FOSS gamedev and creative worlds

Could it be possible to make a callback that is called when a particular region of the world is loaded?

Like minetest.register_on_generated(func(minp, maxp, seed))?

Like it, but not only on the first time the region is loaded, but on the following times too (the region has been created, then unloaded, then loaded again).

Why do you need it?

If you want to make a mod that generates ores (for example) in a specific pattern, you will have to change unloaded nodes, but you still want the change to happen when the region gets loaded.

This works without problems with on_generated. If you want to generate ores in a specific pattern take a look at "perlinore".