#include "petscdmda.h" PetscErrorCode DMDAGetProcessorSubset(DM da,DMDirection dir,PetscInt gp,MPI_Comm *comm)Collective on da
|da||- the distributed array|
|dir||- Cartesian direction, either DM_X, DM_Y, or DM_Z|
|gp||- global grid point number in this direction|
After use, comm should be freed with MPI_Comm_free()
This routine is particularly useful to compute boundary conditions or other Section 1.5 Writing Application Codes with PETSc-specific calculations that require manipulating sets of data throughout a logical plane of grid points.
Not supported from Fortran