if (parent != null) {
Group group = (Group) parent;
Model hullModel = group.getGroupData().getHullModel();
if (hullModel != null && hullModel.isCacheMatching(cacheMarker)) {
ConvexHull hull = (ConvexHull) hullModel.getObj();
hull.addNode(n);
hull.setModel(hullModel);
} else if (hullModel != null) {
//Its not the first time the hull exist
ConvexHullModel model = (ConvexHullModel) hullModel;
model.setScale(1f);