P3D Calculating on film deviation.

[phil@xxxxxxxxxxxxxxxxxxx (Phil Palmer)]

I'm working on a way to generate stereo title slides and would like to know
how to calculate the horizontal deviation of a point if you know its
notional position behind the windows.

My thoughts at the moment are as follows - 

if the window is at 7 ft then a point at the window has zero deviation.
At infinity I am assumimg a deviation of 1.5 mm (I know i'm mixing 
metric and imperial, I can't help it :->)

I don't believe the deviation is linear so my simplified idea is as follows -

Difference in depth       Deviation

7ft to 8 ft               0.1mm
8ft to 10 ft              0.1mm
10ft to 14ft              0.1mm 

and so on - double the distance means an extra 0.1mm in deviation - this puts
infinity at just over 16000 ft

I can't believe this is the correct way to do it and it doesn't help
me with objects forward of the window so if anyone knows the real 
calculation I would appreciate it.

Thanks
-- 
Phil Palmer
http://www.norma86.demon.co.uk


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