registerWorldFormat for worlds with embedded tilemaps #4049

I don't think it's necessary to refactor the way Worlds work in order to allow you to import/export files like this. Rather than a custom world format, you can write a pair of actions for importing/exporting a world in your desired format. The import would create multiple maps (potentially writing them to files if desired), while the export would take the current world's maps and write them to a file as you need. This could be done as a custom map format as well, in which case you'll probably want to prompt the user which map(s) from the "world" you want to read/write (using the existing data for unmodified maps). It might be a little unintuitive though, compared to actions that clearly deal with the entire "world".

Yeah if possible I'd prefer to work using only the game's file format. Preferably the Tiled world/map formats would be completely invisible to the mapper.

Although I could just load the entire world into one great big tilemap, it loses the ability to define room sizes.

Are there multiple layers per room? If not you could derive the room size from the each layer's contents. Alternatively, you could place rectangle objects to mark the rooms.

I do think the suggested feature's would be nice to have, though I think it's quite an uncommon need.

Are there multiple layers per room?

Yes, there's two tile layers and two decal layers.

If not you could derive the room size from the each layer's contents

Unfortunately the game has the ability to store entities outside of the room boundaries, so it's possible for an entity to have coordinates in one room but actually belong to a neighbour room; it wouldn't get loaded until the player enters the room it belongs to.

It's probably going to be too difficult I think.