From 3076e6b2032d0acbd44966a9428fdc6de1bbcf3b Mon Sep 17 00:00:00 2001
From: Stan Seibert <stan@mtrr.org>
Date: Fri, 13 Jan 2012 11:47:35 -0500
Subject: Add md5() hash method to chroma.geometry.Mesh

---
 chroma/geometry.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/chroma/geometry.py b/chroma/geometry.py
index 08f57d1..1d2175c 100644
--- a/chroma/geometry.py
+++ b/chroma/geometry.py
@@ -77,6 +77,13 @@ class Mesh(object):
     def __add__(self, other):
         return Mesh(np.concatenate((self.vertices, other.vertices)), np.concatenate((self.triangles, other.triangles + len(self.vertices))))
 
+    def md5(self):
+        '''Return the MD5 hash of the vertices and triangles in this mesh as a 
+        hexidecimal string.'''
+        checksum = md5(self.vertices)
+        checksum.update(self.triangles)
+        return checksum.hexdigest()
+
 def memoize_method_with_dictionary_arg(func):
     def lookup(*args):
         # based on function by Michele Simionato
-- 
cgit