Path: utzoo!attcan!uunet!husc6!uwvax!oddjob!ncar!ames!pasteur!ucbvax!decwrl!hplabs!hp-pcd!hpcvlx!mark
From: mark@hpcvlx.HP.COM (Mark Rowe)
Newsgroups: comp.lang.postscript
Subject: Re: Will scale take negative args (i.e. mirror flip)?
Message-ID: <510007@hpcvlx.HP.COM>
Date: 23 May 88 17:17:06 GMT
References: <552@aplcomm.UUCP>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 7

A -1 -1 scale would in effect flip the image about the the x axis and then
flip it about the y axis.  This would result in the quadrant I portion of
the image winding up in quadrant III but the double flip would leave the
image uninverted.  It is in effect a 180 degree rotation about the origin.

Mark Rowe
mark%hpcvlx@hplabs.HP.COM