What is the binary data format of a TileMapLayer?

Help Programming
, ,
1

Godot Version

Godot 4.6.1

Question

I need to convert a TileMapLayer to an array of plain integers representing the tile indexes, eg. [0, 1, 2, …]. This needs to be quickly done at runtime so I would prefer to process the raw tile data instead of calling a method on each tile. I know TileMapLayer.tile_map_data contains the raw data of the map, but what is the format of this byte array?

For instance, if I have a map with a single atlas source and I place tiles 0, 1, 2 in the upper-left corner I get out the byte array [0, 0, 0, 0, 13, 0, 0, 0, 1, 0, 0, 0, 0 …]. I would assume the map is a bunch of 32-bit unsigned little endian integers but it seems like a lot more is stored there…

Thoughts on answering/fixing AI LLM-created garbage code?
2

Why do you need this?

3

Well, if you want to know all the details it would probably be best to simply look inside the engine source code.

4

Never mind. I just joined the discord and got my answer there. It’s an array of 12-byte structures which each contain the 16-bit values:

[x][y][source_id][atlas_coords_x][atlas_coords_y][alternative_tile]

Relevant code