Robert, Thank you! That works great!
I (of course) first tried a modification of that by doing the setHomePosition(...) on the TrackballManipulator before attaching it to the viewer, then doing the viewer->home() call... This did not work. Any idea why? Thanks again! Bob Gallaway -----Original Message----- From: Robert Osfield [mailto:[EMAIL PROTECTED] Sent: Friday, March 21, 2008 5:07 AM To: OpenSceneGraph Users Subject: Re: [osg-users] TrackballManipulator is not responding to commands... Hi Bob, I don't know C#, but on the C++ side you can do: viewer.getCameraManipulator()->setHomePosition(...); And then viewer.home(); Robert. On Thu, Mar 20, 2008 at 11:55 PM, Gallaway, Robert A. <[EMAIL PROTECTED]> wrote: > > > > I have issues with initialization of the osgTrackballManipulator. The > problem appears when using the TaoFramework (coding in C#) so that may > be a factor. Regardless of what initial conditions I specify for the > trackball, the scene starts out witht the eyepoint in the XY-plane > several hundred meters from the origin. Here is the initialization code: > > public void InitializeOSG() > { > timerRefresh.Enabled = false; > _timer = new Osg.Timer(); > _viewer = new Viewer(); > _gw = _viewer.setUpViewerAsEmbeddedInWindow(0, 0, Width, > Height); > > // Declare and allocate a trackball manipulator to control > the view > TrackballManipulator l_TrackballManipulator = new > TrackballManipulator(); > > // Use a quaternion to setup the trackball > l_TrackballManipulator.setCenter(new Osg.Vec3d(0.0, 0.0, 0.0)); > Osg.Quat initRotation = new Osg.Quat(); > initRotation.makeRotate( DegToRad(45.0), 0.0, 0.0, 1.0 ); // > Tried both degrees and radians here... no difference > > l_TrackballManipulator.setRotation( initRotation ); // > SEEMS TO DO NOTHING > l_TrackballManipulator.setDistance(1.0); // > SEEMS TO DO NOTHING > l_TrackballManipulator.setMinimumZoomScale(0.0); // Preclude > pushing the TO point near the target > > // Apply the trackball manipulator to the camera manipulator > _viewer.setCameraManipulator( l_TrackballManipulator); > > // Specify single-threaded viewing > _viewer.setThreadingModel(Viewer.ThreadingModel.SingleThreaded); > _viewer.setSceneData(new Osg.Group()); > _viewer.realize(); > timerRefresh.Enabled = true; > _viewer.frame(_timer.time_s()); //!< Draw one time to kick > out the old OpenGL buffer > > // DEBUG: Get trackball manipulators back to see how they > are really set... > Osg.Vec3d center = l_TrackballManipulator.getCenter(); > double distance = l_TrackballManipulator.getDistance(); > double zoomScale = l_TrackballManipulator.getMinimumZoomScale(); > } > > I would welcome any ideas about why this code does not establish the > initial view... > > Bob Gallaway > _______________________________________________ > 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
