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# DMStagStencilLocation

enumerated type denoting a location relative to an element in a `DMSTAG` grid

## Synopsis

    typedef enum {
      DMSTAG_NULL_LOCATION,
      DMSTAG_BACK_DOWN_LEFT,
      DMSTAG_BACK_DOWN,
      DMSTAG_BACK_DOWN_RIGHT,
      DMSTAG_BACK_LEFT,
      DMSTAG_BACK,
      DMSTAG_BACK_RIGHT,
      DMSTAG_BACK_UP_LEFT,
      DMSTAG_BACK_UP,
      DMSTAG_BACK_UP_RIGHT,
      DMSTAG_DOWN_LEFT,
      DMSTAG_DOWN,
      DMSTAG_DOWN_RIGHT,
      DMSTAG_LEFT,
      DMSTAG_ELEMENT,
      DMSTAG_RIGHT,
      DMSTAG_UP_LEFT,
      DMSTAG_UP,
      DMSTAG_UP_RIGHT,
      DMSTAG_FRONT_DOWN_LEFT,
      DMSTAG_FRONT_DOWN,
      DMSTAG_FRONT_DOWN_RIGHT,
      DMSTAG_FRONT_LEFT,
      DMSTAG_FRONT,
      DMSTAG_FRONT_RIGHT,
      DMSTAG_FRONT_UP_LEFT,
      DMSTAG_FRONT_UP,
      DMSTAG_FRONT_UP_RIGHT
    } DMStagStencilLocation;

The interpretation of these values is dimension-dependent.

## Developer Note

The order of the enum entries is significant, as it corresponds to the canonical numbering of DOFs, and the fact that the numbering starts at 0 may also be used by the implementation.

## See Also

DMSTAG: Staggered, Structured Grid, `DMSTAG`, `DMDA`, `DMStagStencil`, `DMStagGetLocationSlot()`, `DMStagStencilType`

## Level

beginner

## Location

include/petscdmstag.h

## Examples

src/dm/impls/stag/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex2.c
src/dm/impls/stag/tutorials/ex3.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c

## Examples

src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c

## Examples

src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

## Examples

src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c

## Examples

src/dm/impls/stag/tutorials/ex6.c

Index of all DMStag routines
Table of Contents for all manual pages
Index of all manual pages