merged

Pioneers.cabal

@@ -16,7 +16,6 @@ executable Pioneers
                    Map.Types,
                    Map.Graphics,
                    Map.Creation,
-                   Map.StaticMaps,
                    Importer.IQM.Types,
                    Importer.IQM.Parser,
                    Render.Misc,

src/Map/Creation.hs

@@ -2,7 +2,6 @@ module Map.Creation
 where
 
 import Map.Types
-import Map.StaticMaps
 -- import Map.Map unused (for now)
 
 import Data.Array
@@ -18,6 +17,10 @@ infix 5 -<-
 (-<-) :: (PlayMap -> PlayMap) -> (PlayMap -> PlayMap) -> PlayMap -> PlayMap
 f -<- g = f . g
 
+-- entirely empty map, only uses the minimal constructor
+mapEmpty :: PlayMap
+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]]
+
 exportedMap :: IO PlayMap
 exportedMap = do mounts <- mnt
                  return $ aplAll mounts mapEmpty
@@ -52,7 +55,7 @@ gauss3Dgeneral :: Floating q =>
                   -> q -- ^ Coordinate in question on X
                   -> q -- ^ Coordinate in question on Z
                   -> q -- ^ elevation on coordinate in question
-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)))))
+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)))))
 
 -- specialised 3D gaussian with an origin on 100/100, an amplitude of 15 and two sigmas of 15
 gauss3D :: Floating q =>
@@ -93,20 +96,17 @@ mnt = do g <- newStdGen
 gaussMountain :: Int -> PlayMap -> PlayMap
 gaussMountain seed mp = aplByPlace (liftUp c) (\(_,_) -> True) mp
   where
-    g   = mkStdGen seed
+    gs  = map mkStdGen (map (*seed) [1..])
-    c   = let ((a,b), (x,y)) = bounds mp in (head (randomRs (a,x) g), (head (randomRs (b,y) g)))
+    c   = let ((a,b), (x,y)) = bounds mp in (head (randomRs (a,x) (gs !! 0)), (head (randomRs (b,y) (gs !! 1))))
-    amp = head $ randomRs (2.0, 5.0) g
+    amp = head $ randomRs ((2.0, 5.0) :: (Float, Float)) (gs !! 2)
-    sig = head $ randomRs (1.0, 5.0) g
+    sig = head $ randomRs ((1.0, 15.0) :: (Float, Float)) (gs !! 3)
-    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
+    liftUp (gx,gz) (Node (x,z) (rx,rz,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
+                                                          in  Node (x,z) (rx, rz, 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)
+      where e = gauss3Dgeneral amp (fromIntegral gx) (fromIntegral gz) sig sig rx rz
-    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)
 
 -- | Makes sure the edges of the Map are mountain-free
 makeIsland :: PlayMap -> PlayMap

src/Map/Graphics.hs

@@ -50,16 +50,14 @@ stripify :: (Int,Int) -> (Int,Int)
 stripify (x,z) = (if even z then 2*x else 2*x+1, z `div` 2)
 
 strp :: Node -> Node
-strp (Full    xz y tt bi pli p ri si) = Full    (stripify xz) y tt bi pli p ri si
+strp (Node i (x,z,y) tt bi pli p ri si) = Node (stripify i) (x,z,y) tt bi pli p ri si
-strp (Minimal xz                    ) = Minimal (stripify xz)
 
 -- extract graphics information from Playmap
 convertToGraphicsMap :: PlayMap -> GraphicsMap
 convertToGraphicsMap mp = array (bounds mp) [(i, graphicsyfy (mp ! i))| i <- indices mp]
     where
       graphicsyfy :: Node -> MapEntry
-      graphicsyfy (Minimal _               ) = (1.0, Grass)
+      graphicsyfy (Node _ (_,_,y) t _ _ _ _ _ ) = (y, t)
-      graphicsyfy (Full    _ y t _ _ _ _ _ ) = (y, t)
 
 lineHeight :: GLfloat
 lineHeight = 0.8660254
@@ -203,8 +201,8 @@ colorLookup hs t = if inRange (bounds hs) t then c else (0.0, 0.0, 0.0)
                                 Beach           -> (0.90, 0.85, 0.70)
                                 Desert          -> (1.00, 0.87, 0.39)
                                 Grass           -> (0.30, 0.90, 0.10)
-                                Hill            -> (0.80, 0.80, 0.80)
+                                Mountain        -> (0.80, 0.80, 0.80)
-                                Mountain        -> (0.50, 0.50, 0.50)
+                                Hill            -> (0.50, 0.50, 0.50)
 
 coordLookup :: (Int,Int) -> GLfloat -> V3 GLfloat
 coordLookup (x,z) y =

src/Map/Map.hs

@@ -1,9 +1,11 @@
 module Map.Map where
 
 import Map.Types
+import Map.Creation
 
-import Data.Array (bounds)
+import Data.Function (on)
-import Data.List  (sort, group)
+import Data.Array    (bounds, (!))
+import Data.List     (sort, sortBy, group)
 
 -- WARNING: Does NOT Check for neighbours exceeding maximum map coordinates yet.
 unsafeGiveNeighbours :: (Int, Int)  -- ^ original coordinates
@@ -36,6 +38,57 @@ giveNeighbourhood _  0 (a,b) = [(a,b)]
 giveNeighbourhood mp n (a,b) = let ns = giveNeighbours mp (a,b) in 
                              remdups . concat $ ns : map (giveNeighbourhood mp (n-1)) ns
 
+-- | Calculates the height of any given point on the map.
+-- Does not add camera distance to ground to that.
+-- 
+-- This ueses barycentric coordinate stuff. Wanna read more?
+-- http://en.wikipedia.org/wiki/Barycentric_coordinate_system_%28mathematics%29
+-- http://www.alecjacobson.com/weblog/?p=1596
+--
+giveMapHeight :: PlayMap
+              -> (Float, Float)  -- ^ Coordinates on X/Z-axes 
+              -> Float           -- ^ Terrain Height at that position
+giveMapHeight mp (x,z) = let [a,b,c] = getTrianglePoints [tff,tfc,tcf,tcc]
+                             ar = area (fi a) (fi b) (fi c)
+                             λa = area (fi b) (fi c) (x, z) / ar
+                             λb = area (fi a) (fi c) (x, z) / ar
+                             λc = area (fi a) (fi b) (x, z) / ar
+                         in  (λa * hlu a) + (λb * hlu b) + (λc * hlu c)
+  where
+
+    fi :: (Int, Int) -> (Float, Float)
+    fi (m, n) = (fromIntegral m, fromIntegral n)
+
+    -- Height LookUp
+    hlu :: (Int, Int) -> Float
+    hlu (k,j) = let (Node _ (_,_,y) _ _ _ _ _ _) = mp ! (k,j) in y
+
+    ff  = (floor   x, floor   z) :: (Int, Int)
+    fc  = (floor   x, ceiling z) :: (Int, Int)
+    cf  = (ceiling x, floor   z) :: (Int, Int)
+    cc  = (ceiling x, ceiling z) :: (Int, Int)
+
+    tff = (ff, dist (x,z) ff)
+    tfc = (fc, dist (x,z) fc)
+    tcf = (cf, dist (x,z) cf)
+    tcc = (cc, dist (x,z) cc)
+
+    getTrianglePoints :: [((Int,Int), Float)] -> [(Int,Int)]
+    getTrianglePoints = ((take 3) . (map fst) . (sortBy (compare `on` snd)))
+
+    dist :: (Float, Float) -> (Int, Int) -> Float
+    dist (x1,z1) (x2,z2) = let x' = x1 - fromIntegral x2
+                               z' = z1 - fromIntegral z2
+                           in  sqrt $ x'*x' + z'*z'
+
+    -- Heron's Formula: http://en.wikipedia.org/wiki/Heron%27s_formula
+    area :: (Float, Float) -> (Float, Float) -> (Float, Float) -> Float
+    area (x1,z1) (x2,z2) (x3,z3) = let a = sqrt $ (x1-x2)*(x1-x2) + (z1-z2)*(z1-z2)
+                                       b = sqrt $ (x2-x3)*(x2-x3) + (z2-z3)*(z2-z3)
+                                       c = sqrt $ (x1-x3)*(x1-x3) + (z1-z3)*(z1-z3)
+                                       s = (a+b+c)/2 
+                                   in  sqrt $ s * (s-a) * (s-b) * (s-c)
+
 -- removing duplicates in O(n log n), losing order and adding Ord requirement
 remdups :: Ord a => [a] -> [a]
 remdups = map head . group . sort

src/Map/StaticMaps.hs

@@ -1,49 +0,0 @@
-module Map.StaticMaps
-where
-
-import Map.Types
-import Data.Array
-
--- entirely empty map, only uses the minimal constructor
-mapEmpty :: PlayMap
-mapEmpty = array ((0,0), (199,199)) [((a,b), Minimal (a,b)) | a <- [0..199], b <- [0..199]]
-
---mapCenterMountain :: PlayMap
---mapCenterMountain = array ((0,0),(199,199)) nodes
---    where
---      nodes    = water ++ beach ++ grass ++ hill ++ mountain
---      water    = [((a,b), Full (a,b) 0.0       Ocean    BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199], m2d (a,b) > 95]
---      beach    = [((a,b), Full (a,b) (g2d a b) Beach    BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199], m2d (a,b) <= 95, m2d (a,b) > 75]
---      grass    = [((a,b), Full (a,b) (g2d a b) Grass    BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199], m2d (a,b) <= 75, m2d (a,b) > 25]
---      hill     = [((a,b), Full (a,b) (g2d a b) Hill     BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199], m2d (a,b) <= 25, m2d (a,b) > 10]
---      mountain = [((a,b), Full (a,b) (g2d a b) Mountain BNothing NoPlayer NoPath Plain []) | a <- [0..199], b <- [0..199], m2d (a,b) <= 10]
-
---      g2d :: Int -> Int -> Float
---      g2d x y = gauss3D (fromIntegral x) (fromIntegral y)
-
---      m2d :: (Int,Int) -> Int
---      m2d (x,y) = mnh2D (x,y) (100,100)
-
--- small helper for some hills. Should be replaced by multi-layer perlin-noise
--- TODO: Replace as given in comment.
---_noisyMap :: (Floating q) => q -> q -> q
---_noisyMap x y =    gauss3Dgeneral 15 100.0 100.0 15.0 15.0 x y
---                +  gauss3Dgeneral 5  10.0 10.0 10.0 10.0 x y
---                +  gauss3Dgeneral 5  150.0 120.0 10.0 10.0 x y
---                +  gauss3Dgeneral 5  50.0 75.0 10.0 10.0 x y
-
--- generates a noisy map
--- TODO: add real noise to a simple pattern
---mapNoise :: PlayMap
---mapNoise = array ((0,0),(199,199)) nodes
---    where
---      nodes    = [((a,b), Full (a,b)
---                               (height a b)
---                               (heightToTerrain GrassIslandMap $ height a b)
---                               BNothing
---                               NoPlayer
---                               NoPath
---                               Plain
---                               []) | a <- [0..199], b <- [0..199]]
---                 where
---                    height a b = _noisyMap (fromIntegral a) (fromIntegral b)

src/Map/Types.hs

@@ -5,10 +5,12 @@ import Types
 
 import Data.Array
 
-type PlayMap = Array (XCoord, ZCoord) Node 
+type PlayMap = Array (Xindex, Zindex) Node 
 
-type XCoord  = Int
+type Xindex  = Int
-type ZCoord  = Int
+type Zindex  = Int
+type XCoord  = Float
+type ZCoord  = Float
 type YCoord  = Float
 
 data MapType    = GrassIslandMap
@@ -66,7 +68,6 @@ data TileType   = Ocean
                 | Mountain -- ^ Not accessible
                 deriving (Show, Eq)
 
--- TODO: Record Syntax
+-- TODO: Record Syntax?
-data Node = Full    (XCoord, ZCoord) YCoord TileType BuildInfo PlayerInfo PathInfo ResInfo StorInfo
+data Node = Node (Xindex, Zindex) (XCoord, ZCoord, YCoord) TileType BuildInfo PlayerInfo PathInfo ResInfo StorInfo
-          | Minimal (XCoord, ZCoord) -- defaults to empty green grass node on height 1
           deriving (Show)