> On 21 Feb 2019, at 10:03, Damien Thiriet <dam...@thiriet.web4me.fr> wrote:
>
> Hi,
>
>
> Why does (1) compile, whereas (2) doesn’t?
For me, both compile. However (2) does not work.
1. Variable names x and y are special and cleared before
every graphic. This is related to the fact that “z" is
defined as a shortcut for "(x,y)”. Both of these are
traditional.
Every metapost graphic does at least this at its start:
save x,y;
currentpicture := nullpicture;
currentpen:=defaultpen;
so pair xx[]; would have worked just fine.
In general, I would advice to stay away from single-letter
variable names inside MPinclusions, and use CamelCase
to avoid clashes with metafun internals.
2. You need a bigger pen to actually see the dots even if
you change the variable name. :)
Best wishes,
Taco
> I can't understand why can MPinclusions store path and not pairs.
>
>
> %%%%%%%%%%%% (1) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \setuppapersize[A4,landscape]
>
> \startMPinclusions
> u:=1mm ;
> %fond
> path p ;
> p:= (0,0) -- (150u,0) -- (150u,95u) -- (0,95u) -- cycle ;
> pair x[] ;
> x[0]:= (20u,90u) ;
> x[1]:= (40u,90u) ;
> x[2]:= (90u,90u) ;
> x[3]:= (140u,90u) ;
> \stopMPinclusions
>
> \startreusableMPgraphic{test}
> draw p ;
> \stopreusableMPgraphic
>
> \starttext
> \reuseMPgraphic{test}
> \stoptext
>
> %%%%%%%%%%%% (1) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \setuppapersize[A4,landscape]
>
> \startMPinclusions
> u:=1mm ;
> %fond
> path p ;
> p:= (0,0) -- (150u,0) -- (150u,95u) -- (0,95u) -- cycle ;
> pair x[] ;
> x[0]:= (20u,90u) ;
> x[1]:= (40u,90u) ;
> x[2]:= (90u,90u) ;
> x[3]:= (140u,90u) ;
> \stopMPinclusions
>
> \startreusableMPgraphic{test}
> draw p ;
> for i=0 step 1 until 3 :
> drawdot x[i] ;
> endfor ;
> \stopreusableMPgraphic
>
> \starttext
> \reuseMPgraphic{test}
>
>
> More generaly, which kind of variables cannot be stored in
> \startMPinclusions ?
>
> Thanks,
>
>
> Damien Thiriet
> ___________________________________________________________________________________
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> ___________________________________________________________________________________
Taco Hoekwater
Elvenkind BV
___________________________________________________________________________________
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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