PETSc version 3.17.4
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# DMDAGetGhostCorners

Returns the global (x,y,z) indices of the lower left corner and size of the local region, including ghost points.

### Synopsis

    #include "petscdmda.h"
    PetscErrorCode  DMDAGetGhostCorners(DM da,PetscInt *x,PetscInt *y,PetscInt *z,PetscInt *m,PetscInt *n,PetscInt *p)

Not Collective

### Input Parameter

| da | - the distributed array

### Output Parameters

| x | - the corner index for the first dimension
| y | - the corner index for the second dimension (only used in 2D and 3D problems)
| z | - the corner index for the third dimension (only used in 3D problems)
| m | - the width in the first dimension
| n | - the width in the second dimension (only used in 2D and 3D problems)
| p | - the width in the third dimension (only used in 3D problems)

### Note

The corner information is independent of the number of degrees of freedom per node set with the DMDACreateXX() routine. Thus the x, y, z, and m, n, p can be thought of as coordinates on a logical grid, where each grid point has (potentially) several degrees of freedom. Any of y, z, n, and p can be passed in as NULL if not needed.

### See Also

DMDAGetCorners(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMDAGetOwnershipRanges(), DMStagGetGhostCorners()

### Level

beginner

### Location

src/dm/impls/da/daghost.c

### Examples

src/ksp/ksp/tutorials/ex42.c.html
src/ksp/ksp/tutorials/ex43.c.html
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex70.c.html
src/ksp/ksp/tutorials/ex14f.F90.html
src/snes/tutorials/ex48.c.html
src/snes/tutorials/ex5f.F90.html
src/snes/tutorials/ex5f90.F90.html
src/snes/tutorials/ex5f90t.F90.html
src/ts/tutorials/ex14.c.html
src/ts/tutorials/ex22f.F.html
Index of all DMDA routines
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Index of all manual pages