This class can render elevation shading on an image with different methods (eye dome lighting, hillshading, ...). More...

#include <qgselevationshadingrenderer.h>

Public Member Functions
	QgsElevationShadingRenderer ()

Qgis::ElevationMapCombineMethod	combinedElevationMethod () const
	Returns the method used when conbining different elevation sources. More...

double	eyeDomeLightingDistance () const
	Returns the distance of the eye dome lighting method, that is the distance where the effect is apply from the source elevation. More...

Qgis::RenderUnit	eyeDomeLightingDistanceUnit () const
	Returns the unit of the distance of the eye dome lighting method returned by eyeDomeLightingDistance(). More...

double	eyeDomeLightingStrength () const
	Returns the strength of the eye dome lighting method. More...

double	hillshadingZFactor () const
	Returns the z factor used by the hill shading method. More...

bool	isActive () const
	Returns whether this shading renderer is active. More...

bool	isActiveEyeDomeLighting () const
	Returns whether eye-dome lighting shading method is active. More...

bool	isActiveHillshading () const
	Returns whether the hillshading is active. More...

bool	isHillshadingMultidirectional () const
	Returns whether the hill shading method is multidirectional. More...

double	lightAltitude () const
	Returns the altitude of the light (degree) that can be used by some methods (e.g. More...

double	lightAzimuth () const
	Returns the azimuth of the light (degree) that can be used by some methods (e.g. More...

void	readXml (const QDomElement &element, const QgsReadWriteContext &context)
	Reads configuration from a DOM element. More...

void	renderShading (const QgsElevationMap &elevation, QImage &image, const QgsRenderContext &context) const
	Render shading on image condidering the elevation map elevation and the renderer context context If elevation map and the image don't have same sizes, nothing happens. More...

void	setActive (bool active)
	Sets whether this shading renderer is active. More...

void	setActiveEyeDomeLighting (bool active)
	Sets active the eye-dome lighting shading method. More...

void	setActiveHillshading (bool active)
	Sets active the hillshading. More...

void	setCombinedElevationMethod (Qgis::ElevationMapCombineMethod method)
	Sets the method used when conbining different elevation sources. More...

void	setEyeDomeLightingDistance (double distance)
	Sets the distance of the eye dome lighting method, that is the distance where the effect is apply from the source elevation. More...

void	setEyeDomeLightingDistanceUnit (Qgis::RenderUnit unit)
	Sets the unit of the distance of the eye dome lighting method set by setEyeDomeLightingDistance(). More...

void	setEyeDomeLightingStrength (double strength)
	Sets the strength of the eye dome lighting method. More...

void	setHillshadingMultidirectional (bool multiDirectional)
	Sets whether the hill shading method is multidirectional. More...

void	setHillshadingZFactor (double zFactor)
	Sets the z factor used by the hill shading method. More...

void	setLightAltitude (double lightAltitude)
	Sets the altitude of the light (degree) that can be used by some methods (e.g. More...

void	setLightAzimuth (double lightAzimuth)
	Sets the azimuth of the light (degree) that can be used by some methods (e.g. More...

void	writeXml (QDomElement &elem, const QgsReadWriteContext &context) const
	Writes configuration on a DOM element. More...

Detailed Description

This class can render elevation shading on an image with different methods (eye dome lighting, hillshading, ...).

An instance of this class supports the following settings:

activate/deactivate elevation shading
activate/deactivate a particular shading method
parameters of each shading method

To render shading on image the caller call renderShading() with the image and an elevation map (see QgsElevationMap()) as parameters. The shading is applied on the image in place. Elevation map and image must have same sizes.

Since: QGIS 3.30

Definition at line 47 of file qgselevationshadingrenderer.h.

Constructor & Destructor Documentation

◆ QgsElevationShadingRenderer()

QgsElevationShadingRenderer::QgsElevationShadingRenderer ( )

Definition at line 24 of file qgselevationshadingrenderer.cpp.

Member Function Documentation

◆ combinedElevationMethod()

Qgis::ElevationMapCombineMethod QgsElevationShadingRenderer::combinedElevationMethod ( ) const

Returns the method used when conbining different elevation sources.

See also: setCombinedElevationMethod()

Definition at line 165 of file qgselevationshadingrenderer.cpp.

◆ eyeDomeLightingDistance()

double QgsElevationShadingRenderer::eyeDomeLightingDistance ( ) const

Returns the distance of the eye dome lighting method, that is the distance where the effect is apply from the source elevation.

See also: setEyeDomeLightingDistance()

Definition at line 185 of file qgselevationshadingrenderer.cpp.

◆ eyeDomeLightingDistanceUnit()

Qgis::RenderUnit QgsElevationShadingRenderer::eyeDomeLightingDistanceUnit ( ) const

Returns the unit of the distance of the eye dome lighting method returned by eyeDomeLightingDistance().

See also: setEyeDomeLightingDistanceUnit()

Definition at line 175 of file qgselevationshadingrenderer.cpp.

◆ eyeDomeLightingStrength()

double QgsElevationShadingRenderer::eyeDomeLightingStrength ( ) const

Returns the strength of the eye dome lighting method.

See also: setEyeDomeLightingStrength()

Definition at line 195 of file qgselevationshadingrenderer.cpp.

◆ hillshadingZFactor()

double QgsElevationShadingRenderer::hillshadingZFactor ( ) const

Returns the z factor used by the hill shading method.

See also: setHillshadingZFactor()

Definition at line 70 of file qgselevationshadingrenderer.cpp.

◆ isActive()

bool QgsElevationShadingRenderer::isActive ( ) const

Returns whether this shading renderer is active.

Definition at line 45 of file qgselevationshadingrenderer.cpp.

◆ isActiveEyeDomeLighting()

bool QgsElevationShadingRenderer::isActiveEyeDomeLighting ( ) const

Returns whether eye-dome lighting shading method is active.

Definition at line 55 of file qgselevationshadingrenderer.cpp.

◆ isActiveHillshading()

bool QgsElevationShadingRenderer::isActiveHillshading ( ) const

Returns whether the hillshading is active.

Definition at line 65 of file qgselevationshadingrenderer.cpp.

◆ isHillshadingMultidirectional()

bool QgsElevationShadingRenderer::isHillshadingMultidirectional ( ) const

Returns whether the hill shading method is multidirectional.

See also: setHillshadingMultidirectional()

Definition at line 80 of file qgselevationshadingrenderer.cpp.

◆ lightAltitude()

double QgsElevationShadingRenderer::lightAltitude ( ) const

Returns the altitude of the light (degree) that can be used by some methods (e.g.

hill shading).

See also: setLightAltitude()

Definition at line 90 of file qgselevationshadingrenderer.cpp.

◆ lightAzimuth()

double QgsElevationShadingRenderer::lightAzimuth ( ) const

Returns the azimuth of the light (degree) that can be used by some methods (e.g.

hill shading).

See also: setLightAltitude()

Definition at line 100 of file qgselevationshadingrenderer.cpp.

◆ readXml()

void QgsElevationShadingRenderer::readXml	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

Reads configuration from a DOM element.

Definition at line 129 of file qgselevationshadingrenderer.cpp.

◆ renderShading()

void QgsElevationShadingRenderer::renderShading	(	const QgsElevationMap &	elevation,
		QImage &	image,
		const QgsRenderContext &	context
	)		const

Render shading on image condidering the elevation map elevation and the renderer context context If elevation map and the image don't have same sizes, nothing happens.

Definition at line 28 of file qgselevationshadingrenderer.cpp.