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Metapost Animation of Sine
by Jeroen 22 Jul '21

22 Jul '21

I use this small animation to enlarge a circle \usemodule[animation] \setupinteraction[state=start] \starttext \startanimation[menu=yes,framerate=10] \dorecurse{7}{\expanded {\startframe \startMPcode path p; numeric n, u; u := 1cm; n:=\recurselevel*u; p := fullcircle scaled n; draw p; \stopMPcode \stopframe}} \stopanimation \stoptext This I use to draw a sine \starttext \startMPcode draw(-90/360*1.5cm,-0.9cm) for i = -90 upto 630: .. (i/360*1.5cm,0.9cm*(sind(i)))endfor; \stopMPcode \stoptext When I put it together to animate the sine as following, it does not entirely create the sine animation I am looking for \usemodule[animation] \setupinteraction[state=start] \starttext \startanimation[menu=yes,framerate=10] \dorecurse{7}{\expanded {\startframe \startMPcode path p; numeric n, u; u := 1cm; n:=\recurselevel*u; p := (-90/360*1.5cm,-0.9cm) for i = -90 upto 630: .. (i/360*1.5cm,0.9cm*(sind(i))) endfor shifted (n,0); draw p; \stopMPcode \stopframe}} \stopanimation \stoptext What better way can I create a sine animation with Metapost?

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another MetaPost question (this time on ConTeXt->MetaPost
by Rudd, Kevin 22 Jul '21

22 Jul '21

Hey--- There seems to be a change with color transfer from ConTeXt to MetaPost. Using string references to defined (spot?) colors seemed to work but now does not; all of my colorful figures are now rendered only in shades of gray when using defined (spot?) colors…. The figure drawn by the MWE should have a dark orange border and a transparent (thin) orange fill. However, all colors of this sort seem to end up being a single shade of gray (e.g. black), rendering a box perfect for Halloween use but not for my current purposes. Is there a change to how colors defined in ConTeXt are referenced in MetaPost that I've missed or is there an issue with transferring color (name or parameter) information to MetaPost? Defined (spot?) colors work fine in ConTeXt but not in MetaPost. Many thanks, ---K %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % system > ConTeXt ver: 2021.07.21 19:54 LMTX fmt: 2021.7.22 int: english/english \startMPdefinitions presetparameters "parameters_Test" [ ] def Test = applyparameters "parameters_Test" "do_Test" enddef; def do_Test = pushparameters "parameters_Test"; string p; p = getparameter "prefix"; show p; string c; c = getparameter "color"; show c; path s; s = unitsquare scaled 10cm; show s; fill s withpen pencircle scaled 5pt withcolor p&c; draw s withpen pencircle scaled 5pt withcolor c; enddef; \stopMPdefinitions \starttext \definespotcolor[Thin:orange][orange][p=1,a=normal,t=0.5] \color[orange]{hello} \startalignment[center] \startplacefigure \startMPcode Test [ prefix = "Thin", color = "orange" ]; \stopMPcode \stopplacefigure \stopalignment \color[Thin:orange]{goodbye} \stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Kevin W. Rudd, Ph.D. CAPT, USN (Ret) Computer Architecture & Computer Engineering Advanced Computing Systems (ACS) Research Program Laboratory for Physical Sciences (LPS) 443-654-7878 kevin(a)lps.umd.edu<mailto:kevin@lps.umd.edu> Visiting Research Professor United States Naval Academy rudd(a)usna.edu<mailto:rudd@usna.edu>

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How to place text before a table inside a column environment
by Michael Guravage 22 Jul '21

22 Jul '21

I have created a table and placed it inside a columns environment; which works as advertised. However, if I place any text before the column environment, the columns break. More clearly stated, only one column appears on the first table page; whereas two columns resume on subsequent pages. I have attached a mwe where you can use --mode=title to invoke the broken columns. Any advice on how to place text above the columns environment would be gratefully received. With kind regards, Michael

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Getting the local float reference within a float and reuse (?) it later (\somelocalfloat?)
by Benjamin Buchmuller 22 Jul '21

22 Jul '21

Hi, Is there a more convenient way to get the current reference label (stably) from within a float? For example, I would like to make an "image credits" section at the end of a document, so I do something similar to: \defineblock[credits] \starttext \section[sec:topic]{Topic} \startplacefigure [ title={Awesome figure. Image credits in \about[sec:credits].}, reference=fig:awesome, ] \begincredits \in{Figure}[fig:awesome] in \in{Section}[sec:topic] was not created by me. \endcredits \stopplacefigure \section[sec:credits]{Appendix} \useblocks[credits] \stoptext The block mechanism comes in really handy here, especially since I have more to show at the end than just the credits. However, each time I add another figure, I have to replace the references appropriately. So, I was wondering how about exploiting some pointers: \begincredits \somelocalfloat[figure][current] in Section \someheadnumber[section][current] was not created by me. \endcredits \processblocks[credits] % expected \someheadnumber to evaluate to 1? \stopplacefigure Yet, even if asked to be processed within the first section, \someheadnumber evaluates at the end to "2" (should be "1" in my opinion)? This is independent of calling it from within the float or the main text. I guess, my understanding of "processblocks" is wrong in this respect. % \begincredits % This is the call from the text \someheadnumber[section][current] % \endcredits % % \processblocks[credits] Further, \somelocalfloat doesn't show anything. What does it do? Two probably not really urgent questions as I can live with putting the explicit names, but maybe there is an even better approach that comes in handy in more circumstances. Thanks in advance! Benjamin

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drop cap (initial) and indentation
by Gerben Wierda 22 Jul '21

22 Jul '21

With the following minimal example: \definemeasure[CAindent][12pt] % Every chapter body text starts with a drop cap: \setupinitial[n=3,m=1,-\measure{CAindent}]] \setupindenting[yes,\measure{CAindent}] \starttext \placeinitial S{\bf{\kap uppose we}} have a system for the approval of loans. \input knuth \stoptext both the initial and the bold stuff after it is indented. With hoffset I can move the initial, but not what comes after. I have been experimenting but haven’t found a way to solve this. Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>) R&A Enterprise Architecture <https://ea.rna.nl/> (main site) Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/> PS. switching \kap and \bf has an interesting result, the first character of the words is not in bold. This did not happen with lettrine in mkii

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MP keyword function: string parameters no longer accept string variables directly
by Rudd, Kevin 21 Jul '21

21 Jul '21

Hi--- Here's another apparent change on the MP side---for keyword functions, string parameters no longer accept string variables directly. They do seem to register them (hasparameter => true) but don't capture the value (getparameter => 0). Thus: system > ConTeXt ver: 2021.07.16 22:03 LMTX fmt: 2021.7.21 int: english/english metapost > trace > This is MPLIB for LuaMetaTeX, version 3.11, running in scaled mode. metapost > trace > metapost > trace > loading metafun for lmtx, including the plain 1.004 base definitions metapost > trace > metapost > trace > >> "string constant fuschia ..." metapost > trace > >> true metapost > trace > >> "fuschia" metapost > trace > >> "string variable fuschia = fuschia ..." metapost > trace > >> true metapost > trace > >> 0 metapost > trace > >> "expression containing string variable fuschia = fuschia ..." metapost > trace > >> true metapost > trace > >> "fuschia" String constant: succeeds String variable: fails String expression with string variable: succeeds Here's the MWE: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % system > ConTeXt ver: 2021.07.16 22:03 LMTX fmt: 2021.7.21 int: english/english \startMPdefinitions presetparameters "parameters_Test" [ ] def Test = applyparameters "parameters_Test" "do_Test" enddef; def do_Test = pushparameters "parameters_Test"; show hasparameter "color"; show getparameter "color"; enddef; \stopMPdefinitions \starttext hello \startalignment[center] \startplacefigure \startMPcode string fuschia; fuschia = "fuschia"; show "string constant fuschia ..."; Test [ color = "fuschia" ]; show "string variable fuschia = " & fuschia & " ..."; Test [ color = fuschia ]; show "expression containing string variable fuschia = " & fuschia & " ..."; Test [ color = "" & fuschia ]; \stopMPcode \stopplacefigure \stopalignment goodbye \stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Kevin W. Rudd, Ph.D. CAPT, USN (Ret) Computer Architecture & Computer Engineering Advanced Computing Systems (ACS) Research Program Laboratory for Physical Sciences (LPS) 443-654-7878 kevin(a)lps.umd.edu<mailto:kevin@lps.umd.edu> Visiting Research Professor United States Naval Academy rudd(a)usna.edu<mailto:rudd@usna.edu>

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Layers – when do they repeat?
by Henning Hraban Ramm 21 Jul '21

21 Jul '21

Hi, I’m struggling with layers again. According to https://wiki.contextgarden.net/Layers and my previous experience, what you typeset on layers appears only once, while you don’t set repeat=yes. But in my example (derived from a magazine layout where I use this margin layer for subtitles) the margin text is repeated on every page. Same behavior in current LMTX and MkIV. What did I wrong? Or is it a bug? (The same setup didn’t cause repeats in 2019.) Hraban \usemodule[visual] \setuplayout[ backspace=82mm, width=118mm, leftmargindistance=4mm, leftmargin=57mm, ] \definelayer[leftmargin][ x=0mm,y=3mm, width=\leftmarginwidth, height=\textheight ] \setupbackgrounds[text][leftmargin][background=leftmargin,state=start] \starttext \setlayerframed[leftmargin][ frame=off, offset=overlay, width=\leftmarginwidth, align={flushleft,verytolerant}, ]{Why is this repeated on every page? It should not.}% \dorecurse{20}{ \fakewords{20}{100}\par } \stoptext

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Re: [NTG-context] ntg-context Digest, Vol 205, Issue 1 // log: use \thinspace instead of \,
by Rudd, Kevin 21 Jul '21

21 Jul '21

Revisiting this one---as noted in the thread \, used to work in text mode; according to the logs it was deprecated and now produces an error preventing most of my documents from compiling. Is there solution that restores \, (and friends) for abbreviated spacing in text mode that doesn't require bulk changes to all of my documents (and making the source documents hard to type/read)? I appreciate using the more verbose \thinspace in macros but the abbreviations have real value in bulk text, especially when heavily used. I have many uses throughout my documents where I need a thin space (such as working with SI units) where it would be very awkward to use \thinspace everywhere in the source text. for example, consider a simple example that used to work but no longer does with the alternatives that I'm aware of: 32\,MiB--64\,MiB 32$\,$MiB--64$\,$MiB 32\thinspace MiB--64\thinspace MiB The difference in both writeability and readability for these cases is significant, especially when there are many uses close together in either text or table. Thanks, ---K Re: log: use \thinspace instead of \, On 6/30/2021 10:57 PM, Wolfgang Schuster wrote: Alan Braslau schrieb am 29.06.2021 um 17:40: On Tue, 29 Jun 2021 14:06:02 +0200 Henning Hraban Ramm <texml(a)fiee.net<mailto:texml@fiee.net>> wrote: Maybe, but in running text I use \, all the time e.\,g. in abbreviations or for numbers (10\,000). At least in German typography these “spatiums” are necessary. In French typography as well. Indeed, American: 10,000.00 French: 10\,000,00 (and other languages). This is quite readable, and much preferred to the use of any kind of macro that might format numbers according to language. I find that students often need such helpers when deciphering many digits. Let's not forget all of these spaces commands are used in math mode. Sure, and thet adaot to math mode. They will nto dissppear, it's just that in macros I like more verbose names. Hans Kevin W. Rudd, Ph.D. CAPT, USN (Ret) Computer Architecture & Computer Engineering Advanced Computing Systems (ACS) Research Program Laboratory for Physical Sciences (LPS) 443-654-7878 kevin(a)lps.umd.edu<mailto:kevin@lps.umd.edu> Visiting Research Professor United States Naval Academy rudd(a)usna.edu<mailto:rudd@usna.edu> --------------------------------------

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LMTX and lettrine
by Gerben Wierda 19 Jul '21

19 Jul '21

I am trying to find out how to move this setup in mkii 23 \usemodule[lettrine] 24 >> \setuplettrine[Lines=3, 25 Hang=.5, 26 Oversize=0, 27 Raise=0, 28 Findent=0pt, 29 Nindent=0em, 30 Slope=0em, 31 Ante=, 32 FontHook=, 33 TextFont=\sc, 34 Image=no] to lmtx. (Basically, ConTeXtgarden gives my mike info for lettrine) Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>) R&A Enterprise Architecture <https://ea.rna.nl/> (main site) Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>

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\xmlrefatt as node?
by Pablo Rodriguez 19 Jul '21

19 Jul '21

Dear list, I have the following sample: \startbuffer[test] <document> <div id="section-i17a" class="section level1 hidden"> <p id="par-i17"><a href="par-i17">1</a></p> </div> <div id="section-i18a" class="section level1 hidden"> <p id="par-i18"><a href="par-i17">2</a></p> </div> <div id="section-i19a" class="section level1 hidden"> <p id="par-i19"><a href="par-i17">3</a></p> </div> </document> \stopbuffer \startxmlsetups xml:testsetups \xmlsetsetup{#1}{*}{-} \xmlsetsetup{#1}{document|div|p|a}{xml:flushing} \xmlsetsetup{#1}{a}{xml:*} \stopxmlsetups \xmlregistersetup{xml:testsetups} \startxmlsetups xml:flushing \xmlflush{#1} \stopxmlsetups \startxmlsetups xml:a \xmlattribute{#1}{ancestor::div[@class='section level1 hidden']}{id}\\ \xmlrefatt{#1}{href}:\ \doifelse {\xmlrefatt{#1}{href}} {\xmlattribute{#1}{ancestor::div[@class='section level1 hidden']}{id}} {yes}{no}\blank \stopxmlsetups \starttext \xmlprocessbuffer{main}{test}{} \stoptext I need to check whether the link is inside the same div or not. I know how to obtain the destination identifier (\xmlreffatt{#1}{href} and I know how to obtain the identifier of the contaning div (\xmlattribute{#1}{ancestor::div[@class='section level1 hidden']}{id}}). But I don’t know how to ge the identifier of the div which contains the destination idetifier. How could I get that? Many thanks for your help, Pablo -- http://www.ousia.tk

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