Apply a geometry node on each face of a geometry

Hello,

I hope I can describe my problem clearly.

It can be assumed that all surfaces consist of four points.
I would like to apply my own written Geometry Node to each face of a Geometry. This means that I want to select one face per run and also determine the center of the highest and lowest edge of this area.

Unfortunately, I’m not very familiar with the mechanics of Geometry Nodes. Maybe I’m thinking a bit too much with normal programming languages.

Is it possible?

Thank you in advance and best regards
Erksen

Seems like you can get more info on this at https://blenderartists.org/ ?

For questions about how to use Blender, ask on one of the community forums.