From c4fe563395b2cd471163fc876112535d5983babc Mon Sep 17 00:00:00 2001
From: Will Boyd <wbinventor@gmail.com>
Date: Sun, 9 Apr 2017 22:26:09 -0400
Subject: [PATCH] Added clone method to Geometry class

---
 openmc/geometry.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/openmc/geometry.py b/openmc/geometry.py
index ce7d47d9e2..424a7053e5 100644
--- a/openmc/geometry.py
+++ b/openmc/geometry.py
@@ -1,4 +1,5 @@
 from collections import OrderedDict, Iterable
+from copy import deepcopy
 from xml.etree import ElementTree as ET
 
 from six import string_types
@@ -497,3 +498,11 @@ class Geometry(object):
 
         # Recursively traverse the CSG tree to count all cell instances
         self.root_universe._determine_paths()
+
+    def clone(self):
+        """Create a copy of this geometry with new unique IDs for all of its
+        enclosed materials, surfaces, cells, universes and lattices."""
+
+        clone = deepcopy(self)
+        clone.root_universe = deepcopy(self.root_universe)
+        return clone