Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!hp4nl!ruuinf!piet
From: piet@ruuinf (Piet van Oostrum)
Newsgroups: comp.lang.postscript
Subject: Re: Postscript Bug
Message-ID: <1184@ruuinf.UUCP>
Date: 9 Mar 89 17:38:10 GMT
References: <4571@umd5.umd.edu> <577@adobe.UUCP> <4583@umd5.umd.edu> <617@adobe.UUCP>
Sender: piet@ruuinf.UUCP
Reply-To: piet@ruuinf (Piet van Oostrum)
Organization: Dept of Computer Science, University of Utrecht, Holland
Lines: 15
In-reply-to: greid@adobe.com (Glenn Reid)

In article <617@adobe.UUCP>, greid@adobe (Glenn Reid) writes:

	       I still believe that it is related to numeric round-off,
 `but perhaps the roundoff is happening in the interpreter rather than
 `being inherent in the source program.
 `
Maybe this helps:

	The errors disappear if an extra translate of .5 pixel is specified
in the program. It looks like the pixel painting software is not rounding
but truncating pixel coordinates.
-- 
Piet van Oostrum, Dept of Computer Science, University of Utrecht
Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands
Telephone: +31-30-531806. piet@cs.ruu.nl (mcvax!hp4nl!ruuinf!piet)