RE: [Visualpython-users] Changing the OpenGL projection - how?

[Press, S. <sha...@ai...>]

It isn't obvious, mainly because all the work is done in software (ie very
few OpenGL calls).
All the work is done in glrender.cpp The getprojection method sets the
frustum using the paremeters <-R,R,-T,T,nearplane,farplane>. For what I am
doing I call this method twice, returning a different frustum for the left
and right windows <-R,0,-T,T,nearplane,farplane>
<0,R,-T,T,nearplane,farplane>
I assume you are trying to work in a single window however.
For a stereo effect you simply:
getbufferLE,getprojection(LE),render,getbufferRE,getprojection(RE),render
On a non-stero card this of course will not work properly. VPython
continuously renders so what happened to me in practice was that the left
eye image would appear, the right eye image would appear and dissapear, wait
while VPython does other stuff, left eye image appears etc This caused a
strobing effect that made me ill.