Pre-release protocol: Difference between revisions

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imported>Pokechu22
(→‎Chunk Data: remove confusion about Biomes array meaning (it was added when Biomes length was added, but that's just a side effect of the change to a VarInt array))
imported>Pokechu22
Line 301: Line 301:
  | Biomes
  | Biomes
  | {{change|Optional|}} Array of VarInt
  | {{change|Optional|}} Array of VarInt
  | 1024 biome IDs, ordered by x then z then y, in 4×4×4 blocks.  {{change|Not present if full chunk is false.|}}
  | 1024 biome IDs, ordered by x then z then y, in 4×4×4 blocks.  {{change|Not present if full chunk is false.|}} See [[Chunk Format#Biomes|Chunk Format § Biomes]].
  |-  
  |-  
  | Size
  | Size

Revision as of 00:28, 2 April 2021

This page documents the changes from the last stable Minecraft release (currently 1.16.5, protocol 754) to the current pre-release (currently 21w07a, protocol Snapshot {{#expr: 1073741839 - 1073741824}}). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

{{#vardefine:meta_prerelease|1}}

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

Entity

{{#if:Entity||Must specify the current entity ID for Template:Metadata inherit}} {{#vardefine:meta_current_entity|Entity}}

{{#if:{{#var:meta_prerelease}}| 

   {{#if:
       | {{#if:
           | Extends {{#if:[[{{#varexists:meta_{{{inherits}}}|Entity metadata}}#{{{inherits}}}|{{{inherits}}}]]|[[{{#varexists:meta_{{{inherits}}}|Entity metadata}}#{{{inherits}}}|{{{inherits}}}]]}}{{#if:[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]|{{#if:[[{{#varexists:meta_{{{inherits}}}|Entity metadata}}#{{{inherits}}}|{{{inherits}}}]]| }}[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]}}.
           | Extends [[{{#varexists:meta_{{{inherits}}}|Entity metadata}}#{{{inherits}}}|{{{inherits}}}]].
       }}{{#if:
           | {{#vardefine:meta_Entity|{{{start_at}}}}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}|start_at in use when inherited entity {{{inherits}}} exists}}
           | {{#vardefine:meta_Entity|{{#var:meta_{{{inherits}}}|0}}}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}||Inherited entity {{{inherits}}} does not exist}}
       }}{{#if:
           | {{#vardefine:meta_pre_Entity|}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}|start_at in use when inherited entity {{{inherits}}} exists}}
           | {{#vardefine:meta_pre_Entity|{{#var:meta_pre_{{{inherits}}}|0}}}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}||Inherited entity {{{inherits}}} does not exist}}
       }}
       | The base class.
       {{#vardefine:meta_Entity|0}}
       {{#vardefine:meta_pre_Entity|0}}
   }}

| 

   {{#if:
       | Extends [[#{{{inherits}}}|{{{inherits}}}]].
       {{#if:
           | {{#vardefine:meta_Entity|{{{start_at}}}}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}|start_at in use when inherited entity {{{inherits}}} exists}}
           | {{#vardefine:meta_Entity|{{#var:meta_{{{inherits}}}|0}}}}
           {{#if:{{#varexists:meta_{{{inherits}}}}}||Inherited entity {{{inherits}}} does not exist}}
       }}
       | The base class.
       {{#vardefine:meta_Entity|0}}
   }}

}}

Index Type Meaning Default
{{#if:{{#var:meta_prerelease}}| 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

Byte Bit mask Meaning 0
0x01 Is on fire
0x02 Is crouching
0x04 Unused (previously riding)
0x08 Is sprinting
0x10 Is swimming
0x20 Is invisible
0x40 has glowing effect
0x80 Is flying with an elytra 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

VarInt Air ticks 300 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

OptChat Custom name empty 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

Boolean Is custom name visible false 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

Boolean Is silent false 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

Boolean Has no gravity false 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch:
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id 
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: |||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

Pose Pose STANDING 
   {{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
   {{#switch: added
added = 
       {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
removed = 
       {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
= 
       {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }}
       {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
       {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}
#default = 
       Invalid parameter to Template:Metadata id added
   }}

   {{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
   {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
   {{#ifeq: added|||Template:Metadata id must be used as {{Metadata id|}} (with an empty first parameter) for technical reasons}}

}}

VarInt Ticks frozen in powdered snow 0

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Sculk Vibration Signal

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

This packet shows a permanent particle.

Chunk Data

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

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

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x20|0x20}}{{#if:0x21|{{#if:0x20| }}0x21}} Play Client Chunk X Int Chunk coordinate (block coordinate divided by 16, rounded down)
Chunk Z Int Chunk coordinate (block coordinate divided by 16, rounded down)
Full chunk Boolean See Chunk Format
Primary Bit Mask VarInt Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
Bit Mask Length VarInt Length of the following array
Primary Bit Mask Array of Long BitSet with bits (world height in blocks / 16) set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from the lowest y to 15 blocks above).
Heightmaps NBT Compound containing one long array named MOTION_BLOCKING, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a WORLD_SURFACE long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
Biomes length Optional}}{{#if:|{{#if:Optional| }}}} VarInt Not present if full chunk is false.}}{{#if:|{{#if:Not present if full chunk is false.| }}}}
Biomes Optional}}{{#if:|{{#if:Optional| }}}} Array of VarInt Not present if full chunk is false.}}{{#if:|{{#if:Not present if full chunk is false.| }}}} See Chunk Format § Biomes.
Size VarInt Size of Data in bytes
Data Byte array See data structure in Chunk Format
Number of block entities VarInt Number of elements in the following array
Block entities Array of NBT Tag All block entities in the chunk. Use the x, y, and z tags in the NBT to determine their positions.

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

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

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

0020863148418841 0000000000100000100001100011000101001000010000011000100001000001
01018A7260F68C87 0000000100000001100010100111001001100000111101101000110010000111

Update Light

Updates light levels for a chunk.

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x23|0x23}}{{#if:0x24|{{#if:0x23| }}0x24}} Play Client Chunk X VarInt Chunk coordinate (block coordinate divided by 16, rounded down)
Chunk Z VarInt Chunk coordinate (block coordinate divided by 16, rounded down)
Trust Edges Boolean If edges should be trusted for light updates.
Sky Light Mask VarInt Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
Block Light Mask VarInt Mask containing 18 bits, with the same order as sky light
Empty Sky Light Mask VarInt Mask containing 18 bits, which indicates sections that have 0 for all their sky light values. If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks). If it is only set in this mask, it is not included in the sky light arrays.
Empty Block Light Mask VarInt Mask containing 18 bits, which indicates sections that have 0 for all their block light values. If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks). If it is only set in this mask, it is not included in the block light arrays.
Length 1 VarInt Length of the following array
Sky Light Mask Array of Long BitSet containing bits for each sections in the world + 2 (lowest bit 16-1 blocks below min world height, highest 1-16 above max world height)
Length 2 VarInt Length of the following array
Block Light Mask Array of Long BitSet containing bits for each sections in the world + 2, same order as sky light
Length 3 VarInt Length of the following array
Empty Sky Light Mask Array of Long BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their sky light values
Length 4 VarInt Length of the following array
Empty Block Light Mask Array of Long BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their block light values
Sky Light array count VarInt Number of entries in the following array
Sky Light arrays Length Array VarInt Length of the following array in bytes (always 2048)
Sky Light array Array of 2048 bytes There is 1 array for each bit set to true in the sky light mask, starting with the lowest value. Half a byte per light value.
Block Light array count VarInt Number of entries in the following array
Block Light arrays Length Array VarInt Length of the following array in bytes (always 2048)
Block Light array Array of 2048 bytes There is 1 array for each bit set to true in the block light mask, starting with the lowest value. Half a byte per light value.


Map Data

Updates a rectangular area on a map item.

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x25|0x25}}{{#if:0x26|{{#if:0x25| }}0x26}} Play Client Map ID VarInt Map ID of the map being modified
Scale Byte From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
Tracking Position Boolean Specifies whether player and item frame icons are shown
Locked Boolean True if the map has been locked in a cartography table
Tracking Position Boolean Specifies whether player and item frame icons are shown
Icon Count VarInt }}{{#if:Only present if "Tracking Position" is true.|{{#if:| }}Only present if "Tracking Position" is true.}}
Icon Type Array VarInt enum See below
X Byte Map coordinates: -128 for furthest left, +127 for furthest right
Z Byte Map coordinates: -128 for highest, +127 for lowest
Direction Byte 0-15
Has Display Name Boolean
Display Name Optional Chat Only present if previous Boolean is true
Columns Unsigned Byte Number of columns updated
Rows Optional Byte Only if Columns is more than 0; number of rows updated
X Optional Byte Only if Columns is more than 0; x offset of the westernmost column
Z Optional Byte Only if Columns is more than 0; z offset of the northernmost row
Length Optional VarInt Only if Columns is more than 0; length of the following array
Data Optional Array of Unsigned Byte Only if Columns is more than 0; see Map item format

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

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

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

Player Position And Look (clientbound)

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

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

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

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

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

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x34|0x34}}{{#if:0x35|{{#if:0x34| }}0x35}} Play Client X Double Absolute or relative position, depending on Flags.
Y Double Absolute or relative position, depending on Flags.
Z Double Absolute or relative position, depending on Flags.
Yaw Float Absolute or relative rotation on the X axis, in degrees.
Pitch Float Absolute or relative rotation on the Y axis, in degrees.
Flags Byte Bit field, see below.
Teleport ID VarInt Client should confirm this packet with Teleport Confirm containing the same Teleport ID.
Dismount Vehicle Boolean True if the player should dismount their vehicle.

About the Flags field: 

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

Resource Pack Send

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x38|0x38}}{{#if:0x39|{{#if:0x38| }}0x39}} Play Client URL String (32767) The URL to the resource pack.
Hash String (40) A 40 character hexadecimal and lowercase SHA-1 hash of the resource pack file. (must be lower case in order to work)
If it's not a 40 character hexadecimal string, the client will not use it for hash verification and likely waste bandwidth — but it will still treat it as a unique id
Forced Boolean The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.

Tags

Packet ID State Bound To Field Name Field Type Notes
{{#if:0x5B|0x5B}}{{#if:0x5C|{{#if:0x5B| }}0x5C}} Play Client
Block Tags (See below) IDs are block IDs
Item Tags (See below) IDs are item IDs
Fluid Tags (See below) IDs are fluid IDs
Entity Tags (See below) IDs are entity IDs
Length of the array VarInt
Array of tags Tag type Array Identifier Tag identifier (Vanilla required tags are minecraft:block, minecraft:item, minecraft:fluid, minecraft:entity_type, and minecraft:game_event)
Array of Tag (See below)

Tags look like:

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


Serverbound

Client Settings

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

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

Displayed Skin Parts flags:

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

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

Handshaking

Clientbound

There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.

Serverbound

Handshake

This causes the server to switch into the target state.

Packet ID State Bound To Field Name Field Type Notes
0x00 Handshaking Server Protocol Version VarInt See protocol version numbers (currently {{#if:754|754}}{{#if:Snapshot {{#expr: 1073741839 - 1073741824}}|{{#if:754| }}Snapshot {{#expr: 1073741839 - 1073741824}}}})
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.

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