protected SceneGraphModel tm;
public Xith3DPlugin3D(){
pluginName = new String("Xith 3D Viewer");
pluginManager = ((PluginManager) new Xith3DPluginManager());
mainBuiltin = (Syn3DPlugin)pluginManager.getPlugin(Xith3DSyn3DBuiltin.class);
tm = ((SceneGraphModel)new SceneGraphModelXith3D());