public void paintConvexHull() {
PNode pointSet = new PNode();
for (Vector2D point : points) {
final PNode node = PPath.createEllipse(point.getX() - 1, point.getY() - 1, 2, 2);
node.addAttribute("tooltip", point);
node.setPaint(Color.gray);
pointSet.addChild(node);
}
canvas.getLayer().addChild(pointSet);