:orphan:
# DMPolytopeGetOrientation
Determine an orientation (transformation) that takes the source face arrangement to the target face arrangement
## Synopsis
```
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMPolytopeGetOrientation(DMPolytopeType ct, const PetscInt sourceCone[], const PetscInt targetCone[], PetscInt *ornt)
```
Not Collective
## Input Parameters
- ***ct -*** The `DMPolytopeType`
- ***sourceCone -*** The source arrangement of faces
- ***targetCone -*** The target arrangement of faces
## Output Parameter
- ***ornt -*** The orientation (transformation) which will take the source arrangement to the target arrangement
## Note
This function is the same as `DMPolytopeMatchOrientation()` except it will generate an error if no suitable orientation can be found.
## Developer Note
It is unclear why this function needs to exist since one can simply call `DMPolytopeMatchOrientation()` and error if none is found
## See Also
[](ch_dmbase), `DM`, `DMPolytopeType`, `DMPolytopeMatchOrientation()`, `DMPolytopeGetVertexOrientation()`, `DMPolytopeMatchVertexOrientation()`
## Level
advanced
## Location
src/dm/interface/dm.c
## Examples
src/dm/impls/plex/tutorials/ex11.c
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