PndSttRecoHit2.cxx

Go to the documentation of this file.

// The STT point is not defined by the (x, y, z) coordinates, but we ONLY know the
// (x, y) coordinates of the wire center (not the z!); moreover we know the drift
// radius. In order to find the MEASURED POINT to be used in the Kalman fit a 
// preliminary propagation must be performed to the point of closest approach to
// the firing wire.
// The plane is a virtual detector plane defined via:
// dj = wvi - vpf     (U coordinate in DetPlane)
// dk = wiredirection (V coordinate in DetPlane)
// (see WireMeasurement.cpp)
//
// input: 8 entries
// 0-1-2 ==> x,y,z of the 1st extremity of the firing wire;
// 3-4-5 ==> x,y,z of the 2nd extremity of the firing wire;
// 6     ==> drift radius;

//modified by Elisabetta Prencipe 19/5/2014

// This Class' Header ------------------
#include "PndSttRecoHit2.h"

// C/C++ Headers ----------------------

// Collaborating Class Headers --------
#include "PndSttHit.h"
#include "PndSttTube.h"
#include "PndSttMapCreator.h"
#include "PndSttTubeMap.h"
#include "PndGeoSttPar.h"
#include "FairRuntimeDb.h"
#include "FairRunAna.h"

#include "TMath.h"

// Class Member definitions -----------
using namespace std;

ClassImp(PndSttRecoHit2)


  PndSttRecoHit2::~PndSttRecoHit2()
{}

PndSttRecoHit2::PndSttRecoHit2()
  : genfit::WireMeasurement(NparHitRep)
{
 
}

// TO BE CHANGED TO USE TUBE ARRAY
PndSttRecoHit2::PndSttRecoHit2(PndSttHit *currenthit) : genfit::WireMeasurement(NparHitRep){

  FairRuntimeDb* rtdb = FairRunAna::Instance()->GetRuntimeDb();
  PndGeoSttPar *sttParameters = (PndGeoSttPar*) rtdb->getContainer("PndGeoSttPar");
  Int_t tubeID = currenthit->GetTubeID();
  PndSttMapCreator *mapper = new PndSttMapCreator(sttParameters);
  PndSttTube *tube = (PndSttTube*) mapper->GetTubeFromTubeID(tubeID);

  // wire1(3), wire2(3), rdrift
  TVector3 wiredirection = tube->GetWireDirection();
  TVector3 wiredirection2 = tube->GetHalfLength() * wiredirection; 
  TVector3 cenposition = tube->GetPosition(); 
  TVector3 wire1, wire2;
  wire1 = cenposition - wiredirection2;
  wire2 = cenposition + wiredirection2;
  //   cout << "Wiredirection, wire1, wire2 " << endl;
  //   wiredirection.Print();
  //   wire1.Print();
  //   wire2.Print();
  rawHitCoords_[0] = wire1.X();
  rawHitCoords_[1] = wire1.Y();
  rawHitCoords_[2] = wire1.Z();
  rawHitCoords_[3] = wire2.X();
  rawHitCoords_[4] = wire2.Y();
  rawHitCoords_[5] = wire2.Z();
  rawHitCoords_[6] = currenthit->GetIsochrone();

  // errors on drift radius 
  for(int i = 0; i < NparHitRep; i++) for(int j = 0; j < NparHitRep; j++) rawHitCov_[i][j] = 0.;
  //   rawHitCov_[6][6] = 0.0100 * 0.0100;
  rawHitCov_[6][6] = pow(currenthit->GetIsochroneError(), 2);

  // cut on distance
  setMaxDistance(0.5);
}

// TO BE CHANGED TO USE TUBE ARRAY
PndSttRecoHit2::PndSttRecoHit2(PndSttHit *currenthit, const genfit::TrackCandHit* hit, TClonesArray *tubeArray) : genfit::WireMeasurement(NparHitRep){

  setDetId(hit->getDetId());
  setHitId(hit->getHitId());

  Int_t tubeID = currenthit->GetTubeID();
  PndSttTube* tube = nullptr;
  if (tubeArray != nullptr){
      tube = (PndSttTube *) tubeArray->At(tubeID);
  } else {
      tube = PndSttTubeMap::Instance()->GetTube(tubeID);
  }

  // wire1(3), wire2(3), rdrift
  TVector3 wiredirection = tube->GetWireDirection();
  TVector3 wiredirection2 = tube->GetHalfLength() * wiredirection; 
  TVector3 cenposition = tube->GetPosition(); 
  TVector3 wire1, wire2;
  wire1 = cenposition - wiredirection2;
  wire2 = cenposition + wiredirection2;
  //   cout << "Wiredirection, wire1, wire2 " << endl;
  //   wiredirection.Print();
  //   wire1.Print();
  //   wire2.Print();
  rawHitCoords_[0] = wire1.X();
  rawHitCoords_[1] = wire1.Y();
  rawHitCoords_[2] = wire1.Z();
  rawHitCoords_[3] = wire2.X();
  rawHitCoords_[4] = wire2.Y();
  rawHitCoords_[5] = wire2.Z();
  rawHitCoords_[6] = currenthit->GetIsochrone();

  // errors on drift radius 
  for(int i = 0; i < NparHitRep; i++) for(int j = 0; j < NparHitRep; j++) rawHitCov_[i][j] = 0.;
  //   rawHitCov_[6][6] = 0.0100 * 0.0100;
  rawHitCov_[6][6] = pow(currenthit->GetIsochroneError(), 2);

  // cut on distance
  setMaxDistance(0.5);
}