|Message: What are differences between methods to get momentum information||Not Logged In (login)|
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Dear Geant4 experts,
I was wondering if you could explain for me about the differences between the methods GetMomentum(), GetVertexMomentumDirection() and GetMomentumDirection(). I looked through some examples and have feeling that these methods do the same task, is it true?
In addition, in order to get information about secondaries at creation, in SteppingAction.cc what's kind of syntax do we have to use:
We use, for example to get momentum and position:
G4double x =(secondary)[lp]->GetPosition().x();
or we can use:
G4Track* theTrack = theStep->GetTrack();
G4ThreeVector momentum = theTrack->GetVertexMomentumDirection();
G4doulbe x = theTrack->GetPosition().x();
I would like to thank for your answer in advance!
Phan Viet Cuong