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# Objective An attempt to start building a base for first-party tilemaps (#13782). The objective is to create a very simple tilemap chunk rendering plugin that can be used as a building block for 3rd-party tilemap crates, and eventually a first-party tilemap implementation. ## Solution - Introduces two user-facing components, `TilemapChunk` and `TilemapChunkIndices`, and a new material `TilemapChunkMaterial`. - `TilemapChunk` holds the chunk and tile sizes, and the tileset image - The tileset image is expected to be a layered image for use with `texture_2d_array`, with the assumption that atlases or multiple images would go through an asset loader/processor. Not sure if that should be part of this PR or not.. - `TilemapChunkIndices` holds a 1d representation of all of the tile's Option<u32> index into the tileset image. - Indices are fixed to the size of tiles in a chunk (though maybe this should just be an assertion instead?) - Indices are cloned and sent to the shader through a u32 texture. ## Testing - Initial testing done with the `tilemap_chunk` example, though I need to include some way to update indices as part of it. - Tested wasm with webgl2 and webgpu - I'm thinking it would probably be good to do some basic perf testing. --- ## Showcase ```rust let chunk_size = UVec2::splat(64); let tile_size = UVec2::splat(16); let indices: Vec<Option<u32>> = (0..chunk_size.x * chunk_size.y) .map(|_| rng.gen_range(0..5)) .map(|i| if i == 0 { None } else { Some(i - 1) }) .collect(); commands.spawn(( TilemapChunk { chunk_size, tile_size, tileset, }, TilemapChunkIndices(indices), )); ```  |
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Bevy Sprite
