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From: garry@batcomputer.TN.CORNELL.EDU (Garry Wiegand)
Newsgroups: net.graphics
Subject: Re: Y positive up or down? / Left or right-handed?
Message-ID: <1338@batcomputer.TN.CORNELL.EDU>
Date: Thu, 30-Oct-86 09:29:37 EST
Article-I.D.: batcompu.1338
Posted: Thu Oct 30 09:29:37 1986
Date-Received: Fri, 31-Oct-86 20:07:35 EST
Reply-To: garry%cadif-oak@cu-arpa.cs.cornell.edu
Organization: Cornell Engineering && Flying Moose Graphics
Lines: 18

Yo: another vote for Y positive up!  For graphics, that's what seems
to be human/natural.

A related question: in 3-D, do people like left-handed coordinates,
right-handed, or programmer-choosable ?  

I was raised on left-handed, but just yesterday I had someone being 
very confused while twirling the camera around -- he was thinking 
right-handed! So, fine, let it be selectable - but then think of
a programmer who picks one way who calls a library routine which
was written using the other way. Muchos confusing. Better to make
everybody agree ?

I heard a rumor once that most solid geometry books are right-handed...

garry wiegand   (garry%cadif-oak@cu-arpa.cs.cornell.edu)

(The opinions expressed above are indeed those of my company.)