Am 2017-09-09 um 22:06 schrieb Aditya Mahajan <adit...@umich.edu>:
> On Sat, 9 Sep 2017, Henning Hraban Ramm wrote:
>
>> Ahoi,
>> I got some long images that I’d like to split over several pages.
>>
>> \def\clipfigure{\dodoubleempty\doClipFigure}
>> \def\doClipFigure[#1][#2]{
>> \dorecurse{#1}{%
>> \clip[
>> height=\textheight,
>> voffset=\dimexpr((\recurselevel -1) * \textheight)
>> ]{\externalfigure[#2][width=\textwidth]}\par
>> }
>> }
>>
>> \clipfigure[3][verylongimage]
>>
>> But "\dimexpr((\recurselevel -1) * \textheight)" for the vertical offset is
>> wrong.
>> How can I do this calculation?
>
> You are missing a comma at the end of the voffset line
Thank you, but that’s not the core problem.
I get "Illegal unit of measure (pt inserted)".
My current code actually looks like
% split in #1 page size parts
\def\clipfigure{\dodoubleempty\doClipFigure}
\def\doClipFigure[#1][#2]{
\ifsecondargument
\dorecurse{#1}{%
\tooltip{\clip[
height=\textheight,
voffset=\dimexpr((\recurselevel - 1)\textheight),]{%
\externalfigure[#2]}}{#2 (\recurselevel/#1)}\par}
\else
\normalfigure[#1]
\fi
}
Another approach:
\def\ausschnitt{\dodoubleempty\doAusschnitt}
\def\doAusschnitt#1#2{\clip[height=\textheight,voffset=#1]{\externalfigure[#2][width=\textwidth]}\par}
This also doesn’t work; there I’m trying to set the y coordinate for the start
like
\ausschnitt[15cm][verylongimage]
Here I get "Missing number, treated as zero".
I guess I need to employ the right combination of \the, expansion etc., but I
don’t know how. This stuff is still over my head.
> but why not use
> \clip[nx= .., ny=.., x=, y=...] instead.
> http://wiki.contextgarden.net/Using_Graphics#Image_Clipping
Because I don’t want to split the picture in even slices, but cut in places
where it makes sense. The page height is a simplification, until I get the
calculations working.
BTW example picture:
http://www.balderdashcomic.com/comic/ibonus
i.e. http://www.balderdashcomic.com/comics/1416175460-bonus1.png
Greetlings, Hraban
---
http://www.fiee.net
http://wiki.contextgarden.net
GPG Key ID 1C9B22FD
___________________________________________________________________________________
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
___________________________________________________________________________________
