34 return QStringLiteral(
"ramp" );
39 std::unique_ptr< QgsPointCloudAttributeByRampRenderer > res = std::make_unique< QgsPointCloudAttributeByRampRenderer >();
40 res->mAttribute = mAttribute;
41 res->mColorRampShader = mColorRampShader;
57 visibleExtent.
grow( std::max( visibleExtent.
width(), visibleExtent.
height() ) * 0.05 );
60 const char *ptr = block->
data();
65 int attributeOffset = 0;
73 const bool considerZ = !zRange.
isInfinite() || renderElevation;
75 const bool applyZOffset =
attribute->name() == QLatin1String(
"Z" );
76 const bool applyXOffset =
attribute->name() == QLatin1String(
"X" );
77 const bool applyYOffset =
attribute->name() == QLatin1String(
"Y" );
84 const bool reproject = ct.
isValid();
90 for (
int i = 0; i < count; ++i )
100 z =
pointZ( context, ptr, i );
105 pointXY( context, ptr, i, x, y );
106 if ( visibleExtent.
contains( x, y ) )
120 double attributeValue = 0;
121 context.
getAttribute( ptr, i * recordSize + attributeOffset, attributeType, attributeValue );
124 attributeValue = context.
offset().
x() + context.
scale().
x() * attributeValue;
126 attributeValue = context.
offset().
y() + context.
scale().
y() * attributeValue;
130 mColorRampShader.
shade( attributeValue, &red, &green, &blue, &alpha );
141 drawPoint( x, y, QColor( red, green, blue, alpha ), context );
142 if ( renderElevation )
154 std::unique_ptr< QgsPointCloudAttributeByRampRenderer > r = std::make_unique< QgsPointCloudAttributeByRampRenderer >();
156 r->setAttribute( element.attribute( QStringLiteral(
"attribute" ), QStringLiteral(
"Intensity" ) ) );
158 QDomElement elemShader = element.firstChildElement( QStringLiteral(
"colorrampshader" ) );
159 r->mColorRampShader.readXml( elemShader, context );
161 r->setMinimum( element.attribute( QStringLiteral(
"min" ), QStringLiteral(
"0" ) ).toDouble() );
162 r->setMaximum( element.attribute( QStringLiteral(
"max" ), QStringLiteral(
"100" ) ).toDouble() );
164 r->restoreCommonProperties( element, context );
171 QDomElement rendererElem = doc.createElement( QStringLiteral(
"renderer" ) );
173 rendererElem.setAttribute( QStringLiteral(
"type" ), QStringLiteral(
"ramp" ) );
174 rendererElem.setAttribute( QStringLiteral(
"min" ), mMin );
175 rendererElem.setAttribute( QStringLiteral(
"max" ), mMax );
177 rendererElem.setAttribute( QStringLiteral(
"attribute" ), mAttribute );
179 QDomElement elemShader = mColorRampShader.
writeXml( doc, context );
180 rendererElem.appendChild( elemShader );
196 QList<QgsLayerTreeModelLegendNode *> res;
217 QList< QPair< QString, QColor > > items;
219 res.reserve( items.size() );
220 for (
const QPair< QString, QColor > &item : std::as_const( items ) )
242 return mColorRampShader;
247 mColorRampShader = shader;
272 std::unique_ptr< QgsPointCloudAttributeByRampRendererPreparedData> data = std::make_unique< QgsPointCloudAttributeByRampRendererPreparedData >();
273 data->attributeName = mAttribute;
274 data->colorRampShader = mColorRampShader;
276 data->attributeIsX = mAttribute == QLatin1String(
"X" );
277 data->attributeIsY = mAttribute == QLatin1String(
"Y" );
278 data->attributeIsZ = mAttribute == QLatin1String(
"Z" );
284 double attributeValue = 0;
291 attributeValue = block->
offset().
x() + block->
scale().
x() * attributeValue;
293 attributeValue = block->
offset().
y() + block->
scale().
y() * attributeValue;
300 return QColor( red, green, blue, alpha );
@ Exact
Assigns the color of the exact matching value in the color ramp item list.
@ Linear
Interpolates the color between two class breaks linearly.
@ Discrete
Assigns the color of the higher class for every pixel between two class breaks.
Settings for a color ramp legend node.
bool useContinuousLegend() const
Returns true if a continuous gradient legend will be used.
A legend node which renders a color ramp.
A ramp shader will color a raster pixel based on a list of values ranges in a ramp.
void legendSymbologyItems(QList< QPair< QString, QColor > > &symbolItems) const override
Returns legend symbology items if provided by renderer.
Qgis::ShaderInterpolationMethod colorRampType() const
Returns the color ramp interpolation method.
const QgsColorRampLegendNodeSettings * legendSettings() const
Returns the color ramp shader legend settings.
void setSourceColorRamp(QgsColorRamp *colorramp)
Set the source color ramp.
QDomElement writeXml(QDomDocument &doc, const QgsReadWriteContext &context=QgsReadWriteContext()) const
Writes configuration to a new DOM element.
bool shade(double value, int *returnRedValue, int *returnGreenValue, int *returnBlueValue, int *returnAlphaValue) const override
Generates an new RGBA value based on one input value.
QgsColorRamp * sourceColorRamp() const
Returns the source color ramp.
void classifyColorRamp(int classes=0, int band=-1, const QgsRectangle &extent=QgsRectangle(), QgsRasterInterface *input=nullptr)
Classify color ramp shader.
virtual QgsColorRamp * clone() const =0
Creates a clone of the color ramp.
Custom exception class for Coordinate Reference System related exceptions.
QgsRange which stores a range of double values.
bool isInfinite() const
Returns true if the range consists of all possible values.
Layer tree node points to a map layer.
QColor pointColor(const QgsPointCloudBlock *block, int i, double z) override
An optimised method of retrieving the color of a point from a point cloud block.
bool prepareBlock(const QgsPointCloudBlock *block) override
Prepares the renderer for using the specified block.
QSet< QString > usedAttributes() const override
Returns the set of attributes used by the prepared point cloud renderer.
QgsColorRampShader colorRampShader
QgsPointCloudAttribute::DataType attributeType
QString type() const override
Returns the identifier of the renderer type.
void setMaximum(double maximum)
Sets the maximum value for attributes which will be used by the color ramp shader.
QgsPointCloudRenderer * clone() const override
Create a deep copy of this renderer.
static QgsPointCloudRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates an RGB renderer from an XML element.
void renderBlock(const QgsPointCloudBlock *block, QgsPointCloudRenderContext &context) override
Renders a block of point cloud data using the specified render context.
void setMinimum(double minimum)
Sets the minimum value for attributes which will be used by the color ramp shader.
QgsPointCloudAttributeByRampRenderer()
Constructor for QgsPointCloudAttributeByRampRenderer.
QDomElement save(QDomDocument &doc, const QgsReadWriteContext &context) const override
Saves the renderer configuration to an XML element.
double maximum() const
Returns the maximum value for attributes which will be used by the color ramp shader.
QList< QgsLayerTreeModelLegendNode * > createLegendNodes(QgsLayerTreeLayer *nodeLayer) override
Creates a set of legend nodes representing the renderer.
void setColorRampShader(const QgsColorRampShader &shader)
Sets the color ramp shader function used to visualize the attribute.
QSet< QString > usedAttributes(const QgsPointCloudRenderContext &context) const override
Returns a list of attributes required by this renderer.
std::unique_ptr< QgsPreparedPointCloudRendererData > prepare() override
Returns prepared data container for bulk point color retrieval.
QgsColorRampShader colorRampShader() const
Returns the color ramp shader function used to visualize the attribute.
double minimum() const
Returns the minimum value for attributes which will be used by the color ramp shader.
QString attribute() const
Returns the attribute to use for the renderer.
void setAttribute(const QString &attribute)
Sets the attribute to use for the renderer.
Collection of point cloud attributes.
int pointRecordSize() const
Returns total size of record.
const QgsPointCloudAttribute * find(const QString &attributeName, int &offset) const
Finds the attribute with the name.
Attribute for point cloud data pair of name and size in bytes.
DataType
Systems of unit measurement.
DataType type() const
Returns the data type.
Base class for storing raw data from point cloud nodes.
QgsVector3D scale() const
Returns the custom scale of the block.
const char * data() const
Returns raw pointer to data.
QgsPointCloudAttributeCollection attributes() const
Returns the attributes that are stored in the data block, along with their size.
int pointCount() const
Returns number of points that are stored in the block.
int pointRecordSize() const
Returns the total size of each individual point record.
QgsVector3D offset() const
Returns the custom offset of the block.
Encapsulates the render context for a 2D point cloud rendering operation.
double zValueFixedOffset() const
Returns any constant offset which must be applied to z values taken from the point cloud index.
QgsVector3D offset() const
Returns the offset of the layer's int32 coordinates compared to CRS coords.
QgsRenderContext & renderContext()
Returns a reference to the context's render context.
void incrementPointsRendered(long count)
Increments the count of points rendered by the specified amount.
static void getAttribute(const char *data, std::size_t offset, QgsPointCloudAttribute::DataType type, T &value)
Retrieves the attribute value from data at the specified offset, where type indicates the original da...
double zValueScale() const
Returns any constant scaling factor which must be applied to z values taken from the point cloud inde...
QgsVector3D scale() const
Returns the scale of the layer's int32 coordinates compared to CRS coords.
Abstract base class for 2d point cloud renderers.
bool renderAsTriangles() const
Returns whether points are triangulated to render solid surface.
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...
void saveCommonProperties(QDomElement &element, const QgsReadWriteContext &context) const
Saves common renderer properties (such as point size and screen error) to the specified DOM element.
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 rendere...
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).
static double pointZ(QgsPointCloudRenderContext &context, const char *ptr, int i)
Retrieves the z value for the point at index i.
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.
bool contains(const QgsRange< T > &other) const
Returns true if this range contains another range.
double maximumValue() const
Returns the minimum value for the raster shader.
double minimumValue() const
Returns the maximum value for the raster shader.
Implementation of legend node interface for displaying raster legend entries.
The class is used as a container of context for various read/write operations on other objects.
A rectangle specified with double values.
bool contains(const QgsRectangle &rect) const
Returns true when rectangle contains other rectangle.
double width() const
Returns the width of the rectangle.
void grow(double delta)
Grows the rectangle in place by the specified amount.
double height() const
Returns the height of the rectangle.
QgsElevationMap * elevationMap() const
Returns the destination elevation map for the render operation.
const QgsRectangle & extent() const
When rendering a map layer, calling this method returns the "clipping" extent for the layer (in the l...
QgsDoubleRange zRange() const
Returns the range of z-values which should be rendered.
bool renderingStopped() const
Returns true if the rendering operation has been stopped and any ongoing rendering should be canceled...
QPainter * previewRenderPainter()
Returns the const destination QPainter for temporary in-progress preview renders.
QgsCoordinateTransform coordinateTransform() const
Returns the current coordinate transform for the context.
Implementation of legend node interface for displaying arbitrary label with icon.
static QgsStyle * defaultStyle(bool initialize=true)
Returns the default application-wide style.
double y() const
Returns Y coordinate.
double z() const
Returns Z coordinate.
double x() const
Returns X coordinate.