osgFX::BumpMapping* bm = new osgFX::BumpMapping();
bm->addChikd(geode); //geode是一个Box
osg::TexTure2D* texd = new osg::Texture2D(osgDB::readImageFile("Images\\whitemetal_diffuse.jpg"));
osg::TexTure2D* texn = new osg::Texture2D(osgDB::readImageFile("Images\\whitemetal_normal.jpg"));