:orphan:
# DMForestSetTopology
Set the topology of a `DMFOREST` during the pre-setup phase.  The topology is a string (e.g. "cube", "shell") and can be interpreted by subtypes of `DMFOREST`) to construct the base DM of a forest during `DMSetUp()`. 
## Synopsis
```
#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMForestSetTopology(DM dm, DMForestTopology topology)
```
Logically collectiv


## Input parameters

- ***dm -*** the forest
- ***topology -*** the topology of the forest





## See Also
 `DM`, `DMFOREST`, `DMForestGetTopology()`, `DMForestSetBaseDM()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/forest/forest.c.html#DMForestSetTopology">src/dm/impls/forest/forest.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/forest/forest.c)


[Index of all DMForest routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)