May 2021 - ntg-context - NTG Mailing Lists

randomize direction of arrow in metafun
by Thomas A. Schmitz 15 May '21

15 May '21

Hi all, for a slide template, I want to draw colored arrows in a randomized color (from a list of colors). This works (and the code is far too clever for me, I must have copied it somewhere): save mycolor ; color mycolor[] ; mycolor[1] := (0.2, 0.3, 0.4) ; mycolor[2] := (0.6, 0.6, 0.4) ; mycolor[3] := (0.5, 0.8, 0.5) ; so I can write drawarrow p withcolor mycolor[round(uniformdeviate(9))] ; But I also want the direction of the arrow to be random. My first idea was to define a variable that would expand either to "reverse" or the empty string right after drawarrow, but that's where I'm stuck. Anyone has an idea how to achieve this? (It's probably somewhere in the source, but I can't find it.) And is the method of defining the random color OK, or could this also be improved. Thanks, and all best Thomas

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NotoColorEmoji - loca table not found
by Adam Reviczky 14 May '21

14 May '21

Hi, I am trying to use the 'handshake' character ( https://www.fileformat.info/info/unicode/char/1f91d/fontsupport.htm) from the Noto Color Emoji font ( https://github.com/googlefonts/noto-emoji/blob/main/fonts/NotoColorEmoji.ttf ). The following MWE gives an error: \starttext \definedfont[file:NotoColorEmoji.ttf] \char"1F91D \stoptext fonts > otf loading > loading 'NotoColorEmoji.ttf', hash 'notocoloremoji' system > lua > compiling '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tma' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tmc' system > lua > dumping '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tma' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tmc' stripped fonts > otf loading > loading done fonts > otf loading > saving 'NotoColorEmoji.ttf' in cache system > lua > compiling '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tma' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tmc' system > lua > dumping '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tma' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tmc' stripped fonts > otf loading > loading, optimizing, packing and caching time 2.557 pages > flushing realpage 1, userpage 1, subpage 1 close source > level 2, order 3, name '/tmp/MWE.tex' close source > level 1, order 3, name '/usr/share/texmf/tex/context/base/mkiv/cont-yes.mkiv' ! error: (file NotoColorEmoji.ttf) (ttf): loca table not foundmtx-context | fatal error: return code: 256 Any idea what is wrong? Adam

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[installing lmtx on raspi400]
by Floris van Manen 13 May '21

13 May '21

No desktop system is complete before having a proper lmtx installed ;-) So with this OS version $ uname -a Linux rp400 5.10.17-v8+ #1414 SMP PREEMPT Fri Apr 30 13:23:25 BST 2021 aarch64 GNU/Linux $ hostnamectl Static hostname: rp400 Icon name: computer Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 5.10.17-v8+ Architecture: arm64 I downloaded context-linux-aarch64.zip unzipped it in the ~/context folder and ran the install.sh script $ sudo sh ./install.sh this gives an error: /home/pi/context/bin/mtxrun: /lib/aarch64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /home/pi/context/bin/mtxrun) Anyone with a hint ? Thx .Floris

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mathscript in math mode
by Fabrice Couvreur 13 May '21

13 May '21

Hi, Is it possible to run the macro in math mode ? Thank you Fabrice \usebodyfont [stix] \setupbodyfont[modern] \setupmathematics[stylealternative=calligraphic] \unexpanded\def\CScript#1#2{\start\switchtobodyfont[stixtwo] \m{{\mathscript{#1}}_{#2}}\stop} \unexpanded\def\cscript#1{\start\switchtobodyfont[stixtwo]\m{{\mathscript{#1}}}\stop} \starttext \cscript{P} \startformula \cscript{P} \stopformula \stoptext

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Fwd: Fuzzy lines
by Jairo A. del Rio 13 May '21

13 May '21

---------- Forwarded message --------- De: Jairo A. del Rio <jairoadelrio6(a)gmail.com> Date: mié, 12 de may. de 2021 a la(s) 14:08 Subject: Re: [NTG-context] Fuzzy lines To: mailing list for ConTeXt users <ntg-context(a)ntg.nl> El mié, 12 de may. de 2021 a la(s) 13:03, Henning Hraban Ramm ( texml(a)fiee.net) escribió: > Hi Jairo, > > thank you for the suggestion. > > > Am 11.05.2021 um 14:56 schrieb Jairo A. del Rio <jairoadelrio6(a)gmail.com > >: > > > > For simple pens, you may define your own (section 9.7 of MetaPost > manual). > > Unfortunately, pens don’t work as patterns but only as outlines. > > > For complicated strokes, something along these lines could be useful as > a starting point (I'm not taking cyclic paths in consideration, btw). I did > something similar with duck footprints some weeks ago: > > > > %Sorry for the ugly code... > > \starttext > > \startMPpage > > %Unit size > > numeric u; u := 1mm; > > > > %In a picture you are able to include everything, kinda > > picture Pluma; > > Pluma := image( > > for i = 1 upto 5: > > for j = 1 upto 5: > > draw (i,j) randomized 1; > > endfor > > endfor > > ); > > Unfortunately, that’s the same pattern over and over. > The randomization is only applied once. > Good for footprints, bad for fuzzy patterns. > You only need to move "randomized" at the drawing stage: \starttext \startMPpage numeric u; u := 1mm; picture Pluma; Pluma := image( for i = 1 upto 5: for j = 1 upto 5: draw (i,j); endfor endfor ); path Camino; Camino := origin for i = 1 upto 30: .. (u*i, u*sind (12i mod 360)) endfor; for i = 0 step 1/2 until length Camino: draw Pluma randomized 1 rotated (90 + angle direction i of Camino) shifted point i of Camino; endfor \stopMPpage \stoptext But "randomized" will deform paths. Maybe you want something like this? \starttext \startMPpage[align=] begingroup; save Rnd; let Rnd = uniformdeviate; numeric u; u := 3mm; picture Pluma; Pluma := image( for i = 1 upto 5: for j = 1 upto 5: fill fullcircle shifted (i,j); %try fulltriangle or another shape endfor endfor ); path Camino; Camino := origin for i = 1 upto 30: .. u*i*left endfor; for i = 0 step 1/2 until length Camino: draw image( for x within Pluma: fill pathpart x %Assuming our image only contains cyclic paths scaled (1+Rnd 1) shifted (1/2dir Rnd 360) withcolor hsvtorgb(6round(Rnd 60),9/10,1); %Colors just because they look cute endfor ) rotated (90 + angle direction i of Camino) shifted point i of Camino; endfor endgroup; \stopMPpage \stoptext > %Simple curve > > path Camino; > > Camino := origin for i = 1 upto 30: .. (u*i, u*sind (12i mod 360)) > endfor; > > > > %Strokes > > for i = 0 step 1/2 until length Camino: > > draw Pluma rotated (90 + angle direction i of Camino) > > shifted point i of Camino; > > endfor > > Since I have more or less straight lines but of different length, the "one > pattern per 1/n path segment" doesn’t work for me. I could try to construct > my paths differently. > You only need to use fractions, i.e., "for 0 step 1/n until 1: ... endfor" if you work with straight lines defined using only two points. In the example above I made one from more than two points just for ease of manipulation. With examples and feedback from the mailing list, you might define your own function using the new Metafun interface for LMTX. > > Hraban > > > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to > the Wiki! > > maillist : ntg-context(a)ntg.nl / > http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://context.aanhet.net > archive : https://bitbucket.org/phg/context-mirror/commits/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > > Jairo

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Language goodies -- hard line break the algorithm?
by denis.maier＠ub.unibe.ch 12 May '21

12 May '21

Hi, testing the new language goodies feature for ligature prevention, I found that hard line breaks seem to interfere somehow with the ligature prevention mechanism: ========================== \setuplanguage[de][ goodies={lang-de.llg}] \startlanguageoptions[de] auf|jubeln \stoplanguageoptions \mainlanguage[de] \definefontfeature[default][default][dlig=yes,liga=yes] \definefontfamily[times][rm][Times New Roman] \setupbodyfont[times] \starttext aufjubeln aufjubeln\\ auffliegen auffliegen\\ begrifflich begrifflich\\ \stoptext ====================== Best, Denis

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Ligatures blocking -- why block unspecified ligatures?
by denis.maier＠ub.unibe.ch 12 May '21

12 May '21

Hi, I just ran into an issue with the \blockligatures mechanism. For some reason, the following examples replaces ffi with f|fi and ffl with f|fl although I have not specified them in \blockligatures: ============================================== \definefontfeature[default][default][dlig=yes,liga=yes] \definefontfeature[default:block][default][blockligatures=yes] % block certain ligatures globally, but not f|fl, f|fi \blockligatures [ft,fft,fj,ffj,fk] \definefontfamily[times][rm][Times New Roman] \startbuffer[test] fj\\ ffi\\ ffl\\ ff\\ fi \stopbuffer \starttext \getbuffer[test] \definedfont[Serif*default:block] \getbuffer[test] \switchtobodyfont[times] \getbuffer[test] % With Times New Roman, we can even see the bars in the output \definedfont[Serif*default:block] \getbuffer[test] \stoptext ================================== What am I missing? (I am trying to block certain ligatures globally, ie. ft,fft,fj,ffj,fk, but fi, ffi, fl, fll are being dealt with in the language goodies file.) Thanks for your help, Denis

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Include PDF pages
by MANUEL GONZALEZ SUAREZ 12 May '21

12 May '21

Hello everybody: My query is as follows: in LaTeX there is the package "pdfpages" (https://www.ctan.org/pkg/pdfpages) that allows pages from a PDF file to be included in a TeX document. Is there a similar procedure that works in ConTeXt? Thanks. M. González.

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KeenWrite 2.0
by Thangalin 11 May '21

11 May '21

Happy to announce that invoking ConTeXt from KeenWrite is now possible. Here's a screenshot showing three different PDFs compiled from the same plain text document: https://github.com/DaveJarvis/keenwrite/blob/master/docs/screenshots.md#pdf… Here are the installation instructions for ConTeXt (basically, make sure that the "context" executable can be found in the system PATH): https://github.com/DaveJarvis/keenwrite/blob/master/docs/typesetting.md KeenWrite downloads: https://github.com/DaveJarvis/keenwrite#download Stay safe everyone!

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Adjusting parameters for a single page
by denis.maier＠ub.unibe.ch 11 May '21

11 May '21

Hi everyone, I know it is possible to make local changes by enclosing text in \start \stop pairs to make local changes. Then, there are also commands that only affect the next/current paragraph, such as \looseness. But is there a similar mechanism for page-layout changes? For example your penalty settings allow widows and orphans, but on one particular page you want to change the penalties. Or, you use \setupalign[height], but on one page you want to use \setupalign[bottom] instead. Is there a way to do this ? Best, Denis

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