rem: osgLog().setLogLevel((LogLevel) 0);
context: int main(int argc, char **argv){    // OSG init    osgInit(argc,argv);    // GLUT init    int winid = setupGLUT(&argc, argv);    // the connection between GLUT and OpenSG    GLUTWindowPtr gwin= GLUTWindow::create();    gwin->setId(winid);    gwin->init();    // set log level to lowest unless specified otherwise by env variable    osgLog().setLogLevel((LogLevel) 0);        // create the scene    NodePtr scene = Node::create();    GroupPtr root = Group::create();    beginEditCP(scene, Node::CoreFieldMask);    scene->setCore(root);    endEditCP(scene, Node::CoreFieldMask);    if(scene != NullFC){        beginEditCP(scene);        scene->addChild(makeVolume("00_data64x64x64.dat"));        scene->addChild(createClipObjects());        endEditCP(scene);    }    // create the SimpleSceneManager helper    mgr = new SimpleSceneManager;    // tell the manager what to manage    mgr->setWindow   (gwin );    mgr->setRoot     (scene);    mgr->setHighlight(scene);    // show the whole scene    mgr->showAll();    Pnt3f from = mgr->getNavigator()->getFrom();    from[2] = 3 * from[2];    mgr->getNavigator()->setFrom(from);        // GLUT main loop    glutMainLoop();    return 0;}