Create a mesh from a surface

Hello everyone,
I’m just beginning to learn dynamo and I can’t get any further with my problem. Maybe someone of you has an idea:
I want to create a “roof” which has the characteristics of a membrane (for example a ptfe membrane), so I need it to hang down because of gravity and its own weight. I thought I can do it with the meshtoolkit. But how can I create a mesh with the form of my surface?
Here is my code so far:


You mean something like this?

This little clip is about pressure inside a volume and how it influences the shape of the volume, but there is a gravity module also

If so check the DynaShape package