20220d47e3
besides performance in some cases. * DAG_scene_sort is now removed and replaced by DAG_relations_tag_update in most cases. This will clear the dependency graph, and only rebuild it right before it's needed again when the scene is re-evaluated. This is done because DAG_scene_sort is slow when called many times from python operators. Further the scene argument is not needed because most operations can potentially affect more than the current scene. * DAG_scene_relations_update will now rebuild the dependency graph if it's not there yet, and DAG_scene_relations_rebuild will force a rebuild for the rare cases that need it. * Remove various places where ob->recalc was set manually. This should go through DAG_id_tag_update() in nearly all cases instead since this is now a fast operation. Also removed DAG_ids_flush_update that goes along with such manual tagging of ob->recalc.