PETSc version 3.16.6
DMDAGetElements
Gets an array containing the indices (in local coordinates) of all the local elements
Synopsis
#include "petscdmda.h"
PetscErrorCode DMDAGetElements(DM dm,PetscInt *nel,PetscInt *nen,const PetscInt *e[])
Not Collective
Input Parameter
Output Parameters
| nel | - number of local elements
|
| nen | - number of element nodes
|
| e | - the local indices of the elements' vertices
|
Notes
Call DMDARestoreElements() once you have finished accessing the elements.
Each process uniquely owns a subset of the elements. That is no element is owned by two or more processes.
If on each process you integrate over its owned elements and use ADD_VALUES in Vec/MatSetValuesLocal() then you'll obtain the correct result.
Not supported in Fortran
See Also
DMDAElementType, DMDASetElementType(), VecSetValuesLocal(), MatSetValuesLocal(), DMGlobalToLocalBegin(), DMLocalToGlobalBegin()
Level
intermediate
Location
src/dm/impls/da/dagetelem.c
Examples
src/dm/tutorials/ex5.c.html
src/ksp/ksp/tutorials/ex70.c.html
src/ksp/ksp/tutorials/ex71.c.html
Implementations
DMDAGetElements_1D in src/dm/impls/da/dagetelem.c
DMDAGetElements_2D in src/dm/impls/da/dagetelem.c
DMDAGetElements_3D in src/dm/impls/da/dagetelem.c
Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages