PFResolutionMap.cc

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#include "RecoParticleFlow/PFClusterTools/interface/PFResolutionMap.h"
#include <fstream>
#include <sstream>
#include <algorithm>
#include <functional>
#include <stdexcept>
#include <TFile.h>
#include <TMath.h>
#include <vector>
using namespace std;
#include "FWCore/MessageLogger/interface/MessageLogger.h"
 
const unsigned PFResolutionMap::lineSize_ = 10000;
 
PFResolutionMap::PFResolutionMap(const char* name,
                                 unsigned nbinseta,
                                 double mineta,
                                 double maxeta,
                                 unsigned nbinse,
                                 double mine,
                                 double maxe,
                                 double value)
    : TH2D(name, name, nbinseta, mineta, maxeta, nbinse, mine, maxe) {
  GetXaxis()->SetTitle("#eta");
  GetYaxis()->SetTitle("E");
 
  if (value > 0) {
    for (int ie = 1; ie <= GetNbinsY(); ie++) {
      for (int ieta = 1; ieta <= GetNbinsX(); ieta++) {
        SetBinContent(ieta, ie, value);
      }
    }
  }
  // cout<<"creating resolution map "<<endl;
  // Print("all");
}
 
PFResolutionMap::PFResolutionMap(const char* name, const char* mapfile) {
  SetTitle(name);
  GetXaxis()->SetTitle("#eta");
  GetYaxis()->SetTitle("E");
  if (!ReadMapFile(mapfile)) {
    string err = "PFResolutionMap::PFResolutionMap : cannot read file ";
    err += mapfile;
    throw invalid_argument(err);
  }
}
 
bool PFResolutionMap::WriteMapFile(const char* mapfile) {
  //  assert(fData.size() == fNbinsEta*fNbinsE);
 
  // open the file
 
  std::ofstream outf(mapfile);
  if (!outf.good()) {
    edm::LogWarning("PFResolutionMap::Write") << " : cannot open file " << mapfile;
    return false;
  }
 
  outf << (*this) << endl;
  if (!outf.good()) {
    edm::LogError("PFResolutionMap::Write") << " : corrupted file " << mapfile;
    return false;
  } else {
    mapFile_ = mapfile;
    return true;
  }
}
 
bool PFResolutionMap::ReadMapFile(const char* mapfile) {
  // open the file
 
  std::ifstream inf(mapfile);
  if (!inf.good()) {
    // cout<<"PFResolutionMap::Read : cannot open file "<<mapfile<<endl;
    return false;
  }
 
  // first data describes the map
 
  int nbinseta = 0;
  double mineta = 0;
  double maxeta = 0;
 
  int nbinse = 0;
  double mine = 0;
  double maxe = 0;
 
  inf >> nbinseta;
  inf >> mineta;
  inf >> maxeta;
 
  inf >> nbinse;
  inf >> mine;
  inf >> maxe;
 
  SetBins(nbinseta, mineta, maxeta, nbinse, mine, maxe);
 
  char s[lineSize_];
  int pos = inf.tellg();
 
  // parse map data
  int i = 1;
  do {
    inf.seekg(pos);
    inf.getline(s, lineSize_);
 
    pos = inf.tellg();
 
    if (string(s).empty()) {
      continue;  // remove empty lines
    }
 
    istringstream lin(s);
 
    double dataw;
    int j = 1;
    do {
      lin >> dataw;
      SetBinContent(j, i, dataw);
      j++;
    } while (lin.good());
    i++;
  } while (inf.good());
 
  if (inf.eof()) {
    mapFile_ = mapfile;
    return true;
  } else {
    // cout<<"error"<<endl;
    return false;
  }
 
  mapFile_ = mapfile;
  return true;
}
 
double PFResolutionMap::getRes(double eta, double phi, double e, int MapEta) {
  constexpr double fMinEta = -2.95;
  constexpr double fMaxEta = 2.95;
  constexpr double fMinE = 0;
  constexpr double fMaxE = 100;
 
  if (eta < fMinEta)
    eta = fMinEta + 0.001;
  if (eta > fMaxEta)
    eta = fMaxEta - 0.001;
 
  if (e < fMinE)
    e = fMinE + 0.001;
  if (e > fMaxE)
    e = fMaxE - 0.001;
 
  unsigned bin = FindBin(TMath::Abs(eta), e);
 
  double res = GetBinContent(bin);
  if (MapEta > -1) {
    if ((eta < 1.48) && IsInAPhiCrack(phi, eta)) {
      if (MapEta == 1)
        res *= 1.88;
      else
        res *= 1.65;
    }
  }
  return res;
}
 
int PFResolutionMap::FindBin(double eta, double e, double z) {
  if (e >= GetYaxis()->GetXmax())
    e = GetYaxis()->GetXmax() - 0.001;
 
  return TH2D::FindBin(eta, e);
}
 
ostream& operator<<(ostream& outf, const PFResolutionMap& rm) {
  if (!outf.good())
    return outf;
 
  // first data describes the map
  outf << rm.GetNbinsX() << endl;
  outf << rm.GetXaxis()->GetXmin() << endl;
  outf << rm.GetXaxis()->GetXmax() << endl;
 
  outf << rm.GetNbinsY() << endl;
  outf << rm.GetYaxis()->GetXmin() << endl;
  outf << rm.GetYaxis()->GetXmax() << endl;
 
  for (int ie = 1; ie <= rm.GetNbinsY(); ie++) {
    for (int ieta = 1; ieta <= rm.GetNbinsX(); ieta++) {
      outf << rm.GetBinContent(ieta, ie) << "\t";
    }
    outf << endl;
  }
 
  return outf;
}
 
bool PFResolutionMap::IsInAPhiCrack(double phi, double eta) {
  double dminPhi = dCrackPhi(phi, eta);
  bool Is = (TMath::Abs(dminPhi) < 0.005);
  return Is;
}
 
//useful to compute the signed distance to the closest crack in the barrel
double PFResolutionMap::minimum(double a, double b) {
  if (TMath::Abs(b) < TMath::Abs(a))
    a = b;
  return a;
}
 
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
 
//compute the unsigned distance to the closest phi-crack in the barrel
double PFResolutionMap::dCrackPhi(double phi, double eta) {
  constexpr double pi = M_PI;  // 3.14159265358979323846;
  constexpr double twopi = 2. * pi;
  constexpr double twopiO18 = pi / 9;
 
  //Location of the 18 phi-cracks
  constexpr double c0 = 2.97025;
  constexpr std::array<double, 18> cPhi{{c0,
                                         c0 - twopiO18,
                                         c0 - 2 * twopiO18,
                                         c0 - 3 * twopiO18,
                                         c0 - 4 * twopiO18,
                                         c0 - 5 * twopiO18,
                                         c0 - 6 * twopiO18,
                                         c0 - 7 * twopiO18,
                                         c0 - 8 * twopiO18,
                                         c0 - 9 * twopiO18,
                                         c0 - 10 * twopiO18,
                                         c0 - 11 * twopiO18,
                                         c0 - 12 * twopiO18,
                                         c0 - 13 * twopiO18,
                                         c0 - 14 * twopiO18,
                                         c0 - 15 * twopiO18,
                                         c0 - 16 * twopiO18,
                                         c0 - 17 * twopiO18}};
 
  //Shift of this location if eta<0
  constexpr double delta_cPhi = 0.00638;
 
  double m;  //the result
 
  //the location is shifted
  if (eta < 0) {
    phi += delta_cPhi;
    if (phi > pi)
      phi -= twopi;
  }
  if (phi >= -pi && phi <= pi) {
    //the problem of the extrema
    if (phi < cPhi[17] || phi >= cPhi[0]) {
      if (phi < 0)
        phi += twopi;
      m = minimum(phi - cPhi[0], phi - cPhi[17] - twopi);
    }
 
    //between these extrema...
    else {
      bool OK = false;
      unsigned i = 16;
      while (!OK) {
        if (phi < cPhi[i]) {
          m = minimum(phi - cPhi[i + 1], phi - cPhi[i]);
          OK = true;
        } else
          i -= 1;
      }
    }
  } else {
    m = 0.;  //if there is a problem, we assum that we are in a crack
    edm::LogWarning("PFResolutionMap:Problem") << "Problem in dminphi";
  }
  if (eta < 0)
    m = -m;  //because of the disymetry
  return m;
}