pituicat/src/Classes/Scene.hs
2020-10-25 19:32:44 +01:00

27 lines
655 B
Haskell

{-# LANGUAGE ExistentialQuantification #-}
module Scenes.Scene where
import Affection
import qualified SDL
class Scene a where
-- | Perform initialization and output a (possibly empty) data container.
initScene :: IO a
-- | Load actual data into the initialized container.
loadScene :: a -> Affection ()
-- | Query whether loading data is finished.
isSceneLoaded :: a -> Affection Bool
-- | Run updates on the data given the time elapsed since last frame
update :: a -> Float -> Affection ()
-- | Handle input events
onEvents :: a -> [SDL.EventPayload] -> Affection ()
-- | perform the drawing
render :: a -> Affection ()