From: Alan Braslau <braslau.list@comcast.net>
To: Hans Hagen <pragma@wxs.nl>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Metafun: setting pen size in properties
Date: Mon, 24 Jul 2017 10:58:11 -0600 [thread overview]
Message-ID: <20170724105811.7dc1c924@zoo.hsd1.co.comcast.net> (raw)
In-Reply-To: <66846094-ca3a-4e8d-89a2-f7423893f0a9@wxs.nl>
On Mon, 24 Jul 2017 10:26:25 +0200
Hans Hagen <pragma@wxs.nl> wrote:
> On 7/24/2017 1:40 AM, Aditya Mahajan wrote:
> > Hi,
> >
> > Is it possible to set pen width using properties(...)? The
> > following does not work (the color is set, but not the pen width):
> >
> > \starttext
> > \startMPcode
> > property p[] ;
> > p[1] := properties(withcolor red withpen pencircle scaled 1bp);
> > p[2] := properties(withcolor blue withpen pencircle scaled 10bp);
> >
> > draw fullcircle scaled 1cm withproperties p[1];
> > draw fullcircle scaled 2cm withproperties p[2];
> > \stopMPcode
> > \stoptext
>
> def withproperties expr p =
> if colormodel p = 3 :
> withcolor greypart p
> elseif colormodel p = 5 :
> withcolor (redpart p,greenpart p,bluepart p)
> elseif colormodel p = 7 :
> withcolor (cyanpart p,magentapart p,yellowpart p,blackpart p)
> fi
> withpen penpart p
if dashpart p <> nullpicture :
dashed dashpart p
fi
> withprescript prescriptpart p
> withpostscript postscriptpart p
> enddef ;
>
>
>
> > Also, what is the advantage of using properties over a simple def?
> > (except that I cannot def a suffixed variable). For example:
> >
> > \starttext
> > \startMPcode
> > def qA = withcolor red withpen pencircle scaled 1bp enddef;
> > def qB = withcolor blue withpen pencircle scaled 10bp enddef;
> >
> > draw fullcircle scaled 1cm qA;
> > draw fullcircle scaled 2cm qB;
> >
> > \stopMPcode
> > \stoptext
> abstraction ..
>
> -----------------------------------------------------------------
> 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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If your question is of interest to others as well, please add an entry to the Wiki!
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next prev parent reply other threads:[~2017-07-24 16:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-23 23:40 Aditya Mahajan
2017-07-24 0:13 ` Alan Braslau
2017-07-24 8:26 ` Hans Hagen
2017-07-24 16:58 ` Alan Braslau [this message]
2017-07-25 17:34 ` Aditya Mahajan
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