Difference between revisions of "Pre-release protocol"

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(1.15-pre6, no changes)
 
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.12.2, protocol 340]]) to the current pre-release (currently [[Protocol version numbers|18w15a, protocol 371]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.14.4, protocol 498]]) to the current pre-release (currently [[Protocol version numbers|1.15-pre6, protocol 571]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
==== Other definitions ====
+
No changes so far.
 
 
===== Global palette =====
 
A table/dictionary/palette mapping nonnegative integers to block states. {{change|The block state IDs can be constructed from this table by multiplying what the Minecraft Wiki calls “block IDs” by 16 and adding the metadata/damage value (or in most programming languages block_id << 4 {{!}} metadata).|Block state IDs are created in a linear fashion based off of order of assignment.  One block state ID allocated for each unique block state for a block; if a block has multiple properties then the number of allocated states is the product of the number of values for each property.  A current list of properties and state ID ranges is found on [http://pokechu22.github.io/Burger/18w15a.html burger].}}
 
 
 
{{Change||Alternatively, the vanilla server now includes an option to export the current block state ID mapping, by running <code>java -cp minecraft_server.18w15a.jar net.minecraft.data.Main --reports</code> (use <code>--help</code> for a list of other options).  One can parse the generated <code>blocks.json</code> to convert known block states to and from ids.}}
 
  
 
=== Packets ===
 
=== Packets ===
Line 27: Line 22:
 
  |-
 
  |-
 
!colspan="4"| Play clientbound
 
!colspan="4"| Play clientbound
{{PacketList|0x04|Spawn Painting}}
+
{{PacketList|0x03|Spawn Mob}}
{{PacketList|0x07|Statistics}}
+
{{PacketList|0x05|Spawn Player}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x5C|0x08}}|Acknowledge Player Digging|pre=unchanged}}
{{PacketList|0x0B|Block Change}}
+
{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x0A}}|Update Block Entity}}
{{PacketList|{{change|0x10|0x0F}}|Multi Block Change}}
+
{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
{{PacketList|{{change|0x0E|0x10}}|Tab-Complete (clientbound)}}
+
{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
{{PacketList|0x11|Declare Commands|rel=added}}
+
{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
{{PacketList|{{change|0x11|0x12}}|Confirm Transaction (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
{{PacketList|{{change|0x12|0x13}}|Close Window (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x13|0x14}}|Open Window|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x10}}|Multi Block Change|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Declare Commands|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Confirm Transaction (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Close Window (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
Line 43: Line 42:
 
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect}}
+
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
Line 49: Line 48:
 
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
{{PacketList|{{change|0x1F|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x20}}|Open Horse Window|pre=unchanged}}
{{PacketList|{{change|0x20|0x21}}|Chunk Data}}
+
{{PacketList|{{change|0x20|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x21|0x22}}|Effect|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x22}}|Chunk Data}}
{{PacketList|{{change|0x22|0x23}}|Spawn Particle}}
+
{{PacketList|{{change|0x22|0x23}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x23|0x24}}|Join Game|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x24}}|Particle}}
{{PacketList|{{change|0x24|0x25}}|Map}}
+
{{PacketList|{{change|0x24|0x25}}|Update Light|pre=unchanged}}
{{PacketList|{{change|0x25|0x26}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x26}}|Join Game}}
{{PacketList|{{change|0x26|0x27}}|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x26|0x27}}|Map Data|pre=unchanged}}
{{PacketList|{{change|0x27|0x28}}|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x28}}|Trade List|pre=unchanged}}
{{PacketList|{{change|0x28|0x29}}|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x29}}|Entity Relative Move|pre=unchanged}}
{{PacketList|{{change|0x29|0x2A}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x29|0x2A}}|Entity Look And Relative Move|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2B}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x2A|0x2B}}|Entity Look|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Craft Recipe Response}}
+
{{PacketList|{{change|0x2B|0x2C}}|Entity|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2D}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2D}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2E}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2E}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x2E|0x2F}}|Player List Item|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x2F}}|Open Window|pre=unchanged}}
{{PacketList|0x30|Face Player|rel=added}}
+
{{PacketList|{{change|0x2F|0x30}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x30|0x31}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x30|0x32}}|Use Bed|pre=unchanged}}
+
{{PacketList|{{change|0x31|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Unlock Recipes}}
+
{{PacketList|{{change|0x32|0x33}}|Combat Event|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x34}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x33|0x35}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x35}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x34|0x36}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x36}}|Player Position And Look (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Respawn|pre=unchanged}}
+
{{PacketList|{{change|0x36|0x37}}|Unlock Recipes|pre=unchanged}}
{{PacketList|{{change|0x36|0x38}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x38}}|Destroy Entities|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x39}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x38|0x3A}}|World Border|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x3A}}|Resource Pack Send|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x3B}}|Respawn}}
{{PacketList|{{change|0x3A|0x3C}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x3C}}|Entity Head Look|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}}|Display Scoreboard|pre=unchanged}}
{{PacketList|{{change|0x42|0x44}}|Scoreboard Objective}}
+
{{PacketList|{{change|0x43|0x44}}|Entity Metadata|pre=unchanged}}
{{PacketList|{{change|0x43|0x45}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x44|0x45}}|Attach Entity|pre=unchanged}}
{{PacketList|{{change|0x44|0x46}}|Teams}}
+
{{PacketList|{{change|0x45|0x46}}|Entity Velocity|pre=unchanged}}
{{PacketList|{{change|0x45|0x47}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x46|0x47}}|Entity Equipment|pre=unchanged}}
{{PacketList|{{change|0x46|0x48}}|Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x47|0x48}}|Set Experience|pre=unchanged}}
{{PacketList|{{change|0x47|0x49}}|Time Update|pre=unchanged}}
+
{{PacketList|{{change|0x48|0x49}}|Update Health|pre=unchanged}}
{{PacketList|{{change|0x48|0x4A}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x49|0x4A}}|Scoreboard Objective|pre=unchanged}}
{{PacketList|0x4B|Stop Sound|rel=added}}
+
{{PacketList|{{change|0x4A|0x4B}}|Set Passengers|pre=unchanged}}
{{PacketList|{{change|0x49|0x4C}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x4B|0x4C}}|Teams|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4D}}|Player List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x4C|0x4D}}|Update Score|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4E}}|Collect Item|pre=unchanged}}
+
{{PacketList|{{change|0x4D|0x4E}}|Spawn Position|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}}
!colspan="4"| Play serverbound
+
{{PacketList|{{change|0x55|0x56}}|Collect Item|pre=unchanged}}
{{PacketList|{{change|0x02|0x01}}|Chat Message (serverbound)|pre=unchanged}}
+
{{PacketList|{{change|0x56|0x57}}|Entity Teleport|pre=unchanged}}
{{PacketList|{{change|0x03|0x02}}|Client Status|pre=unchanged}}
+
{{PacketList|{{change|0x57|0x58}}|Advancements|pre=unchanged}}
{{PacketList|{{change|0x04|0x03}}|Client Settings|pre=unchanged}}
+
{{PacketList|{{change|0x58|0x59}}|Entity Properties|pre=unchanged}}
{{PacketList|{{change|0x01|0x04}}|Tab-Complete (serverbound)}}
+
{{PacketList|{{change|0x59|0x5A}}|Entity Effect|pre=unchanged}}
{{PacketList|0x12|Craft Recipe Request}}
+
{{PacketList|{{change|0x5A|0x5B}}|Declare Recipes|pre=unchanged}}
{{PacketList|0x17|Recipe Book Data}}
+
{{PacketList|{{change|0x5B|0x5C}}|Tags|pre=unchanged}}
 
  |}
 
  |}
  
 
== 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 ===
+
{{warning2|Lots of shifts, of course}}
  
{| class="wikitable"
+
=== Living ===
! 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"
+
Extends [[#Entity|Entity]].
|-
 
! Particle Name
 
! Particle ID
 
! Data
 
|-
 
| <code>minecraft:ambient_entity_effect</code>
 
| 0
 
| None
 
|-
 
| <code>minecraft:angry_villager</code>
 
| 1
 
| None
 
|-
 
| <code>minecraft:barrier</code>
 
| 2
 
| None
 
|-
 
| <code>minecraft:block</code>
 
| 3
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | BlockState
 
  | VarInt
 
  | The ID of the block state.
 
  |}
 
|-
 
| <code>minecraft:bubble</code>
 
| 4
 
| None
 
|-
 
| <code>minecraft:cloud</code>
 
| 5
 
| None
 
|-
 
| <code>minecraft:crit</code>
 
| 6
 
| None
 
|-
 
| <code>minecraft:damage_indicator</code>
 
| 7
 
| None
 
|-
 
| <code>minecraft:dragon_breath</code>
 
| 8
 
| None
 
|-
 
| <code>minecraft:dripping_lava</code>
 
| 9
 
| None
 
|-
 
| <code>minecraft:dripping_water</code>
 
| 10
 
| None
 
|-
 
| <code>minecraft:dust</code>
 
| 11
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | Red
 
  | Float
 
  | Red value, 0-1
 
  |-
 
  | Green
 
  | Float
 
  | Green value, 0-1
 
  |-
 
  | Blue
 
  | Float
 
  | Blue value, 0-1
 
  |-
 
  | Scale
 
  | Float
 
  | The scale, will be clamped between 0.01 and 4.
 
  |}
 
|-
 
| <code>minecraft:effect</code>
 
| 12
 
| None
 
|-
 
| <code>minecraft:elder_guardian</code>
 
| 13
 
| None
 
|-
 
| <code>minecraft:enchanted_hit</code>
 
| 14
 
| None
 
|-
 
| <code>minecraft:enchant</code>
 
| 15
 
| None
 
|-
 
| <code>minecraft:end_rod</code>
 
| 16
 
| None
 
|-
 
| <code>minecraft:entity_effect</code>
 
| 17
 
| None
 
|-
 
| <code>minecraft:explosion_emitter</code>
 
| 18
 
| None
 
|-
 
| <code>minecraft:explosion</code>
 
| 19
 
| None
 
|-
 
| <code>minecraft:falling_dust</code>
 
| 20
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | BlockState
 
  | VarInt
 
  | The ID of the block state.
 
  |}
 
|-
 
| <code>minecraft:firework</code>
 
| 21
 
| None
 
|-
 
| <code>minecraft:fishing</code>
 
| 22
 
| None
 
|-
 
| <code>minecraft:flame</code>
 
| 23
 
| None
 
|-
 
| <code>minecraft:happy_villager</code>
 
| 24
 
| None
 
|-
 
| <code>minecraft:heart</code>
 
| 25
 
| None
 
|-
 
| <code>minecraft:instant_effect</code>
 
| 26
 
| None
 
|-
 
| <code>minecraft:item</code>
 
| 27
 
|
 
{| class="wikitable"
 
  ! Field Name
 
  ! Field Type
 
  ! Meaning
 
  |-
 
  | Item
 
  | [[Slot]]
 
  | The item that will be used.
 
  |}
 
|-
 
| <code>minecraft:item_slime</code>
 
| 28
 
| None
 
|-
 
| <code>minecraft:item_snowball</code>
 
| 29
 
| None
 
|-
 
| <code>minecraft:large_smoke</code>
 
| 30
 
| None
 
|-
 
| <code>minecraft:lava</code>
 
| 31
 
| None
 
|-
 
| <code>minecraft:mycelium</code>
 
| 32
 
| None
 
|-
 
| <code>minecraft:note</code>
 
| 33
 
| None
 
|-
 
| <code>minecraft:poof</code>
 
| 34
 
| None
 
|-
 
| <code>minecraft:portal</code>
 
| 35
 
| None
 
|-
 
| <code>minecraft:rain</code>
 
| 36
 
| None
 
|-
 
| <code>minecraft:smoke</code>
 
| 37
 
| None
 
|-
 
| <code>minecraft:spit</code>
 
| 38
 
| None
 
|-
 
| <code>minecraft:squid_ink</code>
 
| 39
 
| None
 
|-
 
| <code>minecraft:sweep_attack</code>
 
| 40
 
| None
 
|-
 
| <code>minecraft:totem_of_undying</code>
 
| 41
 
| None
 
|-
 
| <code>minecraft:underwater</code>
 
| 42
 
| None
 
|-
 
| <code>minecraft:splash</code>
 
| 43
 
| None
 
|-
 
| <code>minecraft:witch</code>
 
| 44
 
| None
 
|-
 
| <code>minecraft:bubble_pop</code>
 
| 45
 
| None
 
|-
 
| <code>minecraft:current_down</code>
 
| 46
 
| None
 
|-
 
| <code>minecraft:bubble_column_up</code>
 
| 47
 
| None
 
|}
 
 
 
== Entity Metadata Format ==
 
 
 
Note that entity metadata is a totally distinct concept from block metadata.  It is not required to send all metadata fields, or even any metadata fields, so long as the terminating entry is correctly sent.
 
 
 
Entity Metadata is an array of entries, each of which looks like the following:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Meaning
 
|-
 
| Index
 
| Unsigned Byte
 
| Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
 
|-
 
| Type
 
| Optional Byte Enum
 
| Only if Index is not <code>0xff</code>; the type of the index, see the table below
 
|-
 
| Value
 
| Optional ''value of Type''
 
| Only if Index is not <code>0xff</code>: the value of the metadata field
 
|}
 
 
 
{| class="wikitable"
 
! Value of Type field
 
! [[Data types|Type]] of Value field
 
! Notes
 
|-
 
| 0
 
| Byte
 
|
 
|-
 
| 1
 
| VarInt
 
|
 
|-
 
| 2
 
| Float
 
|
 
|-
 
| 3
 
| String
 
|
 
|-
 
| 4
 
| [[Chat]]
 
|
 
|- style="background-color: #d9ead3;"
 
| 5
 
| OptChat (Boolean + Optional [[Chat]])
 
| [[Chat]] is present if the Boolean is set to true
 
|-
 
| {{change|5|6}}
 
| [[Slot]]
 
|
 
|-
 
| {{change|6|7}}
 
| Boolean
 
|
 
|-
 
| {{change|7|8}}
 
| Rotation
 
| 3 floats: rotation on x, rotation on y, rotation on z
 
|-
 
| {{change|8|9}}
 
| [[Data Types#Position|Position]]
 
|
 
|-
 
| {{change|9|10}}
 
| OptPosition (Boolean + Optional Position)
 
| Position is present if the Boolean is set to true
 
|-
 
| {{change|10|11}}
 
| Direction (VarInt)
 
| (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
|-
 
| {{change|11|12}}
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|-
 
| {{change|12|13}}
 
| OptBlockID (VarInt)
 
| 0 for absent, otherwise index into the global palette.  (Air is treated as absent)
 
|-
 
| {{change|13|14}}
 
| [[NBT|NBT Tag]]
 
|
 
|- style="background-color: #d9ead3;"
 
| 15
 
| [[#Particle]]
 
|
 
|}
 
 
 
=== Entity ===
 
 
 
The base class.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 505: Line 129:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="9"| 0
+
  |rowspan="5"| 7
  |rowspan="9"| Byte
+
  |rowspan="5"| Byte
 +
|colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
 +
|rowspan="5"| 0
 +
|-
 
  ! Bit mask
 
  ! Bit mask
 
  ! Meaning
 
  ! Meaning
|rowspan="9"| 0
 
 
  |-
 
  |-
 
  | 0x01
 
  | 0x01
  | On Fire
+
  | Is hand active
 
  |-
 
  |-
 
  | 0x02
 
  | 0x02
  | Crouched
+
  | Active hand (0 = main hand, 1 = offhand)
 
  |-
 
  |-
 
  | 0x04
 
  | 0x04
  | Unused (previously riding)
+
  | In riptide spin attack
|-
 
| 0x08
 
| Sprinting
 
|-
 
| 0x10
 
| Unused (previously eating/drinking/blocking; use hand state now)
 
|-
 
| 0x20
 
| Invisible
 
|-
 
| 0x40
 
| Glowing effect
 
|-
 
| 0x80
 
| Flying with {{Minecraft Wiki|elytra}}
 
|-
 
| 1
 
| VarInt
 
|colspan="2"| Air
 
| 300
 
|-
 
| 2
 
| {{change|String|OptChat}}
 
|colspan="2"| Custom name
 
| empty
 
|-
 
| 3
 
| Boolean
 
|colspan="2"| Is custom name visible
 
| false
 
|-
 
| 4
 
| Boolean
 
|colspan="2"| Is silent
 
| false
 
|-
 
| 5
 
| Boolean
 
|colspan="2"| No gravity
 
| false
 
|}
 
 
 
=== AreaEffectCloud ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| Float
 
|colspan="2"| Radius
 
| 0.5
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Color (only for mob spell particle)
 
| 0
 
|-
 
| 8
 
| Boolean
 
|colspan="2"| Ignore radius and show effect as single point, not area
 
| false
 
|- style="background-color: #d9ead3;"
 
| 9
 
| Particle
 
| colspan="2"| The [[#Particle]]
 
| <code>effect</code>
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 9
 
| VarInt
 
|colspan="2"| Particle ID
 
| 15 (mobSpell)
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 10
 
| VarInt
 
|colspan="2"| Particle parameter 1
 
| 0
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 11
 
| VarInt
 
|colspan="2"| Particle parameter 2
 
| 0
 
|}
 
 
 
=== Trident ===
 
 
 
Extends [[#Arrow|Arrow]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Loyalty level (enchantment)
 
| 0
 
|}
 
 
 
=== Boat ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| VarInt
 
|colspan="2"| Time since last hit
 
| 0
 
|-
 
| 7
 
| VarInt
 
|colspan="2"| Forward direction
 
| 1
 
 
  |-
 
  |-
 
  | 8
 
  | 8
 
  | Float
 
  | Float
  |colspan="2"| Damage taken
+
  |colspan="2"| Health
  | 0.0
+
  | 1.0
 
  |-
 
  |-
 
  | 9
 
  | 9
 
  | VarInt
 
  | VarInt
  |colspan="2"| Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak)
+
  |colspan="2"| Potion effect color (or 0 if there is no effect)
 
  | 0
 
  | 0
 
  |-
 
  |-
 
  | 10
 
  | 10
 
  | Boolean
 
  | Boolean
  |colspan="2"| Right paddle turning
+
  |colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
 
  | false
 
  | false
 
  |-
 
  |-
 
  | 11
 
  | 11
| Boolean
 
|colspan="2"| Left paddle turning
 
| false
 
|- style="background-color: #d9ead3;"
 
| 12
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Splash timer (?)
+
  |colspan="2"| Number of arrows in entity
 
  | 0
 
  | 0
  |}
+
  |- {{Added}}
 
 
=== Phantom ===
 
 
 
Extends [[#Flying|Flying]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
 
  | 12
 
  | 12
 
  | VarInt
 
  | VarInt
  |colspan="2"| Size
+
  |colspan="2"| Unknown
 
  | 0
 
  | 0
 +
|-
 +
| {{change|12|13}}
 +
| OptBlockPos
 +
|colspan="2"| Unknown (Bed location?)
 +
| Absent
 
  |}
 
  |}
  
Hitbox size is determined by horizontal=0.9 + 0.2*size and vertical=0.5 + 0.1 * i
+
=== Bee ===
 
 
=== Dolphin ===
 
  
Extends [[#Creature|Creature]].
+
Extends [[#Insentient|Insentient]].
  
No additional metadata.
+
{| class="wikitable" {{added}}
 
 
=== WaterMob ===
 
 
 
Extends {{Change|[[#Insentient|Insentient]]|[[#Creature|Creature]]}}.
 
 
 
No additional metadata.
 
 
 
=== Abstract fish ===
 
 
 
Extends [[#WaterMob|WaterMob]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 709: Line 187:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 12
+
  | 16
  | Boolean
+
  | Byte
  |colspan="2"| From bucket
+
  |colspan="2"| Unknown
  | False
+
  | 0
|}
 
 
 
=== 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
+
  | 17
 
  | VarInt
 
  | VarInt
  |colspan="2"| PuffState (varies from 0 to 2)
+
  |colspan="2"| Unknown
 
  | 0
 
  | 0
 
  |}
 
  |}
  
=== Salmon ===
+
=== Wolf ===
  
Extends [[#AbstractFish|AbstractFish]].
+
Extends [[#TameableAnimal|TameableAnimal]].
  
No additional metadata.
+
{| class="wikitable"
 
 
=== Tropical fish ===
 
 
 
Extends [[#AbstractFish|AbstractFish]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
 +
|- {{removed}}
 +
| {{change|17|18}}
 +
| Float
 +
|colspan="2"| Damage taken (used for tail rotation)
 +
| Value of health field (1.0)
 +
|-
 +
| 18
 +
| Boolean
 +
|colspan="2"| Is begging
 +
| false
 
  |-
 
  |-
  | 13
+
  | 19
 
  | VarInt
 
  | VarInt
  |colspan="2"| Variant
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
  | 0
+
  | 14 (Red)
 
  |}
 
  |}
  
=== Turtle ===
+
=== Enderman ===
  
Extends [[#Animal|Animal]].
+
Extends [[#Monster|Monster]].
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
|-
 
| 13
 
| BlockPos
 
|colspan="2"| Home pos
 
| (0, 0, 0)
 
|-
 
| 14
 
| Boolean
 
|colspan="2"| Has egg
 
| false
 
 
  |-
 
  |-
 
  | 15
 
  | 15
  | Boolean
+
  | Opt BlockID
  |colspan="2"| Laying egg (?)
+
  |colspan="2"| Carried block
  | false
+
  | Absent
 
  |-
 
  |-
 
  | 16
 
  | 16
| BlockPos
 
|colspan="2"| Travel pos
 
| (0, 0, 0)
 
|-
 
| 17
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Going home
+
  |colspan="2"| Is screaming
 
  | false
 
  | false
  |-
+
  |- {{added}}
  | 18
+
  | 17
 
  | Boolean
 
  | Boolean
  |colspan="2"| Traveling
+
  |colspan="2"| Unknown
 
  | false
 
  | false
 
  |}
 
  |}
  
=== Drowned ===
+
=== Trident ===
  
Extends [[#Drowned|Drowned]].
+
Extends [[#Arrow|Arrow]].
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
  |-  
+
  |-
  | 15
+
  | 10
 +
| VarInt
 +
|colspan="2"| Loyalty level (enchantment)
 +
| 0
 +
|- {{Added}}
 +
| 11
 
  | Boolean
 
  | Boolean
  |colspan="2"| Has target (?)
+
  |colspan="2"| Unknown
  | false
+
  | False
 
  |}
 
  |}
 +
  
 
== Block Actions ==
 
== Block Actions ==
  
No changes so far.  
+
No changes so far.
  
== Plugin Channels ==
+
== Inventories ==
  
=== <code>MC|StopSound</code> ===
+
No changes so far.
  
{{Change|''Server to client''}}
+
== Plugin Channels ==
 
 
{{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> ===
+
No changes so far.
 
 
Never sent, but (presumably) used to debug something with world generation. Does not render without modifying the client.
 
 
 
{{warning|This channel is invalid, as its name is longer than the max length (23 > 20).}}
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Field name
 
! Field type
 
! Notes
 
|-
 
| Unknown 1
 
| Position
 
|
 
|-
 
| Unknown 2
 
| Float
 
|
 
|-
 
| Unknown 3
 
| Float
 
|
 
|-
 
| Unknown 4
 
| Float
 
|
 
|-
 
| Unknown 5
 
| Float
 
|
 
|-
 
| Unknown 6
 
| Float
 
|
 
|}
 
  
 
== Play ==
 
== Play ==
  
 
=== Clientbound ===
 
=== Clientbound ===
 +
==== Spawn Mob ====
  
==== Spawn Painting ====
+
Sent by the server when a mob entity is spawned.
 
 
This packet shows location, name, and type of painting.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 988: Line 299:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| 0x04
+
  |rowspan="13"| 0x03
  |rowspan="5"| Play
+
  |rowspan="13"| Play
  |rowspan="5"| Client
+
  |rowspan="13"| Client
 
  | Entity ID
 
  | Entity ID
 
  | VarInt
 
  | VarInt
Line 999: Line 310:
 
  |  
 
  |  
 
  |-
 
  |-
  | Motive
+
  | Type
  | {{Change|String (13)|VarInt}}
+
  | VarInt
  | {{Change|Name of the painting. Max length 13|Panting's ID, see below}}
+
  | The type of mob. See [[Entities#Mobs]]
 
  |-
 
  |-
  | Location
+
  | X
  | Position
+
  | Double
  | Center coordinates (see below)
+
  |  
 
  |-
 
  |-
  | Direction
+
  | Y
  | Byte Enum
+
  | Double
  | Direction the painting faces (North = 2, South = 0, West = 1, East = 3)
+
  |  
|}
 
 
 
Calculating the center of an image: given a (width × height) grid of cells, with <code>(0, 0)</code> being the top left corner, the center is <code>(max(0, width / 2 - 1), height / 2)</code>. E.g. <code>(1, 0)</code> for a 2×1 painting, or <code>(1, 2)</code> for a 4×4 painting.
 
 
 
List of paintings by coordinates in <code>paintings_kristoffer_zetterstrand.png</code> (where x and y are in pixels from the top left and width and height are in pixels or 16ths of a block):
 
 
 
{| class="wikitable"
 
! Name
 
!style="background-color: #d9ead3;"| ID
 
! x
 
! y
 
! width
 
! height
 
 
  |-
 
  |-
  | {{Change|<code>Kebab</code>|<code>minecraft:kebab</code>}}
+
  | Z
| 0
+
  | Double
| 0
+
  |  
| 0
 
  | 16
 
  | 16
 
 
  |-
 
  |-
  | {{Change|<code>Aztec</code>|<code>minecraft:aztec</code>}}
+
  | Yaw
| 1
+
  | Angle
| 16
+
  |  
| 0
 
  | 16
 
  | 16
 
 
  |-
 
  |-
  | {{change|<code>Alban</code>|<code>minecraft:alban</code>}}
+
  | Pitch
| 2
+
  | Angle
| 32
+
  |  
| 0
 
  | 16
 
  | 16
 
 
  |-
 
  |-
  | {{change|<code>Aztec2</code>|<code>minecraft:aztec2</code>}}
+
  | Head Pitch
| 3
+
  | Angle
| 48
+
  |  
| 0
 
  | 16
 
  | 16
 
 
  |-
 
  |-
  | {{change|<code>Bomb</code>|<code>minecraft:bomb</code>}}
+
  | Velocity X
| 4
+
  | Short
  | 64
+
  | Same units as [[#Entity Velocity|Entity Velocity]]
  | 0
 
| 16
 
| 16
 
 
  |-
 
  |-
  | {{change|<code>Plant</code>|<code>minecraft:plant</code>}}
+
  | Velocity Y
| 5
+
  | Short
  | 80
+
  | Same units as [[#Entity Velocity|Entity Velocity]]
  | 0
 
| 16
 
| 16
 
 
  |-
 
  |-
  | {{change|<code>Wasteland</code>|<code>minecraft:wasteland</code>}}
+
  | Velocity Z
| 6
+
  | Short
| 96
+
  | Same units as [[#Entity Velocity|Entity Velocity]]
| 0
+
  |- {{removed}}
| 16
+
  | Metadata
| 16
+
  | [[Entities#Entity Metadata Format|Entity Metadata]]
|-
+
  |  
| {{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.
+
==== Spawn Player ====
 +
 
 +
This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
  
==== Statistics ====
+
This packet must be sent after the [[#Player Info|Player Info]] packet that adds the player data for the client to use when spawning a player. If the Player Info for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player Info packet includes skin/cape data.
  
Sent as a response to [[#Client_Status|Client Status]] (id 1).
+
Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
  ! Bound To  
+
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
  !colspan="2"| Field Type
+
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| 0x07
+
  |rowspan="8"| 0x05
  |rowspan="6"| Play
+
  |rowspan="8"| Play
  |rowspan="6"| Client
+
  |rowspan="8"| Client
  |colspan="2"| Count
+
  | Entity ID
|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
 
  | VarInt
  | See below
+
  | Player's EID
 
  |-
 
  |-
  | Value
+
  | Player UUID
  | VarInt
+
  | UUID
  | The amount to set it to
+
  | See below for notes on {{Minecraft Wiki|Server.properties#online-mode|offline mode}} and NPCs
|}
 
 
 
Categories (these are namespaced, but with <code>:</code>. replaced with <code>.</code>):
 
 
 
{| class="wikitable"
 
! Name
 
! ID
 
! Registry
 
 
  |-
 
  |-
  | <code>minecraft.mined</code>
+
  | X
  | 0
+
  | Double
  | Blocks
+
  |  
 
  |-
 
  |-
  | <code>minecraft.crafted</code>
+
  | Y
  | 1
+
  | Double
  | Items
+
  |  
 
  |-
 
  |-
  | <code>minecraft.used</code>
+
  | Z
  | 2
+
  | Double
  | Items
+
  |  
 
  |-
 
  |-
  | <code>minecraft.broken</code>
+
  | Yaw
  | 3
+
  | Angle
  | Items
+
  |  
 
  |-
 
  |-
  | <code>minecraft.picked_up</code>
+
  | Pitch
  | 4
+
  | Angle
  | Items
+
  |  
  |-
+
  |- {{removed}}
  | <code>minecraft.dropped</code>
+
  | Metadata
| 5
+
  | [[Entities#Entity Metadata Format|Entity Metadata]]
| 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.
+
When in {{Minecraft Wiki|Server.properties#online-mode|online mode}}, the UUIDs must be valid and have valid skin blobs.
  
Custom has the following (unit only matters for clients):
+
In offline mode, [[Wikipedia:Universally unique identifier#Versions 3 and 5 (namespace name-based)|UUID v3]] is used with the String <code>OfflinePlayer:&lt;player name&gt;</code>, encoded in UTF-8 (and case-sensitive).
  
{| class="wikitable"
+
For NPCs UUID v2 should be used. Note:
! Name
 
! ID
 
! Unit
 
|-
 
| <code>minecraft.leave_game</code>
 
| 0
 
| None
 
|-
 
| <code>minecraft.play_one_minute</code>
 
| 1
 
| Time
 
|-
 
| <code>minecraft.time_since_death</code>
 
| 2
 
| Time
 
|-
 
| <code>minecraft.sneak_Time</code>
 
| 3
 
| Time
 
|-
 
| <code>minecraft.walk_one_cm</code>
 
| 4
 
| Distance
 
|-
 
| <code>minecraft.crouch_one_cm</code>
 
| 5
 
| Distance
 
|-
 
| <code>minecraft.sprint_one_cm</code>
 
| 6
 
| Distance
 
|-
 
| <code>minecraft.swim_one_cm</code>
 
| 7
 
| Distance
 
|-
 
| <code>minecraft.fall_one_cm</code>
 
| 8
 
| Distance
 
|-
 
| <code>minecraft.climb_one_cm</code>
 
| 9
 
| Distance
 
|-
 
| <code>minecraft.fly_one_cm</code>
 
| 10
 
| Distance
 
|-
 
| <code>minecraft.dive_one_cm</code>
 
| 11
 
| Distance
 
|-
 
| <code>minecraft.minecart_one_cm</code>
 
| 12
 
| Distance
 
|-
 
| <code>minecraft.boat_one_cm</code>
 
| 13
 
| Distance
 
|-
 
| <code>minecraft.pig_one_cm</code>
 
| 14
 
| Distance
 
|-
 
| <code>minecraft.horse_one_cm</code>
 
| 15
 
| Distance
 
|-
 
| <code>minecraft.aviate_one_cm</code>
 
| 16
 
| Distance
 
|-
 
| <code>minecraft.jump</code>
 
| 17
 
| None
 
|-
 
| <code>minecraft.drop</code>
 
| 18
 
| None
 
|-
 
| <code>minecraft.damage_dealt</code>
 
| 19
 
| Damage
 
|-
 
| <code>minecraft.damage_taken</code>
 
| 20
 
| Damage
 
|-
 
| <code>minecraft.deaths</code>
 
| 21
 
| None
 
|-
 
| <code>minecraft.mob_kills</code>
 
| 22
 
| None
 
|-
 
| <code>minecraft.animals_bred</code>
 
| 23
 
| None
 
|-
 
| <code>minecraft.player_kills</code>
 
| 24
 
| None
 
|-
 
| <code>minecraft.fish_caught</code>
 
| 25
 
| None
 
|-
 
| <code>minecraft.talked_to_villager</code>
 
| 26
 
| None
 
|-
 
| <code>minecraft.traded_with_villager</code>
 
| 27
 
| None
 
|-
 
| <code>minecraft.eat_cake_slice</code>
 
| 28
 
| None
 
|-
 
| <code>minecraft.fill_cauldron</code>
 
| 29
 
| None
 
|-
 
| <code>minecraft.use_cauldron</code>
 
| 30
 
| None
 
|-
 
| <code>minecraft.clean_armor</code>
 
| 31
 
| None
 
|-
 
| <code>minecraft.clean_banner</code>
 
| 32
 
| None
 
|-
 
| <code>minecraft.interact_with_brewingstand</code>
 
| 33
 
| None
 
|-
 
| <code>minecraft.interact_with_beacon</code>
 
| 34
 
| None
 
|-
 
| <code>minecraft.inspect_dropper</code>
 
| 35
 
| None
 
|-
 
| <code>minecraft.inspect_hopper</code>
 
| 36
 
| None
 
|-
 
| <code>minecraft.inspect_dispenser</code>
 
| 37
 
| None
 
|-
 
| <code>minecraft.play_noteblock</code>
 
| 38
 
| None
 
|-
 
| <code>minecraft.tune_noteblock</code>
 
| 39
 
| None
 
|-
 
| <code>minecraft.pot_flower</code>
 
| 40
 
| None
 
|-
 
| <code>minecraft.trigger_trapped_chest</code>
 
| 41
 
| None
 
|-
 
| <code>minecraft.open_enderchest</code>
 
| 42
 
| None
 
|-
 
| <code>minecraft.enchant_item</code>
 
| 43
 
| None
 
|-
 
| <code>minecraft.play_record</code>
 
| 44
 
| None
 
|-
 
| <code>minecraft.interact_with_furnace</code>
 
| 45
 
| None
 
|-
 
| <code>minecraft.interact_with_crafting_table</code>
 
| 46
 
| None
 
|-
 
| <code>minecraft.open_chest</code>
 
| 47
 
| None
 
|-
 
| <code>minecraft.sleep_in_bed</code>
 
| 48
 
| None
 
|-
 
| <code>minecraft.open_shulker_box</code>
 
| 49
 
| None
 
|}
 
  
Units:
+
<+Grum> i will never confirm this as a feature you know that :)
  
* None: just a normal number (formatted with 0 decimal places)
+
In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
* 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 ====
 
==== Update Block Entity ====
  
Sets tile entity associated with the block at the given location.
+
Sets the block entity associated with the block at the given location.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,520: Line 429:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x09
+
  |rowspan="3"| {{change|0x09|0x0A}}
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
 
  |rowspan="3"| Client
 
  |rowspan="3"| Client
Line 1,542: Line 451:
 
* '''3''': Set the level, primary, and secondary powers of a beacon
 
* '''3''': Set the level, primary, and secondary powers of a beacon
 
* '''4''': Set rotation and skin of mob head
 
* '''4''': Set rotation and skin of mob head
* {{Change|'''5''': Set type of flower in flower pot}}
+
* '''5''': Declare a conduit
* {{Change||'''5''': Declare a conduit}}
 
 
* '''6''': Set base color and patterns on a banner
 
* '''6''': Set base color and patterns on a banner
 
* '''7''': Set the data for a Structure tile entity
 
* '''7''': Set the data for a Structure tile entity
 
* '''8''': Set the destination for a end gateway
 
* '''8''': Set the destination for a end gateway
 
* '''9''': Set the text on a sign
 
* '''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?
+
* '''10''': Unused
* '''11''': {{change|Set the color of a bed|Declare a bed}}
+
* '''11''': Declare a bed
 
+
* '''12''': Set data of a jigsaw block
==== Block Change ====
+
* '''13''': Set items in a campfire
 
+
* {{change||'''14''': Beehive information}}
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
 
| The new block state ID for the block as given in the [[#global palette|global palette]].  {{change|(When reading data: <code>type {{=}} id >> 4</code>, <code>meta {{=}} id & 15</code>, when writing data: <code>id {{=}} type << 4 {{!}} (meta & 15)</code>)|See that section for more information.}}
 
|}
 
 
 
==== Multi Block Change ====
 
 
 
Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
 
 
 
{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Change|Block Change]]).}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x10|0x0F}}
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Chunk X
 
|colspan="2"| Int
 
| Chunk X coordinate
 
|-
 
|colspan="2"| Chunk Z
 
|colspan="2"| Int
 
| Chunk Z coordinate
 
|-
 
|colspan="2"| Record Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array, i.e. the number of blocks affected
 
|-
 
|rowspan="3"| Record
 
| Horizontal Position
 
|rowspan="3"| Array
 
| Unsigned Byte
 
| The 4 most significant bits (<code>0xF0</code>) encode the X coordinate, relative to the chunk. The 4 least significant bits (<code>0x0F</code>) encode the Z coordinate, relative to the chunk.
 
|-
 
| Y Coordinate
 
| Unsigned Byte
 
| Y coordinate of the block
 
|-
 
| Block ID
 
| VarInt
 
| The new block state ID for the block as given in the [[#global palette|global palette]].  {{change|(When reading data: <code>type {{=}} id >> 4</code>, <code>meta {{=}} id & 15</code>, when writing data: <code>id {{=}} type << 4 {{!}} (meta & 15)</code>)|See that section for more information.}}
 
|}
 
 
 
To decode the position into a world position:
 
 
 
<syntaxhighlight lang="java">
 
worldX = (horizPos >> 4 & 15) + (chunkX * 16);
 
worldY = vertPos;
 
worldZ = (horizPos & 15) + (chunkZ * 16);
 
</syntaxhighlight>
 
 
 
 
 
==== Tab-Complete (clientbound) ====
 
 
 
Used to respond to the client's previous tab complete request.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"|  Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x0E|0x10}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
|colspan="2" style="background-color: #d9ead3;"| Transaction Id
 
|colspan="2" style="background-color: #d9ead3;"| VarInt
 
|style="background-color: #d9ead3;"| This id should also be used in the tab completion response packet, or it will be ignored.
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Start
 
|colspan="2"|  VarInt
 
| Start of the text to replace
 
|- style="background-color: #d9ead3;"
 
|colspan="2"|  Length
 
|colspan="2"|  VarInt
 
| Length of the text to replace
 
|-
 
|colspan="2"|  Count
 
|colspan="2"|  VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="3"| Matches
 
| Match
 
|rowspan="3"| Array
 
| String (32767)
 
| One eligible {{change|command|value to insert}}, note that each command is sent separately instead of in a single string, hence the need for Count.  {{change||Note that for instance this doesn't include a leading <code>/</code> on commands.}}
 
|-
 
|style="background-color: #d9ead3;"| Has tooltip
 
|style="background-color: #d9ead3;"| Boolean
 
|style="background-color: #d9ead3;"| True if the following is present
 
|-
 
|style="background-color: #d9ead3;"| Tooltip
 
|style="background-color: #d9ead3;"| Optional [[Chat]]
 
|style="background-color: #d9ead3;"| Tooltip to display; only present if previous Boolean is true
 
|}
 
 
 
==== Declare Commands ====
 
 
 
Lists all of the commands on the server, and how they are parsed.
 
 
 
This is a tree, with one root node.  Each redirect or child node must refer only to nodes that have already been declared.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x11
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Nodes
 
| Array of Node
 
| A array of <code>CommandNode</code>s
 
|-
 
| Root index
 
| VarInt
 
| Index of the <code>RootCommandNode</code> in the previous array
 
|}
 
 
 
Node:
 
 
 
{| class="wikitable"
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| Flags
 
| Byte
 
|
 
  {| class="wikitable"
 
  ! Bit mask
 
  !colspan="2"| Meaning
 
  |-
 
  |rowspan="4"| 0x03
 
  |colspan="2"| Type of the <code>CommandNode</code>
 
  |-
 
  |0
 
  |<code>RootCommandNode</code>
 
  |-
 
  |1
 
  |<code>LiteralCommandNode</code>
 
  |-
 
  |2
 
  |<code>ArgumentCommandNode</code>
 
  |-
 
  |0x04
 
  |colspan="2"| Has command
 
  |-
 
  |0x08
 
  |colspan="2"| Has redirect node
 
  |-
 
  |0x10
 
  |colspan="2"| Has custom suggestions, currently only present if the type is a <code>ArgumentCommandNode</code>
 
  |}
 
|-
 
| Children Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Children
 
| Array of VarInt
 
| The indexes of the children <code>CommandNode</code>s within the <code>Nodes</code> array
 
|-
 
| Redirect node
 
| Optional VarInt
 
| Only if flags & 0x08. Points to the redirect <code>CommandNode</code> within the <code>Nodes</code> array
 
|-
 
| Extra node data
 
| Extra node data
 
| Type depends on the <code>CommandNode</code> type, see below.
 
|}
 
 
 
Extra node data:
 
{| class="wikitable"
 
! Type
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| <code>RootCommandNode</code>
 
| Empty
 
| Empty
 
|
 
|-
 
| <code>LiteralCommandNode</code>
 
| Literal
 
| String (32767)
 
| The text
 
|-
 
|rowspan="4"| <code>ArgumentCommandNode</code>
 
| Name
 
| String (32767)
 
| The name of the argument
 
|-
 
| Parser
 
| Identifier
 
| One of several known to the client, listed below.  If the client does not know the parser, reading this RequiredArgumentBuilder stops immediately (following fields are not read)
 
|-
 
| Properties
 
| Optional, varies
 
| See below.  Varies depending on the parser.
 
|-
 
| Suggests
 
| Optional Identifier
 
| Only present if (flags & 0x10) != 0. See below for the available types.
 
|}
 
 
 
Parsers:
 
 
 
{| class="wikitable"
 
! Identifier
 
! Description
 
! Properties
 
|-
 
| <code>brigadier:bool</code>
 
| Boolean value (<code>true</code> or <code>false</code>, case-sensitive)
 
| None
 
|-
 
| <code>brigadier:double</code>
 
| Double
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional double
 
  | Only if flags & 0x01.  If not specified, defaults to <code>-Double.MAX_VALUE</code> (≈ -1.7976931348623157E307)
 
  |-
 
  | Max
 
  | Optional double
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Double.MAX_VALUE</code> (≈ 1.7976931348623157E307)
 
  |}
 
|-
 
| <code>brigadier:float</code>
 
| Float
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional float
 
  | Only if flags & 0x01.  If not specified, defaults to <code>-Float.MAX_VALUE</code> (≈ -3.4028235E38)
 
  |-
 
  | Max
 
  | Optional float
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Float.MAX_VALUE</code> (≈ 3.4028235E38)
 
  |}
 
|-
 
| <code>brigadier:integer</code>
 
| Integer
 
| Specifies min and max values:
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Flags
 
  | Byte
 
  |
 
  |-
 
  | Min
 
  | Optional integer
 
  | Only if flags & 0x01.  If not specified, defaults to <code>Integer.MIN_VALUE</code> (-2147483648)
 
  |-
 
  | Max
 
  | Optional integer
 
  | Only if flags & 0x02.  If not specified, defaults to <code>Integer.MAX_VALUE</code> (2147483647)
 
  |}
 
|-
 
| <code>brigadier:string</code>
 
| A string
 
| A VarInt enum:
 
  {| class="wikitable"
 
  ! Value
 
  ! Name
 
  ! Description
 
  |-
 
  | 0
 
  | <code>SINGLE_WORD</code>
 
  | Reads a single word
 
  |-
 
  | 1
 
  | <code>QUOTABLE_PHRASE</code>
 
  | If it starts with a <code>"</code>, keeps reading until another <code>"</code> (allowing escaping with <code>\</code>).  Otherwise behaves the same as <code>SINGLE_WORD</code>
 
  |-
 
  | 2
 
  | <code>GREEDY_PHRASE</code>
 
  | Reads the rest of the content after the cursor.  Quotes will not be removed.
 
  |}
 
|-
 
| <code>minecraft:entity</code>
 
| A selector, player name, or UUID.
 
| Has a single flags byte:
 
  {| class="wikitable"
 
  ! Bit mask
 
  ! Meaning
 
  |-
 
  | 0x01
 
  | If set, only allows a single entity/player
 
  |-
 
  | 0x02
 
  | If set, only allows players
 
  |}
 
|-
 
| <code>minecraft:game_profile</code>
 
| A player, online or not.  Can also use a selector, which may match one or more players (but not entities).
 
| None
 
|-
 
| <code>minecraft:block_pos</code>
 
| A location, represented as 3 numbers (which must be integers).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:vec3</code>
 
| A location, represented as 3 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:vec2</code>
 
| A location, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:block_state</code>
 
| A block state, optionally including NBT and state information.
 
| None
 
|-
 
| <code>minecraft:block_predicate</code>
 
| A block, or a block tag.
 
| None
 
|-
 
| <code>minecraft:item_stack</code>
 
| An item, optionally including NBT.
 
| None
 
|-
 
| <code>minecraft:item_predicate</code>
 
| An item, or an item tag.
 
| None
 
|-
 
| <code>minecraft:color</code>
 
| A chat color.  One of the names from [[Chat#Colors]], or <code>reset</code>.  Case-insensitive.
 
| None
 
|-
 
| <code>minecraft:component</code>
 
| A JSON [[Chat]] component.
 
| None
 
|-
 
| <code>minecraft:message</code>
 
| A regular message, potentially including selectors.
 
| None
 
|-
 
| <code>minecraft:nbt</code>
 
| An NBT value, parsed using JSON-NBT rules.
 
| None
 
|-
 
| <code>minecraft:nbt_path</code>
 
| A path within an NBT value, allowing for array and member accesses.
 
| None
 
|-
 
| <code>minecraft:objective</code>
 
| A scoreboard objective.
 
| None
 
|-
 
| <code>minecraft:objective_criteria</code>
 
| A single score criterion.
 
| None
 
|-
 
| <code>minecraft:operation</code>
 
| A scoreboard operator.
 
| None
 
|-
 
| <code>minecraft:particle</code>
 
| A particle effect (an identifier with extra information following it for specific particles, mirroring the [[#Particle|Particle]] packet)
 
| None
 
|-
 
| <code>minecraft:rotation</code>
 
| An angle, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified).  May use relative locations with <code>~</code>.
 
| None
 
|-
 
| <code>minecraft:scoreboard_slot</code>
 
| A scoreboard display position slot.  <code>list</code>, <code>sidebar</code>, <code>belowName</code>, and <code>sidebar.team.${color}</code> for all chat colors (<code>reset</code> is not included)
 
| None
 
|-
 
| <code>minecraft:score_holder</code>
 
| Something that can join a team.  Allows selectors and <code>*</code>.
 
| Has a single flags byte:
 
  {| class="wikitable"
 
  ! Bit mask
 
  ! Meaning
 
  |-
 
  | 0x01
 
  | If set, allows multiple.
 
  |}
 
|-
 
| <code>minecraft:swizzle</code>
 
| A collection of up to 3 axes.
 
| None
 
|-
 
| <code>minecraft:team</code>
 
| The name of a team.  Parsed as an unquoted string.
 
| None
 
|-
 
| <code>minecraft:item_slot</code>
 
| A name for an inventory slot.
 
| None
 
|-
 
| <code>minecraft:resource_location</code>
 
| An Identifier.
 
| None
 
|-
 
| <code>minecraft:mob_effect</code>
 
| A potion effect.
 
| None
 
|-
 
| <code>minecraft:function</code>
 
| A function.
 
| None
 
|-
 
| <code>minecraft:entity_anchor</code>
 
| The entity anchor related to the facing argument in the teleport command, is feet or eyes.
 
| None
 
|-
 
| <code>minecraft:range</code>
 
| A range of values with a min and a max.
 
|
 
  {| class="wikitable"
 
  ! Name
 
  ! Type
 
  ! Description
 
  |-
 
  | Decimals
 
  | Boolean
 
  | Whether decimal values are allowed.
 
  |}
 
|-
 
| <code>minecraft:item_enchantment</code>
 
| Represents a item enchantment.
 
| None
 
|}
 
 
 
Suggestion types:
 
 
 
{| class="wikitable"
 
  ! Identifier
 
  ! Description
 
  |-
 
  | <code>minecraft:ask_server</code>
 
  | Sends the <code>Tab-Complete</code> packet to the server to request tab completions.
 
  |-
 
  | <code>minecraft:all_recipes</code>
 
  | Suggests all the available recipes.
 
  |-
 
  | <code>minecraft:available_sounds</code>
 
  | Suggests all the available sounds.
 
  |-
 
  | <code>minecraft:summonable_entities</code>
 
  | Suggests all the summonable entities.
 
  |}
 
 
 
==== Named Sound Effect ====
 
{{See also|#Sound Effect}}
 
 
 
Used to play a sound effect on the client. Custom sounds may be added by resource packs.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x19|0x1A}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| Sound Name
 
| {{Change|String (256)|Identifier}}
 
| All sound effect names as of 1.12.2 can be seen [http://pokechu22.github.io/Burger/1.12.2.html#sounds here].
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Effect Position X
 
| Int
 
| Effect X multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Y
 
| Int
 
| Effect Y multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Effect Position Z
 
| Int
 
| Effect Z multiplied by 8 ([[Data types#Fixed-point numbers|fixed-point number]] with only 3 bits dedicated to the fractional part)
 
|-
 
| Volume
 
| Float
 
| 1 is 100%, can be more
 
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
|}
 
  
 
==== Chunk Data ====
 
==== Chunk Data ====
 
{{Main|Chunk Format}}
 
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
{{See also|#Unload Chunk}}
 +
 +
{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...  ([https://www.reddit.com/r/Mojira/comments/e5at6i/a_discussion_for_the_changes_to_how_biomes_are/ /r/mojira discussion] which notes that it seems to be some kind of interpolation, and 3D biomes are only used in the nether)}}
  
 
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
 
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
 
{{Change||Indexes into the global palette are still used, but since the global palette has changed, behavior is different.}}
 
 
The bits per block value used to index in the global palette is {{change|13|14}}, which is determined by taking the base 2 logarithm of the highest state ID and then rounding up (or alternatively, simply checking how many bits are needed to represent the highest state ID).
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,118: Line 478:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x20|0x21}}
+
  |rowspan="10"| {{change|0x21|0x22}}
  |rowspan="9"| Play
+
  |rowspan="10"| Play
  |rowspan="9"| Client
+
  |rowspan="10"| Client
 
  | Chunk X
 
  | Chunk X
 
  | Int
 
  | Int
Line 2,129: Line 489:
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | Ground-Up Continuous
+
  | Full chunk
 
  | Boolean
 
  | Boolean
  | See [[Chunk Format#Ground-up continuous|Chunk Format]]
+
  | See [[Chunk Format#Full chunk|Chunk Format]]
 
  |-
 
  |-
 
  | Primary Bit Mask
 
  | Primary Bit Mask
 
  | VarInt
 
  | VarInt
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
  |-  
+
|-
 +
| Heightmaps
 +
| [[NBT]]
 +
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 +
|- {{Added}}
 +
| Biomes
 +
| Optional array of Integer
 +
| 1024 biome IDs, ordered by x then z then d, in 4&times;4&times;4 blocks.  Not present if full chunk is false.
 +
  |-
 
  | Size
 
  | Size
 
  | VarInt
 
  | VarInt
Line 2,153: Line 521:
 
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
  |}
 
  |}
 +
 +
Note that the Notchian client requires an [[#Update View Position|Update View Position]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
 +
 +
{{Change||To get the biome at a coordinate, use <code>biomes[((y >> 2) & 63) << 4 {{!}} ((z >> 2) & 3) << 2 {{!}} ((x >> 2) & 3)]</code>}}
  
 
===== Data structure =====
 
===== Data structure =====
Line 2,166: Line 538:
 
  | Data
 
  | Data
 
  | Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
 
  | 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.
+
  | The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
  |-
+
  |- {{removed}}
 
  | Biomes
 
  | Biomes
  | Optional {{Change|Byte|Int}} Array
+
  | Optional Int Array
  | Only sent if Ground-Up Continuous is true; 256 {{change|bytes|entries}} if present
+
  | Only sent if full chunk is true; 256 entries if present
 
  |}
 
  |}
  
==== Spawn Particle ====
+
==== Particle ====
  
Displays the named particle
+
Displays the named particle.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,185: Line 557:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="11"| {{Change|0x22|0x23}}
+
  |rowspan="11"| {{Change|0x23|0x24}}
 
  |rowspan="11"| Play
 
  |rowspan="11"| Play
 
  |rowspan="11"| Client
 
  |rowspan="11"| Client
 
  | Particle ID
 
  | Particle ID
 
  | Int
 
  | Int
  | The particle ID listed in [[#Particle]].
+
  | The particle ID listed in [[#Particle|the particle data type]].
 
  |-
 
  |-
 
  | Long Distance
 
  | Long Distance
Line 2,197: Line 569:
 
  |-
 
  |-
 
  | X
 
  | X
  | Float
+
  | {{Change|Float|Double}}
 
  | X position of the particle
 
  | X position of the particle
 
  |-
 
  |-
 
  | Y
 
  | Y
  | Float
+
  | {{Change|Float|Double}}
 
  | Y position of the particle
 
  | Y position of the particle
 
  |-
 
  |-
 
  | Z
 
  | Z
  | Float
+
  | {{Change|Float|Double}}
 
  | Z position of the particle
 
  | Z position of the particle
 
  |-
 
  |-
Line 2,229: Line 601:
 
  |-
 
  |-
 
  | Data
 
  | Data
  | {{Change|Array of VarInt|Varies}}
+
  | Varies
  | {{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]]}}
+
  | The variable data listed in [[#Particle|the particle data type]].
 
  |}
 
  |}
  
==== Map ====
+
==== Join Game ====
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
See [[Protocol Encryption]] for information on logging in.
 
 
{{Warning|Map icons with types over 15 currently don't work on servers (see [https://bugs.mojang.com/browse/MC-126815 MC-126815]).}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="15"| {{Change|0x24|0x25}}
 
|rowspan="15"| Play
 
|rowspan="15"| Client
 
|colspan="2"| Item Damage
 
|colspan="2"| VarInt
 
| The damage value (map ID) of the map being modified
 
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|-
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="5"| Icon
 
| Direction And Type
 
|rowspan="5"| Array
 
| Byte
 
| 0xF0 = Type, 0x0F = Direction
 
|-
 
| X
 
| Byte
 
|
 
|-
 
| Z
 
| Byte
 
|
 
|- style="background-color: #d9ead3;"
 
| Has Display Name
 
| Boolean
 
|
 
|- style="background-color: #d9ead3;"
 
| Display Name
 
| Optional [[Chat]]
 
| Only present if previous Boolean is true
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
|-
 
|colspan="2"| Rows
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; number of rows updated
 
|-
 
|colspan="2"| X
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; x offset of the westernmost column
 
|-
 
|colspan="2"| Z
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; z offset of the northernmost row
 
|-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
| Only if Columns is more than 0; length of the following array
 
|-
 
|colspan="2"| Data
 
|colspan="2"| Optional Array of Unsigned Byte
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
|}
 
 
 
For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
 
 
 
Types are based off of rows and columns in <code>map_icons.png</code>:
 
 
 
{| class="wikitable"
 
|-
 
! Icon type
 
! Result
 
|-
 
| 0
 
| White arrow (players)
 
|-
 
| 1
 
| Green arrow (item frames)
 
|-
 
| 2
 
| Red arrow
 
|-
 
| 3
 
| Blue arrow
 
|-
 
| 4
 
| White cross
 
|-
 
| 5
 
| Red pointer
 
|-
 
| 6
 
| White circle (off-map players)
 
|-
 
| 7
 
| Small white circle (far-off-map players)
 
|-
 
| 8
 
| Mansion
 
|-
 
| 9
 
| Temple
 
|- style="background-color: #d9ead3;"
 
| 10
 
| White Banner
 
|- style="background-color: #d9ead3;"
 
| 11
 
| Orange Banner
 
|- style="background-color: #d9ead3;"
 
| 12
 
| Magenta Banner
 
|- style="background-color: #d9ead3;"
 
| 13
 
| Light Blue Banner
 
|- style="background-color: #d9ead3;"
 
| 14
 
| Yellow Banner
 
|- style="background-color: #d9ead3;"
 
| 15
 
| Lime Banner
 
|- style="background-color: #d9ead3;"
 
| 16
 
| Pink Banner
 
|- style="background-color: #d9ead3;"
 
| 17
 
| Gray Banner
 
|- style="background-color: #d9ead3;"
 
| 18
 
| Light Gray Banner
 
|- style="background-color: #d9ead3;"
 
| 19
 
| Cyan Banner
 
|- style="background-color: #d9ead3;"
 
| 20
 
| Purple Banner
 
|- style="background-color: #d9ead3;"
 
| 21
 
| Blue Banner
 
|- style="background-color: #d9ead3;"
 
| 22
 
| Brown Banner
 
|- style="background-color: #d9ead3;"
 
| 23
 
| Green Banner
 
|- style="background-color: #d9ead3;"
 
| 24
 
| Red Banner
 
|- style="background-color: #d9ead3;"
 
| 25
 
| Black Banner
 
|- style="background-color: #d9ead3;"
 
| 26
 
| Treasure marker
 
|}
 
 
 
==== Craft Recipe Response ====
 
 
 
Response to the serverbound packet ([[#Craft Recipe Request|Craft Recipe Request]]), with the same recipe ID.  Appears to be used to notify the UI.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,416: Line 617:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| {{Change|0x2B|0x2C}}
+
  |rowspan="9"| {{change|0x25|0x26}}
  |rowspan="2"| Play
+
  |rowspan="9"| Play
  |rowspan="2"| Client
+
  |rowspan="9"| Client
  | Window ID
+
  | Entity ID
  | Byte
+
  | Int
  |
+
  | The player's Entity ID (EID)
 
  |-
 
  |-
  | Recipe
+
  | Gamemode
  | {{Change|VarInt|Identifer}}
+
  | Unsigned Byte
  | A recipe ID
+
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
|}
 
 
 
==== Face Player ====
 
 
 
Used to rotate the client player to face the given location or entity (for <code>/teleport [<targets>] <x> <y> <z> facing</code>).
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="8"| 0x30
+
  | Dimension
  |rowspan="8"| Play
+
| Int Enum
  |rowspan="8"| Client
+
| -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
 +
|- {{Added}}
 +
  | Hashed seed
 +
| Long
 +
  | First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
  | Feet/eyes
+
  | Max Players
  | VarInt enum
+
  | Unsigned Byte
  | Values are feet=0, eyes=1.  If set to eyes, aims using the head position; otherwise aims using the feet position.
+
  | Was once used by the client to draw the player list, but now is ignored
|-
 
| Target x
 
| Double
 
| x coordinate of the point to face towards
 
|-
 
| Target y
 
| Double
 
| y coordinate of the point to face towards
 
|-
 
| Target z
 
| Double
 
| z coordinate of the point to face towards
 
|-
 
| Is entity
 
| Boolean
 
| If true, additional information about an entity is provided.
 
 
  |-
 
  |-
  | Entity ID
+
  | Level Type
  | Optional VarInt
+
  | String Enum (16)
  | Only if is entity is true &mdash; the entity to face towards
+
  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
 
  |-
 
  |-
  | Entity feet/eyes
+
  | View Distance
| Optional VarInt enum
 
| Whether to look at the entity's eyes or feet.  Same values and meanings as before, just for the entity's head/feet.
 
|}
 
 
 
If the entity given by entity ID cannot be found, this packet should be treated as if is entity was false.
 
 
 
==== Unlock Recipes ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="10"| {{Change|0x31|0x33}}
 
|rowspan="10"| Play
 
|rowspan="10"| Client
 
|-
 
| Action
 
 
  | VarInt
 
  | VarInt
  | 0: init, 1: add, 2: remove
+
  | Render distance (2-32)
 
  |-
 
  |-
  | Crafting Recipe Book Open
+
  | Reduced Debug Info
 
  | Boolean
 
  | Boolean
  | If true, then the crafting recipe book will be open when the player opens its inventory.
+
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
  |-
+
  |- {{Added}}
  | Crafting Recipe Book Filter Active
+
  | Unknown
 
  | Boolean
 
  | Boolean
  | If true, then the filtering option is active when the players opens its inventory.
+
  | Added
|-
 
| Smelting Recipe Book Open
 
| Boolean
 
| If true, then the smelting recipe book will be open when the player opens its inventory.
 
|-
 
| Smelting Recipe Book Filter Active
 
| Boolean
 
| If true, then the filtering option is active when the players opens its inventory.
 
|-
 
| Array size 1
 
| VarInt
 
| 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 ====
+
==== Respawn ====
  
This is sent to the client when it should create a new {{Minecraft Wiki|scoreboard}} objective or remove one.
+
To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 2,542: Line 669:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x42|0x44}}
+
  |rowspan="4"| {{change|0x3A|0x3B}}
 
  |rowspan="4"| Play
 
  |rowspan="4"| Play
 
  |rowspan="4"| Client
 
  |rowspan="4"| Client
  | Objective Name
+
  | Dimension
  | String (16)
+
  | Int Enum
  | An unique name for the objective
+
  | -1: The Nether, 0: The Overworld, 1: The End
 +
|- {{Added}}
 +
| Hashed seed
 +
| Long
 +
| First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
  | Mode
+
  | Gamemode
  | Byte
+
  | Unsigned Byte
  | 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text.
+
  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
|-
 
| Objective Value
 
| Optional String (32)
 
| Only if mode is 0 or 2. The text to be displayed for the score
 
|-
 
| Type
 
| Optional {{change|String|VarInt Enum}}
 
| 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="23"| {{Change|0x44|0x46}}
 
|rowspan="23"| Play
 
|rowspan="23"| Client
 
|colspan="2"| Team Name
 
| String (16)
 
| A unique name for the team. (Shared with scoreboard).
 
|-
 
|colspan="2"| Mode
 
| Byte
 
| Determines the layout of the remaining packet
 
 
  |-
 
  |-
  |rowspan="9"| 0: create team
+
  | Level Type
| 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.}}
 
|-
 
| 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="7"| 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)
 
  | String (16)
  | Displayed after the names of entities that are part of this team
+
  | Same as [[#Join Game|Join Game]]
|-
 
| 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.}}
 
|-
 
|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.
+
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
  
{| class="wikitable"
+
If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
! 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"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| 0x4B
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| Flags
 
| Byte
 
| Controls which fields are present.
 
|-
 
| Source
 
| Optional VarInt enum
 
| Only if flags is 3 or 1 (bit mask 0x1).  See below.  If not present, then sounds from all sources are cleared.
 
|-
 
| Sound
 
| Optional Identifier
 
| Only if flags is 2 or 3 (bit mask 0x2).  A sound effect name, see [[#Named Sound Effect|Named Sound Effect]].  If not present, then all sounds are cleared.
 
|}
 
 
 
Categories:
 
 
 
{| 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"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x53
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
|colspan="2"| Num Recipes
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|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
 
|}
 
 
 
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 ====
 
 
 
{{Warning|This packet MUST be send TWICE, even if it's empty, not doing so can crash the client (e.g. when clicking a fuel slot in a furnace). The packet should also be send two times, this is to prevent the client from crashing.}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x54
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Block Tags
 
| (See below)
 
| IDs are block IDs
 
|-
 
| Item Tags
 
| (See below)
 
| IDs are item IDs
 
|}
 
 
 
Tags look like:
 
 
 
{| class="wikitable"
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|colspan="2"| Length
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="3"| Tags
 
| Tag name
 
|rowspan="3"| Array
 
| Identifier
 
|
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Entries
 
| Array of VarInt
 
| Numeric ID of the block/item.
 
|}
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Tab-Complete (serverbound) ====
+
No changes so far.
 
 
Sent when the client needs to tab-complete a <code>minecraft:ask_server</code> suggestion type.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x01|0x04}}
 
|rowspan="5"| Play
 
|rowspan="5"| Server
 
|style="background-color: #d9ead3;"| Transaction Id
 
|style="background-color: #d9ead3;"| VarInt
 
|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.
 
|-
 
| Text
 
| 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
 
|
 
|-
 
| Recipe
 
| {{Change|VarInt|Identifier}}
 
| A recipe ID
 
|-
 
| Make all
 
| Boolean
 
| Affects the amount of items processed; true if shift is down when clicked
 
|}
 
 
 
==== 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
 
|rowspan="7"| Play
 
|rowspan="7"| Server
 
|colspan="2"| Type
 
| VarInt
 
| Determines the format of the rest of the packet
 
|-
 
! Type
 
! Field Name
 
!
 
!
 
|-
 
| 0: Displayed Recipe
 
| Recipe ID
 
| Int
 
| The internal id of the displayed recipe.
 
|-
 
|rowspan="4"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
| Boolean
 
| Whether the player has the crafting recipe book currently openened/active.
 
|-
 
| 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.
 
  
 
== Handshaking ==
 
== Handshaking ==
Line 3,108: Line 722:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|340|371}})
+
  | See [[protocol version numbers]] (currently {{change|498|571}})
 
  |-
 
  |-
 
  | 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 16:02, 6 December 2019

This page documents the changes from the last stable Minecraft release (currently 1.14.4, protocol 498) to the current pre-release (currently 1.15-pre6, protocol 571). 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
Handshaking serverbound
0x00 Handshake Current Pre
Play clientbound
0x03 Spawn Mob Current Pre
0x05 Spawn Player Current Pre
0x5C 0x08 Acknowledge Player Digging Current (unchanged)
0x08 0x09 Block Break Animation Current (unchanged)
0x09 0x0A Update Block Entity Current Pre
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 Multi Block Change Current (unchanged)
0x10 0x11 Tab-Complete (clientbound) Current (unchanged)
0x11 0x12 Declare Commands Current (unchanged)
0x12 0x13 Confirm Transaction (clientbound) Current (unchanged)
0x13 0x14 Close Window (clientbound) Current (unchanged)
0x14 0x15 Window Items Current (unchanged)
0x15 0x16 Window Property Current (unchanged)
0x16 0x17 Set Slot Current (unchanged)
0x17 0x18 Set Cooldown Current (unchanged)
0x18 0x19 Plugin Message (clientbound) Current (unchanged)
0x19 0x1A Named Sound Effect Current (unchanged)
0x1A 0x1B Disconnect (play) Current (unchanged)
0x1B 0x1C Entity Status Current (unchanged)
0x1C 0x1D Explosion Current (unchanged)
0x1D 0x1E Unload Chunk Current (unchanged)
0x1E 0x1F Change Game State Current (unchanged)
0x1F 0x20 Open Horse Window Current (unchanged)
0x20 0x21 Keep Alive (clientbound) Current (unchanged)
0x21 0x22 Chunk Data Current Pre
0x22 0x23 Effect Current (unchanged)
0x23 0x24 Particle Current Pre
0x24 0x25 Update Light Current (unchanged)
0x25 0x26 Join Game Current Pre
0x26 0x27 Map Data Current (unchanged)
0x27 0x28 Trade List Current (unchanged)
0x28 0x29 Entity Relative Move Current (unchanged)
0x29 0x2A Entity Look And Relative Move Current (unchanged)
0x2A 0x2B Entity Look Current (unchanged)
0x2B 0x2C Entity Current (unchanged)
0x2C 0x2D Vehicle Move (clientbound) Current (unchanged)
0x2D 0x2E Open Book Current (unchanged)
0x2E 0x2F Open Window Current (unchanged)
0x2F 0x30 Open Sign Editor Current (unchanged)
0x30 0x31 Craft Recipe Response Current (unchanged)
0x31 0x32 Player Abilities (clientbound) Current (unchanged)
0x32 0x33 Combat Event Current (unchanged)
0x33 0x34 Player Info Current (unchanged)
0x34 0x35 Face Player Current (unchanged)
0x35 0x36 Player Position And Look (clientbound) Current (unchanged)
0x36 0x37 Unlock Recipes Current (unchanged)
0x37 0x38 Destroy Entities Current (unchanged)
0x38 0x39 Remove Entity Effect Current (unchanged)
0x39 0x3A Resource Pack Send Current (unchanged)
0x3A 0x3B Respawn Current Pre
0x3B 0x3C Entity Head Look 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 Display Scoreboard Current (unchanged)
0x43 0x44 Entity Metadata Current (unchanged)
0x44 0x45 Attach Entity Current (unchanged)
0x45 0x46 Entity Velocity Current (unchanged)
0x46 0x47 Entity Equipment Current (unchanged)
0x47 0x48 Set Experience Current (unchanged)
0x48 0x49 Update Health Current (unchanged)
0x49 0x4A Scoreboard Objective Current (unchanged)
0x4A 0x4B Set Passengers Current (unchanged)
0x4B 0x4C Teams Current (unchanged)
0x4C 0x4D Update Score Current (unchanged)
0x4D 0x4E Spawn Position 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 (unchanged)

New/modified data types

No changes so far.

Entity Metadata

Warning.png Lots of shifts, of course

Living

Extends Entity.

Index Type Meaning Default
7 Byte Hand states, used to trigger blocking/eating/drinking animation. 0
Bit mask Meaning
0x01 Is hand active
0x02 Active hand (0 = main hand, 1 = offhand)
0x04 In riptide spin attack
8 Float Health 1.0
9 VarInt Potion effect color (or 0 if there is no effect) 0
10 Boolean Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount false
11 VarInt Number of arrows in entity 0
12 VarInt Unknown 0
12 13 OptBlockPos Unknown (Bed location?) Absent

Bee

Extends Insentient.

Index Type Meaning Default
16 Byte Unknown 0
17 VarInt Unknown 0

Wolf

Extends TameableAnimal.

Index Type Meaning Default
17 18 Float Damage taken (used for tail rotation) Value of health field (1.0)
18 Boolean Is begging false
19 VarInt Collar color (values are those used with dyes) 14 (Red)

Enderman

Extends Monster.

Index Type Meaning Default
15 Opt BlockID Carried block Absent
16 Boolean Is screaming false
17 Boolean Unknown false

Trident

Extends Arrow.

Index Type Meaning Default
10 VarInt Loyalty level (enchantment) 0
11 Boolean Unknown False


Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Spawn Mob

Sent by the server when a mob entity is spawned.

Packet ID State Bound To Field Name Field Type Notes
0x03 Play Client Entity ID VarInt
Entity UUID UUID
Type VarInt The type of mob. See Entities#Mobs
X Double
Y Double
Z Double
Yaw Angle
Pitch Angle
Head Pitch Angle
Velocity X Short Same units as Entity Velocity
Velocity Y Short Same units as Entity Velocity
Velocity Z Short Same units as Entity Velocity
Metadata Entity Metadata

Spawn Player

This packet is sent by the server when a player comes into visible range, not when a player joins.

This packet must be sent after the Player Info packet that adds the player data for the client to use when spawning a player. If the Player Info for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player Info packet includes skin/cape data.

Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.

Packet ID State Bound To Field Name Field Type Notes
0x05 Play Client Entity ID VarInt Player's EID
Player UUID UUID See below for notes on offline mode and NPCs
X Double
Y Double
Z Double
Yaw Angle
Pitch Angle
Metadata Entity Metadata

When in online mode, the UUIDs must be valid and have valid skin blobs.

In offline mode, UUID v3 is used with the String OfflinePlayer:<player name>, encoded in UTF-8 (and case-sensitive).

For NPCs UUID v2 should be used. Note:

<+Grum> i will never confirm this as a feature you know that :)

In an example UUID, xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx, the UUID version is specified by Y. So, for UUID v3, Y will always be 3, and for UUID v2, Y will always be 2.

Update Block Entity

Sets the block entity associated with the block at the given location.

Packet ID State Bound To Field Name Field Type Notes
0x09 0x0A Play Client Location Position
Action Unsigned Byte The type of update to perform, see below
NBT Data NBT Tag Data to set. May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)

Action field:

  • 1: Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
  • 2: Set command block text (command and last execution status)
  • 3: Set the level, primary, and secondary powers of a beacon
  • 4: Set rotation and skin of mob head
  • 5: Declare a conduit
  • 6: Set base color and patterns on a banner
  • 7: Set the data for a Structure tile entity
  • 8: Set the destination for a end gateway
  • 9: Set the text on a sign
  • 10: Unused
  • 11: Declare a bed
  • 12: Set data of a jigsaw block
  • 13: Set items in a campfire
  • 14: Beehive information

Chunk Data

Main article: Chunk Format
See also: #Unload Chunk
Huh.png The following information needs to be added to this page:
How do biomes work now? The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed... (/r/mojira discussion which notes that it seems to be some kind of interpolation, and 3D biomes are only used in the nether)

The server only sends skylight information for chunk pillars in the Overworld, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent. This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with Update Block Entity later).

Packet ID State Bound To Field Name Field Type Notes
0x21 0x22 Play Client Chunk X Int Chunk coordinate (block coordinate divided by 16, rounded down)
Chunk Z Int Chunk coordinate (block coordinate divided by 16, rounded down)
Full chunk Boolean See Chunk Format
Primary Bit Mask VarInt Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
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 Optional array of Integer 1024 biome IDs, ordered by x then z then d, in 4×4×4 blocks. Not present if full chunk is false.
Size VarInt Size of Data in bytes
Data Byte array See data structure in Chunk Format
Number of block entities VarInt Number of elements in the following array
Block entities Array of NBT Tag All block entities in the chunk. Use the x, y, and z tags in the NBT to determine their positions.

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

To get the biome at a coordinate, use biomes[((y >> 2) & 63) << 4 | ((z >> 2) & 3) << 2 | ((x >> 2) & 3)]

Data structure

The data section of the packet contains most of the useful data for the chunk.

Field Name Field Type Notes
Data Array of Chunk Section The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
Biomes Optional Int Array Only sent if full chunk is true; 256 entries if present

Particle

Displays the named particle.

Packet ID State Bound To Field Name Field Type Notes
0x23 0x24 Play Client Particle ID Int The particle ID listed in the particle data type.
Long Distance Boolean If true, particle distance increases from 256 to 65536
X Float Double X position of the particle
Y Float Double Y position of the particle
Z Float Double Z position of the particle
Offset X Float This is added to the X position after being multiplied by random.nextGaussian()
Offset Y Float This is added to the Y position after being multiplied by random.nextGaussian()
Offset Z 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 Varies The variable data listed in the particle data type.

Join Game

See Protocol Encryption for information on logging in.

Packet ID State Bound To Field Name Field Type Notes
0x25 0x26 Play Client Entity ID Int The player's Entity ID (EID)
Gamemode Unsigned Byte 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
Dimension Int Enum -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed.
Max Players Unsigned Byte Was once used by the client to draw the player list, but now is ignored
Level Type String Enum (16) default, flat, largeBiomes, amplified, customized, buffet, default_1_1
View Distance VarInt Render distance (2-32)
Reduced Debug Info Boolean If true, a Notchian client shows reduced information on the debug screen. For servers in development, this should almost always be false.
Unknown Boolean Added

Respawn

To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.

Packet ID State Bound To Field Name Field Type Notes
0x3A 0x3B Play Client Dimension Int Enum -1: The Nether, 0: The Overworld, 1: The End
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed.
Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
Level Type String (16) Same as Join Game

Warning.png Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).

If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.

Serverbound

No changes so far.

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 498 571)
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.