* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.1.2.3 2000/06/09 21:03:09 morsch
-Make includes consistent with new file structure.
+/* $Id$ */
-Revision 1.1.2.2 2000/06/09 12:58:05 gosset
-Removed comment beginnings in Log sections of .cxx files
-Suppressed most violations of coding rules
-
-Revision 1.1.2.1 2000/06/07 14:44:53 gosset
-Addition of files for track reconstruction in C++
-*/
-
-//__________________________________________________________________________
+///////////////////////////////////////////////////
+//
+// Track parameters
+// in
+// ALICE
+// dimuon
+// spectrometer
//
-// Track parameters in ALICE dimuon spectrometer
-//__________________________________________________________________________
+///////////////////////////////////////////////////
-#include <iostream.h>
+#include <Riostream.h>
-#include "AliCallf77.h"
-#include "AliMUON.h"
-#include "AliMUONHitForRec.h"
-#include "AliMUONSegment.h"
-#include "AliMUONTrackParam.h"
-#include "AliMUONChamber.h"
-#include "AliRun.h"
+#include "AliMUONTrackParam.h"
+#include "AliESDMuonTrack.h"
+#include "AliLog.h"
+#include "AliMUONHitForRec.h"
+/// \cond CLASSIMP
ClassImp(AliMUONTrackParam) // Class implementation in ROOT context
+/// \endcond
-#ifndef WIN32
-# define reco_ghelix reco_ghelix_
-#else
-# define reco_ghelix RECO_GHELIX
-#endif
+ //_________________________________________________________________________
+AliMUONTrackParam::AliMUONTrackParam()
+ : TObject(),
+ fInverseBendingMomentum(0.),
+ fBendingSlope(0.),
+ fNonBendingSlope(0.),
+ fZ(0.),
+ fBendingCoor(0.),
+ fNonBendingCoor(0.),
+ fHitForRecPtr(0x0)
+{
+ /// Constructor
+}
-extern "C"
+ //_________________________________________________________________________
+AliMUONTrackParam::AliMUONTrackParam(const AliMUONTrackParam& theMUONTrackParam)
+ : TObject(theMUONTrackParam),
+ fInverseBendingMomentum(theMUONTrackParam.fInverseBendingMomentum),
+ fBendingSlope(theMUONTrackParam.fBendingSlope),
+ fNonBendingSlope(theMUONTrackParam.fNonBendingSlope),
+ fZ(theMUONTrackParam.fZ),
+ fBendingCoor(theMUONTrackParam.fBendingCoor),
+ fNonBendingCoor(theMUONTrackParam.fNonBendingCoor),
+ fHitForRecPtr(theMUONTrackParam.fHitForRecPtr)
{
-void type_of_call reco_ghelix(Double_t &Charge, Double_t &StepLength, Double_t *VGeant3, Double_t *VGeant3New);
+ /// Copy constructor
}
-// Inline functions for Get and Set: inline removed because it does not work !!!!
-Double_t AliMUONTrackParam::GetInverseBendingMomentum(void) {
- // Get fInverseBendingMomentum
- return fInverseBendingMomentum;}
-void AliMUONTrackParam::SetInverseBendingMomentum(Double_t InverseBendingMomentum) {
- // Set fInverseBendingMomentum
- fInverseBendingMomentum = InverseBendingMomentum;}
-Double_t AliMUONTrackParam::GetBendingSlope(void) {
- // Get fBendingSlope
- return fBendingSlope;}
-void AliMUONTrackParam::SetBendingSlope(Double_t BendingSlope) {
- // Set fBendingSlope
- fBendingSlope = BendingSlope;}
-Double_t AliMUONTrackParam::GetNonBendingSlope(void) {
- // Get fNonBendingSlope
- return fNonBendingSlope;}
-void AliMUONTrackParam::SetNonBendingSlope(Double_t NonBendingSlope) {
- // Set fNonBendingSlope
- fNonBendingSlope = NonBendingSlope;}
-Double_t AliMUONTrackParam::GetZ(void) {
- // Get fZ
- return fZ;}
-void AliMUONTrackParam::SetZ(Double_t Z) {
- // Set fZ
- fZ = Z;}
-Double_t AliMUONTrackParam::GetBendingCoor(void) {
- // Get fBendingCoor
- return fBendingCoor;}
-void AliMUONTrackParam::SetBendingCoor(Double_t BendingCoor) {
- // Set fBendingCoor
- fBendingCoor = BendingCoor;}
-Double_t AliMUONTrackParam::GetNonBendingCoor(void) {
- // Get fNonBendingCoor
- return fNonBendingCoor;}
-void AliMUONTrackParam::SetNonBendingCoor(Double_t NonBendingCoor) {
- // Set fNonBendingCoor
- fNonBendingCoor = NonBendingCoor;}
+ //_________________________________________________________________________
+AliMUONTrackParam& AliMUONTrackParam::operator=(const AliMUONTrackParam& theMUONTrackParam)
+{
+ /// Asignment operator
+ if (this == &theMUONTrackParam)
+ return *this;
+
+ // base class assignement
+ TObject::operator=(theMUONTrackParam);
+
+ fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum;
+ fBendingSlope = theMUONTrackParam.fBendingSlope;
+ fNonBendingSlope = theMUONTrackParam.fNonBendingSlope;
+ fZ = theMUONTrackParam.fZ;
+ fBendingCoor = theMUONTrackParam.fBendingCoor;
+ fNonBendingCoor = theMUONTrackParam.fNonBendingCoor;
+ fHitForRecPtr = theMUONTrackParam.fHitForRecPtr;
+
+ return *this;
+}
//__________________________________________________________________________
-void AliMUONTrackParam::ExtrapToZ(Double_t Z)
+AliMUONTrackParam::~AliMUONTrackParam()
{
- // Track parameter extrapolation to the plane at "Z".
- // On return, the track parameters resulting from the extrapolation
- // replace the current track parameters.
- // Use "reco_ghelix" which should be replaced by something else !!!!
- if (this->fZ == Z) return; // nothing to be done if same Z
- Double_t forwardBackward; // +1 if forward, -1 if backward
- if (Z > this->fZ) forwardBackward = 1.0;
- else forwardBackward = -1.0;
- Double_t temp, vGeant3[7], vGeant3New[7]; // 7 in parameter ????
- Int_t iGeant3, stepNumber;
- Int_t maxStepNumber = 5000; // in parameter ????
- // For safety: return kTRUE or kFALSE ????
- // Parameter vector for calling GHELIX in Geant3
- SetGeant3Parameters(vGeant3, forwardBackward);
- // For use of reco_ghelix...: invert X and Y, PX/PTOT and PY/PTOT !!!!
- temp = vGeant3[0]; vGeant3[0] = vGeant3[1]; vGeant3[1] = temp;
- temp = vGeant3[3]; vGeant3[3] = vGeant3[4]; vGeant3[4] = temp;
- // charge must be changed with momentum for backward motion
- Double_t charge =
- forwardBackward * TMath::Sign(Double_t(1.0), this->fInverseBendingMomentum);
- Double_t stepLength = 6.0; // in parameter ????
- // Extrapolation loop
- stepNumber = 0;
- while (((forwardBackward * (vGeant3[2] - Z)) <= 0.0) &&
- (stepNumber < maxStepNumber)) {
- stepNumber++;
- // call Geant3 "ghelix" subroutine through a copy in "reco_muon.F":
- // the true function should be called, but how ???? and remove prototyping ...
- reco_ghelix(charge, stepLength, vGeant3, vGeant3New);
- if ((forwardBackward * (vGeant3New[2] - Z)) > 0.0) break; // one is beyond Z
- // better use TArray ????
- for (iGeant3 = 0; iGeant3 < 7; iGeant3++)
- {vGeant3[iGeant3] = vGeant3New[iGeant3];}
- }
- // check maxStepNumber ????
- // For use of reco_ghelix...:
- // invert back X and Y, PX/PTOT and PY/PTOT, both for vGeant3 and vGeant3New !!!!
- temp = vGeant3[0]; vGeant3[0] = vGeant3[1]; vGeant3[1] = temp;
- temp = vGeant3New[0]; vGeant3New[0] = vGeant3New[1]; vGeant3New[1] = temp;
- temp = vGeant3[3]; vGeant3[3] = vGeant3[4]; vGeant3[4] = temp;
- temp = vGeant3New[3]; vGeant3New[3] = vGeant3New[4]; vGeant3New[4] = temp;
- // Interpolation back to exact Z (2nd order)
- // should be in function ???? using TArray ????
- Double_t dZ12 = vGeant3New[2] - vGeant3[2]; // 1->2
- Double_t dZ1i = Z - vGeant3[2]; // 1-i
- Double_t dZi2 = vGeant3New[2] - Z; // i->2
- Double_t xPrime = (vGeant3New[0] - vGeant3[0]) / dZ12;
- Double_t xSecond =
- ((vGeant3New[3] / vGeant3New[5]) - (vGeant3[3] / vGeant3[5])) / dZ12;
- Double_t yPrime = (vGeant3New[1] - vGeant3[1]) / dZ12;
- Double_t ySecond =
- ((vGeant3New[4] / vGeant3New[5]) - (vGeant3[4] / vGeant3[5])) / dZ12;
- vGeant3[0] = vGeant3[0] + xPrime * dZ1i - 0.5 * xSecond * dZ1i * dZi2; // X
- vGeant3[1] = vGeant3[1] + yPrime * dZ1i - 0.5 * ySecond * dZ1i * dZi2; // Y
- vGeant3[2] = Z; // Z
- Double_t xPrimeI = xPrime - 0.5 * xSecond * (dZi2 - dZ1i);
- Double_t yPrimeI = yPrime - 0.5 * ySecond * (dZi2 - dZ1i);
- vGeant3[5] =
- 1.0 / TMath::Sqrt(1.0 + xPrimeI * xPrimeI + yPrimeI * yPrimeI); // PZ/PTOT
- vGeant3[3] = xPrimeI * vGeant3[5]; // PX/PTOT
- vGeant3[4] = yPrimeI * vGeant3[5]; // PY/PTOT
- // Track parameters from Geant3 parameters
- GetFromGeant3Parameters(vGeant3, charge);
+/// Destructor
+/// Update the number of TrackHit's connected to the attached HitForRec if any
+ if (fHitForRecPtr) fHitForRecPtr->SetNTrackHits(fHitForRecPtr->GetNTrackHits() - 1); // decrement NTrackHits of hit
+}
+
+ //__________________________________________________________________________
+void AliMUONTrackParam::SetTrackParam(AliMUONTrackParam& theMUONTrackParam)
+{
+ /// Set track parameters from "TrackParam" leaving pointer to fHitForRecPtr unchanged
+ fInverseBendingMomentum = theMUONTrackParam.fInverseBendingMomentum;
+ fBendingSlope = theMUONTrackParam.fBendingSlope;
+ fNonBendingSlope = theMUONTrackParam.fNonBendingSlope;
+ fZ = theMUONTrackParam.fZ;
+ fBendingCoor = theMUONTrackParam.fBendingCoor;
+ fNonBendingCoor = theMUONTrackParam.fNonBendingCoor;
+
+}
+
+ //__________________________________________________________________________
+AliMUONHitForRec* AliMUONTrackParam::GetHitForRecPtr(void) const
+{
+/// return pointer to HitForRec attached to the current TrackParam
+/// this method should not be called when fHitForRecPtr == NULL
+ if (!fHitForRecPtr) AliWarning("AliMUONTrackParam::GetHitForRecPtr: fHitForRecPtr == NULL");
+ return fHitForRecPtr;
}
//__________________________________________________________________________
-void AliMUONTrackParam::SetGeant3Parameters(Double_t *VGeant3, Double_t ForwardBackward)
+Int_t AliMUONTrackParam::Compare(const TObject* TrackParam) const
{
- // Set vector of Geant3 parameters pointed to by "VGeant3"
- // from track parameters in current AliMUONTrackParam.
- // Since AliMUONTrackParam is only geometry, one uses "ForwardBackward"
- // to know whether the particle is going forward (+1) or backward (-1).
- VGeant3[0] = this->fNonBendingCoor; // X
- VGeant3[1] = this->fBendingCoor; // Y
- VGeant3[2] = this->fZ; // Z
- Double_t pYZ = TMath::Abs(1.0 / this->fInverseBendingMomentum);
- Double_t pZ =
- pYZ / TMath::Sqrt(1.0 + this->fBendingSlope * this->fBendingSlope);
- VGeant3[6] =
- TMath::Sqrt(pYZ * pYZ +
- pZ * pZ * this->fNonBendingSlope * this->fNonBendingSlope); // PTOT
- VGeant3[5] = ForwardBackward * pZ / VGeant3[6]; // PZ/PTOT
- VGeant3[3] = this->fNonBendingSlope * VGeant3[5]; // PX/PTOT
- VGeant3[4] = this->fBendingSlope * VGeant3[5]; // PY/PTOT
+/// "Compare" function to sort with decreasing Z (spectro. muon Z <0).
+/// Returns 1 (0, -1) if Z of current TrackHit
+/// is smaller than (equal to, larger than) Z of TrackHit
+ if (fHitForRecPtr->GetZ() < ((AliMUONTrackParam*)TrackParam)->fHitForRecPtr->GetZ()) return(1);
+ else if (fHitForRecPtr->GetZ() == ((AliMUONTrackParam*)TrackParam)->fHitForRecPtr->GetZ()) return(0);
+ else return(-1);
+}
+
+ //_________________________________________________________________________
+void AliMUONTrackParam::GetParamFrom(const AliESDMuonTrack& esdMuonTrack)
+{
+ /// assigned value form ESD track.
+ fInverseBendingMomentum = esdMuonTrack.GetInverseBendingMomentum();
+ fBendingSlope = TMath::Tan(esdMuonTrack.GetThetaY());
+ fNonBendingSlope = TMath::Tan(esdMuonTrack.GetThetaX());
+ fZ = esdMuonTrack.GetZ();
+ fBendingCoor = esdMuonTrack.GetBendingCoor();
+ fNonBendingCoor = esdMuonTrack.GetNonBendingCoor();
+}
+
+ //_________________________________________________________________________
+void AliMUONTrackParam::SetParamFor(AliESDMuonTrack& esdMuonTrack)
+{
+ /// assigned value form ESD track.
+ esdMuonTrack.SetInverseBendingMomentum(fInverseBendingMomentum);
+ esdMuonTrack.SetThetaX(TMath::ATan(fNonBendingSlope));
+ esdMuonTrack.SetThetaY(TMath::ATan(fBendingSlope));
+ esdMuonTrack.SetZ(fZ);
+ esdMuonTrack.SetBendingCoor(fBendingCoor);
+ esdMuonTrack.SetNonBendingCoor(fNonBendingCoor);
+}
+
+ //__________________________________________________________________________
+Double_t AliMUONTrackParam::Px() const
+{
+ /// return px from track paramaters
+ Double_t pYZ, pZ, pX;
+ pYZ = 0;
+ if ( TMath::Abs(fInverseBendingMomentum) > 0 )
+ pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
+ pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
+ pX = pZ * fNonBendingSlope;
+ return pX;
}
//__________________________________________________________________________
-void AliMUONTrackParam::GetFromGeant3Parameters(Double_t *VGeant3, Double_t Charge)
+Double_t AliMUONTrackParam::Py() const
{
- // Get track parameters in current AliMUONTrackParam
- // from Geant3 parameters pointed to by "VGeant3".
- // "InverseBendingMomentum" is signed with "Charge".
- this->fNonBendingCoor = VGeant3[0]; // X
- this->fBendingCoor = VGeant3[1]; // Y
- this->fZ = VGeant3[2]; // Z
- Double_t pYZ = VGeant3[6] * TMath::Sqrt(1.0 - VGeant3[3] * VGeant3[3]);
- this->fInverseBendingMomentum = Charge / pYZ;
- this->fBendingSlope = VGeant3[4] / VGeant3[5];
- this->fNonBendingSlope = VGeant3[3] / VGeant3[5];
+ /// return px from track paramaters
+ Double_t pYZ, pZ, pY;
+ pYZ = 0;
+ if ( TMath::Abs(fInverseBendingMomentum) > 0 )
+ pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
+ pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
+ pY = pZ * fBendingSlope;
+ return pY;
}
//__________________________________________________________________________
-void AliMUONTrackParam::ExtrapToStation(Int_t Station, AliMUONTrackParam *TrackParam)
+Double_t AliMUONTrackParam::Pz() const
{
- // Track parameters extrapolated from current track parameters ("this")
- // to both chambers of the station(0..) "Station"
- // are returned in the array (dimension 2) of track parameters
- // pointed to by "TrackParam" (index 0 and 1 for first and second chambers).
- Double_t extZ[2], z1, z2;
- Int_t i1, i2;
- AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ????
- // range of Station to be checked ????
- z1 = (&(pMUON->Chamber(2 * Station)))->Z(); // Z of first chamber
- z2 = (&(pMUON->Chamber(2 * Station + 1)))->Z(); // Z of second chamber
- // First and second Z to extrapolate at
- if ((z1 > this->fZ) && (z2 > this->fZ)) {i1 = 0; i2 = 1;}
- else if ((z1 < this->fZ) && (z2 < this->fZ)) {i1 = 1; i2 = 0;}
+ /// return px from track paramaters
+ Double_t pYZ, pZ;
+ pYZ = 0;
+ if ( TMath::Abs(fInverseBendingMomentum) > 0 )
+ pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
+ pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
+ return pZ;
+}
+
+ //__________________________________________________________________________
+Double_t AliMUONTrackParam::P() const
+{
+ /// return p from track paramaters
+ Double_t pYZ, pZ, p;
+ pYZ = 0;
+ if ( TMath::Abs(fInverseBendingMomentum) > 0 )
+ pYZ = TMath::Abs(1.0 / fInverseBendingMomentum);
+ pZ = -pYZ / (TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope)); // spectro. (z<0)
+ p = TMath::Abs(pZ) *
+ TMath::Sqrt(1.0 + fBendingSlope * fBendingSlope + fNonBendingSlope * fNonBendingSlope);
+ return p;
+
+}
+
+//_____________________________________________-
+void AliMUONTrackParam::Print(Option_t* opt) const
+{
+ /// Printing TrackParam information
+ /// "full" option for printing all the information about the TrackParam
+ TString sopt(opt);
+ sopt.ToUpper();
+
+ if ( sopt.Contains("FULL") ) {
+ cout << "<AliMUONTrackParam> Bending P=" << setw(5) << setprecision(3) << 1./GetInverseBendingMomentum() <<
+ ", NonBendSlope=" << setw(5) << setprecision(3) << GetNonBendingSlope()*180./TMath::Pi() <<
+ ", BendSlope=" << setw(5) << setprecision(3) << GetBendingSlope()*180./TMath::Pi() <<
+ ", (x,y,z)_IP=(" << setw(5) << setprecision(3) << GetNonBendingCoor() <<
+ "," << setw(5) << setprecision(3) << GetBendingCoor() <<
+ "," << setw(5) << setprecision(3) << GetZ() <<
+ ") cm, (px,py,pz)=(" << setw(5) << setprecision(3) << Px() <<
+ "," << setw(5) << setprecision(3) << Py() <<
+ "," << setw(5) << setprecision(3) << Pz() << ") GeV/c" << endl;
+ }
else {
- cout << "ERROR in AliMUONTrackParam::CreateExtrapSegmentInStation" << endl;
- cout << "Starting Z (" << this->fZ << ") in between z1 (" << z1 <<
- ") and z2 (" << z2 << ") of station(0..) " << Station << endl;
+ cout << "<AliMUONTrackParam>" << endl;
}
- extZ[i1] = z1;
- extZ[i2] = z2;
- // copy of track parameters
- TrackParam[i1] = *this;
- // first extrapolation
- (&(TrackParam[i1]))->ExtrapToZ(extZ[0]);
- TrackParam[i2] = TrackParam[i1];
- // second extrapolation
- (&(TrackParam[i2]))->ExtrapToZ(extZ[1]);
- return;
+
}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff