def window_material_by_name(material_name):
"""Get an window material from the library given the material name.
Args:
material_name: A text string for the name of the material.
"""
try: # see if the material has already been loaded to a Python object
return _idf_window_materials[material_name]
except KeyError: # material likely needs to be loaded from standards data
try:
_mat_dict = _window_standards_dict[material_name]
except KeyError: # material is nowhere to be found; raise an error
raise ValueError(
'"{}" was not found in the window energy material library.'.
format(material_name))
# create the Python object from the standards gem dictionary
if _mat_dict['material_type'] == 'StandardGlazing':
_mat_obj = EnergyWindowMaterialGlazing.from_standards_dict(_mat_dict)
elif _mat_dict['material_type'] == 'SimpleGlazing':
_mat_obj = EnergyWindowMaterialSimpleGlazSys.from_standards_dict(
_mat_dict)
elif _mat_dict['material_type'] == 'Gas':
_mat_obj = EnergyWindowMaterialGas.from_standards_dict(_mat_dict)
else:
raise ValueError(
'Standards gem material type "{}" is not recognized.'.format(
_mat_dict['material_type']))
_mat_obj.lock()
_idf_window_materials[
material_name] = _mat_obj # next time, it will be loaded faster
return _mat_obj
def test_gas_to_from_standards_dict():
"""Test initialization of EnergyWindowMaterialGas objects from standards gem."""
standards_dict = {
"name": "AIR 13MM",
"material_type": "Gas",
"thickness": 0.5,
"gas_type": "Air"
}
mat_1 = EnergyWindowMaterialGas.from_standards_dict(standards_dict)
assert mat_1.name == 'AIR 13MM'
assert mat_1.thickness == pytest.approx(0.0127, rel=1e-2)
assert mat_1.gas_type == 'Air'
