petsc-dev 2014-04-16
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DMDACreateSection

Create a PetscSection inside the DMDA that describes data layout. This allows multiple fields with different numbers of dofs on vertices, cells, and faces in each direction.

Synopsis

#include "petscdmda.h"   
PetscErrorCode DMDACreateSection(DM dm, const PetscInt numComp[], const PetscInt numDof[], const PetscInt numFaceDof[], PetscSection *s)

Input Parameters

Note

The default DMDA numbering is as follows

- Cells: [0, nC) - Vertices: [nC, nC+nV) - X-Faces: [nC+nV, nC+nV+nXF) normal is +- x-dir - Y-Faces: [nC+nV+nXF, nC+nV+nXF+nYF) normal is +- y-dir - Z-Faces: [nC+nV+nXF+nYF, nC+nV+nXF+nYF+nZF) normal is +- z-dir

We interpret the default DMDA partition as a cell partition, and the data assignment as a cell assignment.

Level:developer
Location:
src/dm/impls/da/dalocal.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

dm- The DMDA
numFields - The number of fields
numComp - The number of components in each field
numDof - The number of dofs per dimension for each field
numFaceDof - The number of dofs per face for each field and direction, or NULL