71 lines
2.6 KiB
Haskell
71 lines
2.6 KiB
Haskell
module Map.Creation
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where
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import Map.Types
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import Map.Map
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import Data.Array
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import System.Random
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-- Orphan instance since this isn't where either Random nor Tuples are defined
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instance (Random x, Random y) => Random (x, y) where
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randomR ((x1, y1), (x2, y2)) gen1 = let (a, gen2) = randomR (x1, x2) gen1
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(b, gen3) = randomR (y1, y2) gen2
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in ((a, b), gen3)
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random gen1 = let (a, gen2) = random gen1
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(b, gen3) = random gen2 in ((a,b), gen3)
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-- | Generate a new Map of given Type and Size
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--
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-- TODO:
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-- 1. Should take Size -> Type -> Playmap
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-- 2. plug together helper-functions for that terraintype
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newMap :: MapType -> (Int, Int) -> PlayMap
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newMap = undefined
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aplByPlace :: (Node -> Node) -> ((Int,Int) -> Bool) -> PlayMap -> PlayMap
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aplByPlace f g mp = array (bounds mp) (map (\(ab,c) -> if g ab then (ab, f c) else (ab,c)) (assocs mp))
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aplByNode :: (Node -> Node) -> (Node -> Bool) -> PlayMap -> PlayMap
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aplByNode f g mp = array (bounds mp) (map (\(ab,c) -> (if g c then (ab, f c) else (ab,c))) (assocs mp))
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aplAll :: [a -> a] -> a -> a
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aplAll fs m = foldl (\ n f -> f n) m fs
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-- general 3D-Gaussian
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gauss3Dgeneral :: Floating q =>
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q -- ^ Amplitude
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-> q -- ^ Origin on X-Achsis
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-> q -- ^ Origin on Z-Achsis
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-> q -- ^ Sigma on X
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-> q -- ^ Sigma on Z
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-> q -- ^ Coordinate in question on X
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-> q -- ^ Coordinate in question on Z
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-> q -- ^ elevation on coordinate in question
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gauss3Dgeneral amp x0 z0 sX sZ x z = amp * exp(-(((x-x0)^(2 :: Integer)/(2 * sX^(2 :: Integer)))+((z-z0)^(2 :: Integer)/(2 * sZ^(2 :: Integer)))))
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-- specialised 3D gaussian with an origin on 100/100, an amplitude of 15 and two sigmas of 15
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gauss3D :: Floating q =>
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q -- ^ X-Coordinate
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-> q -- ^ Z-Coordinate
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-> q -- ^ elevation on coordinate in quesion
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gauss3D = gauss3Dgeneral 15 100.0 100.0 15.0 15.0
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-- 2D Manhattan distance
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mnh2D :: (Int,Int) -> (Int,Int) -> Int
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mnh2D (a,b) (c,d) = abs (a-c) + abs (b-d)
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-- | Basic Terrain-Generator. Will not implement "abnormal" Stuff for given Biome
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-- (like Deserts on Grass-Islands or Grass on Deserts)
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--
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-- TODO: Implement Desert-Generator
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heightToTerrain :: MapType -> YCoord -> TileType
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heightToTerrain GrassIslandMap y
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| y < 0.1 = Ocean
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| y < 1 = Beach
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| y < 5 = Grass
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| y < 10 = Hill
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| otherwise = Mountain
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heightToTerrain _ _ = undefined
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