petsc-3.14.6 2021-03-30

DMGetCoordinatesLocalTuple

Gets a local vector with the coordinates of specified points and section describing its layout.

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetCoordinatesLocalTuple(DM dm, IS p, PetscSection *pCoordSection, Vec *pCoord)

Not collective

Input Parameter

	dm	- the DM
	p	- the IS of points whose coordinates will be returned

Output Parameter

	pCoordSection	- the PetscSection describing the layout of pCoord, i.e. each point corresponds to one point in p, and DOFs correspond to coordinates
	pCoord	- the Vec with coordinates of points in p

Note

DMGetCoordinatesLocalSetUp() must be called first. This function employs DMGetCoordinatesLocalNoncollective() so it is not collective.

This creates a new vector, so the user SHOULD destroy this vector

Each process has the local and ghost coordinates

For DMDA, in two and three dimensions coordinates are interlaced (x_0,y_0,x_1,y_1,...) and (x_0,y_0,z_0,x_1,y_1,z_1...)

Level

advanced

Location

src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages