Forgot Combinator module

src/Map/Combinators.hs

@@ -0,0 +1,46 @@
+module Map.Combinators where
+
+import Map.Types
+import Map.Creation
+
+import Data.Array
+import System.Random
+
+-- preliminary
+infix 5 ->-
+(->-) :: (PlayMap -> PlayMap) -> (PlayMap -> PlayMap) -> (PlayMap -> PlayMap)
+f ->- g = (g . f)
+
+-- also preliminary
+infix 5 -<-
+(-<-) :: (PlayMap -> PlayMap) -> (PlayMap -> PlayMap) -> (PlayMap -> PlayMap)
+f -<- g = (f . g)
+
+lake :: Int -> PlayMap -> PlayMap
+lake = undefined
+
+river :: Int -> PlayMap -> PlayMap
+river = undefined
+
+mnt :: IO [PlayMap -> PlayMap]
+mnt = do g <- newStdGen
+         let seeds = take 10 $ randoms g
+         return $ map gaussMountain seeds
+
+gaussMountain :: Int -> PlayMap -> PlayMap
+gaussMountain seed mp = aplByPlace (liftUp c) (\(_,_) -> True) mp
+  where
+    g   = mkStdGen seed
+    c   = head $ randomRs (bounds mp) g
+    amp = head $ randomRs (5.0, 20.0) g
+    sig = head $ randomRs (5.0, 25.0) g
+    fi  = fromIntegral
+    htt = heightToTerrain
+
+    -- TODO: Fix Lambda to True with sensible function, maybe rework giveNeighbourhood in Map.Map
+    liftUp :: (Int, Int) -> Node -> Node
+    liftUp (gx,gz) (Full     (x,z) y _ b pl pa r s) = let y_neu = max y e
+                                                      in  (Full (x,z) y_neu (htt GrassIslandMap y_neu) b pl pa r s)
+      where e = gauss3Dgeneral amp (fi gx) (fi gz) sig sig (fi x) (fi z)
+    liftUp (gx, gz) (Minimal (x,z)) = Full (x,z) e (htt GrassIslandMap e) BFlag NoPlayer NoPath Plain []
+      where e = gauss3Dgeneral amp (fi gx) (fi gz) sig sig (fi x) (fi z)