petsc-3.7.3 2016-07-24
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# DMBoundaryType

Describes the choice for fill of ghost cells on physical domain boundaries.

### Synopsis

    typedef enum {DM_BOUNDARY_NONE, DM_BOUNDARY_GHOSTED, DM_BOUNDARY_MIRROR, DM_BOUNDARY_PERIODIC, DM_BOUNDARY_TWIST} DMBoundaryType;

A boundary may be of type DM_BOUNDARY_NONE (no ghost nodes), DM_BOUNDARY_GHOSTED (ghost vertices/cells exist but aren't filled, you can put values into them and then apply a stencil that uses those ghost locations), DM_BOUNDARY_MIRROR (not yet implemented for 3d), DM_BOUNDARY_PERIODIC (ghost vertices/cells filled by the opposite edge of the domain), or DM_BOUNDARY_TWIST (like periodic, only glued backwards like a Mobius strip).

Note: This is information for the boundary of the __PHYSICAL__ domain. It has nothing to do with boundaries between processes, that width is always determined by the stencil width, see DMDASetStencilWidth().

### See Also

DMDASetBoundaryType(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMDACreate()

Level:beginner
Location: src/dm/../../include/petscdmtypes.h
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/dm/examples/tutorials/ex13f90aux.F90.html