BeginRaw() - Exclude objects outside camera view

Hi,

I'm exporting my 3D scene to PDF/DXF, but EVERYTHING in that scene is included in the output, including everything that is not visible to the camera. This makes sense I guess, but is there anyway of excluding shapes that are not visible to the camera view?

I could simply not draw certain shapes if I knew if something was in camera view or not I guess, so is there a way to test if a PVector is in view?

Thanks!