About filling paths, unfill, etc.

About filling paths, unfill, etc.

[Jairo A. del Rio]

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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.

Regards,

Jairo :)

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Re: About filling paths, unfill, etc.

[Hans Hagen]

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

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: About filling paths, unfill, etc.

[Jairo A. del Rio]

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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
>
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>

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archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
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