Hi, I've added comments inline.

On Jun 5, 2009, at 9:47 AM, Biagio Cosenza wrote:

1st)
Is there in Manta code (maybe in Core/Thread ?) something to easily implement this:

if(I'm the first thread arrived here){
  //  do something
}

instead of

if(context.proc == 0){
  //  do something
}

I don't think this construction occurs anywhere in the code, but it should be possible using the methods in Semaphore, e.g. if (semaphore.tryDown()) { // I'm the first. }. Of course the semaphore would need to be incremented from a safe place earlier in the render loop, perhaps in an animation callback.