Hello I'm using a osgGA::TrackballManipulator for my viewer. I have a osg::Group which holds all the scene objects, which can be removed and added during run. When I use the TrackballManipulator I see a problem with the zooming effect - if I added a large terrain I can zoom in but when I come closer it slows and eventually stops. I found the problem - at the beginning of the run there are no scene objects so the manipulator uses a default bounding sphere (in TrackballManipulator::setNode()). When later the objects change, the bounding sphere is not updated and therefor the zoom calculations are wrong. Any way to automatically use a correct bounding sphere in the manipulator? Roni
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