Constructors

void Line (const Point& pos = origin, const Point& dir = origin)

Default constructor

Creates a Line, setting position to pos, and direction to dir. If this function is called with no arguments, it creates a Line at the origin with no direction. Point p(2, 1, 2); Point d(-3, 3, 3.5); Line L0(p, d); Line L1 = p.get_line(d); Fig. 104.

void Line (const Line& l)

Copy constructor

Creates a Line, making it a copy of l.