X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FValues.hs;h=b5dc15a9c6299bb0ec74511a8e561d6c0bdcf09a;hb=d910ddbbb9e6b9c8bf8169ce30c42660ad8746d4;hp=bd7c4d66af25ba443a6afe7f72d7bc6885df7f3b;hpb=883ce9d78072c492000de94478189095032b6615;p=spline3.git

diff --git a/src/Values.hs b/src/Values.hs
index bd7c4d6..b5dc15a 100644
--- a/src/Values.hs
+++ b/src/Values.hs
@@ -1,62 +1,53 @@
-{-# LANGUAGE TypeSynonymInstances #-}
-
-module Values
+{-# LANGUAGE FlexibleInstances #-}
+
+module Values (
+  Values,
+  Values2D,
+  Values3D,
+  dims,
+  empty3d,
+  idx,
+  zoom_shape
+  )
 where
 
 import Data.Array.Repa (
-  Array,
+  Array, U,
   Z(..),
   (:.)(..),
-  DIM1,
   DIM2,
   DIM3,
   extent,
-  fromList,
-  index,
-  reshape,
+  fromListUnboxed,
+  unsafeIndex,
   )
 
-import Data.Array.Repa.IO.Vector (readVectorFromTextFile)
 import System.FilePath ()
-import Test.QuickCheck (Arbitrary(..), Gen)
+import Test.QuickCheck (Arbitrary(..), Gen, choose, vectorOf)
+
+
+import ScaleFactor (ScaleFactor)
 
 
-type Values1D = Array DIM1 Double
-type Values2D = Array DIM2 Double
-type Values3D = Array DIM3 Double
+type Values sh = Array U sh Double
+type Values2D  = Values DIM2
+type Values3D  = Values DIM3
 
 
 instance Arbitrary Values3D where
     arbitrary = do
-      x_dim <- arbitrary :: Gen Int
-      y_dim <- arbitrary :: Gen Int
-      z_dim <- arbitrary :: Gen Int
-      one_d <- arbitrary :: Gen Values1D
+      -- I declare not to care about empty lists.
+      x_dim <- choose (1, 27)
+      y_dim <- choose (1, 27)
+      z_dim <- choose (1, 27)
+      elements <- vectorOf (x_dim * y_dim * z_dim) (arbitrary :: Gen Double)
       let new_shape = (Z :. x_dim :. y_dim :. z_dim)
-      let three_d = reshape new_shape one_d
+      let three_d = Data.Array.Repa.fromListUnboxed new_shape elements
       return three_d
 
 
-instance Arbitrary Values1D where
-    arbitrary = do
-      x <- arbitrary :: Gen [Double]
-      let shape = (Z :. (length x))
-      let one_d = Data.Array.Repa.fromList shape x
-      return one_d
-
-
-read_values_1d :: FilePath -> IO Values1D
-read_values_1d path = readVectorFromTextFile path
-
-
-read_values_3d :: DIM3 -> FilePath -> IO Values3D
-read_values_3d sh path = do
-  one_d <- read_values_1d path
-  return $ reshape sh one_d
-
-
 empty3d :: Values3D
-empty3d = Data.Array.Repa.fromList (Z :. 0 :. 0 :. 0) []
+empty3d = Data.Array.Repa.fromListUnboxed (Z :. 0 :. 0 :. 0) []
 
 
 dims :: Values3D -> (Int, Int, Int)
@@ -68,7 +59,17 @@ dims v3d =
 
 idx :: Values3D -> Int -> Int -> Int -> Double
 idx v3d i j k =
-    index v3d shape
+    unsafeIndex v3d shape
     where
       shape :: DIM3
       shape = (Z :. i :. j :. k)
+
+
+zoom_shape :: ScaleFactor -> DIM3 -> DIM3
+zoom_shape (sfx, sfy, sfz) sh =
+    let (Z :. x :. y :. z) = sh
+        x' = x * sfx
+        y' = y * sfy
+        z' = z * sfz
+    in
+      (Z :. x' :. y' :. z')