52 lines
1.9 KiB
Haskell
52 lines
1.9 KiB
Haskell
|
module Minesweeper where
|
||
|
|
||
|
import System.Random
|
||
|
|
||
|
type Square = (Int, Int)
|
||
|
type Grid = [[Bool]]
|
||
|
|
||
|
data Board = Board { size :: Int
|
||
|
, mines :: Grid
|
||
|
, uncovered :: Grid
|
||
|
, flagged :: Grid
|
||
|
} deriving (Show)
|
||
|
|
||
|
-- Creates a board given a size (width/height), mine ratio and random generator
|
||
|
createBoard :: Int -> Float -> StdGen -> Board
|
||
|
createBoard size mineRatio rng = Board size (seedGrid rng mineRatio (createGrid size)) (createGrid size) (createGrid size)
|
||
|
|
||
|
-- Creates a 2D list of booleans of given size, initialised to False
|
||
|
createGrid :: Int -> Grid
|
||
|
createGrid size = replicate size (replicate size False)
|
||
|
|
||
|
-- Functions relating to seeding a grid with mines
|
||
|
seedGrid :: StdGen -> Float -> Grid -> Grid
|
||
|
seedGrid _ _ [] = []
|
||
|
seedGrid rng p (l:ls) = newL : seedGrid rng2 p ls
|
||
|
where (rng1, rng2) = split rng
|
||
|
(newL, _) = seedList rng1 p l
|
||
|
|
||
|
seedList :: StdGen -> Float -> [Bool] -> ([Bool], StdGen)
|
||
|
seedList rng p (l:ls) = (newBool : seedList2 newRng p ls, newRng)
|
||
|
where (newBool, newRng) = randomlyTrue rng p
|
||
|
|
||
|
seedList2 :: StdGen -> Float -> [Bool] -> [Bool]
|
||
|
seedList2 _ _ [] = []
|
||
|
seedList2 rng p (l:ls) = newBool : seedList2 newRng p ls
|
||
|
where (newBool, newRng) = randomlyTrue rng p
|
||
|
|
||
|
randomlyTrue :: StdGen -> Float -> (Bool, StdGen)
|
||
|
randomlyTrue rng p = (generatedFloat <= p, newRng)
|
||
|
where (generatedFloat, newRng) = randomR (0.0, 1.0) rng
|
||
|
|
||
|
-- Functions for turning a board into a string for debug purposes
|
||
|
printBoard :: Board -> String
|
||
|
printBoard b = printBoardGrid (mines b)
|
||
|
|
||
|
printBoardGrid :: Grid -> String
|
||
|
printBoardGrid [] = ""
|
||
|
printBoardGrid (l:ls) = printBoardLine l ++ "\n" ++ printBoardGrid ls
|
||
|
|
||
|
printBoardLine :: [Bool] -> String
|
||
|
printBoardLine [] = ""
|
||
|
printBoardLine (x:xs) = (if x then " x" else " .") ++ printBoardLine xs
|