Accumulation Buffers

[rhodes]

Hello,
  I'm working on a visualization project that needs to do successive renders into an accumulation buffer, and I'm trying to figure out how to do this in JOGL. It looks like the necessary GLUT functionality is not present in JOGL. Is there another way to do this? Perhaps something to do with pBuffers? I'd be very grateful if someone could point me in the right direction, perhaps even with a simple example.