Contains geometry relation and modification algorithms. More...

#include <qgsgeometryengine.h>

Inheritance diagram for QgsGeometryEngine:

Public Member Functions
	QgsGeometryEngine (const QgsAbstractGeometryV2 *geometry)

virtual	~QgsGeometryEngine ()

virtual double	area (QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	buffer (double distance, int segments, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	buffer (double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit, QString *errorMsg=nullptr) const =0

virtual bool	centroid (QgsPointV2 &pt, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	combine (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	combine (const QList< QgsAbstractGeometryV2 * > &, QString *errorMsg=nullptr) const =0

virtual bool	contains (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	convexHull (QString *errorMsg=nullptr) const =0

virtual bool	crosses (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	difference (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	disjoint (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual double	distance (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	envelope (QString *errorMsg=nullptr) const =0

virtual void	geometryChanged ()=0

virtual QgsAbstractGeometryV2 *	interpolate (double distance, QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	intersection (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	intersects (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	isEmpty (QString *errorMsg) const =0

virtual bool	isEqual (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	isValid (QString *errorMsg=nullptr) const =0

virtual double	length (QString *errorMsg=nullptr) const =0

virtual QgsAbstractGeometryV2 *	offsetCurve (double distance, int segments, int joinStyle, double mitreLimit, QString *errorMsg=nullptr) const =0

virtual bool	overlaps (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	pointOnSurface (QgsPointV2 &pt, QString *errorMsg=nullptr) const =0

virtual void	prepareGeometry ()=0

virtual QString	relate (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0
	Returns the Dimensional Extended 9 Intersection Model (DE-9IM) representation of the relationship between the geometries. More...

virtual bool	relatePattern (const QgsAbstractGeometryV2 &geom, const QString &pattern, QString *errorMsg=nullptr) const =0
	Tests whether two geometries are related by a specified Dimensional Extended 9 Intersection Model (DE-9IM) pattern. More...

virtual QgsAbstractGeometryV2 *	simplify (double tolerance, QString *errorMsg=nullptr) const =0

virtual int	splitGeometry (const QgsLineStringV2 &splitLine, QList< QgsAbstractGeometryV2 > &newGeometries, bool topological, QgsPointSequenceV2 &topologyTestPoints, QString errorMsg=nullptr) const

virtual QgsAbstractGeometryV2 *	symDifference (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	touches (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

virtual bool	within (const QgsAbstractGeometryV2 &geom, QString *errorMsg=nullptr) const =0

Protected Member Functions
	QgsGeometryEngine ()

Protected Attributes
const QgsAbstractGeometryV2 *	mGeometry

Detailed Description

Contains geometry relation and modification algorithms.

Note: added in QGIS 2.10; this API is not considered stable and may change for 2.12

Definition at line 32 of file qgsgeometryengine.h.

Constructor & Destructor Documentation

◆ QgsGeometryEngine() [1/2]

QgsGeometryEngine::QgsGeometryEngine ( const QgsAbstractGeometryV2 * geometry )

inline

Definition at line 35 of file qgsgeometryengine.h.

◆ ~QgsGeometryEngine()

virtual QgsGeometryEngine::~QgsGeometryEngine ( )

inlinevirtual

Definition at line 36 of file qgsgeometryengine.h.

◆ QgsGeometryEngine() [2/2]

QgsGeometryEngine::QgsGeometryEngine ( )

protected

Member Function Documentation

◆ area()

virtual double QgsGeometryEngine::area ( QString * errorMsg = nullptr ) const

pure virtual

Implemented in QgsGeos.

◆ buffer() [1/2]

virtual QgsAbstractGeometryV2* QgsGeometryEngine::buffer	(	double	distance,
		int	segments,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ buffer() [2/2]

virtual QgsAbstractGeometryV2* QgsGeometryEngine::buffer	(	double	distance,
		int	segments,
		int	endCapStyle,
		int	joinStyle,
		double	mitreLimit,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ centroid()

virtual bool QgsGeometryEngine::centroid	(	QgsPointV2 &	pt,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ combine() [1/2]

virtual QgsAbstractGeometryV2* QgsGeometryEngine::combine	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ combine() [2/2]

virtual QgsAbstractGeometryV2* QgsGeometryEngine::combine	(	const QList< QgsAbstractGeometryV2 * > &	,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

◆ contains()

virtual bool QgsGeometryEngine::contains	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ convexHull()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::convexHull ( QString * errorMsg = nullptr ) const

pure virtual

Implemented in QgsGeos.

◆ crosses()

virtual bool QgsGeometryEngine::crosses	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ difference()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::difference	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ disjoint()

virtual bool QgsGeometryEngine::disjoint	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ distance()

virtual double QgsGeometryEngine::distance	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ envelope()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::envelope ( QString * errorMsg = nullptr ) const

pure virtual

Implemented in QgsGeos.

◆ geometryChanged()

virtual void QgsGeometryEngine::geometryChanged ( )

pure virtual

Implemented in QgsGeos.

◆ interpolate()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::interpolate	(	double	distance,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ intersection()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::intersection	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ intersects()

virtual bool QgsGeometryEngine::intersects	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ isEmpty()

virtual bool QgsGeometryEngine::isEmpty ( QString * errorMsg ) const

pure virtual

Implemented in QgsGeos.

◆ isEqual()

virtual bool QgsGeometryEngine::isEqual	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ isValid()

virtual bool QgsGeometryEngine::isValid ( QString * errorMsg = nullptr ) const

pure virtual

Implemented in QgsGeos.

◆ length()

virtual double QgsGeometryEngine::length ( QString * errorMsg = nullptr ) const

pure virtual

Implemented in QgsGeos.

◆ offsetCurve()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::offsetCurve	(	double	distance,
		int	segments,
		int	joinStyle,
		double	mitreLimit,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ overlaps()

virtual bool QgsGeometryEngine::overlaps	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ pointOnSurface()

virtual bool QgsGeometryEngine::pointOnSurface	(	QgsPointV2 &	pt,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ prepareGeometry()

virtual void QgsGeometryEngine::prepareGeometry ( )

pure virtual

Implemented in QgsGeos.

◆ relate()

virtual QString QgsGeometryEngine::relate	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Returns the Dimensional Extended 9 Intersection Model (DE-9IM) representation of the relationship between the geometries.

Parameters

geom	geometry to relate to
errorMsg	destination storage for any error message

Returns: DE-9IM string for relationship, or an empty string if an error occurred

Note: added in QGIS 2.12

Implemented in QgsGeos.

◆ relatePattern()

virtual bool QgsGeometryEngine::relatePattern	(	const QgsAbstractGeometryV2 &	geom,
		const QString &	pattern,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Tests whether two geometries are related by a specified Dimensional Extended 9 Intersection Model (DE-9IM) pattern.

Parameters

geom	geometry to relate to
pattern	DE-9IM pattern for match
errorMsg	destination storage for any error message

Returns: true if geometry relationship matches with pattern

Note: added in QGIS 2.14

Implemented in QgsGeos.

◆ simplify()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::simplify	(	double	tolerance,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ splitGeometry()

virtual int QgsGeometryEngine::splitGeometry	(	const QgsLineStringV2 &	splitLine,
		QList< QgsAbstractGeometryV2 *> &	newGeometries,
		bool	topological,
		QgsPointSequenceV2 &	topologyTestPoints,
		QString *	errorMsg = `nullptr`
	)		const

inlinevirtual

Reimplemented in QgsGeos.

Definition at line 88 of file qgsgeometryengine.h.

◆ symDifference()

virtual QgsAbstractGeometryV2* QgsGeometryEngine::symDifference	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ touches()

virtual bool QgsGeometryEngine::touches	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

◆ within()

virtual bool QgsGeometryEngine::within	(	const QgsAbstractGeometryV2 &	geom,
		QString *	errorMsg = `nullptr`
	)		const

pure virtual

Implemented in QgsGeos.

Member Data Documentation

◆ mGeometry

const QgsAbstractGeometryV2* QgsGeometryEngine::mGeometry

protected

Definition at line 104 of file qgsgeometryengine.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/geometry/qgsgeometryengine.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ QgsGeometryEngine() [1/2]

◆ ~QgsGeometryEngine()

◆ QgsGeometryEngine() [2/2]

Member Function Documentation

◆ area()

◆ buffer() [1/2]

◆ buffer() [2/2]

◆ centroid()

◆ combine() [1/2]

◆ combine() [2/2]

◆ contains()

◆ convexHull()

◆ crosses()

◆ difference()

◆ disjoint()

◆ distance()

◆ envelope()

◆ geometryChanged()

◆ interpolate()

◆ intersection()

◆ intersects()

◆ isEmpty()

◆ isEqual()

◆ isValid()

◆ length()

◆ offsetCurve()

◆ overlaps()

◆ pointOnSurface()

◆ prepareGeometry()

◆ relate()

◆ relatePattern()

◆ simplify()

◆ splitGeometry()

◆ symDifference()

◆ touches()

◆ within()

Member Data Documentation

◆ mGeometry