Re: Trouble making basic MetaPost graphics using ConTeXt Minimals

[luigi scarso <luigi.scarso@gmail.com>]

On Fri, Jul 15, 2011 at 2:59 AM, Kevin D. Robbins
<krobbins@alumni.princeton.edu> wrote:
> Using a fresh install of ConTeXt Minimals today (ConTeXt version
> 2011.07.14 16:09, luatex version beta-0.70.1-2011051918) I am trying
> to build the following MetaPost graphics:
>
> ---8<--- file: test.mp
> fontmapfile "=lm-math.map" ;
>
> beginfig(1)
>  draw fullcircle scaled 3cm ;
> endfig ;
>
> beginfig(2) ;
>  fill fullcircle scaled 5cm withcolor red ;
> endfig ;
>
> beginfig(3);
>  numeric u;
>  u = 1cm;
>  draw (0,2u)--(0,0)--(4u,0);
>  pickup pencircle scaled 1pt;
>  draw (0,0){up}
>    for i=1 upto 8: ..(i/2,sqrt(i/2))*u endfor;
>  label.lrt(btex $\sqrt x$ etex, (3,sqrt 3)*u);
>  label.bot(btex $x$ etex, (2u,0));
>  label.lft(btex $y$ etex, (0,u));
> endfig;
>
> end .
> ---8<---
>
> Building the file using "mpost test.mp" I get the following:
>
> This is MetaPost, version 1.504 (kpathsea version 6.0.0)
> (mpost.mp (/opt/tools/ConTeXt/beta/tex/texmf/metapost/base/plain.mp
> Preloading the plain mem file, version 1.004))
> (./test.mp{pdftex.map}{lm-math.map} [1]
> [2]/opt/tools/ConTeXt/beta/tex/texmf-context/scripts/context/ruby/base/switch.rb:570:in
> `locateseries': undefined method `each' for "tex":String
> (NoMethodError)
>        from /opt/tools/ConTeXt/beta/tex/texmf-context/scripts/context/ruby/base/switch.rb:397:in
> `block in expand'
>        from /opt/tools/ConTeXt/beta/tex/texmf-context/scripts/context/ruby/base/switch.rb:392:in
> `each'
>        from /opt/tools/ConTeXt/beta/tex/texmf-context/scripts/context/ruby/base/switch.rb:392:in
> `expand'
>        from /opt/tools/ConTeXt/beta/tex/texmf-context/scripts/context/ruby/texexec.rb:789:in
> `<main>'
>
>
>>> test.mp
>>> test.mpx
> ! Unable to make mpx file.
> l.18   label.lrt(btex
>                      $\sqrt x$ etex, (3,sqrt 3)*u);
> 2 output files written: test.1 .. test.2
>
> The first two graphics are produced correctly, but there is no output
> for the third graphic with the labels.
>
> Building the file using "texexec --mptex test.mp" all three graphics
> are produced, but the label $\sqrt x$ does not produce the square root
> symbol.
>
> Am I doing something obviously wrong? Can anyone reproduce this?
>
> Thanks,
>
> Kevin
> ___________________________________________________________________________________
> 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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> ___________________________________________________________________________________
>
This is one of the preferrred way to deal with metapost in mkiv
\starttext
\startMPpage
numeric u;
 u = 1cm;
 draw (0,2u)--(0,0)--(4u,0);
 pickup pencircle scaled 1pt;
 draw (0,0){up}
   for i=1 upto 8: ..(i/2,sqrt(i/2))*u endfor;
 label.lrt(btex $\sqrt x$ etex, (3,sqrt 3)*u);
 label.bot(btex $x$ etex, (2u,0));
 label.lft(btex $y$ etex, (0,u));
\stopMPpage
\stoptext

It's ok with latest minimals
-- 
luigi
___________________________________________________________________________________
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
___________________________________________________________________________________