Hi -- There are a couple different strategies, depending on how your database is laid out. I've seen many OpenFlight databases arranged as a series of tiles to represent a large area of terrain. You might want to have OSG page in near tiles, leaving far tiles resident on disk until needed. To do this, create a top level Group Node, with PagedLOD child Nodes for each one of the tiles. Use the database metadata to determine the appropriate center and radius for each tile. Another strategy would be to convert ProxyNodes in a loaded OpenFlight database into PagedLOD Nodes, and I assume that's what Brian's code does. There might be other strategies as well; it's really limited by your imagination and application requirements. -Paul
_____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kiff Loh Sent: Friday, June 27, 2008 10:21 PM To: [email protected] Subject: [osg-users] Paging Openflight Hi, I read some very interesting posts by Robert and Brian Hill on paging an openflight database. Robert says, 'The OSG natively supports database paging, and its automatically set up in osgViewer::Viewer/CompositeViewer when your scene contains osg::PagedLOD nodes - it's PagedLOD nodes that provide the information about the what to page in. The OpenFlight loaders doesn't know about paging itself, the format itself doesn't support as far as I'm aware. If you wish to use it for paging then you'll need to take the database and convert to an OSG native format and insert PagedLOD nodes where appropriate.' How do I 'take the database and convert to an OSG native format and insert PagedLOD'? I actually managed to download ConvertPagedLOD.cpp from another post by Brian R Hill. Do I compile it in OSG environment, and then try to 'convert the osg::ProxyNodes to osg::PagedLODs'? How do I set the osg:: PagedLODs center and radius? Thanks for the help. Kiff _____ Enrich your blog with Windows Live Writer. Windows Live Writer <http://get.live.com/writer/overview>
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