DMPlexCoordinatesToReference#

Pull coordinates back from the mesh to the reference element using a single element map. This inversion will be accurate inside the reference element, but may be inaccurate for mappings that do not extend uniquely outside the reference cell (e.g, most non-affine maps)

Synopsis#

#include "petscdmplex.h"   
#include "petscfe.h"       
PetscErrorCode DMPlexCoordinatesToReference(DM dm, PetscInt cell, PetscInt numPoints, const PetscReal realCoords[], PetscReal refCoords[])

Not Collective

Input Parameters#

dm - The mesh, with coordinate maps defined either by a PetscDS for the coordinate DM (see DMGetCoordinateDM()) or implicitly by the coordinates of the corner vertices of the cell: as an affine map for simplicial elements, or as a multilinear map for tensor-product elements
cell - the cell whose map is used.
numPoints - the number of points to locate
realCoords - (numPoints x coordinate dimension) array of coordinates (see DMGetCoordinateDim())