 
| Italic
 
|-
 
| 21
 
| Reset
 
|}
 
 
 
==== Stop Sound ====
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,425: Line 707:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x4B
+
  |rowspan="3"| {{change|0x38|0x39}}
  |rowspan="7"| Play
+
  |rowspan="3"| Play
  |rowspan="7"| Client
+
  |rowspan="3"| Client
  | Flags
+
  | URL
  | Byte
+
  | String (32767)
  | Controls which fields are present.
+
  | The URL to the resource pack.
 
  |-
 
  |-
  | Source
+
  | Hash
  | Optional VarInt enum
+
  | String (40)
  | Only if flags is 3 or 1 (bit mask 0x1).  See below.  If not present, then sounds from all sources are cleared.
+
  | 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}}
  | Sound
+
  | Forced
  | Optional Identifier
+
  | Boolean
  | 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.
+
  | The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.
 
  |}
 
  |}
  
Categories:
+
==== Tags ====
 
 
{| class="wikitable"
 
! Name !! Value
 
|-
 
| master || 0
 
|-
 
| music || 1
 
|-
 
| record || 2
 
|-
 
| weather || 3
 
|-
 
| block || 4
 
|-
 
| hostile || 5
 
|-
 
| neutral || 6
 
|-
 
| player || 7
 
|-
 
| ambient || 8
 
|-
 
| voice || 9
 
|}
 
 
 
==== Declare Recipes ====
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,477: Line 733:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x53
+
  |rowspan="8"| {{change|0x5B|0x5C}}
  |rowspan="4"| Play
+
  |rowspan="8"| Play
  |rowspan="4"| Client
+
  |rowspan="8"| Client
|colspan="2"| Num Recipes
+
  |- {{removed}}
|colspan="2"| VarInt
+
  | colspan="2"| Block Tags
| Number of elements in the following array
+
  | colspan="2"| (See below)
  |-
 
|rowspan="3"| Recipe
 
| Recipe ID
 
|rowspan="3"| Array
 
| Identifier
 
|
 
|-
 
| Type
 
| String
 
| The recipe type, see below
 
|-
 
| Data
 
| Optional, varies
 
| Additional data for the recipe.  For some types, there will be no data.
 
|}
 
 
 
Recipe types:
 
 
 
{| class="wikitable"
 
! Type
 
! Description
 
! Data
 
|-
 
| <code>crafting_shapeless</code>
 
| Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredient count
 
    | VarInt
 
    | Number of elements in the following array
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>crafting_shaped</code>
 
| Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Width
 
    | VarInt
 
    |
 
    |-
 
    | Height
 
    | VarInt
 
    |
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    | Length is width * height.  Indexed by x + (y * width).
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
  |-
 
| <code>crafting_special_armordye</code>
 
| Recipe for dying leather armor
 
| None
 
|-
 
| <code>crafting_special_bookcloning</code>
 
| Recipe for copying contents of written books
 
| None
 
|-
 
| <code>crafting_special_mapcloning</code>
 
| Recipe for copying maps
 
| None
 
|-
 
| <code>crafting_special_mapextending</code>
 
| Recipe for adding paper to maps
 
| None
 
|-
 
| <code>crafting_special_firework_rocket</code>
 
| Recipe for making firework rockets
 
| None
 
|-
 
| <code>crafting_special_firework_star</code>
 
| Recipe for making firework stars
 
| None
 
|-
 
| <code>crafting_special_firework_star_fade</code>
 
| Recipe for making firework stars fade between multiple colors
 
| None
 
|-
 
| <code>crafting_special_repairitem</code>
 
| Recipe for repairing items via crafting
 
| None
 
|-
 
| <code>crafting_special_tippedarrow</code>
 
| Recipe for crafting tipped arrows
 
| None
 
|-
 
| <code>crafting_special_bannerduplicate</code>
 
| Recipe for copying banner patterns
 
| None
 
|-
 
| <code>crafting_special_banneraddpattern</code>
 
| Recipe for adding patterns to banners
 
| None
 
|-
 
| <code>crafting_special_shielddecoration</code>
 
| Recipe for applying a banner's pattern to a shield
 
| None
 
|-
 
| <code>crafting_special_shulkerboxcoloring</code>
 
| Recipe for recoloring a shulker box
 
| None
 
|-
 
| <code>smelting</code>
 
| Smelting recipe
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |-
 
    | Experience
 
    | Float
 
    |
 
    |-
 
    | Cooking time
 
    | VarInt
 
    |
 
    |}
 
|}
 
 
 
Ingredient is defined as:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Description
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Items
 
| Array of [[Slot]]
 
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
|}
 
 
 
==== Tags ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
  |-
 
|rowspan="3"| 0x54
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Block Tags
 
| (See below)
 
 
  | IDs are block IDs
 
  | IDs are block IDs
  |-
+
  |- {{removed}}
  | Item Tags
+
  | colspan="2"| Item Tags
  | (See below)
+
  | colspan="2"| (See below)
 
  | IDs are item IDs
 
  | 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>)
 
  |-
 
  |-
  | Fluid Tags
+
  | Array of Tag
 
  | (See below)
 
  | (See below)
  | IDs are fluid IDs
+
  |
 
  |}
 
  |}
  
Line 2,707: Line 791:
 
  | 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 2,724: Line 809:
 
  ! 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>.
 
  |-
 
  |-
  | Text
+
  | View Distance
| String ({{change|32767|256}})
 
| All text behind the cursor without the <code>/</code> (e.g. to the left of the cursor in left-to-right languages like English)
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Assume Command
 
| 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.
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Has Position
 
| Boolean
 
|
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Looked At Block
 
| Optional Position
 
| The position of the block being looked at. Only sent if Has Position is true.
 
|}
 
 
 
==== Craft Recipe Request ====
 
 
 
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.
 
 
 
This packet is sent when a player clicks a recipe in the crafting book that is craftable (white border).
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x12
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Window ID
 
 
  | Byte
 
  | Byte
  |
+
  | Client-side render distance, in chunks.
 
  |-
 
  |-
  | Recipe
+
  | Chat Mode
  | {{Change|VarInt|Identifier}}
+
  | VarInt Enum
  | A recipe ID
+
| 0: enabled, 1: commands only, 2: hidden. See [[Chat#Processing chat|processing chat]] for more information.
 
  |-
 
  |-
  | Make all
+
  | Chat Colors
 
  | Boolean
 
  | Boolean
  | Affects the amount of items processed; true if shift is down when clicked
+
  | “Colors” multiplayer setting.
|}
 
 
 
==== Recipe Book Data ====
 
(previously known as Crafting Book Data)
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="7"| 0x17
+
  | Displayed Skin Parts
|rowspan="7"| Play
+
  | Unsigned Byte
|rowspan="7"| Server
+
  | Bit mask, see below.
|colspan="2"| Type
 
  | VarInt
 
  | Determines the format of the rest of the packet
 
 
  |-
 
  |-
  ! Type
+
  | Main Hand
! Field Name
+
  | VarInt Enum
!
+
  | 0: Left, 1: Right.
!
+
  |- {{Added}}
  |-
+
  | Disable text filtering
  | 0: Displayed Recipe
 
| Recipe ID
 
  | {{Change|Int|Identifer}}
 
  | A recipe ID
 
|-
 
|rowspan="4"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
 
  | Boolean
 
  | Boolean
  | Whether the player has the crafting recipe book currently openened/active.
+
  | Disables filtering of text on signs and written book titlesCurrently always true (i.e. the filtering is disabled)
|-
 
| Crafting Recipe Filter Active
 
  | Boolean
 
| Whether the player has the crafting recipe book filter option currently active.
 
|- style="background-color: #d9ead3;"
 
| Smelting Recipe Book Open
 
| Boolean
 
| Whether the player has the smelting recipe book currently openened/active.
 
|- style="background-color: #d9ead3;"
 
| Smelting Recipe Filter Active
 
| Boolean
 
| Whether the player has the smelting recipe book filter option currently active.
 
 
  |}
 
  |}
  
The Recipe Book Status type is send when one of the states changes.
+
''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.
  
 
== Handshaking ==
 
== Handshaking ==
Line 2,851: Line 878:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|340|384}})
+
  | 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 complete redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide mc.example.org as server address in addition to connecting to it.
 
  |-  
 
  |-  
 
  | Server Port
 
  | Server Port

Latest revision as of 00:28, 2 April 2021

This page documents the changes from the last stable Minecraft release (currently 1.16.5, protocol 754) to the current pre-release (currently 21w07a, protocol Snapshot 15). 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)
0x0F 0x10 Tab-Complete (clientbound) Current (unchanged)
0x10 0x11 Declare Commands Current (unchanged)
0x11 0x12 Window Confirmation (clientbound) Current (unchanged)
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 (unchanged)
0x1C 0x1D Unload Chunk Current (unchanged)
0x1D 0x1E Change Game State Current (unchanged)
0x1E 0x1F Open Horse Window Current (unchanged)
0x1F 0x20 Keep Alive (clientbound) Current (unchanged)
0x20 0x21 Chunk Data Current Pre
0x21 0x22 Effect Current (unchanged)
0x22 0x23 Particle Current (unchanged)
0x23 0x24 Update Light Current Pre
0x24 0x25 Join Game Current (unchanged)
0x25 0x26 Map Data Current Pre
0x26 0x27 Trade List Current (unchanged)
0x27 0x28 Entity Position Current (unchanged)
0x28 0x29 Entity Position and Rotation Current (unchanged)
0x29 0x2A Entity Rotation Current (unchanged)
0x2A 0x2B Entity Movement Current (unchanged)
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)
0x2F 0x30 Craft Recipe Response Current (unchanged)
0x30 0x31 Player Abilities (clientbound) Current (unchanged)
0x31 0x32 Combat Event Current (unchanged)
0x32 0x33 Player Info Current (unchanged)
0x33 0x34 Face Player Current (unchanged)
0x34 0x35 Player Position And Look (clientbound) Current Pre
0x35 0x36 Unlock Recipes Current (unchanged)
0x36 0x37 Destroy Entities Current (unchanged)
0x37 0x38 Remove Entity Effect Current (unchanged)
0x38 0x39 Resource Pack Send Current Pre
0x39 0x3A Respawn Current (unchanged)
0x3A 0x3B Entity Head Look Current (unchanged)
0x3B 0x3C Multi Block Change Current (unchanged)
0x3C 0x3D Select Advancement Tab Current (unchanged)
0x3D 0x3E World Border Current (unchanged)
0x3E 0x3F Camera Current (unchanged)
0x3F 0x40 Held Item Change (clientbound) Current (unchanged)
0x40 0x41 Update View Position Current (unchanged)
0x41 0x42 Update View Distance Current (unchanged)
0x42 0x43 Spawn Position Current (unchanged)
0x43 0x44 Display Scoreboard Current (unchanged)
0x44 0x45 Entity Metadata Current (unchanged)
0x45 0x46 Attach Entity Current (unchanged)
0x46 0x47 Entity Velocity Current (unchanged)
0x47 0x48 Entity Equipment Current (unchanged)
0x48 0x49 Set Experience Current (unchanged)
0x49 0x4A Update Health Current (unchanged)
0x4A 0x4B Scoreboard Objective Current (unchanged)
0x4B 0x4C Set Passengers Current (unchanged)
0x4C 0x4D Teams Current (unchanged)
0x4D 0x4E Update Score Current (unchanged)
0x4E 0x4F Time Update Current (unchanged)
0x4F 0x50 Title Current (unchanged)
0x50 0x51 Entity Sound Effect Current (unchanged)
0x51 0x52 Sound Effect Current (unchanged)
0x52 0x53 Stop Sound Current (unchanged)
0x53 0x54 Player List Header And Footer Current (unchanged)
0x54 0x55 NBT Query Response Current (unchanged)
0x55 0x56 Collect Item Current (unchanged)
0x56 0x57 Entity Teleport Current (unchanged)
0x57 0x58 Advancements Current (unchanged)
0x58 0x59 Entity Properties Current (unchanged)
0x59 0x5A Entity Effect Current (unchanged)
0x5A 0x5B Declare Recipes Current (unchanged)
0x5B 0x5C Tags Current Pre
Play serverbound
0x05 Client Settings Current 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.

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 0x21 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

Update Light

Updates light levels for a chunk.

Packet ID State Bound To Field Name Field Type Notes
0x23 0x24 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.


Map Data

Updates a rectangular area on a map item.

Packet ID State Bound To Field Name Field Type Notes
0x25 0x26 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

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 0x35 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

Resource Pack Send

Packet ID State Bound To Field Name Field Type Notes
0x38 0x39 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.

Tags

Packet ID State Bound To Field Name Field Type Notes
0x5B 0x5C 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.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.