petsc-3.8.4 2018-03-24

DMPlexFilter

Extract a subset of mesh cells defined by a label as a separate mesh

#include "petscdmplex.h"    
#include "petscdmlabel.h"   
PetscErrorCode DMPlexFilter(DM dm, DMLabel cellLabel, PetscInt value, DM *subdm)

	dm	- The original mesh
	cellLabel	- The DMLabel marking cells contained in the new mesh
	value	- The label value to use

subdm -The new mesh

Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().