update

Some progress with debugging and interface, and with a pre-specified material library.
I've left comments in the code and in pink boxes on the grasshopper workspace.

Re. adjusting material mid simulation: adding self.materialName to the Bending class would be a quick really to do this, as we could use the name to map the right materials onto the bendings.  I know that there are more elegant ways to do this, but i think speed should have the priority here!

best, pn