3D grid type similar to grid library?

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I can't find a library that provides similar functionality to the grid library (https://crates.io/crates/grid), but in 3D. Does this library even exist? I just need a way to store data in 3D for a game/game engine i'm making.

(Also, am i supposed to put this in help? This is asking for help, but it's less about the actual programming and more about finding something to help with the programming)

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The general answer is ndarray — data structures in Rust // Lib.rs

You probably want to be careful, though: uncompressed 3d storage gets real expensive really quick, you might want to look at oct-trees, kD-trees or some other system to compress your data.

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