Interface CaveOptions

extra terrain kinds beyond wall/floor, appended after them - a game's own ids

cells that must end up floor whatever the rolls did, and reachable

A stream to draw from instead of seeding one: the cave consumes it, so the caller's sequence advances and a replay of that sequence reproduces the cave. Wins over seed.

seeds the Random stream the cave is drawn from; required unless random is given

the grid the cave is carved on; defaults to 'square'

one start per side, placed on the named chamber's centre

cleared cells per 1000 floor cells, returned as villages (the game decides what one means)

terrain ids to write; both must exist in the kinds passed to the Level