| MCTrack [message #5410] |
Thu, 15 November 2007 12:47  |
Klaus Götzen
Messages: 293
Registered: June 2006
Location: GSI
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first-grade participant |
From: *ikf.physik.uni-frankfurt.de
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Hi!
I somehow stumbling always about the same problems... my question is, where and when the MCTrack array is created and filled, so that I can access that from a task.
What I'd like to do is to access the MCTrack array of a simulated event, without running a transport code. My simple idea would be to init an arbitrary event generator, which produces the tracks and somehow stores these primaries.
A code snippet form my macro looks like:
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CbmRunSim *fRun = new CbmRunSim();
fRun->SetOutputFile("fastsim.root");
CbmPrimaryGenerator* primGen = new CbmPrimaryGenerator();
fRun->SetGenerator(primGen);
CbmEvtGenGenerator* evtGen = new CbmEvtGenGenerator("output.evt");
primGen->AddGenerator(evtGen);
primGen->DoTracking(kFALSE);
CbmFastSim* fastSim = new CbmFastSim();
fRun->AddTask(fastSim);
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but in my task CbmFastSim MCTrack is not accessible, I get the message
-E- CbmRootManager Branch: MCTrack not found in Tree
-W- CbmFastSim::Init: No MCStack array!
Most likely this is no big deal to solve. Somebody has a hint for me?
Cheers,
Klaus
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