DMForestSetAdaptivityForest#

During the pre-setup phase, set the forest from which the current forest will be adapted (e.g., the current forest will be refined/coarsened/repartitioned from it) in DMSetUp(). Usually not needed by users directly: DMForestTemplate() constructs a new forest to be adapted from an old forest and calls this routine.

Synopsis#

#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMForestSetAdaptivityForest(DM dm, DM adapt)

Logically Collective

Input Parameters#

dm - the new forest, which will be constructed from adapt
adapt - the old forest

Note#

This can be called after setup with adapt = NULL, which will clear all internal data related to the adaptivity forest from dm. This way, repeatedly adapting does not leave stale DM objects in memory.