In message <3ccbc0a8@news.povray.org>, Vic <let### [at] fwhu> writes
>Hi Alex!
>
<snip>
>
>There would be a camera modifier in PovRay supporting stereo images, like:
>
>camera {
>    ...
>    eye_distance 0.06
>    ...
>}
>
I was rather expecting something along the lines of the following to 
work:

#declare offset=1   // +1 for left eye, -1 for right, (0 for cyclops!)
camera {
   right <4,0,0>
   up <0,3,0>
   direction <offset,0,4>
   location <-5*offset,0,-20>
   look_at <0,0,0>
   }

but all that happens is the 'right' vector gets rotated to be 
perpendicular to the direction vector, causing the keystone distortion 
mentioned elsewhere in this thread.

>This should generate two images for each frame: a left eye view and a right
>eye view, such as:
>
>Stereo.pov =>
>Stereo01L.bmp
>Stereo01R.bmp
>Stereo02L.bmp
>Stereo02R.bmp
>...
>
>This could simplify stereo animation, because on the one hand it's not
>needed to calculate a new clock variable according to frame_number, on the
>other hand left and right images can be separated and processed easily.
>
>A command line/configuration paramter can also be useful to support stereo
>view of existing scenes.
>
I'd just create a .pov file to render the left eye as stereoL.pov, then 
just modify it for the right eye and save as stereoR.pov. But I'm just 
lazy....

-- 
Alex

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