-module Sim ( initSimSpace, testSim, physStep, updateWaterChunk, validDirects ) where
+module Sim (
+ Simulation, simSpace,
+ ChunkType, ChunkData, chunkType,
+ initSimSpace, testSim, physStep, updateWaterChunk, validDirects, simToString
+) where
import Debug.Trace
import Data.Vector ((!), (//))
(\q -> 0 <= (fst q) && (fst q) < w && (snd q) <= 0 && (snd q) < h)
[(a-x,b-y) | a <- [x-1..x+1], b <- [y-1..y+1], not (a==x && b==y)]
+simToString :: Simulation -> [Char]
+simToString sim@Simulation{simW=w} =
+ let simStr = V.toList $ V.map chunkToChar $ simSpace sim
+ in insert w '\n' simStr
+
+-- from https://stackoverflow.com/questions/12659562/insert-specific-element-y-after-every-n-elements-in-a-list
+insert :: Int -> a -> [a] -> [a]
+insert n y xs = countdown n xs where
+ countdown 0 xs = y:countdown n xs
+ countdown _ [] = []
+ countdown m (x:xs) = x:countdown (m-1) xs
+
+chunkToChar :: ChunkData -> Char
+chunkToChar c =
+ case chunkType c of
+ Water -> '~'
+ Air -> '.'
+ _ -> '?'
