Definition

The concept Periodic_2Offset_2 describes a two-/dimensional integer vector with some specialized access functions and operations.

See also: Periodic_2TriangulationTraits_2; Periodic_2DelaunayTriangulationTraits_2

Related Functions
(Note that these are not member functions.)
istream &	operator>> (istream &is, Periodic_2Offset_2 &off)
	Inputs an offset from `is`.

ostream &	operator<< (ostream &os, Periodic_2Offset_2 &off) const
	Outputs an offset from `os`.

Operations
Periodic_2Offset_2	operator+ (const Periodic_2Offset_2 &o) const
	Return the vector sum of `this` and `o`.

Periodic_2Offset_2	operator- (const Periodic_2Offset_2 &o) const
	Return the vector difference of `this` and `o`.

Periodic_2Offset_2	operator- () const
	Return the negative vector of `this`.

void	operator+= (const Periodic_2Offset_2 &o) const
	Add `o` to `this` using vector addition.

void	operator-= (const Periodic_2Offset_2 &o) const
	Subtract `o` from `this` using vector subtraction.

bool	operator== (const Periodic_2Offset_2 &o) const
	Return `true` if `o` and `this` represent the same vector.

bool	operator!= (const Periodic_2Offset_2 &o) const
	Return `true` if `o` and `this` do not represent the same vector.

bool	operator< (const Periodic_2Offset_2 &o) const
	Compare `this` and `o` lexicographically.

Access Functions
int	operator[] (int i)
	Return the \( i\)-th entry of `this`. More...

int	x () const
	Return the \( x\)-entry of `this`.

int	y () const
	Return the \( y\)-entry of `this`.

bool	is_null () const
	Returns `true` if `this` is equal to (0,0).

bool	is_zero () const
	Returns `true` if `this` is equal to (0,0).

Member Function Documentation

int Periodic_2Offset_2::operator[] ( int i )

Return the \( i\)-th entry of this.