Hi Maxim, On Mon, Dec 14, 2009 at 11:09 AM, Maxim Gammer <[email protected]> wrote: > I've got a question about osgDB::DatabasePager... > > 1. When I began using osg::PagedLOD, I came across many exaples of using > osgDB::DatabasePager in conjunction with osg::PagedLOD. What it's used for?
The PagedLOD class is the scene graph node that provides the information about which children can be seen at what distances, and what the names are of the external nodes. PagedLOD doesn't implement any actual loading, it doesn't know anything at all about file systems or loaders, it just stored data, handles traversals and makes requests for loading of tiles, other than that it's just a passive node. > 2. Why use osgDB::DatabasePager if osg::PagedLOD alone works fine? What > difference does it make? The DatabasePager is the bit the does the work, PagedLOD makes requests via the CullVisitor, and it goes off an serves these requests, be them on local disk, remote on http or cached in a local file cache. As far as end users are concerned all you normally have to worry about it creating the paged databases containing the PagedLOD, once correctly created you just load these in the viewer and it'll do the rest (using it's own DatabasePager). Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
