Hi Sebastian, On 5/03/12 20:01 , Sebastian Messerschmidt wrote: > Now, in order to cache the nodes correctly I've put a reference to the node > in to a map > (std::map<std::string, osg::ref_ptr<Node>>). I need to use the ref_ptr to be > sure the node > is still valid. > It works well, up to the point where the DataBasePager removes expired > PagedLODs, as I > don't found any way to set a callback to the DataBasePager that tells me, > which node is > going to be removed.
If you only need to detect that nodes have been expired by the DatabasePager (and not necessarily the exact moment) you could use an observer_ptr in your map rather than a ref_ptr. But you would need to 'lock()' every access and run a map cleanup periodically to remove stale nodes. Still, depending on your needs it might be cleaner than to subclass DBP. Cheers, /ulrich _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
