[ROOT] TPythia problems

From: Joseph Tuggle (jtuggle@fnal.gov)
Date: Fri Jul 26 2002 - 18:29:06 MEST 

Hi,

When I use the TPythia class to generate events, I seem to get 
uninitialized variables instead of actual values. Here is an example...

TPythia myPythia;
TParticle *myParticle;

// Assume I've completed all initialization

myPythia.GenerateEvent();
int numParticles = myPythia.GetNumberOfParticles();
for(int i = 0; i < numParticles; i++) {
  myParticle = myPythia.GetParticle(i);
  float px = myParticle->Px();
}

Now, if I look at px, py, pz, etc, they all seem to be uninitialized. 
Same for Vx, Vy, Vz, and so on. Is there something simple I'm missing?

Thanks,
Joe

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