ngsPETSc.plex

This module contains all the functions related to wrapping NGSolve meshes to PETSc DMPlex using the petsc4py interface.

Attributes

FACE_SETS_LABEL

CELL_SETS_LABEL

EDGE_SETS_LABEL

Classes

ngs

dummy class

MeshMapping

A mapping between a Netgen/NGSolve mesh and a PETSc DMPlex

Functions

buildSimplices(plex[, points])

Return a numpy.array with the vertices of each simplex in the plex

addSimplices(ngMesh, dim, index, data, ...)

Add simplices to a Netgen mesh

createNetgenMesh(plex, geo)

Create a Netgen mesh from the local part of a PETSc DMPlex

createPETScDMPlex(ngMesh, comm, name)

Create a PETSc DMPlex from a Netgen/NGSolve mesh object

Module Contents

class ngsPETSc.plex.ngs

dummy class

class comp

dummy class

Mesh
ngsPETSc.plex.FACE_SETS_LABEL = 'Face Sets'
ngsPETSc.plex.CELL_SETS_LABEL = 'Cell Sets'
ngsPETSc.plex.EDGE_SETS_LABEL = 'Edge Sets'
class ngsPETSc.plex.MeshMapping(mesh, comm=None, geo=None, name='Default')

A mapping between a Netgen/NGSolve mesh and a PETSc DMPlex

Parameters:

  • mesh – the source mesh, either a Netgen/NGSolve mesh or a PETSc DMPlex

  • comm – an optional MPI.Comm

  • geo – the underlying Netgen geometry, ignored if mesh is a Netgen mesh

  • name – the name of to be assigned to the PETSc DMPlex, by default this is set to “Default”

petscPlex
ngMesh
comm = None
geo
geoInfo
ngsPETSc.plex.buildSimplices(plex, points=None)

Return a numpy.array with the vertices of each simplex in the plex

Parameters:

  • plex – PETSc DMPlex

  • points – iterable of DMPlex points (must be of the same dimension)

ngsPETSc.plex.addSimplices(ngMesh, dim, index, data, project_geometry, isoccgeom, edgenr_mapping)

Add simplices to a Netgen mesh

Parameters:

  • ngMesh – the Netgen Mesh

  • dim – the simplex dimension

  • index – the region index

  • data – a numpy.array with the vertices of each simplex

Project_geometry:

whether to project points to the geometry

Isoccgeom:

whether we have an OCCGeometry, required to decide index conventions

Edgenr_mapping:

a dict mapping from region index to edgenr

ngsPETSc.plex.createNetgenMesh(plex, geo)

Create a Netgen mesh from the local part of a PETSc DMPlex

Parameters:

  • plex – the PETSc DMPlex to be converted in NGSolve mesh object

  • geo – Netgen geometry or Netgen mesh to extract geometry from

ngsPETSc.plex.createPETScDMPlex(ngMesh, comm, name)

Create a PETSc DMPlex from a Netgen/NGSolve mesh object

Parameters:

  • ngMesh – the serial Netgen mesh object to be converted

  • comm – the MPI.Comm object

Returns:

a tuple of Netgen mesh and DMPlex