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 ___________________________________________________________________________________
