Hi,
On Sat, 3 Jan 2026 at 21:16, Jeong Dal via ntg-context
<[email protected]> wrote:
>
> Dear Florent and Wolfgang,
>
> Thank you so much.
>
> Both of your method work well.
>
> I have another question.
>
> path p;
> P := z1—z2—z3—cycle;
> drawarrow p;
>
> It draw arrowhead at the last edge only.
> To draw arrowhead of each edge, I draw edges one by one.
> Is there a simple way to draw arrowhead of each edge?
You can just loop through the path:
\startMPpage[offset=1DK]
path p ;
numeric N ; N := 20 ;
for i = 1 upto N :
z[i] = 1cm*dir(360*i/N) ;
endfor
path p ;
p := for i = 1 upto N : z[i] -- endfor cycle ;
drawarrow p withpen pencircle scaled 3
withcolor darkblue ;
for i = 1 upto N :
drawarrow (point i - 1 of p -- point i of p)
withpen pencircle scaled 1
withcolor darkred ;
endfor
for i within p :
drawarrow (deltapoint - 1 -- pathpoint)
withpen pencircle scaled .5
withcolor darkyellow ;
endfor
\stopMPpage
The second method is likely a bit faster if you have a long path.
/Mikael
>
> Thanks again.
>
> Best regards,
>
> Dalyoung
>
>
> 2026. 1. 4. 오전 1:22, Wolfgang Schuster <[email protected]> 작성:
>
> Am 03.01.2026 um 16:32 schrieb Jeong Dal via ntg-context:
>
> Dear all,
> First, Happy New Year!
> I tried to draw a small figure using the following MetaFun code.
> The problem is the last line.
> If I run \processMPbuffer[sampleGraph] then it works well and draw the
> figure.
> But, if I add another buffer name like
> \processMPbuffer[sampleGraph, edgeLabel]
> Or
> \processMPbuffer[sampleGraph, multiGraph]
> Then an error occurred. In the log file, I found that
> metafun > log > error: Not implemented: (pair)*(color)
> metafun > log >
> metapost > trace > <error> (0.30901699437494745,0.95105651629515353)
> metapost > trace > <to be read again> ;
> metapost > trace > <for(1)> z [ (EXPR 0) ] = dir ( 360 * (EXPR 0) /
> (5) + (0) ) * ((0,0,0)) ; ENDFOR
> As you see here, 'mySize = (0,0,0)' not ‘2cm'.
> I don’t see what is the problem.
> Thank you for your reading.
> Best wishes,
> Dalyoung
> [...]
> \startbuffer[sampleGraph]
> setPoints(5,\MPvar{mySize},0);
>
>
> setPoints(5,\MPrawvar{sampleGraph}{mySize},0);
>
> Wolfgang
>
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>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the
> Wiki!
>
> maillist : [email protected] /
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> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : [email protected] /
https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
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