Rounding error?!?!

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#1892

From: Alastair Adamson
Date: Tue, 08 Sep 1992 14:50

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I wrote the following trivial program to test my disbelief.
It simply prints the difference between the "y" value used in
a "moveto" and the "y" value returned by "currentpoint".
I am amazed by the magnitude of the resulting value. Can this
simply be put down to rounding error? Does anyone have a better
explanation. The test was done on a LaserWriter II NTX.

%!
/y 700 def
/x 100 def
/Times-Roman findfont 20 scalefont setfont
x y moveto
currentpoint exch pop
y sub
(                  ) cvs show
showpage

Thanks in advance for any help you can give me,
	Alastair Adamson
	alastair@cetia.fr

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Message-ID: <1992Sep8.145018.27114@cetia.fr>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!corton!vogon!bugle!alastair

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!corton!vogon!bugle!alastair
From: alastair@bugle.cetia.fr (Alastair Adamson)
Newsgroups: comp.lang.postscript
Subject: Rounding error?!?!
Message-ID: <1992Sep8.145018.27114@cetia.fr>
Date: 8 Sep 92 14:50:18 GMT
Sender: news@cetia.fr (News Manager)
Reply-To: alastair@bugle.cetia.fr (Alastair Adamson)
Organization: Cetia
Lines: 20