So is there a way to circumvent these issues? Or an explanation for this behavior, so that I can try to find a solution by myself?

Thanks
Emanuel

On Nov. 29 2023, at 12:25 pm, Emanuel Han via ntg-context <ntg-context@ntg.nl> wrote:
> Dear Aditya and Fabrice,
> thanks for your responses.
>
> I included some of Fabrice's code into mine for testing purpose, and indeed the multipage works now.
> What is bizarre is that issues appear now that didn't appear before:
> Path A is drawn with color red on page 1, and in color black on all following pages, while it should stay red.
>
> textext(<text>, <pair>) is overwriting <text> with "T="&decimal(currentime) which has been used previously in textext() before the for k=1 endfor loop. This overwriting happens only for the first textext() which occurs inside the for k=1 endfor loop. All other textext() inside the for k=1 endfor loop are not drawn at all. If the line « draw textext("T="&decimal(currentime)) scaled 2 shifted(0,2in) withcolor magenta ; » is commented out, the first textext() inside the for k=1 endfor loop is not drawn neither. It must be an issue with textext(), because when I replace textext() by lmt_outline[], the text is drawn.
>
>
> Adjusted mwe:
>
> \enableregime[utf] % enable unicoded input
> \definefontfamily [RomanFont] [rm] [calluna]
> \definefontfamily [KoreanFont] [rm] [applemyungjo]
> \definefontfamily [JapaneseFont] [rm] [hannotatesc]
> \definefontfeature
> [fea]
> [mode=node,language=dflt,script=arab,
> init=yes,
> medi=yes,
> fina=yes,
> isol=yes,
> calt=yes,
> rlig=yes,
> tlig=yes,
> trep=yes,
> curs=yes,
> kern=yes,
> mark=yes
> ]
>
> \starttypescript [serif] [notonaskharabic]
> \definefontsynonym [notonaskharabic-Light] [name:notonaskharabic] [features=fea]
> \definefontsynonym [notonaskharabic-Bold] [name:notonaskharabic] [features=fea]
> \definefontsynonym [notonaskharabic-Italic] [name:notonaskharabic] [features=fea]
> \definefontsynonym [notonaskharabic-Bold-Italic] [name:notonaskharabic] [features=fea]
> \stoptypescript
>
> \starttypescript [serif] [notonaskharabic]
> \usetypescript[serif][fallback]
> \definefontsynonym [Serif] [notonaskharabic-Light] [features=fea]
> \definefontsynonym [SerifItalic] [notonaskharabic-Italic] [features=fea]
> \definefontsynonym [SerifBold] [notonaskharabic-Bold] [features=fea]
> \definefontsynonym [SerifBoldItalic] [notonaskharabic-Bold-Italic] [features=fea]
> \stoptypescript
>
> \starttypescript [notonaskharabic]
> \definetypeface [notonaskharabic] [rm] [serif] [notonaskharabic] [default]
> \stoptypescript
>
> \usetypescript[notonaskharabic]
> \setupbodyfont [RomanFont]
>
> \usecolors[crayola]
>
> \startMPinclusions
> picture p[];
> path TheFrame ;
> TheFrame := fullsquare scaled 5in ;
>
> z0 = (0,0);
> z1 = (60,40);
> z2 = (40,90);
> z3 = (10,70);
> z4 = (30,50);
> z5 = (90,70);
> z6 = (-10,70);
>
> path A; A = z0..z1..z2..z3..z4 ;
> pair AStartPoint; AStartPoint = point 0 of A;
> pair AEndPoint; AEndPoint = point 4 of A;
> path B; B = z5..z6;
> pair BStartPoint; BStartPoint = point 0 of B;
> pair BEndPoint; BEndPoint = point 1 of B;
> path C; C = AStartPoint..AEndPoint;
>
> p1:=image(
> draw A withcolor red;
> );
>
> p2:=image(draw A; label(lmt_outline [
> text = "\JapaneseFont 日本語"
> ], AEndPoint););
>
> p3:=image(
> label(textext("\notonaskharabic \textdir TRT دانگ") scaled 1.2, BStartPoint);
> );
>
> p4:=image(draw A; label(lmt_outline [
> text = "\KoreanFont 한국어"
> ], AStartPoint););
>
> p5:=image(
> label(textext("bāng"), BEndPoint);
> draw C withcolor green;
> );
>
> p6:=image(
> draw B withcolor blue;
> );
> \stopMPinclusions
>
> \starttext
> \dorecurse{6}{ % Frame
> \setupMPpage[background=color, backgroundcolor=SpringGreen]
> \startMPpage[pagestate=start]
> currentime := #1 ;
> % Just for learning :
> draw TheFrame withpen pencircle scaled .1in withcolor magenta ;
> draw textext("T="&decimal(currentime)) scaled 2 shifted(0,2in) withcolor magenta ;
> for k=1 upto currentime: draw p[k]; endfor
> setbounds currentpicture to TheFrame ;
>
> desiredformat := 1080;% In pixels (will be converted by default at 72dpi)
> currentpicture := currentpicture xysized (desiredformat ,desiredformat );
>
> \stopMPpage
> }
>
> \stoptext
> On Nov. 27 2023, at 11:25 pm, Aditya Mahajan <adityam@umich.edu> wrote:
> > On Mon, 27 Nov 2023, Fabrice L wrote:
> >
> > > Hi,
> > >
> > > It is fun fact very easy to do. You just use \startMPpage (…) \stopMPpage multiple times. Here is an example which build an animation of a particle moving according to a Brownian motion.
> >
> > A very similar option is to pass a variable to a metapost drawing. This is what I use:
> > https://adityam.github.io/context-blog/post/metapost-animation/
> > It only works when viewed in acrobat, you can just comment out the animation part and wrap it in \startTEXpage .. \stopTEXpage to get multi-page animation.
> > Aditya___________________________________________________________________________________
> > If your question is of interest to others as well, please add an entry to the Wiki!
> >
> > maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> > webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> > archive : https://github.com/contextgarden/context
> > wiki : https://wiki.contextgarden.net
> > ___________________________________________________________________________________
> >
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive : https://github.com/contextgarden/context
> wiki : https://wiki.contextgarden.net
> ___________________________________________________________________________________