QgsMeshUtils Namespace Reference

Functions
CORE_EXPORT QgsRasterBlock *	exportRasterBlock (const QgsMeshLayer &layer, const QgsMeshDatasetIndex &datasetIndex, const QgsCoordinateReferenceSystem &destinationCrs, const QgsCoordinateTransformContext &transformContext, double mapUnitsPerPixel, const QgsRectangle &extent, QgsRasterBlockFeedback *feedback=nullptr)
	Exports mesh layer's dataset values as raster block.
CORE_EXPORT QgsRasterBlock *	exportRasterBlock (const QgsTriangularMesh &triangularMesh, const QgsMeshDataBlock &datasetValues, const QgsMeshDataBlock &activeFlags, const QgsMeshDatasetGroupMetadata::DataType dataType, const QgsCoordinateTransform &transform, double mapUnitsPerPixel, const QgsRectangle &extent, QgsRasterBlockFeedback *feedback=nullptr)
	Exports mesh layer's dataset values as raster block.

Function Documentation

exportRasterBlock() [1/2]

QgsRasterBlock * QgsMeshUtils::exportRasterBlock	(	const QgsMeshLayer &	layer,
		const QgsMeshDatasetIndex &	datasetIndex,
		const QgsCoordinateReferenceSystem &	destinationCrs,
		const QgsCoordinateTransformContext &	transformContext,
		double	mapUnitsPerPixel,
		const QgsRectangle &	extent,
		QgsRasterBlockFeedback *	feedback = nullptr
	)

Exports mesh layer's dataset values as raster block.

The function always fetches native mesh and dataset data from data provider and calculates triangular mesh

Parameters

layer	mesh layer
datasetIndex	index from layer defining group and dataset (time) to export
destinationCrs	destination/map CRS. Used to create triangular mesh from native mesh
transformContext	Transform context to transform layer CRS to destination CRS
mapUnitsPerPixel	map units per pixel for block
extent	extent of block in destination CRS
feedback	optional raster feedback object for cancellation/preview

Returns

raster block with Float::64 values. nullptr on error

Since

QGIS 3.6

Definition at line 213 of file qgsmeshlayerinterpolator.cpp.

exportRasterBlock() [2/2]

QgsRasterBlock * QgsMeshUtils::exportRasterBlock	(	const QgsTriangularMesh &	triangularMesh,
		const QgsMeshDataBlock &	datasetValues,
		const QgsMeshDataBlock &	activeFlags,
		const QgsMeshDatasetGroupMetadata::DataType	dataType,
		const QgsCoordinateTransform &	transform,
		double	mapUnitsPerPixel,
		const QgsRectangle &	extent,
		QgsRasterBlockFeedback *	feedback = nullptr
	)

Exports mesh layer's dataset values as raster block.

Parameters

triangularMesh	the triangular mesh of the mesh layer
datasetValues	dataset values used to build the raster block
activeFlags	active flag values
dataType	the data type iof the dataset values
transform	the coordinate transform used to export the raster block
mapUnitsPerPixel	map units per pixel for block
extent	extent of block in destination CRS
feedback	optional raster feedback object for cancellation/preview

Returns

raster block with Float::64 values. nullptr on error

Since

QGIS 3.18

Definition at line 279 of file qgsmeshlayerinterpolator.cpp.