3D Ray (CGAL_Ray_3)

Definition

#include <CGAL/Ray_3.h>

Creation

CGAL_Ray_3<R> r ( CGAL_Point_3<R> p, Point_3 q);
	introduces a ray r with source $p$ and passing through point $q$.
CGAL_Ray_3<R> r ( CGAL_Point_3<R> p, CGAL_Direction_3<R> d);
	introduces a ray r with source $p$ and with direction $d$.

Operations

bool	r == h	Test for equality: two rays are equal, iff they have the same source and the same direction.
bool	r != h	Test for inequality.
CGAL_Point_3<R>	r.source ()	returns the source of r
CGAL_Point_3<R>	r.point ( int i)	returns a point on r. point(0) is the source. point(i), with $i>0$, is different from the source. Precondition: $i\; >=0$.
CGAL_Direction_3<R>
	r.direction ()	returns the direction of r.
CGAL_Line_3<R>	r.supporting_line ()
		returns the line supporting r which has the same direction.
CGAL_Ray_3<R>	r.opposite ()	returns the ray with the same source and the opposite direction.
bool	r.is_degenerate ()	ray r is degenerate, if the source and the second defining point fall together (that is if the direction is degenerate).
bool	r.has_on ( CGAL_Point_3<R> p)
		A point is on r, iff it is equal to the source of r, or if it is in the interior of r.
CGAL_Ray_3<R>	r.transform ( CGAL_Aff_transformation_3<R> t)
		returns the ray obtained by applying $t$ on the source and on the direction of r.