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CGAL 4.4 - 2D and 3D Linear Geometry Kernel
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Kernel::ConstructPointOn_2 Concept Reference

Definition

Operations

A model of this concept must provide:

Kernel::Point_2 operator() (const Kernel::Line_2 &l, int i)
 returns an arbitrary point on l. More...
 
Kernel::Point_2 operator() (const Kernel::Ray_2 &r, int 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

Kernel::Point_2 Kernel::ConstructPointOn_2::operator() ( const Kernel::Line_2 l,
int  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.

Kernel::Point_2 Kernel::ConstructPointOn_2::operator() ( const Kernel::Ray_2 r,
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.
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.