Ok i see, so you would append a custum reading thread to the osg database to avoid subclassing.
/adrian 2008/11/12 Robert Osfield <[EMAIL PROTECTED]> > Hi Adrian, > > Personally I'd write the code to retrieve the tiles as an OSG plugin > or using a Registry::ReadFileCallback. > > The pager now support multiple database reading threads to the latency > between request and when it's loaded needn't be long. This would > simplify your code significantly and would avoid the need for > subclassing of the DatabasePager. > > Robert. > > On Wed, Nov 12, 2008 at 4:06 PM, Adrian Egli OpenSceneGraph (3D) > <[EMAIL PROTECTED]> wrote: > > Hi all , > > > > One of our application is working with a derrived class of database > pager. > > Our class has just over written > > ::requestNodeFile(const std::string& inFileName,osg::Group* group, float > > priority, const osg::FrameStamp* framestamp,osg::ref_ptr<osg::Referenced> > > &databaseRequest) > > method. There we get a request form osgDB core (osgUtil::cull visitor) > and > > we generate a event to generate the right tile from a database. the event > > gets handled in a second thread, once he has finish > > generating the right tile, we insert the information into a list. once a > > requested tile is in a liste we can make use of the common database pager > > requestnodefile method. so we just call > > > DatabasePager::requestNodeFile(inFileName,group,priority,framestamp,databaseRequest); > > so it seams to work, but unfortunatelly there are > > in some cases missing requestnodefile calls, means the database pager > should > > still have such missing tiles, but i don't get right informed, or the > > database pager doesn't page in the tiles, may there is > > something wrong with the framestamp. or is there something implement to > give > > a maximum of time to page in a tile. ? after such a time slot there will > no > > longer paged in the requested tile. ? > > > > adrian > > > > -- > > ******************************************** > > Adrian Egli > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- ******************************************** Adrian Egli
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