Difference between revisions of "Pre-release protocol"
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− | This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.15.2, protocol 578]]) to the current pre-release (currently [[Protocol version numbers| | + | 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|20w14a, protocol 710]]). 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 === | ||
− | + | 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 === | ||
Line 20: | Line 20: | ||
!colspan="4"| Handshaking serverbound | !colspan="4"| Handshaking serverbound | ||
{{PacketList|0x00|Handshake}} | {{PacketList|0x00|Handshake}} | ||
+ | |- | ||
+ | !colspan="4"| Play clientbound | ||
+ | {{PacketList|{{Change|0x4E|0x43}}|Spawn Position|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x43|0x44}}|Display Scoreboard|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x44|0x45}}|Entity Metadata|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x45|0x46}}|Attach Entity|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x46|0x47}}|Entity Velocity|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x47|0x48}}|Entity Equipment|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x48|0x49}}|Set Experience|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x49|0x4A}}|Update Health|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x4A|0x4B}}|Scoreboard Objective|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x4B|0x4C}}|Set Passengers|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x4C|0x4D}}|Teams|pre=unchanged}} | ||
+ | {{PacketList|{{Change|0x4D|0x4E}}|Update Score|pre=unchanged}} | ||
+ | {{PacketList|0x59|Entity Properties}} | ||
+ | |- | ||
+ | !colspan="4"| Play serverbound | ||
+ | {{PacketList|0x27|Update Jigsaw Block}} | ||
+ | |- | ||
+ | !colspan="4"| Login clientbound | ||
+ | {{PacketList|0x02|Login Success}} | ||
|} | |} | ||
Line 29: | Line 50: | ||
{{#vardefine:meta_prerelease|1}} | {{#vardefine:meta_prerelease|1}} | ||
+ | |||
+ | === FishingHook === | ||
+ | |||
+ | {{Metadata inherit|FishingHook|inherits=Entity|start_at=7}} | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | VarInt | ||
+ | |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 | ||
+ | |} | ||
+ | |||
+ | === Abstract Arrow === | ||
+ | |||
+ | {{Metadata inherit|Abstract Arrow|inherits=Entity|start_at=7}} | ||
+ | |||
+ | 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" | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | rowspan="3" | {{Metadata id|}} | ||
+ | | rowspan="3" | Byte | ||
+ | ! Bit mask | ||
+ | ! Meaning | ||
+ | | rowspan="3" | 0 | ||
+ | |- | ||
+ | | 0x01 | ||
+ | | 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 | ||
+ | |} | ||
+ | |||
+ | === Tipped Arrow === | ||
+ | |||
+ | {{Metadata inherit|Tipped Arrow|inherits=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. | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | VarInt | ||
+ | |colspan="2"| Color (-1 for no particles) | ||
+ | | -1 | ||
+ | |} | ||
+ | |||
+ | === Spectral Arrow === | ||
+ | |||
+ | {{Metadata inherit|Spectral Arrow|inherits=Abstract Arrow}} | ||
+ | |||
+ | No additional metadata. | ||
+ | |||
+ | === Trident === | ||
+ | |||
+ | {{Metadata inherit|Trident|inherits=Abstract Arrow}} | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | VarInt | ||
+ | |colspan="2"| Loyalty level (enchantment) | ||
+ | | 0 | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| Has enchantment glint | ||
+ | | False | ||
+ | |} | ||
+ | |||
+ | === Strider === | ||
+ | |||
+ | {{Metadata inherit|Strider|inherits=Animal|start_at=16}} | ||
+ | |||
+ | {| class="wikitable" {{added}} | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | VarInt | ||
+ | |colspan="2"| Total time to "boost" with warped fungus on a stick for | ||
+ | | 0 | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| Should display name tag (true unless riding a vehicle or on or in a block tagged with strider_warm_blocks (default: lava)) | ||
+ | | false | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| Has saddle | ||
+ | | false | ||
+ | |} | ||
=== Hoglin === | === Hoglin === | ||
− | {{Metadata inherit| | + | {{Metadata inherit|Hoglin|inherits=Animal|start_at=16}} |
+ | |||
+ | {| class="wikitable" {{added}} | ||
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| ? | ||
+ | | False | ||
+ | |} | ||
+ | |||
+ | === Zoglin === | ||
+ | |||
+ | {{Metadata inherit|Hoglin|inherits=Monster|start_at=15}} | ||
− | + | {| class="wikitable" {{added}} | |
+ | ! Index | ||
+ | ! Type | ||
+ | !style="width: 250px;" colspan="2"| Meaning | ||
+ | ! Default | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| ? | ||
+ | | False | ||
+ | |} | ||
=== Piglin === | === Piglin === | ||
− | {{Metadata inherit| | + | {{Metadata inherit|Piglin|inherits=Monster|start_at=15}} |
− | {| class="wikitable" | + | {| class="wikitable" {{added}} |
! Index | ! Index | ||
! Type | ! Type | ||
Line 49: | Line 223: | ||
| Boolean | | Boolean | ||
|colspan="2"| Is baby | |colspan="2"| Is baby | ||
+ | | false | ||
+ | |- | ||
+ | | {{Metadata id|}} | ||
+ | | Boolean | ||
+ | |colspan="2"| Is immune to zombification | ||
| false | | false | ||
|- | |- | ||
Line 56: | Line 235: | ||
| false | | false | ||
|} | |} | ||
+ | |||
+ | === {{Change|Zombie Pigman|Zombified Piglin}} === | ||
+ | |||
+ | {{Metadata inherit|{{Change|Zombie Pigman|Zombified Piglin}}|inherits=Zombie|start_at=18}} | ||
+ | |||
+ | No additional metadata. | ||
== Block Actions == | == Block Actions == | ||
Line 73: | Line 258: | ||
=== Clientbound === | === Clientbound === | ||
− | + | ==== Entity Properties ==== | |
+ | |||
+ | Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity. | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Packet ID | ||
+ | ! State | ||
+ | ! Bound To | ||
+ | !colspan="2"| Field Name | ||
+ | !colspan="2"| Field Type | ||
+ | ! Notes | ||
+ | |- | ||
+ | |rowspan="6"| 0x59 | ||
+ | |rowspan="6"| Play | ||
+ | |rowspan="6"| Client | ||
+ | |colspan="2"| Entity ID | ||
+ | |colspan="2"| VarInt | ||
+ | | | ||
+ | |- | ||
+ | |colspan="2"| Number Of Properties | ||
+ | |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 | ||
+ | |- | ||
+ | | 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" | ||
+ | |- | ||
+ | ! Key | ||
+ | ! Default | ||
+ | ! Min | ||
+ | ! Max | ||
+ | ! Label | ||
+ | |- | ||
+ | | {{change|generic.maxHealth|generic.max_health}} | ||
+ | | 20.0 | ||
+ | | 0.0 | ||
+ | | 1024.0 | ||
+ | | Max Health | ||
+ | |- | ||
+ | | {{change|generic.followRange|generic.follow_range}} | ||
+ | | 32.0 | ||
+ | | 0.0 | ||
+ | | 2048.0 | ||
+ | | Follow Range | ||
+ | |- | ||
+ | | {{change|generic.knockbackResistance|generic.knockback_resistance}} | ||
+ | | 0.0 | ||
+ | | 0.0 | ||
+ | | 1.0 | ||
+ | | Knockback Resistance | ||
+ | |- | ||
+ | | {{change|generic.movementSpeed|generic.movement_speed}} | ||
+ | | 0.7 | ||
+ | | 0.0 | ||
+ | | 1024.0 | ||
+ | | Movement Speed | ||
+ | |- | ||
+ | | {{change|generic.attackDamage|generic.attack_damage}} | ||
+ | | 2.0 | ||
+ | | 0.0 | ||
+ | | 2048.0 | ||
+ | | Attack Damage | ||
+ | |- | ||
+ | | {{change|generic.attackSpeed|generic.attack_speed}} | ||
+ | | 4.0 | ||
+ | | 0.0 | ||
+ | | 1024.0 | ||
+ | | Attack Speed | ||
+ | |- | ||
+ | | {{change|generic.flyingSpeed|generic.flying_speed}} | ||
+ | | 0.4 | ||
+ | | 0.0 | ||
+ | | 1024.0 | ||
+ | | Flying Speed | ||
+ | |- | ||
+ | | generic.armor | ||
+ | | 0.0 | ||
+ | | 0.0 | ||
+ | | 30.0 | ||
+ | | Armor | ||
+ | |- | ||
+ | | {{change|generic.armorToughness|generic.armor_toughness}} | ||
+ | | 0.0 | ||
+ | | 0.0 | ||
+ | | 20.0 | ||
+ | | Armor Toughness | ||
+ | |- | ||
+ | | {{change|generic.attackKnockback|generic.attack_knockback}} | ||
+ | | 0.0 | ||
+ | | 0.0 | ||
+ | | 5.0 | ||
+ | | — | ||
+ | |- | ||
+ | | generic.luck | ||
+ | | 0.0 | ||
+ | | -1024.0 | ||
+ | | 1024.0 | ||
+ | | Luck | ||
+ | |- | ||
+ | | {{change|horse.jumpStrength|horse.jump_strength}} | ||
+ | | 0.7 | ||
+ | | 0.0 | ||
+ | | 2.0 | ||
+ | | Jump Strength | ||
+ | |- | ||
+ | | {{change|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 ([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" | ||
+ | |- | ||
+ | ! 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. | ||
=== Serverbound === | === Serverbound === | ||
− | + | ==== Update Jigsaw Block ==== | |
+ | |||
+ | Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface. | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Packet ID | ||
+ | ! State | ||
+ | ! Bound To | ||
+ | ! Field Name | ||
+ | ! Field Type | ||
+ | ! Notes | ||
+ | |- | ||
+ | |rowspan="7"| 0x27 | ||
+ | |rowspan="7"| Play | ||
+ | |rowspan="7"| Server | ||
+ | | 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 | ||
+ | | <code>rollable</code> if the attached piece can be rotated, else <code>aligned</code> | ||
+ | |} | ||
== Handshaking == | == Handshaking == | ||
Line 104: | Line 503: | ||
| Protocol Version | | Protocol Version | ||
| VarInt | | VarInt | ||
− | | See [[protocol version numbers]] (currently {{change|578| | + | | See [[protocol version numbers]] (currently {{change|578|710}}) |
|- | |- | ||
| Server Address | | Server Address | ||
Line 133: | Line 532: | ||
=== Clientbound === | === Clientbound === | ||
− | + | ==== 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 === |
Revision as of 18:19, 2 April 2020
This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 20w14a, protocol 710). 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 | |||
Spawn Position | Current | (unchanged) | |
Display Scoreboard | Current | (unchanged) | |
Entity Metadata | Current | (unchanged) | |
Attach Entity | Current | (unchanged) | |
Entity Velocity | Current | (unchanged) | |
Entity Equipment | Current | (unchanged) | |
Set Experience | Current | (unchanged) | |
Update Health | Current | (unchanged) | |
Scoreboard Objective | Current | (unchanged) | |
Set Passengers | Current | (unchanged) | |
Teams | Current | (unchanged) | |
Update Score | Current | (unchanged) | |
0x59 | Entity Properties | Current | Pre |
Play serverbound | |||
0x27 | Update Jigsaw Block | Current | Pre |
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) | |||
OptUUID | Unused | Empty | ||
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 | |
---|---|---|---|---|
VarInt | Color (-1 for no particles) | -1 |
Spectral Arrow
Extends Abstract Arrow.
No additional metadata.
Trident
Extends Abstract Arrow.
Index | Type | Meaning | Default | |
---|---|---|---|---|
VarInt | Loyalty level (enchantment) | 0 | ||
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 | Should display name tag (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 | ? | False |
Zoglin
Extends Monster.
Index | Type | Meaning | Default | |
---|---|---|---|---|
15 | Boolean | ? | False |
Piglin
Extends Monster.
Index | Type | Meaning | Default | |
---|---|---|---|---|
15 | Boolean | Is baby | false | |
16 | Boolean | Is immune to zombification | false | |
17 | Boolean | Is charging crossbow | false |
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
Entity Properties
Sets attributes on the given entity.
Packet ID | State | Bound To | Field Name | Field Type | Notes | ||
---|---|---|---|---|---|---|---|
0x59 | Play | Client | Entity ID | VarInt | |||
Number Of Properties | Int | Number of elements in the following array | |||||
Property | Key | Array | 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 |
---|---|---|---|---|
20.0 | 0.0 | 1024.0 | Max Health | |
32.0 | 0.0 | 2048.0 | Follow Range | |
0.0 | 0.0 | 1.0 | Knockback Resistance | |
0.7 | 0.0 | 1024.0 | Movement Speed | |
2.0 | 0.0 | 2048.0 | Attack Damage | |
4.0 | 0.0 | 1024.0 | Attack Speed | |
0.4 | 0.0 | 1024.0 | Flying Speed | |
generic.armor | 0.0 | 0.0 | 30.0 | Armor |
0.0 | 0.0 | 20.0 | Armor Toughness | |
0.0 | 0.0 | 5.0 | — | |
generic.luck | 0.0 | -1024.0 | 1024.0 | Luck |
0.7 | 0.0 | 2.0 | Jump Strength | |
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.
Serverbound
Update Jigsaw Block
Sent when Done is pressed on the Jigsaw Block interface.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x27 | Play | Server | Location | Position | Block entity location |
Attachment type | Identifier | ||||
Name | Identifier | ||||
Target | Identifier | ||||
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
|
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 |
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 | ||
Username | String (16) |
This packet switches the connection state to play.
Serverbound
No changes so far.