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_emissive_factor(blender_material, export_settings):
emissive_socket = gltf2_blender_get.get_socket(blender_material,
"Emissive")
if emissive_socket is None:
emissive_socket = gltf2_blender_get.get_socket_old(
blender_material, "EmissiveFactor")
if isinstance(emissive_socket, bpy.types.NodeSocket):
if export_settings['gltf_image_format'] != "NONE":
factor = gltf2_blender_get.get_factor_from_socket(emissive_socket,
kind='RGB')
else:
factor = gltf2_blender_get.get_const_from_default_value_socket(
emissive_socket, kind='RGB')
if factor is None and emissive_socket.is_linked:
# In glTF, the default emissiveFactor is all zeros, so if an emission texture is connected,
# we have to manually set it to all ones.
factor = [1.0, 1.0, 1.0]
if factor is None: factor = [0.0, 0.0, 0.0]
# Handle Emission Strength
strength_socket = None
if emissive_socket.node.type == 'EMISSION':
strength_socket = emissive_socket.node.inputs['Strength']
elif 'Emission Strength' in emissive_socket.node.inputs:
strength_socket = emissive_socket.node.inputs['Emission Strength']
strength = (gltf2_blender_get.get_const_from_socket(strength_socket,
kind='VALUE')
if strength_socket is not None else None)
if strength is not None:
factor = [f * strength for f in factor]
# Clamp to range [0,1]
factor = [min(1.0, f) for f in factor]
if factor == [0, 0, 0]: factor = None
return factor
return None
