def update_scene(self, scene_graph, materials_only):
"""Update a scene using scene_graph description
Arguments:
scene_graph {SceneGraph} -- scene description
materials_only {bool} -- update only shape materials
"""
for uid, pb_node in scene_graph.nodes.items():
node = NodePath(f'pb_node_{uid:03d}')
for pb_shape in pb_node.shapes:
filename = shape_filename(pb_shape)
if not filename:
continue
shape = self._loader.load_model(filename)
shape.set_mat(Mat4(*pb_shape.pose.matrix))
shape.reparent_to(node)
if shape.has_material:
shape.set_material(PbMaterial(pb_shape.material), 1)
texture_id = pb_shape.material.diffuse_texture
if texture_id > -1:
texture = scene_graph.texture(texture_id)
shape.set_texture(texture.filename)
node.flatten_light()
node.reparent_to(self.scene)
self._node_dict[uid] = node
