Anyone knows how maya computes filmback translation?

Date : Sun, 3 Dec 2006 05:22:18 +0100 (MET)
To : XSI(at)Softimage.COM
From : Philipp Oeser <philipp.oeser(at)liga01.de>
Subject : Anyone knows how maya computes filmback translation?
Hi everyone,
I need to convert a XSI camera to Maya and I just cant figure out how maya computes the translation on the filmback. (their docs say "The values are normalized with respect to viewing area").
An example:
I have a 0,9802 inch x 0,7352 inch filmback in XSI with an -0,0307 inch horizontal filmback translation/optical center shift (here it is all in inches)
The cam in Maya (same filmback of 0,9802 inch x 0,7352 inch) seems to match at a Filmback translate H with a value of about -0.065. (All other settings in Filmback are standard, no scaling, no filmoffset, no lenssqueeze) (and matching also seems to be dependent on overscan).
Sorry, it's late at night and I cant get it right...


Any ideas?
Thanx in advance
Philipp

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Philipp Oeser
Liga_01 Computerfilm GmbH
www.liga01.de

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