public void DrawPointsOnly(Graphics g)
{
using (Brush brush = new SolidBrush(Color.FromArgb(64, 0, 0, 0)))
{
foreach (var p in points)
{
g.FillEllipse(brush, new RectangleF(p.Position.X - 5, p.Position.Y - 5, 10, 10));
g.DrawEllipse(Pens.LightGray, new RectangleF(p.Position.X - 5, p.Position.Y - 5, 10, 10));
}
}
}