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# SPDX-License-Identifier: Apache-2.0
# Copyright 2018-2022 The glTF-Blender-IO authors.
import bpy
from io_scene_gltf2.io.com.gltf2_io_extensions import Extension
from io_scene_gltf2.blender.exp import gltf2_blender_get
from io_scene_gltf2.blender.exp import gltf2_blender_gather_texture_info
def export_sheen(blender_material, export_settings):
sheen_extension = {}
sheenColor_socket = gltf2_blender_get.get_socket(blender_material, "sheenColor")
sheenRoughness_socket = gltf2_blender_get.get_socket(blender_material, "sheenRoughness")
if sheenColor_socket is None or sheenRoughness_socket is None:
return None, None
sheenColor_non_linked = isinstance(sheenColor_socket, bpy.types.NodeSocket) and not sheenColor_socket.is_linked
sheenRoughness_non_linked = isinstance(sheenRoughness_socket, bpy.types.NodeSocket) and not sheenRoughness_socket.is_linked
use_actives_uvmaps = []
if sheenColor_non_linked is True:
color = sheenColor_socket.default_value[:3]
if color != (0.0, 0.0, 0.0):
sheen_extension['sheenColorFactor'] = color
else:
# Factor
fac = gltf2_blender_get.get_factor_from_socket(sheenColor_socket, kind='RGB')
if fac is not None and fac != [0.0, 0.0, 0.0]:
sheen_extension['sheenColorFactor'] = fac
# Texture
if gltf2_blender_get.has_image_node_from_socket(sheenColor_socket):
original_sheenColor_texture, original_sheenColor_use_active_uvmap, _ = gltf2_blender_gather_texture_info.gather_texture_info(
sheenColor_socket,
(sheenColor_socket,),
export_settings,
)
sheen_extension['sheenColorTexture'] = original_sheenColor_texture
if original_sheenColor_use_active_uvmap:
use_actives_uvmaps.append("sheenColorTexture")
if sheenRoughness_non_linked is True:
fac = sheenRoughness_socket.default_value
if fac != 0.0:
sheen_extension['sheenRoughnessFactor'] = fac
else:
# Factor
fac = gltf2_blender_get.get_factor_from_socket(sheenRoughness_socket, kind='VALUE')
if fac is not None and fac != 0.0:
sheen_extension['sheenRoughnessFactor'] = fac
# Texture
if gltf2_blender_get.has_image_node_from_socket(sheenRoughness_socket):
original_sheenRoughness_texture, original_sheenRoughness_use_active_uvmap, _ = gltf2_blender_gather_texture_info.gather_texture_info(
sheenRoughness_socket,
(sheenRoughness_socket,),
export_settings,
)
sheen_extension['sheenRoughnessTexture'] = original_sheenRoughness_texture
if original_sheenRoughness_use_active_uvmap:
use_actives_uvmaps.append("sheenRoughnessTexture")
return Extension('KHR_materials_sheen', sheen_extension, False), use_actives_uvmaps
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