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. More...
CORE_EXPORT QList< int >	nativeFacesFromTriangles (const QList< int > &triangleIndexes, const QVector< int > &trianglesToNativeFaces)
	Returns unique native faces indexes from list of triangle indexes. More...
CORE_EXPORT QgsGeometry	toGeometry (const QgsMeshFace &face, const QVector< QgsMeshVertex > &vertices)
	Returns face as polygon geometry. More...
CORE_EXPORT std::unique_ptr< QgsPolygon >	toPolygon (const QgsMeshFace &face, const QVector< QgsMeshVertex > &vertices)
	Returns face as polygon geometry, caller is responsible for delete. More...

Function Documentation

exportRasterBlock()

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 154 of file qgsmeshlayerinterpolator.cpp.

nativeFacesFromTriangles()

QList< int > QgsMeshUtils::nativeFacesFromTriangles	(	const QList< int > &	triangleIndexes,
		const QVector< int > &	trianglesToNativeFaces
	)

Returns unique native faces indexes from list of triangle indexes.

Since

QGIS 3.4

Definition at line 233 of file qgstriangularmesh.cpp.

toGeometry()

QgsGeometry QgsMeshUtils::toGeometry	(	const QgsMeshFace &	face,
		const QVector< QgsMeshVertex > &	vertices
	)

Returns face as polygon geometry.

Definition at line 228 of file qgstriangularmesh.cpp.

toPolygon()

std::unique_ptr< QgsPolygon > QgsMeshUtils::toPolygon	(	const QgsMeshFace &	face,
		const QVector< QgsMeshVertex > &	vertices
	)

Returns face as polygon geometry, caller is responsible for delete.

Definition at line 213 of file qgstriangularmesh.cpp.