Added AdjustSphereSegmentCallback to provide '<' and '>' key controls over the azim and elev range of the sphere segment
Added AdjustSphereSegmentCallback to provide '<' and '>' key controls over the azim and elev range of the sphere segment

openscenegraph/osg,jtorresfabra/osg,jtorresfabra/osg,marchelbling/osg,marchelbling/osg,scrawl/osg,openscenegraph/osg,jtorresfabra/osg,scrawl/osg,openscenegraph/osg,openscenegraph/osg,scrawl/osg,jtorresfabra/osg,scrawl/osg,marchelbling/osg,marchelbling/osg