* runtime problem with metafun() code
@ 2014-01-24 12:35 Peter Rolf
2014-01-24 13:45 ` Hans Hagen
0 siblings, 1 reply; 7+ messages in thread
From: Peter Rolf @ 2014-01-24 12:35 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1: Type: text/plain, Size: 352 bytes --]
Hi,
I try to create a Metapost path in lua and it works so far for the
attached example. But a call of that function from another lua function
sadly fails (no path visible after call). The code seems to be executed
later (the output from 'show pid;' appears somewhere later in the log).
How can I ensure that the code is executed at runtime?
Peter
[-- Attachment #2: mplua.lua --]
[-- Type: text/x-lua, Size: 1157 bytes --]
thirddata = thirddata or { }
thirddata.drops = thirddata.drops or { }
local drops = thirddata.drops
local metafun = context.metafun
local format,todimen = string.format, string.todimen
local floor = math.floor
-- http://lua-users.org/wiki/SimpleRound
local function round(num, idp)
local mult = 10^(idp or 0)
return floor(num * mult + 0.5) / mult
end
function drops.numberofpixels(n,idp)
local dimenfactor = 1/tex.pdfpxdimen
return round(todimen(n)*dimenfactor,idp)
end
local numberofpixels = drops.numberofpixels
function drops.generate_default_path(id,width,height,radius)
local w,h,r
w = numberofpixels(width); h = numberofpixels(height); r = numberofpixels(radius)
metafun.start()
metafun("save p,pid; path p; string pid;")
-- metafun("id := \"drops:boxshadow_w%sh%sr%s\";",w,h,r)
metafun("pid := \"%s\";",id)
--metafun("show pid;") -- ok
metafun("p:= unitsquare xyscaled(%s,%s) smoothed %s;",w,h,r)
metafun("passvariable(pid,p);")
metafun("setbounds currentpicture to boundingbox(p);") -- 'activator'; void graphics are ignored
metafun.stop()
end
[-- Attachment #3: mplua.mkiv --]
[-- Type: text/plain, Size: 235 bytes --]
\ctxloadluafile{mplua}{}
\starttext
\ctxlua{metapost.showlog = true}
\ctxlua{thirddata.drops.generate_default_path("drops:boxshadow-w199h100r10","200pt","100pt","10pt")}
\ctxlua{inspect(metapost.variables)}
\stoptext
[-- Attachment #4: Type: text/plain, Size: 485 bytes --]
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: runtime problem with metafun() code 2014-01-24 12:35 runtime problem with metafun() code Peter Rolf @ 2014-01-24 13:45 ` Hans Hagen 2014-01-24 18:41 ` Peter Rolf 0 siblings, 1 reply; 7+ messages in thread From: Hans Hagen @ 2014-01-24 13:45 UTC (permalink / raw) To: mailing list for ConTeXt users On 1/24/2014 1:35 PM, Peter Rolf wrote: > Hi, > > I try to create a Metapost path in lua and it works so far for the > attached example. But a call of that function from another lua function > sadly fails (no path visible after call). The code seems to be executed > later (the output from 'show pid;' appears somewhere later in the log). > > How can I ensure that the code is executed at runtime? I don't understand the issue but isn't there a metafun("draw p;") missing then? ----------------------------------------------------------------- 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: runtime problem with metafun() code 2014-01-24 13:45 ` Hans Hagen @ 2014-01-24 18:41 ` Peter Rolf 2014-01-25 0:07 ` Hans Hagen 0 siblings, 1 reply; 7+ messages in thread From: Peter Rolf @ 2014-01-24 18:41 UTC (permalink / raw) To: mailing list for ConTeXt users Am 24.01.2014 14:45, schrieb Hans Hagen: > On 1/24/2014 1:35 PM, Peter Rolf wrote: >> Hi, >> >> I try to create a Metapost path in lua and it works so far for the >> attached example. But a call of that function from another lua function >> sadly fails (no path visible after call). The code seems to be executed >> later (the output from 'show pid;' appears somewhere later in the log). >> >> How can I ensure that the code is executed at runtime? > > I don't understand the issue but isn't there a > > metafun("draw p;") > > missing then? > Setting the bounding box has the same effect, as drawing something. Both methods avoid that the emtpy graphic is ignored by ConTeXt. Anyhow, the MP path is not available in metapost.variables after the function call. If there is no other way I have to call the function from the TeX side (like in the attached example). Will look into that tomorrow. Peter > ----------------------------------------------------------------- > 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 > ___________________________________________________________________________________ > > ___________________________________________________________________________________ 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: runtime problem with metafun() code 2014-01-24 18:41 ` Peter Rolf @ 2014-01-25 0:07 ` Hans Hagen 2014-01-25 12:58 ` Peter Rolf 0 siblings, 1 reply; 7+ messages in thread From: Hans Hagen @ 2014-01-25 0:07 UTC (permalink / raw) To: mailing list for ConTeXt users On 1/24/2014 7:41 PM, Peter Rolf wrote: > Am 24.01.2014 14:45, schrieb Hans Hagen: >> On 1/24/2014 1:35 PM, Peter Rolf wrote: >>> Hi, >>> >>> I try to create a Metapost path in lua and it works so far for the >>> attached example. But a call of that function from another lua function >>> sadly fails (no path visible after call). The code seems to be executed >>> later (the output from 'show pid;' appears somewhere later in the log). >>> >>> How can I ensure that the code is executed at runtime? >> >> I don't understand the issue but isn't there a >> >> metafun("draw p;") >> >> missing then? >> > Setting the bounding box has the same effect, as drawing something. > Both methods avoid that the emtpy graphic is ignored by ConTeXt. > > Anyhow, the MP path is not available in metapost.variables after the > function call. If there is no other way I have to call the function from > the TeX side (like in the attached example). Will look into that tomorrow. %D We also provide an outputless run: \unexpanded\def\startMPcalculation ----------------------------------------------------------------- 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: runtime problem with metafun() code 2014-01-25 0:07 ` Hans Hagen @ 2014-01-25 12:58 ` Peter Rolf 2014-01-27 12:12 ` Hans Hagen 0 siblings, 1 reply; 7+ messages in thread From: Peter Rolf @ 2014-01-25 12:58 UTC (permalink / raw) To: mailing list for ConTeXt users [-- Attachment #1: Type: text/plain, Size: 1808 bytes --] Am 25.01.2014 01:07, schrieb Hans Hagen: > On 1/24/2014 7:41 PM, Peter Rolf wrote: >> Am 24.01.2014 14:45, schrieb Hans Hagen: >>> On 1/24/2014 1:35 PM, Peter Rolf wrote: >>>> Hi, >>>> >>>> I try to create a Metapost path in lua and it works so far for the >>>> attached example. But a call of that function from another lua function >>>> sadly fails (no path visible after call). The code seems to be executed >>>> later (the output from 'show pid;' appears somewhere later in the log). >>>> >>>> How can I ensure that the code is executed at runtime? >>> >>> I don't understand the issue but isn't there a >>> >>> metafun("draw p;") >>> >>> missing then? >>> >> Setting the bounding box has the same effect, as drawing something. >> Both methods avoid that the emtpy graphic is ignored by ConTeXt. >> >> Anyhow, the MP path is not available in metapost.variables after the >> function call. If there is no other way I have to call the function from >> the TeX side (like in the attached example). Will look into that >> tomorrow. > > %D We also provide an outputless run: > > \unexpanded\def\startMPcalculation > I tried that command, but couldn't get it to work on the lua side. The first pure MP line after context.startMPcalculation() raises a lua error and a combination with metafun() is also not working. So how to use this in lua? Anyhow, the problem is the execution time of the MP graphic. I changed the attached example a bit, so that you can see it. The inspect() in drops.foo() gives an empty table, while the second inspect on the TeX side shows the path "drops:foo". I need the path right after the call (it needs to be adapted to IM afterwards; mainly scaling and shifting). Is there a way to "force" the execution of the graphic without switching back to the TeX side? Peter [-- Attachment #2: mplua.lua --] [-- Type: text/x-lua, Size: 1310 bytes --] thirddata = thirddata or { } thirddata.drops = thirddata.drops or { } local drops = thirddata.drops local metafun = context.metafun local format,todimen = string.format, string.todimen local floor = math.floor -- http://lua-users.org/wiki/SimpleRound local function round(num, idp) local mult = 10^(idp or 0) return floor(num * mult + 0.5) / mult end function drops.numberofpixels(n,idp) local dimenfactor = 1/tex.pdfpxdimen return round(todimen(n)*dimenfactor,idp) end local numberofpixels = drops.numberofpixels function drops.generate_default_path(id,width,height,radius) local w,h,r w = numberofpixels(width); h = numberofpixels(height); r = numberofpixels(radius) metafun.start() metafun("save p,pid; path p; string pid;") -- metafun("id := \"drops:boxshadow_w%sh%sr%s\";",w,h,r) metafun("pid := \"%s\";",id) --metafun("show pid;") -- ok metafun("p:= unitsquare xyscaled(%s,%s) smoothed %s;",w,h,r) metafun("passvariable(pid,p);") metafun("setbounds currentpicture to boundingbox(p);") -- 'activator'; void graphics are ignored metafun.stop() end function drops.foo(id,width,height,radius) drops.generate_default_path(id,width,height,radius) inspect(metapost.variables) -- empty here end [-- Attachment #3: mplua.mkiv --] [-- Type: text/plain, Size: 351 bytes --] \ctxloadluafile{mplua}{} \starttext \ctxlua{metapost.showlog = true} %\ctxlua{thirddata.drops.generate_default_path("drops:boxshadow-w199h100r10","200pt","100pt","10pt")} %\ctxlua{inspect(metapost.variables)} \ctxlua{thirddata.drops.foo("drops:foo","200pt","100pt","10pt")} \ctxlua{inspect(metapost.variables)} % ok here \stoptext [-- Attachment #4: Type: text/plain, Size: 485 bytes --] ___________________________________________________________________________________ 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: runtime problem with metafun() code 2014-01-25 12:58 ` Peter Rolf @ 2014-01-27 12:12 ` Hans Hagen 2014-01-27 13:17 ` Peter Rolf 0 siblings, 1 reply; 7+ messages in thread From: Hans Hagen @ 2014-01-27 12:12 UTC (permalink / raw) To: mailing list for ConTeXt users On 1/25/2014 1:58 PM, Peter Rolf wrote: > Am 25.01.2014 01:07, schrieb Hans Hagen: >> On 1/24/2014 7:41 PM, Peter Rolf wrote: >>> Am 24.01.2014 14:45, schrieb Hans Hagen: >>>> On 1/24/2014 1:35 PM, Peter Rolf wrote: >>>>> Hi, >>>>> >>>>> I try to create a Metapost path in lua and it works so far for the >>>>> attached example. But a call of that function from another lua function >>>>> sadly fails (no path visible after call). The code seems to be executed >>>>> later (the output from 'show pid;' appears somewhere later in the log). >>>>> >>>>> How can I ensure that the code is executed at runtime? >>>> >>>> I don't understand the issue but isn't there a >>>> >>>> metafun("draw p;") >>>> >>>> missing then? >>>> >>> Setting the bounding box has the same effect, as drawing something. >>> Both methods avoid that the emtpy graphic is ignored by ConTeXt. >>> >>> Anyhow, the MP path is not available in metapost.variables after the >>> function call. If there is no other way I have to call the function from >>> the TeX side (like in the attached example). Will look into that >>> tomorrow. >> >> %D We also provide an outputless run: >> >> \unexpanded\def\startMPcalculation >> > I tried that command, but couldn't get it to work on the lua side. > > The first pure MP line after context.startMPcalculation() raises a lua > error and a combination with metafun() is also not working. So how to > use this in lua? > > > Anyhow, the problem is the execution time of the MP graphic. I changed > the attached example a bit, so that you can see it. > The inspect() in drops.foo() gives an empty table, while the second > inspect on the TeX side shows the path "drops:foo". > > I need the path right after the call (it needs to be adapted to IM > afterwards; mainly scaling and shifting). Is there a way to "force" the > execution of the graphic without switching back to the TeX side? function drops.foo(id,width,height,radius) drops.generate_default_path(id,width,height,radius) context(function() inspect(metapost.variables) end) -- empty here end or function drops.bar() inspect(metapost.variables) end function drops.foo(id,width,height,radius) drops.generate_default_path(id,width,height,radius) context(drops.bar) -- empty here end ----------------------------------------------------------------- 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: runtime problem with metafun() code 2014-01-27 12:12 ` Hans Hagen @ 2014-01-27 13:17 ` Peter Rolf 0 siblings, 0 replies; 7+ messages in thread From: Peter Rolf @ 2014-01-27 13:17 UTC (permalink / raw) To: mailing list for ConTeXt users Am 27.01.2014 13:12, schrieb Hans Hagen: > On 1/25/2014 1:58 PM, Peter Rolf wrote: >> Am 25.01.2014 01:07, schrieb Hans Hagen: >>> On 1/24/2014 7:41 PM, Peter Rolf wrote: >>>> Am 24.01.2014 14:45, schrieb Hans Hagen: >>>>> On 1/24/2014 1:35 PM, Peter Rolf wrote: >>>>>> Hi, >>>>>> >>>>>> I try to create a Metapost path in lua and it works so far for the >>>>>> attached example. But a call of that function from another lua >>>>>> function >>>>>> sadly fails (no path visible after call). The code seems to be >>>>>> executed >>>>>> later (the output from 'show pid;' appears somewhere later in the >>>>>> log). >>>>>> >>>>>> How can I ensure that the code is executed at runtime? >>>>> >>>>> I don't understand the issue but isn't there a >>>>> >>>>> metafun("draw p;") >>>>> >>>>> missing then? >>>>> >>>> Setting the bounding box has the same effect, as drawing something. >>>> Both methods avoid that the emtpy graphic is ignored by ConTeXt. >>>> >>>> Anyhow, the MP path is not available in metapost.variables after the >>>> function call. If there is no other way I have to call the function >>>> from >>>> the TeX side (like in the attached example). Will look into that >>>> tomorrow. >>> >>> %D We also provide an outputless run: >>> >>> \unexpanded\def\startMPcalculation >>> >> I tried that command, but couldn't get it to work on the lua side. >> >> The first pure MP line after context.startMPcalculation() raises a lua >> error and a combination with metafun() is also not working. So how to >> use this in lua? >> >> >> Anyhow, the problem is the execution time of the MP graphic. I changed >> the attached example a bit, so that you can see it. >> The inspect() in drops.foo() gives an empty table, while the second >> inspect on the TeX side shows the path "drops:foo". >> >> I need the path right after the call (it needs to be adapted to IM >> afterwards; mainly scaling and shifting). Is there a way to "force" the >> execution of the graphic without switching back to the TeX side? > > > function drops.foo(id,width,height,radius) > drops.generate_default_path(id,width,height,radius) > context(function() inspect(metapost.variables) end) -- empty here > end > > or > > function drops.bar() > inspect(metapost.variables) > end > > function drops.foo(id,width,height,radius) > drops.generate_default_path(id,width,height,radius) > context(drops.bar) -- empty here > end > > Ah, that's how it works. I'm still a luatex noob... Many thanks, Hans!! Peter ___________________________________________________________________________________ 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 ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-01-27 13:17 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-01-24 12:35 runtime problem with metafun() code Peter Rolf 2014-01-24 13:45 ` Hans Hagen 2014-01-24 18:41 ` Peter Rolf 2014-01-25 0:07 ` Hans Hagen 2014-01-25 12:58 ` Peter Rolf 2014-01-27 12:12 ` Hans Hagen 2014-01-27 13:17 ` Peter Rolf
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