Is it possible to calculate the 8 vectors creating some kind of boundingbox of me scene when using gluLookAt()? I was hoping I could use these coordinates for perobject clipping... Maybe there is another way to do this ... help would be appreciated.

Sounds like you''re describing frustum culling... check out http://www.markmorley.com/opengl/frustumculling.html for info and a demo.

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