osg::PagedLOD example

int main()
{
    osg::ref_ptr<osgViewer::Viewer> viewer1 = new osgViewer::Viewer;
    osg::ref_ptr<osg::PagedLOD> pageLdc1 = new osg::PagedLOD;

    pageLdc1->setFileName(, "D:\\参考手册\\BIM\\osg\\library.OSGB");
    pageLdc1->setRange(, , );

    viewer1->setSceneData(pageLdc1);
    viewer1->setUpViewInWindow(, , , , );

    return viewer1->run();
}