[circuits lib] units are invisible with luatex

[pgf-tikz-bot]

Migrated from SourceForge
Author: cjorssen
Timestamp: 2011-10-22 11:06:57

When compiling the manual with lualatex, the large introductory example (subsubsection First example) won't show the ohm symbol (\Omega) whereas the pdflatex version will.

The culprit seems to be in tikzlibrarycircuits.code.tex
\def\tikz@lib@circ@lab[#1]#2\pgf@stop#3#4{\tikzset{label={[every info/.try,every #4/.try,#1]$\mathrm{#2#3}$}}}
\def\tikz@lib@circ@lab@sloped[#1]#2\pgf@stop#3#4{\tikzset{label={[every info/.try,every #4/.try,transform shape,#1]$\mathrm{#2#3}$}}}
\def\tikz@lib@circ@labp[#1]#2\pgf@stop#3#4{\tikzset{label={[every info/.try,every #4/.try,#1]below:$\mathrm{#2#3}$}}}
\def\tikz@lib@circ@lab@slopedp[#1]#2\pgf@stop#3#4{\tikzset{label={[every info/.try,every #4/.try,transform shape,#1]below:$\mathrm{#2#3}$}}}

The #3 should be inside \mathrm{} *except* for \Omega. I don't know why and I don't have a quick fix idea.

BTW, there seem to be an other issue with units. The volt symbol doesn't show up in both lualatex and pdflatex version.

[pgf-tikz-bot]

Migrated from SourceForge
Author: cjorssen
Timestamp: 2011-10-23 14:15:35

See a related post

http://tex.stackexchange.com/questions/32337/mathrm-and-omega-in-xelatex

[pgf-tikz-bot]

Migrated from SourceForge
Author: tantau
Timestamp: 2013-07-18 15:59:24.272000

• status: open --> closed
• Group: --> v1.0 (example)

[pgf-tikz-bot]

Migrated from SourceForge
Author: tantau
Timestamp: 2013-07-18 15:59:24.837000

The culprit is fontspec since it does not display $\mathrm{\Omega}$. I clearly consider this a bug of fontspec. I also do agree with the discussion on stackexchange that $\mathrm{\Omega}$ is somehow "wrong" (actually, I think such a claim is total nonsense...). Fontspec needs to be fixed here.