An RGB renderer for 2d visualisation of point clouds using embedded red, green and blue attributes. More...

#include <qgspointcloudattributebyramprenderer.h>

Inheritance diagram for QgsPointCloudAttributeByRampRenderer:

Public Member Functions
	QgsPointCloudAttributeByRampRenderer ()
	Constructor for QgsPointCloudAttributeByRampRenderer.

QString	attribute () const
	Returns the attribute to use for the renderer.

QgsPointCloudRenderer *	clone () const override
	Create a deep copy of this renderer.

QgsColorRampShader	colorRampShader () const
	Returns the color ramp shader function used to visualize the attribute.

QList< QgsLayerTreeModelLegendNode * >	createLegendNodes (QgsLayerTreeLayer *nodeLayer) override
	Creates a set of legend nodes representing the renderer.

double	maximum () const
	Returns the maximum value for attributes which will be used by the color ramp shader.

double	minimum () const
	Returns the minimum value for attributes which will be used by the color ramp shader.

std::unique_ptr< QgsPreparedPointCloudRendererData >	prepare () override
	Returns prepared data container for bulk point color retrieval.

void	renderBlock (const QgsPointCloudBlock *block, QgsPointCloudRenderContext &context) override
	Renders a block of point cloud data using the specified render context.

QDomElement	save (QDomDocument &doc, const QgsReadWriteContext &context) const override
	Saves the renderer configuration to an XML element.

void	setAttribute (const QString &attribute)
	Sets the attribute to use for the renderer.

void	setColorRampShader (const QgsColorRampShader &shader)
	Sets the color ramp shader function used to visualize the attribute.

void	setMaximum (double maximum)
	Sets the maximum value for attributes which will be used by the color ramp shader.

void	setMinimum (double minimum)
	Sets the minimum value for attributes which will be used by the color ramp shader.

QString	type () const override
	Returns the identifier of the renderer type.

QSet< QString >	usedAttributes (const QgsPointCloudRenderContext &context) const override
	Returns a list of attributes required by this renderer.

Public Member Functions inherited from QgsPointCloudRenderer
	QgsPointCloudRenderer ()=default

	QgsPointCloudRenderer (const QgsPointCloudRenderer &other)=delete
	QgsPointCloudRenderer cannot be copied – use clone() instead.

virtual	~QgsPointCloudRenderer ()=default

virtual void	checkLegendItem (const QString &key, bool state=true)
	Called when the check state of the legend item with the specified key is changed.

Qgis::PointCloudDrawOrder	drawOrder2d () const
	Returns the drawing order used by the renderer for drawing points.

bool	horizontalTriangleFilter () const
	Returns whether large triangles will get rendered.

double	horizontalTriangleFilterThreshold () const
	Returns threshold for filtering of triangles.

Qgis::RenderUnit	horizontalTriangleFilterUnit () const
	Returns units of the threshold for filtering of triangles.

QVector< QVariantMap >	identify (QgsPointCloudLayer *layer, const QgsRenderContext &context, const QgsGeometry &geometry, double toleranceForPointIdentification=0)
	Returns the list of visible points of the point cloud layer layer and an extent defined by a geometry in the 2D plane geometry.

virtual bool	legendItemChecked (const QString &key)
	Returns `true` if the legend item with the specified key is checked.

virtual QStringList	legendRuleKeys () const
	Returns a list of all rule keys for legend nodes created by the renderer.

double	maximumScreenError () const
	Returns the maximum screen error allowed when rendering the point cloud.

Qgis::RenderUnit	maximumScreenErrorUnit () const
	Returns the unit for the maximum screen error allowed when rendering the point cloud.

QgsPointCloudRenderer &	operator= (const QgsPointCloudRenderer &other)=delete
	QgsPointCloudRenderer cannot be copied – use clone() instead.

double	pointSize () const
	Returns the point size.

const QgsMapUnitScale &	pointSizeMapUnitScale () const
	Returns the map unit scale used for the point size.

Qgis::RenderUnit	pointSizeUnit () const
	Returns the units used for the point size.

Qgis::PointCloudSymbol	pointSymbol () const
	Returns the symbol used by the renderer for drawing points.

bool	renderAsTriangles () const
	Returns whether points are triangulated to render solid surface.

void	setDrawOrder2d (Qgis::PointCloudDrawOrder order)
	Sets the drawing order used by the renderer for drawing points.

void	setHorizontalTriangleFilter (bool enabled)
	Sets whether large triangles will get rendered.

void	setHorizontalTriangleFilterThreshold (double threshold)
	Sets threshold for filtering of triangles.

void	setHorizontalTriangleFilterUnit (Qgis::RenderUnit unit)
	Sets units of the threshold for filtering of triangles.

void	setMaximumScreenError (double error)
	Sets the maximum screen error allowed when rendering the point cloud.

void	setMaximumScreenErrorUnit (Qgis::RenderUnit unit)
	Sets the unit for the maximum screen error allowed when rendering the point cloud.

void	setPointSize (double size)
	Sets the point size.

void	setPointSizeMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale used for the point size.

void	setPointSizeUnit (const Qgis::RenderUnit units)
	Sets the units used for the point size.

void	setPointSymbol (Qgis::PointCloudSymbol symbol)
	Sets the symbol used by the renderer for drawing points.

void	setRenderAsTriangles (bool asTriangles)
	Sets whether points are triangulated to render solid surface.

virtual void	startRender (QgsPointCloudRenderContext &context)
	Must be called when a new render cycle is started.

virtual void	stopRender (QgsPointCloudRenderContext &context)
	Must be called when a render cycle has finished, to allow the renderer to clean up.

virtual bool	willRenderPoint (const QMap< QString, QVariant > &pointAttributes)
	Checks whether the point holding pointAttributes attributes will be rendered By default if not overridden in the subclass renderer will return true ( the renderer is responsible for the filtering behavior )

Static Public Member Functions
static QgsPointCloudRenderer *	create (QDomElement &element, const QgsReadWriteContext &context)
	Creates an RGB renderer from an XML element.

Static Public Member Functions inherited from QgsPointCloudRenderer
static QgsPointCloudRenderer *	load (QDomElement &element, const QgsReadWriteContext &context)
	Creates a renderer from an XML element.

Additional Inherited Members
Protected Member Functions inherited from QgsPointCloudRenderer
void	addPointToTriangulation (double x, double y, double z, const QColor &color, QgsPointCloudRenderContext &context)
	Adds a point to the list of points to be triangulated (only used when renderAsTriangles() is enabled)

void	copyCommonProperties (QgsPointCloudRenderer *destination) const
	Copies common point cloud properties (such as point size and screen error) to the destination renderer.

void	drawPoint (double x, double y, const QColor &color, int width, QgsPointCloudRenderContext &context) const
	Draws a point using a color and painter width at the specified x and y (in map coordinates).

void	drawPoint (double x, double y, const QColor &color, QgsPointCloudRenderContext &context) const
	Draws a point using a color at the specified x and y (in map coordinates).

void	drawPointToElevationMap (double x, double y, double z, int width, QgsPointCloudRenderContext &context) const
	Draws a point at the elevation z using at the specified x and y (in map coordinates) and painter width on the elevation map.

void	drawPointToElevationMap (double x, double y, double z, QgsPointCloudRenderContext &context) const
	Draws a point at the elevation z using at the specified x and y (in map coordinates) on the elevation map.

void	restoreCommonProperties (const QDomElement &element, const QgsReadWriteContext &context)
	Restores common renderer properties (such as point size and screen error) from the specified DOM element.

void	saveCommonProperties (QDomElement &element, const QgsReadWriteContext &context) const
	Saves common renderer properties (such as point size and screen error) to the specified DOM element.

Static Protected Member Functions inherited from QgsPointCloudRenderer
static void	pointXY (QgsPointCloudRenderContext &context, const char *ptr, int i, double &x, double &y)
	Retrieves the x and y coordinate for the point at index i.

static double	pointZ (QgsPointCloudRenderContext &context, const char *ptr, int i)
	Retrieves the z value for the point at index i.

Detailed Description

An RGB renderer for 2d visualisation of point clouds using embedded red, green and blue attributes.

Since: QGIS 3.18

Definition at line 61 of file qgspointcloudattributebyramprenderer.h.

Constructor & Destructor Documentation

◆ QgsPointCloudAttributeByRampRenderer()

QgsPointCloudAttributeByRampRenderer::QgsPointCloudAttributeByRampRenderer ( )

Constructor for QgsPointCloudAttributeByRampRenderer.

Definition at line 26 of file qgspointcloudattributebyramprenderer.cpp.

Member Function Documentation

◆ attribute()

QString QgsPointCloudAttributeByRampRenderer::attribute ( ) const

Returns the attribute to use for the renderer.

See also: setAttribute()

Definition at line 230 of file qgspointcloudattributebyramprenderer.cpp.

◆ clone()

QgsPointCloudRenderer * QgsPointCloudAttributeByRampRenderer::clone ( ) const

overridevirtual

Create a deep copy of this renderer.

Should be implemented by all subclasses and generate a proper subclass.

Implements QgsPointCloudRenderer.

Definition at line 37 of file qgspointcloudattributebyramprenderer.cpp.

◆ colorRampShader()

QgsColorRampShader QgsPointCloudAttributeByRampRenderer::colorRampShader ( ) const

Returns the color ramp shader function used to visualize the attribute.

See also: setColorRampShader()

Definition at line 240 of file qgspointcloudattributebyramprenderer.cpp.

◆ create()

QgsPointCloudRenderer * QgsPointCloudAttributeByRampRenderer::create	(	QDomElement &	element,
		const QgsReadWriteContext &	context
	)

static

Creates an RGB renderer from an XML element.

Definition at line 152 of file qgspointcloudattributebyramprenderer.cpp.

◆ createLegendNodes()

QList< QgsLayerTreeModelLegendNode * > QgsPointCloudAttributeByRampRenderer::createLegendNodes ( QgsLayerTreeLayer * nodeLayer )

overridevirtual

Creates a set of legend nodes representing the renderer.

Reimplemented from QgsPointCloudRenderer.

Definition at line 194 of file qgspointcloudattributebyramprenderer.cpp.

◆ maximum()

double QgsPointCloudAttributeByRampRenderer::maximum ( ) const

Returns the maximum value for attributes which will be used by the color ramp shader.

See also: setMaximum(); minimum()

Definition at line 260 of file qgspointcloudattributebyramprenderer.cpp.

◆ minimum()

double QgsPointCloudAttributeByRampRenderer::minimum ( ) const

Returns the minimum value for attributes which will be used by the color ramp shader.

See also: setMinimum(); maximum()

Definition at line 250 of file qgspointcloudattributebyramprenderer.cpp.

◆ prepare()

std::unique_ptr< QgsPreparedPointCloudRendererData > QgsPointCloudAttributeByRampRenderer::prepare ( )

overridevirtual

Returns prepared data container for bulk point color retrieval.

Note: Not available in Python bindings.

Since: QGIS 3.26

Reimplemented from QgsPointCloudRenderer.

Definition at line 270 of file qgspointcloudattributebyramprenderer.cpp.

◆ renderBlock()

void QgsPointCloudAttributeByRampRenderer::renderBlock	(	const QgsPointCloudBlock *	block,
		QgsPointCloudRenderContext &	context
	)

overridevirtual

Renders a block of point cloud data using the specified render context.

Implements QgsPointCloudRenderer.

Definition at line 50 of file qgspointcloudattributebyramprenderer.cpp.

◆ save()

QDomElement QgsPointCloudAttributeByRampRenderer::save	(	QDomDocument &	doc,
		const QgsReadWriteContext &	context
	)		const

overridevirtual

Saves the renderer configuration to an XML element.

See also: load()

Implements QgsPointCloudRenderer.

Definition at line 169 of file qgspointcloudattributebyramprenderer.cpp.

◆ setAttribute()

void QgsPointCloudAttributeByRampRenderer::setAttribute ( const QString & attribute )

Sets the attribute to use for the renderer.

See also: attribute()

Definition at line 235 of file qgspointcloudattributebyramprenderer.cpp.

◆ setColorRampShader()

void QgsPointCloudAttributeByRampRenderer::setColorRampShader ( const QgsColorRampShader & shader )

Sets the color ramp shader function used to visualize the attribute.

See also: colorRampShader()

Definition at line 245 of file qgspointcloudattributebyramprenderer.cpp.

◆ setMaximum()

void QgsPointCloudAttributeByRampRenderer::setMaximum ( double maximum )

Sets the maximum value for attributes which will be used by the color ramp shader.

See also: maximum(); setMinimum()

Definition at line 265 of file qgspointcloudattributebyramprenderer.cpp.

◆ setMinimum()

void QgsPointCloudAttributeByRampRenderer::setMinimum ( double minimum )

Sets the minimum value for attributes which will be used by the color ramp shader.

See also: minimum(); setMaximum()

Definition at line 255 of file qgspointcloudattributebyramprenderer.cpp.

◆ type()

QString QgsPointCloudAttributeByRampRenderer::type ( ) const

overridevirtual

Returns the identifier of the renderer type.

Implements QgsPointCloudRenderer.

Definition at line 32 of file qgspointcloudattributebyramprenderer.cpp.

◆ usedAttributes()

QSet< QString > QgsPointCloudAttributeByRampRenderer::usedAttributes ( const QgsPointCloudRenderContext & context ) const

overridevirtual

Returns a list of attributes required by this renderer.

Attributes not listed in here may not be requested from the provider at rendering time.

Note: the "X" and "Y" attributes will always be fetched and do not need to be explicitly returned here.

Reimplemented from QgsPointCloudRenderer.

Definition at line 187 of file qgspointcloudattributebyramprenderer.cpp.

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

/build/qgis-3.40.0+99sid/src/core/pointcloud/qgspointcloudattributebyramprenderer.h
/build/qgis-3.40.0+99sid/src/core/pointcloud/qgspointcloudattributebyramprenderer.cpp

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsPointCloudAttributeByRampRenderer()

Member Function Documentation

◆ attribute()

◆ clone()

◆ colorRampShader()

◆ create()

◆ createLegendNodes()

◆ maximum()

◆ minimum()

◆ prepare()

◆ renderBlock()

◆ save()

◆ setAttribute()

◆ setColorRampShader()

◆ setMaximum()

◆ setMinimum()

◆ type()

◆ usedAttributes()