QgsTessellatedPolygonGeometry Class Reference

Qt3DRender::QGeometry subclass that represents polygons tessellated into 3D geometry. More...

#include <qgstessellatedpolygongeometry.h>

Inheritance diagram for QgsTessellatedPolygonGeometry:

Public Member Functions
	QgsTessellatedPolygonGeometry (bool _withNormals=true, bool invertNormals=false, bool addBackFaces=false, bool addTextureCoords=false, QNode *parent=nullptr)
	Constructor.
bool	addBackFaces () const
	Returns whether also triangles facing the other side will be created.
QVector< QgsFeatureId >	featureIds () const
	Returns included feature ids.
bool	invertNormals () const
	Returns whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)
void	setAddBackFaces (bool add)
	Sets whether also triangles facing the other side will be created.
void	setAddTextureCoords (bool add)
	Sets whether the texture coordinates will be generated.
void	setData (const QByteArray &vertexBufferData, int vertexCount, const QVector< QgsFeatureId > &triangleIndexFids, const QVector< uint > &triangleIndexStartingIndices)
	Initializes vertex buffer (and other members) from data that were already tessellated.
void	setInvertNormals (bool invert)
	Sets whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)
QVector< uint >	triangleIndexStartingIndices () const
	Returns triangle index for features. For a feature featureIds()[i], matching triangles start at triangleIndexStartingIndices()[i].
QgsFeatureId	triangleIndexToFeatureId (uint triangleIndex) const
	Returns ID of the feature to which given triangle index belongs (used for picking).

Friends
class	Qgs3DSceneExporter

Detailed Description

Qt3DRender::QGeometry subclass that represents polygons tessellated into 3D geometry.

Takes a list of polygons as input, internally it does tessellation and writes output to the internal vertex buffer. Optionally it can add "walls" if the extrusion height is non-zero.

Note

Not available in Python bindings

Definition at line 63 of file qgstessellatedpolygongeometry.h.

Constructor & Destructor Documentation

QgsTessellatedPolygonGeometry()

QgsTessellatedPolygonGeometry::QgsTessellatedPolygonGeometry	(	bool	_withNormals = true,
		bool	invertNormals = false,
		bool	addBackFaces = false,
		bool	addTextureCoords = false,
		QNode *	parent = nullptr
	)

Constructor.

Definition at line 38 of file qgstessellatedpolygongeometry.cpp.

Member Function Documentation

addBackFaces()

bool QgsTessellatedPolygonGeometry::addBackFaces ( ) const

inline

Returns whether also triangles facing the other side will be created.

Useful if input data have inconsistent order of vertices

Since

QGIS 3.2

Definition at line 80 of file qgstessellatedpolygongeometry.h.

featureIds()

QVector< QgsFeatureId > QgsTessellatedPolygonGeometry::featureIds ( ) const

inline

Returns included feature ids.

Definition at line 108 of file qgstessellatedpolygongeometry.h.

invertNormals()

bool QgsTessellatedPolygonGeometry::invertNormals ( ) const

inline

Returns whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)

Definition at line 72 of file qgstessellatedpolygongeometry.h.

setAddBackFaces()

void QgsTessellatedPolygonGeometry::setAddBackFaces ( bool  add )

inline

Sets whether also triangles facing the other side will be created.

Useful if input data have inconsistent order of vertices

Since

QGIS 3.2

Definition at line 86 of file qgstessellatedpolygongeometry.h.

setAddTextureCoords()

void QgsTessellatedPolygonGeometry::setAddTextureCoords ( bool  add )

inline

Sets whether the texture coordinates will be generated.

Since

QGIS 3.16

Definition at line 92 of file qgstessellatedpolygongeometry.h.

setData()

void QgsTessellatedPolygonGeometry::setData	(	const QByteArray &	vertexBufferData,
		int	vertexCount,
		const QVector< QgsFeatureId > &	triangleIndexFids,
		const QVector< uint > &	triangleIndexStartingIndices
	)

Initializes vertex buffer (and other members) from data that were already tessellated.

This is an alternative to setPolygons() - this method does not do any expensive work in the body.

Since

QGIS 3.12

Definition at line 86 of file qgstessellatedpolygongeometry.cpp.

setInvertNormals()

void QgsTessellatedPolygonGeometry::setInvertNormals ( bool  invert )

inline

Sets whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)

Definition at line 74 of file qgstessellatedpolygongeometry.h.

triangleIndexStartingIndices()

QVector< uint > QgsTessellatedPolygonGeometry::triangleIndexStartingIndices ( ) const

inline

Returns triangle index for features. For a feature featureIds()[i], matching triangles start at triangleIndexStartingIndices()[i].

Definition at line 111 of file qgstessellatedpolygongeometry.h.

triangleIndexToFeatureId()

QgsFeatureId QgsTessellatedPolygonGeometry::triangleIndexToFeatureId

(

uint

triangleIndex

)

const

Returns ID of the feature to which given triangle index belongs (used for picking).

In case such triangle index does not match any feature, FID_NULL is returned.

Definition at line 129 of file qgstessellatedpolygongeometry.cpp.

Friends And Related Symbol Documentation

Qgs3DSceneExporter

friend class Qgs3DSceneExporter

friend

Definition at line 113 of file qgstessellatedpolygongeometry.h.

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

• /build/qgis-3.99.0+git20250718+f78f5286a64+99sid/src/3d/qgstessellatedpolygongeometry.h
• /build/qgis-3.99.0+git20250718+f78f5286a64+99sid/src/3d/qgstessellatedpolygongeometry.cpp