From 6f9e98cc5cefa9b35f139d3715339d676eff18ed Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Wed, 1 Mar 2023 20:34:22 +0000
Subject: Removed another unncessary IORef

---
 src/Game.hs | 87 ++++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 45 insertions(+), 42 deletions(-)

(limited to 'src/Game.hs')

diff --git a/src/Game.hs b/src/Game.hs
index 2d8c23a..41c8178 100644
--- a/src/Game.hs
+++ b/src/Game.hs
@@ -42,12 +42,12 @@ data Env = Env
     canvas :: SDL.Texture,
     fullscreen :: Bool,
     renderRect :: SDL.Rectangle CInt,
-    controls :: IORef C.Controls,
     map :: M.Map,
     sprites :: S.SpriteSheet,
     font :: BF.BitmapFont,
-    entities :: IORef E.Entities,
+    entities :: E.Entities,
     hud :: H.Hud,
+    controls :: IORef C.Controls,
     state :: IORef GS.State
   }
 
@@ -74,7 +74,6 @@ main = do
   tsTexture <- SDL.Image.loadTexture renderer "data/tiles.png"
   ssTexture <- SDL.Image.loadTexture renderer "data/sprites.png"
   bfTexture <- SDL.Image.loadTexture renderer "data/font.png"
-  controls <- newIORef =<< C.init
   map' <- M.load "data/map.json" tsTexture
   sprites <- S.load "data/sprites.json" ssTexture
   font <- BF.load "data/font.json" bfTexture
@@ -88,8 +87,9 @@ main = do
           hitDelay = 0,
           gameOverDelay = 0
         }
+  controls <- newIORef =<< C.init
   hud <- H.mkHud sprites state
-  entities <- newIORef =<< E.mkEntities sprites map' controls state
+  entities <- E.mkEntities sprites map' controls state
   gameLoop
     Env
       { window = window,
@@ -97,12 +97,12 @@ main = do
         canvas = canvas,
         fullscreen = False,
         renderRect = defaultRenderRect,
-        controls = controls,
         map = map',
         sprites = sprites,
         font = font,
         entities = entities,
         hud = hud,
+        controls = controls,
         state = state
       }
   SDL.destroyWindow window
@@ -141,6 +141,7 @@ gameLoop e = do
       renderRect = env.renderRect
       controls = env.controls
       stateRef = env.state
+      entities = env.entities
 
   -- ESC or close the window to quit
   let quit = fromMaybe False (U.isPressed SDL.KeycodeEscape events) || SDL.QuitEvent `elem` events
@@ -153,8 +154,9 @@ gameLoop e = do
 
     state <- readIORef stateRef
     when (state.gameOverDelay > 1) $ stateRef $= state {GS.gameOverDelay = state.gameOverDelay - 1}
-    when (state.gameOverDelay /= 1) playLoop
-    when (state.gameOverDelay == 1) gameOverLoop
+    when (state.gameOverDelay == 1) $ gameOverLoop env
+
+    updatedEntities <- if state.gameOverDelay /= 1 then playLoop env else pure entities
 
     SDL.rendererRenderTarget renderer $= Nothing
     SDL.clear renderer
@@ -162,38 +164,39 @@ gameLoop e = do
 
     SDL.present renderer
 
-    gameLoop env
-  where
-    playLoop :: IO ()
-    playLoop = do
-      let renderer = e.renderer
-          map' = e.map
-          entities = e.entities
-          hud = e.hud
-
-      updated <- E.updateAll =<< readIORef entities
-      entities $= updated
-
-      -- to update the map viewport
-      let (px, py) = E.playerPosition updated
-
-      -- render map and entities
-
-      -- set the SDL viewport
-      viewport <- M.viewport renderer map' px py (fromIntegral gameWidth) (fromIntegral gameHeight - H.height) (Just (0, H.height))
-      M.render renderer map' viewport
-      E.renderVisible renderer updated viewport
-
-      -- reset viewport to draw the HUD
-      SDL.rendererViewport renderer $= Nothing
-      H.render renderer hud
-
-    gameOverLoop :: IO ()
-    gameOverLoop = do
-      let renderer = e.renderer
-          sprites = e.sprites
-          hud = e.hud
-
-      H.render renderer hud
-      title <- S.get sprites "game-over"
-      S.render renderer title 112 80 0 0
+    gameLoop env {entities = updatedEntities}
+
+playLoop :: Env -> IO E.Entities
+playLoop e = do
+  let renderer = e.renderer
+      map' = e.map
+      entities = e.entities
+      hud = e.hud
+
+  updated <- E.updateAll entities
+
+  -- to update the map viewport
+  let (px, py) = E.playerPosition updated
+
+  -- render map and entities
+
+  -- set the SDL viewport
+  viewport <- M.viewport renderer map' px py (fromIntegral gameWidth) (fromIntegral gameHeight - H.height) (Just (0, H.height))
+  M.render renderer map' viewport
+  E.renderVisible renderer updated viewport
+
+  -- reset viewport to draw the HUD
+  SDL.rendererViewport renderer $= Nothing
+  H.render renderer hud
+
+  pure updated
+
+gameOverLoop :: Env -> IO ()
+gameOverLoop e = do
+  let renderer = e.renderer
+      sprites = e.sprites
+      hud = e.hud
+
+  H.render renderer hud
+  title <- S.get sprites "game-over"
+  S.render renderer title 112 80 0 0
-- 
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