Entity Relative Position and Look

Packet ID	Direction
0x21	Clientbound

Clientbound

Sent to the client to set an entity’s position relative to the clients previous position. Usually sent when an entity has moved less than 4 blocks. Position and rotation data is in entity space and thus quantized.

Field	Type	Description
Entity ID	Integer	The ID of the entity that should be moved
X	Byte	The X position of the player (Quantized)
Y	Byte	The Y position of the player (Quantized)
Z	Byte	The Z position of the player (Quantized)
Yaw	Byte	Rotation on the X Axis (Quantized)
Pitch	Byte	Rotation on the Y Axis (Quantized)

Example Packets

Clientbound

Field	Value
Entity ID	1298
X	5 (0.15)
Y	2 (0.06)
Z	15 (0.46)
Yaw	16 (22.58)
Pitch	9 (12.70)