Hi Robert -- I see that in osgViewer/Viewer.cpp, in the ViewerQuerySupport class, you keep a regular C++ pointer to an osg::Drawable::Extensions object. That derives from Referenced, so I'm wondering if your pointer should actually be an osg::ref_ptr<> instead of a regular C++ pointer? Thanks. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> 303 859 9466
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