I am looking for a sine animation as the one file f.pdf on this site

http://www.12000.org/my_notes/Mathematica_animation_into_PDF_using_latex/index.htm

Jeroen

Op wo 21 jul. 2021 om 17:54 schreef Fabrice L <fabrice.al...@gmail.com>:

> Hi,
>
> Le 21 juill. 2021 à 10:08, Jeroen <context...@gmail.com> a écrit :
>
> I use this small animation to enlarge a circle
>
>
> \usemodule[animation]
> \setupinteraction[state=start]
> \starttext
> \startanimation[menu=yes,framerate=10]
> \dorecurse{7}{\expanded
>   {\startframe
>     \startMPcode
>     path p;
>     numeric n, u;
>     u := 1cm;
>     n:=\recurselevel*u;
>     p := fullcircle scaled n;
>     draw p;
>     \stopMPcode
>   \stopframe}}
> \stopanimation
> \stoptext
>
>
> This I use to draw a sine
>
>
> \starttext
> \startMPcode
>   draw(-90/360*1.5cm,-0.9cm) for i = -90 upto 630: ..
> (i/360*1.5cm,0.9cm*(sind(i)))endfor;
> \stopMPcode
> \stoptext
>
>
> When I put it together to animate the sine as following, it does not
> entirely create the sine animation I am looking for
>
>
> \usemodule[animation]
> \setupinteraction[state=start]
> \starttext
> \startanimation[menu=yes,framerate=10]
> \dorecurse{7}{\expanded
>   {\startframe
>     \startMPcode
>     path p;
>     numeric n, u;
>     u := 1cm;
>     n:=\recurselevel*u;
>     p := (-90/360*1.5cm,-0.9cm) for i = -90 upto 630: ..
> (i/360*1.5cm,0.9cm*(sind(i))) endfor shifted (n,0);
>     draw p;
>     \stopMPcode
>     \stopframe}}
> \stopanimation
> \stoptext
>
>
> What better way can I create a sine animation with Metapost?
>
>
>
>
> Here is another way to do your animation. This is doing something, but I
> guess not what you want. Could you describe what do you have in mind ?
>
> \starttext
> \dorecurse{7}{ % 3180
> \startMPpage
> myvariable := #1 ;
> path p;
>     numeric n, u;
>     u := 1cm;
>     n:=myvariable*u;
>     p := (-90/360*1.5cm,-0.9cm) for i = -90 upto 630: ..
> (i/360*1.5cm,0.9cm*(sind(i))) endfor shifted (n,0);
>     draw p;
> \stopMPpage
> }
> \stoptext
>
> Fabrice.
>
>
>
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>
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