action->set_param("canvas_interface",get_canvas_interface());
action->set_param("time",time);
action->set_param("new_value",(*parent_value_node->get_link("t1"))(time));
action->set_param("canvas_interface",get_canvas_interface());
action->set_param("time",time);
action->set_param("new_value",(*parent_value_node->get_link("t1"))(time));