Difference between revisions of "Pre-release protocol"

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(→‎Mobs: Remove {{Change}} for old entity names (/summon in < 1.10) - they didn't actually change; the changes were there to indicate the old IDs rather than what they used to be informally named but it makes more sense to just put the real IDs there)
(1.16.3, no changes other than PVN)
 
(682 intermediate revisions by 35 users not shown)
Line 1: Line 1:
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.10.2, protocol 210]]) to the current pre-release (currently [[Protocol version numbers|16w41a, protocol 311]]). 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|1.15.2, protocol 578]]) to the current pre-release (currently [[Protocol version numbers|1.16.3, protocol 753]]). 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 ===
  
No changes so far.
+
The UUID type is now also sometimes encoded by the Notchian server as an array of four 32-bit integers, from most significant to least significant (matching the new format used on entity NBT).  This representation is identical to using 16 bytes, two 64-bit integers, or one 128-bit integers.
  
 
=== Packets ===
 
=== Packets ===
 
No changes so far.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 20: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Handshaking serverbound
+
!colspan="4"| Handshaking serverbound
{{PacketList|0x00|Handshake}}
+
{{PacketList|0x00|Handshake}}
 
  |-
 
  |-
!colspan="4"| Play clientbound
+
!colspan="4"| Play clientbound
{{PacketList|0x03|Spawn Mob}}
+
{{PacketList|0x02|Spawn Weather Entity|pre=removed}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x03|0x02}}|Spawn Living Entity|pre=unchanged}}
{{PacketList|0x0E|Tab-Complete (clientbound)}}
+
{{PacketList|{{change|0x04|0x03}}|Spawn Painting|pre=unchanged}}
{{PacketList|0x1B|Entity Status}}
+
{{PacketList|{{change|0x05|0x04}}|Spawn Player|pre=unchanged}}
{{PacketList|0x24|Map}}
+
{{PacketList|{{change|0x06|0x05}}|Entity Animation (clientbound)|pre=unchanged}}
{{PacketList|0x45|Title}}
+
{{PacketList|{{change|0x07|0x06}}|Statistics|pre=unchanged}}
{{PacketList|0x48|Collect Item}}
+
{{PacketList|{{change|0x08|0x07}}|Acknowledge Player Digging|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x08}}|Block Break Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x0A|0x09}}|Block Entity Data|pre=unchanged}}
 +
{{PacketList|{{change|0x0B|0x0A}}|Block Action|pre=unchanged}}
 +
{{PacketList|{{change|0x0C|0x0B}}|Block Change|pre=unchanged}}
 +
{{PacketList|{{change|0x0D|0x0C}}|Boss Bar|pre=unchanged}}
 +
{{PacketList|{{change|0x0E|0x0D}}|Server Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x0F|0x0E}}|Chat Message (clientbound)}}
 +
{{PacketList|{{change|0x11|0x0F}}|Tab-Complete (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x10}}|Declare Commands|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x11}}|Window Confirmation (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x12}}|Close Window (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x13}}|Window Items|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x14}}|Window Property|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x15}}|Set Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x16}}|Set Cooldown|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x17}}|Plugin Message (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x18}}|Named Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x19}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1A}}|Entity Status|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1B}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1C}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x1D}}|Change Game State|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x1E}}|Open Horse Window|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x1F}}|Keep Alive (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x20}}|Chunk Data}}
 +
{{PacketList|{{change|0x23|0x21}}|Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x22}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x23}}|Update Light}}
 +
{{PacketList|{{change|0x26|0x24}}|Join Game}}
 +
{{PacketList|{{change|0x27|0x25}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x26}}|Trade List|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x27}}|Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x28}}|Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x29}}|Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2A}}|Entity Movement|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2B}}|Vehicle Move (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2C}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x2D}}|Open Window|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x2E}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x2F}}|Craft Recipe Response|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x30}}|Player Abilities (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x31}}|Combat Event|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x32}}|Player Info|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x33}}|Face Player|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x34}}|Player Position And Look (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x35}}|Unlock Recipes}}
 +
{{PacketList|{{change|0x38|0x36}}|Destroy Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x37}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x38}}|Resource Pack Send|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x39}}|Respawn}}
 +
{{PacketList|{{change|0x3C|0x3A}}|Entity Head Look|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x3B}}|Multi Block Change}}
 +
{{PacketList|{{change|0x3D|0x3C}}|Select Advancement Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x3D}}|World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x3E}}|Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x3F}}|Held Item Change (clientbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x40}}|Update View Position|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x41}}|Update View Distance|pre=unchanged}}
 +
{{PacketList|0x47|Entity Equipment}}
 +
{{PacketList|{{change|0x4E|0x42}}|Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x4E}}|Time Update|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x4F}}|Title|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x50}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x51}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x52}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x53}}|Player List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x54}}|NBT Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x55}}|Collect Item|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x56}}|Entity Teleport|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x57}}|Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x58}}|Entity Properties}}
 +
{{PacketList|{{change|0x5A|0x59}}|Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5A}}|Declare Recipes}}
 +
{{PacketList|{{change|0x5C|0x5B}}|Tags|pre=unchanged}}
 
  |-
 
  |-
!colspan="4"| Play serverbound
+
!colspan="4"| Play serverbound
{{PacketList|0x02|Chat Message (serverbound)}}
+
{{PacketList|0x0E|Interact Entity}}
{{PacketList|0x1C|Player Block Placement}}
+
{{PacketList|0x0F|Generate Structure|rel=added}}
 +
{{PacketList|{{change|0x0F|0x10}}|Keep Alive (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x10|0x11}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Player Position And Rotation (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Player Movement|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Vehicle Move (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Steer Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Craft Recipe Request|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Player Abilities (serverbound)}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Player Digging|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Entity Action|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Steer Vehicle|pre=unchanged}}
 +
{{PacketList|0x1D|Recipe Book Data|pre=removed}}
 +
{{PacketList|0x1E|Set Displayed Recipe|rel=added}}
 +
{{PacketList|0x1F|Set Recipe Book State|rel=added}}
 +
{{PacketList|{{change|0x1E|0x20}}|Name Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x21}}|Resource Pack Status|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x22}}|Advancement Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x23}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x24}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x25}}|Held Item Change (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x26}}|Update Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x27}}|Update Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x28}}|Creative Inventory Action|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x29}}|Update Jigsaw Block}}
 +
{{PacketList|{{change|0x28|0x2A}}|Update Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2B}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2C}}|Animation (serverbound)|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2D}}|Spectate|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2E}}|Player Block Placement|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2F}}|Use Item|pre=unchanged}}
 
  |-
 
  |-
|}
+
!colspan="4"| Login clientbound
 +
{{PacketList|0x02|Login Success}}
 +
|}
  
 
== New/modified data types ==
 
== New/modified data types ==
  
=== Objects ===
+
No changes so far.
  
Objects are spawned via [[Protocol#Spawn_Object|Spawn Object]]. See [[Object Data]] for more details.
+
== Entity Metadata ==
 
 
{| class="wikitable"
 
|-
 
! ID
 
! Name
 
! x, z
 
! y
 
|-
 
| 1
 
| Boat
 
| 1.5
 
| 0.6
 
|-
 
| 2
 
| Item Stack ([[Slot]])
 
| 0.25
 
| 0.25
 
|-
 
| 3
 
| Area Effect Cloud
 
| ?
 
| ?
 
|-
 
| 10
 
| Minecart
 
| 0.98
 
| 0.7
 
|-
 
| 50
 
| Activated TNT
 
| 0.98
 
| 0.98
 
|-
 
| 51
 
| EnderCrystal
 
| 2.0
 
| 2.0
 
|-
 
| 60
 
| Tipped arrow (projectile; also used for regular arrows)
 
| 0.5
 
| 0.5
 
|-
 
| 61
 
| Snowball (projectile)
 
| 0.25
 
| 0.25
 
|-
 
| 62
 
| Egg (projectile)
 
| 0.25
 
| 0.25
 
|-
 
| 63
 
| FireBall (ghast projectile)
 
| 1.0
 
| 1.0
 
|-
 
| 64
 
| FireCharge (blaze projectile)
 
| 0.3125
 
| 0.3125
 
|-
 
| 65
 
| Thrown Enderpearl
 
| 0.25
 
| 0.25
 
|-
 
| 66
 
| Wither Skull (projectile)
 
| 0.3125
 
| 0.3125
 
|-
 
| 67
 
| Shulker Bullet
 
| 0.3125
 
| 0.3125
 
|-
 
|style="background-color: #d9ead3;"|68
 
|style="background-color: #d9ead3;"|Llama spit
 
|style="background-color: #d9ead3;"|0.25
 
|style="background-color: #d9ead3;"|0.25
 
|-
 
| 70
 
| Falling Objects
 
| 0.98
 
| 0.98
 
|-
 
| 71
 
| Item frames
 
| varies
 
| varies
 
|-
 
| 72
 
| Eye of Ender
 
| 0.25
 
| 0.25
 
|-
 
| 73
 
| Thrown Potion
 
| 0.25
 
| 0.25
 
|-
 
| 75
 
| Thrown Exp Bottle
 
| 0.25
 
| 0.25
 
|-
 
| 76
 
| Firework Rocket
 
| 0.25
 
| 0.25
 
|-
 
| 77
 
| Leash Knot
 
| 0.5
 
| 0.5
 
|-
 
| 78
 
| ArmorStand
 
| 0.5
 
| 2.0
 
|-
 
|style="background-color: #d9ead3;"|79
 
|style="background-color: #d9ead3;"|Evocation Fangs
 
|style="background-color: #d9ead3;"|0.8
 
|style="background-color: #d9ead3;"|0.5
 
|-
 
| 90
 
| Fishing Float
 
| 0.25
 
| 0.25
 
|-
 
| 91
 
| Spectral Arrow
 
| 0.5
 
| 0.5
 
|-
 
| 93
 
| Dragon Fireball
 
| 0.3125
 
| 0.3125
 
|}
 
 
 
Since release {{Minecraft Wiki|1.6}}, all minecarts are spawned with object type 10 and their functionality is then specified in the [[Object Data#Minecarts (id 10)|Data field]] within the packet. Also, their visual appearance may be sent via the [[Protocol#Entity Metadata|Entity Metadata]] packet.
 
  
 +
{{#vardefine:meta_prerelease|1}}
  
=== Mobs ===
+
=== FishingHook ===
  
Mobs are spawned via [[Protocol#Spawn_Mob|Spawn Mob]]. {{change|There are two extra mob types in the code that refer to mobs classes that can never spawn: Mob and Monster (they are always subclasses, aka another more specific type).}}
+
{{Metadata inherit|FishingHook|inherits=Entity|start_at=7}}
  
 
{| class="wikitable"
 
{| class="wikitable"
|-
 
! Type
 
! Name
 
! x, z
 
! y
 
! ID
 
|- style="background-color: #d9ead3;"
 
| 4
 
| ElderGuardian
 
| 0.85
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:elder_guardian</code>
 
|- style="background-color: #d9ead3;"
 
| 5
 
| WitherSkeleton
 
| 0.7
 
| 2.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither_skeleton</code>
 
|- style="background-color: #d9ead3;"
 
| 6
 
| Stray
 
| 0.6
 
| 1.99
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:stray</code>
 
|- style="background-color: #d9ead3;"
 
| 23
 
| Husk
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:husk</code>
 
|- style="background-color: #d9ead3;"
 
| 27
 
| ZombieVillager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_villager</code>
 
|- style="background-color: #d9ead3;"
 
| 28
 
| SkeletonHorse
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton_horse</code>
 
|- style="background-color: #d9ead3;"
 
| 29
 
| ZombieHorse
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_horse</code>
 
|- style="background-color: #d9ead3;"
 
| 31
 
| Donkey
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:donkey</code>
 
|- style="background-color: #d9ead3;"
 
| 32
 
| Mule
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mule</code>
 
|- style="background-color: #d9ead3;"
 
| 33
 
| EvocationFangs
 
| 0.5
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:evocation_fangs</code>
 
|- style="background-color: #d9ead3;"
 
| 34
 
| EvocationIllager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:evocation_illager</code>
 
|- style="background-color: #d9ead3;"
 
| 35
 
| Vex
 
| 0.4
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:vex</code>
 
|- style="background-color: #d9ead3;"
 
| 36
 
| VindicationIllager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:vindication_illager</code>
 
|- style="background-color: #f4cccc;"
 
| 48
 
| Mob
 
| N/A
 
| N/A
 
| N/A
 
|- style="background-color: #f4cccc;"
 
| 49
 
| Monster
 
| N/A
 
| N/A
 
| N/A
 
|-
 
| 50
 
| Creeper
 
| 0.6
 
| 1.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:creeper</code>
 
|-
 
| 51
 
| Skeleton
 
| 0.6
 
| 1.99
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton</code>
 
|-
 
| 52
 
| Spider
 
| 1.4
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:spider</code>
 
|-
 
| 53
 
| Giant
 
| 0.6 * 6
 
| 1.8 * 6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:giant</code>
 
|-
 
| 54
 
| Zombie
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie</code>
 
|-
 
| 55
 
| Slime
 
| 0.51000005 * size
 
| 0.51000005 * size
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:slime</code>
 
|-
 
| 56
 
| Ghast
 
| 4
 
| 4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ghast</code>
 
|-
 
| 57
 
| PigZombie
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_pigman</code>
 
|-
 
| 58
 
| Enderman
 
| 0.6
 
| 2.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:enderman</code>
 
|-
 
| 59
 
| CaveSpider
 
| 0.7
 
| 0.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cave_spider</code>
 
|-
 
| 60
 
| Silverfish
 
| 0.4
 
| 0.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:silverfish</code>
 
|-
 
| 61
 
| Blaze
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:blaze</code>
 
|-
 
| 62
 
| LavaSlime (Magma Cube)
 
| 0.51000005 * size
 
| 0.51000005 * size
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:magma_cube</code>
 
|-
 
| 63
 
| EnderDragon
 
| 16.0
 
| 8.0
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ender_dragon</code>
 
|-
 
| 64
 
| WitherBoss
 
| 0.9
 
| 3.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither</code>
 
|-
 
| 65
 
| Bat
 
| 0.5
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:bat</code>
 
|-
 
| 66
 
| Witch
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:witch</code>
 
|-
 
| 67
 
| Endermite
 
| 0.4
 
| 0.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:endermite</code>
 
|-
 
| 68
 
| Guardian
 
| 0.85
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:guardian</code>
 
|-
 
| 69
 
| Shulker
 
| 1
 
| 1
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:shulker</code>
 
|-
 
| 90
 
| Pig
 
| 0.9
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:pig</code>
 
|-
 
| 91
 
| Sheep
 
| 0.9
 
| 1.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:sheep</code>
 
|-
 
| 92
 
| Cow
 
| 0.9
 
| 1.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cow</code>
 
|-
 
| 93
 
| Chicken
 
| 0.4
 
| 0.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:chicken</code>
 
|-
 
| 94
 
| Squid
 
| 0.8
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:squid</code>
 
|-
 
| 95
 
| Wolf
 
| 0.6
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wolf</code>
 
|-
 
| 96
 
| MushroomCow (Mooshroom)
 
| 0.9
 
| 1.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mooshroom</code>
 
|-
 
| 97
 
| SnowMan
 
| 0.7
 
| 1.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:snowman</code>
 
|-
 
| 98
 
| Ozelot (Ocelot)
 
| 0.6
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ocelot</code>
 
|-
 
| 99
 
| VillagerGolem (Iron Golem)
 
| 1.4
 
| 2.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager_golem</code>
 
|-
 
| 100
 
| EntityHorse
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:horse</code>
 
|-
 
| 101
 
| Rabbit
 
| 0.4
 
| 0.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:rabbit</code>
 
|-
 
| 102
 
| PolarBear
 
| 1.3
 
| 1.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:polar_bear</code>
 
|- style="background-color: #d9ead3;"
 
| 103
 
| Llama
 
| 1.3964844
 
| 1.87
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:llama</code>
 
|- style="background-color: #d9ead3;"
 
| 104
 
| LlamaSpit
 
| 0.25
 
| 0.25
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:llama_spit</code>
 
|-
 
| 120
 
| Villager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager</code>
 
|}
 
 
=== Entity Metadata ===
 
 
=== EvocationIllager ===
 
 
Extends [[#Monster|Monster]].
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
  | Byte
+
| VarInt
  | Unknown (Probably hands up animation)
+
|colspan="2"| Hooked entity id + 1, or 0 if there is no hooked entity
 +
| 0
 +
|- {{Added}}
 +
  | {{Metadata id|added}}
 +
| Boolean
 +
|colspan="2"| Is catchable
 +
  | False
 
  |}
 
  |}
  
=== Vex ===
+
=== Abstract Arrow ===
 +
 
 +
{{Metadata inherit|Abstract Arrow|inherits=Entity|start_at=7}}
  
Extends [[#Monster|Monster]].
+
Abstract base class for [[#Tipped Arrow|Tipped Arrow]] (which is used for regular arrows as well as tipped ones) and [[#Spectral Arrow|Spectral Arrow]].
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  |rowspan="3"| 12
+
  | rowspan="3" | {{Metadata id|}}
  |rowspan="3"| Byte
+
  | rowspan="3" | Byte
 
  ! Bit mask
 
  ! Bit mask
 
  ! Meaning
 
  ! Meaning
  |- style="background-color: #d9ead3;"
+
  | rowspan="3" | 0
 +
|-
 
  | 0x01
 
  | 0x01
  | Is in attack mode
+
  | Is critical
 +
|-
 +
| 0x02
 +
| Is noclip (used by loyalty tridents when returning)
 +
|- {{removed}}
 +
| {{Metadata id|removed}}
 +
| OptUUID
 +
|colspan="2"| Unused
 +
| Empty
 +
|-
 +
| {{Metadata id|}}
 +
| Byte
 +
|colspan="2"| Peircing level
 +
| 0
 
  |}
 
  |}
  
=== VindicationIllager ===
+
=== Tipped Arrow ===
 +
 
 +
{{Metadata inherit|Tipped Arrow|inherits=Abstract Arrow}}
  
Extends [[#Monster|Monster]].
+
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" style="background-color: #d9ead3;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  |rowspan="3"| 12
+
  | {{Metadata id|}}
  |rowspan="3"| Byte
+
  | VarInt
! Bit mask
+
  |colspan="2"| Color (-1 for no particles)
! Meaning
+
  | -1
  |- style="background-color: #d9ead3;"
 
| 0x01
 
  | Has target (aggressive state)
 
 
  |}
 
  |}
  
=== EvocationFangs ===
+
=== Spectral Arrow ===
  
Extends [[#Entity|Entity]].
+
{{Metadata inherit|Spectral Arrow|inherits=Abstract Arrow}}
  
=== AbstractSkeleton ===
+
No additional metadata.
 
 
Extends [[#Monster|Monster]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 12
 
| Boolean
 
|colspan="2"| Is swinging arms
 
|}
 
  
=== Skeleton ===
+
=== Trident ===
  
Extends [[#AbstractSkeleton|AbstractSkeleton]].
+
{{Metadata inherit|Trident|inherits=Abstract Arrow}}
  
{| class="wikitable" style="background-color: #f4cccc;"
+
{| class="wikitable"
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
 
  | VarInt
 
  | VarInt
  |colspan="2"| Type (Normal = 0, Wither = 1, Stray = 2)
+
  |colspan="2"| Loyalty level (enchantment)
 +
| 0
 
  |-
 
  |-
  | 13
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is swinging arms (Used to animate arms for melee attacks; only used when the skeleton does not have a bow in its hand)
+
  |colspan="2"| Has enchantment glint
 +
| False
 
  |}
 
  |}
  
=== Wither Skeleton ===
+
=== Strider ===
 
 
Extends [[#AbstractSkeleton|AbstractSkeleton]].
 
 
 
=== Stray ===
 
 
 
Extends [[#AbstractSkeleton|AbstractSkeleton]].
 
 
 
=== Zombie ===
 
  
Extends [[#Monster|Monster]].
+
{{Metadata inherit|Strider|inherits=Animal|start_at=16}}
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | 12
+
  | {{Metadata id|}}
  | Boolean
+
  | VarInt
  |colspan="2"| Is baby
+
  |colspan="2"| Total time to "boost" with warped fungus on a stick for
 +
| 0
 
  |-
 
  |-
  | 13
+
  | {{Metadata id|}}
| VarInt
 
|colspan="2"| {{change|Zombie type (0 for zombie, profession+1 for villagers, 6 for Husk)|Unused}}
 
|- style="background-color: #f4cccc;"
 
| 14
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is converting
+
  |colspan="2"| Is shaking (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava))
 +
| false
 
  |-
 
  |-
  | {{change|15|14}}
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Are hands held up
+
  |colspan="2"| Has saddle
 +
| false
 
  |}
 
  |}
  
=== Zombie Villager ===
+
=== Hoglin ===
  
Extends [[#Zombie|Zombie]].
+
{{Metadata inherit|Hoglin|inherits=Animal|start_at=16}}
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
  |- style="background-color: #d9ead3;"
+
! Default
  | 15
+
  |-
 +
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is converting
+
  |colspan="2"| Is immune to zombification
  |- style="background-color: #d9ead3;"
+
  | false
| 16
 
| VarInt
 
|colspan="2"| Profession
 
 
  |}
 
  |}
  
=== Husk ===
+
=== Zoglin ===
 
 
Extends [[#Zombie|Zombie]].
 
  
=== Guardian ===
+
{{Metadata inherit|Hoglin|inherits=Monster|start_at=15}}
  
Extends [[#Monster|Monster]].
+
{| class="wikitable" {{added}}
 
 
{| class="wikitable"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
|- style="background-color: #f4cccc;"
+
  ! Default
|rowspan="3"| 12
+
  |-
|rowspan="3"| Byte
+
  | {{Metadata id|}}
  ! Bit mask
 
! Meaning
 
|- style="background-color: #f4cccc;"
 
| 0x02
 
| is retracting spikes
 
  |- style="background-color: #f4cccc;"
 
  | 0x04
 
| is elderly
 
|- style="background-color: #d9ead3;"
 
| 12
 
 
  | Boolean
 
  | Boolean
  |colspan="2"| Is retracting spikes
+
  |colspan="2"| Is baby
  |-
+
  | false
| 13
 
| VarInt
 
|colspan="2"| Target EID
 
 
  |}
 
  |}
  
=== ElderGuardian ===
+
=== Base Piglin ===
  
Extends [[#Guardian|Guardian]].
+
{{Metadata inherit|Base Piglin|inherits=Monster|start_at=15}}
  
=== AbstractHorse ===
+
{| class="wikitable" {{added}}
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  |rowspan="9"| 13
+
  | {{Metadata id|}}
|rowspan="9"| Byte
+
  | Boolean
! Bit mask
+
  |colspan="2"| Is immune to zombification
! Meaning
+
| false
|-
 
| 0x01
 
| ''Unused''
 
|-
 
| 0x02
 
| Is Tame
 
|-
 
| 0x04
 
| Is saddled
 
|-
 
| 0x08
 
| Has Chest
 
|-
 
| 0x10
 
| Is Bred (not used on the Notchian server; controlled via the unused Bred NBT flag)
 
|-
 
  | 0x20
 
| Is eating
 
|-
 
| 0x40
 
| Is rearing (on hind legs)
 
|-
 
| 0x80
 
| Is mouth open
 
|-
 
| 14
 
| OptUUID
 
  |colspan="2"| Owner
 
 
  |}
 
  |}
  
=== Horse ===
+
=== Piglin ===
  
Extends [[#AbstractHorse|AbstractHorse]].
+
{{Metadata inherit|Piglin|inherits=Base Piglin}}
  
{| class="wikitable" style="background-color: #d9ead3;"
+
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | 15
+
  | {{Metadata id|}}
  | VarInt
+
| Boolean
  |colspan="2"| Variant (Color & Style)
+
|colspan="2"| Is baby
 +
| false
 +
  |-
 +
| {{Metadata id|}}
 +
| Boolean
 +
  |colspan="2"| Is charging crossbow
 +
| false
 
  |-
 
  |-
  | 16
+
  | {{Metadata id|}}
  | VarInt
+
  | Boolean
  |colspan="2"| Armor
+
  |colspan="2"| Is dancing
 +
| false
 
  |}
 
  |}
  
=== ZombieHorse ===
+
=== Piglin Brute ===
  
Extends [[#AbstractHorse|AbstractHorse]].
+
{{Metadata inherit|Piglin Brute|inherits=Base Piglin}}
  
=== SkeletonHorse ===
+
No additional metadata.
  
Extends [[#AbstractHorse|AbstractHorse]].
+
=== Wolf ===
  
=== ChestedHorse ===
+
{{Metadata inherit|Wolf|inherits=TameableAnimal|start_at=18}}
  
Extends [[#AbstractHorse|AbstractHorse]].
+
{| class="wikitable"
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | 15
+
  | {{Metadata id|}}
 
  | Boolean
 
  | Boolean
  |colspan="2"| Has Chest
+
  |colspan="2"| Is begging
 +
| false
 +
|-
 +
| {{Metadata id|}}
 +
| VarInt
 +
|colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 +
| 14 (Red)
 +
|- {{Added}}
 +
| {{Metadata id|}}
 +
| VarInt
 +
|colspan="2"| Anger time
 +
| 0
 
  |}
 
  |}
  
=== Donkey ===
+
=== {{Change|Zombie Pigman|Zombified Piglin}} ===
  
Extends [[#ChestedHorse|ChestedHorse]].
+
{{Metadata inherit|{{Change|Zombie Pigman|Zombified Piglin}}|inherits=Zombie|start_at=18}}
  
=== Llama ===
+
No additional metadata.
  
Extends [[#ChestedHorse|ChestedHorse]].
+
== Block Actions ==
  
{| class="wikitable" style="background-color: #d9ead3;"
+
No changes so far.
! Index
+
 
! Type
+
== Inventories ==
!style="width: 250px;" colspan="2"| Meaning
+
 
|-
+
No changes so far.
| 16
 
| Integer
 
| colspan="2"| Strength (number of columns of 3 slots in the llama's inventory once a chest is equipped)
 
|-
 
| 17
 
| Integer
 
| colspan="2"| Carpet color (a dye color, or -1 if no carpet equipped)
 
|-
 
| 18
 
| Integer
 
| colspan="2"| Variant (0: <code>llama_creamy.png</code>, 1: <code>llama_white.png</code>, 2: <code>llama_brown.png</code>, 3: <code>llama_gray.png</code>)
 
|}
 
  
=== Mule ===
+
== Plugin Channels ==
  
Extends [[#ChestedHorse|ChestedHorse]].
+
No changes so far.
  
=== Villager ===
+
== Play ==
  
Extends [[#Ageable|Ageable]].
+
=== Clientbound ===
  
{| class="wikitable"
+
==== Chat Message (clientbound) ====  
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 13
 
| VarInt
 
|colspan="2"| Profession (Farmer = 0, Librarian = 1, Priest = 2, Blacksmith = 3, Butcher = 4{{Change||, Nitwit {{=}} 5}})
 
|}
 
  
=== Shulker ===
+
Identifying the difference between Chat/System Message is important as it helps respect the user's chat visibility options.  See [[Chat#Processing chat|processing chat]] for more info about these positions.
  
Extends [[#Golem|Golem]].
+
{{warning2|Game info accepts json formatting but does not display it, although the deprecated §-based formatting works.  This is not an issue when using the [[#Title|Title]] packet, so prefer that packet for displaying information in that slot.  See [https://bugs.mojang.com/browse/MC-119145 MC-119145] for more information.}}
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Index
+
  ! Packet ID
  ! Type
+
  ! State
  ! style="width: 250px;" colspan="2"| Meaning
+
! Bound To
 +
! Field Name
 +
! Field Type
 +
  ! Notes
 
  |-
 
  |-
  | 12
+
  |rowspan="3"| {{change|0x0F|0x0E}}
  | Direction
+
  |rowspan="3"| Play
  |colspan="2"| Facing direction
+
  |rowspan="3"| Client
 +
| JSON Data
 +
| [[Chat]]
 +
| Limited to 32767 bytes
 
  |-
 
  |-
  | 13
+
  | Position
| OptPosition
 
|colspan="2"| Attachment position
 
|-
 
| 14
 
 
  | Byte
 
  | Byte
  |colspan="2"| Shield height
+
  | 0: chat (chat box), 1: system message (chat box), 2: game info (above hotbar).
  |- style="background-color: #d9ead3;"
+
  |- {{added}}
  | 15
+
  | Sender
  | Byte
+
  | UUID
  | colspan="2"| Color (dye color, default of purple)
+
  | Used by the Notchian client for the disableChat launch option. Setting both longs to 0 will always display the message regardless of the setting.
 
  |}
 
  |}
  
=== LlamaSpit ===
+
==== Chunk Data ====
 +
{{Main|Chunk Format}}
 +
{{See also|#Unload Chunk}}
  
Extends [[#Entity|Entity]].
+
{{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)}}
  
== Inventory ==
+
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).
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  ! Window Type
+
  |rowspan="11"| {{change|0x22|0x20}}
  ! Description
+
  |rowspan="11"| Play
 +
|rowspan="11"| Client
 +
| Chunk X
 +
| Int
 +
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | minecraft:chest
+
  | Chunk Z
  | {{Minecraft Wiki|Chest}}, large chest, or {{Minecraft Wiki|minecart with chest}}
+
  | Int
 +
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | minecraft:crafting_table
+
  | Full chunk
  | {{Minecraft Wiki|Crafting table}}
+
  | Boolean
 +
| See [[Chunk Format#Full chunk|Chunk Format]]
 
  |-
 
  |-
  | minecraft:furnace
+
  | Primary Bit Mask
  | {{Minecraft Wiki|Furnace}}
+
  | 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).
 
  |-
 
  |-
  | minecraft:dispenser
+
  | Heightmaps
  | {{Minecraft Wiki|Dispenser}}
+
  | [[NBT]]
 +
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 +
|- {{Added}}
 +
| Biomes length
 +
| Optional VarInt
 +
| Size of the following array.  Not present if full chunk is false.
 
  |-
 
  |-
  | minecraft:enchanting_table
+
  | Biomes
  | {{Minecraft Wiki|Enchantment table}}
+
  | Optional array of {{change|Integer|VarInt}}
 +
| {{change|1024 biome IDs, ordered by x then z then y, in 4&times;4&times;4 blocks.|Possibly something else.}} Not present if full chunk is false.
 +
|-
 +
| Size
 +
| VarInt
 +
| Size of Data in bytes
 
  |-
 
  |-
  | minecraft:brewing_stand
+
  | Data
  | {{Minecraft Wiki|Brewing stand}}
+
  | Byte array
 +
| See [[Chunk Format#Data structure|data structure]] in Chunk Format
 
  |-
 
  |-
  | minecraft:villager
+
  | Number of block entities
  | {{Minecraft Wiki|Villager}}
+
  | VarInt
 +
| Number of elements in the following array
 
  |-
 
  |-
  | minecraft:beacon
+
  | Block entities
  | {{Minecraft Wiki|Beacon}}
+
  | 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.
| minecraft:anvil
 
| {{Minecraft Wiki|Anvil}}
 
|-
 
| minecraft:hopper
 
| {{Minecraft Wiki|Hopper}} or {{Minecraft Wiki|minecart with hopper}}
 
|-
 
| minecraft:dropper
 
| {{Minecraft Wiki|Dropper}}
 
|-
 
|style="background-color: #d9ead3;"| minecraft:shulker_box
 
  |style="background-color: #d9ead3;"| {{Minecraft Wiki|Shulker box}}
 
|-
 
| EntityHorse
 
| {{Minecraft Wiki|Horse|Horse, donkey, or mule}}, {{change||or {{Minecraft Wiki|Llama}}}}
 
 
  |}
 
  |}
  
=== Shulker box ===
+
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.
<!-- Yes, this image doesn't exist yet; I'll add it later. -->
+
 
[[File:Shulker-box-slots.png|thumb|Shulker box slots]]
+
{{Change||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): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
 +
 
 +
<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
 +
<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
  
This is the window that is opened when the player right-clicks on a shulker box chest.
+
==== Update Light ====
 +
 
 +
Updates light levels for a chunk.
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 +
!colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  ! Slot range
+
  |rowspan="11"| {{change|0x25|0x23}}
  ! Description
+
  |rowspan="11"| Play
 +
|rowspan="11"| Client
 +
|colspan="2"| Chunk X
 +
|colspan="2"| VarInt
 +
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
  |-
  | 0–26
+
  |colspan="2"| Chunk Z
  | box slots
+
|colspan="2"| VarInt
 +
| Chunk coordinate (block coordinate divided by 16, rounded down)
 +
|- {{added}}
 +
|colspan="2"| Trust Edges
 +
|colspan="2"| Boolean
 +
| If edges should be trusted for light updates.
 +
  |
 
  |-
 
  |-
  | 27–53
+
  |colspan="2"| Sky Light Mask
  | main inventory
+
|colspan="2"| VarInt
 +
  | Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
 
  |-
 
  |-
  | 54–62
+
  |colspan="2"| Block Light Mask
| hotbar
+
  |colspan="2"| VarInt
  |}
+
  | Mask containing 18 bits, with the same order as sky light
 
 
{{-}}
 
 
 
=== Llama ===
 
<!-- Again, this image doesn't exist yet -->
 
[[File:Llama-strength5-slots.png|thumb|Llama slots]]
 
 
 
The inventory that appears when a tamed llama is right-clicked and has a chest, or when the player's inventory is opened while riding a tamed llama. Depending on the value of the strength field, the number of chest rows may vary (max is 5, so 15 slots).
 
 
 
{{warning|There still is a saddle slot, even though it cannot be used and is invisible.}}
 
 
 
{{warning|Slot positions within the llama inventory vary - slot 2 may be at (1,0) or at (0,1) depending on the number of columns.}}
 
 
 
{| class="wikitable"
 
 
  |-
 
  |-
  ! Slot range
+
  |colspan="2"| Empty Sky Light Mask
  ! Description
+
  |colspan="2"| VarInt
 +
| Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
 
  |-
 
  |-
  | 0
+
  |colspan="2"| Empty Block Light Mask
  | saddle
+
|colspan="2"| VarInt
 +
  | Mask containing 18 bits, which indicates sections that have 0 for all their block light values.  If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the block light arrays.
 
  |-
 
  |-
  | 1
+
  |rowspan="2"| Sky Light arrays
  | carpet
+
| Length
 +
|rowspan="2"| Array
 +
| VarInt
 +
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | 2-(2+3*Strength)
+
  | Sky Light array
  | llama inventory
+
  | 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.
 
  |-
 
  |-
  | (2+3*Strength)+1-(2+3*Strength)+27
+
  |rowspan="2"| Block Light arrays
  | player inventory
+
| Length
 +
|rowspan="2"| Array
 +
| VarInt
 +
  | Length of the following array in bytes (always 2048)
 
  |-
 
  |-
  | (2+3*Strength)+28-(2+3*Strength)+35
+
  | Block Light array
  | hotbar
+
  | 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.
 
  |}
 
  |}
  
<gallery>
+
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.
File:Llama-unchested-slots.png|Unchested llama
 
File:Llama-strength1-slots.png|Llama with strength 1
 
File:Llama-strength2-slots.png|Llama with strength 2
 
File:Llama-strength3-slots.png|Llama with strength 3
 
File:Llama-strength4-slots.png|Llama with strength 4
 
File:Llama-strength5-slots.png|Llama with strength 5
 
</gallery>
 
 
 
== Block Actions ==
 
 
 
=== Shulker Box ===
 
 
 
Animates the shulker box's shell opening.
 
 
 
==== Action IDs ====
 
 
 
There is only one action: 1, which updates the number of players who are looking in the shulker box.
 
 
 
==== Action param ====
 
 
 
If the action is 1, updates the number of players who have the shulker box open. If 0, the shulker box enters its closing animation; if 1, the shulker box enters its opening animation.
 
 
 
[[Category:Minecraft Modern]]
 
 
 
== Handshaking ==
 
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
  
==== Handshake ====
+
==== Join Game ====
  
This causes the server to switch into the target state.
+
See [[Protocol Encryption]] for information on logging in.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 989: Line 590:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x00
+
  |rowspan="17"| {{change|0x26|0x24}}
  |rowspan="4"| Handshaking
+
  |rowspan="17"| Play
  |rowspan="4"| Server
+
  |rowspan="17"| Client
  | Protocol Version
+
| Entity ID
 +
| Int
 +
| The player's Entity ID (EID)
 +
|-
 +
| Is hardcore
 +
| Boolean
 +
|
 +
|-
 +
| Gamemode
 +
| Unsigned Byte
 +
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. {{change|Bit 3 (0x8) is the hardcore flag.}}
 +
|- {{Added}}
 +
| Previous Gamemode
 +
| Unsigned Byte
 +
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
 +
|- {{Added}}
 +
| World Count
 +
| VarInt
 +
| Size of the following array
 +
|- {{Added}}
 +
| World Names
 +
| Array of Identifier
 +
| Identifiers for all worlds on the server
 +
|- {{Added}}
 +
| Dimension Codec
 +
| [[NBT|NBT Tag Compound]]
 +
| The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
 +
|-
 +
| Dimension
 +
| {{change|Int Enum|[[NBT|NBT Tag Compound]]}}
 +
| {{change|-1: The Nether, 0: The Overworld, 1: The End|Valid dimensions are defined per dimension registry sent before this}}
 +
|- {{Added}}
 +
| World Name
 +
| Identifier
 +
| Name of the world being spawned into
 +
|-
 +
| Hashed seed
 +
| Long
 +
| First 8 bytes of the SHA-256 hash of the world's seed.
 +
|-
 +
| Max Players
 +
| {{change|Unsigned Byte|VarInt}}
 +
| Was once used by the client to draw the player list, but now is ignored
 +
|- {{Removed}}
 +
| Level Type
 +
| String Enum (16)
 +
| default, flat, largeBiomes, amplified, customized, buffet, default_1_1
 +
|-
 +
  | View Distance
 
  | VarInt
 
  | VarInt
  | See [[protocol version numbers]] (currently {{change|210|311}})
+
  | Render distance (2-32)
 
  |-
 
  |-
  | Server Address
+
  | Reduced Debug Info
  | String
+
  | Boolean
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
+
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}For servers in development, this should almost always be false.
|-
 
| Server Port
 
| Unsigned Short
 
| Default is 25565The Notchian server does not use this information.
 
 
  |-
 
  |-
  | Next State
+
  | Enable respawn screen
  | VarInt Enum
+
  | Boolean
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+
  | Set to false when the doImmediateRespawn gamerule is true
 +
|- {{Added}}
 +
| Is Debug
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks
 +
|- {{Added}}
 +
| Is Flat
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63
 
  |}
 
  |}
  
== Play ==
+
{{Need Info|Lay out and explain the format}}
  
=== Clientbound ===
+
'''[https://paste.gg/p/KennyTV/ad46ef552c6443cc808385f060564550 Default Vanilla Dimension/Biome Codec]'''
  
==== Spawn Mob ====
+
Known dimension attributes:
  
Sent by the server when a mob entity is spawned.
+
{| class="wikitable"
 +
! Name
 +
! Type
 +
!style="width: 250px;" colspan="2"| Meaning
 +
! Values
 +
|-
 +
| name
 +
| String
 +
|colspan="2"| Dimension's name
 +
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
 +
|-
 +
| piglin_safe
 +
| Byte
 +
|colspan="2"| Whether piglins shake and transform to zombified piglins.
 +
| 1: true, 0: false
 +
|-
 +
| natural
 +
| Byte
 +
|colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
 +
| 1: true, 0: false
 +
|-
 +
| ambient_light
 +
| Float
 +
|colspan="2"| How much light the dimension has.
 +
| 0.0 to 1.0
 +
|-
 +
| fixed_time
 +
| Long
 +
|colspan="2"| If this is set to a number, the time of the day is the specified value.
 +
| false, or 0 to 24000
 +
|-
 +
| infiniburn
 +
| String
 +
|colspan="2"| A resource location defining what block tag to use for infiniburn.
 +
| "" or minecraft resource "minecraft:..."
 +
|-
 +
| respawn_anchor_works
 +
| Byte
 +
|colspan="2"| Whether players can charge and use respawn anchors.
 +
| 1: true, 0: false
 +
|-
 +
| has_skylight
 +
| Byte
 +
|colspan="2"| Whether the dimension has skylight access or not.
 +
| 1: true, 0: false
 +
|-
 +
| bed_works
 +
| Byte
 +
|colspan="2"| Whether players can use a bed to sleep.
 +
| 1: true, 0: false
 +
|-
 +
| effects
 +
| String
 +
|colspan="2"| ?
 +
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else
 +
|-
 +
| has_raids
 +
| Byte
 +
|colspan="2"| Whether players with the Bad Omen effect can cause a raid.
 +
| 1: true, 0: false
 +
|-
 +
| logical_height
 +
| Int
 +
|colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension.
 +
| 0-256
 +
|-
 +
| coordinate_scale
 +
| Float
 +
|colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 +
| 1: true, 0: false
 +
|-
 +
| ultrawarm
 +
| Byte
 +
|colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
 +
| 1: true, 0: false
 +
|-
 +
| has_ceiling
 +
| Byte
 +
|colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
 +
| 1: true, 0: false
 +
|}
 +
 
 +
==== Unlock Recipes ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,025: Line 760:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="13"| 0x03
+
  |rowspan="14"| {{Change|0x37|0x35}}
  |rowspan="13"| Play
+
  |rowspan="14"| Play
  |rowspan="13"| Client
+
  |rowspan="14"| Client
  | Entity ID
+
  |-
 +
| Action
 
  | VarInt
 
  | VarInt
  |  
+
  | 0: init, 1: add, 2: remove
 
  |-
 
  |-
  | Entity UUID
+
  | Crafting Recipe Book Open
  | UUID
+
  | Boolean
  |  
+
  | If true, then the crafting recipe book will be open when the player opens its inventory.
 
  |-
 
  |-
  | Type
+
  | Crafting Recipe Book Filter Active
  | {{change|Unsigned Byte|VarInt}}
+
  | Boolean
  | The type of mob. See [[Entities#Mobs]]
+
  | If true, then the filtering option is active when the players opens its inventory.
 
  |-
 
  |-
  | X
+
  | Smelting Recipe Book Open
  | Double
+
  | Boolean
  |  
+
  | If true, then the smelting recipe book will be open when the player opens its inventory.
 
  |-
 
  |-
  | Y
+
  | Smelting Recipe Book Filter Active
  | Double
+
  | Boolean
  |  
+
  | If true, then the filtering option is active when the players opens its inventory.
 +
|- {{added}}
 +
| Blast Furance Recipe Book Open
 +
| Boolean
 +
| If true, then the blast furnace recipe book will be open when the player opens its inventory.
 +
|- {{added}}
 +
| Blast Furance Recipe Book Filter Active
 +
| Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 +
|- {{added}}
 +
| Smoker Recipe Book Open
 +
| Boolean
 +
| If true, then the smoker recipe book will be open when the player opens its inventory.
 +
|- {{added}}
 +
| Smoker Recipe Book Filter Active
 +
| Boolean
 +
| If true, then the filtering option is active when the players opens its inventory.
 
  |-
 
  |-
  | Z
+
  | Array size 1
  | Double
+
  | VarInt
  |  
+
  | Number of elements in the following array
 
  |-
 
  |-
  | Yaw
+
  | Recipe IDs
  | Angle
+
  | Array of Identifier
  |  
+
  |
 
  |-
 
  |-
  | Pitch
+
  | Array size 2
  | Angle
+
  | Optional VarInt
  |  
+
  | Number of elements in the following array, only present if mode is 0 (init)
 
  |-
 
  |-
  | Head Pitch
+
  | Recipe IDs
  | Angle
+
  | Optional Array of Identifier, only present if mode is 0 (init)
|
+
  |
|-
 
| Velocity X
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Y
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Z
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Metadata
 
| [[Entities#Entity Metadata Format|Entity Metadata]]
 
  |  
 
 
  |}
 
  |}
 +
Action:
 +
* 0 (init) = All the recipes in the list 2 will added to the recipe book. All the recipes in list 1 will be tagged as displayed, recipes that aren't tagged will be shown in the notification.
 +
* 1 (add) = All the recipes in the list are added and their icon will be shown in the notification.
 +
* 2 (remove) = Remove all the recipes in the list. This allows them to re-displayed when they are readded.
  
==== Update Block Entity ====
+
==== Respawn ====
  
Sets tile entity associated with the block at the given location.
+
To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,093: Line 833:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x09
+
  |rowspan="10"| {{Change|0x3B|0x39}}
  |rowspan="3"| Play
+
  |rowspan="10"| Play
  |rowspan="3"| Client
+
  |rowspan="10"| Client
  | Location
+
  | Dimension
  | Position
+
| {{change|Int Enum|[[NBT|NBT Tag Compound]]}}
  |  
+
| {{change|-1: The Nether, 0: The Overworld, 1: The End|Valid dimensions are defined per dimension registry sent in [[#Join Game|Join Game]]}}
 +
|- {{Added}}
 +
| World Name
 +
  | Identifier
 +
  | Name of the world being spawned into
 
  |-
 
  |-
  | Action
+
  | Hashed seed
 +
| Long
 +
| First 8 bytes of the SHA-256 hash of the world's seed.
 +
|- {{Added}}
 +
| Gamemode
 +
| Unsigned Byte
 +
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
 +
|- {{Added}}
 +
| Previous Gamemode
 
  | Unsigned Byte
 
  | Unsigned Byte
  | The type of update to perform, see below
+
  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
  |-
+
  |- {{Removed}}
  | NBT Data
+
  | Level Type
  | [[NBT|NBT Tag]]
+
  | String (16)
  | 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)
+
| Same as [[#Join Game|Join Game]]
 +
  |- {{Added}}
 +
| Is Debug
 +
| Boolean
 +
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks
 +
|- {{Added}}
 +
| Is Flat
 +
| Boolean
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63
 +
|- {{added}}
 +
| Copy metadata
 +
| Boolean
 +
| If false, metadata is reset on the respawned player entity.  Set to true for dimension changes (including the dimension change triggered by sending client status perform respawn to exit the end poem/credits), and false for normal respawns.
 
  |}
 
  |}
  
''Action'' field:
+
{{Need Info|Does the new World Name field resolve this same-dimension issue?}}
  
* '''1''': Set SpawnPotentials of a mob spawner
+
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
* '''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''': Set type of flower in flower pot
 
* '''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
 
* {{Change||'''10''': Declare a shulker box (unclear if there is any actual data)}}
 
  
==== Tab-Complete (clientbound) ====
+
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.}}
  
The server responds with a list of auto-completions of the last word sent to it. In the case of regular chat, this is a player username. Command names and parameters are also supported. {{change|The client lists these in the order that they are in the array.|The client sorts these alphabetically before listing them.}}
+
==== Multi Block Change ====
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,134: Line 889:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x0E
+
  |rowspan="4"| {{Change|0x10|0x3B}}
  |rowspan="2"| Play
+
  |rowspan="4"| Play
  |rowspan="2"| Client
+
  |rowspan="4"| Client
  | Count
+
  |
 +
| Long
 +
| Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right)
 +
|- {{added}}
 +
|
 +
| Boolean
 +
| Always inverse the preceding Update Light packet's "Trust Edges" bool
 +
|
 +
|-
 +
| Array size
 
  | VarInt
 
  | VarInt
 
  | Number of elements in the following array
 
  | Number of elements in the following array
 
  |-
 
  |-
  | Matches
+
  |  
  | Array of String
+
  | Array of VarLong
  | One eligible command, note that each command is sent separately instead of in a single string, hence the need for Count
+
  | Each entry is composed of the block id, shifted right by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).
 
  |}
 
  |}
  
==== Entity Status ====
+
==== Entity Properties ====
 +
 
 +
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,152: Line 918:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  !colspan="2"| Field Name
  ! Field Type
+
  !colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x1B
+
  |rowspan="6"| {{change|0x59|0x58}}
  |rowspan="2"| Play
+
  |rowspan="6"| Play
  |rowspan="2"| Client
+
  |rowspan="6"| Client
  | Entity ID
+
  |colspan="2"| Entity ID
  | Int
+
  |colspan="2"| VarInt
 
  |  
 
  |  
 
  |-
 
  |-
  | Entity Status
+
  |colspan="2"| Number Of Properties
  | Byte Enum
+
|colspan="2"| Int
 +
| Number of elements in the following array
 +
|-
 +
|rowspan="4"| Property
 +
| Key
 +
|rowspan="4"| Array
 +
| {{Change|String (64)|Identifier}}
 +
| See below
 +
|-
 +
| Value
 +
  | Double
 
  | See below
 
  | See below
 +
|-
 +
| Number Of Modifiers
 +
| VarInt
 +
| Number of elements in the following array
 +
|-
 +
| Modifiers
 +
| Array of Modifier Data
 +
| See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
 +
 +
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  |-
 
  |-
  ! Entity Status
+
  ! Key
  ! Meaning
+
  ! Default
 +
! Min
 +
! Max
 +
! Label
 
  |-
 
  |-
  | 0
+
  | {{change|generic.maxHealth|generic.max_health}}
  | Spawn tipped arrow particle effects
+
| 20.0
 +
| 0.0
 +
| 1024.0
 +
  | Max Health
 
  |-
 
  |-
  | 1
+
  | {{change|generic.followRange|generic.follow_range}}
  | Reset a mob spawner minecart's timer (unused by the client?)
+
| 32.0
 +
| 0.0
 +
| 2048.0
 +
  | Follow Range
 
  |-
 
  |-
  | 1
+
| {{change|generic.knockbackResistance|generic.knockback_resistance}}
  | Create rabbit running particles
+
| 0.0
 +
| 0.0
 +
  | 1.0
 +
  | Knockback Resistance
 
  |-
 
  |-
  | 2
+
  | {{change|generic.movementSpeed|generic.movement_speed}}
  | Entity hurt animation
+
| 0.7
 +
| 0.0
 +
| 1024.0
 +
  | Movement Speed
 
  |-
 
  |-
  | 3
+
  | {{change|generic.attackDamage|generic.attack_damage}}
  | Entity died animation
+
| 2.0
 +
| 0.0
 +
| 2048.0
 +
  | Attack Damage
 
  |-
 
  |-
  | 4
+
| {{change|generic.attackSpeed|generic.attack_speed}}
  | Iron Golem throwing up arms
+
  | 4.0
 +
| 0.0
 +
| 1024.0
 +
  | Attack Speed
 
  |-
 
  |-
  | 6
+
  | {{change|generic.flyingSpeed|generic.flying_speed}}
  | Wolf/Ocelot/Horse taming — Spawn “heart” particles
+
| 0.4
 +
| 0.0
 +
| 1024.0
 +
  | Flying Speed
 
  |-
 
  |-
  | 7
+
  | generic.armor
  | Wolf/Ocelot/Horse tamed — Spawn “smoke” particles
+
  | 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor
 
  |-
 
  |-
  | 8
+
  | {{change|generic.armorToughness|generic.armor_toughness}}
  | Wolf shaking water — Trigger the shaking animation
+
| 0.0
 +
| 0.0
 +
| 20.0
 +
  | Armor Toughness
 
  |-
 
  |-
  | 9
+
  | {{change|generic.attackKnockback|generic.attack_knockback}}
  | Mark item use as finished (ie, eating finished, drinking finished)
+
| 0.0
 +
| 0.0
 +
| 5.0
 +
  | &mdash;
 
  |-
 
  |-
  | 10
+
  | generic.luck
  | Sheep eating grass
+
  | 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck
 
  |-
 
  |-
  | 10
+
  | {{change|horse.jumpStrength|horse.jump_strength}}
  | Ignite TNT minecart
+
| 0.7
 +
| 0.0
 +
| 2.0
 +
  | Jump Strength
 
  |-
 
  |-
  | 11
+
  | {{change|zombie.spawnReinforcements|zombie.spawn_reinforcements}}
  | Iron Golem handing over a rose
+
| 0.0
 +
| 0.0
 +
| 1.0
 +
  | Spawn Reinforcements Chance
 
  |-
 
  |-
  | 12
+
  | generic.reachDistance
  | Villager mating — Spawn “heart” particles
+
  | 5.0
 +
| 0.0
 +
| 1024.0
 +
| Player Reach Distance (Forge only)
 
  |-
 
  |-
  | 13
+
  | forge.swimSpeed
  | Spawn particles indicating that a villager is angry and seeking revenge
+
  | 1.0
 +
| 0.0
 +
| 1024.0
 +
| Swimming Speed (Forge only)
 +
|}
 +
 
 +
Unknown attributes will cause a game crash ([https://bugs.mojang.com/browse/MC-150405 MC-150405]) due to the default minimum being larger than the default value.
 +
 
 +
''Modifier Data'' structure:
 +
 
 +
{| class="wikitable"
 
  |-
 
  |-
  | 14
+
  ! Field Name
  | Spawn happy particles near a villager
+
  ! Field Type
 +
! Notes
 
  |-
 
  |-
  | 15
+
  | UUID
  | Witch animation — Spawn “magic” particles
+
| UUID
 +
  |  
 
  |-
 
  |-
  | 16
+
  | Amount
  | Play zombie converting into a villager sound
+
  | Double
 +
| May be positive or negative
 
  |-
 
  |-
  | 17
+
  | Operation
  | Firework exploding
+
  | Byte
  |-
+
  | See below
| 18
 
| Animal in love (ready to mate) — Spawn “heart” particles
 
|-
 
| 19
 
| Reset squid rotation
 
|-
 
| 20
 
| Spawn explosion particle — works for some living entities
 
|-
 
| 21
 
| Play guardian sound — works for every entity
 
|-
 
| 22
 
| Enables reduced {{Minecraft Wiki|Debug screen|debug}} for the given player
 
|-
 
| 23
 
| Disables reduced {{Minecraft Wiki|Debug screen|debug}} for the given player
 
|-
 
| 24–28
 
| Sets the {{Minecraft Wiki|Server.properties#op-permission-level|op permission level}} 0–4 for the connected player
 
|-
 
| 29
 
| Shield block sound
 
|-
 
| 30
 
| Shield break sound
 
|-
 
| 31
 
| For a fishing rod bobber, if the hooked entity is this player, tug that player toward the caster of the rod
 
|-
 
| 32
 
| Armorstand hit sound
 
|-
 
| 33
 
| Entity hurt due to thorns (play thorns sound, perform normal hurt animation)
 
|-
 
|style="background-color: #d9ead3;"| 35
 
|style="background-color: #d9ead3;"| Plays the Totem of Undying animation
 
 
  |}
 
  |}
  
==== Map ====
+
The operation controls how the base value of the modifier is changed.
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
* 0: Add/subtract amount
 +
* 1: Add/subtract amount percent of the current value
 +
* 2: Multiply by amount percent
 +
 
 +
All of the 0's are applied first, and then the 1's, and then the 2's.
 +
 
 +
==== Declare Recipes ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,282: Line 1,094:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="13"| 0x24
+
  |rowspan="4"| {{change|0x5B|0x5A}}
  |rowspan="13"| Play
+
  |rowspan="4"| Play
  |rowspan="13"| Client
+
  |rowspan="4"| Client
  |colspan="2"| Item Damage
+
  |colspan="2"| Num Recipes
|colspan="2"| VarInt
 
| The damage value (map ID) of the map being modified
 
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|-
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
 
  |colspan="2"| VarInt
 
  |colspan="2"| VarInt
 
  | Number of elements in the following array
 
  | Number of elements in the following array
 
  |-
 
  |-
  |rowspan="3"| Icon
+
  |rowspan="3"| Recipe
  | Direction And Type
+
  | Recipe ID
 
  |rowspan="3"| Array
 
  |rowspan="3"| Array
  | Byte
+
  | Identifier
  | 0xF0 = Direction, 0x0F = Type
+
  |
 +
|-
 +
| Type
 +
| String
 +
| The recipe type, see below
 +
|-
 +
| Data
 +
| Optional, varies
 +
| Additional data for the recipe.  For some types, there will be no data.
 +
|}
 +
 
 +
Recipe types:
 +
 
 +
{| class="wikitable"
 +
! Type
 +
! Description
 +
! Data
 +
|-
 +
| <code>crafting_shapeless</code>
 +
| Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 +
| As follows:
 +
  {| class="wikitable"
 +
    ! Name
 +
    ! Type
 +
    ! Description
 +
    |-
 +
    | Group
 +
    | String
 +
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 +
    |-
 +
    | Ingredient count
 +
    | VarInt
 +
    | Number of elements in the following array
 +
    |-
 +
    | Ingredients
 +
    | Array of Ingredient
 +
    |
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 +
|-
 +
| <code>crafting_shaped</code>
 +
| Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 +
| As follows:
 +
  {| class="wikitable"
 +
    ! Name
 +
    ! Type
 +
    ! Description
 +
    |-
 +
    | Width
 +
    | VarInt
 +
    |
 +
    |-
 +
    | Height
 +
    | VarInt
 +
    |
 +
    |-
 +
    | Group
 +
    | String
 +
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 +
    |-
 +
    | Ingredients
 +
    | Array of Ingredient
 +
    | Length is width * height.  Indexed by x + (y * width).
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 +
|-
 +
| <code>crafting_special_armordye</code>
 +
| Recipe for dying leather armor
 +
|rowspan="13"| None
 
  |-
 
  |-
  | X
+
  | <code>crafting_special_bookcloning</code>
| Byte
+
  | Recipe for copying contents of written books
  |  
 
 
  |-
 
  |-
  | Z
+
  | <code>crafting_special_mapcloning</code>
  | Byte
+
  | Recipe for copying maps
|
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
 
  |-
 
  |-
  |colspan="2"| Rows
+
  | <code>crafting_special_mapextending</code>
|colspan="2"| Optional Byte
+
  | Recipe for adding paper to maps
  | Only if Columns is more than 0; number of rows updated
 
 
  |-
 
  |-
  |colspan="2"| X
+
  | <code>crafting_special_firework_rocket</code>
|colspan="2"| Optional Byte
+
  | Recipe for making firework rockets
  | Only if Columns is more than 0; x offset of the westernmost column
 
 
  |-
 
  |-
  |colspan="2"| Z
+
  | <code>crafting_special_firework_star</code>
|colspan="2"| Optional Byte
+
  | Recipe for making firework stars
  | Only if Columns is more than 0; z offset of the northernmost row
 
 
  |-
 
  |-
  |colspan="2"| Length
+
  | <code>crafting_special_firework_star_fade</code>
|colspan="2"| Optional VarInt
+
  | Recipe for making firework stars fade between multiple colors
  | Only if Columns is more than 0; length of the following array
 
 
  |-
 
  |-
  |colspan="2"| Data
+
  | <code>crafting_special_repairitem</code>
|colspan="2"| Optional Array of Unsigned Byte
+
| Recipe for repairing items via crafting
| 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
+
  | <code>crafting_special_tippedarrow</code>
  ! Result
+
  | Recipe for crafting tipped arrows
 
  |-
 
  |-
  | 0
+
  | <code>crafting_special_bannerduplicate</code>
  | White arrow (players)
+
  | Recipe for copying banner patterns
 
  |-
 
  |-
  | 1
+
  | <code>crafting_special_banneraddpattern</code>
  | Green arrow (item frames)
+
  | Recipe for adding patterns to banners
 
  |-
 
  |-
  | 2
+
  | <code>crafting_special_shielddecoration</code>
  | Red arrow
+
  | Recipe for applying a banner's pattern to a shield
 
  |-
 
  |-
  | 3
+
  | <code>crafting_special_shulkerboxcoloring</code>
  | Blue arrow
+
  | Recipe for recoloring a shulker box
 
  |-
 
  |-
  | 4
+
  | <code>smelting</code>
| White cross
+
| Smelting recipe
 +
|rowspan="4"| 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
 +
    |
 +
    |}
 
  |-
 
  |-
  | 5
+
  | <code>blasting</code>
  | Red pointer
+
  | Blast furnace recipe
 
  |-
 
  |-
  | 6
+
  | <code>smoking</code>
  | White circle (off-map players)
+
  | Smoker recipe
 
  |-
 
  |-
  |style="background-color: #d9ead3;"| 7
+
  | <code>campfire_cooking</code>
  |style="background-color: #d9ead3;"| Small white circle (far-off-map players)
+
  | Campfire recipe
 
  |-
 
  |-
  |style="background-color: #d9ead3;"| 8
+
  | <code>stonecutting</code>
  |style="background-color: #d9ead3;"| Mansion
+
| Stonecutter recipe
 +
| 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
 +
    | Ingredient
 +
    |
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 +
|- {{Added}}
 +
| <code>smithing</code>
 +
| Smithing table recipe
 +
| As follows:
 +
  {| class="wikitable"
 +
    ! Name
 +
    ! Type
 +
    ! Description
 +
    |-
 +
    | Base
 +
    | Ingredient
 +
    | First item
 +
    |-
 +
    | Addition
 +
    | Ingredient
 +
    | Second item
 +
    |-
 +
    | Result
 +
    | [[Slot]]
 +
    |
 +
    |}
 +
  |}
 +
 
 +
Ingredient is defined as:
 +
 
 +
{| class="wikitable"
 +
! Name
 +
! Type
 +
! Description
 
  |-
 
  |-
  |style="background-color: #d9ead3;"| 9
+
  | Count
  |style="background-color: #d9ead3;"| Temple
+
| VarInt
 +
  | Number of elements in the following array
 
  |-
 
  |-
  | 10-15
+
  | Items
  | Unused (blue square)
+
  | Array of [[Slot]]
 +
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
  |}
 
  |}
  
==== Title ====
+
=== Serverbound ===
 +
 
 +
==== Interact Entity ====
 +
 
 +
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
 +
 
 +
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
 +
 
 +
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,389: Line 1,328:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="10"| 0x45
+
  |rowspan="7"| 0x0E
  |rowspan="10"| Play
+
  |rowspan="7"| Play
  |rowspan="10"| Client
+
  |rowspan="7"| Server
  |colspan="2"| Action
+
  | Entity ID
 +
| VarInt
 +
| The ID of the entity to interact
 +
|-
 +
| Type
 
  | VarInt Enum
 
  | VarInt Enum
  |  
+
  | 0: interact, 1: attack, 2: interact at
 
  |-
 
  |-
  ! Action
+
  | Target X
  ! Field Name
+
  | Optional Float
  !
+
  | Only if Type is interact at
!
 
 
  |-
 
  |-
  | 0: set title
+
  | Target Y
  | Title Text
+
  | Optional Float
| [[Chat]]
+
  | Only if Type is interact at
  |  
 
 
  |-
 
  |-
  | 1: set subtitle
+
  | Target Z
  | Subtitle Text
+
  | Optional Float
  | [[Chat]]
+
  | Only if Type is interact at
|
 
|-
 
|style="background-color: #d9ead3;"|2: set action bar
 
|style="background-color: #d9ead3;"|Action bar text
 
|style="background-color: #d9ead3;"|[[Chat]]
 
|style="background-color: #d9ead3;"|Behaves the same as with position 2 in [[#Chat Message (clientbound)|Chat Message (clientbound)]]
 
 
  |-
 
  |-
  |rowspan="3"| {{change|2|3}}: set times and display
+
  | Hand
  | Fade In
+
| Optional VarInt Enum
  | Int
+
| Only if Type is interact or interact at; 0: main hand, 1: off hand
  | Ticks to spend fading in
+
|- {{Added}}
 +
  | Sneaking
 +
| Boolean
 +
  | If the client is sneaking.
 +
  |}
 +
 
 +
==== Generate Structure ====
 +
 
 +
Sent when Generate is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  | Stay
+
  |rowspan="3"| 0x0F
  | Int
+
|rowspan="3"| Play
  | Ticks to keep the title displayed
+
|rowspan="3"| Server
 +
| Location
 +
  | Position
 +
  | Block entity location
 
  |-
 
  |-
  | Fade Out
+
  | Levels
  | Int
+
  | VarInt
  | Ticks to spend out, not when to start fading out
+
  | Value of the levels slider/max depth to generate
 
  |-
 
  |-
  | {{change|3|4}}: hide
+
  | Keep Jigsaws
| ''no fields''
+
  | Boolean
| ''no fields''
+
  |
|
 
|-
 
| {{change|4|5}}: reset
 
| ''no fields''
 
  | ''no fields''
 
  |  
 
 
  |}
 
  |}
  
“Hide” makes the title disappear, but if you run times again the same title will appear. “Reset” erases the text.
+
==== Player Abilities (serverbound) ====
  
The title is visible on screen for Fade In + Stay + Fade Out ticks.
+
{{change|The latter 2 fields are used to indicate the walking and flying speeds respectively, while the first field is used to determine the value of 4 booleans.}}
  
==== Collect Item ====
+
The vanilla client sends this packet when the player starts/stops flying with the Flags parameter changed accordingly. {{change|All other parameters are ignored by the vanilla server.}}
 
 
Sent by the server when someone picks up an item lying on the ground — its sole purpose appears to be the animation of the item flying towards you. It doesn't destroy the entity in the client memory, and it doesn't add it to your inventory. The server only checks for items to be picked up after each [[#Player Position|Player Position]] (and [[#Player Position And Look|Player Position And Look]]) packet sent by the client.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,460: Line 1,406:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x48
+
  |rowspan="3"| {{change|0x19|0x1A}}
 
  |rowspan="3"| Play
 
  |rowspan="3"| Play
  |rowspan="3"| Client
+
  |rowspan="3"| Server
  | Collected Entity ID
+
  | Flags
  | VarInt
+
  | Byte
 +
| Bit mask. {{change|0x08: damage disabled (god mode), 0x04: can fly, }}0x02: is flying{{change|, 0x01: is Creative}}
 +
|- {{removed}}
 +
| Flying Speed
 +
| Float
 +
|
 +
|- {{removed}}
 +
| Walking Speed
 +
| Float
 
  |  
 
  |  
  |-  
+
|}
  | Collector Entity ID
+
 
  | VarInt
+
==== Set Displayed Recipe ====
 +
 
 +
Replaces Recipe Book Data, type 0.
 +
 
 +
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
  |-
 +
  |rowspan="1"| 0x1E
 +
|rowspan="1"| Play
 +
|rowspan="1"| Server
 +
| Recipe ID
 +
  | Identifier
 
  |
 
  |
|-
 
|style="background-color: #d9ead3;"|Pickup Item Count
 
|style="background-color: #d9ead3;"|VarInt
 
|style="background-color: #d9ead3;"|Seems to be 1 for XP orbs, otherwise the number of items in the stack.
 
 
  |}
 
  |}
  
=== Serverbound ===
+
==== Set Recipe Book State ====
 +
 
 +
Replaces Recipe Book Data, type 1.
  
==== Chat Message (serverbound) ====
+
{| class="wikitable" {{Added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="3"| 0x1F
 +
|rowspan="3"| Play
 +
|rowspan="3"| Server
 +
| Book ID
 +
| VarInt enum
 +
| 0: crafting, 1: furnace, 2: blast furnace, 3: smoker
 +
|-
 +
| Book Open
 +
| Boolean
 +
|
 +
|-
 +
| Filter Active
 +
| Boolean
 +
|
 +
|}
  
Used to send a chat message to the server.  The message may not be longer than {{change|100|256}} characters or else the server will kick the client.
+
==== Update Jigsaw Block ====
  
If the message starts with a <code>/</code>, the server will attempt to interpret it as a command.  Otherwise, the server will broadcast the same chat message to all players on the server (including the player that sent the message), prepended with player's name.  Specifically, it will respond with a translate [[chat]] component, "<code>chat.type.text</code>" with the first parameter set to the display name of the player (including some chat component logic to support clicking the name to send a PM) and the second parameter set to the message.
+
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,492: Line 1,482:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| 0x02
+
  |rowspan="7"| {{Change|0x27|0x28}}
  |rowspan="1"| Play
+
  |rowspan="7"| Play
  |rowspan="1"| Server
+
  |rowspan="7"| Server
  | Message
+
  | Location
 +
| Position
 +
| Block entity location
 +
|- {{Removed}}
 +
| Attachment type
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Name
 +
| Identifier
 +
|
 +
|- {{Added}}
 +
| Target
 +
| Identifier
 +
|
 +
|-
 +
| {{Change|Target pool|Pool}}
 +
| Identifier
 +
|
 +
|-
 +
| Final state
 +
| String
 +
| "Turns into" on the GUI, <code>final_state</code> in NBT
 +
|- {{Added}}
 +
| Joint type
 
  | String
 
  | String
  | The client sends the raw input, not a [[Chat]] component
+
  | <code>rollable</code> if the attached piece can be rotated, else <code>aligned</code>
 
  |}
 
  |}
  
==== Player Block Placement ====
+
==== Entity Equipment ====
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
!colspan="2"| Field Name
 +
!colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
 +
|rowspan="5"| 0x47
 +
|rowspan="5"| Play
 +
|rowspan="5"| Client
 +
|colspan="2"| Entity ID
 +
|colspan="2"| VarInt
 +
| Entity's EID
 +
|- {{Removed}}
 +
|colspan="2"| Slot
 +
|colspan="2"| VarInt Enum
 +
| Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
 +
|- {{Removed}}
 +
|colspan="2"| Item
 +
|colspan="2"| [[Slot Data|Slot]]
 +
|
 +
|-
 +
|rowspan="2"| Equipment
 +
| Slot
 +
|rowspan="2"| Array
 +
| Byte Enum
 +
| Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet).  Also has the top bit set if another entry follows, and otherwise unset if this is the last item in the array.
 +
|-
 +
| Item
 +
| [[Slot Data|Slot]]
 +
|
 +
|}
 +
 +
== 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.
 +
 +
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,511: Line 1,570:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| 0x1C
+
  |rowspan="4"| 0x00
  |rowspan="6"| Play
+
  |rowspan="4"| Handshaking
  |rowspan="6"| Server
+
  |rowspan="4"| Server
  | Location
+
  | Protocol Version
  | Position
+
  | VarInt
  | Block position
+
  | See [[protocol version numbers]] (currently {{change|578|753}})
 
  |-
 
  |-
  | Face
+
  | Server Address
  | VarInt Enum
+
  | String
  | The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
+
  | 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.
 
  |-
 
  |-
  | Hand
+
  | Next State
 
  | VarInt Enum
 
  | VarInt Enum
  | The hand from which the block is placed; 0: main hand, 1: off hand
+
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
|-
 
| Cursor Position X
 
| {{change|Unsigned Byte|Float}}
 
| The position of the crosshair on the block, from 0 to 1 increasing from west to east
 
|-
 
| Cursor Position Y
 
| {{change|Unsigned Byte|Float}}
 
| The position of the crosshair on the block, from 0 to 1 increasing from bottom to top
 
|-
 
| Cursor Position Z
 
| {{change|Unsigned Byte|Float}}
 
| The position of the crosshair on the block, from 0 to 1 increasing from north to south
 
 
  |}
 
  |}
  
Line 1,553: Line 1,604:
 
=== Clientbound ===
 
=== Clientbound ===
  
No changes so far.
+
==== Login Success ====
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
|rowspan="2"| 0x02
 +
|rowspan="2"| Login
 +
|rowspan="2"| Client
 +
| UUID
 +
| {{Change|String (36)|UUID}}
 +
| {{Change|Unlike in other packets, this field contains the UUID as a string with hyphens}}.
 +
|-
 +
| Username
 +
| String (16)
 +
|
 +
|}
 +
 
 +
This packet switches the connection state to [[#Play|play]].
  
 
=== Serverbound ===
 
=== Serverbound ===
  
 
No changes so far.
 
No changes so far.
 +
 +
 +
[[Category:Minecraft Modern]]

Latest revision as of 17:11, 10 September 2020

This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 1.16.3, protocol 753). 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

The UUID type is now also sometimes encoded by the Notchian server as an array of four 32-bit integers, from most significant to least significant (matching the new format used on entity NBT). This representation is identical to using 16 bytes, two 64-bit integers, or one 128-bit integers.

Packets

ID Packet name Documentation
Handshaking serverbound
0x00 Handshake Current Pre
Play clientbound
0x02 Spawn Weather Entity Current
0x03 0x02 Spawn Living Entity Current (unchanged)
0x04 0x03 Spawn Painting Current (unchanged)
0x05 0x04 Spawn Player Current (unchanged)
0x06 0x05 Entity Animation (clientbound) Current (unchanged)
0x07 0x06 Statistics Current (unchanged)
0x08 0x07 Acknowledge Player Digging Current (unchanged)
0x09 0x08 Block Break Animation Current (unchanged)
0x0A 0x09 Block Entity Data Current (unchanged)
0x0B 0x0A Block Action Current (unchanged)
0x0C 0x0B Block Change Current (unchanged)
0x0D 0x0C Boss Bar Current (unchanged)
0x0E 0x0D Server Difficulty Current (unchanged)
0x0F 0x0E Chat Message (clientbound) Current Pre
0x11 0x0F Tab-Complete (clientbound) Current (unchanged)
0x12 0x10 Declare Commands Current (unchanged)
0x13 0x11 Window Confirmation (clientbound) Current (unchanged)
0x14 0x12 Close Window (clientbound) Current (unchanged)
0x15 0x13 Window Items Current (unchanged)
0x16 0x14 Window Property Current (unchanged)
0x17 0x15 Set Slot Current (unchanged)
0x18 0x16 Set Cooldown Current (unchanged)
0x19 0x17 Plugin Message (clientbound) Current (unchanged)
0x1A 0x18 Named Sound Effect Current (unchanged)
0x1B 0x19 Disconnect (play) Current (unchanged)
0x1C 0x1A Entity Status Current (unchanged)
0x1D 0x1B Explosion Current (unchanged)
0x1E 0x1C Unload Chunk Current (unchanged)
0x1F 0x1D Change Game State Current (unchanged)
0x20 0x1E Open Horse Window Current (unchanged)
0x21 0x1F Keep Alive (clientbound) Current (unchanged)
0x22 0x20 Chunk Data Current Pre
0x23 0x21 Effect Current (unchanged)
0x24 0x22 Particle Current (unchanged)
0x25 0x23 Update Light Current Pre
0x26 0x24 Join Game Current Pre
0x27 0x25 Map Data Current (unchanged)
0x28 0x26 Trade List Current (unchanged)
0x29 0x27 Entity Position Current (unchanged)
0x2A 0x28 Entity Position and Rotation Current (unchanged)
0x2B 0x29 Entity Rotation Current (unchanged)
0x2C 0x2A Entity Movement Current (unchanged)
0x2D 0x2B Vehicle Move (clientbound) Current (unchanged)
0x2E 0x2C Open Book Current (unchanged)
0x2F 0x2D Open Window Current (unchanged)
0x30 0x2E Open Sign Editor Current (unchanged)
0x31 0x2F Craft Recipe Response Current (unchanged)
0x32 0x30 Player Abilities (clientbound) Current (unchanged)
0x33 0x31 Combat Event Current (unchanged)
0x34 0x32 Player Info Current (unchanged)
0x35 0x33 Face Player Current (unchanged)
0x36 0x34 Player Position And Look (clientbound) Current (unchanged)
0x37 0x35 Unlock Recipes Current Pre
0x38 0x36 Destroy Entities Current (unchanged)
0x39 0x37 Remove Entity Effect Current (unchanged)
0x3A 0x38 Resource Pack Send Current (unchanged)
0x3B 0x39 Respawn Current Pre
0x3C 0x3A Entity Head Look Current (unchanged)
0x10 0x3B Multi Block Change Current Pre
0x3D 0x3C Select Advancement Tab Current (unchanged)
0x3E 0x3D World Border Current (unchanged)
0x3F 0x3E Camera Current (unchanged)
0x40 0x3F Held Item Change (clientbound) Current (unchanged)
0x41 0x40 Update View Position Current (unchanged)
0x42 0x41 Update View Distance Current (unchanged)
0x47 Entity Equipment Current Pre
0x4E 0x42 Spawn Position Current (unchanged)
0x4F 0x4E Time Update Current (unchanged)
0x50 0x4F Title Current (unchanged)
0x51 0x50 Entity Sound Effect Current (unchanged)
0x52 0x51 Sound Effect Current (unchanged)
0x53 0x52 Stop Sound Current (unchanged)
0x54 0x53 Player List Header And Footer Current (unchanged)
0x55 0x54 NBT Query Response Current (unchanged)
0x56 0x55 Collect Item Current (unchanged)
0x57 0x56 Entity Teleport Current (unchanged)
0x58 0x57 Advancements Current (unchanged)
0x59 0x58 Entity Properties Current Pre
0x5A 0x59 Entity Effect Current (unchanged)
0x5B 0x5A Declare Recipes Current Pre
0x5C 0x5B Tags Current (unchanged)
Play serverbound
0x0E Interact Entity Current Pre
0x0F Generate Structure Pre
0x0F 0x10 Keep Alive (serverbound) Current (unchanged)
0x10 0x11 Lock Difficulty Current (unchanged)
0x11 0x12 Player Position Current (unchanged)
0x12 0x13 Player Position And Rotation (serverbound) Current (unchanged)
0x13 0x14 Player Rotation Current (unchanged)
0x14 0x15 Player Movement Current (unchanged)
0x15 0x16 Vehicle Move (serverbound) Current (unchanged)
0x16 0x17 Steer Boat Current (unchanged)
0x17 0x18 Pick Item Current (unchanged)
0x18 0x19 Craft Recipe Request Current (unchanged)
0x19 0x1A Player Abilities (serverbound) Current Pre
0x1A 0x1B Player Digging Current (unchanged)
0x1B 0x1C Entity Action Current (unchanged)
0x1C 0x1D Steer Vehicle Current (unchanged)
0x1D Recipe Book Data Current
0x1E Set Displayed Recipe Pre
0x1F Set Recipe Book State Pre
0x1E 0x20 Name Item Current (unchanged)
0x1F 0x21 Resource Pack Status Current (unchanged)
0x20 0x22 Advancement Tab Current (unchanged)
0x21 0x23 Select Trade Current (unchanged)
0x22 0x24 Set Beacon Effect Current (unchanged)
0x23 0x25 Held Item Change (serverbound) Current (unchanged)
0x24 0x26 Update Command Block Current (unchanged)
0x25 0x27 Update Command Block Minecart Current (unchanged)
0x26 0x28 Creative Inventory Action Current (unchanged)
0x27 0x29 Update Jigsaw Block Current Pre
0x28 0x2A Update Structure Block Current (unchanged)
0x29 0x2B Update Sign Current (unchanged)
0x2A 0x2C Animation (serverbound) Current (unchanged)
0x2B 0x2D Spectate Current (unchanged)
0x2C 0x2E Player Block Placement Current (unchanged)
0x2D 0x2F Use Item Current (unchanged)
Login clientbound
0x02 Login Success Current Pre

New/modified data types

No changes so far.

Entity Metadata

FishingHook

Extends Entity.

Index Type Meaning Default
7 VarInt Hooked entity id + 1, or 0 if there is no hooked entity 0
8 Boolean Is catchable False

Abstract Arrow

Extends Entity.

Abstract base class for Tipped Arrow (which is used for regular arrows as well as tipped ones) and Spectral Arrow.

Index Type Meaning Default
7 Byte Bit mask Meaning 0
0x01 Is critical
0x02 Is noclip (used by loyalty tridents when returning)
8 OptUUID Unused Empty
9 8 Byte Peircing level 0

Tipped Arrow

Extends Abstract Arrow.

Used for both tipped and regular arrows. If not tipped, then color is set to -1 and no tipped arrow particles are used.

Index Type Meaning Default
10 9 VarInt Color (-1 for no particles) -1

Spectral Arrow

Extends Abstract Arrow.

No additional metadata.

Trident

Extends Abstract Arrow.

Index Type Meaning Default
10 9 VarInt Loyalty level (enchantment) 0
11 10 Boolean Has enchantment glint False

Strider

Extends Animal.

Index Type Meaning Default
16 VarInt Total time to "boost" with warped fungus on a stick for 0
17 Boolean Is shaking (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava)) false
18 Boolean Has saddle false

Hoglin

Extends Animal.

Index Type Meaning Default
16 Boolean Is immune to zombification false

Zoglin

Extends Monster.

Index Type Meaning Default
15 Boolean Is baby false

Base Piglin

Extends Monster.

Index Type Meaning Default
15 Boolean Is immune to zombification false

Piglin

Extends Base Piglin.

Index Type Meaning Default
16 Boolean Is baby false
17 Boolean Is charging crossbow false
18 Boolean Is dancing false

Piglin Brute

Extends Base Piglin.

No additional metadata.

Wolf

Extends TameableAnimal.

Index Type Meaning Default
18 Boolean Is begging false
19 VarInt Collar color (values are those used with dyes) 14 (Red)
20 VarInt Anger time 0

Zombie Pigman Zombified Piglin

Extends Zombie.

No additional metadata.

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

Chat Message (clientbound)

Identifying the difference between Chat/System Message is important as it helps respect the user's chat visibility options. See processing chat for more info about these positions.

Warning.png Game info accepts json formatting but does not display it, although the deprecated §-based formatting works. This is not an issue when using the Title packet, so prefer that packet for displaying information in that slot. See MC-119145 for more information.

Packet ID State Bound To Field Name Field Type Notes
0x0F 0x0E Play Client JSON Data Chat Limited to 32767 bytes
Position Byte 0: chat (chat box), 1: system message (chat box), 2: game info (above hotbar).
Sender UUID Used by the Notchian client for the disableChat launch option. Setting both longs to 0 will always display the message regardless of the setting.

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
0x22 0x20 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 length Optional VarInt Size of the following array. Not present if full chunk is false.
Biomes Optional array of Integer VarInt 1024 biome IDs, ordered by x then z then y, in 4×4×4 blocks. Possibly something else. 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.

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
0x25 0x23 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.
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 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.

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.

Join Game

See Protocol Encryption for information on logging in.

Packet ID State Bound To Field Name Field Type Notes
0x26 0x24 Play Client Entity ID Int The player's Entity ID (EID)
Is hardcore Boolean
Gamemode Unsigned Byte 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
Previous Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
World Count VarInt Size of the following array
World Names Array of Identifier Identifiers for all worlds on the server
Dimension Codec NBT Tag Compound The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
Dimension Int Enum NBT Tag Compound -1: The Nether, 0: The Overworld, 1: The End Valid dimensions are defined per dimension registry sent before this
World Name Identifier Name of the world being spawned into
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed.
Max Players Unsigned Byte VarInt 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
Is Debug Boolean True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks
Is Flat Boolean True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63
Huh.png The following information needs to be added to this page:
Lay out and explain the format

Default Vanilla Dimension/Biome Codec

Known dimension attributes:

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

Unlock Recipes

Packet ID State Bound To Field Name Field Type Notes
0x37 0x35 Play Client
Action VarInt 0: init, 1: add, 2: remove
Crafting Recipe Book Open Boolean If true, then the crafting recipe book will be open when the player opens its inventory.
Crafting Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Smelting Recipe Book Open Boolean If true, then the smelting recipe book will be open when the player opens its inventory.
Smelting Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Blast Furance Recipe Book Open Boolean If true, then the blast furnace recipe book will be open when the player opens its inventory.
Blast Furance Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Smoker Recipe Book Open Boolean If true, then the smoker recipe book will be open when the player opens its inventory.
Smoker Recipe Book Filter Active Boolean If true, then the filtering option is active when the players opens its inventory.
Array size 1 VarInt Number of elements in the following array
Recipe IDs Array of Identifier
Array size 2 Optional VarInt Number of elements in the following array, only present if mode is 0 (init)
Recipe IDs Optional Array of Identifier, only present if mode is 0 (init)

Action:

  • 0 (init) = All the recipes in the list 2 will added to the recipe book. All the recipes in list 1 will be tagged as displayed, recipes that aren't tagged will be shown in the notification.
  • 1 (add) = All the recipes in the list are added and their icon will be shown in the notification.
  • 2 (remove) = Remove all the recipes in the list. This allows them to re-displayed when they are readded.

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
0x3B 0x39 Play Client Dimension Int Enum NBT Tag Compound -1: The Nether, 0: The Overworld, 1: The End Valid dimensions are defined per dimension registry sent in Join Game
World Name Identifier Name of the world being spawned into
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed.
Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
Previous Gamemode Unsigned Byte 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. (More information needed)
Level Type String (16) Same as Join Game
Is Debug Boolean True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks
Is Flat Boolean True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63
Copy metadata Boolean If false, metadata is reset on the respawned player entity. Set to true for dimension changes (including the dimension change triggered by sending client status perform respawn to exit the end poem/credits), and false for normal respawns.
Huh.png The following information needs to be added to this page:
Does the new World Name field resolve this same-dimension issue?

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.

Multi Block Change

Packet ID State Bound To Field Name Field Type Notes
0x10 0x3B Play Client Long Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right)
Boolean Always inverse the preceding Update Light packet's "Trust Edges" bool
Array size VarInt Number of elements in the following array
Array of VarLong Each entry is composed of the block id, shifted right by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).

Entity Properties

Sets attributes on the given entity.

Packet ID State Bound To Field Name Field Type Notes
0x59 0x58 Play Client Entity ID VarInt
Number Of Properties Int Number of elements in the following array
Property Key Array String (64) Identifier See below
Value Double See below
Number Of Modifiers VarInt Number of elements in the following array
Modifiers Array of Modifier Data See Attribute#Modifiers. Modifier Data defined below.

Known Key values (see also Attribute#Modifiers):

Key Default Min Max Label
generic.maxHealth generic.max_health 20.0 0.0 1024.0 Max Health
generic.followRange generic.follow_range 32.0 0.0 2048.0 Follow Range
generic.knockbackResistance generic.knockback_resistance 0.0 0.0 1.0 Knockback Resistance
generic.movementSpeed generic.movement_speed 0.7 0.0 1024.0 Movement Speed
generic.attackDamage generic.attack_damage 2.0 0.0 2048.0 Attack Damage
generic.attackSpeed generic.attack_speed 4.0 0.0 1024.0 Attack Speed
generic.flyingSpeed generic.flying_speed 0.4 0.0 1024.0 Flying Speed
generic.armor 0.0 0.0 30.0 Armor
generic.armorToughness generic.armor_toughness 0.0 0.0 20.0 Armor Toughness
generic.attackKnockback generic.attack_knockback 0.0 0.0 5.0
generic.luck 0.0 -1024.0 1024.0 Luck
horse.jumpStrength horse.jump_strength 0.7 0.0 2.0 Jump Strength
zombie.spawnReinforcements zombie.spawn_reinforcements 0.0 0.0 1.0 Spawn Reinforcements Chance
generic.reachDistance 5.0 0.0 1024.0 Player Reach Distance (Forge only)
forge.swimSpeed 1.0 0.0 1024.0 Swimming Speed (Forge only)

Unknown attributes will cause a game crash (MC-150405) due to the default minimum being larger than the default value.

Modifier Data structure:

Field Name Field Type Notes
UUID UUID
Amount Double May be positive or negative
Operation Byte See below

The operation controls how the base value of the modifier is changed.

  • 0: Add/subtract amount
  • 1: Add/subtract amount percent of the current value
  • 2: Multiply by amount percent

All of the 0's are applied first, and then the 1's, and then the 2's.

Declare Recipes

Packet ID State Bound To Field Name Field Type Notes
0x5B 0x5A Play Client Num Recipes VarInt Number of elements in the following array
Recipe Recipe ID Array Identifier
Type String The recipe type, see below
Data Optional, varies Additional data for the recipe. For some types, there will be no data.

Recipe types:

Type Description Data
crafting_shapeless Shapeless crafting recipe. All items in the ingredient list must be present, but in any order/slot. As follows:
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
crafting_shaped Shaped crafting recipe. All items must be present in the same pattern (which may be flipped horizontally or translated) As follows:
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
crafting_special_armordye Recipe for dying leather armor None
crafting_special_bookcloning Recipe for copying contents of written books
crafting_special_mapcloning Recipe for copying maps
crafting_special_mapextending Recipe for adding paper to maps
crafting_special_firework_rocket Recipe for making firework rockets
crafting_special_firework_star Recipe for making firework stars
crafting_special_firework_star_fade Recipe for making firework stars fade between multiple colors
crafting_special_repairitem Recipe for repairing items via crafting
crafting_special_tippedarrow Recipe for crafting tipped arrows
crafting_special_bannerduplicate Recipe for copying banner patterns
crafting_special_banneraddpattern Recipe for adding patterns to banners
crafting_special_shielddecoration Recipe for applying a banner's pattern to a shield
crafting_special_shulkerboxcoloring Recipe for recoloring a shulker box
smelting Smelting recipe As follows:
Name Type Description
Group String Used to group similar recipes together in the recipe book.
Ingredient Ingredient
Result Slot
Experience Float
Cooking time VarInt
blasting Blast furnace recipe
smoking Smoker recipe
campfire_cooking Campfire recipe
stonecutting Stonecutter recipe As follows:
Name Type Description
Group String Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
Ingredient Ingredient
Result Slot
smithing Smithing table recipe As follows:
Name Type Description
Base Ingredient First item
Addition Ingredient Second item
Result Slot

Ingredient is defined as:

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.

Serverbound

Interact Entity

This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).

A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.

Note that middle-click in creative mode is interpreted by the client and sent as a Creative Inventory Action packet instead.

Packet ID State Bound To Field Name Field Type Notes
0x0E Play Server Entity ID VarInt The ID of the entity to interact
Type VarInt Enum 0: interact, 1: attack, 2: interact at
Target X Optional Float Only if Type is interact at
Target Y Optional Float Only if Type is interact at
Target Z Optional Float Only if Type is interact at
Hand Optional VarInt Enum Only if Type is interact or interact at; 0: main hand, 1: off hand
Sneaking Boolean If the client is sneaking.

Generate Structure

Sent when Generate is pressed on the Jigsaw Block interface.

Packet ID State Bound To Field Name Field Type Notes
0x0F Play Server Location Position Block entity location
Levels VarInt Value of the levels slider/max depth to generate
Keep Jigsaws Boolean

Player Abilities (serverbound)

The latter 2 fields are used to indicate the walking and flying speeds respectively, while the first field is used to determine the value of 4 booleans.

The vanilla client sends this packet when the player starts/stops flying with the Flags parameter changed accordingly. All other parameters are ignored by the vanilla server.

Packet ID State Bound To Field Name Field Type Notes
0x19 0x1A Play Server Flags Byte Bit mask. 0x08: damage disabled (god mode), 0x04: can fly, 0x02: is flying, 0x01: is Creative
Flying Speed Float
Walking Speed Float

Set Displayed Recipe

Replaces Recipe Book Data, type 0.

Packet ID State Bound To Field Name Field Type Notes
0x1E Play Server Recipe ID Identifier

Set Recipe Book State

Replaces Recipe Book Data, type 1.

Packet ID State Bound To Field Name Field Type Notes
0x1F Play Server Book ID VarInt enum 0: crafting, 1: furnace, 2: blast furnace, 3: smoker
Book Open Boolean
Filter Active Boolean

Update Jigsaw Block

Sent when Done is pressed on the Jigsaw Block interface.

Packet ID State Bound To Field Name Field Type Notes
0x27 0x28 Play Server Location Position Block entity location
Attachment type Identifier
Name Identifier
Target Identifier
Target pool Pool Identifier
Final state String "Turns into" on the GUI, final_state in NBT
Joint type String rollable if the attached piece can be rotated, else aligned

Entity Equipment

Packet ID State Bound To Field Name Field Type Notes
0x47 Play Client Entity ID VarInt Entity's EID
Slot VarInt Enum Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
Item Slot
Equipment Slot Array Byte Enum Equipment slot. 0: main hand, 1: off hand, 2–5: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet). Also has the top bit set if another entry follows, and otherwise unset if this is the last item in the array.
Item Slot

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 578 753)
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

Login Success

Packet ID State Bound To Field Name Field Type Notes
0x02 Login Client UUID String (36) UUID Unlike in other packets, this field contains the UUID as a string with hyphens.
Username String (16)

This packet switches the connection state to play.

Serverbound

No changes so far.