+
+
+
+-- This is how we do a 'for' loop in Haskell.
+-- No, seriously.
+cubes :: Grid -> [[[Cube]]]
+cubes g
+ | fvs == [[[]]] = [[[]]]
+ | head fvs == [[]] = [[[]]]
+ | otherwise =
+ [[[ Cube (h g) i j k (make_values fvs i j k) | i <- [0..xsize]]
+ | j <- [0..ysize]]
+ | k <- [0..zsize]]
+ where
+ fvs = function_values g
+ zsize = (length fvs) - 1
+ ysize = (length $ head fvs) - 1
+ xsize = (length $ head $ head fvs) - 1