public PointMatrix(TypedArrayList <Point3> points)
     : base(3, points.Count())
 {
     this.points = points;
     for (int i = 0; i < points.Count(); i++)
     {
         SetColumn(i, points.Get(i).AsArray());
     }
 }
 public Point3 Get(int index)
 {
     return(points.Get(index));
 }