add Scene class

This commit is contained in:
nek0 2020-10-25 19:32:44 +01:00
parent 00ac2ef5b2
commit 31f56d62a3
1 changed files with 26 additions and 0 deletions

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src/Classes/Scene.hs Normal file
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{-# 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 ()