Hi Amalric, The way PagedLOD is set up is that it allows you to specify children that are not external file references, but locally stored to that PagedLOD, typically one would just have one child like this which will act as a lowest level of detail fallback. PagedLOD itself will automatically make file requests on children that aren't loaded and are required for the current viewing distance, and then fallback to the next highest res child, and if you have one of this fallback children in place you'll never get any holes.
The VirtualPlanetBuilder builds databases that fit the above scheme, each tile on disk containing a Group of four PagedLOD, with each PagedLOD containing a low res child with geometry and texture stored, and filename set to "", and then an external file reference for the higher res version. Robert. On Thu, Jun 19, 2008 at 9:41 AM, amalric alexandre <[EMAIL PROTECTED]> wrote: > Hi all osg-users, > > I'm wondering how to do the best database paging. I use quadtree method to > produce my database and I want to make PagedLOD with only one geometry from > level of details "n" and 4 external childs wich level of details "n+1". > > But when I produce this kind of database I see empty hole because childs of > a pagedLOD aren't loaded at the same time. > > Is there a method to avoid this. > > Before this method we used to make a group with 4 pagedLOD, each pageLod had > one child as a geometry of level detail "n" and one child as an external > file of level of detail "n+1". But the problem is that if we have external > files of approximatively the same size let's say 1MB, our group size will > increase by 4 because we copy 4 geometries. I want to do a pagedLOD with the > same size as external files. > > Thank you, > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
