RE: offaxis camera

["kim aldis" <kim(at)aldis.org.uk>]

 

Shifting the optical centre won’t do what you want for stereoscopic work. Because there’s no change in parallax when the centre is offset. It’s difficult to really see what it is that you’ve described below but it also looks like it may be a shift. For stereoscopy you need to shift the actual camera/lookto horizontally, retaining parallelism to the original lookto line and render 2 images. Exactly as your two eyes do, shifted horizontally to each other.

 

.You want to be clever you might be able to do this with expressed overrides on your camera/lookto positions in a pair of passes. If not, there’s also a stereoscopic lens shader that you can use on passes too.

 

 

<rant>

There’s a number of terms that have been used for many years in photography to describe the things you can do with a camera lens and film plane.  ‘Off Axis

Camera’ is another one of those dumb terms picked out of the air by some half-wit looking for a hook he can pin his new toy on. Rising/falling/shift, swing/tilt applied to film back and lens are perfectly adequate and everyone knows or can find out exactly what’s meant with a quick Google or Wikipedia search.

God preserve us from morons trying to invent the wheel all over again and trying to call it a rotationing motionalisation  device because it’s makes them sound like they have a clue rattling around in their empty little heads.

</rant>

 

From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Thierry Baret
Sent: 06 August 2006 14:35
To: XSI(at)Softimage.COM
Subject: Re: offaxis camera

.a

Thank you, Kim, I was just looking at that and was wondering if that was it because the representation of the cone of the camera doesn't update even if of course,in the camera view you get an offset.I was expecting to see a camera cone not constrained in direction with the camera anymore.

 

 

It's just that somebody told me 3dmax had offaxis camera (for stereoscopy usage) and I was wondering if we had something that could do the trick too.

 

Thierry

 

----- Original Message -----

From: kim aldis

To: XSI(at)Softimage.COM

Sent: Sunday, August 06, 2006 12:34 PM

Subject: RE: offaxis camera

 

 

 

If you mean shifting the optical centre of the projection plane, Thierry, check out the projection plane tab in the camera properties. Look for optical centre shift.

 

 

From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Thierry Baret
Sent: 06 August 2006 11:19
To: XSI(at)Softimage.COM
Subject: offaxis camera

 

Hello all,

 

Does anybody know if we can create off axis camera in XSI?

 

Thierry