// Set up the QVTK window
viewer.reset (new pcl::visualization::PCLVisualizer ("viewer", false));
// viewer->addCoordinateSystem (1000.0);
//连接qvtk
ui->qvtkWidget->SetRenderWindow (viewer->getRenderWindow ()); //交互器必须在widget使能之前,
viewer->setupInteractor (ui->qvtkWidget->GetInteractor (), ui->qvtkWidget->GetRenderWindow ());
ui->qvtkWidget->update ();
addOrientationMarkerWidgetAxesToview(viewer->getRenderWindow()->GetInteractor(), 0.0, 0.0, 0.2, 0.2);