PETSc version 3.15.5
DMPlexComputeCellGeometryFEM
Compute the Jacobian, inverse Jacobian, and Jacobian determinant at each quadrature point in the given cell 
Synopsis
#include "petscdmplex.h"   
#include "petscfe.h"       
PetscErrorCode DMPlexComputeCellGeometryFEM(DM dm, PetscInt cell, PetscQuadrature quad, PetscReal *v, PetscReal *J, PetscReal *invJ, PetscReal *detJ)
Collective on dm
Input Arguments
|  | dm | - the DM | 
|  | cell | - the cell | 
|  | quad | - the quadrature containing the points in the reference element where the geometry will be evaluated.  If quad == NULL, geometry will be
evaluated at the first vertex of the reference element | 
Output Arguments
|  | v | - the image of the transformed quadrature points, otherwise the image of the first vertex in the closure of the reference element | 
|  | J | - the Jacobian of the transform from the reference element at each quadrature point | 
|  | invJ | - the inverse of the Jacobian at each quadrature point | 
|  | detJ | - the Jacobian determinant at each quadrature point | 
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
 DMGetCoordinateSection(), DMGetCoordinates()
Level
advanced
Location
src/dm/impls/plex/plexgeometry.c
Examples
src/tao/tutorials/ex3.c.html
Implementations
DMPlexComputeCellGeometryFEM_Implicit in src/dm/impls/plex/plexgeometry.c
DMPlexComputeCellGeometryFEM_FE in src/dm/impls/plex/plexgeometry.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages