spacing in LuaLaTeX with unicode-math

Question

I would like to use LuaLaTeX with unicode-math to use some OTF math font, but when I switch on unicode-math the spacing in integrals looks bad. Compare the result with the legacy Computer Modern Math font

\documentclass{article}
\begin{document}
\[
  \int_{-A}^{B} dx
\]
\end{document}

with OTF Latin Modern Math

\documentclass{article}
\usepackage{unicode-math}
\begin{document}
\[
  \int_{-A}^{B} dx
\]
\end{document}

\setmathfont{XITS Math} looks even worse

Is there a problem with my installation (fully upgraded TeX Live 2016 on linux, luatex -v gives Version 0.95.0) or this is the best that I should expect with unicode-math?

I seem to remember there were some bugs in this area, I get this image with xits-math with luatex 1.0.2 (and everything else from current texlive 2016) — David Carlisle, Feb 06 '17 at 21:20
You can also use xelatex of course which should produce better output than you show. — David Carlisle, Feb 06 '17 at 21:21
FWIW, if ConTeXt gives the correct results. For example, using a similar test file in ConTeXt, gives me this result; with Latin Modern, I get this — Aditya, Feb 06 '17 at 21:33
@DavidCarlisle Not with LuaTeX 0.95. Possibly it has been fixed in 1.0 — egreg, Feb 06 '17 at 21:33
note your text code has {A} in both cases but your sample images show -A the image I showed is based n the code posted.... — David Carlisle, Feb 06 '17 at 21:35
@DavidCarlisle: I am using LuaTeX, Version 1.0.0 (TeXLive 2017/dev) — Aditya, Feb 06 '17 at 21:36
@Aditya yes I used 1.0.2 I think that's the difference: using 1.0 rather than 0.x not context/latex. — David Carlisle, Feb 06 '17 at 21:37
@DavidCarlisle oh sorry, I indeed generated the images with {-A} — Marco, Feb 06 '17 at 21:51
@Aditya How do you installed TeXLive 2017? I could try that even if in development but I can't find anything on https://www.tug.org/texlive/. Or even just the LuaTeX package would be sufficient — Marco, Feb 06 '17 at 22:07
@Marco: I use ConTeXt minimals, which typically includes the latest binary of luatex. — Aditya, Feb 07 '17 at 01:59
@DavidCarlisle: I think that my output is also correct. Maybe context does something behind the scenes to fix the spacing. It has been a while since I last looked at the .lfg (font goodies) distributed with ConTeXt. — Aditya, Feb 07 '17 at 02:02
@Aditya yes that is what I mean: your output and my output are correct with luatex 1.0(.x) with ether context or latex. — David Carlisle, Feb 07 '17 at 09:06

score 4 · Accepted Answer · answered Feb 06 '17 at 21:41

4

Luatex had some bugs in this area but using luatex 1.0.2 (as will go into texlive 2017, or may be built from source) I get

using

\setmathfont{XITS Math}

You can also get essentially the same output using xelatex if that is an option.

answered Feb 06 '17 at 21:41

David Carlisle

757,742

1

Is there any chance at all that LuaTeX 1.0.2 will be distributed with TeXLive2016 and MacTeX2016? (Please, please, cherry on top?) – Mico Feb 06 '17 at 21:46
@Mico Not down to us but 'very likely no': you can get builds from W32TeX/ConTeXt minimals which work with TeX Live – Joseph Wright Feb 06 '17 at 21:48
David: Where is the git master (or equivalent) source code for LuaTeX? The project page only provides release versions, as far as I can tell. I can compile on Ubuntu 16.04 and regularly do that for GIMP dev version. I wouldn't mind trying LuaTeX 1.0.2 installed in /opt if possible. – Feb 06 '17 at 21:53
you can get the texlive svn but actually I built off luatex experimental branch, svn info says it comes from URL: https://foundry.supelec.fr/svn/luatex/branches/experimental Relative URL: ^/branches/experimental Repository Root: https://foundry.supelec.fr/svn/luatex – David Carlisle Feb 06 '17 at 21:55
Is it possible to install in the user local tree of TeX Live 2016 the package from TeXLive 2017 with LuaTex 1.x? Where I could find it? – Marco Feb 06 '17 at 22:11
@Marco it's an experimental build I compiled from source, as noted in the comment above. – David Carlisle Feb 06 '17 at 22:31
Thank all of you for the answers. Before building TeXLive 2017 from source, one last try: @JosephWright I downloaded ConTeXt minimals and installed in /opt/context. In which sense it works with TeX Live? I have the new luatex executable in PATH, but no lualatex of course. When I run latexmk -lualatex, it still runs the TeX Live 2016 version. – Marco Feb 06 '17 at 23:24
1

@Marco copy the luatex from your texlive bin directory (just in case) and then copy the context one in to place, then run fmtutil-sys to rebuild the formats. the executable will detect its location and default to picking up the texlive 2016 paths – David Carlisle Feb 06 '17 at 23:40

spacing in LuaLaTeX with unicode-math

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