DMPlexMarkBoundaryFaces#

Mark all faces on the boundary

Synopsis#

#include "petscdmplex.h"    
#include "petscdmlabel.h"   
PetscErrorCode DMPlexMarkBoundaryFaces(DM dm, PetscInt val, DMLabel label)

Not Collective

Input Parameters#

dm - The original DM
val - The marker value, or PETSC_DETERMINE to use some value in the closure (or 1 if none are found)

Output Parameter#

label - The DMLabel marking boundary faces with the given value

Note#

This function will use the point PetscSF from the input DM to exclude points on the partition boundary from being marked, unless the partition overlap is greater than zero. If you also wish to mark the partition boundary, you can use DMSetPointSF() to temporarily set it to NULL, and then reset it to the original object after the call.