Represents a single 2D line segment, consisting of a 2D start and end vertex only. More...

#include <qgslinesegment.h>

Public Member Functions
	QgsLineSegment2D (const QgsPointXY &start, const QgsPointXY &end)
	Constructor for a QgsLineSegment2D from the specified start point to the end point.

	QgsLineSegment2D (double x1, double y1, double x2, double y2)
	Constructor for a QgsLineSegment2D from the point (x1, y2) to (x2, y2).

QgsPointXY	end () const
	Returns the segment's end point.

double	endX () const
	Returns the segment's end x-coordinate.

double	endY () const
	Returns the segment's end y-coordinate.

double	length () const
	Returns the length of the segment.

double	lengthSquared () const
	Returns the squared length of the segment.

bool	operator!= (const QgsLineSegment2D &other) const
	Inequality operator.

bool	operator== (const QgsLineSegment2D &other) const
	Equality operator.

int	pointLeftOfLine (const QgsPointXY &point) const
	Tests if a point is to the left of the line segment.

void	reverse ()
	Reverses the line segment, so that the start and end points are flipped.

void	setEnd (const QgsPointXY &end)
	Sets the segment's end point.

void	setEndX (double x)
	Sets the segment's end x coordinate.

void	setEndY (double y)
	Sets the segment's end y coordinate.

void	setStart (const QgsPointXY &start)
	Sets the segment's start point.

void	setStartX (double x)
	Sets the segment's start x coordinate.

void	setStartY (double y)
	Sets the segment's start y coordinate.

QgsPointXY	start () const
	Returns the segment's start point.

double	startX () const
	Returns the segment's start x-coordinate.

double	startY () const
	Returns the segment's start y-coordinate.

Detailed Description

Represents a single 2D line segment, consisting of a 2D start and end vertex only.

Since: QGIS 3.2

Definition at line 31 of file qgslinesegment.h.

Constructor & Destructor Documentation

◆ QgsLineSegment2D() [1/2]

QgsLineSegment2D::QgsLineSegment2D	(	const QgsPointXY &	start,
		const QgsPointXY &	end
	)

inline

Constructor for a QgsLineSegment2D from the specified start point to the end point.

Definition at line 40 of file qgslinesegment.h.

◆ QgsLineSegment2D() [2/2]

QgsLineSegment2D::QgsLineSegment2D	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)

inline

Constructor for a QgsLineSegment2D from the point (x1, y2) to (x2, y2).

Definition at line 49 of file qgslinesegment.h.

Member Function Documentation

◆ end()

QgsPointXY QgsLineSegment2D::end ( ) const

inline

Returns the segment's end point.

See also: start(); endX(); endY()

Definition at line 129 of file qgslinesegment.h.

◆ endX()

double QgsLineSegment2D::endX ( ) const

inline

Returns the segment's end x-coordinate.

See also: end(); endY()

Definition at line 97 of file qgslinesegment.h.

◆ endY()

double QgsLineSegment2D::endY ( ) const

inline

Returns the segment's end y-coordinate.

See also: end(); endX()

Definition at line 107 of file qgslinesegment.h.

◆ length()

double QgsLineSegment2D::length ( ) const

inline

Returns the length of the segment.

See also: lengthSquared()

Definition at line 58 of file qgslinesegment.h.

◆ lengthSquared()

double QgsLineSegment2D::lengthSquared ( ) const

inline

Returns the squared length of the segment.

See also: length()

Definition at line 67 of file qgslinesegment.h.

◆ operator!=()

bool QgsLineSegment2D::operator!= ( const QgsLineSegment2D & other ) const

inline

Inequality operator.

Definition at line 230 of file qgslinesegment.h.

◆ operator==()

bool QgsLineSegment2D::operator== ( const QgsLineSegment2D & other ) const

inline

Equality operator.

Definition at line 224 of file qgslinesegment.h.

◆ pointLeftOfLine()

int QgsLineSegment2D::pointLeftOfLine ( const QgsPointXY & point ) const

Tests if a point is to the left of the line segment.

Returns -1 if the point falls to the left of the line, or +1 if the point is to the right.

If the return value is 0, then the test was unsuccessful (e.g. due to testing a point exactly on the line, or exactly in line with the segment) and the result is undefined.

See also: QgsGeometryUtils::leftOfLine()

Definition at line 21 of file qgslinesegment.cpp.

◆ reverse()

void QgsLineSegment2D::reverse ( )

inline

Reverses the line segment, so that the start and end points are flipped.

Definition at line 216 of file qgslinesegment.h.

◆ setEnd()

void QgsLineSegment2D::setEnd ( const QgsPointXY & end )

inline

Sets the segment's end point.

See also: setEndX(); setEndY(); setStart()

Definition at line 195 of file qgslinesegment.h.

◆ setEndX()

void QgsLineSegment2D::setEndX ( double x )

inline

Sets the segment's end x coordinate.

See also: setStartX(); setEnd(); setEndY()

Definition at line 162 of file qgslinesegment.h.

◆ setEndY()

void QgsLineSegment2D::setEndY ( double y )

inline

Sets the segment's end y coordinate.

See also: setStartY(); setEnd(); setEndX()

Definition at line 173 of file qgslinesegment.h.

◆ setStart()

void QgsLineSegment2D::setStart ( const QgsPointXY & start )

inline

Sets the segment's start point.

See also: setStartX(); setStartY(); setEnd()

Definition at line 184 of file qgslinesegment.h.

◆ setStartX()

void QgsLineSegment2D::setStartX ( double x )

inline

Sets the segment's start x coordinate.

See also: setEndX(); setStart(); setStartY()

Definition at line 140 of file qgslinesegment.h.

◆ setStartY()

void QgsLineSegment2D::setStartY ( double y )

inline

Sets the segment's start y coordinate.

See also: setEndY(); setStart(); setStartX()

Definition at line 151 of file qgslinesegment.h.

◆ start()

QgsPointXY QgsLineSegment2D::start ( ) const

inline

Returns the segment's start point.

See also: end(); startX(); startY()

Definition at line 118 of file qgslinesegment.h.

◆ startX()

double QgsLineSegment2D::startX ( ) const

inline

Returns the segment's start x-coordinate.

See also: start(); startY()

Definition at line 77 of file qgslinesegment.h.

◆ startY()

double QgsLineSegment2D::startY ( ) const

inline

Returns the segment's start y-coordinate.

See also: start(); startX()

Definition at line 87 of file qgslinesegment.h.

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

/home/fischer/src/qgis-3.38/src/core/geometry/qgslinesegment.h
/home/fischer/src/qgis-3.38/src/core/geometry/qgslinesegment.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QgsLineSegment2D() [1/2]

◆ QgsLineSegment2D() [2/2]

Member Function Documentation

◆ end()

◆ endX()

◆ endY()

◆ length()

◆ lengthSquared()

◆ operator!=()

◆ operator==()

◆ pointLeftOfLine()

◆ reverse()

◆ setEnd()

◆ setEndX()

◆ setEndY()

◆ setStart()

◆ setStartX()

◆ setStartY()

◆ start()

◆ startX()

◆ startY()