Re: [NTG-context] Passing info from MetaPost to TeX
On 08/01/2010 12:16 PM, Oliver Buerschaper wrote:
Hi Taco,
Well, you could create a temporary file from withing the metapost
graphic, then read that file back on the TeX side, and then shift
the image vertically based on the info from that.
Could you give me a hint on how to parse such an auxiliary file in
TeX? I've never done any sort of that programming before...
You don't have to worry about parsing, just write something like
this in the metapost code:
write \string\def\string\MathAxis{ decimal (sqrt(3)*u/3) } to
info.tex;
Then \input info.
Best wishes,
Taco
___
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
___
Re: [NTG-context] Passing info from MetaPost to TeX
No answer :-( Does that mean it's impossible with current technology?
Oliver
is it possible to pass data from MetaPost back to TeX? This would be
similar in spirit to, say, the MetaPost variable BodyFontSize that contains
data from the TeX surrounding. Just the other way round.
maybe future mlib versions will provide something like that (writing
something from mp to a lua table); currently you have to use a file or
interpret the log (use show to print out values).
OK. What I have in mind is to vertically align a diagram with the math
axis... something like:
---
\startuseMPgraphic{diagram}
u := StrutHeight;
draw origin--(2u,0)--(u,sqrt(3)*u)--cycle;
% MathAxis at y-coordinate sqrt(3)*u/3
\stopuseMPgraphic
\starttext
\startformula
A\useMPgraphic{diagram}
=B
\stopformula
\stoptext
---
It would be great if the comment could be turned into a processing
instruction for ConTeXt such that the triangle's center of mass ends up on
the math axis of the formula.
What's the best way to achieve this?
Many thanks,
Oliver
___
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
___
Re: [NTG-context] Passing info from MetaPost to TeX
On 07/30/2010 08:20 AM, Oliver Buerschaper wrote:
No answer :-( Does that mean it's impossible with current technology?
Well, you could create a temporary file from withing the metapost
graphic, then read that file back on the TeX side, and then shift
the image vertically based on the info from that.
Complicated and a bit ugly, but doable. A nicer solution is to
adjust the bounging box of the image itself so that it does the
right thing. This seems to do the trick (but I recall there is
a way to pass a TeX variable to the figure; and that would be much
cleaner; but I don't remember how offhand).
\startuseMPgraphic{diagram2}
u := StrutHeight;
draw origin--(2u,0)--(u,sqrt(3)*u)--cycle;
currentpicture := currentpicture shifted (0,-(sqrt(3)*u/3));
setbounds currentpicture to (origin--(2u,0)--(u,sqrt(3)*u)--cycle);
\stopuseMPgraphic
\starttext
\startformula
A\raise\Umathaxis\displaystyle\hbox{\useMPgraphic{diagram2}}
=B
\stopformula
\stoptext
___
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
___
Re: [NTG-context] Passing info from MetaPost to TeX
is it possible to pass data from MetaPost back to TeX? This would be similar
in spirit to, say, the MetaPost variable BodyFontSize that contains data
from the TeX surrounding. Just the other way round.
maybe future mlib versions will provide something like that (writing
something from mp to a lua table); currently you have to use a file or
interpret the log (use show to print out values).
OK. What I have in mind is to vertically align a diagram with the math axis...
something like:
---
\startuseMPgraphic{diagram}
u := StrutHeight;
draw origin--(2u,0)--(u,sqrt(3)*u)--cycle;
% MathAxis at y-coordinate sqrt(3)*u/3
\stopuseMPgraphic
\starttext
\startformula
A\useMPgraphic{diagram}
=B
\stopformula
\stoptext
---
It would be great if the comment could be turned into a processing instruction
for ConTeXt such that the triangle's center of mass ends up on the math axis of
the formula.
What's the best way to achieve this?
Many thanks,
Oliver
___
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
___
Re: [NTG-context] Passing info from MetaPost to TeX
On 20-7-2010 2:00, Oliver Buerschaper wrote: Dear all, is it possible to pass data from MetaPost back to TeX? This would be similar in spirit to, say, the MetaPost variable BodyFontSize that contains data from the TeX surrounding. Just the other way round. maybe future mlib versions will provide something like that (writing something from mp to a lua table); currently you have to use a file or interpret the log (use show to print out values). Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ 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 ___
[NTG-context] Passing info from MetaPost to TeX
Dear all, is it possible to pass data from MetaPost back to TeX? This would be similar in spirit to, say, the MetaPost variable BodyFontSize that contains data from the TeX surrounding. Just the other way round. Best, Oliver Buerschaper ___ 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 ___
