source: git/examples/ExternalFastJetBasic.cpp@ a8782e8

/*
 *  Delphes: a framework for fast simulation of a generic collider experiment
 *  Copyright (C) 2012-2014  Universite catholique de Louvain (UCL), Belgium
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/*

First, you need to set DELPHES_DIR, FASTJET_DIR and ROOT_DIR:

DELPHES_DIR=<path to Delphes installation>
FASTJET_DIR=<path to FastJet installation>
ROOT_DIR=<path to ROOT installation>

Then run the following commands to build ExternalFastJetBasic:

DELPHES_LIB="-L$DELPHES_DIR -lDelphesNoFastJet"

FASTJET_INC=`$FASTJET_DIR/bin/fastjet-config --cxxflags`
FASTJET_LIB=`$FASTJET_DIR/bin/fastjet-config --libs`

ROOT_INC=`$ROOT_DIR/bin/root-config --incdir`
ROOT_LIB=`$ROOT_DIR/bin/root-config --libs`

CXXFLAGS="$FASTJET_INC -I$ROOT_INC -I$DELPHES_DIR -I$DELPHES_DIR/external"
LDFLAGS="$FASTJET_LIB $ROOT_LIB $DELPHES_LIB"

g++ $CXXFLAGS $LDFLAGS ExternalFastJetBasic.cpp -o ExternalFastJetBasic

*/

#include <stdexcept>
#include <iostream>
#include <sstream>

#include <stdio.h>

#include "TROOT.h"
#include "TApplication.h"

#include "TFile.h"
#include "TObjArray.h"
#include "TDatabasePDG.h"
#include "TParticlePDG.h"
#include "TLorentzVector.h"

#include "modules/Delphes.h"
#include "classes/DelphesClasses.h"
#include "classes/DelphesFactory.h"

#include "ExRootAnalysis/ExRootTreeWriter.h"
#include "ExRootAnalysis/ExRootTreeBranch.h"
#include "ExRootAnalysis/ExRootProgressBar.h"

#include "fastjet/PseudoJet.hh"
#include "fastjet/JetDefinition.hh"
#include "fastjet/ClusterSequence.hh"

using namespace std;
using namespace fastjet;

//---------------------------------------------------------------------------

const int NEVENTS = 2;
const int NPARTICLES = 4;

float EVENTS[NEVENTS][NPARTICLES][11] =
{
  {
    {-211, 1, -2.91e-01,  1.99e-01, -1.30e+00, 1.35e+00, 1.3957e-01, 0.0, 0.0, 0.0, 0.0},
    { 211, 1, -2.62e-02,  1.90e-01,  1.42e+00, 1.44e+00, 1.3957e-01, 0.0, 0.0, 0.0, 0.0},
    {-211, 1, -3.08e-02, -2.30e-01,  5.13e+00, 5.14e+00, 1.3957e-01, 0.0, 0.0, 0.0, 0.0},
    { 211, 1,  1.21e-01, -3.52e-01,  2.12e+01, 2.12e+01, 1.3957e-01, 0.0, 0.0, 0.0, 0.0}
  },
  {
    {22, 1, -7.80e-02, -9.70e-02, 2.03e+01, 2.03e+01, 0.0, 0.0, 0.0, 0.0, 0.0},
    {22, 1, -1.16e-02, -2.08e-02, 4.89e-01, 4.90e-01, 0.0, 0.0, 0.0, 0.0, 0.0},
    {22, 1,  5.64e-02, -1.34e-02, 5.81e+00, 5.82e+00, 0.0, 0.0, 0.0, 0.0, 0.0},
    {22, 1,  2.35e-01, -1.04e-01, 9.12e+00, 9.12e+00, 0.0, 0.0, 0.0, 0.0, 0.0}
  }
};

//---------------------------------------------------------------------------

void ConvertInput(Int_t event, DelphesFactory *factory, TObjArray *allParticleOutputArray, TObjArray *stableParticleOutputArray, TObjArray *partonOutputArray);

int main(int argc, char *argv[])
{
  // Declaration of variables
  ExRootConfReader *confReader = 0;
  Delphes *modularDelphes = 0;
  DelphesFactory *factory = 0;
  TObjArray *allParticleOutputArray = 0;
  TObjArray *stableParticleOutputArray = 0;
  TObjArray *partonOutputArray = 0;

  Int_t event;

  TObjArray *inputArray = 0;
  TIterator *inputIterator = 0;
  Candidate *candidate = 0;
  TLorentzVector momentum;

  JetDefinition *definition = 0;
  vector<PseudoJet> inputList, outputList;
  PseudoJet jet;

  gROOT->SetBatch();

  int appargc = 1;
  char appName[] = "ExternalFastJetBasic";
  char *appargv[] = {appName};
  TApplication app(appName, &appargc, appargv);

  if(argc != 2)
  {
    cout << " Usage: " << appName << " config_file" << endl;
    cout << " config_file - configuration file in Tcl format." << endl;
    return 1;
  }

  try
  {
    // Initialization
    confReader = new ExRootConfReader;
    confReader->ReadFile(argv[1]);

    modularDelphes = new Delphes("Delphes");
    modularDelphes->SetConfReader(confReader);

    factory = modularDelphes->GetFactory();

    allParticleOutputArray = modularDelphes->ExportArray("allParticles");
    stableParticleOutputArray = modularDelphes->ExportArray("stableParticles");
    partonOutputArray = modularDelphes->ExportArray("partons");

    modularDelphes->InitTask();

    ClusterSequence::print_banner();
    definition = new JetDefinition(antikt_algorithm, 0.5);

    inputArray = modularDelphes->ImportArray("Calorimeter/towers");
    inputIterator = inputArray->MakeIterator();

    // Event loop
    for(event = 0; event < NEVENTS; ++event)
    {
      modularDelphes->Clear();
      ConvertInput(event, factory, allParticleOutputArray, stableParticleOutputArray, partonOutputArray);
      modularDelphes->ProcessTask();

      inputList.clear();
      inputIterator->Reset();
      while((candidate = static_cast<Candidate*>(inputIterator->Next())))
      {
        momentum = candidate->Momentum;
        jet = PseudoJet(momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E());
        inputList.push_back(jet);
      }
      ClusterSequence sequence(inputList, *definition);
      outputList.clear();
      outputList = sorted_by_pt(sequence.inclusive_jets(0.0));

      // tell the user what was done
      //  - the description of the algorithm used
      //  - show the inclusive jets as
      //      {index, rapidity, phi, pt}
      //----------------------------------------------------------
      cout << "Ran " << definition->description() << endl;

      // label the columns
      printf("%5s %15s %15s %15s\n","jet #", "rapidity", "phi", "pt");

      // print out the details for each jet
      for (unsigned int i = 0; i < outputList.size(); i++) {
        printf("%5u %15.8f %15.8f %15.8f\n",
               i, outputList[i].rap(), outputList[i].phi(),
               outputList[i].perp());
      }
    }

    // Finalization
    modularDelphes->FinishTask();
    delete modularDelphes;
    delete confReader;
    return 0;
  }
  catch(runtime_error &e)
  {
    cerr << "** ERROR: " << e.what() << endl;
    return 1;
  }
}

void ConvertInput(Int_t event, DelphesFactory *factory, TObjArray *allParticleOutputArray, TObjArray *stableParticleOutputArray, TObjArray *partonOutputArray)
{
  Int_t particle;

  Candidate *candidate;
  TDatabasePDG *pdg;
  TParticlePDG *pdgParticle;
  Int_t pdgCode;

  Int_t pid, status;
  Double_t px, py, pz, e, mass;
  Double_t x, y, z, t;

  pdg = TDatabasePDG::Instance();

  for(particle = 0; particle < NPARTICLES; ++particle)
  {
    pid = EVENTS[event][particle][0];
    status = EVENTS[event][particle][1];
    px = EVENTS[event][particle][2];
    py = EVENTS[event][particle][3];
    pz = EVENTS[event][particle][4];
    e = EVENTS[event][particle][5];
    mass = EVENTS[event][particle][6];
    x = EVENTS[event][particle][7];
    y = EVENTS[event][particle][8];
    z = EVENTS[event][particle][9];
    t = EVENTS[event][particle][10];

    candidate = factory->NewCandidate();

    candidate->PID = pid;
    pdgCode = TMath::Abs(candidate->PID);

    candidate->Status = status;

    pdgParticle = pdg->GetParticle(pid);
    candidate->Charge = pdgParticle ? Int_t(pdgParticle->Charge()/3.0) : -999;
    candidate->Mass = mass;

    candidate->Momentum.SetPxPyPzE(px, py, pz, e);

    candidate->Position.SetXYZT(x, y, z, t);

    allParticleOutputArray->Add(candidate);

    if(!pdgParticle) return;

    if(status == 1)
    {
      stableParticleOutputArray->Add(candidate);
    }
    else if(pdgCode <= 5 || pdgCode == 21 || pdgCode == 15)
    {
      partonOutputArray->Add(candidate);
    }
  }
}