From: Michael Orlitzky <michael@orlitzky.com>
Date: Wed, 24 Aug 2011 16:40:43 +0000 (-0400)
Subject: Remove the x_coord, y_coord, and z_coord functions from Point.
X-Git-Tag: 0.0.1~222
X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=603d9155a29bfbc353b42a6c880edce224626a16;p=spline3.git

Remove the x_coord, y_coord, and z_coord functions from Point.
---

diff --git a/src/Cube.hs b/src/Cube.hs
index 2878eb0..6263d2e 100644
--- a/src/Cube.hs
+++ b/src/Cube.hs
@@ -116,13 +116,13 @@ instance ThreeDimensional Cube where
 
     -- | It's easy to tell if a point is within a cube; just make sure
     --   that it falls on the proper side of each of the cube's faces.
-    contains_point c p
-        | (x_coord p) < (xmin c) = False
-        | (x_coord p) > (xmax c) = False
-        | (y_coord p) < (ymin c) = False
-        | (y_coord p) > (ymax c) = False
-        | (z_coord p) < (zmin c) = False
-        | (z_coord p) > (zmax c) = False
+    contains_point c (x, y, z)
+        | x < (xmin c) = False
+        | x > (xmax c) = False
+        | y < (ymin c) = False
+        | y > (ymax c) = False
+        | z < (zmin c) = False
+        | z > (zmax c) = False
         | otherwise = True
 
 
diff --git a/src/Point.hs b/src/Point.hs
index a92041e..2b8d597 100644
--- a/src/Point.hs
+++ b/src/Point.hs
@@ -8,15 +8,6 @@ import Comparisons
 
 type Point = (Double, Double, Double)
 
-x_coord :: Point -> Double
-x_coord (x, _, _) = x
-
-y_coord :: Point -> Double
-y_coord (_, y, _) = y
-
-z_coord :: Point -> Double
-z_coord (_, _, z) = z
-
 instance Num Point where
     (x1,y1,z1) + (x2,y2,z2) = (x1+x2, y1+y2, z1+z2)
     (x1,y1,z1) - (x2,y2,z2) = (x1-x2, y1-y2, z1-z2)
@@ -33,15 +24,8 @@ scale (x, y, z) d = (x*d, y*d, z*d)
 
 -- | Returns the distance between p1 and p2.
 distance :: Point -> Point -> Double
-distance p1 p2 =
+distance (x1, y1, z1) (x2, y2, z2) =
     sqrt $ (x2 - x1)^(2::Int) + (y2 - y1)^(2::Int) + (z2 - z1)^(2::Int)
-    where
-      x1 = x_coord p1
-      x2 = x_coord p2
-      y1 = y_coord p1
-      y2 = y_coord p2
-      z1 = z_coord p1
-      z2 = z_coord p2
 
 
 -- | Returns 'True' if p1 is close to (within 'epsilon' of) p2,
diff --git a/src/Tetrahedron.hs b/src/Tetrahedron.hs
index eefbe11..73ed588 100644
--- a/src/Tetrahedron.hs
+++ b/src/Tetrahedron.hs
@@ -223,18 +223,10 @@ vol_matrix t = (4><4)
                 y1, y2, y3, y4,
                 z1, z2, z3, z4 ]
     where
-      x1 = x_coord (v0 t)
-      x2 = x_coord (v1 t)
-      x3 = x_coord (v2 t)
-      x4 = x_coord (v3 t)
-      y1 = y_coord (v0 t)
-      y2 = y_coord (v1 t)
-      y3 = y_coord (v2 t)
-      y4 = y_coord (v3 t)
-      z1 = z_coord (v0 t)
-      z2 = z_coord (v1 t)
-      z3 = z_coord (v2 t)
-      z4 = z_coord (v3 t)
+      (x1, y1, z1) = v0 t
+      (x2, y2, z2) = v1 t
+      (x3, y3, z3) = v2 t
+      (x4, y4, z4) = v3 t
 
 -- | Computed using the formula from Lai & Schumaker, Definition 15.4,
 --   page 436.