Hi Xiaodong,
Is just that you can't "throw" i.e. when you release the mouse whilst
moving the camera just stops rather continuing with the same motion?
Robert.
On Nov 22, 2007 11:45 AM, Wu Xiaodong <[EMAIL PROTECTED]> wrote:
> Hi. Robert.
>
> Thanks for ur respond, I have read the code osgAnimation. I used some
> confused word to describe my problem. ( :( bad English, my native laguage is
> Chinese ).
>
> What i want to know is that how the camera can go along its latest
> way(or path),
>
> For example, I drag the focus of camera ( trackball-manipulator ) from
> left to right on a window, then the camera should go around the trackball
> of the scene from a position to anothion. when I release the button, the
> camera can continue along its latest way( or path ) at a speed. when i drag
> from right to left, the camera go reversely and can go along with its new
> path.
>
> I failed to enable the camera continue along its latest way. when i
> release the button, the scene ceased, too.
>
> Thanks.
>
>
> xiaodong
>
>
>
>
>
> On Nov 22, 2007 5:42 PM, Robert Osfield <[EMAIL PROTECTED]> wrote:
> > Hi Xiaodong,
> >
> > The TrackballManipulator is just for user interaction with the camera
> > position, its does support throwing which is activated by the user
> > releasing a mouse button while still moving the mouse. It sounds like
> > this is not what you want though.
> >
> > To general rotate objects in the scene the way to do is to place a
> > Transform node of some type (i.e.
> > osg::MatrixTransform/PositionAttitudeTransform) and then attached an
> > osg::AnimationPathCallback to it, or to attach a
> > osgUtil::TransformCallback the later is deprecated though. With an
> > AnimationPath you can define any combination of scaling, rotation and
> > translation. Have a look at the osganimation example.
> >
> > Robert.
> >
> >
> >
> >
> > On Nov 22, 2007 9:34 AM, Wu Xiaodong <[EMAIL PROTECTED]> wrote:
> > >
> > > Hi, Everyone:
> > >
> > > I am a total begginer user of OSG for 3 days.
> > >
> > > How can i enable the auto-rotate effect on a TrackballManipulator?
> > >
> > > I have attached a osgViewer::viewer to a window on Win32.(
> windiow+MFC
> > > ) by following code.
> > >
> > > viewer = new osgViewer::Viewer;
> > > osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
> > > osg::GraphicsContext::Traits;
> > > traits->x = 0;
> > > traits->y = 0;
> > > traits->width = rc.Width();
> > > traits->height = rc.Height();
> > > .........
> > >
> /////////////////////////////////////////////////////////////////////////////////
> > > osg::ref_ptr<osgViewer::GraphicsWindowWin32::WindowData> wdata = new
> > > osgViewer::GraphicsWindowWin32::WindowData( GetSafeHwnd() );
> > > traits->inheritedWindowData = wdata.get();
> > > osg::ref_ptr<osg::GraphicsContext> gc =
> > > osg::GraphicsContext::createGraphicsContext( traits.get());
> > > if ( gc.valid() ) {
> > > viewer->getCamera()->setGraphicsContext( gc.get());
> > > viewer->getCamera()->setViewport(new osg::Viewport(0,0, traits->width,
> > > traits->height));
> > > }
> > > ............................................................
> > >
> > >
> ///////////////////////////////////////////////////////////////////////////////////////////////
> > > viewer->setSceneData( createGeode().get() );
> > > viewer->setCameraManipulator(new osgGA::TrackballManipulator);
> > > viewer->addEventHandler(new osgViewer::StatsHandler);
> > > viewer->realize();
> > >
> > > //========
> > > but I cannot enable the Node "viewer" to auto-rotate just as the
> > > demos in the tutorial on site of "www.openscenegraph.org"on the events
> of
> > > mouseButtonPress(x,y,1) or mouseButtonPress(x,y,3) and
> > > mouseButtonRelease(x,y,1) or mouseButtonRelease(x,y,3).
> > >
> > > what's the problem in the code? Thanks!
> > >
> > > xiaodong
> > >
> > >
> > >
> > >
> > >
> > >
> > > --
> > > xiaodong Wu.
> > >
> > > _______________________________________________
> > > 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
> >
>
>
>
> --
> 吴晓东
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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