* Positioning an arrow between two values (Metapost)
@ 2015-01-17 11:09 Fabrice Couvreur
2015-01-21 1:35 ` Troy Henderson
0 siblings, 1 reply; 3+ messages in thread
From: Fabrice Couvreur @ 2015-01-17 11:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Hi,
I went from PSTricks to Metapost (Metafun) gradually. For positioning arrows
between two values in an array of variations, I used a command like this \
ncline {A}{B}, which avoids fumbling.
Can we do the same with Metapost ?
The idea would be to convert the value into a path or an image, much like in
the code below.
\starttext
\startMPcode
u:=1cm ;
path p, q ;
p=fullsquare scaled u ;
q=fullsquare scaled u shifted (4u,-2u) ;
draw p ;
draw q ;
drawarrow center p--center q ;
label(btex $5$ etex,center p) ;
label(btex $-2 $ etex,center q) ;
\stopMPcode
\stoptext
Best regards,
Fabrice
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* Re: Positioning an arrow between two values (Metapost)
2015-01-17 11:09 Positioning an arrow between two values (Metapost) Fabrice Couvreur
@ 2015-01-21 1:35 ` Troy Henderson
2015-01-21 17:46 ` Fabrice
0 siblings, 1 reply; 3+ messages in thread
From: Troy Henderson @ 2015-01-21 1:35 UTC (permalink / raw)
To: mailing list for ConTeXt users
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>
> \starttext
> \startMPcode
> u:=1cm ;
> path p, q ;
> p=fullsquare scaled u ;
> q=fullsquare scaled u shifted (4u,-2u) ;
> draw p ;
> draw q ;
> drawarrow center p--center q ;
> label(btex $5$ etex,center p) ;
> label(btex $-2 $ etex,center q) ;
> \stopMPcode
> \stoptext
>
How about something like below. I'm not sure exactly how ncline works in
PStricks, but this macro takes 4 arguments, namely a point, its
corresponding label, a second point, and its corresponding label.
\starttext
\startMPcode
vardef ncline (expr A,h,B,k) =
save p,q;
path p,q;
label(h,A);
p:=fullsquare scaled u shifted A;
draw p;
label(k,B);
q:=fullsquare scaled u shifted B;
draw q;
drawarrow (A--B) cutbefore p cutafter q;
enddef;
u:=1cm ;
ncline(origin,btex $5$ etex,(4*u,-2*u),btex $-2$ etex);
\stopMPcode
\stoptext
Troy Henderson
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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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
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* Re: Positioning an arrow between two values (Metapost)
2015-01-21 1:35 ` Troy Henderson
@ 2015-01-21 17:46 ` Fabrice
0 siblings, 0 replies; 3+ messages in thread
From: Fabrice @ 2015-01-21 17:46 UTC (permalink / raw)
To: ntg-context
Hi Troy,
Thank you, this macro is very nice ; it matches what I want to do even
if I would like a smaller space between the arrow and labels.
Best regards,
Fabrice
___________________________________________________________________________________
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 : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
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