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Yash ShroffYash Shroff
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Protocol for r/21 NetworkProtocolVersion 685
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README.md

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We share our Network Protocol with server partners so they can write their own Minecraft servers with their own code. This documentation compiles a series of tree diagrams that define the structure of the packets used by the Protocol, as well as related classes and enums.
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Protocol is subject to change release over release.
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Current Release - r/20_u8
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Current Release - r/21

changelog_685_04_29_24.md

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# Minecraft Network Protocol Docs 04/29/2024
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For r21, Network Protocol Version 685
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## New Packets
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AwardAchievementPacket
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* Added mAchievementID (int)
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## Packet Changes
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CodeBuilderSourcePacket:
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* Removed mValue
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* Added mCodeStatus (enum CodeBuilderExecutionState::CodeStatus) [Details below]
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LegacyTelemetryEventPacket:
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* Added new branch case for enum conditional "Event Type": Type::ItemUsedEvent and subsequent data:
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- Added mEventData.ItemUsedEvent.mItemId (short)
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- Added mEventData.ItemUsedEvent.mItemAux (int)
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- Added mEventData.ItemUsedEvent.mUseMethod (int)
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- Added mEventData.ItemUsedEvent.mCount (int)
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ShapedRecipe:
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* Added recipe.getUnlockingRequirement() (RecipeUnlockingRequirement) [Details below]
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ShapelessRecipe:
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* Added recipe.getUnlockingRequirement() (RecipeUnlockingRequirement) [Details below]
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UpdateSubChunkBlocksPacket
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* Changed mBlocksChanged.mStandards from NetworkBlockInfo::NetworkBlockInfo to struct UpdateSubChunkNetworkBlockInfo [Member variables are the same]
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* Changed mBlocksChanged.mExtras from NetworkBlockInfo::NetworkBlockInfo to struct UpdateSubChunkNetworkBlockInfo [Member variables are the same]
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## Packet Fixes
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SetScorePacket:
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* Moved data.mIdentityType outside of conditional "Is Change Type"
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## Deprecated Packets
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TickSyncPacket (TickSync_deprecated)
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## New Files
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RecipeUnlockingRequirement
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* Added requirement.getUnlockingContext() (enum RecipeUnlockingRequirement::UnlockingContext) [Details below]
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* Added branching condition: requirement.getUnlockingContext() == RecipeUnlockingRequirement::UnlockingContext::None
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- If true:
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- Added vector list requirement.getUnlockingIngredients() (std::vector<RecipeIngredient>)
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- Added ingredient (RecipeIngredient)
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## New Enums
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CodeBuilderExecutionState::CodeStatus:
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* Added None(0)
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* Added NotStarted(1)
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* Added InProgress(2)
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* Added Paused(3)
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* Added Error(4)
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* Added Succeeded(5)
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RecipeUnlockingRequirement::UnlockingContext:
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* Added None(0)
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* Added AlwaysUnlocked(1)
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* Added PlayerInWater(2)
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* Added PlayerHasManyItems(3)
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## Enum Changes
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ActorDataIDs:
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* Added RESERVED_009(9)
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* Added DATA_SPAWN_TIME_deprecated(96)
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* Added VISIBLE_MOB_EFFECTS(131)
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* Changed Count from 131 to 132
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* Removed EFFECT_AMBIENCE
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* Removed DATA_SPAWN_TIME
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ActorType:
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* Displaced Bogged
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* Added OminousItemSpawner(145)
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CommandRegistry::HardNonTerminal:
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* Added CodeBuilderArg(0x100058)
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* Added CodeBuilderArgs(0x100059)
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* Added CodeBuilderSelectParam(0x10005a)
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* Added CodeBuilderSelector(0x10005b)
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Connection::DisconnectFailReason:
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* Added RealmsSessionNotFound_DEPRECATED(89)
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* Removed RealmsSessionNotFound
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Enchant::Type:
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* Added WindBurst(38)
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* Added Density(39)
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* Added Breach(40)
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* Displaced NumEnchantments
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* Displaced InvalidEnchantment
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ItemUseMethod:
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* Added OpenedVault(16)
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* Displaced _Count
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LegacyTelemetryEventPacket::Type:
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* Added ItemUsedEvent(31)
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LevelEvent:
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* Added 9800(3619)
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* Added ParticlesTrialSpawnerDetectionCharged(3615)
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* Added ParticlesTrialSpawnerBecomeCharged(3616)
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* Changed AllPlayersSleeping from 3615 to 3617
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* Changed deprecated from 3616 to 3618
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* Added AnimationSpawnCobweb(9814)
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* Added ParticleSmashAttackGroundDust(9815)
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MinecraftPacketIds:
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* Added TickSync_deprecated(23)
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* Added AwardAchievementPacket(309)
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* Changed EndId from 309 to 310
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* Removed TickSync
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ParticleType:
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* Added OminousItemSpawner(93)
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* Displaced _count
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PlayerAuthInputPacket::InputData:
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* Added NorthJump_DEPRECATED(2)
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* Added BlockBreakingDelayEnabled(48)
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* Changed INPUT_NUM from 48 to 49
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* Removed NorthJump

dot/AwardAchievementPacket.dot

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digraph "AwardAchievementPacket" {
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rankdir = LR
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0
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0 -> 1
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1 -> 2
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0 [label="AwardAchievementPacket",comment="name: \"AwardAchievementPacket\", typeName: \"\", id: 0, branchId: 309, recurseId: -1, attributes: 0, notes: \"\""];
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1 [label="AchievementID",comment="name: \"AchievementID\", typeName: \"\", id: 1, branchId: 0, recurseId: -1, attributes: 0, notes: \"Achievement ID\""];
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2 [label="int",comment="name: \"int\", typeName: \"\", id: 2, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2}
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}

dot/CodeBuilderSourcePacket.dot

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2 [label="byte",comment="name: \"byte\", typeName: \"\", id: 2, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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4 [label="byte",comment="name: \"byte\", typeName: \"\", id: 4, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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5 [label="Value",comment="name: \"Value\", typeName: \"\", id: 5, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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6 [label="string",comment="name: \"string\", typeName: \"\", id: 6, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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5 [label="CodeStatus",comment="name: \"CodeStatus\", typeName: \"\", id: 5, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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6 [label="byte",comment="name: \"byte\", typeName: \"\", id: 6, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2;4;6}
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}

dot/ContainerClosePacket.dot

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1 -> 2
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0 -> 3
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3 -> 4
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0 [label="ContainerClosePacket",comment="name: \"ContainerClosePacket\", typeName: \"\", id: 0, branchId: 47, recurseId: -1, attributes: 0, notes: \"\""];
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1 [label="Container ID",comment="name: \"Container ID\", typeName: \"\", id: 1, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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2 [label="byte",comment="name: \"byte\", typeName: \"\", id: 2, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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3 [label="Server Initiated Close",comment="name: \"Server Initiated Close\", typeName: \"\", id: 3, branchId: 0, recurseId: -1, attributes: 0, notes: \"True if the server initiated the closing\""];
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4 [label="bool",comment="name: \"bool\", typeName: \"\", id: 4, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2;4}
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3 [label="Container Type",comment="name: \"Container Type\", typeName: \"\", id: 3, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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4 [label="byte",comment="name: \"byte\", typeName: \"\", id: 4, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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5 [label="Server Initiated Close",comment="name: \"Server Initiated Close\", typeName: \"\", id: 5, branchId: 0, recurseId: -1, attributes: 0, notes: \"True if the server initiated the closing\""];
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6 [label="bool",comment="name: \"bool\", typeName: \"\", id: 6, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2;4;6}
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}

dot/ItemData.dot

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digraph "ItemData" {
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rankdir = LR
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174 [label="ItemData",comment="name: \"ItemData\", typeName: \"\", id: 174, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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175 [label="Item Name",comment="name: \"Item Name\", typeName: \"\", id: 175, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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176 [label="string",comment="name: \"string\", typeName: \"\", id: 176, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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177 [label="Item Id",comment="name: \"Item Id\", typeName: \"\", id: 177, branchId: 0, recurseId: -1, attributes: 0, notes: \"Block id's < 256 (can be negative); Item id's > 257\""];
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178 [label="short",comment="name: \"short\", typeName: \"\", id: 178, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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179 [label="Is Component Based",comment="name: \"Is Component Based\", typeName: \"\", id: 179, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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180 [label="bool",comment="name: \"bool\", typeName: \"\", id: 180, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;176;178;180}
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180 [label="ItemData",comment="name: \"ItemData\", typeName: \"\", id: 180, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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181 [label="Item Name",comment="name: \"Item Name\", typeName: \"\", id: 181, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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182 [label="string",comment="name: \"string\", typeName: \"\", id: 182, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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183 [label="Item Id",comment="name: \"Item Id\", typeName: \"\", id: 183, branchId: 0, recurseId: -1, attributes: 0, notes: \"Block id's < 256 (can be negative); Item id's > 257\""];
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184 [label="short",comment="name: \"short\", typeName: \"\", id: 184, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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185 [label="Is Component Based",comment="name: \"Is Component Based\", typeName: \"\", id: 185, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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186 [label="bool",comment="name: \"bool\", typeName: \"\", id: 186, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;182;184;186}
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}

dot/LegacyTelemetryEventPacket.dot

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0 [label="LegacyTelemetryEventPacket",comment="name: \"LegacyTelemetryEventPacket\", typeName: \"\", id: 0, branchId: 65, recurseId: -1, attributes: 0, notes: \"\""];
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1 [label="Target Actor ID",comment="name: \"Target Actor ID\", typeName: \"ActorUniqueID\", id: 1, branchId: 0, recurseId: -1, attributes: 256, notes: \"\""];
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152 [label="[No Data]",comment="name: \"[No Data]\", typeName: \"\", id: 152, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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153 [label="if (30)",shape=diamond,comment="name: \"if (30)\", typeName: \"\", id: 153, branchId: 30, recurseId: -1, attributes: 4, notes: \"\""];
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154 [label="[No Data]",comment="name: \"[No Data]\", typeName: \"\", id: 154, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2;4;6;10;13;15;17;19;21;24;27;29;32;34;36;38;40;42;45;47;49;52;54;56;58;61;63;65;68;70;72;74;76;78;80;83;85;87;89;91;94;96;98;100;103;105;108;110;113;116;119;121;123;125;127;129;132;135;137;140;143;146;148;150;152;154}
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155 [label="if (31)",shape=diamond,comment="name: \"if (31)\", typeName: \"\", id: 155, branchId: 31, recurseId: -1, attributes: 4, notes: \"\""];
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156 [label="Item Id",comment="name: \"Item Id\", typeName: \"\", id: 156, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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157 [label="short",comment="name: \"short\", typeName: \"\", id: 157, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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158 [label="Item Aux",comment="name: \"Item Aux\", typeName: \"\", id: 158, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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159 [label="int",comment="name: \"int\", typeName: \"\", id: 159, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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160 [label="Use Method",comment="name: \"Use Method\", typeName: \"\", id: 160, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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161 [label="int",comment="name: \"int\", typeName: \"\", id: 161, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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162 [label="Use Count",comment="name: \"Use Count\", typeName: \"\", id: 162, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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163 [label="int",comment="name: \"int\", typeName: \"\", id: 163, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;2;4;6;10;13;15;17;19;21;24;27;29;32;34;36;38;40;42;45;47;49;52;54;56;58;61;63;65;68;70;72;74;76;78;80;83;85;87;89;91;94;96;98;100;103;105;108;110;113;116;119;121;123;125;127;129;132;135;137;140;143;146;148;150;152;154;157;159;161;163}
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}

dot/LevelSettings.dot

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@@ -97,6 +97,12 @@ rankdir = LR
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23 [label="LevelSettings",comment="name: \"LevelSettings\", typeName: \"\", id: 23, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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24 [label="Seed",comment="name: \"Seed\", typeName: \"\", id: 24, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
@@ -195,6 +201,12 @@ rankdir = LR
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136 [label="byte",comment="name: \"byte\", typeName: \"\", id: 136, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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137 [label="DisablePlayerInteractions ?",comment="name: \"DisablePlayerInteractions ?\", typeName: \"\", id: 137, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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138 [label="bool",comment="name: \"bool\", typeName: \"\", id: 138, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;25;34;36;38;40;42;51;53;55;57;59;61;63;65;67;69;71;73;75;77;79;81;83;85;87;89;91;93;95;97;99;101;103;105;107;109;111;113;115;117;119;121;123;125;132;134;136;138}
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139 [label="Server Identifier",comment="name: \"Server Identifier\", typeName: \"\", id: 139, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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140 [label="string",comment="name: \"string\", typeName: \"\", id: 140, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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141 [label="World Identifier from the server.",comment="name: \"World Identifier from the server.\", typeName: \"\", id: 141, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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142 [label="string",comment="name: \"string\", typeName: \"\", id: 142, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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143 [label="Scenario Identifier from the server.",comment="name: \"Scenario Identifier from the server.\", typeName: \"\", id: 143, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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144 [label="string",comment="name: \"string\", typeName: \"\", id: 144, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;25;34;36;38;40;42;51;53;55;57;59;61;63;65;67;69;71;73;75;77;79;81;83;85;87;89;91;93;95;97;99;101;103;105;107;109;111;113;115;117;119;121;123;125;132;134;136;138;140;142;144}
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}

dot/NetworkPermissions.dot

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digraph "NetworkPermissions" {
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rankdir = LR
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4-
199 -> 200
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199 [label="NetworkPermissions",comment="name: \"NetworkPermissions\", typeName: \"\", id: 199, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
8-
200 [label="serverAuthSoundEnabled",comment="name: \"serverAuthSoundEnabled\", typeName: \"\", id: 200, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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201 [label="bool",comment="name: \"bool\", typeName: \"\", id: 201, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;201}
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205 [label="NetworkPermissions",comment="name: \"NetworkPermissions\", typeName: \"\", id: 205, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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206 [label="serverAuthSoundEnabled",comment="name: \"serverAuthSoundEnabled\", typeName: \"\", id: 206, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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207 [label="bool",comment="name: \"bool\", typeName: \"\", id: 207, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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{ rank = max;207}
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}

dot/PlayerListPacket.dot

Lines changed: 2 additions & 2 deletions
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@@ -45,7 +45,7 @@ rankdir = LR
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3 [label="Dependency on 'Action'",shape=note,comment="name: \"Dependency on 'Action'\", typeName: \"\", id: 3, branchId: 0, recurseId: -1, attributes: 2, notes: \"\""];
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4 [label="if (0)",shape=diamond,comment="name: \"if (0)\", typeName: \"\", id: 4, branchId: 0, recurseId: -1, attributes: 4, notes: \"\""];
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5 [label="Add Player List",comment="name: \"Add Player List\", typeName: \"\", id: 5, branchId: 0, recurseId: -1, attributes: 8, notes: \"\""];
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6 [label="Array Size",comment="name: \"Array Size\", typeName: \"\", id: 6, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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6 [label="Entries Count",comment="name: \"Entries Count\", typeName: \"\", id: 6, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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7 [label="unsigned varint",comment="name: \"unsigned varint\", typeName: \"\", id: 7, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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8 [label="example element",style=dotted,comment="name: \"example element\", typeName: \"\", id: 8, branchId: 0, recurseId: -1, attributes: 16, notes: \"\""];
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9 [label="UUID",comment="name: \"UUID\", typeName: \"mce::UUID\", id: 9, branchId: 0, recurseId: -1, attributes: 256, notes: \"\""];
@@ -72,7 +72,7 @@ rankdir = LR
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121 [label="bool",comment="name: \"bool\", typeName: \"\", id: 121, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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122 [label="if (1)",shape=diamond,comment="name: \"if (1)\", typeName: \"\", id: 122, branchId: 1, recurseId: -1, attributes: 4, notes: \"\""];
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123 [label="Remove Player List",comment="name: \"Remove Player List\", typeName: \"\", id: 123, branchId: 0, recurseId: -1, attributes: 8, notes: \"\""];
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124 [label="Array Size",comment="name: \"Array Size\", typeName: \"\", id: 124, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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124 [label="Entries Count",comment="name: \"Entries Count\", typeName: \"\", id: 124, branchId: 0, recurseId: -1, attributes: 0, notes: \"\""];
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125 [label="unsigned varint",comment="name: \"unsigned varint\", typeName: \"\", id: 125, branchId: 0, recurseId: -1, attributes: 512, notes: \"\""];
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126 [label="example element",style=dotted,comment="name: \"example element\", typeName: \"\", id: 126, branchId: 0, recurseId: -1, attributes: 16, notes: \"\""];
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127 [label="UUID",comment="name: \"UUID\", typeName: \"mce::UUID\", id: 127, branchId: 0, recurseId: -1, attributes: 256, notes: \"\""];

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