Identifying EB nodes when using STL

[AlexGlock]

Hi warpx team,

I using the picmi.EmbeddedBoundary class to represent some electrodes in my simulation domain. However, I still need to check if a couple of node are within the elctrodes or not. Is there an option to access/query an underlying implicit function even though I initialized from an STL or do I have to create my own implicit function with the STL using a package like trimesh?

As always many thanks in advance.
Cheers,
Alex