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[FEATURE] Introduces mesh virtual datasets With the mesh calculator the user can choose to create those "virtual" dataset groups that will be added to the layer. Then, for these dataset groups, values are not stored in memory but each dataset is calculated when needed whit the formula entered in the mesh calculator. Those virtual dataset groups are saved with the project. If needed, the user can remove them or can persist them on files to make them persistent. Co-authored-by: Étienne Trimaille <gustrimaille@yahoo.fr>
718 lines
22 KiB
Plaintext
718 lines
22 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/mesh/qgsmeshlayer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsMeshLayer : QgsMapLayer
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{
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%Docstring
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Represents a mesh layer supporting display of data on structured or unstructured meshes
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The QgsMeshLayer is instantiated by specifying the name of a data provider,
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such as mdal, and url defining the specific data set to connect to.
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The vector layer constructor in turn instantiates a QgsMeshDataProvider subclass
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corresponding to the provider type, and passes it the url. The data provider
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connects to the data source.
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The QgsMeshLayer provides a common interface to the different data types. It does not
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yet support editing transactions.
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The main data providers supported by QGIS are listed below.
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Mesh data providers
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-------------------
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Memory data providerType (mesh_memory)
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The memory data provider is used to construct in memory data, for example scratch
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data. There is no inherent persistent storage of the data. The data source uri is constructed.
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Data can be populated by setMesh(const QString &vertices, const QString &faces), where
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vertices and faces is comma separated coordinates and connections for mesh.
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E.g. to create mesh with one quad and one triangle
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.. code-block::
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uri = "1.0, 2.0 \n" \
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"2.0, 2.0 \n" \
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"3.0, 2.0 \n" \
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"2.0, 3.0 \n" \
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"1.0, 3.0 \n" \
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"---" \
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"0, 1, 3, 4 \n" \
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"1, 2, 3 \n"
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scratchLayer = QgsMeshLayer(uri, "My Scratch layer", "mesh_memory")
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MDAL data provider (mdal)
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~~~~~~~~~~~~~~~~~~~~~~~~~
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Accesses data using the MDAL drivers (https://github.com/lutraconsulting/MDAL). The url
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is the MDAL connection string. QGIS must be built with MDAL support to allow this provider.
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.. code-block::
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uri = "test/land.2dm"
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scratchLayer = QgsMeshLayer(uri, "My Scratch Layer", "mdal")
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.. note::
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The API is considered EXPERIMENTAL and can be changed without a notice
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.. versionadded:: 3.2
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%End
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%TypeHeaderCode
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#include "qgsmeshlayer.h"
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%End
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public:
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struct LayerOptions
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{
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explicit LayerOptions( const QgsCoordinateTransformContext &transformContext = QgsCoordinateTransformContext( ) );
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%Docstring
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Constructor for LayerOptions with optional ``transformContext``.
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.. note::
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transformContext argument was added in QGIS 3.8
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%End
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QgsCoordinateTransformContext transformContext;
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bool skipCrsValidation;
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};
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explicit QgsMeshLayer( const QString &path = QString(), const QString &baseName = QString(), const QString &providerLib = QStringLiteral( "mesh_memory" ),
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const QgsMeshLayer::LayerOptions &options = QgsMeshLayer::LayerOptions() );
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%Docstring
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Constructor - creates a mesh layer
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The QgsMeshLayer is constructed by instantiating a data provider. The provider
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interprets the supplied path (url) of the data source to connect to and access the
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data.
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:param path: The path or url of the parameter. Typically this encodes
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parameters used by the data provider as url query items.
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:param baseName: The name used to represent the layer in the legend
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:param providerLib: The name of the data provider, e.g., "mesh_memory", "mdal"
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:param options: general mesh layer options
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%End
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~QgsMeshLayer();
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virtual QgsMeshDataProvider *dataProvider();
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%Docstring
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QgsMeshLayer cannot be copied.
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%End
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virtual QgsMeshLayer *clone() const /Factory/;
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virtual QgsRectangle extent() const;
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virtual QgsMapLayerRenderer *createMapRenderer( QgsRenderContext &rendererContext ) /Factory/;
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virtual bool readSymbology( const QDomNode &node, QString &errorMessage,
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QgsReadWriteContext &context, QgsMapLayer::StyleCategories categories = QgsMapLayer::AllStyleCategories );
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virtual bool writeSymbology( QDomNode &node, QDomDocument &doc, QString &errorMessage,
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const QgsReadWriteContext &context, QgsMapLayer::StyleCategories categories = QgsMapLayer::AllStyleCategories ) const;
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virtual bool writeStyle( QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &context, StyleCategories categories = AllStyleCategories ) const;
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virtual bool readStyle( const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, StyleCategories categories = AllStyleCategories );
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virtual QString encodedSource( const QString &source, const QgsReadWriteContext &context ) const;
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virtual QString decodedSource( const QString &source, const QString &provider, const QgsReadWriteContext &context ) const;
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virtual bool readXml( const QDomNode &layer_node, QgsReadWriteContext &context );
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virtual bool writeXml( QDomNode &layer_node, QDomDocument &doc, const QgsReadWriteContext &context ) const;
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virtual QgsMapLayerTemporalProperties *temporalProperties();
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virtual void reload();
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virtual QStringList subLayers() const;
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QString providerType() const;
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%Docstring
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Returns the provider type for this layer
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%End
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bool addDatasets( const QString &path, const QDateTime &defaultReferenceTime = QDateTime() );
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%Docstring
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Adds datasets to the mesh from file with ``path``. Use the the time ``defaultReferenceTime`` as reference time is not provided in the file
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:param path: the path to the atasets file
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:param defaultReferenceTime: reference time used if not provided in the file
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:return: whether the dataset is added
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.. versionadded:: 3.14
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%End
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bool saveDataset( const QString &path, int datasetGroupIndex, QString driver );
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%Docstring
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Saves datasets group on file with the specified ``driver``
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:param path: the path of the file
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:param datasetGroupIndex: the index of the dataset group
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:param driver: the driver to used for saving
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:return: false if succeeds
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.. versionadded:: 3.16
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%End
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void updateTriangularMesh( const QgsCoordinateTransform &transform = QgsCoordinateTransform() );
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%Docstring
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Gets native mesh and updates (creates if it doesn't exist) the base triangular mesh
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:param transform: Transformation from layer CRS to destination (e.g. map) CRS. With invalid transform, it keeps the native mesh CRS
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.. versionadded:: 3.14
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%End
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QgsMeshRendererSettings rendererSettings() const;
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%Docstring
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Returns renderer settings
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%End
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void setRendererSettings( const QgsMeshRendererSettings &settings );
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%Docstring
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Sets new renderer settings
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%End
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QgsMeshTimeSettings timeSettings() const;
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%Docstring
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Returns time format settings
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.. versionadded:: 3.8
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%End
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void setTimeSettings( const QgsMeshTimeSettings &settings );
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%Docstring
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Sets time format settings
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.. versionadded:: 3.8
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%End
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QString formatTime( double hours );
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%Docstring
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Returns (date) time in hours formatted to human readable form
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:param hours: time in double in hours
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:return: formatted time string
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.. versionadded:: 3.8
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%End
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int datasetGroupCount() const;
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%Docstring
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Returns the dataset groups count handle by the layer
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.. versionadded:: 3.16
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%End
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int extraDatasetGroupCount() const;
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%Docstring
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Returns the extra dataset groups count handle by the layer
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.. versionadded:: 3.16
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%End
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QList<int> datasetGroupsIndexes() const;
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%Docstring
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Returns the list of indexes of dataset groups count handled by the layer
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDatasetGroupMetadata datasetGroupMetadata( const QgsMeshDatasetIndex &index ) const;
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%Docstring
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Returns the dataset groups metadata
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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int datasetCount( const QgsMeshDatasetIndex &index ) const;
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%Docstring
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Returns the dataset count in the dataset groups
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:param index: index of the dataset in the group
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDatasetMetadata datasetMetadata( const QgsMeshDatasetIndex &index ) const;
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%Docstring
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Returns the dataset metadata
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:param index: index of the dataset
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDatasetValue datasetValue( const QgsMeshDatasetIndex &index, int valueIndex ) const;
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%Docstring
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Returns vector/scalar value associated with the index from the dataset
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To read multiple continuous values, use :py:func:`~QgsMeshLayer.datasetValues`
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See :py:func:`QgsMeshDatasetMetadata.isVector()` or :py:func:`QgsMeshDataBlock.type()`
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to check if the returned value is vector or scalar
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Returns invalid value for DataOnVolumes
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:param index: index of the dataset
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:param valueIndex: index of the value
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDataBlock datasetValues( const QgsMeshDatasetIndex &index, int valueIndex, int count ) const;
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%Docstring
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Returns N vector/scalar values from the index from the dataset
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See :py:func:`QgsMeshDatasetMetadata.isVector()` or :py:func:`QgsMeshDataBlock.type()`
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to check if the returned value is vector or scalar
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Returns invalid block for DataOnVolumes. Use :py:func:`QgsMeshLayerUtils.datasetValues()` if you
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need block for any type of data type
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:param index: index of the dataset
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:param valueIndex: index of the value
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:param count: number of values to return
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMesh3dDataBlock dataset3dValues( const QgsMeshDatasetIndex &index, int faceIndex, int count ) const;
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%Docstring
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Returns N vector/scalar values from the face index from the dataset for 3d stacked meshes
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See :py:func:`QgsMeshDatasetMetadata.isVector()` to check if the returned value is vector or scalar
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returns invalid block for DataOnFaces and DataOnVertices.
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:param index: index of the dataset
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:param valueIndex: index of the value
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:param count: number of values to return
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes can be different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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bool isFaceActive( const QgsMeshDatasetIndex &index, int faceIndex ) const;
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%Docstring
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Returns N vector/scalar values from the face index from the dataset for 3d stacked meshes
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See :py:func:`QgsMeshDatasetMetadata.isVector()` to check if the returned value is vector or scalar
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returns invalid block for DataOnFaces and DataOnVertices.
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%End
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QgsMeshDataBlock areFacesActive( const QgsMeshDatasetIndex &index, int faceIndex, int count ) const;
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%Docstring
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Returns whether the faces are active for particular dataset
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:param index: index of the dataset
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:param valueIndex: index of the value
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:param count: number of values to return
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDatasetValue datasetValue( const QgsMeshDatasetIndex &index, const QgsPointXY &point, double searchRadius = 0 ) const;
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%Docstring
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Interpolates the value on the given point from given dataset.
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For 3D datasets, it uses :py:func:`~QgsMeshLayer.dataset3dValue`, \n
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For 1D datasets, it uses :py:func:`~QgsMeshLayer.dataset1dValue` with ``searchRadius``
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.. note::
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It uses previously cached and indexed triangular mesh
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and so if the layer has not been rendered previously
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(e.g. when used in a script) it returns NaN value
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.. seealso:: :py:func:`updateTriangularMesh`
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:param index: dataset index specifying group and dataset to extract value from
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:param point: point to query in map coordinates
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:param searchRadius: the radius of the search area in map unit
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:return: interpolated value at the point. Returns NaN values for values
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outside the mesh layer, nodata values and in case triangular mesh was not
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previously used for rendering
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.4
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%End
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QgsMesh3dDataBlock dataset3dValue( const QgsMeshDatasetIndex &index, const QgsPointXY &point ) const;
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%Docstring
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Returns the 3d values of stacked 3d mesh defined by the given point
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.. note::
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It uses previously cached and indexed triangular mesh
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and so if the layer has not been rendered previously
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(e.g. when used in a script) it returns NaN value
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.. seealso:: :py:func:`updateTriangularMesh`
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:param index: dataset index specifying group and dataset to extract value from
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:param point: point to query in map coordinates
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:return: all 3d stacked values that belong to face defined by given point. Returns invalid block
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for point outside the mesh layer or in case triangular mesh was not
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previously used for rendering or for datasets that do not have type DataOnVolumes
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.12
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%End
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QgsMeshDatasetValue dataset1dValue( const QgsMeshDatasetIndex &index, const QgsPointXY &point, double searchRadius ) const;
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%Docstring
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Returns the value of 1D mesh dataset defined on edge that are in the search area defined by point ans searchRadius
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.. note::
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It uses previously cached and indexed triangular mesh
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and so if the layer has not been rendered previously
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(e.g. when used in a script) it returns NaN value
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.. seealso:: :py:func:`updateTriangularMesh`
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:param index: dataset index specifying group and dataset to extract value from
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:param point: the center point of the search area
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:param searchRadius: the radius of the searc area in map unit
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:return: interpolated value at the projected point. Returns NaN values for values
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outside the mesh layer and in case triangular mesh was not previously used for rendering
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.14
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%End
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QgsMeshDatasetIndex datasetIndexAtTime( const QgsDateTimeRange &timeRange, int datasetGroupIndex ) const;
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%Docstring
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Returns dataset index from datasets group depending on the time range.
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If the temporal properties is not active, returns invalid dataset index. This method is used for rendering mesh layer.
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:param timeRange: the time range
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:return: dataset index
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.. note::
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the returned dataset index depends on the matching method, see :py:func:`~QgsMeshLayer.setTemporalMatchingMethod`
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.14
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%End
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QgsMeshDatasetIndex datasetIndexAtRelativeTime( const QgsInterval &relativeTime, int datasetGroupIndex ) const;
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%Docstring
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Returns dataset index from datasets group depending on the relative time from the layer reference time.
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Dataset index is valid even the temporal properties is inactive. This method is used for calculation on mesh layer.
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:param relativeTime: the relative from the mesh layer reference time
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:return: dataset index
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.. note::
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the returned dataset index depends on the matching method, see :py:func:`~QgsMeshLayer.setTemporalMatchingMethod`
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.. note::
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indexes are used to distinguish all the dataset groups handled by the layer (from dataprovider, extra dataset group,...)
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In the layer scope, those indexes are different from the data provider indexes.
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.. versionadded:: 3.16
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%End
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QgsMeshDatasetIndex activeScalarDatasetAtTime( const QgsDateTimeRange &timeRange ) const;
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%Docstring
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Returns dataset index from active scalar group depending on the time range.
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If the temporal properties is not active, return the static dataset
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:param timeRange: the time range
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:return: dataset index
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.. note::
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the returned dataset index depends on the matching method, see :py:func:`~QgsMeshLayer.setTemporalMatchingMethod`
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.. versionadded:: 3.14
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%End
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QgsMeshDatasetIndex activeVectorDatasetAtTime( const QgsDateTimeRange &timeRange ) const;
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%Docstring
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Returns dataset index from active vector group depending on the time range
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If the temporal properties is not active, return the static dataset
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:param timeRange: the time range
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:return: dataset index
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.. note::
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the returned dataset index depends on the matching method, see :py:func:`~QgsMeshLayer.setTemporalMatchingMethod`
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.. versionadded:: 3.14
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%End
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QgsMeshDatasetIndex staticScalarDatasetIndex() const;
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%Docstring
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|
Returns the static scalar dataset index that is rendered if the temporal properties is not active
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.. versionadded:: 3.14
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%End
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QgsMeshDatasetIndex staticVectorDatasetIndex() const;
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%Docstring
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|
Returns the static vector dataset index that is rendered if the temporal properties is not active
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.. versionadded:: 3.14
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%End
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void setReferenceTime( const QDateTime &referenceTime );
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%Docstring
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|
Sets the reference time of the layer
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:param referenceTime: the reference time
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.. versionadded:: 3.14
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%End
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void setTemporalMatchingMethod( const QgsMeshDataProviderTemporalCapabilities::MatchingTemporalDatasetMethod &matchingMethod );
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%Docstring
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|
Sets the method used to match the temporal dataset from a requested time, see :py:func:`~QgsMeshLayer.activeVectorDatasetAtTime`
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:param matchingMethod: the matching method
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.. versionadded:: 3.14
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%End
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QgsPointXY snapOnElement( QgsMesh::ElementType elementType, const QgsPointXY &point, double searchRadius );
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%Docstring
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|
Returns the position of the snapped point on the mesh element closest to ``point`` intersecting with
|
|
the searching area defined by ``point`` and ``searchRadius``
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|
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|
For vertex, the snapped position is the vertex position
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For edge, the snapped position is the projected point on the edge, extremity of edge if outside the edge
|
|
For face, the snapped position is the centroid of the face
|
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The returned position is in map coordinates.
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|
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.. note::
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|
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|
It uses previously cached and indexed triangular mesh
|
|
and so if the layer has not been rendered previously
|
|
(e.g. when used in a script) it returns empty :py:class:`QgsPointXY`
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.. seealso:: :py:func:`updateTriangularMesh`
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:param elementType: the type of element to snap
|
|
:param point: the center of the search area in map coordinates
|
|
:param searchRadius: the radius of the search area in map units
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:return: the position of the snapped point on the closest element, empty QgsPointXY if no element of type ``elementType``
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|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
QgsMeshDatasetGroupTreeItem *datasetGroupTreeRootItem() const;
|
|
%Docstring
|
|
Returns the root items of the dataset group tree item
|
|
|
|
:return: the root item
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
void setDatasetGroupTreeRootItem( QgsMeshDatasetGroupTreeItem *rootItem );
|
|
%Docstring
|
|
Sets the root items of the dataset group tree item.
|
|
Changes active dataset groups if those one are not enabled anymore :
|
|
|
|
- new active scalar dataset group is the first root item enabled child
|
|
- new active vector dataset group is none
|
|
|
|
Doesn't take ownership of the pointed item, the root item is cloned.
|
|
|
|
:param rootItem: the new root item
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
void resetDatasetGroupTreeItem();
|
|
%Docstring
|
|
Reset the dataset group tree item to default from provider
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
QgsInterval firstValidTimeStep() const;
|
|
%Docstring
|
|
Returns the first valid time step of the dataset groups, invalid QgInterval if no time step is present
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
QgsInterval datasetRelativeTime( const QgsMeshDatasetIndex &index );
|
|
%Docstring
|
|
Returns the relative time of the dataset from the reference time of its group
|
|
|
|
.. versionadded:: 3.16
|
|
%End
|
|
|
|
qint64 datasetRelativeTimeInMilliseconds( const QgsMeshDatasetIndex &index );
|
|
%Docstring
|
|
Returns the relative time (in milliseconds) of the dataset from the reference time of its group
|
|
|
|
.. versionadded:: 3.16
|
|
%End
|
|
|
|
public slots:
|
|
|
|
virtual void setTransformContext( const QgsCoordinateTransformContext &transformContext );
|
|
|
|
%Docstring
|
|
Sets the coordinate transform context to ``transformContext``.
|
|
|
|
.. versionadded:: 3.8
|
|
%End
|
|
|
|
signals:
|
|
|
|
void activeScalarDatasetGroupChanged( int index );
|
|
%Docstring
|
|
Emitted when active scalar group dataset is changed
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
void activeVectorDatasetGroupChanged( int index );
|
|
%Docstring
|
|
Emitted when active vector group dataset is changed
|
|
|
|
.. versionadded:: 3.14
|
|
%End
|
|
|
|
void timeSettingsChanged( );
|
|
%Docstring
|
|
Emitted when time format is changed
|
|
|
|
.. versionadded:: 3.8
|
|
%End
|
|
|
|
private: // Private methods
|
|
QgsMeshLayer( const QgsMeshLayer &rhs );
|
|
};
|
|
|
|
/************************************************************************
|
|
* This file has been generated automatically from *
|
|
* *
|
|
* src/core/mesh/qgsmeshlayer.h *
|
|
* *
|
|
* Do not edit manually ! Edit header and run scripts/sipify.pl again *
|
|
************************************************************************/
|