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And don't forget, this can be useful:
http://www.xsi-blog.com/?p=65
(awfully shameless plug)
Gene Crucean wrote:
Holy thread revival batman!
I'm still a little confused by this stuff (I know I know). So in
boujou, it wants the film back size (which I don't have, but I know it
was shot on a Sony HDW-5900H), and the focal length which is 3'2". I
tried searching on the web for the film back size of that camera but
no information for that camera even comes up at all. So I guess my
first real question is does anyone know the FB size of that camera?
The only information that we have on the camera is the lens (7m which
I'm assuming is a typo meant to be mm), the foc which is 3'2" and the
PSF which is 23.98. Well and some other random info like height, tilt,
Tstop, roll etc.
I ran a quick track on it without using the correct FB info and no
surprise it comes into xsi with a FOV of something like 12 (way off
visually). I'm a little confused with all this conversion stuff so any
input would be appreciated.
Thanks guys
On 6/15/05, *Robert Moodie* <robertm(at)hybride.com
<mailto:robertm(at)hybride.com>> wrote:
While we're on the subject - here's a little something:
Run this (vbs) script:
NewScene
SelectObj "Camera_Root", "BRANCH"
ToggleVisibility
DeleteObj "Camera_Interest"
SelectObj "Camera"
Rotate , 0, 0, 0, siAbsolute, siPivot, siObj, siX, , , , , , , , 0
GetPrim "Null"
GetPrim "Null"
Translate , 0, 0, -20, siAbsolute, siPivot, siObj, siZ, , , , , ,
, , , , 0
Now, hide the grid in the camera view and in any other view - NOT
THE CAMERA VIEW - select and rotate (pan) the camera.
Watch what happens to the nulls - there is no parallax.
Now run this:
SetValue "Camera.kine.local.pposz", 1.5
(What we are doing is offsetting the camera pivot to be 'behind'
the lens - to see the pivots turn them on in Visibility options)
Now select and pan the camera as you did before and watch the
magic of parallax.
This is no limitation of XSI - it happens in all 3D apps - but
basicaly the pivot point of 3D cameras is also the Nodal point.
And this never happens in real life.
For further explanation read this:
http://360texas.com/tips/nodalpts.htm
<http://360texas.com/tips/nodalpts.htm>
Hopefully this may be a little help to someone. If you know the
make and models of your 'real' cameras, tripods or dollies you can
set the pivot offset values to match exactly what was on set.
_rob
--
-gc
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