MinecraftGamePhase

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Game phase for Minecraft 1.16.5

Applicable versions: 1.16.x

Phase Tree (Simplified)

Game Loop
├── For each world
│   ├── World Time Update
│   ├── For each chunk
│   │   ├── Block Change Sync
│   │   ├── Natural Spawning
│   │   └── Chunk Tick
│   ├── Chunk Unload
│   ├── Tile Tick
│   ├── Block Event
│   ├── Entity
│   └── Tile Entity
├── Player Entity
├── Auto save
└── Player Action

Phase Tree (Full)

Game Loop
├── Command Function
├── For each world
│   ├── World Time Sync
│   ├── World Border
│   ├── Weather
│   ├── Sleeping
│   ├── World Time Update
│   ├── Ticket
│   ├── For each chunk
│   │   ├── Block Change Sync
│   │   ├── Natural Spawning
│   │   └── Chunk Tick
│   │       ├── Thunder
│   │       ├── Ice and Snow
│   │       └── Random Tick
│   ├── Special Spawning
│   │   ├── Phantom Spawning
│   │   ├── Patrol Spawning
│   │   ├── Cat Spawning
│   │   ├── Zombie Siege Spawning
│   │   └── Wandering Trader Spawning
│   ├── Entity Tracker
│   ├── Chunk Unload
│   ├── Tile Tick
│   ├── Raid
│   ├── Block Event
│   ├── Dragon Fight
│   ├── Entity
│   └── Tile Entity
├── Network
│   └── Player Entity
├── Console
├── Auto save
└── Async task
    └── Player Action

Phase Details

Game Loop

The main and the infinite loop

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.MinecraftServer#runServer

Command Function

Executes functions and datapacks

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.ServerFunctionManager#tick
• Caller: net.minecraft.server.MinecraftServer#tickChildren

For each world

For each world, do following logics

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.MinecraftServer#tickChildren

World Time Sync

Sync world time to client

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.network.protocol.game.ClientboundSetTimePacket
• Caller: net.minecraft.server.MinecraftServer#tickChildren

World Border

World border update

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.level.border.WorldBorder#tick
• Caller: net.minecraft.server.level.ServerLevel#tick

Weather

Update weather

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#advanceWeatherCycle
• Caller: net.minecraft.server.level.ServerLevel#tick

Sleeping

Player sleeping logic

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#wakeUpAllPlayers
• Caller: net.minecraft.server.level.ServerLevel#tick

World Time Update

Update gametime and daytime of the world

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickTime
• Caller: net.minecraft.server.level.ServerLevel#tick

Ticket

Ticket System update

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.DistanceManager#purgeStaleTickets
• Caller: net.minecraft.server.level.ServerChunkCache#tick

For each chunk

For each chunk has player nearby, do following logics

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerChunkCache#tickChunks

Block Change Sync

Sync changed blocks in the chunk to the client

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ChunkHolder#broadcastChanges
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Natural Spawning

Natural mob spawning

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.level.NaturalSpawner#spawnForChunk
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Chunk Tick

Chunk Tick

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickChunk
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Thunder

Lighting and skeleton trap spawning

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickChunk

Ice and Snow

Forming ice and snow

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickChunk

Random Tick

Block and fluid random ticks

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickChunk

Special Spawning

Spawning special mobs

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Phantom Spawning

Spawning phantoms

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Patrol Spawning

Spawning pillager patrols

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Cat Spawning

Spawning cats in villages

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Zombie Siege Spawning

Spawning zombie sieges

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Wandering Trader Spawning

Spawning wandering traders

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#tickCustomSpawners
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Entity Tracker

Sync entity updates to the client

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ChunkMap#tick
• Caller: net.minecraft.server.level.ServerChunkCache#tickChunks

Chunk Unload

Unloading chunks

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ChunkMap#tick(java.util.function.BooleanSupplier)
• Caller: net.minecraft.server.level.ServerChunkCache#tick

Tile Tick

Executing tile tick events, including block tile ticks and fluid tile ticks

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.ticks.LevelTicks#tick
• Caller: net.minecraft.server.level.ServerLevel#tick

Raid

Raid logics

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.entity.raid.Raids#tick
• Caller: net.minecraft.server.level.ServerLevel#tick

Block Event

Block events

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.level.ServerLevel#runBlockEvents
• Caller: net.minecraft.server.level.ServerLevel#tick

Dragon Fight

Dragon fight logic

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.level.dimension.end.EndDragonFight#tick
• Caller: net.minecraft.server.level.ServerLevel#tick

Entity

Ticking entities

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.level.Level#guardEntityTick
• Caller: net.minecraft.server.level.ServerLevel#tick

Tile Entity

Ticking tile entities

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.world.level.Level#tickBlockEntities
• Caller: net.minecraft.server.level.ServerLevel#tick

Network

Network system ticking

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.network.ServerConnectionListener#tick
• Caller: net.minecraft.server.MinecraftServer#tickChildren

Player Entity

Ticking entity logic of players

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.network.ServerGamePacketListenerImpl#tick
• Caller: net.minecraft.network.Connection#tick

Console

Handling console inputs

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.dedicated.DedicatedServer#handleConsoleInputs
• Caller: net.minecraft.server.dedicated.DedicatedServer#tickChildren

Auto save

Auto save

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.MinecraftServer#saveEverything
• Caller: net.minecraft.server.MinecraftServer#tickServer

Async task

Executing async tasks

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.server.MinecraftServer#waitUntilNextTick
• Caller: net.minecraft.server.MinecraftServer#runServer

Player Action

Handling player actions from packets from clients

Code References

Minecraft 1.19, mojmap mapping

• Reference: net.minecraft.network.protocol.PacketUtils#ensureRunningOnSameThread

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