QgsMeshUtils Namespace Reference

Functions
CORE_EXPORT QgsMeshVertex	centroid (const QgsMeshFace &face, const QVector< QgsMeshVertex > &vertices)
	Returns the centroid of the face. More...
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 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. More...
bool	isInTriangleFace (const QgsPointXY point, const QgsMeshFace &face, const QVector< QgsMeshVertex > &vertices)
	Tests if point p is on the face defined with vertices. More...
CORE_EXPORT QSet< int >	nativeEdgesFromEdges (const QList< int > &edgesIndexes, const QVector< int > &edgesToNativeEdges)
	Returns unique native faces indexes from list of triangle indexes. More...
CORE_EXPORT QSet< int >	nativeFacesFromTriangles (const QList< int > &triangleIndexes, const QVector< int > &trianglesToNativeFaces)
	Returns unique native faces indexes from list of triangle indexes. More...
CORE_EXPORT QSet< int >	nativeVerticesFromEdges (const QList< int > &edgesIndexes, const QVector< QgsMeshEdge > &edges)
	Returns unique native faces indexes from list of vertices of triangles. More...
CORE_EXPORT QSet< int >	nativeVerticesFromTriangles (const QList< int > &triangleIndexes, const QVector< QgsMeshFace > &triangles)
	Returns unique native vertex indexes from list of vertices of triangles. More...
void	setCounterClockwise (QgsMeshFace &triangle, const QgsMeshVertex &v0, const QgsMeshVertex &v1, const QgsMeshVertex &v2)
	Checks if the triangle is counter clockwise, if not sets it counter clockwise. 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

centroid()

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

Returns the centroid of the face.

Definition at line 960 of file qgstriangularmesh.cpp.

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 194 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 260 of file qgsmeshlayerinterpolator.cpp.

isInTriangleFace()

bool QgsMeshUtils::isInTriangleFace	(	const QgsPointXY	point,
		const QgsMeshFace &	face,
		const QVector< QgsMeshVertex > &	vertices
	)

Tests if point p is on the face defined with vertices.

Since

QGIS 3.12

Definition at line 685 of file qgstriangularmesh.cpp.

nativeEdgesFromEdges()

QSet< int > QgsMeshUtils::nativeEdgesFromEdges	(	const QList< int > &	edgesIndexes,
		const QVector< int > &	edgesToNativeEdges
	)

Returns unique native faces indexes from list of triangle indexes.

Since

QGIS 3.14

Definition at line 667 of file qgstriangularmesh.cpp.

nativeFacesFromTriangles()

QSet< 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 662 of file qgstriangularmesh.cpp.

nativeVerticesFromEdges()

QSet< int > QgsMeshUtils::nativeVerticesFromEdges	(	const QList< int > &	edgesIndexes,
		const QVector< QgsMeshEdge > &	edges
	)

Returns unique native faces indexes from list of vertices of triangles.

Since

QGIS 3.14

Definition at line 717 of file qgstriangularmesh.cpp.

nativeVerticesFromTriangles()

QSet< int > QgsMeshUtils::nativeVerticesFromTriangles	(	const QList< int > &	triangleIndexes,
		const QVector< QgsMeshFace > &	triangles
	)

Returns unique native vertex indexes from list of vertices of triangles.

Since

QGIS 3.14

Definition at line 703 of file qgstriangularmesh.cpp.

setCounterClockwise()

void QgsMeshUtils::setCounterClockwise	(	QgsMeshFace &	triangle,
		const QgsMeshVertex &	v0,
		const QgsMeshVertex &	v1,
		const QgsMeshVertex &	v2
	)

Checks if the triangle is counter clockwise, if not sets it counter clockwise.

Since

QGIS 3.22

Definition at line 975 of file qgstriangularmesh.cpp.

toGeometry()

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

Returns face as polygon geometry.

Definition at line 643 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 628 of file qgstriangularmesh.cpp.