> Am 20.10.2014 um 13:32 schrieb Jeong Dal <hak...@me.com>:
>
> Hi,
>
> I tested the following simple code to generate enlarging circles as a test of
> animation.
> But it just draw 5 circles in a row.
>
> \usemodule[animation]
> \setupinteraction[state=start]
> \startbuffer[Circles]
> numeric u; u:= 1cm;
> draw fullcircle scaled \MPrawvar{Circles}{s}u;
> \stopbuffer
> \starttext
> \startanimation
> { \dorecurse{5}{%
> \setupMPvariables[Circles][s=\recurselevel]
> \processMPbuffer [Circles]
> }}
> \stopanimation
> \stoptext
>
> It seems to me that \startanimation just treat the figures
> {\dorecurse … } as just one figure.
>
> Is there a way to treat it 5 figures to generate animation?
>
> Thank you for reading.
1. You have to expand the \recurselevel value.
2. Don’t put braces around \dorecurse because when \startanimation sees a
opening braces it assumes you want to put each frame into a group of braces.
Variant 1:
\usemodule[animation]
\setupinteraction[state=start]
\startbuffer[Circles]
numeric u; u:= 1cm;
draw fullcircle scaled \MPrawvar{Circles}{s}u;
\stopbuffer
\starttext
\startanimation
\dorecurse{5}
{\startexpanded
\startframe
\setupMPvariables[Circles][s=\recurselevel]
\processMPbuffer [Circles]
\stopframe
\stopexpanded}
\stopanimation
\stoptext
Variant 2:
\usemodule[animation]
\setupinteraction[state=start]
\startuseMPgraphic{Circles}{s}
numeric u; u:= 1cm;
draw fullcircle scaled \MPvar{s}u;
\stopuseMPgraphic
\starttext
\startanimation
\dorecurse{5}
{\startexpanded
\frame{\useMPgraphic{Circles}{s=\recurselevel}}%
\stopexpanded}
\stopanimation
\stoptext
Wolfgang
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