5b2537188f
=(^.^)=
(")_(") bunny approves this commit!
(rewrote the whole damn camera-height-function.
Should be better now.)
92 lines
3.4 KiB
Haskell
92 lines
3.4 KiB
Haskell
module Map.Creation
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where
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import Map.Types
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import Data.Array
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import System.Random
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-- entirely empty map, only uses the minimal constructor
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mapEmpty :: PlayMap
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mapEmpty = array ((0,0), (199,199)) [((a,b), Node (a,b) (fromIntegral a, (if even b then (fromIntegral b) else(fromIntegral b) - 0.5), 1) Grass BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199]]
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exportedMap :: IO PlayMap
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exportedMap = do mounts <- mnt
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return $ aplAll mounts mapEmpty
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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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aplAllM :: Monad m => [m a -> m a] -> m a -> m a
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aplAllM fs x = foldl (\ n f -> f n) x 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 :: Int)/(2 * sX^(2 :: Int)))+((z-z0)^(2 :: Int)/(2 * sZ^(2 :: Int)))))
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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 < 0.2 = Beach
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| y < 1.5 = Grass
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| y < 3 = Hill
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| otherwise = Mountain
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heightToTerrain _ _ = undefined
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lake :: Int -> PlayMap -> PlayMap
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lake = undefined
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river :: Int -> PlayMap -> PlayMap
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river = undefined
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mnt :: IO [PlayMap -> PlayMap]
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mnt = do g <- newStdGen
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let seeds = take 50 $ randoms g
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return $ map gaussMountain seeds
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gaussMountain :: Int -> PlayMap -> PlayMap
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gaussMountain seed mp = aplByPlace (liftUp c) (\(_,_) -> True) mp
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where
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gs = map mkStdGen (map (*seed) [1..])
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c = let ((a,b), (x,y)) = bounds mp in (head (randomRs (a,x) (gs !! 0)), (head (randomRs (b,y) (gs !! 1))))
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amp = head $ randomRs ((2.0, 5.0) :: (Double, Double)) (gs !! 2)
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sig = head $ randomRs ((2.0, 8.0) :: (Double, Double)) (gs !! 3)
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htt = heightToTerrain
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-- TODO: Fix Lambda to True with sensible function, maybe rework giveNeighbourhood in Map.Map
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liftUp :: (Int, Int) -> Node -> Node
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liftUp (gx,gz) (Node (x,z) (rx,rz,y) _ b pl pa r s) = let y_neu = max y e
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in Node (x,z) (rx, rz, y_neu) (htt GrassIslandMap y_neu) b pl pa r s
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where e = gauss3Dgeneral amp (fromIntegral gx) (fromIntegral gz) sig sig rx rz
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-- | Makes sure the edges of the Map are mountain-free
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makeIsland :: PlayMap -> PlayMap
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makeIsland = undefined -- tomorrow....
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