   Gaussian Blur
  I want to put a gaussian blur effect over the camera to make things look out of focus.  If any one knows how to do this on jogl (opengl for java), that would be great, but if no one knows, then normal opengl would be fine.   
  The easiest way to do this would be to use Shaders.There are a number of algorithms around to do a blur, most have been turned into GLSL shaders so you should be able to find them on the internet.   