void set_actor_position(Actor *actor, gint x, gint y, gint z, AWallpaperPlugin *desktop_plugin);
void set_actor_scale(Actor *actor, double scalex, double scaley);
void set_actor_visible(Actor *actor, gboolean visible);
+void change_obj(Actor * actor, AWallpaperPlugin *desktop_plugin);
void change_billboard(Actor * actor, AWallpaperPlugin *desktop_plugin);
void change_moon(Actor * actor, AWallpaperPlugin *desktop_plugin);
void change_sun(Actor * actor, AWallpaperPlugin *desktop_plugin);