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# Copyright 2018-2021 The glTF-Blender-IO authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import bpy
from io_scene_gltf2.io.com import gltf2_io
from io_scene_gltf2.blender.exp import gltf2_blender_gather_texture_info, gltf2_blender_search_node_tree
from io_scene_gltf2.blender.exp import gltf2_blender_get
from io_scene_gltf2.blender.exp.gltf2_blender_gather_cache import cached
from io_scene_gltf2.io.exp.gltf2_io_user_extensions import export_user_extensions
@cached
def gather_material_pbr_metallic_roughness(blender_material, orm_texture, export_settings):
if not __filter_pbr_material(blender_material, export_settings):
return None
material = gltf2_io.MaterialPBRMetallicRoughness(
base_color_factor=__gather_base_color_factor(blender_material, export_settings),
base_color_texture=__gather_base_color_texture(blender_material, export_settings),
extensions=__gather_extensions(blender_material, export_settings),
extras=__gather_extras(blender_material, export_settings),
metallic_factor=__gather_metallic_factor(blender_material, export_settings),
metallic_roughness_texture=__gather_metallic_roughness_texture(blender_material, orm_texture, export_settings),
roughness_factor=__gather_roughness_factor(blender_material, export_settings)
)
export_user_extensions('gather_material_pbr_metallic_roughness_hook', export_settings, material, blender_material, orm_texture)
return material
def __filter_pbr_material(blender_material, export_settings):
return True
def __gather_base_color_factor(blender_material, export_settings):
if not blender_material.use_nodes:
return [*blender_material.diffuse_color[:3], 1.0]
rgb, alpha = None, None
alpha_socket = gltf2_blender_get.get_socket(blender_material, "Alpha")
if isinstance(alpha_socket, bpy.types.NodeSocket):
if export_settings['gltf_image_format'] != "NONE":
alpha = gltf2_blender_get.get_factor_from_socket(alpha_socket, kind='VALUE')
else:
alpha = gltf2_blender_get.get_const_from_default_value_socket(alpha_socket, kind='VALUE')
base_color_socket = gltf2_blender_get.get_socket(blender_material, "Base Color")
if base_color_socket is None:
base_color_socket = gltf2_blender_get.get_socket(blender_material, "BaseColor")
if base_color_socket is None:
base_color_socket = gltf2_blender_get.get_socket_old(blender_material, "BaseColorFactor")
if isinstance(base_color_socket, bpy.types.NodeSocket):
if export_settings['gltf_image_format'] != "NONE":
rgb = gltf2_blender_get.get_factor_from_socket(base_color_socket, kind='RGB')
else:
rgb = gltf2_blender_get.get_const_from_default_value_socket(base_color_socket, kind='RGB')
if rgb is None: rgb = [1.0, 1.0, 1.0]
if alpha is None: alpha = 1.0
rgba = [*rgb, alpha]
if rgba == [1, 1, 1, 1]: return None
return rgba
def __gather_base_color_texture(blender_material, export_settings):
base_color_socket = gltf2_blender_get.get_socket(blender_material, "Base Color")
if base_color_socket is None:
base_color_socket = gltf2_blender_get.get_socket(blender_material, "BaseColor")
if base_color_socket is None:
base_color_socket = gltf2_blender_get.get_socket_old(blender_material, "BaseColor")
alpha_socket = gltf2_blender_get.get_socket(blender_material, "Alpha")
# keep sockets that have some texture : color and/or alpha
inputs = tuple(
socket for socket in [base_color_socket, alpha_socket]
if socket is not None and __has_image_node_from_socket(socket)
)
if not inputs:
return None
return gltf2_blender_gather_texture_info.gather_texture_info(inputs[0], inputs, export_settings)
def __gather_extensions(blender_material, export_settings):
return None
def __gather_extras(blender_material, export_settings):
return None
def __gather_metallic_factor(blender_material, export_settings):
if not blender_material.use_nodes:
return blender_material.metallic
metallic_socket = gltf2_blender_get.get_socket(blender_material, "Metallic")
if metallic_socket is None:
metallic_socket = gltf2_blender_get.get_socket_old(blender_material, "MetallicFactor")
if isinstance(metallic_socket, bpy.types.NodeSocket):
fac = gltf2_blender_get.get_factor_from_socket(metallic_socket, kind='VALUE')
return fac if fac != 1 else None
return None
def __gather_metallic_roughness_texture(blender_material, orm_texture, export_settings):
metallic_socket = gltf2_blender_get.get_socket(blender_material, "Metallic")
roughness_socket = gltf2_blender_get.get_socket(blender_material, "Roughness")
hasMetal = metallic_socket is not None and __has_image_node_from_socket(metallic_socket)
hasRough = roughness_socket is not None and __has_image_node_from_socket(roughness_socket)
if not hasMetal and not hasRough:
metallic_roughness = gltf2_blender_get.get_socket_old(blender_material, "MetallicRoughness")
if metallic_roughness is None or not __has_image_node_from_socket(metallic_roughness):
return None
texture_input = (metallic_roughness,)
elif not hasMetal:
texture_input = (roughness_socket,)
elif not hasRough:
texture_input = (metallic_socket,)
else:
texture_input = (metallic_socket, roughness_socket)
return gltf2_blender_gather_texture_info.gather_texture_info(
texture_input[0],
orm_texture or texture_input,
export_settings,
)
def __gather_roughness_factor(blender_material, export_settings):
if not blender_material.use_nodes:
return blender_material.roughness
roughness_socket = gltf2_blender_get.get_socket(blender_material, "Roughness")
if roughness_socket is None:
roughness_socket = gltf2_blender_get.get_socket_old(blender_material, "RoughnessFactor")
if isinstance(roughness_socket, bpy.types.NodeSocket):
fac = gltf2_blender_get.get_factor_from_socket(roughness_socket, kind='VALUE')
return fac if fac != 1 else None
return None
def __has_image_node_from_socket(socket):
result = gltf2_blender_search_node_tree.from_socket(
socket,
gltf2_blender_search_node_tree.FilterByType(bpy.types.ShaderNodeTexImage))
if not result:
return False
return True
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