MinecraftGamePhase

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Game phase for Minecraft 1.12.2

Applicable versions: 1.12.x

Phase Tree (Simplified)

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

Phase Tree (Full)

Game Loop
├── Async task
│   └── Player Action
├── For each world
│   ├── World Time Sync
│   ├── Weather
│   ├── Sleeping
│   ├── Natural Spawning
│   ├── Chunk Unload
│   ├── World Time Update
│   ├── Tile Tick
│   ├── Player Check Light
│   ├── Chunk Tick
│   │   ├── Light Logic
│   │   ├── Thunder
│   │   ├── Ice and Snow
│   │   └── Random Tick
│   ├── Player Chunk Map
│   │   └── Block Change Sync
│   ├── Village
│   ├── Zombie Siege Spawning
│   ├── Portal Cache
│   ├── Block Event
│   ├── Dragon Fight
│   ├── Entity
│   ├── Tile Entity
│   └── Entity Tracker
├── Network
│   └── Player Entity
├── Command Function
├── Console
└── Auto save

Phase Details

Game Loop

The main and the infinite loop

Code References

Minecraft 1.19, mojmap mapping

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

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

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

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

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 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

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

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

Player Check Light

Random light level check nearby players

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.world.WorldServer#playerCheckLight
• Caller: net.minecraft.world.WorldServer#tickBlocks

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

Light Logic

Light check and skylight recalculation

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.world.chunk.Chunk#enqueueRelightChecks
• Caller: net.minecraft.world.WorldServer#tickBlocks

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

Player Chunk Map

Player chunk map update

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.server.management.PlayerChunkMap#tick
• Caller: net.minecraft.world.WorldServer#tick

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

Village

Village logics

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.village.VillageCollection#tick
• Caller: net.minecraft.world.WorldServer#tick

Zombie Siege Spawning

Spawning zombie sieges

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.village.VillageSiege#tick
• Caller: net.minecraft.world.WorldServer#tick

Portal Cache

Timeout portal cache cleanup

Code References

Minecraft 1.13.2, mcp mapping

• Reference: net.minecraft.world.Teleporter#tick
• Caller: net.minecraft.world.WorldServer#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

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

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

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

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

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