If you need to rotate your entire scene you can add a single transform to the root node and do the rotation. Then can treat that transform as the new root node.
> On Aug 2, 2016, at 10:27, Antoine Rennuit <[email protected]> wrote: > > Hi all, > > > My problem is solved my I flip my FrameBuffer vertically (in Qt), which I > should not be doing. > > > So anyone has an idea of what can flip my OSG view vertically? > > > Thanks, > > Antoine. > > > From: osg-users <[email protected]> on behalf of > Antoine Rennuit <[email protected]> > Sent: 02 August 2016 18:37 > To: [email protected] > Subject: Re: [osg-users] Left handed scene > > Hi all, > > > Going a bit forward with my left handedness problem... > > > My viewport actually appears upside down vertically: the HUD coordinate > system on the left is up when it should be down and the text is also written > upside (see joined picture). It behaves as if the viewport had its y origin > at the bottom of the viewport (and not at the top as usual). > > > Any idea? > > > Kind regards, > > > Antoine. > > > From: osg-users <[email protected]> on behalf of > Antoine Rennuit <[email protected]> > Sent: 02 August 2016 14:36 > To: [email protected] > Subject: [osg-users] Left handed scene > > Hi all, > > > I have a QtWidget app which I am converting to QtQuick. My app works well > with QtWidget but after transitioning to QtQuick I have observed that the > whole scene is now left handed: not only the geometry is left handed (the z > axis is down when it should be up - check joined file) but also the > TrackballManipulator behavior (e.g. when I pan up with the mouse the scene > goes down, and it's the same opposite reaction for rotate). > > > I do not understand where this is coming from. I was able to easily put the > geometry back right handed using a scale -1 on Z but I should not have to do > that and this does not solve the TrackballManipulator behavior. > > > I have used https://bitbucket.org/leon_manukyan/qtquick2osgitem as a starting > point and my code does the following: > > > I have a RendererImpl class, created by an OsgItem and which is responsible > for maintaining the osgViewer::Viewer and the osgViewer::GraphicsWindow, here > is its init method: > > > void RendererImpl::init() > { > m_sceneRoot = new osg::Group(); > > m_viewer = new osgViewer::Viewer; > m_viewer->setThreadingModel(osgViewer::ViewerBase::SingleThreaded); > m_viewer->setSceneData(m_sceneRoot); > m_viewer->setCameraManipulator(new osgGA::TrackballManipulator); > m_viewer->getCameraManipulator()->setHomePosition(osg::Vec3d(4.0, -4.0, > 2.0), osg::Vec3d(0.0, 0.0, 1.0), osg::Vec3d(0.0, 0.0, 1.0)); > m_viewer->home(); > > m_sceneRoot->addChild(setupLight()); > m_sceneRoot->addChild(setupGrid(6.0f, 2.0f)); > > m_window = new FrameBufferWindow(this); > updateSize(); > > osg::Camera* camera = m_viewer->getCamera(); > camera->setGraphicsContext( m_window.get() ); > > camera->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) ); > } > > And its update method on window size change: > > > void RendererImpl::updateSize() > { > m_window->getEventQueue()->windowResize(0, 0, osgItem().width(), > osgItem().height() ); > m_window->resized(0, 0, osgItem().width(), osgItem().height()); > > osg::Camera& camera = *m_viewer->getCamera(); > const osg::GraphicsContext::Traits& t = *m_window->getTraits(); > camera.setViewport( 0, 0, t.width, t.height ); > double aspectRatio = t.height ? (double)t.width / (double)t.height : 1.0; > camera.setProjectionMatrixAsPerspective(30.0f, aspectRatio, 1.0f, > 10000.0f ); > } > > And I have an item which streams the events to the window, e.g.: > > void OsgItem::mouseMoveEvent(QMouseEvent *event) > { > m_renderer->m_window->getEventQueue()->mouseMotion(event->x(), > event->y()); > > update(); > } > > Does anyone have an idea of what is wrong in my code? I have looked for days > and I am stuck! > > > Thanks, > > > Antoine. > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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