Mesh Index of a Given Finite Element Object

[FH-9]

Hi,

Given a FiniteElement object is it possible to infer its index in the mesh? I am writing a custom AssembleElementVector method that takes as an argument a FiniteElement object. However, I also need to access that element's neighbors for my application. I know how to do this if I am iterating over the elements in the mesh myself but not when I am just given a FiniteElement object. I would appreciate any pointers. Thank you very much.

[tzanio]

Do you mean FiniteElement or Element?

For the latter, you can consider encoding the element number as its attribute.

[pazner]

In AssembleElementVector, the given ElementTransformation has public member data ElementTransformation::ElementNo. This will correspond to the index of the given element. You can then use that information to find the neighbors.

[FH-9]

Hi @tzanio and @pazner,

Yes, I figured that out a little after posting this question :) Thanks nonetheless and apologies for a hasty question.

In AssembleElementVector, the given ElementTransformation has public member data ElementTransformation::ElementNo. This will correspond to the index of the given element. You can then use that information to find the neighbors.