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Halma.hs
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Halma.hs
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-----------
-- Halma --
-----------
module Halma (Halma, halma) where
import Game
import Data.Array
-- import Graphics.UI.WX
import Graphics.UI.WX hiding (border, empty, point)
import Graphics.UI.WXCore hiding (empty, point)
import Tools
data Halma = Halma (Array (Int, Int) (Maybe Player)) deriving (Eq, Show)
type HalmaMove = ((Int, Int), (Int, Int))
halma :: Halma
halma = undefined
instance Game Halma where
name _ = "halma"
standard _ = Properties { players = 2, boardsize = 8, human = [True, False, False, False, False, False] }
possible _ = PropertyRange { playersrange = [2, 3, 4, 6], boardsizerange = [8] }
new pr = let empty = [((x, y), Nothing) | x <- [-8 .. 8], y <- [-8 .. 8]]
in Halma $ array ((-8, -8), (8, 8)) empty // concatMap (\p -> map (\t -> (t, Just p)) $ startpos $ pos pr p) [0 .. players pr - 1]
moves pr p (Halma s) = map (move pr) (allMoves pr p s)
showmove pr p (Halma s) i = let ((x1, y1), (x2, y2)) = allMoves pr p s !! i
in "abcdefghijklmnopq" !! (x1 + 8) : show (9 - y1) ++ "-" ++ "abcdefghijklmnopq" !! (x2 + 8) : show (9 - y2)
value pr p (Halma st) | null $ allMoves pr p st = let winners = map snd $ filter (\(d, _) -> d == 20) $ zip totaldists [0..]
in foldr ($) (replicate (players pr) (-1)) $ map (|> 1) winners
| otherwise = map myvalue [0 .. players pr - 1]
where
totaldists :: [Int]
totaldists = map totaldist [0 .. players pr - 1]
totaldist :: Player -> Int
totaldist p' = let mypieces = map (\(i, _e) -> i) $ filter (\(_i, e) -> e == Just p') $ assocs st
in sum $ map (dist pr p') mypieces
myvalue :: Player -> Float
myvalue p' = let d = sum (map totaldist [0 .. players pr - 1]) - (players pr) * totaldist p'
in (fromInteger . toInteger) d / (fromInteger . toInteger) (120 * (players pr))
board p pr vart _ia move' = do
marble <- bitmapCreateLoad "images\\marble.bmp" wxBITMAP_TYPE_ANY
varg <- varCreate $ grate rectZero 0 (0, 0) sizeZero
vare <- varCreate (Nothing :: Maybe (Int, Int))
let
onpaint :: DC () -> Rect -> IO ()
onpaint dc r = do
t <- varGet vart
e <- varGet vare
b_ <- border dc (16, 16)
let g_ = grate r b_ (26, 17) (Size 4 7)
b <- fit dc (16, 16) $ rectWidth (field g_ (0, 0))
let Halma st = state t
g = grate r b (26, 17) (Size 4 7)
radius = rectHeight (field g (0, 0)) `div` 3
lin' :: Rect -> Rect -> IO ()
lin' (Rect x1 y1 w1 h1) (Rect x2 y2 w2 h2) = do
line dc (pt (x1 + w1) (y1 + h1 `div` 2)) (pt (x2 + w2) (y2 + h2 `div` 2)) []
lin :: (Int, Int) -> (Int, Int) -> IO ()
lin p' q = lin' (field g $ tograte p') (field g $ tograte q)
varSet varg g
tileBitmap dc r marble
--{ drawGrate dc g [penColor := yellow]
for 0 16 (\j -> do
let i = head $ dropWhile (\i' -> inside $ fromgrate (i', j)) [13 ..]
drawTextRect dc (show $ 17 - j) $ field g ( i - 1, j) |#| field g ( i, j)
drawTextRect dc (show $ 17 - j) $ field g (25 - i, j) |#| field g (26 - i, j)
let d = (i - 1 + 3 * j) `div` 2 - 18
e' = (25 - i + 3 * j) `div` 2 - 18
drawTextRect dc [['A' ..] !! (16 - j)] $ field g (i - 1 - d, j - d) |#| field g (i - 1 - d, j - 1 - d)
drawTextRect dc [['A' ..] !! (16 - j)] $ field g (25 - i - e', j - e') |#| field g (25 - i - e', j - 1 - e')
)
for 0 4 (\n -> do
lin ( - 4, n - 8) (n - 4, n - 8)
lin (n - 8, n - 4) ( 4, n - 4)
lin ( - 4, n ) (n + 4, n )
lin (n , n + 4) ( 4, n + 4)
lin (n - 8, - 4) (n - 8, n - 4)
lin (n - 4, n - 8) (n - 4, 4)
lin (n , - 4) (n , n + 4)
lin (n + 4, n ) (n + 4, 4)
lin ( - 4, -n + 4) (n - 4, 4)
lin (n - 8, - 4) ( 4, -n + 8)
lin ( - 4, -n - 4) (n + 4, 4)
lin (n , - 4) ( 4, -n )
)
for 0 24 (\i -> for 0 16 (\j ->
when (even (i + j)) $ when (inside $ fromgrate (i, j)) $
drawPiece dc (field g (i, j)) radius (st ! fromgrate (i, j))
) )
case e of Just p' -> drawBrightPiece dc (field g $ tograte p') radius
Nothing -> return ()
onclick :: Point -> IO ()
onclick point = do
t <- varGet vart
e <- varGet vare
g <- varGet varg
let Halma st = state t
n = fromgrate $ locate g point
case (e, inside n) of
(Nothing, True ) -> when (st ! n == Just (player t)) $ varSet vare (Just n) >> repaint p
(_ , False) -> varSet vare Nothing >> repaint p
(Just te, True ) -> case lookup (te, n) $ zip (allMoves pr (player t) st) [0..] of
Nothing -> varSet vare Nothing >> repaint p
Just i -> varSet vare Nothing >> repaint p >> move' i
set p [ on click := onclick
, on unclick := onclick
, on paint := onpaint
, on resize ::= repaint
]
return ()
fit :: DC () -> (Int, Int) -> Int -> IO Int
fit dc t m = do
s <- get dc fontSize
fit_ dc (s + 6)
where
fit_ :: DC () -> Int -> IO Int
fit_ _dc 1 = border dc t
fit_ dc' s = do
set dc' [fontSize := s - 1]
b <- border dc t
if b <= m then return b
else fit_ dc' (s - 1)
drawPiece :: DC () -> Rect -> Int -> Maybe Player -> IO ()
drawPiece dc (Rect x y w h) r mp = circle dc (pt (x + w) (y + h `div` 2)) r [brushColor := col mp]
drawBrightPiece :: DC () -> Rect -> Int -> IO ()
drawBrightPiece dc (Rect x y w h) r = circle dc (pt (x + w) (y + h `div` 2)) r [brushKind := BrushTransparent, penWidth := 3, penColor := yellow]
tograte :: (Int, Int) -> (Int, Int)
tograte (i, j) = (12 + 2 * i - j, 8 + j)
fromgrate :: (Int, Int) -> (Int, Int)
fromgrate (i, j) = (-10 + (i + j) `div` 2, -8 + j)
-- x = ½ (i + j) - 10
-- y = j - 8
col :: Maybe Player -> Color
col p = case p of
Nothing -> white
Just 0 -> blue
Just 1 -> red
Just 2 -> green
Just 3 -> rgb 160 0 (192 :: Int)
Just 4 -> rgb 192 128 (0 :: Int)
Just 5 -> grey
_ -> black
(+-) :: Num a => (a, a) -> (a, a) -> (a, a)
(a, b) +- (c, d) = (a + c, b + d)
allMoves :: Properties -> Player -> Array (Int, Int) (Maybe Player) -> [HalmaMove]
allMoves pr p st | p == 0 && 20 `elem` (map totaldist [0 .. players pr - 1]) = []
| otherwise = stepmoves ++ jumpmoves
where
mypieces :: Player -> [(Int, Int)]
mypieces p' = map (\(i, _e) -> i) $ filter (\(_i, e) -> e == Just p') $ assocs st
stepmoves :: [HalmaMove]
stepmoves = let potmoves = concatMap (\t -> map (\s -> (t, t +- s)) $ steps pr p) (mypieces p)
in filter (\(_f, t) -> inside t && st ! t == Nothing) potmoves
jumpmoves :: [HalmaMove]
jumpmoves = concatMap (\t -> map (\s -> (t, s)) $ floodfill t []) (mypieces p)
floodfill :: (Int, Int) -> [(Int, Int)] -> [(Int, Int)]
floodfill t fs = let news = map (\j -> t +- j +- j)
$ filter (\j -> let u = t +- j +- j
in inside u
&& st ! (t +- j) /= Nothing
&& st ! u == Nothing
&& not (u `elem` fs)
)
$ halfjumps
in foldr ($) fs $ map (\u -> floodfill u . (u :)) news
totaldist :: Player -> Int
totaldist p' = sum $ map (dist pr p') $ mypieces p'
steps :: Properties -> Player -> [(Int, Int)]
steps pr p = steppos (pos pr p)
where
steppos 0 = [( 1, 1), ( 1, 0), ( 0, -1), (-1, -1)]
steppos 1 = [( 0, 1), ( 1, 1), ( 1, 0), ( 0, -1)]
steppos 2 = [(-1, 0), ( 0, 1), ( 1, 1), ( 1, 0)]
steppos 3 = [(-1, -1), (-1, 0), ( 0, 1), ( 1, 1)]
steppos 4 = [( 0, -1), (-1, -1), (-1, 0), ( 0, 1)]
steppos 5 = [( 1, 0), ( 0, -1), (-1, -1), (-1, 0)]
steppos _ = error "steps: Unexpected value"
{-
jumps :: [(Int, Int)]
jumps = map (\(x, y) -> (2 * x, 2 * y)) halfjumps
-}
halfjumps :: [(Int, Int)]
halfjumps = [(1, 1), (1, 0), (0, -1), (-1, -1), (-1, 0), (0, 1)]
dist :: Properties -> Player -> (Int, Int) -> Int
dist pr p t = distpos (pos pr p) t
where
distpos 0 (x, y) = 8 - x + y + max 0 (-4 + x ) + max 0 (-4 - y )
distpos 1 (x, y) = 8 - x + max 0 (-4 + x - y) + max 0 (-4 + y )
distpos 2 (x, y) = 8 - y + max 0 (-4 + x ) + max 0 (-4 + y - x)
distpos 3 (x, y) = 8 + x - y + max 0 (-4 - x ) + max 0 (-4 + y )
distpos 4 (x, y) = 8 + x + max 0 (-4 - x + y) + max 0 (-4 - y )
distpos 5 (x, y) = 8 + y + max 0 (-4 - x ) + max 0 (-4 - y + x)
distpos _ _ = error "dist: Unexpected value"
move :: Properties -> HalmaMove -> (Player, Halma) -> (Player, Halma)
move pr (f, t) (p, Halma s) = ( (p + 1) `mod` players pr
, Halma $ s // [(f, Nothing), (t, Just p)]
)
startpos :: (Eq t, Num t, Num t1, Enum t1) => t -> [(t1, t1)]
startpos 0 = [(x, y) | x <- [-4 .. -1], y <- [x + 5 .. 4]]
startpos 1 = [(x, y) | x <- [-8 .. -5], y <- [ - 4 .. x + 4]]
startpos 2 = [(x, y) | x <- [-4 .. -1], y <- [x - 4 .. - 5]]
startpos 3 = [(x, y) | x <- [ 1 .. 4], y <- [ - 4 .. x - 5]]
startpos 4 = [(x, y) | x <- [ 5 .. 8], y <- [x - 4 .. 4]]
startpos 5 = [(x, y) | x <- [ 1 .. 4], y <- [ 5 .. x + 4]]
startpos _ = error "startpos: Unexpected value"
pos :: Properties -> Player -> Int
pos pr p | players pr == 2 = [0, 3 ] !! p
| players pr == 3 = [0, 2, 4 ] !! p
| players pr == 4 = [0, 1, 3, 4] !! p
| players pr == 6 = p
| otherwise = error "pos: Unexpected value"
inside :: (Int, Int) -> Bool
inside (x, y) = (x >= -4 && y <= 4 && x <= y + 4)
|| (y >= -4 && x <= 4 && y <= x + 4)
{- the halmaboard internally looks like this:
y/j
-8 ....x............
-7 ....xx...........
-6 ....xxx..........
-5 ....xxxx.........
-4 xxxx*****xxxx....
-3 .xxx******xxx....
-2 ..xx*******xx....
-1 ...x********x....
0 ....*********....
1 ....x********x...
2 ....xx*******xx..
3 ....xxx******xxx.
4 ....xxxx*****xxxx
5 .........xxxx....
6 ..........xxx....
7 ...........xx....
8 ............x....
87654321012345678 x/i
--------
-}