Exit transition

5 files changed, 36 insertions, 17 deletions

diff --git a/src/Game/Entities.hs b/src/Game/Entities.hs
index b53e4e3..8a939f4 100644
--- a/src/Game/Entities.hs
+++ b/src/Game/Entities.hs
@@ -60,8 +60,8 @@ addExit es x y = do
 
 updateAll :: Entities -> GS.State -> IO (Entities, GS.State)
 updateAll es state = do
-  -- update the player first (including the reference)
-  updatedPlayer <- player.update player
+  -- update the player first (including the reference), unless the level is completed
+  updatedPlayer <- if state.levelCompleted /= GS.ExitOff then pure player else player.update player
   void $ writeIORef es.player updatedPlayer
   -- then the other entities
   updated <- (updatedPlayer :) <$> traverse (updateFilter $ state.hitDelay > 0) others
@@ -91,14 +91,21 @@ updateAll es state = do
                 if s.lives == 1
                   then
                     ( s {GS.lives = 0, GS.gameOverDelay = gameOverDelay},
-                      (head ents) {dir = Dying, gravity = gravityUp, frame = 0} : tail ents
+                      -- the player is not in the action, changing then type disables collision detection
+                      (head ents) {typ = TypeEffect, dir = Dying, gravity = gravityUp, frame = 0} : tail ents
                     )
                   else
                     ( s {GS.lives = s.lives - 1, GS.hitDelay = hitDelay},
                       ents
                     )
           processActions s' ents' t
-        ActionExitLevel -> processActions s {GS.levelCompleted = True} ents t
+        ActionExitStarted ->
+          processActions
+            s {GS.levelCompleted = GS.ExitStarted}
+            -- the player is not in the action, changing the type disables collision detection
+            ((head ents) {typ = TypeEffect} : tail ents)
+            t
+        ActionExitDone -> processActions s {GS.levelCompleted = GS.ExitDone} ents t
     processActions s ents [] = pure (s, ents)
 
     -- Update entities skipping enemies if the player was hit
@@ -134,7 +141,8 @@ render renderer es state = do
     else traverse_ (renderWiggling ((.&.) 2 state.hitDelay)) others
   -- always render player last
   -- won't draw all the frames if the player was hit
-  if testBit state.hitDelay 2 then pure () else renderOne player
+  -- or we are exiting the level
+  if testBit state.hitDelay 2 || state.levelCompleted /= GS.ExitOff then pure () else renderOne player
   where
     player = head es.entities
     others = tail es.entities
diff --git a/src/Game/Entities/Common.hs b/src/Game/Entities/Common.hs
index 2e447f5..69786e5 100644
--- a/src/Game/Entities/Common.hs
+++ b/src/Game/Entities/Common.hs
@@ -30,7 +30,7 @@ collision :: IORef Entity -> Int -> Collision
 collision playerRef otherHeight other = do
   player <- readIORef playerRef
   pure $
-    player.dir /= Dying
+    player.typ == TypePlayer
       && player.x + 4 < other.x + 12
       && other.x + 4 < player.x + 12
       && player.y + otherHeight - 4 < other.y + otherHeight
diff --git a/src/Game/Entities/Exit.hs b/src/Game/Entities/Exit.hs
index 12f160d..b87c115 100644
--- a/src/Game/Entities/Exit.hs
+++ b/src/Game/Entities/Exit.hs
@@ -25,15 +25,24 @@ mkExit sprites x y playerCollision = do
       }
 
 updateExit :: Collision -> Entity -> IO Entity
-updateExit touchedPlayer e = do
-  touched <- if e.frame < fullyOpen then pure False else touchedPlayer e
-  pure $ if touched then e {destroy = True, actions = [ActionExitLevel]} else update
+updateExit touchedPlayer e
+  -- right is the set 0, left set 1
+  | e.dir == DirRight = do
+      touched <- if e.frame < fullyOpen then pure False else touchedPlayer e
+      pure $ if touched then e {dir = DirLeft, frame = 0, actions = [ActionExitStarted]} else updateLoop
+  | otherwise = pure updateOnce
   where
     fullyOpen :: Int
     fullyOpen = 7
 
-    update :: Entity
-    update
+    updateLoop :: Entity
+    updateLoop
       | e.delay > 0 = e {delay = e.delay - 1}
       | e.frame + 1 < frameLimit e = e {delay = frameDelay, frame = e.frame + 1}
       | otherwise = e {delay = frameDelay, frame = fullyOpen}
+
+    updateOnce :: Entity
+    updateOnce
+      | e.delay > 0 = e {delay = e.delay - 1}
+      | e.frame + 1 < frameLimit e = e {delay = frameDelay, frame = e.frame + 1}
+      | otherwise = e {destroy = True, actions = [ActionExitDone]}
diff --git a/src/Game/Entities/Types.hs b/src/Game/Entities/Types.hs
index 392a86f..4ece6c5 100644
--- a/src/Game/Entities/Types.hs
+++ b/src/Game/Entities/Types.hs
@@ -14,7 +14,7 @@ import qualified Game.Sprites as S
 
 data Dir = DirRight | DirLeft | Dying deriving (Eq)
 
-data Type = TypePlayer | TypePickup | TypeEffect | TypeEnemy
+data Type = TypePlayer | TypePickup | TypeEffect | TypeEnemy deriving (Eq)
 
 type Collision = Entity -> IO Bool
 
@@ -29,7 +29,7 @@ data Entities = Entities
 -- | The effect name must match the sprite name in the spritesheet.
 type EffectName = String
 
-data Action = ActionAddEffect Int Int EffectName | ActionAddBattery Int Int | ActionHitPlayer | ActionExitLevel
+data Action = ActionAddEffect Int Int EffectName | ActionAddBattery Int Int | ActionHitPlayer | ActionExitStarted | ActionExitDone
 
 data Entity = Entity
   { typ :: Type,
diff --git a/src/Game/State.hs b/src/Game/State.hs
index 3773268..4f46c01 100644
--- a/src/Game/State.hs
+++ b/src/Game/State.hs
@@ -1,4 +1,4 @@
-module Game.State (State (..), initialState, levelState, maxLives) where
+module Game.State (State (..), initialState, levelState, maxLives, ExitState (..)) where
 
 import Game.Entities.Const (hitDelay)
 import qualified Game.Map as M
@@ -6,6 +6,8 @@ import qualified Game.Map as M
 maxLives :: Int
 maxLives = 4
 
+data ExitState = ExitOff | ExitStarted | ExitDone deriving (Eq)
+
 data State = State
   { batteries :: Int,
     totalBatteries :: Int,
@@ -15,7 +17,7 @@ data State = State
     gameOverDelay :: Int,
     exit :: Bool,
     lastBattery :: (Int, Int),
-    levelCompleted :: Bool,
+    levelCompleted :: ExitState,
     currentLevel :: Int
   }
 
@@ -31,7 +33,7 @@ initialState m =
       exit = False,
       -- doesn't matter where
       lastBattery = (0, 0),
-      levelCompleted = False,
+      levelCompleted = ExitOff,
       currentLevel = 0
     }
 
@@ -45,5 +47,5 @@ levelState s m =
       exit = False,
       -- doesn't matter where
       lastBattery = (0, 0),
-      levelCompleted = False
+      levelCompleted = ExitOff
     }