petsc-3.14.6 2021-03-30
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DMPlexPointLocalRead

 return read access to a point in local array

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexPointLocalRead(DM dm,PetscInt point,const PetscScalar *array,void *ptr)
Not Collective

Input Arguments

dm - DM defining topological space
point - topological point
array - array to index into

Output Arguments

ptr - address of read reference to point data, type generic so user can place in structure

Note

A common usage when data sizes are known statically

 const struct { PetscScalar foo,bar,baz; } *ptr;

 DMPlexPointLocalRead(dm,point,array,&ptr);

 x = 2*ptr->foo + 3*ptr->bar + 5*ptr->baz;

See Also

DMGetLocalSection(), PetscSectionGetOffset(), PetscSectionGetDof(), DMPlexGetPointLocal(), DMPlexPointGlobalRead()

Level

intermediate

Location

src/dm/impls/plex/plexpoint.c

Examples

src/dm/impls/plex/tutorials/ex6.c.html
src/ts/tutorials/ex11.c.html
src/ts/tutorials/ex52.c.html

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