83 lines
2.4 KiB
Haskell
83 lines
2.4 KiB
Haskell
{-# LANGUAGE TemplateHaskell #-}
|
|
|
|
module AI.Vacuum.Grid where
|
|
|
|
import qualified Data.Map as M
|
|
import Data.Lens.Common
|
|
import Data.Lens.Template
|
|
import System.IO.Unsafe (unsafePerformIO)
|
|
import Debug.Trace (putTraceMsg)
|
|
|
|
trace :: String -> a -> a
|
|
trace string expr = unsafePerformIO $ do
|
|
putTraceMsg string
|
|
return expr
|
|
|
|
data Direction = North | East | South | West deriving (Eq, Show, Enum, Bounded)
|
|
data CellType = Empty | Furniture | Dirt | Home deriving (Eq, Show, Ord)
|
|
type Point = (Int, Int)
|
|
data Cell = Cell { _point :: Point, _cellType :: CellType } deriving (Eq, Show)
|
|
type Grid = M.Map Point Cell
|
|
|
|
makeLenses [''Cell]
|
|
|
|
class (Enum a, Eq a, Bounded a) => WrappedBoundedEnum a where
|
|
next :: a -> a
|
|
prev :: a -> a
|
|
|
|
next x = if (maxBound == x) then minBound else succ x
|
|
prev x = if (minBound == x) then maxBound else pred x
|
|
|
|
instance WrappedBoundedEnum Direction
|
|
|
|
right :: Direction -> Direction
|
|
right = next
|
|
|
|
left :: Direction -> Direction
|
|
left = prev
|
|
|
|
forwardPoint :: Point -> Direction -> Point
|
|
forwardPoint (x, y) North = (x, y - 1)
|
|
forwardPoint (x, y) East = (x + 1, y)
|
|
forwardPoint (x, y) South = (x, y + 1)
|
|
forwardPoint (x, y) West = (x - 1, y)
|
|
|
|
rightPoint :: Point -> Direction -> Point
|
|
rightPoint (x, y) North = (x + 1, y)
|
|
rightPoint (x, y) East = (x, y + 1)
|
|
rightPoint (x, y) South = (x - 1, y)
|
|
rightPoint (x, y) West = (x, y - 1)
|
|
|
|
leftPoint :: Point -> Direction -> Point
|
|
leftPoint (x, y) North = (x -1, y)
|
|
leftPoint (x, y) East = (x, y - 1)
|
|
leftPoint (x, y) South = (x + 1, y)
|
|
leftPoint (x, y) West = (x, y + 1)
|
|
|
|
lookupCell :: Point -> Grid -> Maybe Cell
|
|
lookupCell = M.lookup
|
|
|
|
forwardCell :: Cell -> Direction -> Grid -> Maybe Cell
|
|
forwardCell (Cell point _) = lookupCell . (forwardPoint point)
|
|
|
|
rightCell :: Cell -> Direction -> Grid -> Maybe Cell
|
|
rightCell (Cell point _) = lookupCell . (rightPoint point)
|
|
|
|
leftCell :: Cell -> Direction -> Grid -> Maybe Cell
|
|
leftCell (Cell point _) = lookupCell . (leftPoint point)
|
|
|
|
gridFromCellList :: [Cell] -> Grid
|
|
gridFromCellList = foldl (\m cell@(Cell p _) -> M.insert p cell m) M.empty
|
|
|
|
freqMap :: (Ord a) => [a] -> [(a, Int)]
|
|
freqMap = M.toList . foldl (\m t -> M.insertWith (+) t 1 m) M.empty
|
|
|
|
gridWidth :: Grid -> Int
|
|
gridWidth = (+ 1) . maximum . map fst . M.keys
|
|
|
|
gridHeight :: Grid -> Int
|
|
gridHeight = (+ 1) . maximum . map snd . M.keys
|
|
|
|
gridStats :: Grid -> [(CellType, Int)]
|
|
gridStats = freqMap . map (cellType ^$) . M.elems
|