From b86148411ba04167d847130553de4f84092a2302 Mon Sep 17 00:00:00 2001
From: cc9cii <cc9c@iinet.net.au>
Date: Wed, 12 Nov 2014 14:02:08 +1100
Subject: [PATCH] Fix for issue #2051.  Not perfect (can get into a lock in
 some situations) but usable.

---
 apps/opencs/view/render/navigation1st.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/apps/opencs/view/render/navigation1st.cpp b/apps/opencs/view/render/navigation1st.cpp
index 91f88634a..5d9a03468 100644
--- a/apps/opencs/view/render/navigation1st.cpp
+++ b/apps/opencs/view/render/navigation1st.cpp
@@ -44,10 +44,11 @@ bool CSVRender::Navigation1st::mouseMoved (const QPoint& delta, int mode)
             float deltaPitch = getFactor (true) * delta.y();
             Ogre::Radian newPitch = oldPitch + Ogre::Degree (deltaPitch);
 
-            Ogre::Radian limit (Ogre::Math::PI/2-0.5);
-
-            if ((deltaPitch>0 && newPitch<limit) || (deltaPitch<0 && newPitch>-limit))
+            if ((deltaPitch>0 && newPitch<Ogre::Radian(Ogre::Math::PI-0.5)) ||
+                (deltaPitch<0 && newPitch>Ogre::Radian(0.5)))
+            {
                 mCamera->pitch (Ogre::Degree (deltaPitch));
+            }
         }
 
         return true;