From 5d8daabe05fdfeecd06da9f6303bb3788846facc Mon Sep 17 00:00:00 2001
From: Andrew Brown <brownan@gmail.com>
Date: Fri, 4 Nov 2011 18:34:08 -0400
Subject: [PATCH] re-named variables for increased accuracy

---
 overviewer_core/quadtree.py | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/overviewer_core/quadtree.py b/overviewer_core/quadtree.py
index c0d511a..11c221c 100644
--- a/overviewer_core/quadtree.py
+++ b/overviewer_core/quadtree.py
@@ -617,23 +617,25 @@ class Tile(object):
         depth = len(path)
 
         # Radius of the world in chunk cols/rows
+        # (Diameter in X is 2**depth, divided by 2 for a radius, multiplied by
+        # 2 for 2 chunks per tile. Similarly for Y)
         xradius = 2**depth
         yradius = 2*2**depth
 
-        x = -xradius
-        y = -yradius
+        col = -xradius
+        row = -yradius
         xsize = xradius
         ysize = yradius
 
         for p in path:
             if p in (1,3):
-                x += xsize
+                col += xsize
             if p in (2,3):
-                y += ysize
+                row += ysize
             xsize //= 2
             ysize //= 2
 
-        return cls(x, y, path)
+        return cls(col, row, path)
 
     @classmethod
     def compute_path(cls, col, row, depth):