Hi all, 

I want to set up a nice stereoscopic camera for anaglyphs, cross-eyed 
view and parallel view images. [Results will be made available publically 
when I succeed...]

I know, there is StereoPOV but I need to look more precisely at the issue: 
IIRC, StereoPOV uses a non-perpendicular camera which results when 
simply doing: 




(stereo_win_distance is the distance where the left and right rays 
cross each other and hence the plane which seems to be at the depth of 
the projection screen plane when viewed stereoscopically.) 

I do not understand why it is correct to use such a non-perpendicular 
camera. 

According to my understanding, the camera actually is generally NOT 
perpendicular but the angle between right and direction (=delta) depends 
not only on the ratio of eye_distance to stereo_win_distance but also on 
the actual eye ray crossing distance when viewing the image. 
This means that 
(a) cross-eyed view and parallel view require different delta-angles. 
(b) the above description (*) is incorrect; e.g. for anaglyphs one would 




I hope anyone here has enough clue to point out exactly what is going on. 

Regards,
Wolfgang

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