[Tool]
[GlobalClass]
public partial class TerrainData
	: Resource
{
	[Export] public Godot.Collections.Dictionary<Vector2I, TerrainChunk> Chunks { get; set; } = [];

	public ref Tile this[TilePos pos] { get {
		var chunkPos = TerrainChunk.ToChunkPos(pos);
		if (!Chunks.TryGetValue(chunkPos, out var chunk))
			Chunks.Add(chunkPos, chunk = new());
		return ref chunk[pos];
	} }

	public Tile GetTileOrDefault(TilePos pos)
	{
		var chunkPos = TerrainChunk.ToChunkPos(pos);
		return Chunks.TryGetValue(chunkPos, out var chunk)
			? chunk[pos] : default;
	}
}