On Mon, 7 Oct 2024 at 09:10, Hans Hagen via ntg-context <ntg-context@ntg.nl>
wrote:

> On 10/6/2024 8:40 PM, Felix wrote:
> > https://pastebin.com/Cg8ZPDVK
> >
> > I have the code listed above and I am wondering how I can get CJK text
> to be in a vertical form (along with Vietnamese. I know l2r as an option
> exists in startalignment, but there seems to not be a vertical equivalent
> for vertical text. How do I achieve this?
>
> there is something mentioned in followingup-directions.tex
>
> i removed top to bottom directions from luametatex because it made no
> sense; one cannot do vertical typesettign without also looking at the
> layout and other things
>
> instead of directions we do rotation at the glyph level and such which
> has less interference and more flexible
>
> but ... i haven't looked at it recently (could be broken by other
> features) as there is little demand for it
>
> Hans
>
>
For japanese, I think that the only reference for luatex (actually
lualatex) is
https://ctan.org/tex-archive/macros/luatex/generic/luatexja

--
luigi