On Mon, 12 Jun 2006, Hans Hagen wrote:
> Aditya Mahajan wrote:
>> Hi,
>>
>> Does there exist a startstop command (say startMPfigure) for managing
>> figures drawn using MP such that
>>
>> 1. I can use \startMPfigure{label} ...... \stopMPfigure and then use
>> \useexternalMPfigure{label} to include the figure.
>>
> grep for \startMPrun .. \stopMPrun
Thanks! This was almost what I needed.
>> 2. The figures are converted into pdf once. If the code inside
>> \startstop MPfigures changes, the pdf for each figure is recreated.
>>
>> Basically, I want MPfigures to be converted into pdf for faster
>> inclusion in the main document, the figure should be recompiled if
>> necessary and I should be able to include the figure using a label
>> (so that I can separate the figures from the main document).
>>
> you can use the figure database mechanism (davids arnold does that)
>
> or make individual files, say 'thatfile.tex'
>
> \starttext \startMPpage
> fill fullcircle scaled 10cm;
> \stopMPpage \stoptext
>
> and then in test.tex say:
>
> \def\MyMpgraphic[#1]%
> {\executesystemcommand{texmfstart --ifchanged=#1.tex texexec #1.tex}
> \externalfigure[#1.pdf]}
>
> \starttext
>
> \MyMpgraphic[thatfile]
>
> \MyMpgraphic[thatfile][width=3cm]
>
> \stoptext
>
> (you need a version of texmfstart that provided the -ifchanged)
I have a simple version using this idea that is working. See at the
end.
>> uniqueMPgraphic provides the first functionality, but the figure is
>> converted into pdf on runtime (thereby increasing the processing time
>> of the document).
>>
> expect this to be sped up later this year (neglectable)
>> I can use a separate document with each figure inside a \startMPpage
>> ... \stopMPpage, but (i) I need to remember figure numbers manually,
>> (ii) after making change in one figure, the whole file needs to be
>> recompiled.
>>
> so who not filenames like whateverprefix-somelabel
Did not think of that. Was too busy trying to figure out how to do
number to label mapping :)
>> Another possibility is to use one tex file for each figure, compile
>> them separately and then then use figure library to get a "label" for
>> each figure. But this becomes difficult to manage, as soon as I get
>> large number of files.
>>
>> Is their something basic that I am missing here? How do others manage
>> mpfigures?
>>
>> To Hans: is it possible to have a \startMPfigure command such that
>>
>> 1. \startMPfigure[label]
>> figure code
>> \stopMPfigure
>>
>> creates a \jobname-figure-\nofMPfigurefile file with
>>
>> current MP environment
>> current MP inclusion
>> figure code (from inside \startstop MPfigure)
>>
>> Convert this into \jobname-figure-\nofMPfigurefile.pdf only if
>> something changes (similar to what is done in m-r module).
>>
>>
> see prev example for a starter
>> 2. The resultant pdf can be included using \useMPfigure{label}.
>>
>> Would such a feature make sense?
>
> would be a different command
I have right now kept the command as MPfigure.
The following works, but I can not figure out
1. How to force texexec to give pdf output from an mp file. Do I need
to start another mptopdf process?
2. How to get textext to work?
3. I needed to set randomseed to false. Does this have any drawbacks?
supp-mps.tex says that this feature is optional. Does metapost have a
good random seed initializer now?
\def\startMPfigure#1#2\stopMPfigure
{\bgroup
\setMPrandomseedfalse
%Otherwise randomseed := number line always differ
% \forceMPTEXgraphictrue %Does not work
\def\executeMPOST##1%
{texmfstart --verbose --ifchanged=##1.mp bin:mpost
\ifcase\interactionmode\MPOSTbatchswitch\or\MPOSTnonstopswitch\fi
\space\ifuseMETAFUNformat \MPOSTformatswitch metafun \fi ##1}
\def\executeMPTEX##1% slower, due to nested texexec call
{texmfstart --verbose --ifchanged=##1.mp texexec
--batch \ifcase\interactionmode --logfile='mptex.log' \fi
--output=\MPOSTdriver\space
\ifuseMETAFUNformat --mpformat=metafun \fi --mptex --nomp
--once ##1}
\startMPrun{\jobname-#1}
beginfig(1)
#2
endfig;
\stopMPrun\egroup}
\def\useMPfigure{\dosingleempty\douseMPfigure}
\def\douseMPfigure[#1]%
{\externalfigure[\jobname-#1.1]}
\starttext
\startMPfigure{circle}
fill fullcircle scaled 10cm;
\stopMPfigure
\startMPfigure{axis}
drawarrow (0,0)--(1cm,0) ;
drawarrow (0,0)--(0,1cm) ;
label.llft(btex (0,0) etex,origin) ;
\stopMPfigure
\hbox to \hsize \bgroup
\hss \useMPfigure[circle][width=1cm] \hss \useMPfigure[axis] \hss
\egroup
\stoptext
Aditya
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