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From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Rotating Bit Images.
Keywords: Bitmaps
Message-ID: <30893@ucbvax.BERKELEY.EDU>
Date: 25 Aug 89 04:06:48 GMT
References: <1495@unocss.UUCP> <3736@ncsuvx.ncsu.edu> <34285@apple.Apple.COM> <113@vsserv.scri.fsu.edu>
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Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
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As Eric Pepke said, there is a bitmap rotation article in an '85 issue of
MacTutor. To tie things back around to the root of this discussion, this
article demonstates the same "simple, efficient, elegant" algorithm that
is given in the SmallTalk book. The algorithm simply isn't any of the
things it claims to be.

The right way to rotate bitmaps by 90 degrees is given a recent MacTutor
in an article entitled "Editing Rotated Text" whcih covers running
TextEdit in an off-screen buffer, rotating the result,  and CopyBitsing to
the window, on each keystroke.  Nifty article.

--- David Phillip Oster            --"Unix Version 7 was an improvement not
Arpa: oster@dewey.soe.berkeley.edu --only over its predeccessors, but also its
Uucp: {uwvax,decvax}!ucbvax!oster%dewey.soe.berkeley.edu --successors."