A terrain provider where the terrain source is a raster DEM layer. More...

#include <qgsterrainprovider.h>

Inheritance diagram for QgsRasterDemTerrainProvider:

Public Member Functions
	QgsRasterDemTerrainProvider ()=default

QgsRasterDemTerrainProvider *	clone () const override
	Creates a clone of the provider and returns the new object.

QgsCoordinateReferenceSystem	crs () const override
	Returns the native coordinate reference system of the terrain provider.

bool	equals (const QgsAbstractTerrainProvider *other) const override
	Returns `true` if the provider is equal to other.

double	heightAt (double x, double y) const override
	Returns the height at the point (x,y) in the terrain provider's native crs().

QgsRasterLayer *	layer () const
	Returns the raster layer with elevation model to be used as the terrain source.

const QgsRasterDemTerrainProvider *	operator= (const QgsRasterDemTerrainProvider &other)=delete

void	prepare () override
	Called on the main thread prior to accessing the provider from a background thread.

bool	readXml (const QDomElement &element, const QgsReadWriteContext &context) override
	Reads the terrain provider state from a DOM element.

void	resolveReferences (const QgsProject *project) override
	Resolves reference to layers from stored layer ID (if it has not been resolved already)

void	setLayer (QgsRasterLayer *layer)
	Sets the raster layer with elevation model to be used as the terrain source.

QString	type () const override
	Returns the unique type ID string for the provider.

QDomElement	writeXml (QDomDocument &document, const QgsReadWriteContext &context) const override
	Returns a DOM element representing the state of the terrain provider.

Public Member Functions inherited from QgsAbstractTerrainProvider
virtual	~QgsAbstractTerrainProvider ()

double	offset () const
	Returns the vertical offset value, used for adjusting the heights from the terrain provider.

QgsAbstractTerrainProvider &	operator= (const QgsAbstractTerrainProvider &other)=delete

double	scale () const
	Returns the vertical scale factor, which can be used to exaggerate vertical heights.

void	setOffset (double offset)
	Returns the vertical offset value, used for adjusting the heights from the terrain provider.

void	setScale (double scale)
	Sets the vertical scale factor, which can be used to exaggerate vertical heights.

Additional Inherited Members
Protected Member Functions inherited from QgsAbstractTerrainProvider
	QgsAbstractTerrainProvider ()=default

	QgsAbstractTerrainProvider (const QgsAbstractTerrainProvider &other)

void	readCommonProperties (const QDomElement &element, const QgsReadWriteContext &context)
	Reads common properties from a DOM element.

void	writeCommonProperties (QDomElement &element, const QgsReadWriteContext &context) const
	Writes common properties to a DOM element.

Protected Attributes inherited from QgsAbstractTerrainProvider
double	mOffset = 0.0
	Offset amount.

double	mScale = 1.0
	Scale factor.

Detailed Description

A terrain provider where the terrain source is a raster DEM layer.

Since: QGIS 3.26

Definition at line 217 of file qgsterrainprovider.h.

Constructor & Destructor Documentation

◆ QgsRasterDemTerrainProvider()

QgsRasterDemTerrainProvider::QgsRasterDemTerrainProvider ( )

default

Member Function Documentation

◆ clone()

QgsRasterDemTerrainProvider * QgsRasterDemTerrainProvider::clone ( ) const

overridevirtual

Creates a clone of the provider and returns the new object.

Ownership is transferred to the caller.

Implements QgsAbstractTerrainProvider.

Definition at line 181 of file qgsterrainprovider.cpp.

◆ crs()

QgsCoordinateReferenceSystem QgsRasterDemTerrainProvider::crs ( ) const

overridevirtual

Returns the native coordinate reference system of the terrain provider.

Implements QgsAbstractTerrainProvider.

Definition at line 154 of file qgsterrainprovider.cpp.

◆ equals()

bool QgsRasterDemTerrainProvider::equals ( const QgsAbstractTerrainProvider * other ) const

overridevirtual

Returns true if the provider is equal to other.

Implements QgsAbstractTerrainProvider.

Definition at line 186 of file qgsterrainprovider.cpp.

◆ heightAt()

double QgsRasterDemTerrainProvider::heightAt	(	double	x,
		double	y
	)		const

overridevirtual

Returns the height at the point (x,y) in the terrain provider's native crs().

Returns NaN if the height could not be obtained at the specified point.

Implements QgsAbstractTerrainProvider.

Definition at line 160 of file qgsterrainprovider.cpp.

◆ layer()

QgsRasterLayer * QgsRasterDemTerrainProvider::layer ( ) const

Returns the raster layer with elevation model to be used as the terrain source.

See also: layer()

Definition at line 213 of file qgsterrainprovider.cpp.

◆ operator=()

const QgsRasterDemTerrainProvider * QgsRasterDemTerrainProvider::operator= ( const QgsRasterDemTerrainProvider & other )

delete

◆ prepare()

void QgsRasterDemTerrainProvider::prepare ( )

overridevirtual

Called on the main thread prior to accessing the provider from a background thread.

Subclasses must implement suitable logic in order to prepare for thread-safe calculation of terrain heights on background threads.

Implements QgsAbstractTerrainProvider.

Definition at line 200 of file qgsterrainprovider.cpp.

◆ readXml()

bool QgsRasterDemTerrainProvider::readXml	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

overridevirtual

Reads the terrain provider state from a DOM element.

See also: writeXml()

Implements QgsAbstractTerrainProvider.

Definition at line 123 of file qgsterrainprovider.cpp.

◆ resolveReferences()

void QgsRasterDemTerrainProvider::resolveReferences ( const QgsProject * project )

overridevirtual

Resolves reference to layers from stored layer ID (if it has not been resolved already)

Reimplemented from QgsAbstractTerrainProvider.

Definition at line 115 of file qgsterrainprovider.cpp.

◆ setLayer()

void QgsRasterDemTerrainProvider::setLayer ( QgsRasterLayer * layer )

Sets the raster layer with elevation model to be used as the terrain source.

See also: layer()

Definition at line 208 of file qgsterrainprovider.cpp.

◆ type()

QString QgsRasterDemTerrainProvider::type ( ) const

overridevirtual

Returns the unique type ID string for the provider.

Implements QgsAbstractTerrainProvider.

Definition at line 110 of file qgsterrainprovider.cpp.

◆ writeXml()

QDomElement QgsRasterDemTerrainProvider::writeXml	(	QDomDocument &	document,
		const QgsReadWriteContext &	context
	)		const

overridevirtual

Returns a DOM element representing the state of the terrain provider.

See also: readXml()

Implements QgsAbstractTerrainProvider.

Definition at line 139 of file qgsterrainprovider.cpp.

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

/build/qgis-3.40.0+99sid/src/core/elevation/qgsterrainprovider.h
/build/qgis-3.40.0+99sid/src/core/elevation/qgsterrainprovider.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsRasterDemTerrainProvider()

Member Function Documentation

◆ clone()

◆ crs()

◆ equals()

◆ heightAt()

◆ layer()

◆ operator=()

◆ prepare()

◆ readXml()

◆ resolveReferences()

◆ setLayer()

◆ type()

◆ writeXml()