CaloSimInfo.cc

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#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/EcalDetId/interface/EcalSubdetector.h"
#include "DataFormats/HcalDetId/interface/HcalSubdetector.h"
#include "Calibration/IsolatedParticles/interface/CaloConstants.h"
#include "Calibration/IsolatedParticles/interface/CaloSimInfo.h"
#include "Geometry/HcalTowerAlgo/interface/HcalGeometry.h"

#include "CLHEP/Units/PhysicalConstants.h"
#include "CLHEP/Units/SystemOfUnits.h"

#include<iostream>

//#define EDM_ML_DEBUG

namespace spr{

  double timeOfFlight(DetId id, const CaloGeometry* geo, bool debug) {

    GlobalPoint point = (id.det() == DetId::Hcal) ? 
      ((HcalGeometry*)(geo->getSubdetectorGeometry(id)))->getPosition(id) : 
      geo->getPosition(id);
    double R   = point.mag();
    double tmp = R/CLHEP::c_light/CLHEP::ns;
#ifdef EDM_ML_DEBUG
    if (debug) {
      DetId::Detector det = id.det();
      int subdet   = id.subdetId();
      double eta   = point.eta();
      double theta = 2.0*atan(exp(-std::abs(eta)));
      double dist  = 0;
      if (det == DetId::Ecal) {
    if (subdet == static_cast<int>(EcalBarrel)) {
      const double rEB = spr::rFrontEB*CLHEP::cm;
      dist = rEB/sin(theta);
    } else if (subdet == static_cast<int>(EcalEndcap)) {
      const double zEE = spr::zFrontEE*CLHEP::cm;
      dist = zEE/cos(theta);
    } else {
      const double zES = spr::zFrontES*CLHEP::cm;
      dist = zES/cos(theta);
    }
      } else if (det == DetId::Hcal) {
    if (subdet == static_cast<int>(HcalBarrel)) {
      const double rHB = spr::rFrontHB*CLHEP::cm;
      dist = rHB/sin(theta);
    } else if (subdet == static_cast<int>(HcalEndcap)) {
      const double zHE = spr::zFrontHE*CLHEP::cm;
      dist = zHE/cos(theta);
    } else if (subdet == static_cast<int>(HcalOuter)) {
      const double rHO = spr::rFrontHO*CLHEP::cm;
      dist = rHO/sin(theta);
    } else {
      const double zHF = spr::zFrontHF*CLHEP::cm;
      dist = zHF/cos(theta);
    }
      }
      double tmp1 = dist/CLHEP::c_light/CLHEP::ns;

      std::cout << "Detector " << det << "/" << subdet << " Eta/Theta " << eta 
        << "/" << theta/CLHEP::deg << " Dist " << dist/CLHEP::cm 
        << " R " << R << " TOF " << tmp << ":" << tmp1 << std::endl;
    }
#endif
    return tmp;
  }

}