[Home](./index.md) > [server](./server.md) > [Chunk](./server.chunk.md) ## Chunk class A 16^3 chunk of blocks representing a slice of world terrain. When to use: reading chunk data or working with bulk block operations. Do NOT use for: creating terrain directly; prefer `ChunkLattice`. **Signature:** ```typescript export default class Chunk implements protocol.Serializable ``` **Implements:** protocol.Serializable ## Remarks Chunks are fixed-size (16×16×16) and store block IDs by local coordinates.

Coordinate System

- \*\*Global (world) coordinates:\*\* integer block positions in world space. - \*\*Chunk origin:\*\* the world coordinate at the chunk's minimum corner (multiples of 16). - \*\*Local coordinates:\*\* 0..15 per axis within the chunk. \*\*Category:\*\* Blocks ## Constructors

Constructor	Modifiers	Description
[(constructor)(originCoordinate)](./server.chunk._constructor_.md)		Creates a new chunk instance.

## Properties

Property	Modifiers	Type	Description
[blockRotations](./server.chunk.blockrotations.md)	`readonly`	Readonly<Map<number, [BlockRotation](./server.blockrotation.md)>>	The rotations of the blocks in the chunk as a map of block index to rotation. \\Category:\\ Blocks
[blocks](./server.chunk.blocks.md)	`readonly`	Readonly<Uint8Array>	The blocks in the chunk as a flat Uint8Array\[4096\], each index as 0 or a block type ID. \\Category:\\ Blocks
[originCoordinate](./server.chunk.origincoordinate.md)	`readonly`	[Vector3Like](./server.vector3like.md)	The origin coordinate of the chunk (world-space, multiples of 16). \\Category:\\ Blocks

## Methods

Method	Modifiers	Description
[blockIndexToLocalCoordinate(index)](./server.chunk.blockindextolocalcoordinate.md)	`static`	Converts a block index to a local coordinate.
[getBlockId(localCoordinate)](./server.chunk.getblockid.md)		Gets the block type ID at a specific local coordinate.
[getBlockRotation(localCoordinate)](./server.chunk.getblockrotation.md)		Gets the rotation of a block at a specific local coordinate.
[globalCoordinateToLocalCoordinate(globalCoordinate)](./server.chunk.globalcoordinatetolocalcoordinate.md)	`static`	Converts a global coordinate to a local coordinate.
[globalCoordinateToOriginCoordinate(globalCoordinate)](./server.chunk.globalcoordinatetoorigincoordinate.md)	`static`	Converts a global coordinate to a chunk origin coordinate.
[hasBlock(localCoordinate)](./server.chunk.hasblock.md)		Checks if a block exists at a specific local coordinate.