Hi Antonio,
On Fri, 2005-11-25 at 23:13 +0100, antonio_lioy wrote:
> > What's the difference between the two pictures, i.e. what do you do
> to
> > get one or the other?
>
> The purpose of the two images is just to show that horizontal axis
> looks good, while the more the inclination of one axis with respect to
> the floor the more the distorsion. The second image shows the first
> one after a bit inclination with the navigator...
> As you can see the more the inclination, the more the distorsion..
> Can this mean something??
Not really, that's normal. Try to put your head in the center of the
Cave, and it should look ok (or at least much better).
Be aware that a head-tracked stereo projection is fundamentally
different from a non-headtracked one. In the head-tracked case the image
will be correct only for the position that the head is at, from every
other position you will see distortions like the ones you see. They are
not quite as severe when stuff is a little further away from the center
of the Cave, but they are always there. However, as long as people are
looking in the same general direction, they should get a reasonably
immersive experience.
Sideline: I would not use the Navigator in Trackball mode for something
like this, it is pretty difficult to use. Try Fly mode, that seems to
work a lot better.
> > All that depends on where the head is. Unless the head is exactly in
> the
> > origin, you will never see the coordinate axes projected straight
> onto
> > the walls.
> >
>
> Uhm, OK. By the way when you say "origin", you mean that of the
> tracking system, don't you?
Yes.
> We don't use the tracking system at the moment... (but we should use
> it soon). The User of the Decorator is set to Identity and doesn't
> change. We just use the navigator through navigation window to
> simulate movement of the camera. The navigator works on a global
> beacon, which is the father of the Decorator User node.
OK.
> Thanks... But i really need more help. What are the coordinate systems
> involved? The tracker's one, but what about OpenSG? where should I
> think that OpenSG Axis are placed? This is not very clear...
That is defined by the Camera's beacon. You can think of it as the Cave
being attached rigidly to the Camera, so when you move around the
beacon, the whole Cave follows, with the -Z wall being in 'front'.
Hope it helps
Dirk
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
