public Cluster Create2DClusterAt(Point center)
{
var points = new[] { new Point(center.X - 1, center.Y, center.Z), new Point(center.X + 1, center.Y, center.Z), new Point(center.X, center.Y - 1, center.Z), new Point(center.X, center.Y + 1, center.Z) };
return new Cluster(points);
}
}