modifying draw-method

["Klaus Häming" <khaeming@xxxxxx>]

Hi,

I have to synchronize two Instances of Performer running on two Computers.
I want these two Instances to draw a frame nearly at the same time.

My Idea to solve this problem, is to use a DRAW callback function such as
this one:

void DrawFunc(pfChannel *chan, void *data) {

        thisComputerIsReadyToDraw();    //to tell the other
                                        //Computer I'm ready

        while(otherComputerIsNotAtThisPoint()){
                //wait wait wait
        }

        pfDraw();

}

Is this a appropriate method?

Or is it possible to modify the pfDraw() in a way, that the synchronisation 
takes effect shortly before swapping the buffers? For this purpose I would have 
to know, what pfDraw() does in detail.

tia,
Klaus

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