Hi Srikanth,
The osgGA camera manipulators don't currently check the scroll wheel
at all. They are all open source so if you need this feature just
dive into the implementation and add them and then send me the changes
so we can get it merged with SVN.
Robert.
On Mon, May 5, 2008 at 11:46 PM, Srikanth Bemineni
<[EMAIL PROTECTED]> wrote:
> I am experimenting with the osgQTviewer.I am not able to zoom in when the
> mouse wheel is scrolled.I am using trackballmanipulator.I am not able to
> find a good documentation about camera manipulators.Even the Reference doc
> doesn't mention the explanation of manipulators.
>
> AdapterWidget::AdapterWidget( ViewerQT *source ,QWidget * parent, const
> char * name, const QGLWidget * shareWidget, WindowFlags f):
> #if USE_QT4
> QGLWidget(parent, shareWidget, f)
> #else
> QGLWidget(parent, name, shareWidget, f)
> #endif
> {
> m_source = source;
> resize( 800 ,600 );
> /* To Remove this */
> /*
> * // create the window to draw to.
> * */
> osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
> osg::GraphicsContext::Traits;
> traits->x = 200;
> traits->y = 200;
> traits->width = 800;
> traits->height = 600;
> traits->windowDecoration = true;
> traits->doubleBuffer = true;
> traits->sharedContext = 0;
>
> osg::ref_ptr<osg::GraphicsContext> gc =
> osg::GraphicsContext::createGraphicsContext(traits.get());
>
> _gw = new osgViewer::GraphicsWindowEmbedded(traits.get());
> #if USE_QT4
> setFocusPolicy(Qt::ClickFocus);
> #else
> setFocusPolicy(QWidget::ClickFocus);
> #endif
> }
> ..
> ... all the other event handling
> ...
>
>
>
> void AdapterWidget::mouseMoveEvent( QMouseEvent* event )
> {
> _gw->getEventQueue()->mouseMotion(event->x(), event->y());
> }
>
> void AdapterWidget::wheelEvent( QWheelEvent *event )
> {
> //m_source->wheelEvent( event );
> if( event->delta() > 0 )
> _gw->getEventQueue()->mouseScroll(osgGA::GUIEventAdapter::SCROLL_UP );
> else
> _gw->getEventQueue()->mouseScroll(osgGA::GUIEventAdapter::SCROLL_DOWN
> );
> }
>
> ViewerQT::
> ViewerQT(QWidget * parent, const char * name, const QGLWidget * shareWidget
> , WindowFlags f ):
> AdapterWidget( this , parent, name, shareWidget, f )
> {
>
> znear = 1.0f;
> zfar = 10000.0f;
> getCamera()->setViewport(new osg::Viewport(0,0,width(),height()));
> //getCamera()->setProjectionMatrixAsPerspective(30.0f,
> static_cast<double>(width())/static_cast<double>(height()), 1.0f, 10000.0f);
>
>
> getCamera()->setGraphicsContext(getGraphicsWindow());
> /* To Remove*/
> osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new
> osgGA::StateSetManipulator(getCamera()->getStateSet());
> addEventHandler(statesetManipulator.get());
> /*to remove end*/
>
> addEventHandler(new PickHandler());
>
> setThreadingModel(osgViewer::Viewer::SingleThreaded);
>
> connect(&_timer, SIGNAL(timeout()), this, SLOT(updateGL()));
> _timer.start(10);
> _manipulator = new osgGA::TrackballManipulator;
> setCameraManipulator(_manipulator);
> cout<<"Minimum distance "<<_manipulator->getMinimumDistance()<<endl;
> cout<<"Homepostion
> compute"<<_manipulator->getAutoComputeHomePosition()<<endl;
> //_manipulator->setAutoComputeHomePosition(false);
> _manipulator->setMinimumDistance(1000);
> osg::Vec3d eye;
> osg::Vec3d center;
> osg::Vec3d up;
> _manipulator->getHomePosition( eye , center , up );
> cout<<"x y z "<< eye.x()<<eye.y()<<eye.z()<<endl;
> cout<<"x y z "<< center.x()<<center.y()<<center.z()<<endl;
> cout<<"x y z "<< up.x()<<up.y()<<up.z()<<endl;
> }
> void
> ViewerQT::
> VwheelEvent( QWheelEvent *event )
> {
>
> cout<<event->delta()<<endl;
> if( event->delta() > 0 )
> {
> znear = znear + 120.0f;
> }
> else
> {
> if( (znear - 120) >= 1.0 )
> {
> znear = znear - 120;
> }
> }
>
> }
>
> void
> ViewerQT::
> paintGL()
> {
> osg::Vec3d eye;
> osg::Vec3d center;
> osg::Vec3d up;
> _manipulator->getHomePosition( eye , center , up );
> cout<<"eye x y z "<< eye.x()<<" "<<eye.y()<<" "<<eye.z()<<endl;
> cout<<"center x y z "<<center.x()<<" "<<center.y()<<"
> "<<center.z()<<endl;
> cout<<"up x y z "<< up.x()<<" "<<up.y()<<" "<<up.z()<<endl;
> frame();
> }
>
>
> and this is how I am creating the Viewer window.
> I tried to move the perspective view.
> I tried to translate the camera matrix.
> I tried to set the home positon
> but none of the above things seems to work in moving the camera or
> zooming.I am new to opengl and open scene graph any guide would be really
> helpful.
>
> Thank You
>
> --
> With Regards
> Srikanth Bemineni
> Geotrace Technologies
> 281-497-8440 extn 228
>
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
