Kernel::ConstructPointOn_2 Concept Reference

Definition

Refines:

AdaptableFunctor (with two arguments)

See also

CGAL::Line_2<Kernel>

CGAL::Ray_2<Kernel>

CGAL::Segment_2<Kernel>

Operations
A model of this concept must provide:
Kernel::Point_2	operator() (const Kernel::Line_2 &l, const Kernel::FT i)
	returns an arbitrary point on l. More...
Kernel::Point_2	operator() (const Kernel::Ray_2 &r, const Kernel::FT i)
	returns a point on r. More...
Kernel::Point_2	operator() (const Kernel::Segment_2 &s, int i)
	returns source or target of s: point(0) returns the source of s, point(1) returns the target of s. More...

Member Function Documentation

operator()() [1/3]

Kernel::Point_2 Kernel::ConstructPointOn_2::operator()	(	const Kernel::Line_2 &	l,
		const Kernel::FT	i
	)

returns an arbitrary point on l.

It holds point(i) == point(j), iff i==j. Furthermore, is directed from point(i) to point(j), for all i < j.

operator()() [2/3]

Kernel::Point_2 Kernel::ConstructPointOn_2::operator()	(	const Kernel::Ray_2 &	r,
		const Kernel::FT	i
	)

returns a point on r.

point(0) is the source, point(i), with i>0, is different from the source.

Precondition

i>= 0.

operator()() [3/3]

Kernel::Point_2 Kernel::ConstructPointOn_2::operator()	(	const Kernel::Segment_2 &	s,
		int	i
	)

returns source or target of s: point(0) returns the source of s, point(1) returns the target of s.

The parameter i is taken modulo 2, which gives easy access to the other end point.