petsc-3.7.7 2017-09-25
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DMDAGetPreallocationCenterDimension

 Return the topology used to determine adjacency

Synopsis

#include "petscdmda.h"   
PetscErrorCode DMDAGetPreallocationCenterDimension(DM dm, PetscInt *preallocCenterDim)

Input Parameter

dm -The DM object

Output Parameter

preallocCenterDim -The dimension of points which connect adjacent entries

Notes

    FEM:   Two points p and q are adjacent if q \in closure(star(p)), preallocCenterDim = dim

    FVM:   Two points p and q are adjacent if q \in star(cone(p)),    preallocCenterDim = dim-1

    FVM++: Two points p and q are adjacent if q \in star(closure(p)), preallocCenterDim = 0

See Also

DMCreateMatrix(), DMDAPreallocateOperator(), DMDASetPreallocationCenterDimension()

Level:developer
Location:src/dm/impls/da/dapreallocate.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages