osg::ref_ptr<osgViewer::Viewer> viewer=new osgViewer::Viewer();

	osg::ref_ptr<osg::Node> node= new osg::Node();

	node = osgDB::readNodeFile("E:\\study\\OpenSceneGraph_data\\cow.osg");

	viewer->setSceneData(node.get());

	viewer->realize();

	viewer->run();