ntg-context January 2022

ntg-context@ntg.nl

54 participants
116 discussions

\type ignores space between command and bracket
by Wolfgang Schuster 02 Feb '24

02 Feb '24

Hi, in the following code example the result from \type lacks the space between \cmd and the following left bracket. \starttext \starttyping \cmd [...] \stoptyping \type{\cmd [...]} \stoptext Wolfgang

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Status of Asymptote
by Alexandre Christe 10 Jan '24

10 Jan '24

Dear all, I'd like to know what is the status of Asymptote in Context. To my knowledge, metapost/metafun only support 2D (except with the additional libraries from Roegel, which would have to be cleaned up a bit). Otherwise, what shall be used for 3D drawings in Context? TikZ? Something else? Thanks in advance. Alex

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Re: [NTG-context] checkbox in fields show the word yes
by Andres Conrado Montoya 05 Oct '23

05 Oct '23

Firefox doesn't show the "yes", nor Acrobat X, but SumatraPDF does. I modified your definition as: \definefield[test][check][cbox][][] And now the "yes" doesn't appear. However, I don't know how this affects the functionality of the form. -- Andrés Conrado Montoya Andi Kú andresconrado(a)gmail.com http://sesentaycuatro.com http://messier87.com http://chiquitico.org ---------------------------------------- Los fines no justifican los medios, porque la medida verdadera de nuestro carácter está dada por los medios que estamos dispuestos a utilizar, no por los fines que proclamamos. ---------------------------------------- “You develop an instant global consciousness, a people orientation, an intense dissatisfaction with the state of the world, and a compulsion to do something about it. From out there on the moon, international politics look so petty. You want to grab a politician by the scruff of the neck and drag him a quarter of a million miles out and say, ‘Look at that, you son of a bitch.’” — Apollo 14 astronaut Edgar Mitchell

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Luatex 1.12.0 announcement.
by luigi scarso 27 May '23

27 May '23

============================================================== LuaTeX 1.12.0 2020-03-15 ============================================================== This is the release for TeX live 2020. --shell-restricted now forbids loading of dso (dll/so object) Scaled virtual font Aadditional primitives \eTeXglue[stretch|shrink]order for querying order the etex way. Extra features runtoks tex.getmodenames() (as these can differ per engine/version) Permit nested runtoks in more complex situations of nesting (HH) More accurate and correct test for tex.[set|get]math Minor clean-up and bugs fixed -- luigi

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Convertnumber with \ref[number] fails in MkIV, works in LMTX
by Rik Kabel 06 Dec '22

06 Dec '22

Hello list, The following fails with ConTeXt ver: 2021.10.24 21:45 MKIV but works with the companion LMTX. The error message is:tex error > tex error on line 6 in file G:/TestConTeXt/convert.tex: ! Incompatible glue units , pointing to the second \convertnumber line. \definelabel[XX]%[text=,before=,after=,alternative=inright] \startTEXpage[offset=2em] abc\XX[xx]\par \ref[number][xx] · \convertnumber{r}{1} · \convertnumber{R}{\ref[number][xx]} \stopTEXpage In this case I am trying to display with roman numerals the number generated in the label created through \definelabel. Suggestions welcomed. -- Rik

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colors and contours in luametafun
by Jacob Kauffmann 23 Jun '22

23 Jun '22

Dear list, I am a huge fan of the new metafun interface. Hans asked for luametafun requests, so here are a few. - color by value in lmt_surface We want to show a surface plot of a function where the color indicates the function value (instead, or in addition to a light source). The easiest would be to have variable cf for the brightness factor (as it is), and in addition variables such as zt, minz, maxz, akin to the color formatter for lmt_contour. This becomes handy when colors are to be aligned with function values (e.g. negative = blue, zero = white, positive = red, see MWE attached). - controlling line levels in lmt_contour It would be convenient if certain levels could be set by the user. E.g. to make sure the zero level contour line is included. The user interface could potentially take a list, levels = { -1, -.5, 0, .5, 1 }, of contour level lines. See MWE attached. From my understanding marching squares can do that. A possible reference implementation could be QuadContourGenerator [1] in matplotlib, a bit of description can be found in [2]. - colormaps Contour plots often use rather complex colormaps, such as jet, rainbow or veridis. They are optimized for perceptual resolution, color blindness, screen/print or certain use cases. The functionality is already there, but from a user's perspective, it would be much easier if some of these were provided by the interface. The interface could be color = "colormap('jet')(l/n)". Indeed, these are useful in other use cases as well, such as bar charts, surface plots or shades. One rudimentary example is in the attached file. - number of levels in lmt_contour (potential bug) The number of levels is different from the user's input. Depending on the output range it can be lower or higher (see MWE attached). Cheers, Jacob Kauffmann [1] https://github.com/matplotlib/matplotlib/blob/96ff1146ad053c5c7481efd9de039… [2] https://github.com/matplotlib/matplotlib/blob/96ff1146ad053c5c7481efd9de039…

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arm osx
by Hans Hagen 30 May '22

30 May '22

Hi, Thanks to Mojca's persistent efforts we now generate arm osx binaries on the build infrastructure, so lmtx now ships native arm bins for apples. There are also intel solaris builds now but no installers for those platforms (yet). Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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XML Namespaces and XML Setups
by Christoph Reller 24 May '22

24 May '22

Dear List, Consider the following MWE: \startxmlsetups xml:demo:base \xmlsetsetup{#1}{tag}{xml:demo:tag} \stopxmlsetups \xmlregisterdocumentsetup{demo}{xml:demo:base} \startxmlsetups xml:demo:tag %\doif{\xmlnamespace{#1}}{o}{NameSpaceO:} \xmlflush{#1} \stopxmlsetups \starttext \startbuffer[test] <?xml version="1.0"?> <root xmlns="NameSpaceA" xmlns:o="NameSpaceO"> <tag>text</tag> <o:tag>text</o:tag> </root> \stopbuffer \xmlprocessbuffer{demo}{test}{} \stoptext My questions: - Is there a good way to have a separate XML setup for each XML namespace? - Alternatively, one has to do the distinction within the same XML setup. In this case, how do we get the complete namespace? (In this example: "NameSpaceA" and "NameSpaceO") Thanks in advance for your help! Cheers, Christoph

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\asciimode and MetaPost in LMTX result in “Isolated expression”
by Marco Patzer 13 Mar '22

13 Mar '22

Hi! LMTX seems to have an issue with \asciimode and MetaPost: \asciimode \starttext \startMPcode fill unitsquare scaled 2cm; \stopMPcode \stoptext Results in: metafun > log > error: Isolated expression metafun > log > metapost > trace > <error> 􏼥.dash.patterns metapost > trace > <to be read again> vardef metafun > log > metafun > log > I couldn't find an '=' or ':=' after the expression that is shown above this error message, so I guess I'll just ignore it and carry on. metafun > log > metapost > trace > <line 107> vardef dashpattern(text t) = Marco ConTeXt ver: 2022.01.21 20:13 LMTX fmt: 2022.1.21

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Suggestions for more math classes?
by Mikael Sundqvist 16 Feb '22

16 Feb '22

Dear all, While discussing spacing in math with Hans, we have come to the conclusion that to have better control and cleaner code there might be a good idea to have more math classes than the usual ones in TeX (ord, op, bin, rel, open, close, punct, inner (and some that we need not to think about)). So far, Hans has implemented frac and rad for fractions and radicals. The fractions has been a funny construction, being put inside empty delimiters, and so surrounded by the \nulldelimiterspace (which has been set to 1.2pt, independent of font size). Now we have better control of the spacing around fractions. Hans has opened up (even in the code) for the addition of more classes. The overall aim is to have a more coherent and logical way of typing math, without manual adding of (arbitrary) spaces every now and then. For example, we have always written \int f(x)\, dx to have a thin space between the closing parenthesis and the d in integrals. There will (most likely) be a differential class. Since the d might occur in other places in a formula with integrals, one cannot just simply give the letter d the differential class, and we are currently discussing the correct way for the user to type it. If you have suggestions, please let us hear! Some further suggestions by Hans are (see below for two more) 13 imaginary 14 differential 15 exponential 16 function Q1: Do you have any further suggestions on new classes (or comments on these)? It might be good to think about situations where you have felt that you need to insert manual spaces such as \, or \! to obtain a better result. I give one contribution: I asked a colleague to look in his TeX files for manual spaces, and he came up with several \, (usually before the d in integrals) but also with \!. This \! occurred mostly in fencing situations to have the exponent come a bit closer to the closing parenthesis. \left( \frac{x}{2} \right)^{\! k+2n} I have seen this in many places before, so no originality is claimed. Two more classes that we thought of are under and over. Say that we have a\overbar{bc}d. Should the spacing between a and the \overbar{bc} and the spacing between \overbar{bc} and d always be tight? If so, these might just be ord, and no new class needed (although one could argue for adding the classes now, set them up as ord, and thus being able to configure them according to taste/need). Q2: Do you have any real examples of constructions with \overbar, \underbar, \overbrace, ... or if you have any strong opinion, please raise your voice! /Mikael

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ntg-context January 2022