[petsc-users] Creating DMPlex from the subsection of a DM

[Vilmer Dahlberg]

Dear PETSc dev team,

I am working on an application which makes use of DMPlex. I would like to extract a subsection of the dm based on some field metric defined on its vertices or cells. I am using DMLabel to mark my boundary conditions and would like the child mesh to retain some of the labels. Is there a simple way of doing this? I could spend some time writing my own implementation, looping over cells and building a new DM from scratch or using something like DMPlexBuildFromCellListParallel, but I feel like there should exist a solution. Could you point me in the right direction?

Thanks in advance!

Best,
Vilmer
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