public static IEnumerable <Actor> FindActorsInBox(this World world, WPos tl, WPos br) { var a = PPos.FromWPos(tl); var b = PPos.FromWPos(br); var u = PPos.Min(a, b); var v = PPos.Max(a, b); return(world.WorldActor.Trait <SpatialBins>().ActorsInBox(u, v)); }