On 05/24/2018 10:23 PM, Alan Braslau wrote: > On Thu, 24 May 2018 21:01:59 +0200 > Pablo Rodriguez <[email protected]> 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).
I thought origin had to be explicitly set. > (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. Well, I need to refresh my math from high school (centuries ago :-)) to remember what cosine and sine are. Many thanks for your explanation, Pablo -- http://www.ousia.tk ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : [email protected] / 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 ___________________________________________________________________________________
