From: Adam Reviczky <reviczky@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: metafun 2
Date: Sat, 17 Aug 2019 00:31:38 +0100 [thread overview]
Message-ID: <CABaoHus5bg=sCtkqqJ5UdZ7w=ekb=KCO=vNo75cpifrczLc7dQ@mail.gmail.com> (raw)
In-Reply-To: <174f2ea4-37ef-046c-198b-a9c7b3912e4a@xs4all.nl>
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Hi Hans,
One MetaPost feature that I was looking forward to is the ability to create
a fill between two shapes.
Something like a difference function of two path's.
For logos I use the workaround with creating a path alongside the excluded
areas but it is always cumbersome.
I have briefly mentioned it back here:
https://mailman.ntg.nl/pipermail/ntg-context/2011/056910.html
Just for illustration purposes, if I wanted to fill the area in between two
circles:
*path p ;
**p := fullcircle scaled 1cm ;
**path q ;
**q := fullcircle scaled .5cm ;
*
Instead of creating a new path along both circles with:
*r := p -- reverse q -- cycle ;*
It would be nice to have something like:
*fill p excluding q ;*
or something like that.
I mainly have use-cases for differences in shapes, but filling the
intersection of two shapes would be the same idea.
Thanks,
Adam
On Wed, Aug 14, 2019 at 10:57 AM Hans Hagen <j.hagen@xs4all.nl> wrote:
> Hi,
>
> In the process of providing an additional (more abstract) interface to
> some of the old and also new MetaFun code we wonder what kind of
> features users would like to see.
>
> http://www.pragma-ade.com/general/magazines/mag-1104-mkiv.pdf
>
> As a teaser I uploaded a MyWay document that shows some of what is
> coming. All is experimental but it shows the direction. We're talking
> ConTeXt LMTX here. For instance,
>
> draw lmt_outline [
> content = "hello",
> kind = "reverse",
> fillcolor = "darkred",
> drawcolor = "darkblue",
> rulethickness = 1/2,
> ] ysized h shifted (3.75h,-1.25h) ;
>
> Wraps all the outline drawing in one macro with a set of options (there
> will be xml interface definitions for that). Or take:
>
> draw lmt_followtext [
> content = "How well does it work {\bf 1}! ",
> path = (fullcircle scaled 4cm),
> trace = true,
> spread = true,
> ] ysized 5cm ;
>
> which is an easier interface to text along a curve. Arrows can be drawn
> with
>
> draw lmt_arrow [
> kind = "draw",
> location = "middle",
> alternative = "curved",
> path = fullcircle
> scaled 3cm
> shifted (3.5cm,0cm),
> ] withcolor "darkblue" ;
>
> but of course the low level interface with its many variables for
> tweaking stays around. Other examples are shown in the mentioned document.
>
> So the question is: What do you miss in metapost support? Of course it
> should fit within the concept, so 'artistic freehand drawings' is not
> something that is likely to get interfaced. We are particularly
> interested in educational applications, if only because ConTeXt started
> out that way.
>
> Hans
>
>
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
> ___________________________________________________________________________________
> 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
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> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
>
> ___________________________________________________________________________________
>
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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
___________________________________________________________________________________
next prev parent reply other threads:[~2019-08-16 23:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 9:54 Hans Hagen
2019-08-14 10:18 ` Henri Menke
2019-08-14 11:16 ` Hans Hagen
2019-08-14 11:31 ` Floris van Manen
2019-08-14 11:53 ` Hans Hagen
2019-08-15 6:05 ` Arthur Reutenauer
2019-08-14 14:22 ` Otared Kavian
2019-08-14 14:49 ` Hans Hagen
2019-08-14 14:53 ` Aditya Mahajan
2019-08-14 14:58 ` Otared Kavian
2019-08-14 15:11 ` Wolfgang Schuster
2019-08-14 15:34 ` Hans Hagen
2019-08-14 14:58 ` Mikael P. Sundqvist
2019-08-14 15:37 ` Hans Hagen
[not found] ` <CAHy-LL9D5NB6qZYj+QynCWR-rqk6suD3reepLUgO8KOwrjwnXA@mail.gmail.com>
2019-08-19 19:20 ` Fwd: " Mikael P. Sundqvist
2019-08-16 23:31 ` Adam Reviczky [this message]
2019-08-17 1:27 ` Alan Braslau
2019-08-17 8:52 ` Hans Hagen
2019-08-17 18:12 ` Adam Reviczky
2019-08-19 19:15 ` Jorge Manuel
2019-09-08 8:42 ` Aditya Mahajan
2019-09-08 10:09 ` Otared Kavian
2019-09-08 14:54 ` Aditya Mahajan
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