Triangulated surface geometry type. More...

#include <qgstriangulatedsurface.h>

Inheritance diagram for QgsTriangulatedSurface:

[legend]

Public Member Functions
	QgsTriangulatedSurface ()

	QgsTriangulatedSurface (const QgsTriangulatedSurface &p)

	~QgsTriangulatedSurface () override

void	addPatch (QgsPolygon *patch) override
	Adds a patch to the geometry, transferring ownership to the polyhedral surface.

void	addTriangle (QgsTriangle *triangle)
	Adds a triangle to the geometry, transferring ownership to the polyhedral surface.

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.

QString	asKml (int precision=17) const override
	Returns a KML representation of the geometry.

void	clear () override
	Clears the geometry, ie reset it to a null geometry.

QgsTriangulatedSurface *	clone () const override
	Clones the geometry by performing a deep copy.

QgsTriangulatedSurface *	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.

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.

bool	insertVertex (QgsVertexId position, const QgsPoint &vertex) override
	Inserts a vertex into the geometry.

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

bool	operator!= (const QgsAbstractGeometry &other) const override

QgsTriangulatedSurface &	operator= (const QgsTriangulatedSurface &p)

bool	operator== (const QgsAbstractGeometry &other) const override

void	setTriangles (const QVector< QgsTriangle * > &triangles)
	Sets all triangles, transferring ownership to the polyhedral surface.

QgsTriangulatedSurface *	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.

QgsTriangle *	triangleN (int index)
	Returns the triangle with the specified index.

const QgsTriangle *	triangleN (int index) const
	Returns the triangle with the specified index.

Public Member Functions inherited from QgsPolyhedralSurface
	QgsPolyhedralSurface ()

	QgsPolyhedralSurface (const QgsMultiPolygon *multiPolygon)
	Creates a polyhedral surface from a multiPolygon.

	QgsPolyhedralSurface (const QgsPolyhedralSurface &p)

	~QgsPolyhedralSurface () override

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.

double	area () const override
	Returns the planar, 2-dimensional area of the geometry.

json	asJsonObject (int precision=17) const override
	Returns a json object representation of the geometry.

QPainterPath	asQPainterPath () const override
	Returns the geometry represented as a QPainterPath.

QByteArray	asWkb (QgsAbstractGeometry::WkbFlags flags=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.

QgsAbstractGeometry *	boundary () const override
	Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the geometry).

bool	boundingBoxIntersects (const QgsBox3D &box3d) const override
	Returns `true` if the bounding box of this geometry intersects with a box3d.

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.

QgsCoordinateSequence	coordinateSequence () const override
	Retrieves the sequence of geometries, rings and nodes.

int	dimension () const final
	Returns the inherent dimension of the geometry.

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	hasCurvedSegments () const final
	Returns `true` if the geometry contains curved segments.

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.

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.

int	numPatches () const
	Returns the number of patches contained with the polyhedral surface.

QgsPolyhedralSurface &	operator= (const QgsPolyhedralSurface &p)

int	partCount () const override
	Returns count of parts contained in the geometry.

QgsPolygon *	patchN (int i)
	Retrieves a patch from the polyhedral surface.

const QgsPolygon *	patchN (int i) const
	Retrieves a patch from the polyhedral surface.

double	perimeter () const override
	Returns the planar, 2-dimensional perimeter of the geometry.

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.

bool	removePatch (int patchIndex)
	Removes a patch from the polyhedral surface.

int	ringCount (int part=0) const override
	Returns the number of rings of which this geometry is built.

QgsAbstractGeometry *	segmentize (double tolerance=M_PI_2/90, SegmentationToleranceType toleranceType=MaximumAngle) const override
	Returns a geometry without curves.

double	segmentLength (QgsVertexId startVertex) const override
	Returns the length of the segment of the geometry which begins at startVertex.

virtual void	setPatches (const QVector< QgsPolygon * > &patches)
	Sets all patches, transferring ownership to the polyhedral surface.

QgsPolyhedralSurface *	simplifyByDistance (double tolerance) const override
	Simplifies the geometry by applying the Douglas Peucker simplification by distance algorithm.

void	swapXy () override
	Swaps the x and y coordinates from the geometry.

QgsMultiSurface *	toCurveType () const override
	Returns the geometry converted to the more generic curve type.

QgsMultiPolygon *	toMultiPolygon () const
	Converts a polyhedral surface to a multipolygon.

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
	Returns approximate rotation angle for a vertex.

QgsPoint	vertexAt (QgsVertexId id) const override
	Returns the point corresponding to a specified vertex id.

int	vertexCount (int part=0, int ring=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()

Public Member Functions inherited from QgsSurface
QgsBox3D	boundingBox3D () const override
	Returns the 3D bounding box for the geometry.

bool	isValid (QString &error, Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const override
	Checks validity of the geometry, and returns `true` if the geometry is valid.

Public Member Functions inherited from QgsAbstractGeometry
	QgsAbstractGeometry ()=default

	QgsAbstractGeometry (const QgsAbstractGeometry &geom)

virtual	~QgsAbstractGeometry ()=default

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 bool	boundingBoxIntersects (const QgsRectangle &rectangle) const
	Returns `true` if the bounding box of this geometry intersects with a rectangle.

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	convertTo (Qgis::WkbType type)
	Converts the geometry to a specified type.

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 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 QgsTriangulatedSurface *	cast (const QgsAbstractGeometry *geom)
	Cast the geom to a QgsTriangulatedSurface.

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

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

Protected Member Functions
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 QgsPolyhedralSurface
QgsBox3D	calculateBoundingBox3D () const override
	Calculates the minimal 3D bounding box for the geometry.

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

QgsAbstractGeometry *	childGeometry (int index) const override
	Returns pointer to child geometry (for geometries with child geometries - i.e.

Protected Member Functions inherited from QgsSurface
void	clearCache () const override
	Clears any cached parameters associated with the geometry, e.g., bounding boxes.

Protected Member Functions inherited from QgsAbstractGeometry
virtual QgsRectangle	calculateBoundingBox () const
	Default calculator for the minimal bounding box for the geometry.

virtual QgsPoint	childPoint (int index) const
	Returns point at index (for geometries without child geometries - i.e.

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.

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 QgsPolyhedralSurface
QVector< QgsPolygon * >	mPatches

Protected Attributes inherited from QgsSurface
QgsBox3D	mBoundingBox

bool	mHasCachedValidity = false

QString	mValidityFailureReason

Protected Attributes inherited from QgsAbstractGeometry
Qgis::WkbType	mWkbType = Qgis::WkbType::Unknown

Detailed Description

Triangulated surface geometry type.

A TIN (triangulated irregular network) is a PolyhedralSurface consisting only of triangle patches.

Since: QGIS 3.40

Definition at line 37 of file qgstriangulatedsurface.h.

Constructor & Destructor Documentation

◆ QgsTriangulatedSurface() [1/2]

QgsTriangulatedSurface::QgsTriangulatedSurface ( )

Definition at line 28 of file qgstriangulatedsurface.cpp.

◆ QgsTriangulatedSurface() [2/2]

QgsTriangulatedSurface::QgsTriangulatedSurface ( const QgsTriangulatedSurface & p )

Definition at line 50 of file qgstriangulatedsurface.cpp.

◆ ~QgsTriangulatedSurface()

QgsTriangulatedSurface::~QgsTriangulatedSurface ( )

override

Definition at line 33 of file qgstriangulatedsurface.cpp.

Member Function Documentation

◆ addPatch()

void QgsTriangulatedSurface::addPatch ( QgsPolygon * patch )

overridevirtual

Adds a patch to the geometry, transferring ownership to the polyhedral surface.

Reimplemented from QgsPolyhedralSurface.

Definition at line 251 of file qgstriangulatedsurface.cpp.

◆ addTriangle()

void QgsTriangulatedSurface::addTriangle ( QgsTriangle * triangle )

Adds a triangle to the geometry, transferring ownership to the polyhedral surface.

Definition at line 283 of file qgstriangulatedsurface.cpp.

◆ asGml2()

QDomElement QgsTriangulatedSurface::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()

Reimplemented from QgsPolyhedralSurface.

Definition at line 164 of file qgstriangulatedsurface.cpp.

◆ asGml3()

QDomElement QgsTriangulatedSurface::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()

Reimplemented from QgsPolyhedralSurface.

Definition at line 170 of file qgstriangulatedsurface.cpp.

◆ asKml()

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

overridevirtual

Returns a KML representation of the geometry.

Since: QGIS 3.12

Reimplemented from QgsPolyhedralSurface.

Definition at line 192 of file qgstriangulatedsurface.cpp.

◆ cast()

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

inlinestatic

Cast the geom to a QgsTriangulatedSurface.

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

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

Definition at line 183 of file qgstriangulatedsurface.h.

◆ clear()

void QgsTriangulatedSurface::clear ( )

overridevirtual

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

Reimplemented from QgsPolyhedralSurface.

Definition at line 72 of file qgstriangulatedsurface.cpp.

◆ clone()

QgsTriangulatedSurface * QgsTriangulatedSurface::clone ( ) const

overridevirtual

Clones the geometry by performing a deep copy.

Reimplemented from QgsPolyhedralSurface.

Definition at line 67 of file qgstriangulatedsurface.cpp.

◆ compareToSameClass()

int QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 311 of file qgstriangulatedsurface.cpp.

◆ createEmptyWithSameType()

QgsTriangulatedSurface * QgsTriangulatedSurface::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()

Reimplemented from QgsPolyhedralSurface.

Definition at line 38 of file qgstriangulatedsurface.cpp.

◆ deleteVertex()

bool QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 305 of file qgstriangulatedsurface.cpp.

◆ fromWkb()

bool QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 81 of file qgstriangulatedsurface.cpp.

◆ fromWkt()

bool QgsTriangulatedSurface::fromWkt ( const QString & wkt )

overridevirtual

Sets the geometry from a WKT string.

See also: fromWkb

Reimplemented from QgsPolyhedralSurface.

Definition at line 120 of file qgstriangulatedsurface.cpp.

◆ fuzzyDistanceEqual()

bool QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 88 of file qgstriangulatedsurface.h.

◆ fuzzyEqual()

bool QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 84 of file qgstriangulatedsurface.h.

◆ geometryType()

QString QgsTriangulatedSurface::geometryType ( ) const

overridevirtual

Returns a unique string representing the geometry type.

See also: wkbType; wktTypeStr

Reimplemented from QgsPolyhedralSurface.

Definition at line 45 of file qgstriangulatedsurface.cpp.

◆ insertVertex()

bool QgsTriangulatedSurface::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

Reimplemented from QgsPolyhedralSurface.

Definition at line 298 of file qgstriangulatedsurface.cpp.

◆ normalize()

void QgsTriangulatedSurface::normalize ( )

overridevirtual

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

Reimplemented from QgsPolyhedralSurface.

Definition at line 198 of file qgstriangulatedsurface.cpp.

◆ operator!=()

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

inlineoverridevirtual

Reimplemented from QgsPolyhedralSurface.

Definition at line 98 of file qgstriangulatedsurface.h.

◆ operator=()

QgsTriangulatedSurface & QgsTriangulatedSurface::operator= ( const QgsTriangulatedSurface & p )

Definition at line 58 of file qgstriangulatedsurface.cpp.

◆ operator==()

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

inlineoverridevirtual

Reimplemented from QgsPolyhedralSurface.

Definition at line 93 of file qgstriangulatedsurface.h.

◆ setTriangles()

void QgsTriangulatedSurface::setTriangles ( const QVector< QgsTriangle * > & triangles )

Sets all triangles, transferring ownership to the polyhedral surface.

Definition at line 238 of file qgstriangulatedsurface.cpp.

◆ snappedToGrid()

QgsTriangulatedSurface * QgsTriangulatedSurface::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)

Reimplemented from QgsPolyhedralSurface.

Definition at line 214 of file qgstriangulatedsurface.cpp.

◆ triangleN() [1/2]

QgsTriangle * QgsTriangulatedSurface::triangleN ( int index )

Returns the triangle with the specified index.

Definition at line 288 of file qgstriangulatedsurface.cpp.

◆ triangleN() [2/2]

const QgsTriangle * QgsTriangulatedSurface::triangleN ( int index ) const

Returns the triangle with the specified index.

Note: Not available in Python bindings

Definition at line 293 of file qgstriangulatedsurface.cpp.

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

/build/qgis-3.40.0+99sid/src/core/geometry/qgstriangulatedsurface.h
/build/qgis-3.40.0+99sid/src/core/geometry/qgstriangulatedsurface.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsTriangulatedSurface() [1/2]

◆ QgsTriangulatedSurface() [2/2]

◆ ~QgsTriangulatedSurface()

Member Function Documentation

◆ addPatch()

◆ addTriangle()

◆ asGml2()

◆ asGml3()

◆ asKml()

◆ cast()

◆ clear()

◆ clone()

◆ compareToSameClass()

◆ createEmptyWithSameType()

◆ deleteVertex()

◆ fromWkb()

◆ fromWkt()

◆ fuzzyDistanceEqual()

◆ fuzzyEqual()

◆ geometryType()

◆ insertVertex()

◆ normalize()

◆ operator!=()

◆ operator=()

◆ operator==()

◆ setTriangles()

◆ snappedToGrid()

◆ triangleN() [1/2]

◆ triangleN() [2/2]