Definition

The concept Periodic_3Offset_3 describes a three-dimensional integer vector with some specialized access functions and operations.

See Also: Periodic_3TriangulationTraits_3; Periodic_3DelaunayTriangulationTraits_3; Periodic_3RegularTriangulationTraits_3

Creation
	Periodic_3Offset_3 ()
	Default constructor.

	Periodic_3Offset_3 (int x, int y, int z)
	Constructs the offset (x,y,z).

Operations
Periodic_3Offset_3	operator+ (const Periodic_3Offset_3 &other) const
	Return the vector sum of `o` and `other`.

Periodic_3Offset_3	operator- (const Periodic_3Offset_3 &other) const
	Return the vector difference of `o` and `other`.

Periodic_3Offset_3	operator- () const
	Return the negative vector of `o`.

void	operator+= (const Periodic_3Offset_3 &other) const
	Add `other` to `o` using vector addition.

void	operator-= (const Periodic_3Offset_3 &other) const
	Subtract `other` from `o` using vector subtraction.

bool	operator== (const Periodic_3Offset_3 &other) const
	Return `true` if `other` and `o` represent the same vector.

bool	operator!= (const Periodic_3Offset_3 &other) const
	Return `true` if `other` and `o` do not represent the same vector.

bool	operator< (const Periodic_3Offset_3 &other) const
	Compare `o` and `other` lexicographically.

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

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

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

int	z ()
	Return the \( z\)-entry of `o`.

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

istream &	operator>> (istream &is, Periodic_3_offset_3 &off)
	Inputs an offset from `is`.

ostream &	operator<< (ostream &os, Periodic_3_offset_3 &off) const
	Outputs an offset from `os`.

Creation