import Data.Maybe (fromJust)
import Test.HUnit
-import Test.QuickCheck
import Assertions
import Comparisons
import Tetrahedron
-instance Arbitrary Grid where
- arbitrary = do
- (Positive h') <- arbitrary :: Gen (Positive Double)
- fvs <- arbitrary :: Gen [[[Double]]]
- return (make_grid h' fvs)
-
-
-- | Check the value of c0030 for tetrahedron0 belonging to the
-- cube centered on (1,1,1) with a grid constructed from the
-- trilinear values. See example one in the paper.
c0 = fromJust $ cube_at g 1 1 1
t0 = tetrahedron0 c0
p = polynomial t0
+
+
+-- | Make sure we can reproduce a 9x9x9 trilinear from the 3x3x3 one.
+test_trilinearx2_reproduced_t0 :: Assertion
+test_trilinearx2_reproduced_t0 =
+ assertTrue "trilinearx2 is reproduced correctly" $
+ and [p (i', j', k') ~= value_at trilinearx2 i j k
+ | i <- [0..8],
+ j <- [0..8],
+ k <- [0..8],
+ let i' = (fromIntegral i) * 0.5,
+ let j' = (fromIntegral j) * 0.5,
+ let k' = (fromIntegral k) * 0.5]
+ where
+ g = make_grid 1 trilinear
+ c0 = fromJust $ cube_at g 1 1 1
+ t0 = tetrahedron0 c0
+ p = polynomial t0