Difference between revisions of "Pre-release protocol"

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(1.14-pre5)
(1.15 release, no changes. All that's left to investigate is the chunk format change, and then everything should be good to go)
 
(87 intermediate revisions by 8 users not shown)
Line 1: Line 1:
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.13.2, protocol 404]]) to the current pre-release (currently [[Protocol version numbers|1.14-pre5, protocol 476]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.14.4, protocol 498]]) to the current pre-release (currently [[Protocol version numbers|1.15, protocol 573]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
==== Position ====
+
No changes so far.
 
 
64-bit value split in to three parts
 
 
 
* x: 26 MSBs
 
* z: 26 {{change|LSBs|middle bits}}
 
* y: 12 {{change|bits between them|LSBs}}
 
 
 
Encoded as followed:
 
 
 
((x & 0x3FFFFFF) << 38) | {{change|((y & 0xFFF) << 26) {{!}} (z & 0x3FFFFFF)|((z & 0x3FFFFFF) << 12) {{!}} (y & 0xFFF)}}
 
 
 
And decoded as:
 
 
 
val = read_unsigned_long();
 
x = val >> 38;
 
y = {{change|(val >> 26) & 0xFFF|val & 0xFFF}};
 
z = {{change|val << 38 >> 38|(val << 38 >> 38) >> 12}};
 
 
 
Note: The details of bit shifting are rather language dependent; the above may work in Java but probably won't in other languages without some tweaking. In particular, you will usually receive positive numbers even if the actual coordinates are negative. This can be fixed by adding something like the following:
 
 
 
if x >= 2^25 { x -= 2^26 }
 
if y >= 2^11 { y -= 2^12 }
 
if z >= 2^25 { z -= 2^26 }
 
  
 
=== Packets ===
 
=== Packets ===
Line 45: Line 22:
 
  |-
 
  |-
 
!colspan="4"| Play clientbound
 
!colspan="4"| Play clientbound
{{PacketList|0x00|Spawn Object}}
+
{{PacketList|0x03|Spawn Mob}}
{{PacketList|0x01|Spawn Experience Orb|pre=unchanged}}
+
{{PacketList|0x05|Spawn Player}}
{{PacketList|0x02|Spawn Global Entity|pre=unchanged}}
+
{{PacketList|{{change|0x5C|0x08}}|Acknowledge Player Digging|pre=unchanged}}
{{PacketList|0x03|Spawn Mob|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
{{PacketList|0x04|Spawn Painting|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x0A}}|Update Block Entity}}
{{PacketList|0x05|Spawn Player|pre=unchanged}}
+
{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
{{PacketList|0x06|Animation (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
{{PacketList|0x07|Statistics|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
{{PacketList|0x08|Block Break Animation|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
{{PacketList|0x0A|Block Action|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x10}}|Multi Block Change|pre=unchanged}}
{{PacketList|0x0B|Block Change|pre=unchanged}}
+
{{PacketList|{{change|0x10|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
{{PacketList|0x0C|Boss Bar|pre=unchanged}}
+
{{PacketList|{{change|0x11|0x12}}|Declare Commands|pre=unchanged}}
{{PacketList|0x0D|Server Difficulty}}
+
{{PacketList|{{change|0x12|0x13}}|Confirm Transaction (clientbound)|pre=unchanged}}
{{PacketList|0x0E|Chat Message (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x13|0x14}}|Close Window (clientbound)|pre=unchanged}}
{{PacketList|0x0F|Multi Block Change|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
{{PacketList|0x10|Tab-Complete (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
{{PacketList|0x11|Declare Commands|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Set Slot|pre=unchanged}}
{{PacketList|0x12|Confirm Transaction (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
{{PacketList|0x13|Close Window (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x15|0x14}}|Window Items|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x16|0x15}}|Window Property|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
{{PacketList|{{change|0x17|0x16}}|Set Slot|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
{{PacketList|{{change|0x18|0x17}}|Set Cooldown|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1D}}|Explosion|pre=unchanged}}
{{PacketList|{{change|0x19|0x18}}|Plugin Message (clientbound)}}
+
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
{{PacketList|{{change|0x1A|0x19}}|Named Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1A}}|Disconnect (play)|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x20}}|Open Horse Window|pre=unchanged}}
{{PacketList|{{change|0x1C|0x1B}}|Entity Status|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x1E|0x1C}}|Explosion|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x22}}|Chunk Data}}
{{PacketList|{{change|0x1F|0x1D}}|Unload Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x23}}|Effect|pre=unchanged}}
{{PacketList|{{change|0x20|0x1E}}|Change Game State|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x24}}|Particle}}
{{PacketList|0x1F|Open Horse Window}}
+
{{PacketList|{{change|0x24|0x25}}|Update Light|pre=unchanged}}
{{PacketList|{{change|0x21|0x20}}|Keep Alive (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x26}}|Join Game}}
{{PacketList|{{change|0x22|0x21}}|Chunk Data}}
+
{{PacketList|{{change|0x26|0x27}}|Map Data|pre=unchanged}}
{{PacketList|{{change|0x23|0x22}}|Effect|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x28}}|Trade List|pre=unchanged}}
{{PacketList|{{change|0x24|0x23}}|Particle|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x29}}|Entity Relative Move|pre=unchanged}}
{{PacketList|0x24|Update Light}}
+
{{PacketList|{{change|0x29|0x2A}}|Entity Look And Relative Move|pre=unchanged}}
{{PacketList|0x25|Join Game}}
+
{{PacketList|{{change|0x2A|0x2B}}|Entity Look|pre=unchanged}}
{{PacketList|0x26|Map Data}}
+
{{PacketList|{{change|0x2B|0x2C}}|Entity|pre=unchanged}}
{{PacketList|0x27|Trade List}}
+
{{PacketList|{{change|0x2C|0x2D}}|Vehicle Move (clientbound)|pre=unchanged}}
{{PacketList|0x28|Entity Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2E}}|Open Book|pre=unchanged}}
{{PacketList|0x29|Entity Look And Relative Move|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x2F}}|Open Window|pre=unchanged}}
{{PacketList|0x2A|Entity Look|pre=unchanged}}
+
{{PacketList|{{change|0x2F|0x30}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x27|0x2B}}|Entity|pre=unchanged}}
+
{{PacketList|{{change|0x30|0x31}}|Craft Recipe Response|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x31|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
{{PacketList|0x2D|Open Book}}
+
{{PacketList|{{change|0x32|0x33}}|Combat Event|pre=unchanged}}
{{PacketList|{{change|0x14|0x2E}}|Open Window}}
+
{{PacketList|{{change|0x33|0x34}}|Player Info|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2F}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x35}}|Face Player|pre=unchanged}}
{{PacketList|{{change|0x2D|0x30}}|Craft Recipe Response|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x36}}|Player Position And Look (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x2E|0x31}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x36|0x37}}|Unlock Recipes|pre=unchanged}}
{{PacketList|{{change|0x2F|0x32}}|Combat Event|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x38}}|Destroy Entities|pre=unchanged}}
{{PacketList|{{change|0x33}}|Use Bed|pre=removed}}
+
{{PacketList|{{change|0x38|0x39}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x30|0x33}}|Player Info|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x3A}}|Resource Pack Send|pre=unchanged}}
{{PacketList|{{change|0x31|0x34}}|Face Player|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x3B}}|Respawn}}
{{PacketList|{{change|0x32|0x35}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x3C}}|Entity Head Look|pre=unchanged}}
{{PacketList|{{change|0x34|0x36}}|Unlock Recipes|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x3D}}|Select Advancement Tab|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Destroy Entities|pre=unchanged}}
+
{{PacketList|{{change|0x3D|0x3E}}|World Border|pre=unchanged}}
{{PacketList|{{change|0x36|0x38}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x3E|0x3F}}|Camera|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Resource Pack Send|pre=unchanged}}
+
{{PacketList|{{change|0x3F|0x40}}|Held Item Change (clientbound)|pre=unchanged}}
{{PacketList|{{change|0x38|0x3A}}|Respawn}}
+
{{PacketList|{{change|0x40|0x41}}|Update View Position|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Entity Head Look|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x42}}|Update View Distance|pre=unchanged}}
{{PacketList|{{change|0x3A|0x3C}}|Select Advancement Tab|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x43}}|Display Scoreboard|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|World Border|pre=unchanged}}
+
{{PacketList|{{change|0x43|0x44}}|Entity Metadata|pre=unchanged}}
{{PacketList|{{change|0x3C|0x3E}}|Camera|pre=unchanged}}
+
{{PacketList|{{change|0x44|0x45}}|Attach Entity|pre=unchanged}}
{{PacketList|{{change|0x3D|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x45|0x46}}|Entity Velocity|pre=unchanged}}
{{PacketList|0x40|Update View Position|rel=added}}
+
{{PacketList|{{change|0x46|0x47}}|Entity Equipment|pre=unchanged}}
{{PacketList|0x41|Update View Distance|rel=added}}
+
{{PacketList|{{change|0x47|0x48}}|Set Experience|pre=unchanged}}
{{PacketList|{{change|0x3E|0x42}}|Display Scoreboard|pre=unchanged}}
+
{{PacketList|{{change|0x48|0x49}}|Update Health|pre=unchanged}}
{{PacketList|{{change|0x3F|0x43}}|Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x49|0x4A}}|Scoreboard Objective|pre=unchanged}}
{{PacketList|{{change|0x40|0x44}}|Attach Entity|pre=unchanged}}
+
{{PacketList|{{change|0x4A|0x4B}}|Set Passengers|pre=unchanged}}
{{PacketList|{{change|0x41|0x45}}|Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x4B|0x4C}}|Teams|pre=unchanged}}
{{PacketList|{{change|0x42|0x46}}|Entity Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x4C|0x4D}}|Update Score|pre=unchanged}}
{{PacketList|{{change|0x43|0x47}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x4D|0x4E}}|Spawn Position|pre=unchanged}}
{{PacketList|{{change|0x44|0x48}}|Update Health|pre=unchanged}}
+
{{PacketList|{{change|0x4E|0x4F}}|Time Update|pre=unchanged}}
{{PacketList|{{change|0x45|0x49}}|Scoreboard Objective|pre=unchanged}}
+
{{PacketList|{{change|0x4F|0x50}}|Title|pre=unchanged}}
{{PacketList|{{change|0x46|0x4A}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x50|0x51}}|Entity Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x47|0x4B}}|Teams|pre=unchanged}}
+
{{PacketList|{{change|0x51|0x52}}|Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x48|0x4C}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x52|0x53}}|Stop Sound|pre=unchanged}}
{{PacketList|{{change|0x49|0x4D}}|Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x53|0x54}}|Player List Header And Footer|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4E}}|Time Update|pre=unchanged}}
+
{{PacketList|{{change|0x54|0x55}}|NBT Query Response|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4F}}|Title|pre=unchanged}}
+
{{PacketList|{{change|0x55|0x56}}|Collect Item|pre=unchanged}}
{{PacketList|0x50|Entity Sound Effect}}
+
{{PacketList|{{change|0x56|0x57}}|Entity Teleport|pre=unchanged}}
{{PacketList|{{change|0x4D|0x51}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x57|0x58}}|Advancements|pre=unchanged}}
{{PacketList|{{change|0x4C|0x52}}|Stop Sound|pre=unchanged}}
+
{{PacketList|{{change|0x58|0x59}}|Entity Properties|pre=unchanged}}
{{PacketList|{{change|0x4E|0x53}}|Player List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x59|0x5A}}|Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x1D|0x54}}|NBT Query Response|pre=unchanged}}
+
{{PacketList|{{change|0x5A|0x5B}}|Declare Recipes|pre=unchanged}}
{{PacketList|{{change|0x4F|0x55}}|Collect Item|pre=unchanged}}
+
{{PacketList|{{change|0x5B|0x5C}}|Tags|pre=unchanged}}
{{PacketList|{{change|0x50|0x56}}|Entity Teleport|pre=unchanged}}
 
{{PacketList|{{change|0x51|0x57}}|Advancements|pre=unchanged}}
 
{{PacketList|{{change|0x52|0x58}}|Entity Properties|pre=unchanged}}
 
{{PacketList|{{change|0x53|0x59}}|Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x54|0x5A}}|Declare Recipes}}
 
{{PacketList|{{change|0x55|0x5B}}|Tags}}
 
|-
 
!colspan="4"| Play serverbound
 
{{PacketList|0x00|Teleport Confirm|pre=unchanged}}
 
{{PacketList|0x01|Query Block NBT|pre=unchanged}}
 
{{PacketList|0x02|Set Difficulty}}
 
{{PacketList|{{change|0x02|0x03}}|Chat Message (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x03|0x04}}|Client Status|pre=unchanged}}
 
{{PacketList|{{change|0x04|0x05}}|Client Settings|pre=unchanged}}
 
{{PacketList|{{change|0x05|0x06}}|Tab-Complete (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x06|0x07}}|Confirm Transaction (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x07|0x08}}|Enchant Item|pre=unchanged}}
 
{{PacketList|{{change|0x08|0x09}}|Click Window|pre=unchanged}}
 
{{PacketList|{{change|0x09|0x0A}}|Close Window (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0A|0x0B}}|Plugin Message (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0B|0x0C}}|Edit Book|pre=unchanged}}
 
{{PacketList|{{change|0x0C|0x0D}}|Query Entity NBT|pre=unchanged}}
 
{{PacketList|{{change|0x0D|0x0E}}|Use Entity|pre=unchanged}}
 
{{PacketList|{{change|0x0E|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
 
{{PacketList|0x10|Lock Difficulty}}
 
{{PacketList|{{change|0x10|0x11}}|Player Position|pre=unchanged}}
 
{{PacketList|{{change|0x11|0x12}}|Player Position And Look (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x12|0x13}}|Player Look|pre=unchanged}}
 
{{PacketList|{{change|0x0F|0x14}}|Player|pre=unchanged}}
 
{{PacketList|{{change|0x13|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x16}}|Steer Boat|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x17}}|Pick Item|pre=unchanged}}
 
{{PacketList|{{change|0x16|0x18}}|Craft Recipe Request|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x1A}}|Player Digging|pre=unchanged}}
 
{{PacketList|{{change|0x19|0x1B}}|Entity Action|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x1C}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1D}}|Recipe Book Data}}
 
{{PacketList|{{change|0x1C|0x1E}}|Name Item|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x1F}}|Resource Pack Status|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x20}}|Advancement Tab|pre=unchanged}}
 
{{PacketList|{{change|0x1F|0x21}}|Select Trade|pre=unchanged}}
 
{{PacketList|{{change|0x20|0x22}}|Set Beacon Effect|pre=unchanged}}
 
{{PacketList|{{change|0x21|0x23}}|Held Item Change (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x22|0x24}}|Update Command Block|pre=unchanged}}
 
{{PacketList|{{change|0x23|0x25}}|Update Command Block Minecart|pre=unchanged}}
 
{{PacketList|{{change|0x24|0x26}}|Creative Inventory Action|pre=unchanged}}
 
{{PacketList|0x27|Update Jigsaw Block|rel=added}}
 
{{PacketList|{{change|0x25|0x28}}|Update Structure Block|pre=unchanged}}
 
{{PacketList|{{change|0x26|0x29}}|Update Sign|pre=unchanged}}
 
{{PacketList|{{change|0x27|0x2A}}|Animation (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x28|0x2B}}|Spectate|pre=unchanged}}
 
{{PacketList|{{change|0x29|0x2C}}|Player Block Placement}}
 
{{PacketList|{{change|0x2A|0x2D}}|Use Item|pre=unchanged}}
 
 
  |}
 
  |}
  
Line 194: Line 117:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
{{Warning2|Entity metadata shifted in 19w08a; not all entities are copied here.  All subclasses of entity had shift of 1; all subclasses of living had a second shift (2 total).  All entities listed in the article have been updated, but there are ones not listed here. }}
+
{{warning2|Lots of shifts, of course}}
 
 
=== 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 VarInt Enum
 
| Only if Index is not <code>0xff</code>; the type of the index, see the table below
 
|-
 
| Value
 
| Optional ''value of Type''
 
| Only if Index is not <code>0xff</code>: the value of the metadata field
 
|}
 
 
 
{| class="wikitable"
 
! Value of Type field
 
! [[Data types|Type]] of Value field
 
! Notes
 
|-
 
| 0
 
| Byte
 
|
 
|-
 
| 1
 
| VarInt
 
|
 
|-
 
| 2
 
| Float
 
|
 
|-
 
| 3
 
| String
 
|
 
|-
 
| 4
 
| [[Chat]]
 
|
 
|-
 
| 5
 
| OptChat (Boolean + Optional [[Chat]])
 
| [[Chat]] is present if the Boolean is set to true
 
|-
 
| 6
 
| [[Slot]]
 
|
 
|-
 
| 7
 
| Boolean
 
|
 
|-
 
| 8
 
| Rotation
 
| 3 floats: rotation on x, rotation on y, rotation on z
 
|-
 
| 9
 
| [[Data Types#Position|Position]]
 
|
 
|-
 
| 10
 
| OptPosition (Boolean + Optional Position)
 
| Position is present if the Boolean is set to true
 
|-
 
| 11
 
| Direction (VarInt)
 
| (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
|-
 
| 12
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|-
 
| 13
 
| OptBlockID (VarInt)
 
| 0 for absent otherwise, <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
 
|-
 
| 14
 
| [[NBT]]
 
|
 
|-
 
| 15
 
| [[Data Types#Particle|Particle]]
 
|
 
|- {{Added}}
 
| 16
 
| Villager Data
 
| 3 VarInts: villager type, villager profession, level
 
|- {{Added}}
 
| 17
 
| OptVarInt
 
| 0 for absent; 1 + actual value otherwise.  Used for entity IDs.
 
|- {{Added}}
 
| 18
 
| Pose
 
| A VarInt enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: DYING
 
|}
 
 
 
Villager type (<code>minecraft:villager_type</code> registry):
 
 
 
{| class="wikitable"
 
! Name !! ID
 
|-
 
| <code>minecraft:desert</code> || 0
 
|-
 
| <code>minecraft:jungle</code> || 1
 
|-
 
| <code>minecraft:plains</code> || 2
 
|-
 
| <code>minecraft:savanna</code> || 3
 
|-
 
| <code>minecraft:snow</code> || 4
 
|-
 
| <code>minecraft:swamp</code> || 5
 
|-
 
| <code>minecraft:taiga</code> || 6
 
|}
 
 
 
Villager professions (<code>minecraft:villager_profession</code> registry):
 
 
 
{| class="wikitable"
 
! Name !! ID
 
|-
 
| <code>minecraft:none</code> || 0
 
|-
 
| <code>minecraft:armorer</code> || 1
 
|-
 
| <code>minecraft:butcher</code> || 2
 
|-
 
| <code>minecraft:cartographer</code> || 3
 
|-
 
| <code>minecraft:cleric</code> || 4
 
|-
 
| <code>minecraft:farmer</code> || 5
 
|-
 
| <code>minecraft:fisherman</code> || 6
 
|-
 
| <code>minecraft:fletcher</code> || 7
 
|-
 
| <code>minecraft:leatherworker</code> || 8
 
|-
 
| <code>minecraft:librarian</code> || 9
 
|-
 
| <code>minecraft:mason</code> || 10
 
|-
 
| <code>minecraft:nitwit</code> || 11
 
|-
 
| <code>minecraft:shepherd</code> || 12
 
|-
 
| <code>minecraft:toolsmith</code> || 13
 
|-
 
| <code>minecraft:weaponsmith</code> || 14
 
|}
 
 
 
=== Mobs ===
 
 
 
Entity IDs have shifted with the addition of some new mobs.
 
 
 
=== Entity ===
 
 
 
The base class.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
|rowspan="9"| 0
 
|rowspan="9"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="9"| 0
 
|-
 
| 0x01
 
| On Fire
 
|-
 
| 0x02
 
| Crouched
 
|-
 
| 0x04
 
| Unused (previously riding)
 
|-
 
| 0x08
 
| Sprinting
 
|-
 
| 0x10
 
| Swimming
 
|-
 
| 0x20
 
| Invisible
 
|-
 
| 0x40
 
| Glowing effect
 
|-
 
| 0x80
 
| Flying with {{Minecraft Wiki|elytra}}
 
|-
 
| 1
 
| VarInt
 
|colspan="2"| Air
 
| 300
 
|-
 
| 2
 
| 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
 
|- {{Added}}
 
| 6
 
| Pose
 
|colspan="2"| Pose
 
| STANDING
 
|}
 
 
 
=== Itemed Throwable ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
Used for all things that previously extended throwable other than potions, which already had an item.
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 7
 
| Slot
 
|colspan="2"| Item
 
| empty (which behaves as if it were a specific item, depending on the subclass)
 
|}
 
 
 
=== Egg ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
An empty item behaves as if the item were a <code>minecraft:egg</code>.
 
 
 
=== Ender Pearl ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
An empty item behaves as if the item were a <code>minecraft:ender_pearl</code>.
 
 
 
=== Experience Bottle ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
<code>minecraft:experience_bottle</code>
 
 
 
=== Snowball ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
<code>minecraft:snowball</code>
 
 
 
=== Eye of Ender ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 7
 
| Slot
 
|colspan="2"| Item
 
| empty (which behaves as if it were a <code>minecraft:ender_eye</code>)
 
|}
 
 
 
=== Arrow ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
Abstract base class for [[#TippedArrow|TippedArrow]] (which is used for regular arrows as well as tipped ones) and Spectral Arrow.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| rowspan="3" | {{change|6|7}}
 
| rowspan="3" | Byte
 
! Bit mask
 
! Meaning
 
| rowspan="3" | 0
 
|-
 
| 0x01
 
| Is critical
 
|-
 
| 0x02
 
| Is noclip (used by loyalty tridents when returning)
 
|-
 
| {{change|7|8}}
 
| OptUUID
 
|colspan="2"| Shooter UUID
 
| Empty
 
|- {{added}}
 
| 9
 
| Byte
 
|colspan="2"| Piercing level
 
| 0
 
|}
 
 
 
=== TippedArrow ===
 
 
 
Extends [[#Arrow|Arrow]].
 
 
 
Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|8|10}}
 
| VarInt
 
|colspan="2"| Color (-1 for no particles)
 
| -1
 
|}
 
 
 
=== Trident ===
 
 
 
Extends [[#Arrow|Arrow]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|8|10}}
 
| VarInt
 
|colspan="2"| Loyalty level (enchantment)
 
| 0
 
|}
 
 
 
=== Itemed Fireball ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
Used for regular and small fireballs.  Not used for dragon fireballs and wither skulls.  Interestingly, regular fireballs do not come from an item.
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 7
 
| Slot
 
|colspan="2"| Item
 
| empty (which behaves as if it were a <code>minecraft:fire_charge</code>)
 
|}
 
 
 
=== Fireball ===
 
 
 
Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the large fireball shot by ghasts.
 
 
 
No additional metadata.
 
 
 
=== Small Fireball ===
 
 
 
Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the fireball shot by blazes and dispensers with fire charges.
 
 
 
No additional metadata.
 
 
 
=== Fireworks ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|6|7}}
 
| [[Slot]]
 
|colspan="2"| Firework info
 
| empty
 
|-
 
| {{change|7|8}}
 
| {{Change|VarInt|OptVarInt}}
 
|colspan="2"| Entity ID of entity which used firework (for elytra boosting)
 
| 0
 
|- {{Added}}
 
| 9
 
| Boolean
 
|colspan="2"| Shot at angle (from a crossbow)
 
| false
 
|}
 
  
 
=== Living ===
 
=== Living ===
Line 634: Line 129:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  |rowspan="5"| {{change|6|7}}
+
  |rowspan="5"| 7
 
  |rowspan="5"| Byte
 
  |rowspan="5"| Byte
 
  |colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
 
  |colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
Line 651: Line 146:
 
  | In riptide spin attack
 
  | In riptide spin attack
 
  |-
 
  |-
  | {{change|7|8}}
+
  | 8
 
  | Float
 
  | Float
 
  |colspan="2"| Health
 
  |colspan="2"| Health
 
  | 1.0
 
  | 1.0
 
  |-
 
  |-
  | {{change|8|9}}
+
  | 9
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Potion effect color (or 0 if there is no effect)
 
  |colspan="2"| Potion effect color (or 0 if there is no effect)
 
  | 0
 
  | 0
 
  |-
 
  |-
  | {{change|9|10}}
+
  | 10
 
  | Boolean
 
  | Boolean
 
  |colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
 
  |colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
 
  | false
 
  | false
 
  |-
 
  |-
  | {{change|10|11}}
+
  | 11
 
  | VarInt
 
  | VarInt
 
  |colspan="2"| Number of arrows in entity
 
  |colspan="2"| Number of arrows in entity
Line 672: Line 167:
 
  |- {{Added}}
 
  |- {{Added}}
 
  | 12
 
  | 12
 +
| VarInt
 +
|colspan="2"| Health added by absorption (based on the AbsorptionAmount tag)
 +
| 0
 +
|-
 +
| {{change|12|13}}
 
  | OptBlockPos
 
  | OptBlockPos
  |colspan="2"| Unknown (Bed location?)
+
  |colspan="2"| Sleeping location (from SleepingX, SleepingY, SleepingZ tags)
 
  | Absent
 
  | Absent
 
  |}
 
  |}
  
=== Panda ===
+
=== Bee ===
  
Extends [[#Animal|Animal]].
+
Extends [[#Insentient|Insentient]].
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 687: Line 187:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 15
+
  |rowspan="5"| 16
| Integer
+
  |rowspan="5"| Byte
  |colspan="2"| Breed timer?  Set to 32 when something happens, and then counts down to 0 again.  At 29 and 14 (before counting down), will play the <code>entity.panda.cant_breed</code> sound event.
+
  |colspan="2"| Flags
| 0
+
  |rowspan="5"| 0
|-
 
| 16
 
| Integer
 
  |colspan="2"| Sneeze timer.  Counts up from 0; when it hits 1 the <code>entity.panda.pre_sneeze</code> event plays and when it hits 21 the <code>entity.panda.sneeze</code> event plays (and it is set back to 0 and the sneeze flag is cleared).
 
  | 0
 
 
  |-
 
  |-
  | 17
+
  | 0x01 || ''Unused''
| Integer
 
|colspan="2"| Eat timer.  If nonzero, counts upwards.
 
| 0
 
 
  |-
 
  |-
  | 18
+
  | 0x02 || Is angry
| Byte
 
|colspan="2"| Main Gene
 
| 0
 
 
  |-
 
  |-
  | 19
+
  | 0x04 || Has stung
| Byte
 
|colspan="2"| Hidden Gene
 
| 0
 
 
  |-
 
  |-
  |rowspan="6"| 20
+
  | 0x08 || Has nectar
|rowspan="6"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="6"| 0
 
 
  |-
 
  |-
  | 0x01
+
  | 17
| Unused
 
|-
 
| 0x02
 
| Is sneezing
 
|-
 
| 0x04
 
| Is eating
 
|-
 
| 0x08
 
| Unknown
 
|-
 
| 0x10
 
| Unknown
 
|}
 
 
 
=== Fox ===
 
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
 
  | VarInt
 
  | VarInt
  | colspan="2" | Type (0: red, 1: snow)
+
  |colspan="2"| Anger
| 0 (red)
 
|-
 
| rowspan="9" | 16
 
| rowspan="9" | Byte
 
! Bit mask
 
! Meaning
 
| rowspan="9" | 0
 
|-
 
| 0x01 || Sitting
 
|-
 
| 0x02 || ''Unused''
 
|-
 
| 0x04 || Crouching
 
|-
 
| 0x08 || Unknown
 
|-
 
| 0x10 || Unknown
 
|-
 
| 0x20 || Sleeping
 
|-
 
| 0x40 || Unknown
 
|-
 
| 0x80 || Unknown
 
|-
 
| 17
 
| OptUUID
 
| colspan="2" | First UUID (in <code>UUIDs</code> NBT)?
 
| Absent
 
|-
 
| 18
 
| OptUUID
 
| colspan="2" | Second UUID (in <code>UUIDs</code> NBT)?
 
| Absent
 
|}
 
 
 
=== Mooshroom ===
 
 
 
Extends [[#Cow|Cow]].
 
 
 
{{change|No additional metadata.}}
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| String
 
| colspan="2"| Variant ("red" or "brown")
 
| red
 
|}
 
 
 
=== Raid Participent ===
 
 
 
{{change||Extends [[#Monster|Monster]].}}
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 14
 
| boolean
 
| colspan="2"| Is celebrating
 
| false
 
|}
 
 
 
"Is celebrating" appears to control the pose for vindicators and does not appear to be used by other types.
 
 
 
=== Abstract Illager ===
 
 
 
Extends {{change|[[#Monster|Monster]]|[[#Raid Participent|Raid Participent]]}}.
 
 
 
{| class="wikitable" {{removed}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
|rowspan="2"| 12
 
|rowspan="2"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="2"| 0
 
|-
 
| 0x01
 
| Has target (aggressive state)
 
|}
 
 
 
{{Change||Replaced with pose (presumably?)}}
 
 
 
=== Spellcaster Illager ===
 
 
 
Extends [[#Abstract Illager|Abstract Illlager]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|13|15}}
 
| Byte
 
| colspan="2"| Spell (0: none, 1: summon vex, 2: attack, 3: wololo, 4: disappear, 5: blindness)
 
 
  | 0
 
  | 0
 
  |}
 
  |}
  
=== {{change|EvocationIllager|Evoker}} ===
+
=== Wolf ===
  
Extends [[#Spellcaster Illager|Spellcaster Illager]].
+
Extends [[#TameableAnimal|TameableAnimal]].
 
 
=== {{change|IllusionIllager|Illusioner}} ===
 
 
 
Extends [[#Spellcaster Illager|Spellcaster Illager]].
 
 
 
=== Pillager ===
 
 
 
Extends [[#Abstract Illager|Abstract Illlager]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| Boolean
 
| colspan="2"| Using crossbow
 
| false
 
|}
 
 
 
=== {{change|VindicationIllager|Vindicator}} ===
 
 
 
Extends [[#Abstract Illager|Abstract Illager]].
 
 
 
=== Ravager ===
 
 
 
Extends [[#Raid Participent|Raid Participent]]
 
 
 
No additional metadata.
 
 
 
{| class="wikitable" {{added}}
 
! Status
 
!colspan="2"| Description
 
|-
 
| 4
 
|colspan="2"| Starts the attack animation.
 
|-
 
| 39
 
|colspan="2"| Starts the stun animation.
 
|}
 
 
 
=== Witch ===
 
 
 
Extends {{change|[[#Monster|Monster]]|[[#Raid Participent|Raid Participent]]}}.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 910: Line 215:
 
  !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)
 
  |-
 
  |-
  | {{change|12|15}}
+
  | 18
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is drinking potion
+
  |colspan="2"| Is begging
 
  | false
 
  | false
|}
 
 
=== AbstractSkeleton ===
 
 
Extends [[#Monster|Monster]].
 
 
{| class="wikitable" {{removed}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
 
  |-
 
  |-
  | {{change|12|14}}
+
  | 19
  | Boolean
+
  | VarInt
  |colspan="2"| Is swinging arms
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
  | false
+
  | 14 (Red)
 
  |}
 
  |}
  
{{Change||Replaced with pose (presumably?)}}
+
=== Enderman ===
 
 
=== Zombie ===
 
  
 
Extends [[#Monster|Monster]].
 
Extends [[#Monster|Monster]].
Line 945: Line 242:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|12|14}}
+
  | 15
  | Boolean
+
  | Opt BlockID
  |colspan="2"| Is baby
+
  |colspan="2"| Carried block
  | false
+
  | Absent
 
  |-
 
  |-
  | {{change|13|15}}
+
  | 16
| VarInt
 
|colspan="2"| Unused (previously type)
 
| 0
 
|- {{removed}}
 
| 14
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Are hands held up
+
  |colspan="2"| Is screaming
 
  | false
 
  | false
  |-
+
  |- {{added}}
| {{change|15|16}}
+
| 17
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is becoming a drowned
+
  |colspan="2"| Is stared at
 
  | false
 
  | false
 
  |}
 
  |}
  
{{Change||Replaced with pose (presumably?)}}
+
=== Trident ===
  
=== Zombie Villager ===
+
Extends [[#Arrow|Arrow]].
 
 
Extends [[#Zombie|Zombie]].
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 978: Line 268:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | {{change|16|17}}
+
  | 10
| Boolean
 
|colspan="2"| Is converting
 
| false
 
|-
 
| {{change|17|18}}
 
| {{Change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
 
 
 
 
=== Ocelot ===
 
 
 
Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|- {{removed}}
 
| 15
 
 
  | VarInt
 
  | VarInt
  |colspan="2"| Type (0 = untamed, 1 = tuxedo, 2 = tabby, 3 = siamese).  Used to render regardless as to whether it is tamed or not.
+
  |colspan="2"| Loyalty level (enchantment)
 
  | 0
 
  | 0
  |- {{added}}
+
  |- {{Added}}
  | 15
+
  | 11
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is trusting
+
  |colspan="2"| Has enchantment glint
  | false
+
  | False
 
  |}
 
  |}
  
{| class="wikitable" {{added}}
+
== Block Actions ==
! Status
 
!colspan="2"| Description
 
|-
 
| 40
 
|colspan="2"| Spawn smoke particles (trust gaining failed)
 
|-
 
| 41
 
|colspan="2"| Spawn heart particles (trust gaining succeeded)
 
|}
 
  
=== Cat ===
+
No changes so far.
  
Extends [[#TameableAnimal|TameableAnimal]].
+
== Inventories ==
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 17
 
| VarInt
 
|colspan="2"| Type (0 = tabby, 1 = black, 2 = red, 3 = siamese, 4 = british_shorthair, 5 = calico, 6 = persian, 7 = ragdoll, 8 = white, 9 = all_black)
 
| 1
 
|-
 
| 18
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 19
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 20
 
| VarInt
 
|colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 
| 14 (Red)
 
|}
 
 
 
=== Horse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|15|17}}
 
| VarInt
 
|colspan="2"| Variant (Color & Style)
 
| 0
 
|- {{removed}}
 
| 16
 
| VarInt
 
|colspan="2"| Armor (0: none, 1: iron, 2: gold, 3: diamond)
 
| 0 (none)
 
|- {{removed}}
 
| 17
 
| [[Slot]]
 
|colspan="2"| Armor Item (Forge only)
 
| Empty
 
|}
 
 
 
{{change||Replaced with [[#Entity Equipment|Entity Equipment]] packet. (Uses chestplate slot)}}
 
 
 
=== Trader Llama ===
 
 
 
Extends [[#Llama|Llama]].
 
 
 
No additional metadata.
 
 
 
=== Villager ===
 
 
 
Extends [[#Ageable|Ageable]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|13|15}}
 
| {{change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession (Farmer = 0, Librarian = 1, Priest = 2, Blacksmith = 3, Butcher = 4, Nitwit = 5)|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
 
 
== Block Actions ==
 
  
 
No changes so far.
 
No changes so far.
Line 1,109: Line 289:
 
== Plugin Channels ==
 
== Plugin Channels ==
  
=== <code>minecraft:book_open</code> ===
+
No changes so far.
{{change|''Server to client''}}
 
 
 
{{change|When a player right clicks with a signed book. This tells the client to open the book GUI.}}
 
 
 
{{change|The payload is a VarInt enum for the selected hand: 0 for the main hand, 1 for the offhand.}}
 
 
 
{{change||Replaced with [[#Open Book|Open Book]] packet.}}
 
 
 
=== <code>minecraft:trader_list</code> ===
 
{{change|''Server to client''}}
 
 
 
{{change|The list of trades a villager NPC is offering.}}
 
 
 
{{change||Replaced with [[#Trade List|Trade List]] packet.}}
 
 
 
=== <code>minecraft:debug/poi_ticket_count</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/poi_added</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/poi_removed</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/village_sections</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/goal_selector</code> ===
 
{{Need Info|Unknown channel}}
 
=== <code>minecraft:debug/brain</code> ===
 
{{Need Info|Unknown channel}}
 
  
 
== Play ==
 
== Play ==
  
 
=== Clientbound ===
 
=== Clientbound ===
 +
==== Spawn Mob ====
  
==== Spawn Object ====
+
Sent by the server when a mob entity is spawned.
 
 
Sent by the server when a vehicle or other object is created.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,154: Line 306:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="12"| 0x00
+
  |rowspan="13"| 0x03
  |rowspan="12"| Play
+
  |rowspan="13"| Play
  |rowspan="12"| Client
+
  |rowspan="13"| Client
 
  | Entity ID
 
  | Entity ID
 
  | VarInt
 
  | VarInt
  | EID of the object
+
  |  
 
  |-
 
  |-
  | Object UUID
+
  | Entity UUID
 
  | UUID
 
  | UUID
 
  |  
 
  |  
 
  |-
 
  |-
 
  | Type
 
  | Type
  | {{change|Byte|VarInt}}
+
  | VarInt
  | The type of object. {{change|(see [[Entities#Objects]])|Uses the same entity type IDs as in Spawn Mob}}
+
  | The type of mob. See [[Entities#Mobs]]
 
  |-
 
  |-
 
  | X
 
  | X
Line 1,179: Line 331:
 
  | Z
 
  | Z
 
  | Double
 
  | Double
 +
|
 +
|-
 +
| Yaw
 +
| Angle
 
  |  
 
  |  
 
  |-
 
  |-
Line 1,185: Line 341:
 
  |  
 
  |  
 
  |-
 
  |-
  | Yaw
+
  | Head Pitch
 
  | Angle
 
  | Angle
 
  |  
 
  |  
|-
 
| Data
 
| Int
 
| Meaning dependent on the value of the Type field, see [[Object Data]] for details.
 
 
  |-
 
  |-
 
  | Velocity X
 
  | Velocity X
 
  | Short
 
  | Short
  |rowspan="3"| Same units as [[#Entity Velocity|Entity Velocity]].  Always sent, but only used when Data is greater than 0 (except for some entities which always ignore it; see [[Object Data]] for details).
+
  | Same units as [[#Entity Velocity|Entity Velocity]]
 
  |-
 
  |-
 
  | Velocity Y
 
  | Velocity Y
 
  | Short
 
  | Short
 +
| Same units as [[#Entity Velocity|Entity Velocity]]
 
  |-
 
  |-
 
  | Velocity Z
 
  | Velocity Z
 
  | Short
 
  | Short
 +
| Same units as [[#Entity Velocity|Entity Velocity]]
 +
|- {{removed}}
 +
| Metadata
 +
| [[Entities#Entity Metadata Format|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|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.
 +
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="8"| 0x05
 +
|rowspan="8"| Play
 +
|rowspan="8"| Client
 +
| Entity ID
 +
| VarInt
 +
| Player's EID
 +
|-
 +
| Player UUID
 +
| UUID
 +
| See below for notes on {{Minecraft Wiki|Server.properties#online-mode|offline mode}} and NPCs
 +
|-
 +
| X
 +
| Double
 +
|
 +
|-
 +
| Y
 +
| Double
 +
|
 +
|-
 +
| Z
 +
| Double
 +
|
 +
|-
 +
| Yaw
 +
| Angle
 +
|
 +
|-
 +
| Pitch
 +
| Angle
 +
|
 +
|- {{removed}}
 +
| Metadata
 +
| [[Entities#Entity Metadata Format|Entity Metadata]]
 +
|
 
  |}
 
  |}
 +
 +
When in {{Minecraft Wiki|Server.properties#online-mode|online mode}}, the UUIDs must be valid and have valid skin blobs.
 +
 +
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).
 +
 +
For NPCs UUID v2 should be used. Note:
 +
 +
<+Grum> i will never confirm this as a feature you know that :)
 +
 +
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>.
  
 
==== Update Block Entity ====
 
==== Update Block Entity ====
Line 1,216: Line 436:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x09
+
  |rowspan="3"| {{change|0x09|0x0A}}
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
 
  |rowspan="3"| Client
 
  |rowspan="3"| Client
Line 1,243: Line 463:
 
* '''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''': {{change|Declare a shulker box, no data appears to be sent and the client seems to do fine without this packet. Perhaps it is a leftover from earlier versions?}}
+
* '''10''': Unused
 
* '''11''': Declare a bed
 
* '''11''': Declare a bed
* '''12''': {{Change||Set data of a jigsaw block}}
+
* '''12''': Set data of a jigsaw block
* '''13''': {{Change||Set items in a campfire}}
+
* '''13''': Set items in a campfire
 
+
* {{change||'''14''': Beehive information}}
==== Server Difficulty ====
 
 
 
Changes the difficulty setting in the client's option menu
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x0D
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Difficulty
 
| Unsigned Byte
 
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
|- {{Added}}
 
| Difficulty locked?
 
| Boolean
 
|
 
|}
 
 
 
==== Open Horse Window ====
 
 
 
{{Change||This packet is used exclusively for opening the horse GUI.  [[#Open Window|Open Window]] is used for all other GUIs, and now has ID 0x59.}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x1F
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Window ID?
 
| Byte
 
|
 
|-
 
| Number of slots?
 
| VarInt
 
|
 
|-
 
| Entity ID?
 
| Integer
 
|
 
|}
 
  
 
==== 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).
Line 1,314: Line 485:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x22|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 1,332: Line 503:
 
  | VarInt
 
  | VarInt
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
  |- {{Added}}
+
  |-
 
  | Heightmaps
 
  | Heightmaps
 
  | [[NBT]]
 
  | [[NBT]]
  | Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry).
+
  | Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
  |-  
+
|- {{Added}}
 +
| Biomes
 +
| 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 1,350: Line 525:
 
  |-
 
  |-
 
  | Block entities
 
  | Block entities
  | Array of [[NBT]]
+
  | Array of [[NBT|NBT Tag]]
 
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
  |}
 
  |}
 +
 +
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 1,365: Line 544:
 
  |-
 
  |-
 
  | Data
 
  | Data
  | Array of [[#Chunk Section structure|Chunk Section]]
+
  | Array of [[Chunk Format#Chunk Section structure|Chunk Section]]
 
  | The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
 
  | 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 Int Array
 
  | Optional Int Array
  | Only sent if Ground-Up Continuous is true; 256 entries if present
+
  | Only sent if full chunk is true; 256 entries if present
 
  |}
 
  |}
  
===== Chunk Section structure =====
+
==== Particle ====
  
A Chunk Section is defined in terms of other [[data types]]. A Chunk Section consists of the following fields:
+
Displays the named particle.
  
 
{| class="wikitable"
 
{| class="wikitable"
  |-
+
  ! Packet ID
 +
! State
 +
! Bound To
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
|- {{added}}
 
| Block count
 
| Short
 
| Number of non-air blocks present in the chunk section, for lighting purposes.  "Non-air" is defined as any block other than air, cave air, and void air (in particular, note that fluids such as water are still counted).
 
 
  |-
 
  |-
  | Bits Per Block
+
  |rowspan="11"| {{Change|0x23|0x24}}
  | Unsigned Byte
+
|rowspan="11"| Play
  | Determines how many bits are used to encode a block. Note that not all numbers are valid here.
+
|rowspan="11"| Client
 +
| Particle ID
 +
| Int
 +
| The particle ID listed in [[#Particle|the particle data type]].
 +
|-
 +
| Long Distance
 +
| Boolean
 +
| If true, particle distance increases from 256 to 65536
 +
|-
 +
| X
 +
| {{Change|Float|Double}}
 +
| X position of the particle
 +
|-
 +
| Y
 +
| {{Change|Float|Double}}
 +
| Y position of the particle
 +
|-
 +
| Z
 +
| {{Change|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()
 
  |-
 
  |-
  | Palette
+
  | Particle Data
  | Varies
+
  | Float
  | See below for the format.
+
  | The data of each particle
 
  |-
 
  |-
  | Data Array Length
+
  | Particle Count
  | VarInt
+
  | Int
  | Number of longs in the following array
+
  | The number of particles to create
 
  |-
 
  |-
  | Data Array
+
  | Data
  | Array of Long
+
  | Varies
  | Compacted list of 4096 indices pointing to state IDs in the Palette
+
  | The variable data listed in [[#Particle|the particle data type]].
|- {{removed}}
 
| Block Light
 
| Byte Array
 
| Half byte per block
 
|- {{removed}}
 
| Sky Light
 
| Optional Byte Array
 
| Only if in the Overworld; half byte per block
 
 
  |}
 
  |}
 
Data Array{{change|, Block Light, and Sky Light are|is}} given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates.  {{change|For the half-byte light arrays, even-indexed items (those with an even x coordinate, starting at 0) are packed into the ''low bits'', odd-indexed into the ''high bits''.}}
 
  
 
==== Join Game ====
 
==== Join Game ====
Line 1,426: Line 624:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| 0x25
+
  |rowspan="9"| {{change|0x25|0x26}}
  |rowspan="8"| Play
+
  |rowspan="9"| Play
  |rowspan="8"| Client
+
  |rowspan="9"| Client
 
  | Entity ID
 
  | Entity ID
 
  | Int
 
  | Int
Line 1,440: Line 638:
 
  | Int Enum
 
  | Int Enum
 
  | -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
 
  | -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
  |- {{removed}}
+
  |- {{Added}}
  | Difficulty
+
  | Hashed seed
  | Unsigned Byte
+
  | Long
  | 0: peaceful, 1: easy, 2: normal, 3: hard
+
  | First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
 
  | Max Players
 
  | Max Players
Line 1,451: Line 649:
 
  | Level Type
 
  | Level Type
 
  | String Enum (16)
 
  | String Enum (16)
  | default, flat, largeBiomes, amplified, default_1_1
+
  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
  |- {{added}}
+
  |-
 
  | View Distance
 
  | View Distance
 
  | VarInt
 
  | VarInt
  | Render distance (2-32)  
+
  | Render distance (2-32)
 
  |-
 
  |-
 
  | Reduced Debug Info
 
  | Reduced Debug Info
 
  | Boolean
 
  | Boolean
 
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
|}
 
 
==== Map Data ====
 
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="17"| 0x26
 
|rowspan="17"| Play
 
|rowspan="17"| Client
 
|colspan="2"| Map ID
 
|colspan="2"| VarInt
 
| 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 player and item frame icons are shown
 
 
  |- {{Added}}
 
  |- {{Added}}
  |colspan="2"| Locked
+
  | Enable respawn screen
|colspan="2"| Boolean
 
| True if the map has been locked in a cartography table
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="5"| Icon
 
| Type
 
|rowspan="6"| Array
 
| VarInt enum
 
| See below
 
|-
 
| X
 
| Byte
 
| Map coordinates: -128 for furthest left, +127 for furthest right
 
|-
 
| Z
 
| Byte
 
| Map coordinates: -128 for highest, +127 for lowest
 
|-
 
| Direction
 
| Byte
 
| 0-15
 
|-
 
| Has Display Name
 
 
  | Boolean
 
  | Boolean
  |
+
  | Set to false when the doImmediateRespawn gamerule is true
|-
 
| 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
 
|-
 
| 10
 
| White Banner
 
|-
 
| 11
 
| Orange Banner
 
|-
 
| 12
 
| Magenta Banner
 
|-
 
| 13
 
| Light Blue Banner
 
|-
 
| 14
 
| Yellow Banner
 
|-
 
| 15
 
| Lime Banner
 
|-
 
| 16
 
| Pink Banner
 
|-
 
| 17
 
| Gray Banner
 
|-
 
| 18
 
| Light Gray Banner
 
|-
 
| 19
 
| Cyan Banner
 
|-
 
| 20
 
| Purple Banner
 
|-
 
| 21
 
| Blue Banner
 
|-
 
| 22
 
| Brown Banner
 
|-
 
| 23
 
| Green Banner
 
|-
 
| 24
 
| Red Banner
 
|-
 
| 25
 
| Black Banner
 
|-
 
| 26
 
| Treasure marker
 
|}
 
 
 
==== Open Book ====
 
 
 
Sent when a player right clicks with a signed book. This tells the client to open the book GUI.
 
 
 
{| class="wikitable" {{Added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x2D
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| Hand
 
| VarInt enum
 
| 0: Main hand, 1: Off hand
 
|}
 
 
 
==== Use Bed ====
 
 
 
{{change|This packet tells that a player goes to bed.}}
 
 
 
{{change|The client with the matching Entity ID will go into bed mode.}}
 
 
 
{{change|This Packet is sent to all nearby players including the one sent to bed.}}
 
 
 
{{change|Any packets sent with a location not currently occupied by a bed will be ignored by clients.}}
 
 
 
{| class="wikitable" {{removed}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x33
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Entity ID
 
| VarInt
 
| Sleeping player's EID
 
|-
 
| Location
 
| Position
 
| Block location of the head part of the bed
 
 
  |}
 
  |}
  
Line 1,701: Line 676:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x3A
+
  |rowspan="4"| {{change|0x3A|0x3B}}
 
  |rowspan="4"| Play
 
  |rowspan="4"| Play
 
  |rowspan="4"| Client
 
  |rowspan="4"| Client
Line 1,707: Line 682:
 
  | Int Enum
 
  | Int Enum
 
  | -1: The Nether, 0: The Overworld, 1: The End
 
  | -1: The Nether, 0: The Overworld, 1: The End
  |- {{removed}}
+
  |- {{Added}}
  | Difficulty
+
  | Hashed seed
  | Unsigned Byte
+
  | Long
  | 0: Peaceful, 1: Easy, 2: Normal, 3: Hard
+
  | First 8 bytes of the SHA-256 hash of the world's seed.
 
  |-
 
  |-
 
  | Gamemode
 
  | Gamemode
Line 1,724: Line 699:
  
 
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.}}
 
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.}}
 
==== Entity Sound Effect ====
 
 
Plays a sound effect from an entity.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| 0x50
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Sound ID
 
| VarInt
 
| ID of hardcoded sound event ([https://pokechu22.github.io/Burger/18w48a.html#sounds events] as of 18w48a)
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Entity ID
 
| VarInt
 
|
 
|-
 
| Volume
 
| Float
 
| 1.0 is 100%, capped between 0.0 and 1.0 by Notchian clients
 
|-
 
| Pitch
 
| Float
 
| Float between 0.5 and 2.0 by Notchian clients
 
|}
 
 
==== Declare Recipes ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x54|0x5A}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
|colspan="2"| Num Recipes
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Recipe
 
|{{removed}}| Recipe ID
 
|rowspan="4"| Array
 
|{{removed}}| Identifier
 
|{{removed}}|
 
|-
 
| Type
 
| {{Change|String|Identifier}}
 
| The recipe serializer, see below
 
|- {{Added}}
 
| Recipe ID
 
| Identifier
 
|
 
|-
 
| Data
 
| Optional, varies
 
| Additional data for the recipe.  For some types, there will be no data.
 
|}
 
 
Recipe serializers:
 
 
{| class="wikitable"
 
! Serializer
 
! Description
 
! Data
 
|-
 
| <code>{{change||minecraft:}}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>{{change||minecraft:}}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>{{change||minecraft:}}crafting_special_armordye</code>
 
| Recipe for dying leather armor
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bookcloning</code>
 
| Recipe for copying contents of written books
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapcloning</code>
 
| Recipe for copying maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapextending</code>
 
| Recipe for adding paper to maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_rocket</code>
 
| Recipe for making firework rockets
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star</code>
 
| Recipe for making firework stars
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star_fade</code>
 
| Recipe for making firework stars fade between multiple colors
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_repairitem</code>
 
| Recipe for repairing items via crafting
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_tippedarrow</code>
 
| Recipe for crafting tipped arrows
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bannerduplicate</code>
 
| Recipe for copying banner patterns
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_banneraddpattern</code>
 
| Recipe for adding patterns to banners
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shielddecoration</code>
 
| Recipe for applying a banner's pattern to a shield
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shulkerboxcoloring</code>
 
| Recipe for recoloring a shulker box
 
| None
 
|- {{Added}}
 
| <code>minecraft:crafting_special_suspiciousstew</code>
 
| Recipe for crafting suspicious stew with various affects.
 
| None
 
|-
 
| <code>{{change||minecraft:}}smelting</code>
 
| Smelting recipe
 
|rowspan="4"| All of these have the same format, as follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |-
 
    | Experience
 
    | Float
 
    |
 
    |-
 
    | Cooking time
 
    | VarInt
 
    |
 
    |}
 
|- {{Added}}
 
| <code>minecraft:blasting</code>
 
| Recipes in a blast furnace.
 
|- {{Added}}
 
| <code>minecraft:smoking</code>
 
| Recipes in a smoker.
 
|- {{Added}}
 
| <code>minecraft:campfire_cooking</code>
 
| Recipes in a campfire.
 
|}
 
 
Ingredient is defined as:
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Description
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Items
 
| Array of [[Slot]]
 
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
|}
 
 
==== Tags ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| {{change|0x55|0x5B}}
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Block Tags
 
| (See below)
 
| IDs are block IDs
 
|-
 
| Item Tags
 
| (See below)
 
| IDs are item IDs
 
|-
 
| Fluid Tags
 
| (See below)
 
| IDs are fluid IDs
 
|- {{added}}
 
| Entity Tags
 
| (See below)
 
| IDs are entity type IDs
 
|}
 
 
==== Update Light ====
 
 
Updates light levels for a chunk.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="8"| 0x24
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| Chunk X
 
| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Chunk Z
 
| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Sky Light Mask
 
| VarInt
 
| Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
 
|-
 
| Block Light Mask
 
| VarInt
 
| Mask containing 18 bits, with the same order as sky light
 
|-
 
| Empty Sky Light Mask
 
| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
 
|-
 
| Empty Block Light Mask
 
| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their block light values.  If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the block light arrays.
 
|-
 
| Sky Light arrays
 
| Array of arrays of 2048 bytes
 
| There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
 
|-
 
| Block Light arrays
 
| Array of arrays of 2048 bytes
 
| There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
 
|}
 
 
Individual block or sky light arrays are is given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates. Even-indexed items (those with an even x coordinate, starting at 0) are packed into the low bits, odd-indexed into the high bits.
 
 
==== Open Window ====
 
 
This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.  {{change||For horses, use [[#Open Horse Window|Open Horse Window]]}}
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{change|0x14|0x2E}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Window ID
 
| {{change|Unsigned Byte|VarInt}}
 
| A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
 
|-
 
| Window Type
 
| {{change|String (32)|VarInt}}
 
| The window type to use for display. {{change|See [[Inventory]] for a list|contained in the <code>minecraft:menu</code> regisry}}.
 
|-
 
| Window Title
 
| [[Chat]]
 
| The title of the window
 
|- {{removed}}
 
| Number Of Slots
 
| Unsigned Byte
 
| Number of slots in the window (excluding the number of slots in the player inventory). Always 0 for non-storage windows (e.g. Workbench, Anvil).
 
|- {{removed}}
 
| Entity ID
 
| Optional Int
 
| EntityHorse's EID. Only sent when Window Type is “EntityHorse”
 
|}
 
 
==== Trade List ====
 
 
The list of trades a villager NPC is offering.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="16"| 0x27
 
|rowspan="16"| Play
 
|rowspan="16"| Client
 
|-
 
| colspan="2" | Window ID
 
| colspan="2" | VarInt
 
| The ID of the window that is open; this is an int rather than a byte.
 
|-
 
| colspan="2" | Size
 
| colspan="2" | Byte
 
| The number of trades in the following array
 
|-
 
| rowspan="10" | Trades
 
| Input item 1
 
| rowspan="10" | Array
 
| [[Slot]]
 
| The first item the villager is buying
 
|-
 
| Output item
 
| [[Slot]]
 
| The item the villager is selling
 
|-
 
| Has second item
 
| Boolean
 
| Whether there is a second item
 
|-
 
| Input item 2
 
| Optional [[Slot]]
 
| The second item the villager is buying; only present if they have a second item.
 
|-
 
| Trade disabled
 
| Boolean
 
| True if the trade is disabled; false if the trade is enabled.
 
|-
 
| Number of trade uses
 
| Integer
 
| Number of times the trade has been used so far
 
|-
 
| Maximum number of trade uses
 
| Integer
 
| Number of times this trade can be used
 
|- {{Added}}
 
| XP
 
| Integer
 
|
 
|- {{Added}}
 
| Special Price
 
| Integer
 
|
 
|- {{Added}}
 
| Price Multiplier
 
| Float
 
|
 
|- {{Added}}
 
|colspan="2"| Villager level
 
|colspan="2"| VarInt
 
| Appears on the trade GUI; meaning comes from the translation key <code>merchant.level.</code> + level.
 
1: Novice, 2: Apprentice, 3: Journeyman, 4: Expert, 5: Master
 
|- {{Added}}
 
|colspan="2"| Experience
 
|colspan="2"| VarInt
 
| Total experience for this villager (always 0 for the wandering trader)
 
|- {{Added}}
 
|colspan="2"| Is regular villager
 
|colspan="2"| Boolean
 
| True if this is a regular villager; false for the wandering trader.  When false, hides the villager level and some other GUI elements.
 
|}
 
 
==== Update View Position ====
 
 
{{Need Info|Why is this even needed?  Is there a better name for it?  My guess is that it's something to do with logical behavior with latency, but it still seems weird.}}
 
 
Updates the client's location.  This is used to determine what chunks should remain loaded and if a chunk load should be ignored; chunks outside of the view distance may be unloaded.
 
 
Sent whenever the player moves across a chunk border horizontally, and also (according to testing) for any integer change in the vertical axis, even if it doesn't go across a chunk section border.
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x40
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Chunk X
 
| VarInt
 
| Chunk X coordinate of the player's position
 
|-
 
| Chunk Z
 
| VarInt
 
| Chunk Z coordinate of the player's position
 
|}
 
 
==== Update View Distance ====
 
 
Sent by the integrated singleplayer server when changing render distance.  Does not appear to be used by the dedicated server, as <code>view-distance</code> in server.properties cannot be changed at runtime.
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x41
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| View Distance
 
| VarInt
 
| Render distance (2-32)
 
|}
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Set Difficulty ====
+
No changes so far.
 
 
Must have at least op level 2 to use.  Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x02
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| New difficulty
 
| Byte
 
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
|}
 
 
 
==== Lock Difficulty ====
 
 
 
Must have at least op level 2 to use.  Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x0F
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Locked
 
| Boolean
 
|
 
|}
 
 
 
==== Recipe Book Data ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="11"| {{change|0x1B|0x1D}}
 
|rowspan="11"| Play
 
|rowspan="11"| Server
 
|colspan="2"| Type
 
| VarInt
 
| Determines the format of the rest of the packet
 
|-
 
! Type
 
! Field Name
 
!
 
!
 
|-
 
| 0: Displayed Recipe
 
| Recipe ID
 
| Identifier
 
| A recipe ID
 
|-
 
|rowspan="8"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
| Boolean
 
| Whether the player has the crafting recipe book currently opened/active.
 
|-
 
| Crafting Recipe Filter Active
 
| Boolean
 
| Whether the player has the crafting recipe book filter option currently active.
 
|-
 
| Smelting Recipe Book Open
 
| Boolean
 
| Whether the player has the smelting recipe book currently opened/active.
 
|-
 
| Smelting Recipe Filter Active
 
| Boolean
 
| Whether the player has the smelting recipe book filter option currently active.
 
|- {{Added}}
 
| Blasting Recipe Book Open
 
| Boolean
 
| May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
 
|- {{Added}}
 
| Blasting Recipe Filter Active
 
| Boolean
 
| May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
 
|- {{Added}}
 
| Smoking Recipe Book Open
 
| Boolean
 
|
 
|- {{Added}}
 
| Smoking Recipe Filter Active
 
| Boolean
 
|
 
|}
 
 
 
The Recipe Book Status type is sent when one of the states changes.
 
 
 
==== Update Jigsaw Block ====
 
 
 
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x27
 
|rowspan="4"| Play
 
|rowspan="4"| Server
 
| Location
 
| Position
 
| Block entity location
 
|-
 
| Attachment type
 
| Identifier
 
|
 
|-
 
| Target pool
 
| Identifier
 
|
 
|-
 
| Final state
 
| String
 
| "Turns into" on the GUI, <code>final_state</code> in NBT
 
|}
 
 
 
==== Player Block Placement ====
 
 
 
{| class="wikitable"
 
|-
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="9"| {{change|0x29|0x2C}}
 
|rowspan="9"| Play
 
|rowspan="9"| Server
 
|{{removed}}| Location
 
|{{removed}}| Position
 
|{{removed}}| Block position
 
|- {{removed}}
 
| Face
 
| VarInt Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
|-
 
| Hand
 
| VarInt Enum
 
| The hand from which the block is placed; 0: main hand, 1: off hand
 
|- {{added}}
 
| Location
 
| Position
 
| Block position
 
|- {{added}}
 
| Face
 
| VarInt Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
|-
 
| Cursor Position X
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from west to east
 
|-
 
| Cursor Position Y
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from bottom to top
 
|-
 
| Cursor Position Z
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from north to south
 
|- {{added}}
 
| Inside block
 
| Boolean
 
| True when the player's head is inside of a block.
 
|}
 
 
 
Upon placing a block, this packet is sent once.
 
 
 
The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to sixteen pixel in the default resource pack. For example, let's say a slab is being placed against the south face of a full block. The Cursor Position X will be higher if the player was pointing near the right (east) edge of the face, lower if pointing near the left. The Cursor Position Y will be used to determine whether it will appear as a bottom slab (values 0.0–0.5) or as a top slab (values 0.5-1.0). The Cursor Position Z should be 1.0 since the player was looking at the southernmost part of the block.
 
 
 
{{Change||Inside block is true when a player's head (specifically eyes) are inside of a block's collision.  In 1.13 and later versions, collision is rather complicated and individual blocks can have multiple collision boxes.  For instance, a ring of vines has a non-colliding hole in the middle.  This value is only true when the player is directly in the box.  In practice, though, this value is only used by scaffolding to place in front of the player when sneaking inside of it (other blocks will place behind when you intersect with them -- try with glass for instance).}}
 
  
 
== Handshaking ==
 
== Handshaking ==
Line 2,432: Line 729:
 
  | Protocol Version
 
  | Protocol Version
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|404|476}})
+
  | See [[protocol version numbers]] (currently {{change|498|573}})
 
  |-
 
  |-
 
  | 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 17:06, 10 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, protocol 573). 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 Health added by absorption (based on the AbsorptionAmount tag) 0
12 13 OptBlockPos Sleeping location (from SleepingX, SleepingY, SleepingZ tags) Absent

Bee

Extends Insentient.

Index Type Meaning Default
16 Byte Flags 0
0x01 Unused
0x02 Is angry
0x04 Has stung
0x08 Has nectar
17 VarInt Anger 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 Is stared at false

Trident

Extends Arrow.

Index Type Meaning Default
10 VarInt Loyalty level (enchantment) 0
11 Boolean Has enchantment glint 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.
Enable respawn screen Boolean Set to false when the doImmediateRespawn gamerule is true

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 498 573)
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.