# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1444483441 -7200
# Node ID 7a5a1508ef30f51099b49857cce06fed3f9badc7
# Parent  e0fe30d7b8b13f2108857d313baa3dae2a1235fd
Removed a superfluous function, made naming and result changes for clarity.

diff -r e0fe30d7b8b1 -r 7a5a1508ef30 optimiser.py
--- a/optimiser.py	Sat Oct 10 15:16:51 2015 +0200
+++ b/optimiser.py	Sat Oct 10 15:24:01 2015 +0200
@@ -25,7 +25,6 @@
 import EXIF
 import PIL.Image
 import itertools
-import math
 import sys
 
 corners = [
@@ -41,11 +40,6 @@
 def clip(v):
     return int(within(v, 0, 255))
 
-def distance(rgb1, rgb2):
-    r1, g1, b1 = rgb1
-    r2, g2, b2 = rgb2
-    return math.sqrt(pow(r1 - r2, 2) + pow(g1 - g2, 2) + pow(b1 - b2, 2))
-
 def restore(srgb):
     r, g, b = srgb
     return int(r * 255.0), int(g * 255.0), int(b * 255.0)
@@ -70,9 +64,9 @@
     # Get the colour with components scaled from 0 to 1, plus the inverted
     # component values.
 
-    rgb = scale(rgb)
-    rgbi = invert(rgb)
-    pairs = zip(rgbi, rgb)
+    srgb = scale(rgb)
+    rgbi = invert(srgb)
+    pairs = zip(rgbi, srgb)
 
     # For each corner of the colour cube (primary and secondary colours plus
     # black and white), calculate the corner value's contribution to the
@@ -124,7 +118,7 @@
         out[0] += v * rgb[0]
         out[1] += v * rgb[1]
         out[2] += v * rgb[2]
-    return out
+    return tuple(map(int, out))
 
 def pattern(rgb, chosen=None):
 
@@ -199,9 +193,9 @@
             else:
                 c[value] += f
 
-    c = [(n/width, value) for value, n in c.items()]
-    c.sort(reverse=True)
-    return c
+    d = [(n/width, value) for value, n in c.items()]
+    d.sort(reverse=True)
+    return d
 
 def get_combinations(c, n):