has anyone used them before?  i have a number of states, some of which need background calls and some of which need there to be no background calls, that i want to be able to blend between.  seems like the best way to do it is to render each to an auxiliary buffer (each with its required background) and then blend the buffers.

am i on the right track with the code below?

Code:

float blends = new float[4];

gl.glDrawBuffer(GL_AUX0);
//draw state 0
//set blend[0]

gl.glDrawBuffer(GL_AUX1);
//draw state 1
//set blend[1]

gl.glDrawBuffer(GL_AUX2);
//draw state 2
//set blend[2]

gl.glDrawBuffer(GL_AUX3);
//draw state 3
//set blend[3]

//reset draw buffer (or does processing do this automatically?)
gl.glDrawBuffer(GL_FRONT);
 

whether or not the above code is the right direction, i don't know where i go next to blend and draw the buffers.  dunno if i use glDrawPixels() or glClear(), or something else, nor what the parameters would be.

any ideas?