public Line() { first = new Point_u(); second = new Point_u(); }
public Line(Point_u _first, Point_u _second) { this.first = _first; this.second = _second; }
public Line() { first = new Point_u(); second = new Point_u(); }
public Line(Point_u _first, Point_u _second) { this.first = _first; this.second = _second; }