From: Alan Braslau <braslau.list@comcast.net>
To: Pablo Rodriguez <oinos@gmx.es>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: question about MP drawing with dir
Date: Thu, 24 May 2018 14:23:23 -0600 [thread overview]
Message-ID: <20180524142323.23520d1b@poo.hsd1.co.comcast.net> (raw)
In-Reply-To: <838666be-6ec5-317b-044a-d4d933b41455@gmx.es>
On Thu, 24 May 2018 21:01:59 +0200
Pablo Rodriguez <oinos@gmx.es> wrote:
> dir seems magic to me. I don’t understand how it works, not even how
> it can be used for drawing not having an origin.
All MP drawings have an origin (0,0).
(dir angle) returns a pair on a unit circle surrounding the origin, i.e.
(cosd angle,sind angle) where cosd is the cosine function operating on
an angle in degrees.
Alan
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next prev parent reply other threads:[~2018-05-24 20:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-24 19:01 Pablo Rodriguez
2018-05-24 19:33 ` Hans Hagen
2018-05-24 19:41 ` Hans Hagen
2018-05-25 17:41 ` Pablo Rodriguez
2018-05-24 20:23 ` Alan Braslau [this message]
2018-05-25 17:58 ` Pablo Rodriguez
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