Field Of View scanning with a variety of algorithms. See https://github.com/kosmikus/LambdaHack/wiki/Fov-and-los for discussion.
|:: Ops TileKind|
tile content, determines clear tiles
location of the spectacor
the map that is scanned
Perform a full scan for a given location. Returns the locations that are currently in the field of view. The Field of View algorithm to use, passed in the second argument, is set in the config file.