From fc7dde00828d98afaf6ee8e3c42ec2b9b20d5863 Mon Sep 17 00:00:00 2001
From: Erik Ziegler <erik.ziegler@ulg.ac.be>
Date: Thu, 17 Mar 2016 15:30:14 +0100
Subject: [PATCH] Fix NaN FPS

---
 .../components/viewer/viewportOverlay/viewportOverlay.js      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js b/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
index 48bb05c0f..f001d52e1 100644
--- a/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
+++ b/Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.js
@@ -159,6 +159,10 @@ Template.viewportOverlay.helpers({
     },
     frameRate: function() {
         var frameTime = getInstance.call(this, 'frameTime');
+        if (!frameTime) {
+            return;
+        }
+        
         var frameRate = 1000 / frameTime;
         return frameRate.toFixed(1);
     },