PETSc version 3.16.5
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# DMPlexComputeCellGeometryAffineFEM

Assuming an affine map, compute the Jacobian, inverse Jacobian, and Jacobian determinant for a given cell

### Synopsis

    #include "petscdmplex.h"
    #include "petscfe.h"
    PetscErrorCode DMPlexComputeCellGeometryAffineFEM(DM dm, PetscInt cell, PetscReal *v0, PetscReal *J, PetscReal *invJ, PetscReal *detJ)

Collective on dm

### Input Parameters

| dm | - the DM
| cell | - the cell

### Output Parameters

| v0 | - the translation part of this affine transform
| J | - the Jacobian of the transform from the reference element
| invJ | - the inverse of the Jacobian
| detJ | - the Jacobian determinant

### Fortran Notes

Since it returns arrays, this routine is only available in Fortran 90, and you must include petsc.h90 in your code.

### See Also

DMPlexComputeCellGeometryFEM(), DMGetCoordinateSection(), DMGetCoordinates()

### Level

advanced

### Location

src/dm/impls/plex/plexgeometry.c

### Examples

src/dm/impls/plex/tutorials/ex3f90.F90.html
Index of all DMPLEX routines
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