petscmain 20210420
MatMeshToVertexGraph
This routine does not exist because ParMETIS does not provide the functionality. Uses the ParMETIS package to convert a Mat that represents a mesh to a Mat the represents the graph of the coupling between vertices of the cells and is suitable for partitioning with the MatPartitioning object. Use this to partition vertices of a mesh. More likely you should use MatMeshToCellGraph()
Synopsis
#include "petscmat.h"
PetscErrorCode MatMeshToVertexGraph(Mat mesh,PetscInt ncommonnodes,Mat *dual)
Collective on Mat
Input Parameter
 mesh   the graph that represents the mesh

 ncommonnodes   mesh elements that share this number of common nodes are considered neighbors, use 2 for triangles and
quadrilaterials, 3 for tetrahedrals and 4 for hexahedrals

Output Parameter
Notes
Currently requires ParMetis to be installed and uses ParMETIS_V3_Mesh2Dual()
The columns of each row of the Mat mesh are the global vertex numbers of the vertices of that rows cell. The number of rows in mesh is
number of cells, the number of columns is the number of vertices.
See Also
MatMeshToCellGraph(), MatCreateMPIAdj(), MatPartitioningCreate()
Level
advanced
Location
src/mat/partition/impls/pmetis/pmetis.c
Index of all MatOrderings routines
Table of Contents for all manual pages
Index of all manual pages