:orphan:
# DMAdaptationCriterion
Describes the test used to decide whether to coarsen or refine parts of the mesh 
## Synopsis
```
typedef enum {
  DM_ADAPTATION_NONE,
  DM_ADAPTATION_REFINE,
  DM_ADAPTATION_LABEL,
  DM_ADAPTATION_METRIC
} DMAdaptationCriterion;
```

## Values

- ***`DM_ADAPTATION_REFINE` -*** uniformly refine a mesh, much like grid sequencing
- ***`DM_ADAPTATION_LABEL` -*** adapt the mesh based upon a label of the cells filled with `DMAdaptFlag` markers.
- ***`DM_ADAPTATION_METRIC` -*** try to mesh the manifold described by the input metric tensor uniformly. PETSc can also construct such a metric based
upon an input primal or a gradient field.
- ***`DM_ADAPTATION_NONE` -*** do no adaptation





## See Also
 `DM`, `DMAdaptor`, `DMAdaptationStrategy`, `DMAdaptorSolve()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscdmtypes.h.html#DMAdaptationCriterion">include/petscdmtypes.h</A>


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