From d22f10d60ee3c4f75458cfbd8345e93fe3093018 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Sat, 4 Mar 2017 13:54:25 -0600
Subject: [PATCH] Automatically determine paths when root_universe is assigned.

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

diff --git a/openmc/geometry.py b/openmc/geometry.py
index 77f047e6e..d9a844896 100644
--- a/openmc/geometry.py
+++ b/openmc/geometry.py
@@ -43,6 +43,7 @@ class Geometry(object):
     def root_universe(self, root_universe):
         check_type('root universe', root_universe, openmc.Universe)
         self._root_universe = root_universe
+        self.determine_paths()
 
     def add_volume_information(self, volume_calc):
         """Add volume information from a stochastic volume calculation.