UpdateAttributes

Updates entity attributes (health, movement speed, hunger, ...) with min/max/current/default values and modifiers.

update-attributes.bin

struct UpdateAttributes {
  ActorRuntimeID                               RuntimeId;
  varuint32 [] · AttributeData[]               AttributeData;
  PlayerInputTick                              Tick;
}

Structure

Field	Type	Description
Runtime Id	ActorRuntimeID
Attribute Data	varuint32 count + AttributeData[]	Length-prefixed sequence.
Tick	PlayerInputTick

Structure of AttributeData

Field	Type	Description
Min Value	float32 (LE)
Max Value	float32 (LE)
Current Value	float32 (LE)
Default Min Value	float32 (LE)
Default Max Value	float32 (LE)
Default Value	float32 (LE)
Name	string
Modifiers	varuint32 count + AttributeModifier[]	Length-prefixed sequence.

Structure of AttributeModifier

Field	Type	Description
Id	string
Name	string
Amount	float32 (LE)
Operation	int32 (LE)
Operand	int32 (LE)
Serialize	bool

Notes

Attribute names are namespaced strings like minecraft:health; each entry can carry modifiers.