void ColladaSerializer::ColladaExporter::ColladaScene::write() {
	if (scene_opened) {
		closeVisualScene();
		closeLibrary();

		COLLADASW::Scene scene (mSW, COLLADASW::URI ("#" + scene_id));
		scene.add();		
	}
}
 //---------------------------------------------------------------
 void DocumentExporter::exportScene()
 {
     COLLADASW::Scene scene ( &mStreamWriter, COLLADASW::URI ( COLLADASW::Utils::EMPTY_STRING, SCENE_ID ) );        scene.add();
 }