1 files changed, 27 insertions, 23 deletions

diff --git a/color.py b/color.py
index a38c28b..058abb4 100644
--- a/color.py
+++ b/color.py
@@ -4,41 +4,45 @@ import colorsys
 import math
 
 class Vector(object):
-    """N-dimensional vector class."""
-    def __init__(self, *components):
+    __slots__ = ('x', 'y', 'z')
+
+    """3-dimensional vector class."""
+    def __init__(self, x, y, z):
         """Create a vector from its components."""
-        self.components = components
+        self.x = x
+        self.y = y
+        self.z = z
 
     def __add__(self, other):
         """Add two vectors."""
-        return self.__class__(
-            *map(lambda (x, y): x + y, zip(self.components, other.components))
-        )
+        return self.__class__(self.x + other.x, self.y + other.y, self.z + other.z)
 
     def __sub__(self, other):
         """Subtract two vectors."""
-        return self.__class__(
-            *map(lambda (x, y): x - y, zip(self.components, other.components))
-        )
+        return self.__class__(self.x - other.x, self.y - other.y, self.z - other.z)
 
-    def __mul__(self, other):
+    def __mul__(self, scalar):
         """Multiply a vector by a constant."""
-        return self.__class__(*map(lambda x: x * other, self.components))
+        return self.__class__(self.x * scalar, self.y * scalar, self.z * scalar)
 
-    def __rmul__(self, other):
+    def __rmul__(self, scalar):
         """Multiply a constant by a vector."""
-        return self * other
+        return self * scalar
 
     def __abs__(self):
         """Return the 2-norm of the vector."""
-        return math.sqrt(sum(map(lambda x: x * x, self.components)))
+        return math.sqrt(self.x * self.x + self.y * self.y + self.z * self.z)
 
     def __truediv__(self, scalar):
         """Return self * 1 / scalar."""
         return self * (1 / scalar)
 
     def __eq__(self, other):
-        return self.components == other.components
+        return self.x == other.x and self.y == other.y and self.z == other.z
+
+    @property
+    def components(self):
+        return (self.x, self.y, self.z)
 
 
 class HSV(Vector):
@@ -49,19 +53,19 @@ class HSV(Vector):
 
     def to_RGB(self):
         """Convert to an RGB vector."""
-        return RGB(*colorsys.hsv_to_rgb(*self.components))
+        return RGB(*colorsys.hsv_to_rgb(self.x, self.y, self.z))
 
     def h(self):
         """Return hue."""
-        return self.components[0]
+        return self.x
 
     def s(self):
         """Return saturation."""
-        return self.components[1]
+        return self.y
 
     def v(self):
         """Return value."""
-        return self.components[2]
+        return self.z
 
 
 class RGB(Vector):
@@ -72,19 +76,19 @@ class RGB(Vector):
 
     def to_HSV(self):
         """Convert to HSV vector."""
-        return HSV(*colorsys.rgb_to_hsv(*self.components))
+        return HSV(*colorsys.rgb_to_hsv(self.x, self.y, self.z))
 
     def r(self):
         """Return red value."""
-        return self.components[0]
+        return self.x
 
     def g(self):
         """Return green value."""
-        return self.components[1]
+        return self.y
 
     def b(self):
         """Return blue value."""
-        return self.components[2]
+        return self.z
 
 red = RGB(1, 0, 0)
 green = RGB(0, 1, 0)