December 2012 - ntg-context - NTG Mailing Lists

Re: [NTG-context] MetaPost Animations
by Jeong Dal 30 Dec '12

30 Dec '12

Dear Troy, The animations are impressive and thank you for sharing the code. In the creation of many pdf for animation, it changes the recurselevel only. I wonder if there is a way to make such kind of animation in ConTeXt using Wolfgang's animation module. Then we can include the animation in PDF output directly. Here is my trial. I modified it as following and got an animation. But it is only good for a few step animation. %%%%%%%%% \startbuffer[base] N:=64;%\N; u:=136; pair f; c:=2/(1+sqrt(5));%\c; if c<1: f:=(1+-+c,0); v:=u/2; else: f:=(0,1+-+(1/c)); v:=u/c/2; fi; % Focus f is defined path p,q; pair z; picture base; numeric L; p:=fullcircle yscaled c; % This is the ellipse L:=length p; draw p scaled (2*v) withpen pencircle scaled (v/260) dashed evenly; % Draw the ellipse dashed (will be traced later) base:= currentpicture; q:=bbox currentpicture enlarged (v/64); % Enlarge the bounding box slightly q:=(llcorner q+(-v/128,-v/128))--(lrcorner q+(v/128,-v/128))--(urcorner q+(v/128,v/128))--(urcorner q+(-v/128,v/128))--cycle; fill fullcircle scaled (v/32) shifted (f*v) withcolor red; % Focus fill fullcircle scaled (v/32) shifted (-f*v) withcolor red; % Focus base:=currentpicture; % Save this picture to draw in every frame setbounds currentpicture to q; % Set the bounding box as described before \stopbuffer \startbuffer[fig1] % \startMPpage n:=1;%\recurselevel%1; draw base; % Draw the common picture saved above draw subpath (0,(n-1)/(N-1)*L) of p scaled (2*v) withpen pencircle scaled (v/130) withcolor blue; % Trace the ellipse in blue z:=point ((n-1)/(N-1)*L) of p scaled v; % The point on the ellipse where we are thusfar fill fullcircle scaled (v/32) shifted (2*z) withcolor blue; % Draw the point draw (-f*v)--(2*z)--(f*v) withpen pencircle scaled (v/260); % Draw the string used to trace the ellipse setbounds currentpicture to q; % Set the bounding box so that it is the same for each frame % \stopMPpage \stopbuffer \startbuffer[fig2] % \startMPpage n:=2; draw base; % Draw the common picture saved above draw subpath (0,(n-1)/(N-1)*L) of p scaled (2*v) withpen pencircle scaled (v/130) withcolor blue; % Trace the ellipse in blue z:=point ((n-1)/(N-1)*L) of p scaled v; % The point on the ellipse where we are thusfar fill fullcircle scaled (v/32) shifted (2*z) withcolor blue; % Draw the point draw (-f*v)--(2*z)--(f*v) withpen pencircle scaled (v/260); % Draw the string used to trace the ellipse setbounds currentpicture to q; % Set the bounding box so that it is the same for each frame % \stopMPpage \stopbuffer \startbuffer[fig3] % \startMPpage n:=3; draw base; % Draw the common picture saved above draw subpath (0,(n-1)/(N-1)*L) of p scaled (2*v) withpen pencircle scaled (v/130) withcolor blue; % Trace the ellipse in blue z:=point ((n-1)/(N-1)*L) of p scaled v; % The point on the ellipse where we are thusfar fill fullcircle scaled (v/32) shifted (2*z) withcolor blue; % Draw the point draw (-f*v)--(2*z)--(f*v) withpen pencircle scaled (v/260); % Draw the string used to trace the ellipse setbounds currentpicture to q; % Set the bounding box so that it is the same for each frame % \stopMPpage \stopbuffer \setupinteraction[state=start] \usemodule[animation] \starttext \startanimation[menu=yes] {\processMPbuffer[base, fig1]} {\processMPbuffer[base, fig2]} {\processMPbuffer[base, fig3]} \stopanimation \stoptext %%%%%%%%%%%%% I also tried to simplify the code as following, but it just draw 10 figures not an animation. Is there a way to combine them as an animation? Thank you. Best regards, Dalyoung %%%%%%%%%%%%%%%%%%%%%%%%% \startbuffer[base] N:=64;%\N; u:=136; pair f; c:=2/(1+sqrt(5));%\c; if c<1: f:=(1+-+c,0); v:=u/2; else: f:=(0,1+-+(1/c)); v:=u/c/2; fi; % Focus f is defined path p,q; pair z; picture base; numeric L; p:=fullcircle yscaled c; % This is the ellipse L:=length p; draw p scaled (2*v) withpen pencircle scaled (v/260) dashed evenly; % Draw the ellipse dashed (will be traced later) base:= currentpicture; q:=bbox currentpicture enlarged (v/64); % Enlarge the bounding box slightly q:=(llcorner q+(-v/128,-v/128))--(lrcorner q+(v/128,-v/128))--(urcorner q+(v/128,v/128))--(urcorner q+(-v/128,v/128))--cycle; fill fullcircle scaled (v/32) shifted (f*v) withcolor red; % Focus fill fullcircle scaled (v/32) shifted (-f*v) withcolor red; % Focus base:=currentpicture; % Save this picture to draw in every frame setbounds currentpicture to q; % Set the bounding box as described before \stopbuffer \startbuffer[fig1] % \startMPpage n:=\recurselevel; draw base; % Draw the common picture saved above draw subpath (0,(n-1)/(N-1)*L) of p scaled (2*v) withpen pencircle scaled (v/130) withcolor blue; % Trace the ellipse in blue z:=point ((n-1)/(N-1)*L) of p scaled v; % The point on the ellipse where we are thusfar fill fullcircle scaled (v/32) shifted (2*z) withcolor blue; % Draw the point draw (-f*v)--(2*z)--(f*v) withpen pencircle scaled (v/260); % Draw the string used to trace the ellipse setbounds currentpicture to q; % Set the bounding box so that it is the same for each frame % \stopMPpage \stopbuffer \setupinteraction[state=start] \usemodule[animation] \starttext \startanimation[menu=yes] \dorecurse{10}{ {\processMPbuffer[base, fig1]}} %{\processMPbuffer[base, fig2]} %{\processMPbuffer[base, fig3]} \stopanimation \stoptext %%%%%%%

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MetaPost Animations
by Troy Henderson 29 Dec '12

29 Dec '12

I've created several animations using MetaPost/ConTeXt, and I have also created a webpage with these animations. The URL to the page is http://www.tlhiv.org/animations/ Feedback is appreciated, and if there is a particular animation that you would like to see included, let me know and I will attempt to code them up in MetaPost, provide the source code, and include them on the webpage. Troy Henderson

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XeTeX, ConTeXt and font/filename quote char
by Khaled Hosny 29 Dec '12

29 Dec '12

Hi all, Some people have been complaining that it is not possible to use XeTeX with filenames containing parenthesis because XeTeX treats it as filename quote char and this it gets stripped. Anyway, after some searching it turned out this was added in 2004 for ConTeXt to workaround some MetaPost quotation issue[1]. Now I'm not sure if this is still needed/used by ConTeXt and was wondering if it can be dropped now? Regards, Khaled [1] http://tug.org/pipermail/xetex/2004-October/001215.html

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References_to_footnotes in index
by Robert Blackstone 27 Dec '12

27 Dec '12

Dear List, The book that I am working on has an index of authors. On some pages of the book an author's name only occurs in a footnote. Is it possible in ConTeXt to mark, in the index, those occurrences in footnotes so that in these cases not only the page number appears in the index but also, preferably as superscript, the footnote number on that page? As for example Arnold, Franck Th. 9, 283 indicating footnote 3 on page 28 (Sorry, I cannot make a superscript in this mail editor) What I certainly don't want is separate index entries for those authors. Each author name should occur in the index only once. Thanks in advance of any help. Best regards, Robert Blackstone

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\overbar setups
by Idris Samawi Hamid ادريس سماوي حامد 26 Dec '12

26 Dec '12

Dear gang, First: Here's wishing you all the most happy holidays and an early happy new years. ============= ConTeXt ver: 2012.08.14 10:44 MKIV \starttext \overbar{test} \setupbars[color=green,offset=7] \overbar{test} \setupbars[color=red,dy=7] \overbar{test} \stoptext ============= offset and dy don't seem to do anything. Also, I don't know the difference between the two params... Please advise. Best wishes to all! Idris -- Professor Idris Samawi Hamid Department of Philosophy Colorado State University Fort Collins, CO 80523

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Natural Tables in multiple columns
by Jannik Voges 25 Dec '12

25 Dec '12

Hello ConTeXt-Users, I get a strange behavior (latest beta), when I try to typeset natural tables and normal text in multiple columns. When I type normal text into a column and add a natural table which total length is small enough to fit into the column, the table is placed into the column with the text. When the total length is too large, the table starts in the next column and leaves the rest of the column empty (of course I used split=yes). I would expect that the table starts in the column with the text and is split properly. Minimal example: small table \starttext \startcolumns[n=3] \dorecurse{10}{Test\crlf} \bTABLE[split=yes] \dorecurse{10} {\bTR \bTD a\eTD \bTD b \eTD \eTR} \eTABLE \stopcolumns \stoptext large table \starttext \startcolumns[n=3] \dorecurse{10}{Test\crlf} \bTABLE[split=yes] \dorecurse{20} {\bTR \bTD a\eTD \bTD b \eTD \eTR} \eTABLE \stopcolumns \stoptext

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to pass an argument in a macro
by Roland Thiers 25 Dec '12

25 Dec '12

Bonjour, I am new in ConTeXt. I love its features. I need some (or a lot of) help. I tried to get a macro which compute some values for a math function. With help from the wiki ConTeXt Garden and some time I could do that - write my function userdata.f - write another function to put the values in a table : userdata.tabf - put both of them in a file "/Users/rolandt/context/mesfonctionsluatex.lua" - In a file.tex, I use that macro : \def\tabf#1#2% {\startluacode dofile("/Users/rolandt/context/mesfonctionsluatex.lua") userdata.tabf(#1,#2) \stopluacode} Here are the functions: -- fonction cube -- on utilise l'espace de nom userdata userdata=userdata or {} function userdata.f(x) context(x*x*x) end -- fonction tabf -- which makes a table , compute 6 values, b=first x, c = step userdata=userdata or {} function userdata.tabf(b,c) context.starttable{"*{7}{|l}|"} local b=b local c=c context("\\HL") context("\\VL x ") for i=1,6 do context("\\NC" .. b+(i-1)*c) end context("\\VL".."\\AR") context("\\HL") context("\\VL f(x) ") for i=1,6 do context("\\NC") context(userdata.f(b+(i-1)*c)) end context("\\VL".."\\LR") context("\\HL") context.stoptable() end I am sure it could be much better but it works ! Evidently I need a third argument to be able to choose how many values compute. I failed completely (I don't understand how arguments are passed). I tried things like : context.starttable{"*{%s}{|l}|",a} but ... fatal error :) I would appreciate some help or what to read to improve understanding that kind of things. Best regards, Roland

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Help with installation
by Michal Kvasnička 25 Dec '12

25 Dec '12

Hallo. I'm sorry to bother you this time but I would really apprecitate your help. I've installed Ubuntu 12.10 64 bit on a new disk. I downloaded the last stable version of ConTeXt suite (today). The installation was all right. However, when I run texexec (e.g. texexec --help), I get the following error: /programy/context/tex/texmf-linux-64/bin/mtxrun:15228: attempt to index field 'loaders' (a nil value) The same happens with context (e.g. context --help). Can you tell me what to do? I guess I simply need to install some libraries. This is the first time I've tried 64 bit Ubuntu. Best wishes Michal

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Multi-page frame.
by Andre Caldas 22 Dec '12

22 Dec '12

Hello! How can I have a "framed text" that can cross page boundaries? Cheers, André Caldas.

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Odd /externalfigure behavior
by Guy Stalnaker 21 Dec '12

21 Dec '12

All, I've been working on a document for weeks and it's been compiling fine. I have a pdf copy from yesterday afternoon at 4p local time, the last time it compiled successfully. I was doing a search/replace on some /crlf to add space between text and an image. The search/replace with Gnome's gedit included \n in both search and replace string. Suddenly context will no longer successfully compile the document! What's very, very odd, is that the context document is an output file from pandoc of a markdown document that has had no issues until now. If I go back now to the original markdown doc and regenerate the context document the issue persists with or without subsequent edit!! Damned peculiar. Here's the workflow: pandoc -s -f markdown -t context <file.md> -o <file.context.tex> gedit <file.context.tex> to add: \defineexternalfigure[screenshot][frame=on] and then add [screenshot] to all of the \externalfigure directives. Then find the /crlf that appear immediate before *all* of the \externalfigure directives and double them (unless someone who reads this can tell me how to easily modify the padding of an image when it's placed to increase the spacing between the image and the text above it). I've been doing this for many days. Until late yesterday afternoon. Now context spits out this: <quote> structure > sectioning > subsubsubsection @ level 6 : 0.0.0.1.3.1 -> One URL for All Projects ! LuaTeX error /usr/share/texmf/tex/context/base/l-file.lua:219: bad argument #1 to 'find' (string expected, got nil) stack traceback: [C]: in function 'find' /usr/share/texmf/tex/context/base/l-file.lua:219: in function 'collapsepath' /usr/share/texmf/tex/context/base/grph-inc.lua:373: in function 'forbiddenname' /usr/share/texmf/tex/context/base/grph-inc.lua:387: in function </usr/share/texmf/tex/context/base/grph-inc.lua:385> (tail call): ? /usr/share/texmf/tex/context/base/grph-inc.lua:735: in function 'identifier' /usr/share/texmf/tex/context/base/grph-inc.lua:753: in function 'identify' <main ctx instance>:1: in main chunk. system > tex > error on line 330 in file v10TrainingGeneralClassEndUser.contex.tex: LuaTeX error ... 320 How You Get Access 321 \stopitemize 322 323 \subsubsubsection[one-url-for-all-projects]{One URL for All Projects} 324 325 A {\em project} in WiscWebCMS is the equivalent of a web site. You may 326 have access to multiple projects. For all projects you login at 327 \useURL[url2][https://wiscwebcms.wisc.edu][][https://wiscwebcms.wisc.edu]\from[url2]. 328 With WiscWeb CMS you are logging into a web application to edit your 329 site.\crlf 330 >> {\externalfigure[images/group54/26378/CMSLogin.jpg]} 331 332 \subsubsubsection[selecting-your-project]{Selecting Your Project} 333 </quote> That happens at the very first \externalfigure in the document. The specific error is: ! LuaTeX error /usr/share/texmf/tex/context/base/l-file.lua:219: bad argument #1 to 'find' (string expected, got nil) Wah? I can successfully use display from the commandline in the same dir as the context file on that path shown in the quoted output and it opens the image. So, it's not the image file or the path--they are both fine. Any ideas anyone? -- "There is only love, and then oblivion. Love is all we have to set against hatred." (paraphrased) Ian McEwan Guy Stalnaker, I^2@DOIT, 1210 West Dayton Street, Room 3209 CSS, Madison WI 53719-1220, jstalnak(a)wisc.edu, work 608.263.8035, cell 608.235.4718, fax 608.265.6681,

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