home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.graphics:14326 comp.windows.x.pex:710 comp.graphics.opengl:284
- Path: sparky!uunet!usna!dfr
- From: dfr@usna.navy.mil (PROF D. Rogers (EAS FAC))
- Newsgroups: comp.graphics,comp.windows.x.pex,comp.graphics.opengl
- Subject: Re: Row major or column major matrices?
- Message-ID: <2698@usna.NAVY.MIL>
- Date: 27 Jan 93 18:39:34 GMT
- References: <1993Jan22.124249.3817@eye.com> <1993Jan23.000930.26869@kpc.com> <phillips.728015799@swanee>
- Sender: news@usna.NAVY.MIL
- Followup-To: comp.graphics
- Organization: U. S. Naval Academy
- Lines: 22
-
- In article <phillips.728015799@swanee> phillips@swanee.ee.uwa.edu.au (Christopher James Phillips) writes:
- !In <1993Jan23.000930.26869@kpc.com! jbulf@balsa.Berkeley.EDU (Jeff Bulf) writes:
- !
- !!On a related note...
- !!I learned most of my 3d graphics in left-handed coordinates. When
- !!z increases into the screen, the perspective transformation falls
- !!out trivially from an extra 1 in the viewing matrix.
- !!(F&VD comes to mind as an example). Yet PEX insists on right-handed
- !!coordinates, and PEX is the nearest thing to an existing standard in
- !!the industrial world. (Arguably brain-dead, but there's no use in
- !!getting into that.) Anyway, more nearly universal consistency would be appreciated here too.
- !
- !Well I learned most of my _2d_ graphics with x increasing to the right, and
- !y increasing down, so z increasing into the screen gives me a RHS
- !immediately :)
-
- Well Chris that's because you guys are all upside down! :) :)
-
- On the other hand I sure enjoyed it when I lived `downunder'.
-
- Dave Rogers
-
-