advanced/CaTS/readMscHits.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0025 //
0026 //---------------------------------------------------------------------
0027 //*            |\___/|                                                *
0028 //*            )     (                                                *
0029 //*           =\     /=                                               *
0030 //*             )===(                                                 *
0031 //*            /     \     CaTS: Calorimeter and Tracker Simulation   *
0032 //*            |     |     is a flexible and extend-able framework    *
0033 //*           /       \    for the simulation of various detector     *
0034 //*       \       /    systems                                    *
0035 //*            \__  _/     https://github.com/hanswenzel/CaTS         *
0036 //*          ( (                                                  *
0037 //*           ) )                                                 *
0038 //*              (_(                                                  *
0039 //* CaTS also serves as an example that demonstrates how to use       *
0040 //* opticks from within Geant4 for the creation and propagation of    *
0041 //* optical photons.                                                  *
0042 //* see https://bitbucket.org/simoncblyth/opticks.git).               *
0043 //* Ascii Art by Joan Stark: https://www.asciiworld.com/-Cats-2-.html *
0044 //---------------------------------------------------------------------
0045 //
0046 /// \file readMscHits.cc
0047 /// \brief example how to read the  CaTS::MscHits
0048 //
0049 // Root headers
0050 #include "TFile.h"
0051 #include "TSystem.h"
0052 #include "TTree.h"
0053 #include "TH1.h"
0054 #include <string>
0055 // project headers
0056 #include "Event.hh"
0057 #include "MscHit.hh"
0058 #include "G4ThreeVector.hh"
0059
0060 int main(int argc, char** argv)
0061 {
0062   // initialize ROOT
0063   TSystem ts;
0064   gSystem->Load("libCaTSClassesDict");
0065   if(argc < 4)
0066   {
0067     G4cout << "Program requires 3 arguments: name of input file, name of "
0068               "output file, Volume that sensitive detector is attached to"
0069            << G4endl;
0070     exit(1);
0071   }
0072   TFile* outfile = new TFile(argv[2], "RECREATE");
0073   TFile fo(argv[1]);
0074   Event* event = new Event();
0075   TTree* Tevt  = (TTree*) fo.Get("Events");
0076   Tevt->SetBranchAddress("event.", &event);
0077   TBranch* fevtbranch = Tevt->GetBranch("event.");
0078   Int_t nevent        = fevtbranch->GetEntries();
0079   outfile->cd();
0080   TH1F* theta                = new TH1F("angle", "angle", 100, 0.0, 0.15);
0081   std::string CollectionName = argv[3];
0082   CollectionName             = CollectionName + "_Msc_HC";
0083   for(Int_t i = 0; i < nevent; i++)
0084   {
0085     fevtbranch->GetEntry(i);
0086     auto* hcmap = event->GetHCMap();
0087     for(const auto& ele : *hcmap)
0088     {
0089       if(ele.first.compare(CollectionName) == 0)
0090       {
0091         auto hits    = ele.second;
0092         G4int NbHits = hits.size();
0093         for(G4int ii = 0; ii < NbHits; ii++)
0094         {
0095           MscHit* mscHit = dynamic_cast<MscHit*>(hits.at(ii));
0096           G4ThreeVector invec(0, 0, 1.);
0097           std::cout << std::setprecision(12) << mscHit->GetKinE() << " "
0098                     << std::setprecision(12) << mscHit->GetMomentum().getX()
0099                     << " " << std::setprecision(12)
0100                     << mscHit->GetMomentum().getY() << " "
0101                     << std::setprecision(12) << mscHit->GetMomentum().getZ()
0102                     << std::endl;
0103           theta->Fill(invec.angle(mscHit->GetMomentum()) * 57.3);
0104         }
0105       }
0106     }
0107   }
0108   outfile->Write();
0109 }