Path: chuka.playstation.co.uk!news
From: richard.cutting@virgin.net (Richard Cutting)
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Problem with positioning
Date: Wed, 20 May 1998 22:58:12 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 35
Message-ID: <35635f20.1525506@news.playstation.co.uk>
References: <memo.19980519234732.50219A@jmhannan.compulink.co.uk> <memo.19980520190139.9479A@jmhannan.compulink.co.uk>
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On 20 May 1998 18:08:54 GMT, jmhannan@cix.co.uk (Jeff Hannan) wrote:

>I have since waded through the entries in this newsgroup
>and I have become enlightened about many things.
>
>However, I don't recall any discussion of the axes - I
>know that the PSX is -Z-Y, but the direction of the X
>axis is important and it seems to me that the positive X
>direction is to the left
>	     -Y  -Z
>	      | /
>	+X ___|/___ -X
>	      |
>	     /|
>	+Z  / +Y
>
>Am I right?  Its yet another thing to be wary of.	
>
>Jeff Hannan
>
>P.S.  This is great, a thread all to myself.

Does anyone know why they went this route ? The usual scheme of things
( and the one used in all the graphics textbooks that I've seen ) is;

                  | +y
                  |
       -x  ------+----- +x
                  |
                  | -y

This is really annoying me as it means if I want to use any algorithms
in the books I have to bugger about and actually think instead of
being able to copy them straight......