X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FTests%2FGrid.hs;h=92ba20efbce2aa1c9f7bb843ec06806cb3e5d631;hb=ac0e94e82605a5fd1e3ee724cd597f48614689e4;hp=b565f0d819e29212aec3f9d94202a148670d76d0;hpb=bbf98604132c0d8907273c5c80fa000e7ec670a6;p=spline3.git

diff --git a/src/Tests/Grid.hs b/src/Tests/Grid.hs
index b565f0d..92ba20e 100644
--- a/src/Tests/Grid.hs
+++ b/src/Tests/Grid.hs
@@ -10,7 +10,9 @@ import Cube hiding (i, j, k)
 import Examples
 import FunctionValues (value_at)
 import Grid
+import Point (Point)
 import Tetrahedron
+import ThreeDimensional
 
 
 -- | Check the value of c0030 for tetrahedron0 belonging to the
@@ -352,3 +354,26 @@ test_trilinear9x9x9_reproduced =
       g = make_grid 1 trilinear
       c0 = fromJust $ cube_at g 1 1 1
 
+
+-- | The point 'p' in this test lies on the boundary of tetrahedra 12 and 15.
+--   However, the 'contains_point' test fails due to some numerical innacuracy.
+--   This bug should have been fixed by setting a positive tolerance level.
+--
+--   Example from before the fix:
+--
+--   > b0 (tetrahedron12 c) p
+--   -2.168404344971019e-18
+--   > b0 (tetrahedron15 c) p
+--   -3.4694469519536365e-18
+--
+test_tetrahedra_collision_sensitivity :: Assertion
+test_tetrahedra_collision_sensitivity =
+  assertTrue "tetrahedron collision tests aren't too sensitive" $
+             contains_point t12 p &&
+             contains_point t15 p
+  where
+    g = make_grid 1 trilinear
+    c = cube_at g 0 17 1
+    p = (0, 16.75, 0.5) :: Point
+    t12 = tetrahedron12 c
+    t15 = tetrahedron15 c