QgsTessellatedPolygonGeometry Class Reference

3 Class derived from Qt3DRender::QGeometry that represents polygons tessellated into 3D geometry. More...

#include <qgstessellatedpolygongeometry.h>

Inheritance diagram for QgsTessellatedPolygonGeometry:

Public Member Functions
	QgsTessellatedPolygonGeometry (QNode *parent=nullptr)
	Constructor. More...
bool	addBackFaces () const
	Returns whether also triangles facing the other side will be created. More...
bool	invertNormals () const
	Returns whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders) More...
void	setAddBackFaces (bool add)
	Sets whether also triangles facing the other side will be created. More...
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. More...
void	setInvertNormals (bool invert)
	Sets whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders) More...
void	setPolygons (const QList< QgsPolygon *> &polygons, const QList< QgsFeatureId > &featureIds, const QgsPointXY &origin, float extrusionHeight, const QList< float > &extrusionHeightPerPolygon=QList< float >())
	Initializes vertex buffer from given polygons. Takes ownership of passed polygon geometries. More...
QgsFeatureId	triangleIndexToFeatureId (uint triangleIndex) const
	Returns ID of the feature to which given triangle index belongs (used for picking). More...

Detailed Description

3 Class derived from Qt3DRender::QGeometry 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.

Since

QGIS 3.0

Definition at line 38 of file qgstessellatedpolygongeometry.h.

Constructor & Destructor Documentation

QgsTessellatedPolygonGeometry()

QgsTessellatedPolygonGeometry::QgsTessellatedPolygonGeometry

(

QNode *

parent = nullptr

)

Constructor.

Definition at line 28 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 54 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 46 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 60 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 93 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 48 of file qgstessellatedpolygongeometry.h.

setPolygons()

void QgsTessellatedPolygonGeometry::setPolygons	(	const QList< QgsPolygon *> &	polygons,
		const QList< QgsFeatureId > &	featureIds,
		const QgsPointXY &	origin,
		float	extrusionHeight,
		const QList< float > &	extrusionHeightPerPolygon = QList<float>()
	)

Initializes vertex buffer from given polygons. Takes ownership of passed polygon geometries.

Definition at line 63 of file qgstessellatedpolygongeometry.cpp.

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 132 of file qgstessellatedpolygongeometry.cpp.

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

• /build/qgis-3.12.1+28bionic/src/3d/qgstessellatedpolygongeometry.h
• /build/qgis-3.12.1+28bionic/src/3d/qgstessellatedpolygongeometry.cpp