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A Chunk is a unit defined as either an area of the map 32x32 tiles in size (containing 1024 tiles in total) or a distance of 32 tiles.

Chunks are used for:

  • Map generation. When the player runs around and reveals the map or the radar explores the map, it is revealed in chunks.
  • Chunks are "switched off" to save CPU cycles. If nothing important happens in a chunk (e.g. there are only fishes swimming around in the chunk) the chunk is not computed in the next Tick.
  • The pollution model is based on chunks, and pollution spreads to neighboring chunks.
  • The next smaller unit is the Tile.
  • The next bigger unit is the Region.