SubChunkRequest

Client asks for specific sub-chunks around a center position — part of the limited sub-chunk request system.

sub-chunk-request.bin

struct SubChunkRequest {
  DimensionType                                DimensionType;
  varuint32 [] · SubChunkPacket.SubChunkPosOffset[] SubChunkPosOffsets;
  SubChunkPos                                  CenterPos;
}

Structure

Field	Type	Description
Dimension Type	DimensionType
Sub Chunk Pos Offsets	varuint32 count + SubChunkPacket.SubChunkPosOffset[]	Length-prefixed sequence.
Center Pos	SubChunkPos

Structure of SubChunkPosOffset

Field	Type	Description
X	int8 (LE)
Y	int8 (LE)
Z	int8 (LE)

Structure of SubChunkPos

Field	Type	Description
X	int32 (LE)
Y	int32 (LE)
Z	int32 (LE)

Notes

Positions are signed int8 offsets from the center sub-chunk; the server answers with SubChunk (174).
Order of fields changed at protocol 1001 (offsets moved before the center position).