def import_jet_mesh(world, material=None):
for mesh_item in JET_MESH:
mesh_path, default_material = mesh_item
if not material:
material = default_material
print("importing {} ...".format(os.path.split(mesh_path)[1]))
directory, filename = os.path.split(mesh_path)
mesh_name, ext = filename.split('.')
Mesh.from_file(mesh_path,
parent=world,
material=material,
name=mesh_name)
def load_vessel_world(mesh_parts, shift_p5=False):
"""Load the world containing the vessel mesh parts.
<mesh_parts> is a list of filenames containing mesh files in either
RSM or OBJ format, which are to be loaded into the world.
If shift_p5 is True, the mesh files representing the P5 coils will
have a downward shift applied to them to account for the UEP sag.
This is described in CD/MU/04783.
Returns world, the root of the scenegraph.
"""
world = World()
for path, _ in mesh_parts:
print("importing {} ...".format(os.path.split(path)[1]))
filename = os.path.split(path)[-1]
name, ext = filename.split('.')
if 'P5_' in path and shift_p5:
p5_zshift = -0.00485 # From CD/MU/04783
transform = translate(0, 0, p5_zshift)
else:
transform = None
if ext.lower() == 'rsm':
Mesh.from_file(path,
parent=world,
material=AbsorbingSurface(),
transform=transform,
name=name)
elif ext.lower() == 'obj':
import_obj(path,
parent=world,
material=AbsorbingSurface(),
name=name)
else:
raise ValueError("Only RSM and OBJ meshes are supported.")
# Add a solid cylinder at R=0 to prevent rays finding their way through the
# gaps in the centre column armour. This is only necessary for the MAST
# meshes, but it does no harm to add it to MAST-U meshes too
height = 6
radius = 0.1
Cylinder(radius=radius,
height=height,
parent=world,
transform=translate(0, 0, -height / 2),
material=AbsorbingSurface(),
name='Blocking Cylinder')
return world
def import_aug_mesh(world, material=RoughTungsten(0.29)):
"""Imports the full AUG first wall mesh with default materials.
:param str material: flag for material setting to us. 'ABSORBING' indicates
the mesh should be loaded with a perfectly absorbing surface.
"""
material = material or AbsorbingSurface()
for mesh_path in AUG_FULL_MESH:
print("importing {} ...".format(os.path.split(mesh_path)[1]))
directory, filename = os.path.split(mesh_path)
mesh_name, ext = filename.split('.')
if ext == 'rsm':
Mesh.from_file(mesh_path, parent=world, material=material, name=mesh_name)
else:
import_stl(mesh_path, parent=world, material=material, name=mesh_name, scaling=0.001)
def import_mastu_mesh(world, override_material=None, metal_material=None, lambert_material=None):
for mesh_item in MASTU_FULL_MESH:
mesh_path, default_material = mesh_item
if override_material:
material = override_material
elif metal_material and isinstance(default_material, RoughTungsten):
material = metal_material
elif lambert_material and isinstance(default_material, Lambert):
material = lambert_material
else:
material = default_material
print("importing {} ...".format(os.path.split(mesh_path)[1]))
directory, filename = os.path.split(mesh_path)
mesh_name, ext = filename.split('.')
Mesh.from_file(mesh_path, parent=world, material=material, name=mesh_name)
def import_mastu_mesh(world,
override_material=None,
metal_material=None,
lambert_material=None):
LOWER_ELM_COILS = [
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_10_LOWER.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_11_12_LOWER.rsm'),
METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_1_LOWER.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_2_3_LOWER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_4_LOWER.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_5_6_LOWER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_7_LOWER.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_8_9_LOWER.rsm'), METAL),
]
UPPER_ELM_COILS = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_11_12_UPPER.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_2_3_UPPER.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_5_6_UPPER.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/magnets/elm_coils/SECTOR_8_9_UPPER.rsm'), METAL),
]
ELM_COILS = LOWER_ELM_COILS + UPPER_ELM_COILS
PF_COILS = [
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P4_LOWER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P4_UPPER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P5_LOWER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P5_UPPER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P6_LOWER.rsm'), METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/magnets/pf_coils/P6_UPPER.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET1_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET1_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET2_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET2_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET3_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET3_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET4_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET4_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET5_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET5_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET6_lower.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_BRACKET6_upper.rsm'), METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/P4_P5_SUPPORT_BRACKETS.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/coil_armour/P5_LOWER_ARMOUR.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/coil_armour/P5_UPPER_ARMOUR.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/coil_armour/P6_LOWER_ARMOUR.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/coil_armour/P6_UPPER_ARMOUR.rsm'),
METAL),
]
VACUUM_VESSEL = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/OUTER_CYLINDER_VACUUM_VESSEL.rsm'),
METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/BOTTOM_ENDPLATE.rsm'),
METAL),
(os.path.join(CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/TOP_ENDPLATE.rsm'),
METAL),
]
BEAM_DUMPS = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/beam_dumps/BEAM_DUMP_6M.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/beam_dumps/BEAM_DUMP_8U.rsm'),
CARBON),
]
C1_TILE = [(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C1.rsm'), CARBON)]
C2_TILES = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C2_lower.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C2_upper.rsm'),
CARBON),
]
C3_TILES = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C3_lower.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C3_upper.rsm'),
CARBON),
]
C4_TILES = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C4_lower.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C4_upper.rsm'),
CARBON),
]
C5_TILES = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C5_lower.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C5_upper.rsm'),
CARBON),
]
C6_TILES = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C6_lower.rsm'),
CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/centre_column_armour/C6_upper.rsm'),
CARBON),
]
CENTRE_COLUMN = C1_TILE + C2_TILES + C3_TILES + C4_TILES + C5_TILES + C6_TILES
T1_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T1_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T1_L_13_24.rsm'
), CARBON),
]
T2_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T2_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T2_L_13_24.rsm'
), CARBON),
]
T3_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T3_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T3_L_13_24.rsm'
), CARBON),
]
T4_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T4_L_01_08.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T4_L_09_16.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T4_L_17_24.rsm'
), CARBON),
]
T5_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T5_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T5_L_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T5_L_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/lower/T5_L_37_48.rsm'
), CARBON),
]
LOWER_DIVERTOR_ARMOUR = T1_LOWER + T2_LOWER + T3_LOWER + T4_LOWER + T5_LOWER
B1_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B1_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B1_L_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B1_L_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B1_L_37_48.rsm'
), CARBON),
]
B2_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B2_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B2_L_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B2_L_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B2_L_37_48.rsm'
), CARBON),
]
B3_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B3_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B3_L_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B3_L_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B3_L_37_48.rsm'
), CARBON),
]
B4_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B4_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B4_L_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B4_L_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/B4_L_37_48.rsm'
), CARBON),
]
N1_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/N1_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/N1_L_13_24.rsm'
), CARBON),
]
N2_LOWER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/N2_L_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/lower/N2_L_13_24.rsm'
), CARBON),
]
LOWER_DIVERTOR_NOSE = B1_LOWER + B2_LOWER + B3_LOWER + B4_LOWER + N1_LOWER + N2_LOWER
LOWER_GAS_BAFFLE = [
(os.path.join(CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/GAS_BAFFLE_LOWER.rsm'),
METAL)
]
LOWER_DIVERTOR = LOWER_DIVERTOR_ARMOUR + LOWER_DIVERTOR_NOSE + LOWER_GAS_BAFFLE
T1_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T1_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T1_U_13_24.rsm'
), CARBON),
]
T2_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T2_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T2_U_13_24.rsm'
), CARBON),
]
T3_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T3_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T3_U_13_24.rsm'
), CARBON),
]
T4_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T4_U_01_08.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T4_U_09_16.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T4_U_17_24.rsm'
), CARBON),
]
T5_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T5_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T5_U_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T5_U_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/divertor_armour/upper/T5_U_37_48.rsm'
), CARBON),
]
UPPER_DIVERTOR_ARMOUR = T1_UPPER + T2_UPPER + T3_UPPER + T4_UPPER + T5_UPPER
B1_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B1_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B1_U_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B1_U_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B1_U_37_48.rsm'
), CARBON),
]
B2_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B2_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B2_U_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B2_U_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B2_U_37_48.rsm'
), CARBON),
]
B3_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B3_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B3_U_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B3_U_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B3_U_37_48.rsm'
), CARBON),
]
B4_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B4_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B4_U_13_24.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B4_U_25_36.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/B4_U_37_48.rsm'
), CARBON),
]
N1_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/N1_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/N1_U_13_24.rsm'
), CARBON),
]
N2_UPPER = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/N2_U_01_12.rsm'
), CARBON),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/vessel_armour/throat_armour/upper/N2_U_13_24.rsm'
), CARBON),
]
UPPER_DIVERTOR_NOSE = B1_UPPER + B2_UPPER + B3_UPPER + B4_UPPER + N1_UPPER + N2_UPPER
UPPER_GAS_BAFFLE = [
(os.path.join(CADMESH_PATH,
'mast/mastu-full/vacuum_vessel/GAS_BAFFLE_UPPER.rsm'),
METAL)
]
UPPER_DIVERTOR = UPPER_DIVERTOR_ARMOUR + UPPER_DIVERTOR_NOSE + UPPER_GAS_BAFFLE
MASTU_FULL_MESH = ELM_COILS + PF_COILS + VACUUM_VESSEL + BEAM_DUMPS + CENTRE_COLUMN + LOWER_DIVERTOR + UPPER_DIVERTOR
SXD_BOLOMETERS = [
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/diagnostics/DIVERTOR_horizontal_bolometer.rsm'),
METAL),
(os.path.join(
CADMESH_PATH,
'mast/mastu-full/diagnostics/DIVERTOR_verticall_bolometer.rsm'),
METAL),
]
for mesh_item in MASTU_FULL_MESH:
mesh_path, default_material = mesh_item
if override_material:
material = override_material
elif metal_material and isinstance(default_material, RoughTungsten):
material = metal_material
elif lambert_material and isinstance(default_material, Lambert):
material = lambert_material
else:
material = default_material
print("importing {} ...".format(os.path.split(mesh_path)[1]))
directory, filename = os.path.split(mesh_path)
mesh_name, ext = filename.split('.')
Mesh.from_file(mesh_path,
parent=world,
material=material,
name=mesh_name)
return world