63 lines
1.7 KiB
Haskell
63 lines
1.7 KiB
Haskell
{-# LANGUAGE LambdaCase #-}
|
|
module Main where
|
|
|
|
import Data.List
|
|
import Data.List.Split
|
|
import Data.List.Utils
|
|
import qualified Data.Map.Strict as M
|
|
import Data.Maybe
|
|
import Helpers
|
|
import Linear.V2
|
|
|
|
type DungeonMap = M.Map (V2 Int) Char
|
|
|
|
main :: IO ()
|
|
main = do
|
|
map <- updateScreenBuffer M.empty (0, 0) <$> readFile "testinput1"
|
|
putStrLn $ drawMap map
|
|
let spos = findPos '@' map
|
|
let epos = findPos 'e' map
|
|
print $ getNeighbors map spos
|
|
print $ getNeighborsMap map (getNeighbors map spos)
|
|
print $ distanceFromTo map '@' 'd'
|
|
|
|
updateScreenBuffer :: DungeonMap -> (Int, Int) -> String -> DungeonMap
|
|
updateScreenBuffer buf _ [] = buf
|
|
updateScreenBuffer buf (x, y) (a:as) = updateScreenBuffer bufNew coord as
|
|
where
|
|
bufNew =
|
|
if a /= '\n'
|
|
then M.insert (V2 x y) a buf
|
|
else buf
|
|
coord =
|
|
if a /= '\n'
|
|
then (x + 1, y)
|
|
else (0, y + 1)
|
|
|
|
getNeighbors :: DungeonMap -> V2 Int -> DungeonMap
|
|
getNeighbors m coord =
|
|
M.fromList
|
|
[ (u + coord, M.findWithDefault '#' (u + coord) m)
|
|
| u <- unitVecs
|
|
, M.findWithDefault '#' (u + coord) m /= '#'
|
|
]
|
|
|
|
getNeighborsMap :: DungeonMap -> DungeonMap -> DungeonMap
|
|
getNeighborsMap m n = M.unions [getNeighbors m x | (x, _) <- M.toList n]
|
|
|
|
distanceFromTo :: DungeonMap -> Char -> Char -> Int
|
|
distanceFromTo dmap schar echar =
|
|
distanceFromTo' dmap (M.singleton spos schar) spos epos 1
|
|
where
|
|
spos = findPos schar dmap
|
|
epos = findPos echar dmap
|
|
distanceFromTo' mMap nMap start end n =
|
|
if M.member end newNMap
|
|
then n
|
|
else distanceFromTo' mMap newNMap start end (n + 1)
|
|
where
|
|
newNMap = M.union nMap (getNeighborsMap mMap nMap)
|
|
|
|
findPos :: Char -> DungeonMap -> V2 Int
|
|
findPos c = head . M.keys . M.filter (`elem` [c])
|