Class: QgsMeshDataSourceInterface

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

Added in version 3.2.

Class Hierarchy

Subclasses

QgsMeshDataProvider

Base class for providing data for QgsMeshLayer

Methods

contains	Returns whether the mesh contains at mesh elements of given type
edgeCount	Returns number of edges in the native mesh
faceCount	Returns number of faces in the native mesh
maximumVerticesCountPerFace	Returns the maximum number of vertices per face supported by the current mesh, if returns 0, the number of vertices is unlimited
populateMesh	Populates the mesh vertices, edges and faces
saveMeshFrame	Saves the mesh frame to the source.
vertexCount	Returns number of vertices in the native mesh

class qgis.core.QgsMeshDataSourceInterface

Bases: object

contains(self, type: QgsMesh.ElementType) → bool

Returns whether the mesh contains at mesh elements of given type

Added in version 3.14.

Parameters:

type (QgsMesh.ElementType)

Return type:

bool

edgeCount(self) → int

Returns number of edges in the native mesh

Return type:

int

Returns:

Number of edges in the mesh

Added in version 3.14.

faceCount(self) → int

Returns number of faces in the native mesh

Return type:

int

Returns:

Number of faces in the mesh

maximumVerticesCountPerFace(self) → int

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

Return type:

int

Returns:

Maximum number of vertices per face

Added in version 3.22.

populateMesh(self, mesh: QgsMesh | None)

Populates the mesh vertices, edges and faces

Added in version 3.6.

Parameters:

mesh (Optional[QgsMesh])

saveMeshFrame(self, mesh: QgsMesh) → bool

Saves the mesh frame to the source.

Parameters:

mesh (QgsMesh) – the mesh to save

Return type:

bool

Returns:

True on success

Added in version 3.22.

vertexCount(self) → int

Returns number of vertices in the native mesh

Return type:

int

Returns:

Number of vertices in the mesh