Protocol for r/21_u8 NetworkProtocolVersion 800

[oswaldolb]

Minecraft Network Protocol Docs 4/8/25

For r21_u8, Network Protocol Version 800

New Packets

ClientboundControlSchemeSetPacket:

• Added mControlScheme (enum ControlScheme::Scheme) [ControlScheme::Scheme enum definition in New Enums]

PlayerLocationPacket:

• Added mType (enum PlayerLocationPacket::Type) [PlayerLocationPacket::Type enum definition in New Enums]
• Added conditional write on mType:
  • If Type::PLAYER_LOCATION_COORDINATES:
    • Added mId (ActorUniqueID)
    • Added mPos (Vec3)
  • If Type::PLAYER_LOCATION_HIDE:
    • Added mId (ActorUniqueID)

Packet Changes

BiomeDefinitionListPacket:

• Added mBiomeData(std::unordered_map<BiomeStringList::BiomeStringIndex, BiomeDefinitionData>) [BiomeStringList::BiomeStringIndex type definition in New Types] [BiomeDefinitionData type definition in New Types]
• Added mStringList (BiomeStringList) [BiomeStringList type definition in New Types]

Removed Packets

• CompressedBiomeDefinitionListPacket
• PassengerJump
• PlayerInputPacket

New Types

BiomeStringList::BiomeStringIndex (uint16_t)

BiomeIdType (uint16_t)

SharedTypes::Comprehensive::CoordinateEvaluationOrder (enum SharedTypes::v1_21_10::CoordinateEvaluationOrder) [SharedTypes::v1_21_10::CoordinateEvaluationOrder enum definition in New Enums]

SharedTypes::Comprehensive::RandomDistributionType (enum SharedTypes::v1_21_10::RandomDistributionType) [SharedTypes::v1_21_10::RandomDistributionType enum definition in New Enums]

BlockRuntimeId (uint32_t)

BiomeDefinitionData:

• Added mId (brstd::optional)
• Added mTemperature (float)
• Added mDownfall (float)
• Added mRedSporeDensity (float)
• Added mBlueSporeDensity (float)
• Added mAshDensity (float)
• Added mWhiteAshDensity (float)
• Added mDepth (float)
• Added mScale (float)
• Added mMapWaterColorARGB (int32_t)
• Added mRain (bool)
• Added mTags (brstd::optional) [BiomeTagsData type definition below]
• Added mChunkGenData (brstd::optional) [BiomeDefinitionChunkGenData type definition below]

BiomeTagsData:

• Added mTags (std::vector<BiomeStringList::BiomeStringIndex>)

BiomeDefinitionChunkGenData:

• Added mClimate (brstd::optional) [BiomeClimateData type definition below]
• Added mConsolidatedFeatures (brstd::optional) [BiomeConsolidatedFeaturesData type definition below]
• Added mMountainParams (brstd::optional) [BiomeMountainParamsData type definition below]
• Added mSurfaceMaterialAdjustments (brstd::optional) [BiomeSurfaceMaterialAdjustmentData type definition below]
• Added mSurfaceMaterials (brstd::optional) [BiomeSurfaceMaterialData type definition below]
• Added mHasSwampSurface (bool)
• Added mHasFrozenOceanSurface (bool)
• Added mHasTheEndSurface (bool)
• Added mMesaSurface (brstd::optional) [BiomeMesaSurfaceData type definition below]
• Added mCappedSurface (brstd::optional) [BiomeCappedSurfaceData type definition below]
• Added mOverworldGenRules (brstd::optional) [BiomeOverworldGenRulesData type definition below]
• Added mMultinoiseGenRules (brstd::optional) [BiomeMultinoiseGenRulesData type definition below]
• Added mLegacyWorldGenRules (brstd::optional) [BiomeLegacyWorldGenRulesData type definition below]
• Added mReplaceBiomes (brstd::optional) [BiomeReplacementsData type definition below]

BiomeClimateData:

• Added mTemperature (float)
• Added mDownfall (float)
• Added mRedSporeDensity (float)
• Added mBlueSporeDensity (float)
• Added mAshDensity (float)
• Added mWhiteAshDensity (float)
• Added mSnowAccumulationMin (float)
• Added mSnowAccumulationMax (float)

BiomeConsolidatedFeaturesData:

• Added mFeatures (std::vector) [BiomeConsolidatedFeatureData type definition below]

BiomeConsolidatedFeatureData:

• Added mScatter (BiomeScatterParamData) [BiomeScatterParamData type definition below]
• Added mFeature (BiomeStringList::BiomeStringIndex)
• Added mIdentifier (BiomeStringList::BiomeStringIndex)
• Added mPass (BiomeStringList::BiomeStringIndex)
• Added mCanUseInternalFeature (bool)

BiomeScatterParamData:

• Added mCoordinates (std::vector) [BiomeCoordinateData type definition below]
• Added mEvalOrder (SharedTypes::Comprehensive::CoordinateEvaluationOrder)
• Added mChancePercentType (enum ExpressionOp) [ExpressionOp enum definition in New Enums]
• Added mChancePercent (BiomeStringList::BiomeStringIndex)
• Added mChanceNumerator (int32_t)
• Added mChanceDenominator (int32_t)
• Added mIterationsType (enum ExpressionOp)
• Added miterations (BiomeStringList::BiomeStringIndex)

BiomeCoordinateData:

• Added mMinValueType (enum ExpressionOp)
• Added mMinValue (BiomeStringList::BiomeStringIndex)
• Added mMaxValueType (enum ExpressionOp)
• Added mMaxValue (BiomeStringList::BiomeStringIndex)
• Added mGridOffset (uint32_t)
• Added mGridStepSize (uint32_t)
• Added mDistribution (SharedTypes::Comprehensive::RandomDistributionType)

BiomeMountainParamsData:

• Added mSteepBlock (BlockRuntimeId)
• Added mNorthSlopes (bool)
• Added mSouthSlopes (bool)
• Added mWestSlopes (bool)
• Added mEastSlopes (bool)
• Added mTopSlideEnabled (bool)

BiomeSurfaceMaterialAdjustmentData:

• Added mAdjustments (std::vector) [BiomeElementData type definition below]

BiomeElementData:

• Added mNoiseFreqScale (float)
• Added mNoiseLowerBound (float)
• Added mNoiseUpperBound (float)
• Added mHeightMinType (enum ExpressionOp)
• Added mHeightMin (BiomeStringList::BiomeStringIndex)
• Added mHeightMaxType (enum ExpressionOp)
• Added mHeightMax (BiomeStringList::BiomeStringIndex)
• Added mAdjustedMaterials (BiomeSurfaceMaterialData) [BiomeSurfaceMaterialData type definition below]

BiomeSurfaceMaterialData:

• Added mTopBlock (BlockRuntimeId)
• Added mMidBlock (BlockRuntimeId)
• Added mSeaFloorBlock (BlockRuntimeId)
• Added mFoundationBlock (BlockRuntimeId)
• Added mSeaBlock (BlockRuntimeId)
• Added mSeaFloorDepth (int)

BiomeMesaSurfaceData:

• Added mClayMaterial (BlockRuntimeId)
• Added mHardClayMaterial (BlockRuntimeId)
• Added mBrycePillars (BlockRuntimeId)
• Added mHasForest (BlockRuntimeId)

BiomeCappedSurfaceData:

• Added mFloorBlocks (std::vector)
• Added mCeilingBlocks (std::vector)
• Added mSeaBlock (brstd::optional)
• Added mFoundationBlock (brstd::optional)
• Added mBeachBlock (brstd::optional)

BiomeOverworldGenRulesData:

• Added mHillsTransformations (std::vector) [BiomeWeightedData type definition below]
• Added mMutateTransformations (std::vector)
• Added mRiverTransformations (std::vector)
• Added mShoreTransformations (std::vector)
• Added mPreHillsEdge (std::vector) [BiomeConditionalTransformationData type definition below]
• Added mPostShoreEdge (std::vector)
• Added mClimate (std::vector) [BiomeWeightedTemperatureData type definition below]

BiomeWeightedData:

• Added mBiomeIdentifier (BiomeStringList::BiomeStringIndex)
• Added mWeight (uint32_t)

BiomeConditionalTransformationData:

• Added mTransformsInto (std::vector)
• Added mConditionJson (BiomeStringList::BiomeStringIndex)
• Added mMinPassingNeighbors (uint32_t)

BiomeWeightedTemperatureData:

• Added mTemperature (enum BiomeTemperatureCategory) [BiomeTemperatureCategory enum definition in New Enums]
• Added mWeight (uint32_t)

BiomeMultinoiseGenRulesData:

• Added mTemperature (float)
• Added mHumidity (float)
• Added mAltitude (float)
• Added mWeirdness (float)
• Added mWeight (float)

BiomeLegacyWorldGenRulesData:

• Added mLegacyPreHillsEdge (std::vector)

BiomeReplacementsData:

• Added mBiomeReplacements (std::vector) [BiomeReplacementData type definition below]

BiomeReplacementData:

• Added mReplacementBiome (BiomeStringList::BiomeStringIndex)
• Added mDimension (BiomeStringList::BiomeStringIndex)
• Added mTargetBiomes (std::vectorBiomeStringList::BiomeStringIndex)
• Added mAmount (float)
• Added mNoiseFrequencyScale (float)
• Added mReplacementIndex (uint32_t)

BiomeStringList:

• Added mAllStrings (std::unordered_map<std::string, BiomeStringList::BiomeStringIndex>)
• Added mStrings (std::vectorstd::string)

Other Changes to Types

PlayerListEntry:

• Added mColor (mce::Color)

New Enums

ControlScheme::Scheme:

• Added LockedPlayerRelativeStrafe (0) []
• Added CameraRelative (1) []
• Added CameraRelativeStrafe (2) []
• Added PlayerRelative (3) []
• Added PlayerRelativeStrafe (4) []

ExpressionOp:

• Added Unknown (-1) []
• Added LeftBrace (0) []
• Added RightBrace (1) []
• Added LeftBracket (2) []
• Added RightBracket (3) []
• Added LeftParenthesis (4) []
• Added RightParenthesis (5) []
• Added Negate (6) []
• Added LogicalNot (7) []
• Added Abs (8) []
• Added Add (9) []
• Added Acos (10) []
• Added Asin (11) []
• Added Atan (12) []
• Added Atan2 (13) []
• Added Ceil (14) []
• Added Clamp (15) []
• Added CopySign (16) []
• Added Cos (17) []
• Added DieRoll (18) []
• Added DieRollInt (19) []
• Added Div (20) []
• Added Exp (21) []
• Added Floor (22) []
• Added HermiteBlend (23) []
• Added Lerp (24) []
• Added LerpRotate (25) []
• Added Ln (26) []
• Added Max (27) []
• Added Min (28) []
• Added MinAngle (29) []
• Added Mod (30) []
• Added Mul (31) []
• Added Pow (32) []
• Added Random (33) []
• Added RandomInt (34) []
• Added Round (35) []
• Added Sin (36) []
• Added Sign (37) []
• Added Sqrt (38) []
• Added Trunc (39) []
• Added QueryFunction (40) []
• Added ArrayVariable (41) []
• Added ContextVariable (42) []
• Added EntityVariable (43) []
• Added TempVariable (44) []
• Added MemberAccessor (45) []
• Added HashedStringHash (46) []
• Added GeometryVariable (47) []
• Added MaterialVariable (48) []
• Added TextureVariable (49) []
• Added LessThan (50) []
• Added LessEqual (51) []
• Added GreaterEqual (52) []
• Added GreaterThan (53) []
• Added LogicalEqual (54) []
• Added LogicalNotEqual (55) []
• Added LogicalOr (56) []
• Added LogicalAnd (57) []
• Added NullCoalescing (58) []
• Added Conditional (59) []
• Added ConditionalElse (60) []
• Added Float (61) []
• Added Pi (62) []
• Added Array (63) []
• Added Geometry (64) []
• Added Material (65) []
• Added Texture (66) []
• Added Loop (67) []
• Added ForEach (68) []
• Added Break (69) []
• Added Continue (70) []
• Added Assignment (71) []
• Added Pointer (72) []
• Added Semicolon (73) []
• Added Return (74) []
• Added Comma (75) []
• Added This (76) []
• Added Internal_NonEvaluatedArray (77) []
• Added Count (78) []

PlayerLocationPacket::Type:

• Added PLAYER_LOCATION_COORDINATES (0) []
• Added PLAYER_LOCATION_HIDE (1) []

SharedTypes::v1_21_10::CoordinateEvaluationOrder:

• Added XYZ (0) []
• Added XZY (1) []
• Added YXZ (2) []
• Added YZX (3) []
• Added ZXY (4) []
• Added ZYX (5) []

SharedTypes::v1_21_10::RandomDistributionType:

• Added SingleValued (0) []
• Added Uniform (1) []
• Added Gaussian (2) []
• Added InverseGaussian (3) []
• Added FixedGrid (4) []
• Added JitteredGrid (5) []
• Added Triangle (6) []

Enum Changes

ActorDataIDs:

• Added SEAT_THIRD_PERSON_CAMERA_RADIUS (134) []
• Added SEAT_CAMERA_RELAX_DISTANCE_SMOOTHING (135) []
• Displaced Count

ActorFlags:

• Added DOES_SERVER_AUTH_ONLY_DISMOUNT (123) []
• Displaced Count

ActorType:

• Added HappyGhast (147 | Animal) []

AnimatePacket::Action:

• Removed RowRight
• Removed RowLeft

Connection::DisconnectFailReason:

• Added AsyncJoinTaskDenied (118) []

Editor::WorldType:

• Added EditorRealmsUpload (3) []

MinecraftPacketIds:

• Added PassengerJump_Deprecated (20) []
• Added PlayerInput_Deprecated (57) []
• Added CompressedBiomeDefinitionList_DEPRECATED (301) []
• Added PlayerLocation (326) []
• Added ClientboundControlSchemeSetPacket (327) []
• Changed EndId from 326 to 328
• Removed PassengerJump
• Removed PlayerInput
• Removed CompressedBiomeDefinitionList

ServerAuthMovementMode:

• Added LegacyClientAuthoritativeV1_Deprecated (0) []
• Removed LegacyClientAuthoritativeV1

[Kaooot]

Please add missing LevelSoundEvents to the enumerations.