I want to compute FFT using opengl and shaders.
I have seen that some people have done this using the fragment shader like this one GPU GEMS 2

But I think of using the Transform FeedBack Buffer. However, it is really difficult to find a simple example of it.
I already have the OpenGl superbible book in which this method is explaned but the example is highly difficult (flocking ).

So I wonder if using the Transform feedback is a good idea and if so do you know some basic tutorials of how to use it?

Thank you.