# DMExtrude
Extrude a `DM` object from a surface 
## Synopsis
```
#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMExtrude(DM dm, PetscInt layers, DM *dme)
```
Collective on dm


## Input Parameters

- ***dm     -*** the `DM` object
- ***layers -*** the number of extruded cell layers



## Output Parameter

- ***dme -*** the extruded `DM`, or NULL



## Note
If no extrusion was done, the return value is NULL




## See Also
 `DMRefine()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/interface/dm.c.html#DMExtrude">src/dm/interface/dm.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexextrude.c.html#DMExtrude_Plex">DMExtrude_Plex in src/dm/impls/plex/plexextrude.c</A><BR>


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


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