The following Packets are used to inform the client about changes
to Entities. These are usually generated
by
- EntityTrackerEntry (keeps track of entities near to each player)
- EntityPlayerMP (keeps track of player status, position, health, inventory, etc
The Client generally handles these packets by calling methods
in
- EntityClientPlayerMP (for changes to the user / controlling player)
- WorldClient (addition or removal of Entities)
- Entity (for status changes to entities in general, eg health, position, etc)
Typical server origin
|
NetClientHandler (Client processing)
|
Called by Client during
processing
|
|
Packet5PlayerInventory
Change the equipped item or armour of an entity (player, other players, mob) |
EntityLivingBase.onUpdate()
EntityTrackerEntry
|
.handlePlayerInventory()
|
Entity.setCurrentItemOrArmor()
|
Packet6SpawnPosition
Tells the client where the player will respawn next. |
ServerConfigurationManager
|
.handleSpawnPosition()
|
EntityClientPlayerMP.setSpawnChunk()
WorldInfo.setSpawnPosition()
|
Packet8UpdateHealth
Sends updated health and food status to the client. |
EntityPlayerMP.onUpdateEntity()
|
.handleUpdateHealth()
|
EntityClientPlayerMP
|
Packet9Respawn
Tell the client to respawn the player at the given location. |
ServerConfigurationManager
.transferPlayerToDimension()
.respawnPlayer()
|
.handleRespawn()
Change dimension, create new WorldClient,
change game type
|
Minecraft.setDimensionAndSpawnPlayer
PlayerControllerMP.setGameType
|
Packet10Flying,
Packet11PlayerPosition,
Packet12PlayerLook,
Packet13PlayerLookMove
|
NetServerHandler
.setPlayerLocation()
Only Packet13 is ever sent from server to client. It is sent once per second, to keep client
and server synchronised. Used as a
signal to the client that the world reload after respawning
has completed.
|
.handleFlying()
Update position and/or look to the new values. Then send the same Packet with updated
values (in particular the foot and eye y-values) back to the server. Get rid of respawn
screen.
|
EntityClientPlayerMP
.setPositionAndRotation() |
Packet16BlockItemSwitch
Changes the selected hotbar slot (0..8) |
ServerConfigurationManager
|
handleBlockItemSwitch()
Change inventory.currentitem to the
nominated slot.
|
|
Packet17Sleep
Put a player to sleep |
EntityPlayerMP.sleepInBedAt
|
handleSleep()
Put a player to sleep at the specified location, if possible.
|
Entityplayer.sleepInBedAt
|
Packet18Animation
Entity performs an action
1 = swing item
2 = gets hurt (not used)
3 = wake up
6 = critical hit
7 = magic critical hit
|
EntityPlayerMP
EntityLivingBase
|
handleAnimation()
Starts the appropriate animation (entity) or EffectRenderer
|
EffectRenderer.addEffect()
Entity
EntityLivingBase
EntityPlayer
<![if !supportLineBreakNewLine]> <![endif]> |
Packet20NamedEntitySpawn
Spawn an Other Player on the client
|
EntityTrackerEntry
|
handleNamedEntitySpawn()
Spawn the other player on the client, set its position, look, current
item, and other metadata (Datawatcher objects)
|
EntityOtherPlayerMP
WorldClient.addEntityToWorld()
|
Packet22Collect
Collect an item from the ground
|
EntityLivingBase
.onItemPickup() |
handleCollect()
Removes the EntityItem, plays a sound
effect, renders the pickup effect.
Does not actually give an item to the entity.
|
WorldClient()
EffectRenderer()
|
Packet23VehicleSpawn
Spawns a non-living Entity (boat, fireball, firework, etc)
|
EntityTrackerEntry
.getPacketForThisEntity()
FMLNetworkHandler
.getEntitySpawningPacket() |
handleVehicleSpawn()
Create the Entity, set position, pitch & yaw. If thrown, set velocity.
|
WorldClient.addEntityToWorld()
|
Packet24MobSpawn
Spawn a mob
|
EntityTrackerEntry
.getPacketForThisEntity()
FMLNetworkHandler.
getEntitySpawningPacket() |
handleMobSpawn()
Create the Entity, set position, pitch & yaws, and other metadata
(Datawatcher objects).
|
WorldClient.addEntityToWorld()
|
Packet25EntityPainting
|
EntityTrackerEntry
.getPacketForThisEntity() |
handleEntityPainting()
Create a painting
|
WorldClient.addEntityToWorld()
|
Packet26EntityXPOrb
|
EntityTrackerEntry
.getPacketForThisEntity() |
handleEntityExpOrb()
Create an XP orb.
|
WorldClient.addEntityToWorld()
|
Packet28EntityVelocity
|
EntityTrackerEntry
.sendLocationToAllClients() |
handleEntityVelocity()
Change the Entity’s velocity
|
Entity.setVelocity()
|
Packet29DestroyEntity
Remove one or more entities from client world, i.e. client doesn’t need to track them anymore. |
EntityPlayerMP.onUpdate()
|
handleDestroyEntity()
|
WorldClient.removeEntityFromWorld
|
Packet30Entity,
Packet31RelEntityMove,
Packet32EntityLook,
Packet33RelEntityMoveLook
Tell the client the relative movement and/or yaw+pitch of the entity. |
EntityTrackerEntry
.sendLocationToAllClients() |
.handleEntity()
Update position (based on relative movement) and/or yaw/pitch.
|
Entity.setPositionAndRotation2()
|
Packet34EntityTeleport
Move the Entity to the specified position, yaw+pitch
|
EntityTrackerEntry
.sendLocationToAllClients()
Performs teleport instead of relative movement: once every 20
seconds, if riding, or if movement is too big.
|
.handleEntityTeleport()
Set entity position to the specified position, yaw+pitch
|
Entity.setPositionAndRotation2()
|
Packet35EntityHeadRotation
|
EntityTrackerEntry
.sendLocationToAllClients() |
.handleEntityHeadRotation()
Sets the entity’s head to the given yaw
|
Entity. setRotationYawHead
|
Packet38EntityStatus
2 = hurt, 3 = dead
|
EntityPlayerMP.onItemUseFinish()
WorldServer.setEntityState()
|
.handleEntityStatus()
calls Entity.handleHealthUpdate(), which
plays appropriate sound and calls appropriate client method
|
Entity
.attackEntityFrom()
.onDeath()
|
Packet39AttachEntity
Sends mounting / leashing info for horse, boat, etc.
|
EntityPlayerMP.mountEntity
EntityTrackerEntry
EntityLiving
|
.handleAttachEntity()
mounts / leashes or unmounts / unleashes entity – horse, boat, cart, etc
|
EntityLiving
EntityBoat
|
Packet40EntityMetadata
Copy all changed metadata (WatchedObjects) to
client (and optionally, clear the ‘changed’ flag .watched for each)
|
EntityTrackerEntry
|
.handleEntityMetadata()
Transmit all metadata for the entity that has been changed
(‘.watched’ flag is true). The
‘.watched’ flag for each is optionally cleared when the packet is created.
|
Entity.DataWatcher
.updateWatchedObjectsFromList |
Packet41EntityEffect
Apply the potion effect to the entity |
EntityTrackerEntry
EntityPlayerMP
ServerConfigurationManager
|
.handleEntityEffect()
Apply the potion effect to the entity
|
EntityLivingBase.addPotionEffect()
|
Packet42RemoveEntityEffect
Remove a potion effect from the entity |
EntityPlayerMP
|
.handleRemoveEntityEffect()
|
EntityLivingBase. removePotionEffectClient
|
Packet43Experience
Set player experience
|
EntityPlayerMP
ServerConfigurationManager
|
.handleExperience()
sets the client player experience & level
|
EntityClientPlayerMP.setXPstats
|
Packet44UpdateAttributes
Send all Attributes for this entity to the client.
|
EntityTrackerEntry
|
.handleUpdateAttributes()
set the attributes of the client entity
|
EntityLivingBase.getAttributeMap() (the elements in the map are overwritten).
|
Packet200Statistic
Send statistics (achievement, distance walked, or similar)
|
EntityPlayerMP
|
.handleStatistic()
|
EntityClientPlayerMP
.incrementStat |
Packet201PlayerInfo
Send network info about a player to client (name, connected?, ping)
|
ServerConfigurationManager
|
.handlePlayerInfo()
|
NetClientHandler
|
Packet202PlayerAbilities
Inform the client of the player’s abilities (can fly, walk speed, etc)
|
EntityPlayerMP
ServerConfigurationManager
|
.handlePlayerAbilities()
NB - .allowEdit is ignored
|
EntityClientPlayerMP
|
There are also two FMLpackets used for custom entities:
Typical Server origin
|
FMLClientHandler (Client processing)
|
Called by Client during
processing
|
|
EntitySpawnPacket
|
FMLNetworkHandler
.getEntitySpawningPacket
(from EntityTrackerEntry)
|
EntitySpawnPacket.execute()
|
FMLClientHandler
.spawnEntityIntoClientWorld() |
EntitySpawnAdjustmentPacket
|
FMLNetworkHandler
.makeEntitySpawnAdjustment
(from EntityTrackerEntry)
|
EntitySpawnAdjustmentPacket.execute()
|
FMLClientHandler
.adjustEntityLocationOnClient() |
