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module Game.Hud (Hud, mkHud, render, height) where
import Data.IORef
import qualified Game.Sprites as S
import qualified Game.State as GS
import qualified SDL
height :: Int
height = 16
data Hud = Hud
{ sprite :: S.Sprite,
stateRef :: IORef GS.State
}
mkHud :: S.SpriteSheet -> IORef GS.State -> IO Hud
mkHud sprites stateRef = do
sprite <- S.get sprites "hud"
pure Hud {sprite = sprite, stateRef = stateRef}
render :: SDL.Renderer -> Hud -> IO ()
render renderer hud = do
state <- readIORef hud.stateRef
let xs = [0 .. state.totalBatteries - 1]
in mapM_ (\x -> S.render renderer hud.sprite (4 + x * 8) 4 0 (if state.batteries <= x then 0 else 1)) xs
let xs = [0 .. state.totalLives - 1]
in -- magic numbers
mapM_ (\x -> S.render renderer hud.sprite (320 - 4 - state.totalLives * 8 + x * 8) 4 0 (if state.lives <= x then 2 else 3)) xs
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