ntg-context July 2022

ntg-context@ntg.nl

47 participants
67 discussions

number of chapters
by Henning Hraban Ramm 20 Jul '22

20 Jul '22

Hi, how do I access the current chapter number and the number of chapters (including appendixes; after the first run)? I’d like to setup a chapter color like \definecolor[ChapterColor][ s=1,v=1, h=360*\namedstructurevariable{chapter}{number}/\numberofchapters, ] and use it for a thumb index... (I can’t access the wiki ATM; downforeveryoneorjustme.com says it would be just me.) Hraban

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Metafun : save memory content ?
by Fabrice L 19 Jul '22

19 Jul '22

Dear list, I’m doing animations in MetaFun, by simply using \startMPpage (…) \stopMPpage for each frame of the animation. Here is an example: https://youtu.be/yhxUbVQx9Uo (please note you can watch it in HD by adjusting the setting in YouTube). This works usually great, but when the number of objects to draw by page is large, the resulting pdf file could be huge, several gigabytes sometimes. Such huge files are difficult (sometimes impossible) to convert in jpeg files (I’m using Image magick for the conversion), necessary to do a mp4 movie. One solution is to do several pdf files, for example one by second; with this option, I can do 60 files of 30 pages, for an animation of 60 seconds (1800 frames for 1 minute). Everything is smoother this way, quicker to convert files. But in order to do so, I have to be able to describe each frame of the animation with the same set of instructions; so the position of an object at time t is described by an equation for example. But this is not always possible. If the animation is based on a random process, the position of an object at time t depends on his position at time t-1. I can still use this preceeding strategy by simulating the past at the begging of each second, starting with a unique random seed. So for example if I work on second 9, I begin by calculating the past from frame 1 to frame 240 (8*30) and then simulate time 241, draw frame 241, simulate time 242, draw time 242, etc.. This could be complicated to do, but is feasible. The drawback is that more I advance in time, the more computations I have to do at the beginning of each file. So to simplify things, one option would be to be save the state of some variables at some point in time, say t, in order to be able to access these informations at time t+1. So the strategy would be : % File second1.pdf for frame =1 to 30 : simulate position of objects ; draw the frame ; endfor; save the position of all objects ; % File second2.pdf Read (access) the position of all objects from second 1(after frame 30); for frame =31 to 60 : simulate position of objects ; draw the frame ; endfor; save the position of all objects ; Etc... Does someone has an idea of how to do such a thing ? I can read text file in Context with no problem and integrate them in the animation process with \startMPinclusions (…) \stopMPinclusions, but I did not find a way to write information from MetaFun to a text file. Is Lua the solution ? Thanks for any help ! Fabrice.

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Sudoku module
by Otared Kavian 18 Jul '22

18 Jul '22

Hi Jairo, You sent a message last year about your Sudoku module, and today, out of curiosity, I wanted to test it. Unfortunately it stops with an error message at line 76 of the file t-sudoku.mkiv, where you have: \def\sudokufunction_direct[#name][#parameters]#content I would appreciate if you could tell me whether you have a working version of you module, or what one has to change in order to typeset your examples. Best regards: Otared

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Interaction broken for formulas in LMTX
by Jairo A. del Rio 15 Jul '22

15 Jul '22

Hi, list! Sorry, I don't have a MWE, but it looks like interactive references for formulas (via \in) are not working after the update. I mean, labels are fine, but they do nothing when clicked. References for tables and figures are fine, though. Best regards, Jairo

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mframed and alignment width
by Hans-Joerg Schurr 14 Jul '22

14 Jul '22

Hello everyone, I'm using \startaligned with pairs and a distance to represent inference steps, one per row. Now I would like to sometimes add a vertical bar to the left of the rows and one below the last row. I was able to achieve this using \mframed, but now the contented inside the framed box doesn't span the entire text width. Here is an example: \starttext \startformula \startalign[m=3, n=1,distance=2em plus 1 fil] \NC 1 \NC 2 \NC 3 \NR \NC 4 \NC 5 \NC 6 \NR \stopalign \stopformula \startformula \mframed[frame=off,bottomframe=on,leftframe=on]{ \startalign[m=3, n=1,distance=2em plus 1 fil] \NC 1 \NC 2 \NC 3 \NR \NC 4 \NC 5 \NC 6 \NR \stopalign} \stopformula \stoptext The second alignment should have the same width as the first one. I played around with the options of \mframed, but could not achieve this. :( I will sneak in a a second small question: how can I adjust the distance between the rows? Thank you very much, Hans-Jörg

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simpleslides module for LMTX
by Henning Hraban Ramm 13 Jul '22

13 Jul '22

Hi y’all, I took over maintenance for the simpleslides module and fixed most problems with LMTX. You can download it here: https://codeberg.org/fiee/context-simpleslides/archive/v2022.07.13.zip I’ll also publish it on modules.contextgarden.net and CTAN ASAP. BTW I left Github for political reasons, you can also find my other ConTeXt stuff at https://codeberg.org/fiee/ Hraban

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MP scratch counter
by Henning Hraban Ramm 13 Jul '22

13 Jul '22

Hi y’all, this is a scratch counter from the simpleslides module. It doesn’t work any more (always shows max-1), and I guess it used to. What’s wrong? Hraban """ \startuseMPgraphic{MP:ornament} StartPage ; save a,b ; numeric a,b ; a = 7mm ; b = PaperWidth/2 - NOfPages * 2.5pt ; save p,q; path p,q ; p =((0,5mm) -- (1mm,11mm)) shifted (b,0) ; q =((-8mm,5mm) -- (0,11mm) ) shifted (b,0) ; pickup pencircle scaled 3pt ; for i := NOfPages-1 downto 1: draw (if i mod 5 = 0 : q else : p fi) shifted (i*5pt, 0pt) withcolor if i < PageNumber : red else : black fi ; endfor ; StopPage ; \stopuseMPgraphic \defineoverlay[background:ornament][\useMPgraphic{MP:ornament}] \setupbackgrounds[page][background={background:ornament}] \setupbodyfont[ss,18pt] \starttext \dorecurse{10}{ \strut\par \page } \stoptext """

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New math additional requirement for font definitions
by Alexandre Christe 13 Jul '22

13 Jul '22

Dear list, I've come across that the new math (which by the way looks really nice) requires some additional properties to be set in the font definition. If I take the example file provided by Mikael and add the following lines \usetypescriptfile[alegreya] \setupbodyfont[alegreya,11pt] It fails with the following error message: "tex error on line 16 in file /Users/aleks/Desktop/Test Context/someformulas.tex: Math error: parameter 'limitbelowbgap' with id 36 in style 0 is not set" Libertinus works fine by adding the following two lines \usetypescriptfile[libertinus] \setupbodyfont[libertinus,11pt] Could someone enlighten me? The font definition file is attached. BR, Alex

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Bug in placeformula
by Otared Kavian 13 Jul '22

13 Jul '22

Dear Hans, dear Mikael, In my experiments with the new math engine, I noticed that there is an issue with \placeformula when one sets the location of the numbers on the left: the number is one line above the formula. Here is a minimal example: % begin bug-placeformula-left.tex \setupformulas[location=left] \starttext \placeformula \startformula a^2 + b^2 = c^2. \stopformula \stoptext % end bug-placeformula-left.tex Moreover, in some environments (such as enumerations) the bug destroys completely the flow of text but I could not set up a minimal example to send you. Best regards: Otared

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regular online meet-up
by Henning Hraban Ramm 13 Jul '22

13 Jul '22

You’re invited to join this Wednesday, July 13th, 15:00 CEST (UTC+2) at https://lecture.senfcall.de/hen-rbr-rku-oke ConTeXt users of all levels are welcome! Hans will probably give a Q&A session again – please announce subjects you’d like to discuss ASAP, so that he can prepare. (I guess we’ll get to see some more math magic...) (Same blurb as every time:) [Howto] * No special software installation required; most modern browsers should work (WebRTC required). * Open the above URL, accept the privacy statement, * enter your name, * click "join" (or "start" if you’re the first), * click "with microphone", allow your browser to access it, check the audio. * Your microphone is muted if you join. Activate microphone and/or camera with the buttons at the bottom. * Minimize the default presentation with the "screen" button, bottom right. * If you’d like to share your screen or upload a file, you can make yourself the presenter: Click on your user name, change the setting, then you’ll see the "screen sharing" button beside the camera button; also there’s now "manage presentations" behind the "plus" button. Beware there is only one presenter, so don’t kill someone else’s presentation. [Technical hints] * Sound is usually better if you use a headset (less noise for everyone). * Connection problems are mostly due to low bandwidth or high latency on your side, e.g. with mobile connections. * If audio/video doesn’t work for you, you can still use the text chat. * Screen sharing needs a lot of bandwidth. * BigBlueButton documentation applies: https://bigbluebutton.org/teachers/tutorials/ [Netiquette] * Please use a name that we recognize from here. Some feel uncomfortable with anonymous lurkers. * Mute your microphone while you’re not talking. * It’s nice to show your face at least when you join. * If there are connection problems, stop camera sharing. * The room is set to “everyone’s a moderator“, I trust you... See you, Hraban

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ntg-context July 2022