From: Fabrice L <fabrice.alpha@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 11:19:59 -0500 [thread overview]
Message-ID: <2E697629-C737-4158-94F7-F7335A6F58B3@gmail.com> (raw)
In-Reply-To: <006445B7-7C42-464A-BE91-34393DA44343@gmail.com>
Hi,
> Le 9 déc. 2020 à 10:57, Otared Kavian <otared@gmail.com> a écrit :
>
> Hi,
>
> I have a silly question: given two points in the plane
> z1 = (1cm,3cm) ;
> z2 = (5cm, 9cm) ;
> the command
> draw z1 -- z2 withpen pencircle scaled .5pt ;
> draws the line segment joining z1 and z2. How could I draw the line segment which goes a little further (say 1cm) than both the end points of this segment (that is in this example, a point before z1 and a point after z2 on the straight line) .
> Indeed it is possible to write the equation of the line and then compute by hand the coordinates of the new end points, but I think there is a simpler way in Metafun to do this.
The shortened operation is the solution ! See MetaFun manual section 1.18
\starttext
\startMPpage
z1 = (1cm,3cm) ;
z2 = (5cm, 9cm) ;
draw (z1--z2) shortened -1cm withcolor blue ;
draw (z1--z2) withcolor red ;
\stopMPpage
\stoptext
Fabrice.
>
> Thanks for any help: Otared
>
>
> ___________________________________________________________________________________
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next prev parent reply other threads:[~2020-12-09 16:19 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 [this message]
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
2020-12-09 22:01 ` Hans Hagen
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