From: Otared Kavian <otared@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Metafun: how to draw a straight line past the end points
Date: Wed, 9 Dec 2020 22:19:05 +0100 [thread overview]
Message-ID: <48A1FF0A-BD79-406D-AB58-D0067A498103@gmail.com> (raw)
In-Reply-To: <nycvar.YAK.7.78.908.2012091521020.368852@nqv-guvaxcnq>
Thanks Aditya!
One can learn a lot with your answers !
In the Metafun manual I see enlonged but I did not know to use it.
Best regards: Otared
> On 9 Dec 2020, at 21:38, Aditya Mahajan <adityam@umich.edu> wrote:
>
> On Wed, 9 Dec 2020, Otared Kavian wrote:
>
>> Hi Aditya,
>>
>> Thanks for the alternative method, which comes handy if one wishes to extend the straight line by a different amount at either end:
>>
>> \starttext
>> \startMPcode
>> z1 = (1cm,3cm) ;
>> z2 = (5cm, 9cm) ;
>> z3 = 1cm * dir(angle (z2 - z1)) shifted z2 ;
>> z4 = -.5cm*dir(angle(z2 - z1)) shifted z1 ;
>> draw z1 -- z3 ;
>> draw z4 -- z1 ;
>> draw z1 -- z2 withcolor red ;
>> \stopMPcode
>> \stoptext
>
> Or just redefine shortened to accept a pair!
>
> \startMPdefinitions
> primarydef p shortened d =
> reverse ( ( reverse (p enlonged -xpart paired(d)) ) enlonged -ypart paired(d) )
> enddef ;
> \stopMPdefinitions
>
>
>
> \starttext
> \startMPpage
> z1 = (1cm,3cm) ;
> z2 = (5cm, 9cm) ;
> draw (z1--z2) shortened (-1cm,-2cm) withcolor blue ;
> draw (z1--z2) withcolor red ;
>
> \stopMPpage
> \stoptext
>
> Now that if you really want to shorten a path, then cutends works better than shortened
>
> \startMPdefinitions
> primarydef p shortened d =
> reverse ( ( reverse (p enlonged -xpart paired(d)) ) enlonged -ypart paired(d) )
> enddef ;
> \stopMPdefinitions
>
>
> \starttext
> \startMPpage
> z1 = (1cm,3cm) ;
> z2 = (5cm, 9cm) ;
> path p, q;
> p := z1 {up} .. {right} z2;
> q := p shifted (6cm, 0);
>
> draw p withcolor red ;
> draw p shortened (1cm,2cm) withcolor blue ;
>
> draw q withcolor green ;
> draw q cutends (1cm,2cm) withcolor blue ;
>
> \stopMPpage
> \stoptext
>
> Aditya
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
___________________________________________________________________________________
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:[~2020-12-09 21:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-09 15:57 Otared Kavian
2020-12-09 16:19 ` Fabrice L
2020-12-09 17:11 ` Otared Kavian
2020-12-09 17:37 ` Aditya Mahajan
2020-12-09 19:34 ` Otared Kavian
2020-12-09 20:38 ` Aditya Mahajan
2020-12-09 21:19 ` Otared Kavian [this message]
2020-12-09 22:01 ` Hans Hagen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=48A1FF0A-BD79-406D-AB58-D0067A498103@gmail.com \
--to=otared@gmail.com \
--cc=ntg-context@ntg.nl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).