Path: chuka.playstation.co.uk!scea!peter_alau@playstation.sony.com
From: Darco <rquat@datasys.net>
Newsgroups: scea.yaroze.programming.3d_graphics,scee.yaroze.programming.3d_graphics
Subject: Re: Camera math
Date: Sat, 13 Feb 1999 10:41:33 -0500
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Ed Federmeyer wrote:
> 
> I have read a lot of books and online documentation describing all the 3D
> matrix math to transform object-space coordinates to world-space coordinates
> to screen-space coordinates, but they ALL ASSUME that the camera is at the
> origin facing down the "Z" axis.
> 

Ahhhh......!!!!!!

 So that's why my camera was turning all weird when I moved it!!!!!
Do'h! There's no way I can change the axies now, I'm too far along in
development. :( I guess camera object following in my game will be a
little bit more difficult to implement than I first thought.


> Can anyone point me to some documentation that describes what needs to be
> done to have the camera at an arbitrary location facing in an arbirtrary
> direction?
> 
> Luckily our Net Yaroze libs take care of this with the SetRView() function,
> where you specify the viewpoint and refpoint, but I'd really like to
> understand what goes on behind the scenes.
> 

I donno. My system in bloodshed uses the Z axis as straight up. This
unfortunately makes my camrea movements a little screwed - I have to
rotate it 90 degrees to compensate. 

'Darco