Define a constant for the World Up vector

apps/opencs/view/render/cameracontroller.cpp

@@ -13,6 +13,8 @@ namespace CSVRender
     Camera Controller
     */
 
+    const osg::Vec3d CameraController::WorldUp = osg::Vec3d(0, 0, 1);
+
     const osg::Vec3d CameraController::LocalUp = osg::Vec3d(0, 1, 0);
     const osg::Vec3d CameraController::LocalLeft = osg::Vec3d(1, 0, 0);
     const osg::Vec3d CameraController::LocalForward = osg::Vec3d(0, 0, 1);

apps/opencs/view/render/cameracontroller.hpp

@@ -19,6 +19,8 @@ namespace CSVRender
     {
         public:
 
+            static const osg::Vec3d WorldUp;
+
             static const osg::Vec3d LocalUp;
             static const osg::Vec3d LocalLeft;
             static const osg::Vec3d LocalForward;

apps/opencs/view/render/scenewidget.cpp

@@ -321,7 +321,7 @@ void SceneWidget::selectNavigationMode (const std::string& mode)
         mCurrentCamControl->setCamera(NULL);
         mCurrentCamControl = mFreeCamControl.get();
         mCurrentCamControl->setCamera(getCamera());
-        mFreeCamControl->fixUpAxis(osg::Vec3d(0,0,1));
+        mFreeCamControl->fixUpAxis(CameraController::WorldUp);
     }
     else if (mode=="free")
     {