ntg-context February 2015

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44 participants
113 discussions

Code that run in Metapost but not in starMPcode enviroment
by Akira Kakuto 01 Feb '15

01 Feb '15

> What is wrong with this code? Interestingly it seems to work in mkii, probably because mkii calls external metafun: context --pdftex --passon=--shell-escape test.tex test.pdf is attached. Best, Akira

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Code that run in Metapost but not in starMPcode enviroment
by DesdeChaves 01 Feb '15

01 Feb '15

I'm trying to draw some random arrows using Metapost. For that I use a piece of code from fpast that in found at stackexchange <http://tex.stackexchange.com/questions/179745/generating-random-arrows-in-t…> Unfortunately this code does not work in context (request for a solution <http://tex.stackexchange.com/questions/225864/metapost-error-related-with-c…>) because the freelabel() function. If I disable it the result is the expected. What is wrong with this code? \starttext \startMPcode numeric u, nb_vectors, wd; u := 1cm; % unit length nb_vectors := 20; wd = .5; boolean intersect; pair random_origin; color random_color; path candidate, random_vector[]; % vardef bb(expr p) = save orig, extr; pair orig, extr; orig = point 0 of p; extr = point 1 of p; pair v,w; v = wd*unitvector(extr-orig)*u; w = v rotated 90; (orig - v + w) -- (extr + v + w) -- (extr + v - w) -- (orig - v - w) -- cycle enddef; % pickup pencircle scaled 2bp; i = 1; forever: exitunless (i <= nb_vectors); intersect := false; random_length := u*(2+uniformdeviate(1)); random_angle := uniformdeviate(359); random_origin := u*(uniformdeviate(wd*nb_vectors), uniformdeviate(wd*nb_vectors)); random_color := (uniformdeviate(1), uniformdeviate(1), uniformdeviate(1)); candidate := random_origin -- (random_origin + random_length*dir(random_angle)); j := 1; forever: exitif (j = i) or (intersect = true); if bb(random_vector[j]) intersectiontimes bb(candidate) <> (-1, -1): intersect := true; fi; j := j+1; endfor; if intersect = false: random_vector[i] = candidate; drawarrow candidate withcolor random_color; freelabel(btex $v$ etex, point .5 of candidate, point .5 of candidate + dir (random_angle + 90)); i := i+1; fi; endfor; \stopMPcode \stoptext

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More headache with \setuphead
by Rob Heusdens 01 Feb '15

01 Feb '15

Related post: section with \sethupead[section][alternative=text]; other type of section misbehaves.. Hello list, It seems I have more problems with \setuphead, which I can't get hold on. This time content misbehaves in way I can't understand. Here are the relevant definitions/commands: \setuphead[chapter] [header=nomarking, command=\MyChapterCommand, aligntitle=yes, align={flushleft,nothyphenated,verytolerant}] \setuphead[content] [command=, textcommand=\MyContentCommand] What I expect this set of definitions to do is to indeed perform \MyChapterCommand for a chapter to typeset the title of a chapter. For the table of contents, I hoped that it would not do the command, which I set for chapter (by clearing that option with =,), and instead perform the textcommand \MyContentCommand. However from my output it is clear that the table of content still does \MyChapterCommand. As a workaround, I postponed setting \setuphead for chapter till after the content. But why does this not work? Even if content is supposedly doing the same thing as chapter does, it I make thereafter changes to content, and in fact "undo" the command setting and instead direct it to perform a textcommand, I don't expect it to still perform \MyChapterCommand. But it does that. Below the definitions for both commands: \define[1]\MyContentCommand% {\framed[frame=off,offset=none,frameoffset=0pt] {\vbox{\blank[4cm]\Word{#1}}}} \define[2]\MyChapterCommand% {\framed[frame=off,offset=none,frameoffset=0pt] {\vbox{\blank[4cm]{\small \headtext{chapter} #1}\blank\unhyphenated{#2}}}} Can anyone advise? Thanks, Rob

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ntg-context February 2015