How to update material settings using the material database from Python?

[Sylvain]

I am looking for the equivalent of "Update All Materials" in the GUI

[Sylvain]

The function you are looking for is LinkMaterialWithDatabase().

This is how you can add new material settings with properties taken from the database

import s4l_v1.document as document
import s4l_v1.model as model

sim = document.AllSimulations[0]

for ent in model.AllEntities():
	mats = sim.AddMaterialSettings([ent])
	mats.Name = ent.Name
	sim.LinkMaterialWithDatabase(mats, str(ent.MaterialName))

To modify the settings of an existing simulation and update their properties, you can do something like this:

import s4l_v1.simulation as simulation

material_settings = [s for s in sim.AllSettings if isinstance(s, simulation.fdtd.MaterialSettings)]
for mats in material_settings:
	material_name = mats.Name
	sim.LinkMaterialWithDatabase(mats, material_name)