public void addViewpoint(int index,String name){
  ViewpointStore vps=viewpointNode.getViewpoint(name);
  viewpointList.add(index,vps);
}

public void addViewpoint ( int index , String name ) { ViewpointStore vps = viewpointNode . getViewpoint ( name ) ; viewpointList . add ( index , vps ) ; }
add a viewpoint to the list
