Game.LambdaHack.Perception

Actors perceiving other actors and the dungeon level.

Documentation

data Perception

The type representing the perception of all actors on the level.

totalVisible :: Perception -> IntSet

The set of tiles visible by at least one hero.

debugTotalReachable :: Perception -> IntSet

For debug only: the set of tiles reachable (would be visible if lit) by at least one hero.

perception :: COps -> State -> Perception

Calculate the perception of all actors on the level.

actorReachesLoc :: ActorId -> Point -> Perception -> Maybe ActorId -> Bool

Check whether a location is within the visually reachable area of the given actor (disregarding lighting). Defaults to false if the actor is not player-controlled (monster or hero).

actorReachesActor :: ActorId -> ActorId -> Point -> Point -> Perception -> Maybe ActorId -> Bool

Check whether an actor is within the visually reachable area of the given actor (disregarding lighting). Not quite correct if FOV not symmetric (e.g., Shadow). Defaults to false if neither actor is player-controlled.

monsterSeesHero :: Ops TileKind -> Perception -> Level -> ActorId -> ActorId -> Point -> Point -> Bool

Whether a monster can see a hero (False if the target is not a hero). An approximation, to avoid computing FOV for the monster. If the target actor has no FOV pre-computed, we assume it can't be seen.