def set_texture(target, linked, nameoftexture, scale = "1") :# If unspecified, the scale is 1
"""
Try to set a texture for the target. Returns True in case of success, or False in case of failure.
"""
if nameoftexture in linked :
if scale != "1" :
target = tools.create_obj(target, "texture", "scale")
tools.set_value(target, "float", "scale", scale)
else :
target = tools.new_obj("texture", "bitmap")
tools.set_ref(target, linked[nameoftexture])
return target
return False
def build(root, textures, links_param_revert):
"""
Creates textures with in the scene.
Return a list of texture ids.
"""
verbose = config.verbose
if verbose: print("textures_builder_fbx launched")
comment = etree.Comment("Textures with ids")
root.append(comment)
textures_id = {}
if textures != [] and not os.path.exists(config.filepath +
"export\\textures"):
os.makedirs(config.filepath + "export\\textures")
copyfile(config.curr_place + "\\missing_texture.png",
config.filepath + "export\\textures\\missing_texture.png")
# Go through all textures in the scene
for texture in textures:
id, type, obj = texture.get("value").replace("::", "").split(",")
rel_reference = texture.find("RelativeFilename").text.strip()
abs_reference = texture.find("FileName").text.strip()
properties = tools.getProperties(texture)
uoff, voff = properties["Translation"][
-3:-1] if "Translation" in properties else ["0", "0"]
uscaling, vscaling = properties["Scaling"][
-3:-1] if "Scaling" in properties else ["1", "1"]
if rel_reference == "" and abs_reference == "":
if verbose:
print("Empty reference for id " + id +
", replacing with error texture")
reference = "textures\\missing_texture.png"
# Try relative path then absolute if it did'nt work
elif not Path(config.filepath + rel_reference).is_file():
if not Path(abs_reference).is_file():
if verbose: print("Missing texture : " + rel_reference)
reference = "textures\\missing_texture.png"
else:
new_reference = "textures\\" + id + "." + abs_reference.split(
".")[-1]
copyfile(abs_reference,
config.filepath + "export\\" + new_reference)
reference = new_reference
else:
new_reference = "textures\\" + id + "." + abs_reference.split(
".")[-1]
copyfile(config.filepath + rel_reference,
config.filepath + "export\\" + new_reference)
reference = new_reference
if id not in links_param_revert:
if verbose:
print("Texture " + reference +
" never used. Not writing it to file.")
elif any(reference.lower().endswith(s)
for s in [".bmp", ".jpg", ".png", ".tga", ".exr"]):
textures_id[id] = properties
textures_id[id]["reference"] = reference
curr_texture = tools.create_obj(root, "texture", "bitmap", id)
tools.set_value(curr_texture, "string", "filename", reference)
# Avoid cluttering for the final file, removing 0 offsets and 1 scaling
if uoff != "0":
tools.set_value(curr_texture, "float", "uoffset", uoff)
if voff != "0":
tools.set_value(curr_texture, "float", "voffset", voff)
if uscaling != "1":
tools.set_value(curr_texture, "float", "uscale", uscaling)
if vscaling != "-1":
tools.set_value(curr_texture, "float", "vscale",
str(-float(vscaling)))
# Textures in 3dsmax have their v values inverted compared to mitsuba.
else:
print("Unknown texture file type : " + reference.split(".")[-1])
print("for file : " + reference)
return textures_id
def build(fbxtree):
"""
This function builds the scene from the fbx tree.
"""
verbose = config.verbose
if verbose: print("builder_fromfbx launched")
# Get information about the vertical axis used
globalsettings = tools.getProperties(fbxtree.find("GlobalSettings"))
config.upvector = "0 1 0" if globalsettings["UpAxis"][
-1] == "1" else "0 0 1"
objects = fbxtree.find("Objects")
# Separate objects into different categories
models = objects.findall("Model")
geometries = objects.findall("Geometry")
materials = objects.findall("Material")
nodes = objects.findall(
"NodeAttribute") # Contains some cameras and lights properties
# videos = objects.findall("Video") # Not sure about what it contains, it seems to be a duplicate of “textures”. Maybe for compatibility reasons ?
textures = objects.findall("Texture")
nulls = objects.findall("Null") # Useful for cameras and spot targets
""" Useless for now
# Animation. Will probably not be usable
anim_c_n = objects.findall("AnimationCurveNode")
anim_c = objects.findall("AnimationCurve")
# Maybe useful. Not sure what to do with this.
implem = objects.find("Implementation")
bind_table= objects.find("BindingTable")
bind_oper = objects.find("BindingOperator")
"""
# Useful to link objects, textures to materials, materials to models, and geometry to models.
connections_list = fbxtree.find("Connections")
comments = connections_list.findall("comment")
links = connections_list.findall("C")
# Stocking links between objects.
# Links simple and links revert are simple links, for example for hierarchies of objects.
# Links param and links param revert are for parameters, for example, a texture referenced by a material.
links_simple, links_revert, links_param, links_param_revert = tools.extract_links(
links)
root = etree.Element("scene")
root.set("version", "0.5.0")
# Set up the integrator. I chose pathtracing by default TODO add as a parameter
tools.create_obj(root, "integrator", "path")
if not os.path.exists(config.filepath + "export"):
os.makedirs(config.filepath + "export")
# All the functions will directly add their elements to the root element
light_cam_builder.build(root, nodes, models, nulls, links_simple,
links_param)
textures_id = textures_builder.build(root, textures, links_param_revert)
materials_ids = materials_builder.build(root, materials, textures_id,
links_param, links_param_revert)
shapes_ids = shapes_builder.build(root, geometries, materials_ids,
links_simple, links_revert)
models_builder.build(root, models, links_simple, links_revert, shapes_ids)
if verbose: print("Writing to file…")
with open(config.filepath + "export\\" + config.filename + ".xml",
"w",
encoding="utf8") as outputfile:
if verbose: print("prettifying… (Can take a while for big files)")
stringout = tools.prettifyXml(etree.tostring(root).decode())
if verbose: print("writing…")
outputfile.write(stringout)
def build(root, geometries, materials_ids, links_simple, links_revert):
"""
Exports all the geometry into a folder for later use in the scene.
Return a list of ids for the geometry
"""
if config.verbose: print("shapes_builder_fbx launched")
savepath = config.filepath + "export\\meshes\\"
if not os.path.exists(savepath):
os.makedirs(savepath)
comment = etree.Comment("Shapes.")
root.append(comment)
geometries_id = []
# Only keep geometries with polygonvertex
geometries = [
geometry for geometry in geometries
if geometry.find("PolygonVertexIndex") != None
]
for geometry in geometries:
id, type, obj = geometry.get("value").replace("::", "").split(", ")
if obj != "Mesh":
print("Unknown Geometry obj : " + obj + " (id=" + id + ")")
geometries_id.append(id)
if id not in links_revert:
if verbose:
print("Model " + id + " never used. Not writing it to file.")
else:
properties = tools.getProperties(geometry)
linked_materials = links_revert[id] if id in links_revert else [
] # Get the model(s) containing this geometry (Only the models reference materials)
if len(linked_materials) == 1:
linked_materials = links_simple[linked_materials[0]]
else:
print("Multiple models containing geometry " + id + " ???")
linked_materials = []
linked_materials = [
link for link in linked_materials if link in materials_ids
] #Only keep ids of materials
# I think that the index for materials is based on the order they appear in the file
# Maybe not, but i see no other info in the fbx to know that, so that's what i use and it seems to work
vertices_data = geometry.find("Vertices")
nb_vertices = int(vertices_data.get("value").replace("*", ""))
polygons_data = geometry.find("PolygonVertexIndex")
nb_poly_ind = int(polygons_data.get("value").replace("*", ""))
edges_data = geometry.find("Edges")
nb_edges = int(edges_data.get("value").replace("*", ""))
normal_layer = geometry.find("LayerElementNormal")
if normal_layer != None:
normals_data = normal_layer.find("Normals")
normalsW_data = normal_layer.find("NormalsW")
nb_normals = int(normals_data.get("value").replace("*", ""))
nb_normalsW = int(normalsW_data.get("value").replace("*", ""))
uv_layer = geometry.find("LayerElementUV")
if uv_layer != None:
uv_data = uv_layer.find("UV")
uv_index_data = uv_layer.find("UVIndex")
nb_uv_data = int(uv_data.get("value").replace("*", ""))
nb_uv_index = int(uv_index_data.get("value").replace("*", ""))
material_layer = geometry.find("LayerElementMaterial")
if material_layer != None:
material_data = list(
map(
int,
material_layer.find("Materials").find("a").text.split(
",")))
if material_layer.find(
"MappingInformationType").text == "AllSame":
material_data = nb_poly_ind * [material_data[0]]
vertices_in = [
tools.str2float2str(num)
for num in vertices_data.find("a").text.split(",")
]
polygons_in = list(
map(int,
polygons_data.find("a").text.split(",")))
edges_in = [
tools.str2float2str(num)
for num in edges_data.find("a").text.split(",")
]
normals_in = [
tools.str2float2str(num)
for num in normals_data.find("a").text.split(",")
]
normalsW_in = [
tools.str2float2str(num)
for num in normalsW_data.find("a").text.split(",")
]
uv_in = [
tools.str2float2str(num)
for num in uv_data.find("a").text.split(",")
]
uv_index_in = list(
map(int,
uv_index_data.find("a").text.split(",")))
vertices, polygon_vertex_index, normals, uv = [], [], [], []
if nb_vertices % 3 != 0:
print("Points values not a multiple of 3 !")
for i in range(int(nb_vertices / 3)):
vertices.append(vertices_in[3 * i:3 * i + 3])
curr_vertex = []
for index in polygons_in:
if index < 0:
curr_vertex.append(-index - 1)
polygon_vertex_index.append(curr_vertex)
curr_vertex = []
else:
curr_vertex.append(index)
nb_polygons = len(polygon_vertex_index)
if normal_layer != None:
normal_type = normal_layer.find(
"ReferenceInformationType").text
if normal_type == "Direct":
for i in range(int(nb_normals / 3)):
normals.append(normals_in[3 * i:3 * i + 3])
elif normal_type == "IndexToDirect":
# TODO
print("NORMAL INDEXTODIRECT DOESN'T WORK RIGHT NOW")
else:
print(
"Unknown ReferenceInformationType for normal in obj " +
id)
else:
print("NO NORMALS for object with id " + id)
if uv_layer != None:
uv_type = uv_layer.find("ReferenceInformationType").text
if uv_type == "Direct":
for i in range(int(nb_uv_data / 2)):
uv.append(uv_in[2 * i:2 * i + 2])
elif uv_type == "IndexToDirect":
for i in range(int(nb_uv_index)):
index = uv_index_in[i]
uv.append(uv_in[2 * index:2 * index + 2])
else:
print("Unknown ReferenceInformationType for uv in obj " +
id)
uv = ["0 0"] * nb_poly_ind
else:
if config.verbose:
print("No uv for object with id " + id +
". Using default of 0, 0")
uv = ["0 0"] * nb_poly_ind
materials = geometry.find("LayerElementMaterial")
if materials != None:
materials = list(
map(int,
materials.find("Materials").find("a").text.split(",")))
if materials == None or len(materials) <= 1:
materials = [0 for i in range(nb_polygons)]
max_material = max(materials)
# The shapegroup will contain all meshes with different materials, and allow instanciation
shapegroup = tools.create_obj(root, "shape", "shapegroup", id)
# Initialize
for i in range(max_material + 1):
vertex_text = []
poly_index = []
total_index = 0
curr_polygon_vertex_num = 0
for j in range(len(polygon_vertex_index)):
vertex_indexes = polygon_vertex_index[j]
curr_poly_index = []
for k in range(len(vertex_indexes)):
# Only keep polygons with the current material
if material_layer == None or material_data[j] == i:
curr_poly_index.append(str(total_index))
total_index += 1
vertex_index = vertex_indexes[k]
curr_vertex_text = " ".join(
vertices[vertex_index]) + " "
curr_vertex_text += " ".join(
normals[curr_polygon_vertex_num]) + " "
curr_vertex_text += " ".join(
uv[curr_polygon_vertex_num])
vertex_text.append(curr_vertex_text)
curr_polygon_vertex_num += 1
# Generate multiple triangle to replace polygons (not supported by Mitsuba Renderer)
if len(curr_poly_index) > 3:
for k in range(len(curr_poly_index) - 2):
curr_poly = [curr_poly_index[0]
] + curr_poly_index[k + 1:k + 3]
poly_index.append(curr_poly)
elif len(curr_poly_index) > 0:
poly_index.append(curr_poly_index)
if vertex_text != []: # Export only non-empty objects
output = open(savepath + id + "_" + str(i) + ".ply", "w")
output.write("ply\n")
output.write("format ascii 1.0\n")
output.write("element vertex " + str(len(vertex_text)) +
"\n")
output.write("""property float32 x
property float32 y
property float32 z
property float32 nx
property float32 ny
property float32 nz
property float32 u
property float32 v
""")
output.write("element face " + str(len(poly_index)) + "\n")
output.write("property list uint8 int32 vertex_indices\n")
output.write("end_header\n")
for vert in vertex_text:
output.write(vert + "\n")
for poly in poly_index: # Only triangles
output.write("3 " + " ".join(poly) + "\n")
shape = tools.create_obj(shapegroup, "shape", "ply")
tools.set_value(shape, "string", "filename",
"meshes/" + id + "_" + str(i) + ".ply")
try:
tools.set_value(shape, "ref", "bsdf",
linked_materials[i])
except IndexError:
if config.verbose:
print("No material found for object " + id +
", index " + str(i))
return geometries_id
def build(root, nodes, models, nulls, links_simple, links_param):
"""
Creates lights and cameras in the scene
"""
verbose = config.verbose
debug = config.debug
if verbose: print("lightsandcameras_builder_fbx launched")
comment = etree.Comment("Lights and cameras")
root.append(comment)
# Prepare nodes properties referenced by id for easy access
camera_nodes, light_nodes = {}, {}
for node in nodes:
id, type, obj = node.get("value").replace("::", "").split(", ")
properties = tools.getProperties(node)
# named by id to find easily when needed
node.tag = id
if obj == "Camera":
camera_nodes[id] = properties
elif obj == "Light":
light_nodes[id] = properties
# Prepare models properties referenced by id for easy access
camera_models, light_models, null_models = {}, {}, {}
for model in models:
id, type, obj = model.get("value").replace("::", "").split(", ")
properties = tools.getProperties(model)
# named by id to find easily when needed
node.tag = id
if obj == "Camera":
camera_models[id] = properties
elif obj == "Light":
light_models[id] = properties
elif obj == "Null":
null_models[id] = properties
# Lights
# Every light placed in the scene is referenced by a model.
# This model should be linked to a node containing all the light's properties.
# Once we retrieved it, we are able to create the light correctly
for id, light_model in light_models.items():
if len(links_simple[id]) != 1:
print("light_cam_builder_fbx : " + len(links_simple[id]) +
" node(s) for light model " + id)
light_node = light_nodes[links_simple[id][0]]
light_is_a_spot = "LookAtProperty" in links_param[
id] # LightType is present when the light has a target
if "3dsMax|FSphereExtParameters|light_radius" in light_node: # This parameter means that the light is a sphere
light_is_a_sphere = True
sphere_radius = float(
light_node["3dsMax|FSphereExtParameters|light_radius"][-1])
else:
light_is_a_sphere = False
# This is a mess. TODO clean all this, it's not legible
if "3dsMax|FAreaParameters" in light_node: #TODO area lights
print("Area lights not supported yet, light with id " + id +
"will be considered as a point light for now")
colors = light_node["Color"][-3:] if "Color" in light_node else [
"1", "1", "1"
]
elif light_node["3dsMax|" + (
("T" if light_is_a_spot else "F") +
("Sphere" if light_is_a_sphere else "Point") + "Parameters") +
"|useKelvin"][-1] == "1":
colors = tools.kelvin2rgb(
float(light_node["3dsMax|" +
("FSphereParameters" if light_is_a_sphere else
"FPointParameters") + "|kelvin"][-1]))
# TODO color filter
else:
colors = light_node["Color"][-3:] if "Color" in light_node else [
"1"
]
# Divide intensity by apparent surface of the sphere (disc) if it's not a point
intensity = float(light_node["Intensity"][-1]) / (
2. * math.pi * sphere_radius**2. if light_is_a_sphere else 1)
rvb = []
for color in colors:
rvb.append(str(intensity * float(color)))
if light_is_a_sphere:
light_shape = tools.create_obj(root, "shape", "sphere")
tools.set_value(light_shape, "float", "radius", str(sphere_radius))
light = tools.create_obj(
parent=light_shape if light_is_a_sphere else root,
object="emitter",
type="spot"
if light_is_a_spot else "area" if light_is_a_sphere else "point")
tools.set_value(
light, "spectrum", "radiance" if light_is_a_sphere
and not light_is_a_spot else "intensity", " ".join(rvb))
if light_is_a_spot:
# angles are divided by 2 because 3dsMax expresses the total angle, and mitsuba the angle from the center of the ray
tools.set_value(light, "float", "cutoffAngle",
str(.5 * float(light_node["OuterAngle"][-1])))
tools.set_value(light, "float", "beamWidth",
str(.5 * float(light_node["InnerAngle"][-1])))
tools.transform_lookat(
light, " ".join(light_model["Lcl Translation"][-3:]),
" ".join(null_models[links_param[id]["LookAtProperty"]]
["Lcl Translation"][-3:]))
else:
tools.transform_object(light_shape if light_is_a_sphere else light,
light_model)
# Handle cameras
for id, camera_model in camera_models.items():
if len(links_simple[id]) != 1:
print("light_cam_builder_fbx : " + str(len(links_simple[id])) +
" node(s) for camera model " + id)
camera_node = camera_nodes[links_simple[id][0]]
curr_camera = tools.create_obj(root, "sensor", "perspective")
curr_film = tools.create_obj(curr_camera, "film", "hdrfilm")
tools.set_value(curr_film, "integer", "width",
camera_node["AspectWidth"][-1])
tools.set_value(curr_film, "integer", "height",
camera_node["AspectHeight"][-1])
rfilter = tools.create_obj(curr_film, "rfilter", "box")
# Set up with nice values. TODO parameters to control this
curr_sampler = tools.create_obj(curr_camera, "sampler", "ldsampler")
tools.set_value(curr_sampler, "integer", "sampleCount", "64")
tools.transform_lookat_from_properties(curr_camera, camera_node)
tools.set_value(curr_camera, "float", "fov",
camera_node["FieldOfView"][-1])
tools.set_value(curr_camera, "string", "fovAxis",
"x") # Max expresses the horizontal fov
def build(root, materials, textures_id, links_param, links_param_revert):
"""
Creates materials with ids in the scene.
Returns a list of materials id.
"""
if config.verbose : print("materials_builder_fbx launched")
comment = etree.Comment("Materials with ids")
root.append(comment)
material_ids = []
for material in materials :
id, type, obj = material.get("value").replace("::","").split(",")
material_ids.append(id)
# Get linked parameters (only textures ?)
linked = links_param[id] if id in links_param else []
properties = tools.getProperties(material)
diffuse_color =(" ".join(properties["Diffuse"][-3:]) if "Diffuse" in properties
else(" ".join(properties["DiffuseColor"][-3:]) if "DiffuseColor" in properties else "1 0 0")) #Use red if there is no diffuse, for debug
specular_color = " ".join(properties["Specular"][-3:]) if "Specular" in properties else "1 1 1"
shininess = properties["ShininessExponent"][-1] if "ShininessExponent" in properties else ""
# If bumpmap is on, use it
if ("3dsMax|Parameters|bump_map" in linked) :# Use bump map
scale = properties["3dsMax|Parameters|bump_map_amt"][-1]
curr_bumpmod = tools.create_obj(root, "bsdf", "bumpmap", id)
set_texture(curr_bumpmod, linked, "3dsMax|Parameters|bump_map", scale)
curr_material = etree.SubElement(curr_bumpmod, "bsdf")
else :
curr_material = etree.SubElement(root, "bsdf")
curr_material.set("id", id)
# Roughness
if "3dsMax|Parameters|roughness" in properties :
if "3dsMax|Parameters|roughness_map" in linked : # Use a texture
inverted_roughness = properties["3dsMax|Parameters|roughness_inv"][-1] == "1"
texture_properties = textures_id[linked["3dsMax|Parameters|roughness_map"]]
filename = texture_properties["reference"].replace("\\","/").split("/")[-1]
roughness_reference = tools.roughness_convert(filename, inverted_roughness)
uoff, voff = texture_properties["Translation"][-3:-1] if "Translation" in texture_properties else ["0", "0"]
uscaling, vscaling = texture_properties["Scaling"] [-3:-1] if "Scaling" in texture_properties else ["1", "1"]
# Create a new texture
curr_roughness = tools.new_obj("texture", "bitmap")
curr_roughness.set("name", "alpha")
# Avoid cluttering for the final file, removing 0 offsets and 1 scaling
if uoff != "0" : tools.set_value(curr_roughness, "float", "uoffset", uoff)
if voff != "0" : tools.set_value(curr_roughness, "float", "voffset", voff)
if uscaling != "1" : tools.set_value(curr_roughness, "float", "uscale", uscaling)
if vscaling !="-1" : tools.set_value(curr_roughness, "float", "vscale", str(-float(vscaling)))
tools.set_value(curr_roughness, "string", "filename", roughness_reference)
else : # Use a value
roughness = .5*float(properties["3dsMax|Parameters|roughness"][-1])
if roughness == 0 :
curr_roughness = None
else :
curr_roughness = etree.Element("float")
curr_roughness.set("name", "alpha")
curr_roughness.set("value", str(roughness))
else :
curr_roughness = None
# Based on this blog post : https://simonstechblog.blogspot.com/2011/12/microfacet-brdf.html
# √(2/(α+2))
# But divided by 2, because of mitsuba's roughness scale
roughness = .5 * (2./(float(shininess)+2.)) ** (.5)
curr_roughness = etree.Element("float")
curr_roughness.set("name", "alpha")
curr_roughness.set("value", str(roughness))
# Specular transmittance
if "3dsMax|Parameters|transparency" in properties and float(properties["3dsMax|Parameters|transparency"][-1]) > 0 :
transp = 1 - float(properties["3dsMax|Parameters|transparency"][-1])
transp_color = " ".join(properties["3dsMax|Parameters|trans_color"][-4:-1])
curr_material.set("type", "blendbsdf")
tools.set_value(curr_material, "float", "weight", str(transp))
# Transparent material for the blend
curr_transp = tools.create_obj(curr_material, "bsdf", "roughdielectric")
tools.set_value(curr_transp, "string", "distribution", config.distrib)
tools.set_value(curr_transp, "spectrum", "specularTransmittance", transp_color)
tools.set_value(curr_transp, "float", "alpha", properties["3dsMax|Parameters|trans_roughness"][-1])
if "3dsMax|Parameters|trans_ior" in properties :
tools.set_value(curr_transp, "float", "intIOR", properties["3dsMax|Parameters|trans_ior"][-1])
# Non-transparent part of the material
curr_material = etree.SubElement(curr_material, "bsdf")
# Metalness
metalness = float(properties["3dsMax|Parameters|metalness"][-1]) if "3dsMax|Parameters|metalness" in properties else 0
if metalness > 0 :
if metalness < 1 :
curr_material.set("type", "blendbsdf")
tools.set_value(curr_material, "float", "weight",
str(1 - float(properties["3dsMax|Parameters|metalness"][-1])))# 1 - Metalness
curr_metal = tools.create_obj(curr_material, "bsdf", "roughconductor" if curr_roughness != None else "conductor")
else :
curr_material.set("type", "roughconductor" if curr_roughness != None else "conductor")
curr_metal = curr_material
# Metal part of the material
tools.set_value(curr_metal, "string" , "distribution", config.distrib)
if curr_roughness != None :
curr_metal.append(curr_roughness)
tools.set_value(curr_metal, "string" , "material" , "none") # Perfect mirror, the color is set via specularReflectance.
# Copy-paste from diffuse, this is what 3dsmax uses
if "DiffuseColor" in linked :# Use a texture
tools.set_value(curr_metal, "ref", "specularReflectance", linked["DiffuseColor"])
elif "3dsMax|Parameters|base_color_map" in linked :
tools.set_value(curr_metal, "ref", "specularReflectance", linked["3dsMax|Parameters|base_color_map"])
elif diffuse_color != "1 1 1":
tools.set_value(curr_metal, "spectrum", "specularReflectance", diffuse_color)
# else it's the default of 1 1 1
# Non-metal part of the material
if metalness < 1 : curr_material = etree.SubElement(curr_material, "bsdf")
# Non transmitting and non-metal part of the material. Only if metalness < 1
if metalness < 1 :
curr_material.set("type", "phong" if config.closest else ("roughplastic" if curr_roughness != None else "plastic"))
tools.set_value(curr_material, "string", "distribution", config.distrib)
# keep the original diffuse independantly of ior.
if config.realist :
tools.set_value(curr_material, "boolean", "nonlinear", "true")
if "DiffuseColor" in linked :# Use a texture
tools.set_value(curr_material, "ref", "diffuseReflectance", linked["DiffuseColor"])
elif "3dsMax|Parameters|base_color_map" in linked :
tools.set_value(curr_material, "ref", "diffuseReflectance", linked["3dsMax|Parameters|base_color_map"])
else :
tools.set_value(curr_material, "spectrum", "diffuseReflectance", diffuse_color)
if specular_color != "1 1 1" : # Set up only if there is such a color
curr_spec_color = etree.SubElement(curr_material, "spectrum")
curr_spec_color.set("name", "specularReflectance")
curr_spec_color.set("value", specular_color)
if "3dsMax|Parameters|coat_ior" in properties :
ior = properties["3dsMax|Parameters|coat_ior"][-1]
tools.set_value(curr_material, "float", "intIOR", ior)
if config.closest and shininess != "" :
tools.set_value(curr_material, "float", "exponent", shininess)
elif curr_roughness != None :
curr_material.append(curr_roughness)
return material_ids