From 42b0f0f4d438ea24cd8909e75d56310fac850ce4 Mon Sep 17 00:00:00 2001
From: dellaert <dellaert@cc.gatech.edu>
Date: Mon, 25 May 2015 22:02:54 -0700
Subject: [PATCH] We need identity

---
 gtsam/geometry/Cyclic.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtsam/geometry/Cyclic.h b/gtsam/geometry/Cyclic.h
index 88a04ab2d..15d8154b8 100644
--- a/gtsam/geometry/Cyclic.h
+++ b/gtsam/geometry/Cyclic.h
@@ -34,6 +34,8 @@ public:
   /// Default constructor yields identity
   Cyclic():i_(0) {
   }
+  static Cyclic identity() { return Cyclic();}
+
   /// Cast to size_t
   operator size_t() const {
     return i_;