X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FCube.hs;h=ad3d3c7567a343f57a5ecbcda85394b96500b06d;hb=190b6c22ab150e1877b0b94a33253832eb7764d2;hp=8d978f732ffeb8fe2acd7f04b46a5912ede43168;hpb=d8bb807e89fbb193b373be111217813d5a4222e9;p=spline3.git

diff --git a/src/Cube.hs b/src/Cube.hs
index 8d978f7..ad3d3c7 100644
--- a/src/Cube.hs
+++ b/src/Cube.hs
@@ -2,10 +2,10 @@ module Cube
 where
 
 import Cardinal
-import Face (Face(Face, v0, v1, v2, v3))
+import qualified Face (Face(Face, v0, v1, v2, v3))
 import FunctionValues
 import Point
-import Tetrahedron (Tetrahedron(Tetrahedron), fv)
+import Tetrahedron hiding (c)
 import ThreeDimensional
 
 data Cube = Cube { h :: Double,
@@ -26,7 +26,8 @@ instance Show Cube where
         " ymin: " ++ (show (ymin c)) ++ "\n" ++
         " ymax: " ++ (show (ymax c)) ++ "\n" ++
         " zmin: " ++ (show (zmin c)) ++ "\n" ++
-        " zmax: " ++ (show (zmax c)) ++ "\n"
+        " zmax: " ++ (show (zmax c)) ++ "\n" ++
+        " fv: " ++ (show (Cube.fv c)) ++ "\n"
         where
           subscript =
               (show (i c)) ++ "," ++ (show (j c)) ++ "," ++ (show (k c))
@@ -111,20 +112,20 @@ instance ThreeDimensional Cube where
 -- Face stuff.
 
 -- | The top (in the direction of z) face of the cube.
-top_face :: Cube -> Face
-top_face c = Face v0' v1' v2' v3'
+top_face :: Cube -> Face.Face
+top_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
-      v0' = (center c) + (delta, delta, delta)
-      v1' = (center c) + (delta, -delta, delta)
-      v2' = (center c) + (-delta, -delta, delta)
-      v3' = (center c) + (-delta, delta, delta)
+      v0' = (center c) + (delta, -delta, delta)
+      v1' = (center c) + (delta, delta, delta)
+      v2' = (center c) + (-delta, delta, delta)
+      v3' = (center c) + (-delta, -delta, delta)
 
 
 
 -- | The back (in the direction of x) face of the cube.
-back_face :: Cube -> Face
-back_face c = Face v0' v1' v2' v3'
+back_face :: Cube -> Face.Face
+back_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
       v0' = (center c) + (delta, delta, delta)
@@ -134,8 +135,8 @@ back_face c = Face v0' v1' v2' v3'
 
 
 -- The bottom face (in the direction of -z) of the cube.
-down_face :: Cube -> Face
-down_face c = Face v0' v1' v2' v3'
+down_face :: Cube -> Face.Face
+down_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
       v0' = (center c) + (delta, delta, -delta)
@@ -146,8 +147,8 @@ down_face c = Face v0' v1' v2' v3'
 
 
 -- | The front (in the direction of -x) face of the cube.
-front_face :: Cube -> Face
-front_face c = Face v0' v1' v2' v3'
+front_face :: Cube -> Face.Face
+front_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
       v0' = (center c) + (-delta, -delta, delta)
@@ -155,10 +156,9 @@ front_face c = Face v0' v1' v2' v3'
       v2' = (center c) + (-delta, delta, -delta)
       v3' = (center c) + (-delta, -delta, -delta)
 
-
 -- | The left (in the direction of -y) face of the cube.
-left_face :: Cube -> Face
-left_face c = Face v0' v1' v2' v3'
+left_face :: Cube -> Face.Face
+left_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
       v0' = (center c) + (-delta, -delta, delta)
@@ -168,8 +168,8 @@ left_face c = Face v0' v1' v2' v3'
 
 
 -- | The right (in the direction of y) face of the cube.
-right_face :: Cube -> Face
-right_face c = Face v0' v1' v2' v3'
+right_face :: Cube -> Face.Face
+right_face c = Face.Face v0' v1' v2' v3'
     where
       delta = (1/2)*(h c)
       v0' = (center c) + (-delta, delta, -delta)
@@ -178,84 +178,89 @@ right_face c = Face v0' v1' v2' v3'
       v3' = (center c) + (-delta, delta, delta)
 
 
+reorient :: Tetrahedron -> Tetrahedron
+reorient t = t
+--         | volume t > 0 = t
+--         | otherwise = t { v2 = (v3 t),
+--                           v3 = (v2 t) }
 
 tetrahedron0 :: Cube -> Tetrahedron
 tetrahedron0 c =
-    Tetrahedron (Cube.fv c) v0' v1' v2' v3'
+    reorient $ Tetrahedron (Cube.fv c) v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (front_face c)
-      v2' = v0 (front_face c)
-      v3' = v1 (front_face c)
+      v2' = Face.v0 (front_face c)
+      v3' = Face.v1 (front_face c)
 
 tetrahedron1 :: Cube -> Tetrahedron
 tetrahedron1 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (front_face c)
-      v2' = v1 (front_face c)
-      v3' = v2 (front_face c)
+      v2' = Face.v1 (front_face c)
+      v3' = Face.v2 (front_face c)
       fv' = rotate (Cube.fv c) ccwx
 
 tetrahedron2 :: Cube -> Tetrahedron
 tetrahedron2 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (front_face c)
-      v2' = v2 (front_face c)
-      v3' = v3 (front_face c)
+      v2' = Face.v2 (front_face c)
+      v3' = Face.v3 (front_face c)
       fv' = rotate (Cube.fv c) (ccwx . ccwx)
 
 tetrahedron3 :: Cube -> Tetrahedron
 tetrahedron3 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (front_face c)
-      v2' = v3 (front_face c)
-      v3' = v1 (front_face c)
+      v2' = Face.v3 (front_face c)
+      v3' = Face.v0 (front_face c)
       fv' = rotate (Cube.fv c) cwx
 
 tetrahedron4 :: Cube -> Tetrahedron
 tetrahedron4 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (top_face c)
-      v2' = v0 (front_face c)
-      v3' = v1 (front_face c)
+      v2' = Face.v0 (top_face c)
+      v3' = Face.v1 (top_face c)
       fv' = rotate (Cube.fv c) cwy
 
 tetrahedron5 :: Cube -> Tetrahedron
 tetrahedron5 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (top_face c)
-      v2' = v1 (top_face c)
-      v3' = v2 (top_face c)
+      v2' = Face.v1 (top_face c)
+      v3' = Face.v2 (top_face c)
       fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) ccwx
 
 tetrahedron6 :: Cube -> Tetrahedron
 tetrahedron6 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (top_face c)
-      v2' = v2 (top_face c)
-      v3' = v3 (top_face c)
+      v2' = Face.v2 (top_face c)
+      v3' = Face.v3 (top_face c)
       fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) (ccwx . ccwx)
 
 tetrahedron7 :: Cube -> Tetrahedron
 tetrahedron7 c =
-    Tetrahedron fv' v0' v1' v2' v3'
+    reorient $ Tetrahedron fv' v0' v1' v2' v3'
     where
       v0' = center c
       v1' = center (top_face c)
-      v2' = v3 (top_face c)
-      v3' = v1 (top_face c)
+      v2' = Face.v3 (top_face c)
+      v3' = Face.v0 (top_face c)
       fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) cwx
 
 tetrahedrons :: Cube -> [Tetrahedron]