bool surface.is_chunk_visible(force)

[Mylon]

To make a mod I'm working on, I need the ability to see if a chunk is visible. This would be super handy.

Alternatively, if I could access radar.prototype.max_distance_of_nearby_sectors_revealed and player.max_distance_of_nearby_sectors_revealed (or whatever it's called) I could figure it out myself. But surface.is_chunk_visible(force) would be sufficient.