Oh, cool. I've found some info in the Metafun manual too. I should read
more carefully next time.
Thank you very much!

Jairo :)

El mar., 3 de nov. de 2020 a la(s) 07:29, Hans Hagen (j.hagen@xs4all.nl)
escribió:

> On 11/3/2020 12:59 PM, Jairo A. del Rio wrote:
> > Hi everyone. I want to know if nowadays (2020) Metafun is able to do an
> > actual unfill, like above:
> >
> >
> https://tex.stackexchange.com/questions/151068/how-can-i-fill-a-complex-path-with-metapost-metafun/218718#218718
> >
> > Example of what I want to do:
> >
> > \startMPpage
> >
> > path A, B, C;
> >
> > A := unitcircle shifted (-center unitcircle);
> >
> > A := A scaled 4cm;
> >
> > B := unitcircle shifted (-center unitcircle);
> >
> > B := B scaled 1cm;
> >
> > %C := (reverse B) shifted (left*1.4cm);
> >
> > %It works for two paths
> >
> > fill (reverse B)-- A -- cycle withcolor red;
> >
> > %fill A -- (reverse B) -- C -- cycle withcolor red;
> >
> > %When I try the same with three paths, a thin, unwanted line appears
> >
> > \stopMPpage
> >
> > I'm aware of unfill and I've read somewhere else about using pens
> > instead, but I want to know if a better solution is possible. Thank you
> > in advance.
>      \startMPpage
>          path A; A := (unitcircle shifted (-center unitcircle)) scaled 4cm;
>          path B; B := (unitcircle shifted (-center unitcircle)) scaled 1cm;
>          path C; C := B shifted (left*1.4cm);
>
>          nofill A; nofill B; eofill C;
>      \stopMPpage
>
> to be wikified
>
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>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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