Good Afternoon,
Is there a structure within PETSc that allows storage of a value using a triple
similar to PetscHMapIJSet with the key using a struct{PetscScalar i, j, k;}?
I'm trying to access mesh information (the shape function coefficients I will
calculate prior to their use) who's values I want to store in the auxiliary
array available in the Residual Functions of PETSc's FEM infrastructure. After
some trial and error work, I've come to the realization that the coordinates
(x[]) available in the auxiliary functions is the centroid of the cell/element
currently being evaluated. This triplet is unique for each cell/element for a
valid mesh so I think it's reasonable to use this triplet as a key for looking
up stored values unique to each cell/element. My plan is to attached the map to
the Application Context, also available to Auxiliary Functions, to enable these
calculations.
Does such a map infrastructure exist within PETSc? If so, could you point me to
a reference for it? If not, does anyone have any suggestions on how to solve
this problem?
Thank you in advance for your time.
Brandon Denton
