TeX, LaTeX and Friends

Paulo Cereda

8:37 AM

Top of the morning to you all!

egreg

8:49 AM

@PauloCereda How was the shake yesterday?

Paulo Cereda

@egreg Very shaky. :) I was trying to type an article with my laptop on my lap, but there was no way. So I opened a pack of chips and eat it. :)

daleif

@egreg Exactly what should this be compiled with, both pdftex and xetex complains about missing tfm files.

egreg

@daleif It should work with XeTeX

daleif

@DavidCarlisle nope, \char<number> seems to give me nothing but blank boxes in the output (testing using xelatex)

@egreg I get this (the font is in the same folder as the .tex file)

xetex t.tex
This is XeTeX, Version 3.14159265-2.6-0.99996 (TeX Live 2016) (preloaded format=xetex)
restricted \write18 enabled.
entering extended mode
(./t.tex
kpathsea: Running mktextfm AULogoReg
/opt/texlive/2016/texmf-dist/web2c/mktexnam: Could not map source abbreviation A for AULogoReg.
/opt/texlive/2016/texmf-dist/web2c/mktexnam: Need to update /opt/texlive/2016/texmf-dist/fonts/map/fontname/special.map?
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input AULogoReg

egreg

9:08 AM

@daleif Forgot the quotes, sorry:

\font\test="AULogoReg.ttf"

\count255=0
\loop\ifnum\count255<"10FFF
\advance\count255 1
\iffontchar\test\count255 \the\count255={\test\char\count255}\endgraf\fi
\repeat

\bye

David Carlisle

@daleif what number do you get back from xetexglypindex thing, as I think you said that worked?

@JosephWright do you think it's worth putting in a luaotfload request that luaotfload.main () should be a no-op if called twice? (even if they add that I'm not sure we could use it, would make the format depend on a bleeding edge luaotfload...

daleif

@egreg seems to give me the same error (xetex)

egreg

@daleif Is the font available somewhere for testing?

daleif

@DavidCarlisle numbers? This does work in xelatex: \XeTeXglyph\XeTeXglyphindex"uniF030"

David Carlisle

@daleif yes so what does \count0=\XeTeXglyphindex"uniF030" \showthe\count0 say?

Joseph Wright

9:18 AM

@DavidCarlisle Probably (good idea long-term), but we can't rely on it now ...

David Carlisle

@daleif it could be that the glyphs are not encoded at all in which case they would not be accessible with \char and only accessed via \extexglyph*

daleif

@egreg I was thinking the same, I'm not sure it is open to the public, try medarbejdere.au.dk/fileadmin/www.designmanual.au.dk/hent_filer/…, it should contain the logo font, AU passata and the strange Peto font

Otherwise, I'll just email it to you.

egreg

@daleif It should be \font\test="[AULogoReg.ttf]", but no character is seen. :(

@daleif If I open the font with FontForge, I see that the characters have no assigned code point.

daleif

@DavidCarlisle which basically makes the font unusable with other engines?

egreg

daleif

9:32 AM

@egreg so it is some homemade stuff not complying to standards? But then again where should they place logos?

I'm considering extracting the paths from the four logos and just drawing them in tikz, seems easier than this

egreg

@daleif They should choose any code point in the PUA.

daleif

@egreg PUA?

egreg

@daleif Private Use Area

daleif

@egreg oh, so basically they did not define the font correctly? Yet Word uses it just fine.

David Carlisle

@daleif probably you can get to the glyps from lua (not sure how but basically the entire font is exposed as a lua table, so the information will be ther somewhere...) but from pdftex you woudl anyway need some map file mapping it to something in teh range 0-256 so you would have to re-encode it even if it was encoded.

@daleif what input do you give Word to access a glyph?

Ulrike Fischer

9:39 AM

@daleif What is the problem with using \XeTeXglyph\XeTeXglyphindex"uniF030" ? Imho this is more or less what word does internally too if you click on the glyph in some font table. The glyph is not encoded so you have to get the slot. Would be the same with e.g. wingdings.

David Carlisle

@JosephWright github.com/lualatex/luaotfload/issues/390 (or maybe you get sent that anyway:-)

Joseph Wright

@DavidCarlisle Yes, saw that

David Carlisle

@JosephWright I suppose I need \IfFileExists{luaotfload.sty}{\RequirePackage{luaotfload} in everyjob :(

... or maybe I should just define \ver@luaotfload.sty

daleif

@DavidCarlisle no idea, it is used in a corporate letter template, and I'm updating my LaTeX version of it.

@UlrikeFischer how do you use that in pdflatex or lualatex? I'd rather not want to force users to use an engine they are not familiar with.

David Carlisle

@JosephWright we should change the error message anyway, I think the wording is from a misreading of the code

  if callbacktypes[name] then
    luatexbase_error("Unable to create callback `" .. name ..
                     "':\ncallback type disallowed as name")

having an entry in callbacktypes doesn't mean the argument is a type it means callback name already defined

Ulrike Fischer

9:59 AM

@daleif With lualatex search for luaotfload.aux.slot_of_name in tex.SX. For pdflatex you will have to create a tfm and e.g. a type1 version of the font and a mapping. Imho if you want to be engine independant it is much easier to create a graphic (from the font if you want) and use this.

daleif

11:04 AM

@UlrikeFischer I am considering not using the font at all, too much hassle. The Passata truetype I already have in a Type 1 version.

@UlrikeFischer the problem with the graphic vs font, is changing color. Currently I draw the first of the logos in Tikz instead of installing the font it comes from (The Peto one in the zip), this Logo font with four chars is rather new.

Paulo Cereda

@egreg For a minute, I thought of this: pt.wikipedia.org/wiki/Senta_a_pua!_(s%C3%ADmbolo)

@egreg: trivia: the bird is an ostrich representing the Brazilian pilots. They used an ostrich to symbolize they had to have a strong stomach to eat the American food. :)

Ulrike Fischer

@daleif To some extend you can change the color of a graphic: tex.stackexchange.com/questions/65071/… (but tikz is probably the better way).

daleif

11:20 AM

@UlrikeFischer Agreed. Any idea on how one could extract the curve information from a truetype glyph? I'd rather not want to manually trace it. FontForge seems to be able to see it, just don't know how to extract this into comething human readable.

egreg

11:33 AM

@PauloCereda Do you know what an “ostrica” is in Italian?

@PauloCereda Hint: it is not an ostrich (struzzo).

Paulo Cereda

@egreg ooh in Portuguese is ostra. :)

egreg

@PauloCereda I remember a restaurant in rue Dante in Paris (rive gauche, not far from Nôtre Dame and the Sorbonne) where hundred of oysters were in display.

Paulo Cereda

12:01 PM

@egreg oh my

daleif

@DavidCarlisle hehe, have a look at \XeTeXglyph\XeTeXglyphindex"uniF031" this is our university seal. Note the error at the top of the anchor? At least we found that.

Maeher

12:16 PM

named paths and scopes interact very weirdly in tikz

\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{intersections}
\begin{document}
\begin{tikzpicture}
\tikzset{set/.style={circle,draw,minimum size=2cm}}
\begin{scope}
\node[set,name path=a] {};
\end{scope}
\begin{scope}
\node[set,name path=b] at (.5,0) {};
\end{scope}
\draw [name intersections={of=a and b, by=x}] [draw] (x) circle (3mm);
\end{tikzpicture}
\end{document}

complains that path a is unknown,which may make sense if named paths are local to a scope

but if you remove the scope from the b path, everything works fine

Joseph Wright

@Maeher Odd indeed

Maeher

it's not even clear to me if named paths should be local to a scope... I would argue that they shouldn't, but from my experiments I cannot get an idea what the intended behavior was

daleif

@Maeher Been hit by this as well. There is a global version of name path

name path global=...

Joseph Wright

@daleif Presumably due to the fact that the names are scoped at the 'TeX end' but the scope environment really works at the 'driver end'

daleif

@JosephWright perhaps. Why are nodes global in tikz? even between tikzenvs? I've misused this to make a feature that could display index entries, using tikz to move items in the margins so they did not overlap.

Joseph Wright

12:27 PM

@daleif I've not traced all of this through and comments in pgf are sparse, but I have done some basic experiments with graphics scoping and it is tricky! Till et al. presumably have their reasons

Maeher

I was trying to keep a \tikzset local in a macro definition and thought a scope would be a good idea. But that now meas I will have to be careful to use name path global when using named paths in conjunction with that macro... well

daleif

@JosephWright Well I'm not complaining, it works (almost) fine for the project I made it for.

Maeher

@daleif The gobal nature of node names was pretty much why I expected named paths to be global as well

daleif

3:16 PM

@UlrikeFischer hehe, using FontForge scripting to convert the font to svg and then using that svg information in tikz seems to work quite well

daleif

4:00 PM

Just for reference, here is a comparison, black is the logofont (xelatex) red is tikz (after rescaling, I don't quite know which units the svg came out in)

I'm going to use the tikz solution, too much hassle to use this logo font.

daleif

4:14 PM

I need to learn to read, the scale is in the SVG file.

Paulo Cereda

Friends, is this correct? The extended rule set, as per the theory, ...

David Carlisle

@PauloCereda possibly although sounds rather stilted. what is the ....

perhaps: As implied by the theory, the extended rule set...

Paulo Cereda

@DavidCarlisle The rest of the sentence. :)

@DavidCarlisle Thanks. :)

egreg

@JosephWright Silly migration.

0

Q: Standard notation for accessing a variable out of a data structure

I am writing a technical paper in LaTeX and I have come across this problem: I have a data structure that contains more variables, namely D=(a, b, c). What notation should I use if I want to express that I want to access variable A from d, for example, x = a from D? I don't want to use the word "...

untagged

Joseph Wright

@egreg Yes, I'm not sure it's for the best

egreg

4:24 PM

@JosephWright Probably better in CS or Math; anyhow, it's a low quality question.

Joseph Wright

@egreg Agree on both counts: the latter means forwarding is not a good idea

egreg

@JosephWright Bounce?

Joseph Wright

wordpress.org/news/2016/12/moving-toward-ssl

Going to have to work out if I can get certificates for the sites I run

Paulo Cereda

5:03 PM

I need help!

Does this make sense? the composing elements are simply pointers to their original references, which are accessible through the bridging protocol.

David Carlisle

5:39 PM

@PauloCereda possibly, although it's hard to be sure if something makes sense if you don't know what it means

Paulo Cereda

5:54 PM

@DavidCarlisle Thanks. :)

David Carlisle

6:19 PM

people are so rude on this site

@DavidCarlisle Go away! — egreg 39 mins ago

egreg

6:42 PM

@DavidCarlisle Sh** up!

David Carlisle

8:51 PM

3

Q: more realistic continuum potato

I'm trying to get a realistically looking continuum potato. This is what I already achieved but i would like to improve the outcome by rotating the light-shading and make it bigger. Is there any way to do that? \documentclass[a4,10pt,fleqn]{scrartcl} \usepackage{tikz} \usetikzlibrary{shapes} \u...

tikz-pgf

is this a suitable answer?

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}

\begin{document}
\definecolor{ca40000}{RGB}{164,0,0}
\definecolor{cef2929}{RGB}{239,41,41}
\definecolor{ce9b96e}{RGB}{233,185,110}
\definecolor{c888a85}{RGB}{136,138,133}
\definecolor{ceeeeec}{RGB}{238,238,236}
\definecolor{c3465a4}{RGB}{52,101,164}
\definecolor{c729fcf}{RGB}{114,159,207}
\definecolor{c6f4709}{RGB}{111,71,9}
\definecolor{cffffff}{RGB}{255,255,255}
\definecolor{c2e3436}{RGB}{46,52,54}


\begin{tikzpicture}[y=0.80pt, x=0.80pt, yscale=-1.000000, xscale=1.000000, inner sep=0pt, outer sep=0pt]

egreg

9:33 PM

Do you see strange icons in the “inbox” and “achievements” tabs?

28

Q: All Stack Exchange site logos are showing up as the 3D Printing one REDUX

All Stack Exchange site logos are showing up as the 3D Printing one This bug just started showing up for me again; I noticed it on both computer and phone.