#include <CGAL/Bbox_2.h>

Definition

An object b of the class Bbox_2 is a bounding box in the two-dimensional Euclidean plane \( \E^2\).

This class is not templated.

Is model of: Hashable

See also: CGAL::Bbox_3

Examples: Kernel_23/MyConstruct_bbox_2.h.

Related Functions
(Note that these are not member functions.)
template<class InputIterator >
Bbox_2	bbox_2 (InputIterator begin, InputIterator past_end)
	returns the bounding box of the objects in the range `[first,past_end[`.

template<class InputIterator , class Traits >
Bbox_2	bbox_2 (InputIterator begin, InputIterator past_end, const Traits &traits)
	returns the bounding box of the objects in the range `[first,past_end[`.

Creation
	Bbox_2 ()
	introduces an empty bounding box with lower left corner point at \( (\infty, \infty) \) and with upper right corner point at \( (-\infty, -\infty) \), \( \infty \) being `std::numeric_limits<double>::infinity()`.

	Bbox_2 (double x_min, double y_min, double x_max, double y_max)
	introduces a bounding box `b` with lower left corner at `(xmin, ymin)` and with upper right corner at `(xmax, ymax)`.

Operations
bool	operator== (const Bbox_2 &c) const
	Test for equality.

bool	operator!= (const Bbox_2 &q) const
	Test for inequality.

int	dimension () const
	Returns 2.

double	xmin () const

double	ymin () const

double	xmax () const

double	ymax () const

double	min (int i) const
	Returns `xmin()` if `i==0` or `ymin()` if `i==1`.

double	max (int i) const
	Returns `xmax()` if `i==0` or `ymax()` if `i==1`.

Bbox_2	operator+ (const Bbox_2 &c) const
	returns a bounding box of `b` and `c`.

Bbox_2 &	operator+= (const Bbox_2 &c)
	updates `b` to be the bounding box of `b` and `c` and returns itself.

void	dilate (int dist)
	dilates the bounding box by a specified number of ULP.

void	scale (double factor)
	scales the bounding box by `factor`, while keeping its center fixed.

bool	do_overlap (const Bbox_2 &bb1, const Bbox_2 &bb2)
	returns `true` iff `bb1` and `bb2` overlap, i.e., iff their intersection is non-empty.

Member Function Documentation

◆ max()

double CGAL::Bbox_2::max ( int i ) const

Returns xmax() if i==0 or ymax() if i==1.

Precondition: i==0 or i==1

◆ min()

double CGAL::Bbox_2::min ( int i ) const

Returns xmin() if i==0 or ymin() if i==1.

Precondition: i==0 or i==1

◆ scale()

void CGAL::Bbox_2::scale ( double factor )

scales the bounding box by factor, while keeping its center fixed.

Precondition: factor > 0

Friends And Related Function Documentation

◆ bbox_2() [1/2]

template<class InputIterator >

Bbox_2 bbox_2	(	InputIterator	begin,
		InputIterator	past_end
	)

Each object in the range must have a member function BBox_2 bbox() returning its bounding box.

◆ bbox_2() [2/2]

template<class InputIterator , class Traits >

Bbox_2 bbox_2	(	InputIterator	begin,
		InputIterator	past_end,
		const Traits &	traits
	)

Traits must provide a functor Traits::Construct_bbox_2 having an operator returning the bounding box of each object in the range. Traits must also have a member function Traits::Construct_bbox_2 construct_bbox_2_object() const.