Direction of RWG basis function in bempp

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1

Hi all,

To correlate RWG elements in bempp and in my own code, I’m interested in the order and direction of RWG basis function in bempp. As I can see, order of RWG elements is similar to the order of edges in grid.edges array, skipping grid.edge_on_boundary. But what is direction? By direction I mean the knowledge about positive and negative grid elements for each RWG basis function.

Could you pleas clarify this question?

2

Hi, this is difficult. It is very much an implementational detail depending on the chosen numbering of nodes and how edges are iterated through. To see how this is done I would suggest you have a look in the corresponding maxwell implementation within the files in the space module. It is not too long and should be relatively straight forward to understand.

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