geos::operation::intersection::Rectangle Class Reference

Clipping rectangle. More...

#include <Rectangle.h>

Public Types
enum	Position {   Inside = 1 , Outside = 2 , Left = 4 , Top = 8 ,   Right = 16 , Bottom = 32 , TopLeft = Top | Left , TopRight = Top | Right ,   BottomLeft = Bottom | Left , BottomRight = Bottom | Right }
	Position with respect to a clipping rectangle.

Public Member Functions
	Rectangle (double x1, double y1, double x2, double y2)
	Construct a clipping rectangle.
double	xmin () const
double	ymin () const
double	xmax () const
double	ymax () const
std::unique_ptr< geom::Polygon >	toPolygon (const geom::GeometryFactory &f) const
std::unique_ptr< geom::LinearRing >	toLinearRing (const geom::GeometryFactory &f) const
Position	position (double x, double y) const
	Establish position of coordinate with respect to a Rectangle.

Static Public Member Functions
static bool	onEdge (Position pos)
	Test if the given position is on a Rectangle edge.
static bool	onSameEdge (Position pos1, Position pos2)
	Test if the given positions are on the same Rectangle edge.
static Position	nextEdge (Position pos)
	Next edge in clock-wise direction.

Detailed Description

Clipping rectangle.

A clipping rectangle defines the boundaries of the rectangle by defining the limiting x- and y-coordinates. The clipping rectangle must be non-empty. In addition, methods are provided for specifying the location of a given coordinate with respect to the clipping rectangle similarly to the Cohen-Sutherland clipping algorithm.

Constructor & Destructor Documentation

Rectangle()

geos::operation::intersection::Rectangle::Rectangle	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)

Construct a clipping rectangle.

Parameters

x1	x-coordinate of the left edge
y1	y-coordinate of the bottom edge
x2	x-coordinate of the right edge
y2	y-coordinate of the right edge

Exceptions

IllegalArgumentException

if the rectangle is empty

Member Function Documentation

nextEdge()

static Position geos::operation::intersection::Rectangle::nextEdge ( Position  pos )

inlinestatic

Next edge in clock-wise direction.

Parameters

pos

Position

Returns

next Position in clock-wise direction

onEdge()

static bool geos::operation::intersection::Rectangle::onEdge ( Position  pos )

inlinestatic

Test if the given position is on a Rectangle edge.

Parameters

pos	Rectangle::Position

Returns

true, if the position is on an edge

onSameEdge()

static bool geos::operation::intersection::Rectangle::onSameEdge ( Position  pos1, Position  pos2  )

inlinestatic

Test if the given positions are on the same Rectangle edge.

Parameters

pos1	Position of first coordinate
pos2	Position of second coordinate

Returns

true, if the positions are on the same edge

position()

Position geos::operation::intersection::Rectangle::position ( double  x, double  y  ) const

inline

Establish position of coordinate with respect to a Rectangle.

Parameters

x	x-coordinate
y	y-coordinate

Returns

Position of the coordinate

toPolygon()

std::unique_ptr< geom::Polygon > geos::operation::intersection::Rectangle::toPolygon

(

const geom::GeometryFactory &

f

)

const

Returns

the rectangle as a polygon geometry

Note

Ownership transferred to caller

xmax()

double geos::operation::intersection::Rectangle::xmax ( ) const

inline

Returns

the maximum x-coordinate of the rectangle

xmin()

double geos::operation::intersection::Rectangle::xmin ( ) const

inline

Returns

the minimum x-coordinate of the rectangle

ymax()

double geos::operation::intersection::Rectangle::ymax ( ) const

inline

Returns

the maximum y-coordinate of the rectangle

ymin()

double geos::operation::intersection::Rectangle::ymin ( ) const

inline

Returns

the minimum y-coordinate of the rectangle

---

The documentation for this class was generated from the following file:

• operation/intersection/Rectangle.h