Added more comprehensive releaseGLObjects(State*=0) throughout Nodes,
Drawables,StateSet, and osgDB::Registry. Added cleanup_frame() from to osgProducer::OsgCamerGroup to help with proper clean of OpenGL objects before exit, and modified osgviewer, osghangglider, osgwindows examples to do the extra frame call to cleanup_frame() before exit.
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@@ -120,7 +120,7 @@ public:
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/** If State is non-zero, this function releases OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objexts
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* for all graphics contexts. */
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virtual void releaseGLObjects(osg::State* state=0) const;
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virtual void releaseGLObjects(osg::State* state=0) const;
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protected:
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