QgsMeshDataSourceInterface Class Reference

Interface for mesh data sources. More...

#include <qgsmeshdataprovider.h>

Inheritance diagram for QgsMeshDataSourceInterface:

Public Member Functions
virtual	~QgsMeshDataSourceInterface ()=default
bool	contains (const QgsMesh::ElementType &type) const
	Returns whether the mesh contains at mesh elements of given type.
virtual int	edgeCount () const =0
	Returns number of edges in the native mesh.
virtual int	faceCount () const =0
	Returns number of faces in the native mesh.
virtual int	maximumVerticesCountPerFace () const
	Returns the maximum number of vertices per face supported by the current mesh, if returns 0, the number of vertices is unlimited.
virtual void	populateMesh (QgsMesh *mesh) const =0
	Populates the mesh vertices, edges and faces.
virtual bool	saveMeshFrame (const QgsMesh &mesh)=0
	Saves the mesh frame to the source.
virtual int	vertexCount () const =0
	Returns number of vertices in the native mesh.

Detailed Description

Interface for mesh data sources.

Mesh is a collection of vertices, edges and faces in 2D or 3D space

• vertex - XY(Z) point (in the mesh's coordinate reference system)
• edge - two XY(Z) points (in the mesh's coordinate reference system) representing straight seqment
• faces - sets of vertices forming a closed shape - typically triangles or quadrilaterals

Base on the underlying data provider/format, whole mesh is either stored in memory or read on demand

Note

The API is considered EXPERIMENTAL and can be changed without a notice

Since

QGIS 3.2

Definition at line 139 of file qgsmeshdataprovider.h.

Constructor & Destructor Documentation

~QgsMeshDataSourceInterface()

virtual QgsMeshDataSourceInterface::~QgsMeshDataSourceInterface ( )

virtualdefault

Member Function Documentation

contains()

bool QgsMeshDataSourceInterface::contains

(

const QgsMesh::ElementType &

type

)

const

Returns whether the mesh contains at mesh elements of given type.

Since

QGIS 3.14

Definition at line 226 of file qgsmeshdataprovider.cpp.

edgeCount()

virtual int QgsMeshDataSourceInterface::edgeCount ( ) const

pure virtual

Returns number of edges in the native mesh.

Returns

Number of edges in the mesh

Since

QGIS 3.14

faceCount()

virtual int QgsMeshDataSourceInterface::faceCount ( ) const

pure virtual

Returns number of faces in the native mesh.

Returns

Number of faces in the mesh

maximumVerticesCountPerFace()

virtual int QgsMeshDataSourceInterface::maximumVerticesCountPerFace ( ) const

inlinevirtual

Returns the maximum number of vertices per face supported by the current mesh, if returns 0, the number of vertices is unlimited.

Returns

Maximum number of vertices per face

Since

QGIS 3.22

Definition at line 179 of file qgsmeshdataprovider.h.

populateMesh()

virtual void QgsMeshDataSourceInterface::populateMesh ( QgsMesh *  mesh ) const

pure virtual

Populates the mesh vertices, edges and faces.

Since

QGIS 3.6

saveMeshFrame()

virtual bool QgsMeshDataSourceInterface::saveMeshFrame ( const QgsMesh &  mesh )

pure virtual

Saves the mesh frame to the source.

Parameters

mesh	the mesh to save

Returns

true on success

Since

QGIS 3.22

vertexCount()

virtual int QgsMeshDataSourceInterface::vertexCount ( ) const

pure virtual

Returns number of vertices in the native mesh.

Returns

Number of vertices in the mesh

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The documentation for this class was generated from the following files:

• /build/qgis-3.40.0+99sid/src/core/mesh/qgsmeshdataprovider.h
• /build/qgis-3.40.0+99sid/src/core/mesh/qgsmeshdataprovider.cpp