Hi Sophie, Are you simply looking to load databases in a background thread whilst the main thread and rendering threads get on with update, culling and rendering the scene?
The OSG has an database paging class call osgDB::DatabasePager that is built into the osgViewer::Viewer/CompositeViewer that will automatically load databases and merge them with the main scene graph during the update traversal. This is built around the osg::PagedLOD class, but you can also use the osg::ProxyNode. Robert. On 14 April 2015 at 08:57, Sophie Audonneau < sophie.audonne...@etu.univ-lorraine.fr> wrote: > Hi, > > I work on a project for witch I need to remove/add nodes while > OpenSceneGraph is rendering. > I created a rendering window with OpenScenegraph and then I would like to > be able to load/unload objects in it. > I make the calls for OSG frame() function inside a draw function and I use > a singleton to manage the creation of the viewer. That way I managed to > have a single viewer and then load my OpenSceneGraph objects inside that > same viewer. > It seems fine but the problem is that I have to set camera and viewer > parameters each time I call frame(). If I don't nothing is displayed, > except OSG font colour. > Ideally I would like to set the viewer parameters only when I load an OSG > object for the first time. > > Currently when I load an OSG object I use my singleton to find the viewer > and to add the loaded node to the root associated to my viewer. > instance()->find_or_create_viewer(); //creates a viewer if none have been > created yet > instance()->addChild(loadedNode); > viewer_ = instance()->viewer(); // return a pointer to the unique > osgViewer::Viewer > > In my draw function I have to do the following : > viewer_->setUpViewerAsEmbeddedInWindow(viewParams[0],viewParams[1],viewParams[2] > ,viewParams[3]); > viewer_->getCamera()->setProjectionMatrix( osg::Matrix(glMat_projection) ); > viewer_->getCamera()->setViewMatrix( osg::Matrix(glMat_modelview) ); > viewer_->frame(); > > I have read that for dynamical rendering there was something to do about > object's variance so I tried a few things but I didn't find how to solve my > problem. > > Thank you! > > Cheers, > Sophie > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=63377#63377 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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