QgsPoint Class Reference

Point geometry type, with support for z-dimension and m-values. More...

#include <qgspoint.h>

Inheritance diagram for QgsPoint:

Public Member Functions
	QgsPoint (const QgsPointXY &p)
	Construct a QgsPoint from a QgsPointXY object.
	QgsPoint (double x=std::numeric_limits< double >::quiet_NaN(), double y=std::numeric_limits< double >::quiet_NaN(), double z=std::numeric_limits< double >::quiet_NaN(), double m=std::numeric_limits< double >::quiet_NaN(), Qgis::WkbType wkbType=Qgis::WkbType::Unknown)
	Construct a point with the provided initial coordinate values.
	QgsPoint (Qgis::WkbType wkbType, double x=std::numeric_limits< double >::quiet_NaN(), double y=std::numeric_limits< double >::quiet_NaN(), double z=std::numeric_limits< double >::quiet_NaN(), double m=std::numeric_limits< double >::quiet_NaN())
	Create a new point with the given wkbtype and values.
	QgsPoint (QPointF p)
	Construct a QgsPoint from a QPointF.
bool	addMValue (double mValue=0) override
	Adds a measure to the geometry, initialized to a preset value.
bool	addZValue (double zValue=0) override
	Adds a z-dimension to the geometry, initialized to a preset value.
void	adjacentVertices (QgsVertexId vertex, QgsVertexId &previousVertex, QgsVertexId &nextVertex) const override
	Returns the vertices adjacent to a specified vertex within a geometry.
QDomElement	asGml2 (QDomDocument &doc, int precision=17, const QString &ns="gml", QgsAbstractGeometry::AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const override
	Returns a GML2 representation of the geometry.
QDomElement	asGml3 (QDomDocument &doc, int precision=17, const QString &ns="gml", QgsAbstractGeometry::AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const override
	Returns a GML3 representation of the geometry.
json	asJsonObject (int precision=17) const override
	Returns a json object representation of the geometry.
QString	asKml (int precision=17) const override
	Returns a KML representation of the geometry.
QPainterPath	asQPainterPath () const override
	Returns the geometry represented as a QPainterPath.
QByteArray	asWkb (QgsAbstractGeometry::WkbFlags=QgsAbstractGeometry::WkbFlags()) const override
	Returns a WKB representation of the geometry.
QString	asWkt (int precision=17) const override
	Returns a WKT representation of the geometry.
double	azimuth (const QgsPoint &other) const
	Calculates Cartesian azimuth between this point and other one (clockwise in degree, starting from north)
QgsAbstractGeometry *	boundary () const override
	Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the geometry).
QgsBox3D	boundingBox3D () const override
	Returns the 3D bounding box for the geometry.
bool	boundingBoxIntersects (const QgsBox3D &box3d) const override
	Returns true if the bounding box of this geometry intersects with a box3d.
bool	boundingBoxIntersects (const QgsRectangle &rectangle) const override
	Returns true if the bounding box of this geometry intersects with a rectangle.
void	clear () override
	Clears the geometry, ie reset it to a null geometry.
QgsPoint *	clone () const override
	Clones the geometry by performing a deep copy.
double	closestSegment (const QgsPoint &pt, QgsPoint &segmentPt, QgsVertexId &vertexAfter, int *leftOf=nullptr, double epsilon=4 *std::numeric_limits< double >::epsilon()) const override
	Searches for the closest segment of the geometry to a given point.
bool	convertTo (Qgis::WkbType type) override
	Converts the geometry to a specified type.
QgsCoordinateSequence	coordinateSequence () const override
	Retrieves the sequence of geometries, rings and nodes.
QgsPoint *	createEmptyWithSameType () const override
	Creates a new geometry with the same class and same WKB type as the original and transfers ownership.
bool	deleteVertex (QgsVertexId position) override
	Deletes a vertex within the geometry.
int	dimension () const override
	Returns the inherent dimension of the geometry.
double	distance (const QgsPoint &other) const
	Returns the Cartesian 2D distance between this point and another point.
double	distance (double x, double y) const
	Returns the Cartesian 2D distance between this point and a specified x, y coordinate.
double	distance3D (const QgsPoint &other) const
	Returns the Cartesian 3D distance between this point and another point.
double	distance3D (double x, double y, double z) const
	Returns the Cartesian 3D distance between this point and a specified x, y, z coordinate.
double	distanceSquared (const QgsPoint &other) const
	Returns the Cartesian 2D squared distance between this point another point.
double	distanceSquared (double x, double y) const
	Returns the Cartesian 2D squared distance between this point a specified x, y coordinate.
double	distanceSquared3D (const QgsPoint &other) const
	Returns the Cartesian 3D squared distance between this point and another point.
double	distanceSquared3D (double x, double y, double z) const
	Returns the Cartesian 3D squared distance between this point and a specified x, y, z coordinate.
void	draw (QPainter &p) const override
	Draws the geometry using the specified QPainter.
bool	dropMValue () override
	Drops any measure values which exist in the geometry.
bool	dropZValue () override
	Drops any z-dimensions which exist in the geometry.
void	filterVertices (const std::function< bool(const QgsPoint &) > &filter) override
	Filters the vertices from the geometry in place, removing any which do not return true for the filter function check.
bool	fromWkb (QgsConstWkbPtr &wkb) override
	Sets the geometry from a WKB string.
bool	fromWkt (const QString &wkt) override
	Sets the geometry from a WKT string.
bool	fuzzyDistanceEqual (const QgsAbstractGeometry &other, double epsilon=1e-8) const override
	Performs fuzzy distance comparison between this geometry and other using an epsilon.
bool	fuzzyEqual (const QgsAbstractGeometry &other, double epsilon=1e-8) const override
	Performs fuzzy comparison between this geometry and other using an epsilon.
QString	geometryType () const override
	Returns a unique string representing the geometry type.
double	inclination (const QgsPoint &other) const
	Calculates Cartesian inclination between this point and other one (starting from zenith = 0 to nadir = 180.
bool	insertVertex (QgsVertexId position, const QgsPoint &vertex) override
	Inserts a vertex into the geometry.
bool	isEmpty () const override
	Returns true if the geometry is empty.
bool	isValid (QString &error, Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const override
	Checks validity of the geometry, and returns true if the geometry is valid.
double	m () const
	Returns the point's m value.
bool	moveVertex (QgsVertexId position, const QgsPoint &newPos) override
	Moves a vertex within the geometry.
int	nCoordinates () const override
	Returns the number of nodes contained in the geometry.
bool	nextVertex (QgsVertexId &id, QgsPoint &vertex) const override
	Returns next vertex id and coordinates.
void	normalize () final
	Reorganizes the geometry into a normalized form (or "canonical" form).
bool	operator!= (const QgsAbstractGeometry &other) const override
QgsPoint	operator+ (QgsVector v) const
	Adds a vector to this point.
QgsPoint &	operator+= (QgsVector v)
	Adds a vector to this point in place.
QgsVector	operator- (const QgsPoint &p) const
	Calculates the vector obtained by subtracting a point from this point.
QgsPoint	operator- (QgsVector v) const
	Subtracts a vector from this point.
QgsPoint &	operator-= (QgsVector v)
	Subtracts a vector from this point in place.
bool	operator== (const QgsAbstractGeometry &other) const override
int	partCount () const override
	Returns count of parts contained in the geometry.
QgsPoint	project (double distance, double azimuth, double inclination=90.0) const
	Returns a new point which corresponds to this point projected by a specified distance with specified angles (azimuth and inclination), using Cartesian mathematics.
bool	removeDuplicateNodes (double epsilon=4 *std::numeric_limits< double >::epsilon(), bool useZValues=false) override
	Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerate geometry.
int	ringCount (int=0) const override
	Returns the number of rings of which this geometry is built.
double &	rm ()
	Returns a reference to the m value of this point.
double &	rx ()
	Returns a reference to the x-coordinate of this point.
double &	ry ()
	Returns a reference to the y-coordinate of this point.
double &	rz ()
	Returns a reference to the z-coordinate of this point.
double	segmentLength (QgsVertexId startVertex) const override
	Returns the length of the segment of the geometry which begins at startVertex.
void	setM (double m)
	Sets the point's m-value.
void	setX (double x)
	Sets the point's x-coordinate.
void	setY (double y)
	Sets the point's y-coordinate.
void	setZ (double z)
	Sets the point's z-coordinate.
QgsPoint *	simplifyByDistance (double tolerance) const override
	Simplifies the geometry by applying the Douglas Peucker simplification by distance algorithm.
QgsPoint *	snappedToGrid (double hSpacing, double vSpacing, double dSpacing=0, double mSpacing=0, bool removeRedundantPoints=false) const override
	Makes a new geometry with all the points or vertices snapped to the closest point of the grid.
void	swapXy () override
	Swaps the x and y coordinates from the geometry.
QgsPoint *	toCurveType () const override
	Returns the geometry converted to the more generic curve type.
QPointF	toQPointF () const
	Returns the point as a QPointF.
void	transform (const QgsCoordinateTransform &ct, Qgis::TransformDirection d=Qgis::TransformDirection::Forward, bool transformZ=false) override
	Transforms the geometry using a coordinate transform.
void	transform (const QTransform &t, double zTranslate=0.0, double zScale=1.0, double mTranslate=0.0, double mScale=1.0) override
	Transforms the x and y components of the geometry using a QTransform object t.
bool	transform (QgsAbstractGeometryTransformer *transformer, QgsFeedback *feedback=nullptr) override
	Transforms the vertices from the geometry in place, using the specified geometry transformer object.
void	transformVertices (const std::function< QgsPoint(const QgsPoint &) > &transform) override
	Transforms the vertices from the geometry in place, applying the transform function to every vertex.
double	vertexAngle (QgsVertexId vertex) const override
	Angle undefined.
QgsPoint	vertexAt (QgsVertexId) const override
	Returns the point corresponding to a specified vertex id.
int	vertexCount (int=0, int=0) const override
	Returns the number of vertices of which this geometry is built.
int	vertexNumberFromVertexId (QgsVertexId id) const override
	Returns the vertex number corresponding to a vertex id.
int	wkbSize (QgsAbstractGeometry::WkbFlags flags=QgsAbstractGeometry::WkbFlags()) const override
	Returns the length of the QByteArray returned by asWkb()
double	x () const
	Returns the point's x-coordinate.
double	y () const
	Returns the point's y-coordinate.
double	z () const
	Returns the point's z-coordinate.
Public Member Functions inherited from QgsAbstractGeometry
	QgsAbstractGeometry ()=default
	Constructor for QgsAbstractGeometry.
	QgsAbstractGeometry (const QgsAbstractGeometry &geom)
virtual	~QgsAbstractGeometry ()=default
virtual double	area () const
	Returns the planar, 2-dimensional area of the geometry.
QString	asJson (int precision=17)
	Returns a GeoJSON representation of the geometry as a QString.
virtual QgsRectangle	boundingBox () const
	Returns the minimal bounding box for the geometry.
virtual QgsPoint	centroid () const
	Returns the centroid of the geometry.
virtual int	compareTo (const QgsAbstractGeometry *other) const
	Comparator for sorting of geometry.
const_part_iterator	const_parts_begin () const
	Returns STL-style iterator pointing to the const first part of the geometry.
const_part_iterator	const_parts_end () const
	Returns STL-style iterator pointing to the imaginary const part after the last part of the geometry.
virtual bool	hasCurvedSegments () const
	Returns true if the geometry contains curved segments.
bool	is3D () const
	Returns true if the geometry is 3D and contains a z-value.
bool	isMeasure () const
	Returns true if the geometry contains m values.
virtual double	length () const
	Returns the planar, 2-dimensional length of the geometry.
QgsAbstractGeometry &	operator= (const QgsAbstractGeometry &geom)
QgsGeometryPartIterator	parts ()
	Returns Java-style iterator for traversal of parts of the geometry.
QgsGeometryConstPartIterator	parts () const
	Returns Java-style iterator for traversal of parts of the geometry.
part_iterator	parts_begin ()
	Returns STL-style iterator pointing to the first part of the geometry.
part_iterator	parts_end ()
	Returns STL-style iterator pointing to the imaginary part after the last part of the geometry.
virtual double	perimeter () const
	Returns the planar, 2-dimensional perimeter of the geometry.
virtual QgsAbstractGeometry *	segmentize (double tolerance=M_PI/180., SegmentationToleranceType toleranceType=MaximumAngle) const
	Returns a version of the geometry without curves.
virtual const QgsAbstractGeometry *	simplifiedTypeRef () const
	Returns a reference to the simplest lossless representation of this geometry, e.g.
QgsVertexIterator	vertices () const
	Returns a read-only, Java-style iterator for traversal of vertices of all the geometry, including all geometry parts and rings.
vertex_iterator	vertices_begin () const
	Returns STL-style iterator pointing to the first vertex of the geometry.
vertex_iterator	vertices_end () const
	Returns STL-style iterator pointing to the imaginary vertex after the last vertex of the geometry.
Qgis::WkbType	wkbType () const
	Returns the WKB type of the geometry.
QString	wktTypeStr () const
	Returns the WKT type string of the geometry.

Static Public Member Functions
static const QgsPoint *	cast (const QgsAbstractGeometry *geom)
	Cast the geom to a QgsPoint.

Protected Member Functions
int	childCount () const override
	Returns number of child geometries (for geometries with child geometries) or child points (for geometries without child geometries - i.e.
QgsPoint	childPoint (int index) const override
	Returns point at index (for geometries without child geometries - i.e.
int	compareToSameClass (const QgsAbstractGeometry *other) const final
	Compares to an other geometry of the same class, and returns a integer for sorting of the two geometries.
Protected Member Functions inherited from QgsAbstractGeometry
virtual QgsRectangle	calculateBoundingBox () const
	Default calculator for the minimal bounding box for the geometry.
virtual QgsBox3D	calculateBoundingBox3D () const
	Calculates the minimal 3D bounding box for the geometry.
virtual QgsAbstractGeometry *	childGeometry (int index) const
	Returns pointer to child geometry (for geometries with child geometries - i.e.
virtual void	clearCache () const
	Clears any cached parameters associated with the geometry, e.g., bounding boxes.
virtual bool	hasChildGeometries () const
	Returns whether the geometry has any child geometries (false for point / curve, true otherwise)
void	setZMTypeFromSubGeometry (const QgsAbstractGeometry *subggeom, Qgis::WkbType baseGeomType)
	Updates the geometry type based on whether sub geometries contain z or m values.
int	sortIndex () const
	Returns the sort index for the geometry, used in the compareTo() method to compare geometries of different types.

Properties
double	m
double	x
double	y
double	z

Additional Inherited Members
Public Types inherited from QgsAbstractGeometry
enum	AxisOrder { XY = 0 , YX }
	Axis order for GML generation. More...
enum	SegmentationToleranceType { MaximumAngle = 0 , MaximumDifference }
	Segmentation tolerance as maximum angle or maximum difference between approximation and circle. More...
enum	WkbFlag { FlagExportTrianglesAsPolygons = 1 << 0 , FlagExportNanAsDoubleMin = 1 << 1 }
	WKB export flags. More...
typedef QFlags< WkbFlag >	WkbFlags
Protected Attributes inherited from QgsAbstractGeometry
Qgis::WkbType	mWkbType = Qgis::WkbType::Unknown

Detailed Description

Point geometry type, with support for z-dimension and m-values.

A QgsPoint represents a 2, 3 or 4-dimensional position, with X and Y and optional Z or M coordinates. Since it supports these additional dimensions, QgsPoint is used as the low-level storage of geometry coordinates throughout QGIS.

In some scenarios it is preferable to use the QgsPointXY class instead, which is lighter and has smaller memory requirements compared to QgsPoint. See the QgsPointXY documentation for examples of situations where it is appropriate to use QgsPointXY instead of QgsPoint.

See also

QgsPointXY

Definition at line 48 of file qgspoint.h.

Constructor & Destructor Documentation

QgsPoint() [1/4]

QgsPoint::QgsPoint	(	double	x = std::numeric_limits<double>::quiet_NaN(),
		double	y = std::numeric_limits<double>::quiet_NaN(),
		double	z = std::numeric_limits<double>::quiet_NaN(),
		double	m = std::numeric_limits<double>::quiet_NaN(),
		Qgis::WkbType	wkbType = Qgis::WkbType::Unknown
	)

Construct a point with the provided initial coordinate values.

If wkbType is set to Qgis::WkbType::Point, Qgis::WkbType::PointZ, Qgis::WkbType::PointM or Qgis::WkbType::PointZM the type will be set accordingly. If it is left to the default Qgis::WkbType::Unknown, the type will be set based on the following rules:

• If only x and y are specified, the type will be a 2D point.
• If any or both of the Z and M are specified, the appropriate type will be created.

pt = QgsPoint(43.4, 5.3)
pt.asWkt() # Point(43.4 5.3)
 
pt_z = QgsPoint(120, 343, 77)
pt_z.asWkt() # PointZ(120 343 77)
 
pt_m = QgsPoint(33, 88, m=5)
pt_m.m() # 5
pt_m.wkbType() # 2001 (QgsWkbTypes.PointM)
 
pt = QgsPoint(30, 40, wkbType=QgsWkbTypes.PointZ)
pt.z() # nan
pt.wkbType() # 1001 (QgsWkbTypes.PointZ)

Definition at line 41 of file qgspoint.cpp.

QgsPoint() [2/4]

QgsPoint::QgsPoint ( const QgsPointXY &  p )

explicit

Construct a QgsPoint from a QgsPointXY object.

Definition at line 65 of file qgspoint.cpp.

QgsPoint() [3/4]

QgsPoint::QgsPoint ( QPointF  p )

explicit

Construct a QgsPoint from a QPointF.

Definition at line 79 of file qgspoint.cpp.

QgsPoint() [4/4]

QgsPoint::QgsPoint ( Qgis::WkbType  wkbType, double  x = std::numeric_limits<double>::quiet_NaN(), double  y = std::numeric_limits<double>::quiet_NaN(), double  z = std::numeric_limits<double>::quiet_NaN(), double  m = std::numeric_limits<double>::quiet_NaN()  )

explicit

Create a new point with the given wkbtype and values.

Note

Not available in Python bindings

Definition at line 88 of file qgspoint.cpp.

Member Function Documentation

addMValue()

bool QgsPoint::addMValue ( double  mValue = 0 )

overridevirtual

Adds a measure to the geometry, initialized to a preset value.

Parameters

mValue

initial m-value for all nodes

Returns

true on success

See also

dropMValue()

addZValue()

Implements QgsAbstractGeometry.

Definition at line 568 of file qgspoint.cpp.

addZValue()

bool QgsPoint::addZValue ( double  zValue = 0 )

overridevirtual

Adds a z-dimension to the geometry, initialized to a preset value.

Parameters

zValue

initial z-value for all nodes

Returns

true on success

See also

dropZValue()

addMValue()

Implements QgsAbstractGeometry.

Definition at line 557 of file qgspoint.cpp.

adjacentVertices()

void QgsPoint::adjacentVertices ( QgsVertexId  vertex, QgsVertexId &  previousVertex, QgsVertexId &  nextVertex  ) const

overridevirtual

Returns the vertices adjacent to a specified vertex within a geometry.

Implements QgsAbstractGeometry.

Definition at line 499 of file qgspoint.cpp.

asGml2()

QDomElement QgsPoint::asGml2 ( QDomDocument &  doc, int  precision = 17, const QString &  ns = "gml", QgsAbstractGeometry::AxisOrder  axisOrder = QgsAbstractGeometry::AxisOrder::XY  ) const

overridevirtual

Returns a GML2 representation of the geometry.

Parameters

doc	DOM document
precision	number of decimal places for coordinates
ns	XML namespace
axisOrder	Axis order for generated GML

See also

asWkb()

asWkt()

asGml3()

asJson()

Implements QgsAbstractGeometry.

Definition at line 284 of file qgspoint.cpp.

asGml3()

QDomElement QgsPoint::asGml3 ( QDomDocument &  doc, int  precision = 17, const QString &  ns = "gml", QgsAbstractGeometry::AxisOrder  axisOrder = QgsAbstractGeometry::AxisOrder::XY  ) const

overridevirtual

Returns a GML3 representation of the geometry.

Parameters

doc	DOM document
precision	number of decimal places for coordinates
ns	XML namespace
axisOrder	Axis order for generated GML

See also

asWkb()

asWkt()

asGml2()

asJson()

Implements QgsAbstractGeometry.

Definition at line 307 of file qgspoint.cpp.

asJsonObject()

json QgsPoint::asJsonObject ( int  precision = 17 ) const

overridevirtual

Returns a json object representation of the geometry.

See also

asWkb()

asWkt()

asGml2()

asGml3()

asJson()

Note

not available in Python bindings

Since

QGIS 3.10

Reimplemented from QgsAbstractGeometry.

Definition at line 326 of file qgspoint.cpp.

asKml()

QString QgsPoint::asKml ( int  precision = 17 ) const

overridevirtual

Returns a KML representation of the geometry.

Since

QGIS 3.12

Implements QgsAbstractGeometry.

Definition at line 345 of file qgspoint.cpp.

asQPainterPath()

QPainterPath QgsPoint::asQPainterPath ( ) const

overridevirtual

Returns the geometry represented as a QPainterPath.

Warning

not all geometry subclasses can be represented by a QPainterPath, e.g. points and multipoint geometries will return an empty path.

Since

QGIS 3.16

Implements QgsAbstractGeometry.

Definition at line 355 of file qgspoint.cpp.

asWkb()

QByteArray QgsPoint::asWkb ( QgsAbstractGeometry::WkbFlags  flags = QgsAbstractGeometry::WkbFlags() ) const

overridevirtual

Returns a WKB representation of the geometry.

The optional flags argument specifies flags controlling WKB export behavior (since QGIS 3.14).

See also

asWkt

asGml2

asGml3

asJson()

Implements QgsAbstractGeometry.

Definition at line 246 of file qgspoint.cpp.

asWkt()

QString QgsPoint::asWkt ( int  precision = 17 ) const

overridevirtual

Returns a WKT representation of the geometry.

Parameters

precision

number of decimal places for coordinates

See also

asWkb()

asGml2()

asGml3()

asJson()

Implements QgsAbstractGeometry.

Definition at line 265 of file qgspoint.cpp.

azimuth()

double QgsPoint::azimuth

(

const QgsPoint &

other

)

const

Calculates Cartesian azimuth between this point and other one (clockwise in degree, starting from north)

Definition at line 686 of file qgspoint.cpp.

boundary()

QgsAbstractGeometry * QgsPoint::boundary ( ) const

overridevirtual

Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the geometry).

For instance, a polygon geometry will have a boundary consisting of the linestrings for each ring in the polygon.

Returns

boundary for geometry. May be nullptr for some geometry types.

Implements QgsAbstractGeometry.

Definition at line 420 of file qgspoint.cpp.

boundingBox3D()

QgsBox3D QgsPoint::boundingBox3D ( ) const

overridevirtual

Returns the 3D bounding box for the geometry.

Since

QGIS 3.34

Implements QgsAbstractGeometry.

Definition at line 742 of file qgspoint.cpp.

boundingBoxIntersects() [1/2]

bool QgsPoint::boundingBoxIntersects ( const QgsBox3D &  box3d ) const

overridevirtual

Returns true if the bounding box of this geometry intersects with a box3d.

Since this test only considers the bounding box of the geometry, is is very fast to calculate and handles invalid geometries.

Since

QGIS 3.34

Reimplemented from QgsAbstractGeometry.

Definition at line 546 of file qgspoint.cpp.

boundingBoxIntersects() [2/2]

bool QgsPoint::boundingBoxIntersects ( const QgsRectangle &  rectangle ) const

overridevirtual

Returns true if the bounding box of this geometry intersects with a rectangle.

Since this test only considers the bounding box of the geometry, is is very fast to calculate and handles invalid geometries.

Since

QGIS 3.20

Reimplemented from QgsAbstractGeometry.

Definition at line 541 of file qgspoint.cpp.

cast()

static const QgsPoint * QgsPoint::cast ( const QgsAbstractGeometry *  geom )

inlinestatic

Cast the geom to a QgsPoint.

Should be used by qgsgeometry_cast<QgsPoint *>( geometry ).

Note

Not available in Python. Objects will be automatically be converted to the appropriate target type.

Definition at line 633 of file qgspoint.h.

childCount()

int QgsPoint::childCount ( ) const

overrideprotectedvirtual

Returns number of child geometries (for geometries with child geometries) or child points (for geometries without child geometries - i.e.

curve / point)

Note

used for vertex_iterator implementation

Reimplemented from QgsAbstractGeometry.

Definition at line 757 of file qgspoint.cpp.

childPoint()

QgsPoint QgsPoint::childPoint ( int  index ) const

overrideprotectedvirtual

Returns point at index (for geometries without child geometries - i.e.

curve / point)

Note

used for vertex_iterator implementation

Reimplemented from QgsAbstractGeometry.

Definition at line 762 of file qgspoint.cpp.

clear()

void QgsPoint::clear ( )

overridevirtual

Clears the geometry, ie reset it to a null geometry.

Implements QgsAbstractGeometry.

Definition at line 360 of file qgspoint.cpp.

clone()

QgsPoint * QgsPoint::clone ( ) const

overridevirtual

Clones the geometry by performing a deep copy.

Implements QgsAbstractGeometry.

Definition at line 104 of file qgspoint.cpp.

closestSegment()

double QgsPoint::closestSegment ( const QgsPoint &  pt, QgsPoint &  segmentPt, QgsVertexId &  vertexAfter, int *  leftOf = nullptr, double  epsilon = 4 *std::numeric_limits< double >::epsilon()  ) const

overridevirtual

Searches for the closest segment of the geometry to a given point.

Parameters

pt	specifies the point to find closest segment to
segmentPt	storage for the closest point within the geometry
vertexAfter	storage for the ID of the vertex at the end of the closest segment
leftOf	indicates whether the point lies on the left side of the geometry (-1 if point is to the left of the geometry, +1 if the point is to the right of the geometry, or 0 for cases where left/right could not be determined, e.g. point exactly on a line) false if point is to right of segment)
epsilon	epsilon for segment snapping

Returns

squared distance to closest segment or negative value on error

Implements QgsAbstractGeometry.

Definition at line 466 of file qgspoint.cpp.

compareToSameClass()

int QgsPoint::compareToSameClass ( const QgsAbstractGeometry *  other ) const

finalprotectedvirtual

Compares to an other geometry of the same class, and returns a integer for sorting of the two geometries.

Note

The actual logic for the sorting is an internal detail only and is subject to change between QGIS versions. The result should only be used for direct comparison of geometries and not stored for later use.

Since

QGIS 3.20

Implements QgsAbstractGeometry.

Definition at line 774 of file qgspoint.cpp.

convertTo()

bool QgsPoint::convertTo ( Qgis::WkbType  type )

overridevirtual

Converts the geometry to a specified type.

Returns

true if conversion was successful

Reimplemented from QgsAbstractGeometry.

Definition at line 626 of file qgspoint.cpp.

coordinateSequence()

QgsCoordinateSequence QgsPoint::coordinateSequence ( ) const

overridevirtual

Retrieves the sequence of geometries, rings and nodes.

Returns

coordinate sequence

Implements QgsAbstractGeometry.

Definition at line 397 of file qgspoint.cpp.

createEmptyWithSameType()

QgsPoint * QgsPoint::createEmptyWithSameType ( ) const

overridevirtual

Creates a new geometry with the same class and same WKB type as the original and transfers ownership.

To create it, the geometry is default constructed and then the WKB is changed.

See also

clone()

Implements QgsAbstractGeometry.

Definition at line 768 of file qgspoint.cpp.

deleteVertex()

bool QgsPoint::deleteVertex ( QgsVertexId  position )

overridevirtual

Deletes a vertex within the geometry.

Parameters

position

vertex id for vertex to delete

Returns

true if delete was successful

See also

insertVertex

moveVertex

Implements QgsAbstractGeometry.

Definition at line 460 of file qgspoint.cpp.

dimension()

int QgsPoint::dimension ( ) const

overridevirtual

Returns the inherent dimension of the geometry.

For example, this is 0 for a point geometry, 1 for a linestring and 2 for a polygon.

Implements QgsAbstractGeometry.

Definition at line 752 of file qgspoint.cpp.

distance() [1/2]

double QgsPoint::distance ( const QgsPoint &  other ) const

inline

Returns the Cartesian 2D distance between this point and another point.

In certain cases it may be more appropriate to call the faster distanceSquared() method, e.g., when comparing distances.

See also

distanceSquared()

Definition at line 404 of file qgspoint.h.

distance() [2/2]

double QgsPoint::distance ( double  x, double  y  ) const

inline

Returns the Cartesian 2D distance between this point and a specified x, y coordinate.

In certain cases it may be more appropriate to call the faster distanceSquared() method, e.g., when comparing distances.

See also

distanceSquared()

Definition at line 393 of file qgspoint.h.

distance3D() [1/2]

double QgsPoint::distance3D ( const QgsPoint &  other ) const

inline

Returns the Cartesian 3D distance between this point and another point.

In certain cases it may be more appropriate to call the faster distanceSquared3D() method, e.g., when comparing distances.

See also

distanceSquared3D()

Definition at line 452 of file qgspoint.h.

distance3D() [2/2]

double QgsPoint::distance3D ( double  x, double  y, double  z  ) const

inline

Returns the Cartesian 3D distance between this point and a specified x, y, z coordinate.

In certain cases it may be more appropriate to call the faster distanceSquared3D() method, e.g., when comparing distances.

See also

distanceSquared3D()

Definition at line 437 of file qgspoint.h.

distanceSquared() [1/2]

double QgsPoint::distanceSquared ( const QgsPoint &  other ) const

inline

Returns the Cartesian 2D squared distance between this point another point.

Calling this is faster than calling distance(), and may be useful in use cases such as comparing distances where the extra expense of calling distance() is not required.

See also

distance()

Definition at line 426 of file qgspoint.h.

distanceSquared() [2/2]

double QgsPoint::distanceSquared ( double  x, double  y  ) const

inline

Returns the Cartesian 2D squared distance between this point a specified x, y coordinate.

Calling this is faster than calling distance(), and may be useful in use cases such as comparing distances where the extra expense of calling distance() is not required.

See also

distance()

Definition at line 415 of file qgspoint.h.

distanceSquared3D() [1/2]

double QgsPoint::distanceSquared3D ( const QgsPoint &  other ) const

inline

Returns the Cartesian 3D squared distance between this point and another point.

Calling this is faster than calling distance3D(), and may be useful in use cases such as comparing distances where the extra expense of calling distance3D() is not required.

See also

distance3D()

Definition at line 482 of file qgspoint.h.

distanceSquared3D() [2/2]

double QgsPoint::distanceSquared3D ( double  x, double  y, double  z  ) const

inline

Returns the Cartesian 3D squared distance between this point and a specified x, y, z coordinate.

Calling this is faster than calling distance3D(), and may be useful in use cases such as comparing distances where the extra expense of calling distance3D() is not required.

See also

distance3D()

Definition at line 467 of file qgspoint.h.

draw()

void QgsPoint::draw ( QPainter &  p ) const

overridevirtual

Draws the geometry using the specified QPainter.

Parameters

p	destination QPainter

Implements QgsAbstractGeometry.

Definition at line 350 of file qgspoint.cpp.

dropMValue()

bool QgsPoint::dropMValue ( )

overridevirtual

Drops any measure values which exist in the geometry.

Returns

true if m-values were present and have been removed

See also

addMValue()

dropZValue()

Implements QgsAbstractGeometry.

Definition at line 609 of file qgspoint.cpp.

dropZValue()

bool QgsPoint::dropZValue ( )

overridevirtual

Drops any z-dimensions which exist in the geometry.

Returns

true if Z values were present and have been removed

See also

addZValue()

dropMValue()

Implements QgsAbstractGeometry.

Definition at line 598 of file qgspoint.cpp.

filterVertices()

void QgsPoint::filterVertices ( const std::function< bool(const QgsPoint &) > &  filter )

overridevirtual

Filters the vertices from the geometry in place, removing any which do not return true for the filter function check.

Has no meaning when called on a single point geometry.

Depending on the filter used, this may result in an invalid geometry.

Note

Not available in Python bindings

Since

QGIS 3.2

Reimplemented from QgsAbstractGeometry.

Definition at line 669 of file qgspoint.cpp.

fromWkb()

bool QgsPoint::fromWkb ( QgsConstWkbPtr &  wkb )

overridevirtual

Sets the geometry from a WKB string.

After successful read the wkb argument will be at the position where the reading has stopped.

See also

fromWkt

Implements QgsAbstractGeometry.

Definition at line 140 of file qgspoint.cpp.

fromWkt()

bool QgsPoint::fromWkt ( const QString &  wkt )

overridevirtual

Sets the geometry from a WKT string.

See also

fromWkb

Implements QgsAbstractGeometry.

Definition at line 168 of file qgspoint.cpp.

fuzzyDistanceEqual()

bool QgsPoint::fuzzyDistanceEqual ( const QgsAbstractGeometry &  other, double  epsilon = 1e-8  ) const

inlineoverridevirtual

Performs fuzzy distance comparison between this geometry and other using an epsilon.

Traditionally, the comparison is done by examining the specific values (such as x and y) that define the location of vertices in the geometry. It focuses on the numerical differences or relationships between these values. On the other hand, comparing distances between points considers the actual spatial separation or length between the points, regardless of their coordinate values. This comparison involves measuring the distance between two points using formulas like the distance formula. Here, it's the "distance comparison" (fuzzyDistanceEqual).

See also

fuzzyEqual

QgsGeometryUtilsBase::fuzzyEqual

Since

QGIS 3.36

Implements QgsAbstractGeometry.

Definition at line 224 of file qgspoint.h.

fuzzyEqual()

bool QgsPoint::fuzzyEqual ( const QgsAbstractGeometry &  other, double  epsilon = 1e-8  ) const

inlineoverridevirtual

Performs fuzzy comparison between this geometry and other using an epsilon.

The comparison is done by examining the specific values (such as x and y) that define the location of vertices in the geometry.

See also

fuzzyDistanceEqual

QgsGeometryUtilsBase::fuzzyDistanceEqual

Since

QGIS 3.36

Implements QgsAbstractGeometry.

Definition at line 195 of file qgspoint.h.

geometryType()

QString QgsPoint::geometryType ( ) const

overridevirtual

Returns a unique string representing the geometry type.

See also

wkbType

wktTypeStr

Implements QgsAbstractGeometry.

Definition at line 747 of file qgspoint.cpp.

inclination()

double QgsPoint::inclination

(

const QgsPoint &

other

)

const

Calculates Cartesian inclination between this point and other one (starting from zenith = 0 to nadir = 180.

Horizon = 90) Returns 90.0 if the distance between this point and other one is equal to 0 (same point).

Definition at line 693 of file qgspoint.cpp.

insertVertex()

bool QgsPoint::insertVertex ( QgsVertexId  position, const QgsPoint &  vertex  )

overridevirtual

Inserts a vertex into the geometry.

Parameters

position	vertex id for position of inserted vertex
vertex	vertex to insert

Returns

true if insert was successful

See also

moveVertex

deleteVertex

Implements QgsAbstractGeometry.

Definition at line 430 of file qgspoint.cpp.

isEmpty()

bool QgsPoint::isEmpty ( ) const

overridevirtual

Returns true if the geometry is empty.

Reimplemented from QgsAbstractGeometry.

Definition at line 737 of file qgspoint.cpp.

isValid()

bool QgsPoint::isValid ( QString &  error, Qgis::GeometryValidityFlags  flags = Qgis::GeometryValidityFlags()  ) const

overridevirtual

Checks validity of the geometry, and returns true if the geometry is valid.

Parameters

error	will be set to the validity error message
flags	indicates optional flags which control the type of validity checking performed (corresponding to Qgis::GeometryValidityFlags).

Returns

true if geometry is valid

Since

QGIS 3.8

Implements QgsAbstractGeometry.

Definition at line 425 of file qgspoint.cpp.

m()

double QgsPoint::m ( ) const

inline

Returns the point's m value.

See also

setM()

rm()

Definition at line 289 of file qgspoint.h.

moveVertex()

bool QgsPoint::moveVertex ( QgsVertexId  position, const QgsPoint &  newPos  )

overridevirtual

Moves a vertex within the geometry.

Parameters

position	vertex id for vertex to move
newPos	new position of vertex

Returns

true if move was successful

See also

insertVertex

deleteVertex

Implements QgsAbstractGeometry.

Definition at line 443 of file qgspoint.cpp.

nCoordinates()

int QgsPoint::nCoordinates ( ) const

overridevirtual

Returns the number of nodes contained in the geometry.

Reimplemented from QgsAbstractGeometry.

Definition at line 407 of file qgspoint.cpp.

nextVertex()

bool QgsPoint::nextVertex ( QgsVertexId &  id, QgsPoint &  vertex  ) const

overridevirtual

Returns next vertex id and coordinates.

Parameters

id	initial value should be the starting vertex id. The next vertex id will be stored in this variable if found.
vertex	container for found node

Returns

false if at end

Implements QgsAbstractGeometry.

Definition at line 477 of file qgspoint.cpp.

normalize()

void QgsPoint::normalize ( )

finalvirtual

Reorganizes the geometry into a normalized form (or "canonical" form).

Polygon rings will be rearranged so that their starting vertex is the lower left and ring orientation follows the right hand rule, collections are ordered by geometry type, and other normalization techniques are applied. The resultant geometry will be geometrically equivalent to the original geometry.

Since

QGIS 3.20

Implements QgsAbstractGeometry.

Definition at line 732 of file qgspoint.cpp.

operator!=()

bool QgsPoint::operator!= ( const QgsAbstractGeometry &  other ) const

inlineoverridevirtual

Implements QgsAbstractGeometry.

Definition at line 258 of file qgspoint.h.

operator+()

QgsPoint QgsPoint::operator+ ( QgsVector  v ) const

inline

Adds a vector to this point.

Definition at line 551 of file qgspoint.h.

operator+=()

QgsPoint & QgsPoint::operator+= ( QgsVector  v )

inline

Adds a vector to this point in place.

Definition at line 541 of file qgspoint.h.

operator-() [1/2]

QgsVector QgsPoint::operator- ( const QgsPoint &  p ) const

inline

Calculates the vector obtained by subtracting a point from this point.

Definition at line 536 of file qgspoint.h.

operator-() [2/2]

QgsPoint QgsPoint::operator- ( QgsVector  v ) const

inline

Subtracts a vector from this point.

Definition at line 556 of file qgspoint.h.

operator-=()

QgsPoint & QgsPoint::operator-= ( QgsVector  v )

inline

Subtracts a vector from this point in place.

Definition at line 546 of file qgspoint.h.

operator==()

bool QgsPoint::operator== ( const QgsAbstractGeometry &  other ) const

inlineoverridevirtual

Implements QgsAbstractGeometry.

Definition at line 253 of file qgspoint.h.

partCount()

int QgsPoint::partCount ( ) const

overridevirtual

Returns count of parts contained in the geometry.

See also

vertexCount

ringCount

Implements QgsAbstractGeometry.

Definition at line 521 of file qgspoint.cpp.

project()

QgsPoint QgsPoint::project	(	double	distance,
		double	azimuth,
		double	inclination = 90.0
	)		const

Returns a new point which corresponds to this point projected by a specified distance with specified angles (azimuth and inclination), using Cartesian mathematics.

M value is preserved.

Parameters

distance	distance to project
azimuth	angle to project in X Y, clockwise in degrees starting from north
inclination	angle to project in Z (3D). If the point is 2D, the Z value is assumed to be 0.

Returns

The point projected. If a 2D point is projected a 3D point will be returned except if inclination is 90. A 3D point is always returned if a 3D point is projected.

Example

p = QgsPoint( 1, 2 ) # 2D point
pr = p.project ( 1, 0 )
# pr is a 2D point: 'Point (1 3)'
pr = p.project ( 1, 0, 90 )
# pr is a 2D point: 'Point (1 3)'
pr = p.project (1, 0, 0 )
# pr is a 3D point: 'PointZ (1 2 nan)'
p = QgsPoint( 1, 2, 2, wkbType=QgsWkbTypes.PointZ ) # 3D point
pr = p.project ( 1, 0 )
# pr is a 3D point: 'PointZ (1 3 2)'
pr = p.project ( 1, 0, 90 )
# pr is a 3D point: 'PointZ (1 3 2)'
pr = p.project (1, 0, 0 )
# pr is a 3D point: 'PointZ (1 2 3)'

Definition at line 705 of file qgspoint.cpp.

removeDuplicateNodes()

bool QgsPoint::removeDuplicateNodes ( double  epsilon = 4 *std::numeric_limits< double >::epsilon(), bool  useZValues = false  )

overridevirtual

Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerate geometry.

The epsilon parameter specifies the tolerance for coordinates when determining that vertices are identical.

By default, z values are not considered when detecting duplicate nodes. E.g. two nodes with the same x and y coordinate but different z values will still be considered duplicate and one will be removed. If useZValues is true, then the z values are also tested and nodes with the same x and y but different z will be maintained.

Note that duplicate nodes are not tested between different parts of a multipart geometry. E.g. a multipoint geometry with overlapping points will not be changed by this method.

The function will return true if nodes were removed, or false if no duplicate nodes were found.

Implements QgsAbstractGeometry.

Definition at line 135 of file qgspoint.cpp.

ringCount()

int QgsPoint::ringCount ( int  part = 0 ) const

overridevirtual

Returns the number of rings of which this geometry is built.

Implements QgsAbstractGeometry.

Definition at line 516 of file qgspoint.cpp.

rm()

double & QgsPoint::rm ( )

inline

Returns a reference to the m value of this point.

Using a reference makes it possible to directly manipulate m in place.

See also

m()

setM()

Note

not available in Python bindings

Definition at line 325 of file qgspoint.h.

rx()

double & QgsPoint::rx ( )

inline

Returns a reference to the x-coordinate of this point.

Using a reference makes it possible to directly manipulate x in place.

See also

x()

setX()

Note

not available in Python bindings

Definition at line 298 of file qgspoint.h.

ry()

double & QgsPoint::ry ( )

inline

Returns a reference to the y-coordinate of this point.

Using a reference makes it possible to directly manipulate y in place.

See also

y()

setY()

Note

not available in Python bindings

Definition at line 307 of file qgspoint.h.

rz()

double & QgsPoint::rz ( )

inline

Returns a reference to the z-coordinate of this point.

Using a reference makes it possible to directly manipulate z in place.

See also

z()

setZ()

Note

not available in Python bindings

Definition at line 316 of file qgspoint.h.

segmentLength()

double QgsPoint::segmentLength ( QgsVertexId  startVertex ) const

overridevirtual

Returns the length of the segment of the geometry which begins at startVertex.

Warning

QgsAbstractGeometry objects are inherently Cartesian/planar geometries, and the lengths returned by this method are calculated using strictly Cartesian mathematics.

Implements QgsAbstractGeometry.

Definition at line 536 of file qgspoint.cpp.

setM()

void QgsPoint::setM ( double  m )

inline

Sets the point's m-value.

Note

calling this will have no effect if the point does not contain a m-dimension. Use addMValue() to add a m value and force the point to have an m dimension.

See also

m()

rm()

Definition at line 371 of file qgspoint.h.

setX()

void QgsPoint::setX ( double  x )

inline

Sets the point's x-coordinate.

See also

x()

rx()

Definition at line 332 of file qgspoint.h.

setY()

void QgsPoint::setY ( double  y )

inline

Sets the point's y-coordinate.

See also

y()

ry()

Definition at line 343 of file qgspoint.h.

setZ()

void QgsPoint::setZ ( double  z )

inline

Sets the point's z-coordinate.

Note

calling this will have no effect if the point does not contain a z-dimension. Use addZValue() to add a z value and force the point to have a z dimension.

See also

z()

rz()

Definition at line 356 of file qgspoint.h.

simplifyByDistance()

QgsPoint * QgsPoint::simplifyByDistance ( double  tolerance ) const

overridevirtual

Simplifies the geometry by applying the Douglas Peucker simplification by distance algorithm.

The caller takes ownership of the returned geometry. Curved geometries will be segmentized prior to simplification.

If a simplified geometry cannot be calculated nullptr will be returned.

The returned geometry may be invalid and contain self-intersecting rings.

Since

QGIS 3.38

Implements QgsAbstractGeometry.

Definition at line 130 of file qgspoint.cpp.

snappedToGrid()

QgsPoint * QgsPoint::snappedToGrid ( double  hSpacing, double  vSpacing, double  dSpacing = 0, double  mSpacing = 0, bool  removeRedundantPoints = false  ) const

overridevirtual

Makes a new geometry with all the points or vertices snapped to the closest point of the grid.

Ownership is transferred to the caller.

If the gridified geometry could not be calculated nullptr will be returned. It may generate an invalid geometry (in some corner cases). It can also be thought as rounding the edges and it may be useful for removing errors.

Example:

geometry.snappedToGrid(1, 1)

In this case we use a 2D grid of 1x1 to gridify. In this case, it can be thought like rounding the x and y of all the points/vertices to full units (remove all decimals).

Parameters

hSpacing	Horizontal spacing of the grid (x axis). 0 to disable.
vSpacing	Vertical spacing of the grid (y axis). 0 to disable.
dSpacing	Depth spacing of the grid (z axis). 0 (default) to disable.
mSpacing	Custom dimension spacing of the grid (m axis). 0 (default) to disable.
removeRedundantPoints	if true, then points which are redundant (e.g. they represent mid points on a straight line segment) will be skipped (since QGIS 3.38)

Implements QgsAbstractGeometry.

Definition at line 109 of file qgspoint.cpp.

swapXy()

void QgsPoint::swapXy ( )

overridevirtual

Swaps the x and y coordinates from the geometry.

This can be used to repair geometries which have accidentally had their latitude and longitude coordinates reversed.

Since

QGIS 3.2

Implements QgsAbstractGeometry.

Definition at line 620 of file qgspoint.cpp.

toCurveType()

QgsPoint * QgsPoint::toCurveType ( ) const

overridevirtual

Returns the geometry converted to the more generic curve type.

E.g. QgsLineString -> QgsCompoundCurve, QgsPolygon -> QgsCurvePolygon, QgsMultiLineString -> QgsMultiCurve, QgsMultiPolygon -> QgsMultiSurface

Returns

the converted geometry. Caller takes ownership

Implements QgsAbstractGeometry.

Definition at line 531 of file qgspoint.cpp.

toQPointF()

QPointF QgsPoint::toQPointF ( ) const

inline

Returns the point as a QPointF.

Definition at line 382 of file qgspoint.h.

transform() [1/3]

void QgsPoint::transform ( const QgsCoordinateTransform &  ct, Qgis::TransformDirection  d = Qgis::TransformDirection::Forward, bool  transformZ = false  )

overridevirtual

Transforms the geometry using a coordinate transform.

Parameters

ct	coordinate transform
d	transformation direction
transformZ	set to true to also transform z coordinates. This requires that the z coordinates in the geometry represent height relative to the vertical datum of the source CRS (generally ellipsoidal heights) and are expressed in its vertical units (generally meters). If false, then z coordinates will not be changed by the transform.

Implements QgsAbstractGeometry.

Definition at line 383 of file qgspoint.cpp.

transform() [2/3]

void QgsPoint::transform ( const QTransform &  t, double  zTranslate = 0.0, double  zScale = 1.0, double  mTranslate = 0.0, double  mScale = 1.0  )

overridevirtual

Transforms the x and y components of the geometry using a QTransform object t.

Optionally, the geometry's z values can be scaled via zScale and translated via zTranslate. Similarly, m-values can be scaled via mScale and translated via mTranslate.

Implements QgsAbstractGeometry.

Definition at line 579 of file qgspoint.cpp.

transform() [3/3]

bool QgsPoint::transform ( QgsAbstractGeometryTransformer *  transformer, QgsFeedback *  feedback = nullptr  )

overridevirtual

Transforms the vertices from the geometry in place, using the specified geometry transformer object.

Depending on the transformer used, this may result in an invalid geometry.

The optional feedback argument can be used to cancel the transformation before it completes. If this is done, the geometry will be left in a semi-transformed state.

Returns

true if the geometry was successfully transformed.

Since

QGIS 3.18

Implements QgsAbstractGeometry.

Definition at line 659 of file qgspoint.cpp.

transformVertices()

void QgsPoint::transformVertices ( const std::function< QgsPoint(const QgsPoint &) > &  transform )

overridevirtual

Transforms the vertices from the geometry in place, applying the transform function to every vertex.

Depending on the transform used, this may result in an invalid geometry.

Transform functions are not permitted to alter the dimensionality of vertices. If a transform which adds (or removes) z/m values is desired, first call the corresponding addZValue() or addMValue() function to change the geometry's dimensionality and then transform.

Note

Not available in Python bindings

Since

QGIS 3.4

Reimplemented from QgsAbstractGeometry.

Definition at line 674 of file qgspoint.cpp.

vertexAngle()

double QgsPoint::vertexAngle ( QgsVertexId  vertex ) const

overridevirtual

Angle undefined.

Always returns 0.0

Parameters

vertex

the vertex id

Returns

0.0

Implements QgsAbstractGeometry.

Definition at line 505 of file qgspoint.cpp.

vertexAt()

QgsPoint QgsPoint::vertexAt ( QgsVertexId  id ) const

overridevirtual

Returns the point corresponding to a specified vertex id.

Implements QgsAbstractGeometry.

Definition at line 526 of file qgspoint.cpp.

vertexCount()

int QgsPoint::vertexCount ( int  part = 0, int  ring = 0  ) const

overridevirtual

Returns the number of vertices of which this geometry is built.

Implements QgsAbstractGeometry.

Definition at line 511 of file qgspoint.cpp.

vertexNumberFromVertexId()

int QgsPoint::vertexNumberFromVertexId ( QgsVertexId  id ) const

overridevirtual

Returns the vertex number corresponding to a vertex id.

The vertex numbers start at 0, so a return value of 0 corresponds to the first vertex.

Returns -1 if a corresponding vertex could not be found.

Implements QgsAbstractGeometry.

Definition at line 412 of file qgspoint.cpp.

wkbSize()

int QgsPoint::wkbSize ( QgsAbstractGeometry::WkbFlags  flags = QgsAbstractGeometry::WkbFlags() ) const

overridevirtual

Returns the length of the QByteArray returned by asWkb()

The optional flags argument specifies flags controlling WKB export behavior

Since

QGIS 3.16

Implements QgsAbstractGeometry.

Definition at line 239 of file qgspoint.cpp.

x()

double QgsPoint::x ( ) const

inline

Returns the point's x-coordinate.

See also

setX()

rx()

Definition at line 268 of file qgspoint.h.

y()

double QgsPoint::y ( ) const

inline

Returns the point's y-coordinate.

See also

setY()

ry()

Definition at line 275 of file qgspoint.h.

z()

double QgsPoint::z ( ) const

inline

Returns the point's z-coordinate.

See also

setZ()

rz()

Definition at line 282 of file qgspoint.h.

Property Documentation

m

double QgsPoint::m

readwrite

Definition at line 55 of file qgspoint.h.

x

double QgsPoint::x

readwrite

Definition at line 52 of file qgspoint.h.

y

double QgsPoint::y

readwrite

Definition at line 53 of file qgspoint.h.

z

double QgsPoint::z

readwrite

Definition at line 54 of file qgspoint.h.

---

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

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