22 lines
No EOL
758 B
Haskell
22 lines
No EOL
758 B
Haskell
module RPGEngine.Data.Game
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( isLegalMove
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) where
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import RPGEngine.Data
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( Player(Player, position),
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Direction,
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Physical(Exit, Walkable, Entrance),
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State(..),
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Game(..) )
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import RPGEngine.Data.Level (findAt, directionOffsets)
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------------------------------ Exported ------------------------------
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-- Check if a move is legal by checking what is located at the new position.
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isLegalMove :: Direction -> Game -> Bool
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isLegalMove dir g@Game{ state = Playing { level = lvl, player = p@Player{ position = (x, y) }}} = legality
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where legality = physical `elem` [Walkable, Entrance, Exit]
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physical = findAt newPos lvl
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newPos = (x + xD, y + yD)
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(xD, yD) = directionOffsets dir
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isLegalMove _ _ = False |