83 lines
No EOL
3.4 KiB
Haskell
83 lines
No EOL
3.4 KiB
Haskell
module RPGEngine.Input.Playing
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( handleInputPlaying
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, checkPlaying
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, spawnPlayer
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) where
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import RPGEngine.Input.Core (InputHandler, handleKey, composeInputHandlers)
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import RPGEngine.Data (Game (..), Layout(..), Level(..), Physical(..), Player(..), State(..), X, Y, Direction (..))
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import RPGEngine.Data.Game (isLegalMove, isPlayerDead, isPlayerAtExit)
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import RPGEngine.Data.Level (directionOffsets, findFirstOf)
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import Data.Maybe (fromJust, isNothing)
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import Graphics.Gloss.Interface.IO.Game (Key(..))
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import Graphics.Gloss.Interface.IO.Interact (SpecialKey(..))
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------------------------------ Exported ------------------------------
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handleInputPlaying :: InputHandler Game
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handleInputPlaying = composeInputHandlers [
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-- Pause the game
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handleKey (Char 'p') pauseGame,
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-- Player movement
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handleKey (SpecialKey KeyUp) $ movePlayer North,
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handleKey (SpecialKey KeyRight) $ movePlayer East,
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handleKey (SpecialKey KeyDown) $ movePlayer South,
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handleKey (SpecialKey KeyLeft) $ movePlayer West,
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handleKey (Char 'w') $ movePlayer North,
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handleKey (Char 'd') $ movePlayer East,
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handleKey (Char 's') $ movePlayer South,
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handleKey (Char 'a') $ movePlayer West
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]
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----------------------------------------------------------------------
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-- Set the initial position of the player in a given level.
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spawnPlayer :: Level -> Player -> Player
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spawnPlayer l@Level{ layout = lay } p@Player{ position = prevPos } = p{ position = newPos }
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where try = findFirstOf l Entrance
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newPos | isNothing try = prevPos
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| otherwise = fromJust try
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checkPlaying :: Game -> Game
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checkPlaying g@Game{ state = s@Playing{ restart = restart }} = newGame
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where newGame | isPlayerDead g = loseGame
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| isPlayerAtExit g = g{ state = goToNextLevel s }
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| otherwise = g
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loseGame = g{ state = restart }
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checkPlaying g = g
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pauseGame :: Game -> Game
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pauseGame g@Game{ state = playing@Playing{} } = pausedGame
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where pausedGame = g{ state = Paused playing }
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pauseGame g = g
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-- Go to next level if there is a next level, otherwise, initialize win state.
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goToNextLevel :: State -> State
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goToNextLevel s@Playing{ levels = levels, level = current, count = count, player = player } = nextState
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where -- Either the next level or winState
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nextState | (count + 1) < length levels = nextLevelState
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| otherwise = Win
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nextLevelState = s{ level = nextLevel, count = count + 1, player = movedPlayer }
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nextLevel = levels !! (count + 1)
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movedPlayer = spawnPlayer nextLevel player
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goToNextLevel s = s
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-- Move a player in a direction if possible.
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movePlayer :: Direction -> Game -> Game
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movePlayer dir g@Game{ state = s@Playing{ player = p@Player{ position = (x, y) }}} = newGame
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where newGame = g{ state = newState }
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newState = s{ player = newPlayer }
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newPlayer = p{ position = newCoord }
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newCoord | isLegalMove dir g = (x + xD, y + yD)
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| otherwise = (x, y)
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(xD, yD) = directionOffsets dir
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movePlayer _ g = g
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-- Map all Physicals onto coordinates
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putCoords :: Level -> [(X, Y, Physical)]
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putCoords l@Level{ layout = lay } = concatMap (\(a, bs) -> map (\(b, c) -> (b, a, c)) bs) numberedList
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where numberedStrips = zip [0::Int .. ] lay
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numberedList = map (\(x, strip) -> (x, zip [0::Int ..] strip)) numberedStrips |