:orphan:
# 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
## 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
[](ch_dmbase), `DM`, `DMRefine()`, `DMCoarsen()`, `DMDestroy()`, `DMView()`, `DMCreateGlobalVector()`
## Level
developer
## Location
src/dm/interface/dm.c
## Implementations
DMExtrude_Plex in src/dm/impls/plex/plexextrude.c
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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](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)