Hi,
Adding to my previous message, if you are looking for an animation of the wave
equation for a string with fixed endpoints, one has to use something like the
following:
% begin wave-sine-string.tex
\usemodule[animation]
\setupinteraction[state=start]
\starttext
\startTEXpage[offset=2pt]
\startanimation[menu=yes,framerate=10]
\dorecurse{101}{\expanded
{\startframe
\startMPcode
numeric u, omega, mylength, tt, N ;
u := 2cm ;
omega := 4 ;
mylength := 3.141596 ;
tt := \recurselevel - 1 ;
N := 500 ; % number of steps
path p ;
p := (0u,0u) for i = 1 upto N :
--
(((mylength/N)*i)*u,cos(omega*(mylength/N)*tt)*sin(omega*(mylength/N)*i)*u)
endfor ;
draw p withpen pencircle scaled .5pt withcolor darkred ;
\stopMPcode
\stopframe}
}
\stopanimation
\stopTEXpage
\stoptext
% end wave-sine-string.tex
Best regards: OK
> On 21 Jul 2021, at 19:44, Jeroen <context...@gmail.com> wrote:
>
> 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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>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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> ___________________________________________________________________________________
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the
> Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
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