* How to properly pass TeX/Lua data to MetaPost/MetaFun?
@ 2020-08-09 15:39 Jairo A. del Rio
2020-08-09 17:46 ` Hans Hagen
0 siblings, 1 reply; 5+ messages in thread
From: Jairo A. del Rio @ 2020-08-09 15:39 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Hi, list! I'm doing the following to scale squares and other stuff in
MetaPost/MetaFun. Although the following kinda works (maybe I'm just lucky
with this), I want to know how to do a better piece from it. I'm concerned
with passing data from Lua and TeX to Metapost and better ways to do it in
ConTeXt. Thank you in advance.
\starttext
My text
\startMPinitializations
numeric myunit;
myunit := \the\dimexpr1em\relax;
\stopMPinitializations
\startluacode
userdata = userdata or {}
userdata.dummydata = { {1, 2}, {3, 4} }
context.startMPcode()
for j=1,#userdata.dummydata do
for i=1,#userdata.dummydata[1] do
context("draw unitsquare scaled myunit shifted ((%d,%d)*myunit);",
userdata.dummydata[i][j], userdata.dummydata[i][j])
end
end
context.stopMPcode()
\stopluacode
\stoptext
Jairo :)
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* Re: How to properly pass TeX/Lua data to MetaPost/MetaFun?
2020-08-09 15:39 How to properly pass TeX/Lua data to MetaPost/MetaFun? Jairo A. del Rio
@ 2020-08-09 17:46 ` Hans Hagen
2020-08-09 18:03 ` Jairo A. del Rio
0 siblings, 1 reply; 5+ messages in thread
From: Hans Hagen @ 2020-08-09 17:46 UTC (permalink / raw)
To: mailing list for ConTeXt users, Jairo A. del Rio
On 8/9/2020 5:39 PM, Jairo A. del Rio wrote:
> Hi, list! I'm doing the following to scale squares and other stuff in
> MetaPost/MetaFun. Although the following kinda works (maybe I'm just
> lucky with this), I want to know how to do a better piece from it. I'm
> concerned with passing data from Lua and TeX to Metapost and better ways
> to do it in ConTeXt. Thank you in advance.
>
> \starttext
> My text
>
> \startMPinitializations
> numeric myunit;
> myunit := \the\dimexpr1em\relax;
> \stopMPinitializations
> \startluacode
>
> userdata = userdata or {}
> userdata.dummydata = { {1, 2}, {3, 4} }
>
> context.startMPcode()
>
> for j=1,#userdata.dummydata do
> for i=1,#userdata.dummydata[1] do
> context("draw unitsquare scaled myunit shifted ((%d,%d)*myunit);",
> userdata.dummydata[i][j], userdata.dummydata[i][j])
> end
> end
>
> context.stopMPcode()
>
> \stopluacode
> \stoptext
Something:
\starttext
\startluacode
userdata = userdata or {}
userdata.dummydata = { {1, 2}, {3, 4} }
function MP.GetI()
mp.print(#userdata.dummydata)
end
function MP.GetJ(i)
mp.print(#userdata.dummydata[i])
end
function MP.GetIJ(i,j)
mp.pair(userdata.dummydata[i][j],userdata.dummydata[i][j])
end
\stopluacode
\startMPcode
numeric myunit ; myunit := EmWidth;
for i = 1 upto lua.MP.GetI() :
for j = 1 upto lua.MP.GetJ(i) :
draw unitsquare scaled myunit shifted (myunit *
(lua.MP.GetIJ(i,j)));
endfor ;
endfor ;
\stopMPcode
\stoptext
There are of course also other ways but this is more educational as start.
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | 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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to properly pass TeX/Lua data to MetaPost/MetaFun?
2020-08-09 17:46 ` Hans Hagen
@ 2020-08-09 18:03 ` Jairo A. del Rio
2020-08-09 18:05 ` Hans Hagen
0 siblings, 1 reply; 5+ messages in thread
From: Jairo A. del Rio @ 2020-08-09 18:03 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
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Oh, thank you a lot, Hans, that's a really cleaner way than mine. One more
question, is there something similar to EmWidth for \textwidth or
\linewidth? Better, a better way to access TeX dimensions? Thank you again.
Jairo :)
El dom., 9 de ago. de 2020 a la(s) 12:46, Hans Hagen (j.hagen@xs4all.nl)
escribió:
> On 8/9/2020 5:39 PM, Jairo A. del Rio wrote:
> > Hi, list! I'm doing the following to scale squares and other stuff in
> > MetaPost/MetaFun. Although the following kinda works (maybe I'm just
> > lucky with this), I want to know how to do a better piece from it. I'm
> > concerned with passing data from Lua and TeX to Metapost and better ways
> > to do it in ConTeXt. Thank you in advance.
> >
> > \starttext
> > My text
> >
> > \startMPinitializations
> > numeric myunit;
> > myunit := \the\dimexpr1em\relax;
> > \stopMPinitializations
> > \startluacode
> >
> > userdata = userdata or {}
> > userdata.dummydata = { {1, 2}, {3, 4} }
> >
> > context.startMPcode()
> >
> > for j=1,#userdata.dummydata do
> > for i=1,#userdata.dummydata[1] do
> > context("draw unitsquare scaled myunit shifted ((%d,%d)*myunit);",
> > userdata.dummydata[i][j], userdata.dummydata[i][j])
> > end
> > end
> >
> > context.stopMPcode()
> >
> > \stopluacode
> > \stoptext
> Something:
>
> \starttext
>
> \startluacode
>
> userdata = userdata or {}
> userdata.dummydata = { {1, 2}, {3, 4} }
>
> function MP.GetI()
> mp.print(#userdata.dummydata)
> end
> function MP.GetJ(i)
> mp.print(#userdata.dummydata[i])
> end
> function MP.GetIJ(i,j)
> mp.pair(userdata.dummydata[i][j],userdata.dummydata[i][j])
> end
>
> \stopluacode
>
> \startMPcode
> numeric myunit ; myunit := EmWidth;
> for i = 1 upto lua.MP.GetI() :
> for j = 1 upto lua.MP.GetJ(i) :
> draw unitsquare scaled myunit shifted (myunit *
> (lua.MP.GetIJ(i,j)));
> endfor ;
> endfor ;
> \stopMPcode
>
> \stoptext
>
> There are of course also other ways but this is more educational as start.
>
> Hans
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
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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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to properly pass TeX/Lua data to MetaPost/MetaFun?
2020-08-09 18:03 ` Jairo A. del Rio
@ 2020-08-09 18:05 ` Hans Hagen
2020-08-09 18:08 ` Jairo A. del Rio
0 siblings, 1 reply; 5+ messages in thread
From: Hans Hagen @ 2020-08-09 18:05 UTC (permalink / raw)
To: Jairo A. del Rio; +Cc: mailing list for ConTeXt users
On 8/9/2020 8:03 PM, Jairo A. del Rio wrote:
> Oh, thank you a lot, Hans, that's a really cleaner way than mine. One
> more question, is there something similar to EmWidth for \textwidth or
> \linewidth? Better, a better way to access TeX dimensions? Thank you again.
When you grep for EmWidth ...
LineWidth
TextWidth
and plenty more like that
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | 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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to properly pass TeX/Lua data to MetaPost/MetaFun?
2020-08-09 18:05 ` Hans Hagen
@ 2020-08-09 18:08 ` Jairo A. del Rio
0 siblings, 0 replies; 5+ messages in thread
From: Jairo A. del Rio @ 2020-08-09 18:08 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
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Nice, I'm reading results right now. Thank you a lot, Hans.
Jairo :)
El dom., 9 de ago. de 2020 a la(s) 13:05, Hans Hagen (j.hagen@xs4all.nl)
escribió:
> On 8/9/2020 8:03 PM, Jairo A. del Rio wrote:
> > Oh, thank you a lot, Hans, that's a really cleaner way than mine. One
> > more question, is there something similar to EmWidth for \textwidth or
> > \linewidth? Better, a better way to access TeX dimensions? Thank you
> again.
> When you grep for EmWidth ...
>
> LineWidth
> TextWidth
>
> and plenty more like that
>
> Hans
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
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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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
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2020-08-09 15:39 How to properly pass TeX/Lua data to MetaPost/MetaFun? Jairo A. del Rio
2020-08-09 17:46 ` Hans Hagen
2020-08-09 18:03 ` Jairo A. del Rio
2020-08-09 18:05 ` Hans Hagen
2020-08-09 18:08 ` Jairo A. del Rio
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