void initViewer(pcl::visualization::PCLVisualizer &viewer) { viewer.setBackgroundColor(0, 0, 0); viewer.addCoordinateSystem(1.0, "reference"); viewer.initCameraParameters(); viewer.setRepresentationToPointsForAllActors(); viewer.setCameraPosition(0, 0, -1, 0, 0, 0, 0, -1, 0); viewer.registerKeyboardCallback(keyboardCallback); }