petsc-3.11.4 2019-09-28

DMStagStencil

data structure representing a degree of freedom on a DMStag grid

Synopsis

typedef struct {
  DMStagStencilLocation loc;
  PetscInt              i,j,k,c;
} DMStagStencil;

Data structure (C struct), analogous to describing a degree of freedom associated with a DMStag object, in terms of a global element index in each of up to three directions, a "location" as defined by DMStagStencilLocation, and a component number. Primarily for use with DMStagMatSetValuesStencil() (compare with use of MatStencil with MatSetValuesStencil()).

Note

The component (c) field must always be set, even if there is a single component at a given location (in which case c should be set to 0).

Level

beginner

Location

src/dm/impls/stag/../../../../include/petscdmstag.h

Examples