Class: QgsMeshTriangulation¶

Handles mesh creation with Delaunay constrained triangulation.

Added in version 3.16.

Class Hierarchy¶

Methods

`addBreakLines`	Adds break lines from a vector layer, return `True` if successful.
`addVertex`	Adds a new vertex in the triangulation and returns the index of the new vertex
`addVertices`	Adds vertices to the triangulation from a feature iterator, return `True` if successful.
`setCrs`	Sets the coordinate reference system used for the triangulation
`triangulatedMesh`	Returns the triangulated mesh

class qgis.analysis.QgsMeshTriangulation[source]¶

Bases: QObject

addBreakLines(self, lineFeatureIterator: QgsFeatureIterator, valueAttribute: int, transformContext: QgsCoordinateTransform, feedback: QgsFeedback | None = None, featureCount: int = 1) → bool[source]¶

Adds break lines from a vector layer, return True if successful.

Parameters:

lineFeatureIterator (QgsFeatureIterator) – the feature iterator of break lines to insert
valueAttribute (int) – the index of the attribute that represents the value of vertices, if -1 uses Z coordinate of vertices
transformContext (QgsCoordinateTransform) – the coordinates transform context used to transform coordinates
feedback (Optional[QgsFeedback] = None) – feedback argument may be specified to allow cancellation and progress reports
featureCount (int = 1) – the count of feature to allow progress report of the feedback

Warning

if the feature iterator contains only point geometries, the vertices will be added only without treating them as breaklines

addVertex(self, vertex: QgsPoint) → int[source]¶

Adds a new vertex in the triangulation and returns the index of the new vertex

Added in version 3.22.

addVertices(self, vertexFeatureIterator: QgsFeatureIterator, valueAttribute: int, transform: QgsCoordinateTransform, feedback: QgsFeedback | None = None, featureCount: int = 1) → bool[source]¶

Adds vertices to the triangulation from a feature iterator, return True if successful.

Parameters:

vertexFeatureIterator (QgsFeatureIterator) – the feature iterator of vertices to insert
valueAttribute (int) – the index of the attribute that represents the value of vertices, if -1 uses Z coordinate of vertices
transform (QgsCoordinateTransform) – the coordinates transform used to transform coordinates
feedback (Optional[QgsFeedback] = None) – feedback argument may be specified to allow cancellation and progress reports
featureCount (int = 1) – the count of feature to allow progress report of the feedback

Return type:

bool

Sets the coordinate reference system used for the triangulation

triangulatedMesh(self, feedback: QgsFeedback | None = None) → QgsMesh[source]¶

Returns the triangulated mesh