public PointList(List <Point3D> points, Point3D position, Color color, string name, PointListType type = PointListType.NotLinked) : base(position, color, name)
 {
     SourcePoints = points;
     Type         = type;
 }
 public PointList(List <Point3D> points, PointListType type = PointListType.NotLinked)
 {
     SourcePoints = points;
     Type         = type;
 }