From 7d36dd68dcc4e3b245a119a948959b9f91f37752 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Thu, 7 Dec 2017 23:52:05 +0100
Subject: [PATCH] CS: Make orbit camera not change roll

---
 apps/opencs/view/render/cameracontroller.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/apps/opencs/view/render/cameracontroller.cpp b/apps/opencs/view/render/cameracontroller.cpp
index 7b802b0ef..cb1278805 100644
--- a/apps/opencs/view/render/cameracontroller.cpp
+++ b/apps/opencs/view/render/cameracontroller.cpp
@@ -673,6 +673,7 @@ namespace CSVRender
     {
         osg::Vec3d eye, center, up;
         getCamera()->getViewMatrixAsLookAt(eye, center, up);
+        up = osg::Vec3(0,0,1);
 
         osg::Quat rotation = osg::Quat(value, up);
         osg::Vec3d oldOffset = eye - mCenter;
@@ -685,6 +686,7 @@ namespace CSVRender
     {
         osg::Vec3d eye, center, up;
         getCamera()->getViewMatrixAsLookAt(eye, center, up);
+        up = osg::Vec3(0,0,1);
 
         osg::Vec3d forward = center - eye;
         osg::Quat rotation = osg::Quat(value, up ^ forward);