[SanFer]

Hi all!

This is probably a question many UDFs developers have posed themselves.

When accessing to mesh-related variables or attempting to modify them (dynamic mesh, etc.) is recurrent to use the strategy of storing the data, i.e., the Cartesian coordinates of a collection of nodes, and then change or access them in subsequent runs. For doing this, it is necessary some information to access unambiguously this data, such as ID numbers.

I can share the information I know so far:

- Node structures (Node *v) have to fields, ID (v->id) and INDEX (v->idx), that identify each node. Nevertheless, I am not sure if it is possible to access the node pointer directly from this ID number. In serial, it does not seem to work.

- Node structures can be accessed by knowing the thread (Thread *tf), face global index (fave_t f) and node local index (int n) : v = F_NODE(f,tf,n). This works great in serial, but in parallel the face numbering changes, so every node renames their interior faces. f = 635 in serial becomes f= 45 in its compute node (this can be checked using if PRINCIPAL_FACE_P(f,tf)).

So, does anybody here know some way, function or data stored elsewhere that can be used to avoid this ambiguity? I am sure it will be really helpful.

Thank you !

Emilio