> Jeong Dal <mailto:haksan@me.com>
> 21. Januar 2016 um 15:55
> Thanks Hans, Wolfgang, Luigi
>
> The new beta with Luatex 0.88 makes \fieldstacks and \startanimation work.
> The following example of Wolfgang is now working well.
>
> \def\MyGraphics#1{%
\unexpanded\def\MyGraphics#1{%
> \startMPcode
> path p,q;
> p:=fullcircle scaled 72;
> L:=length p;
> N:=20;
> q:=subpath (0,#1/N*L) of p;
> draw q withcolor red;
> fill fullcircle scaled 3 shifted point length q of q withcolor blue;
> setbounds currentpicture to unitsquare shifted (-0.5,-0.5) scaled 75;
> \stopMPcode}
> \usemodule[animation]
> \setupinteraction[state=start]
>
> \starttext
> \startanimation[menu=yes]
> {\MyGraphics {5}}
> {\MyGraphics {10}}
> {\MyGraphics {15}}
> {\MyGraphics {20}}
> \stopanimation
>
> \stoptext
>
> One more question. Is there any convenient way to list 
> \MyGraphics{#1}? I tried \dorecurse, but it just display figures one 
> by one.  I also tried lua, but it stops with the error message 
>  “unexpected symbol near ‘\'”.
\startanimation[menu=yes]
\dorecurse{20}{\expanded{\startframe \MyGraphics{\recurselevel} \stopframe}}
\stopanimation

Wolfgang