From: Peter Rolf <indiego@gmx.net>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: random background picture in metafun
Date: Tue, 13 Mar 2012 17:33:16 +0100 [thread overview]
Message-ID: <4F5F76CC.1090800@gmx.net> (raw)
In-Reply-To: <4F5F5DA1.1050202@uni-bonn.de>
Am 13.03.2012 15:45, schrieb Thomas A. Schmitz:
> Hi all,
>
> scenario: for a presentation, I want the background to be a random
> picture, taken from a directory "backgroundpics." The pictures are
> numbered consecutively as 1.jpg through 22.jpg. For some complex
> reasons, it would be easier for me to include these pictures via metafun
> (I want to add other graphical elements on top). So my question is, how
> can I pick a random picture? Given the code
>
> StartPage ;
> draw externalfigure "backgoundpics/1" xscaled PaperWidth yscaled
> PaperHeight ;
> StopPage ;
>
> how can I obtain a random number and make metapost pick the
> corresponding picture? Sorry, difficult to make a minimal example here...
>
(slightly tested)
string mypath, rndfile;
mypath:= "backgroundpics/";
nofpics:= 22;
n:= round(uniformdeviate(nofpics-1)+1);
rndfile:= mypath & decimal n;
HTH, Peter
> Thomas
> ___________________________________________________________________________________
>
> 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
___________________________________________________________________________________
next prev parent reply other threads:[~2012-03-13 16:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-13 14:45 Thomas A. Schmitz
2012-03-13 15:58 ` Aditya Mahajan
2012-03-13 16:33 ` Peter Rolf [this message]
2012-03-13 16:56 ` Thomas A. Schmitz
2012-03-13 17:09 ` Thomas A. Schmitz
2012-03-13 18:00 ` Aditya Mahajan
2012-03-13 18:24 ` Peter Rolf
2012-03-15 9:18 ` Thomas A. Schmitz
2012-03-15 18:06 ` Hans Hagen
2012-03-15 18:23 ` Thomas A. Schmitz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F5F76CC.1090800@gmx.net \
--to=indiego@gmx.net \
--cc=ntg-context@ntg.nl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).