--- /dev/null
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/*
+$Log$
+*/
+///////////////////////////////////////////////////////////////////////////////
+// //
+// Time Projection Chamber track hits object //
+//
+// Origin: Marian Ivanov , GSI Darmstadt
+//
+// AliTPCTrackHitsV2
+// Container for Track Hits - based on standard TClonesArray -
+// fArray of AliTPCTrackHitsParamV2
+// In AliTPCTrackHitsParamV2 - parameterization of the track segment is stored
+// for each of the track segment - relative position ( distance between hits) and
+// charge of the hits is stored - comparing to classical TClonesArray of AliTPChit -
+// comperssion factor of 5-7 (depending on the required precision) -
+// In future release AliTPCTrackHitsV2 - will replace old AliTPCTrackHits - which were not
+// based on standard ROOT containers
+// Basic function:
+// // during building Container
+// AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x, Double_t y, Double_t z,Int_t q)
+// void SetHitPrecision(Double_t prec) {fPrecision=prec;}
+// void SetStepPrecision(Double_t prec) {fStep=prec;}
+// Bool_t FlushHitStack(Bool_t force=kTRUE);
+// //at the end necessary to have Container in consistent state
+//
+// // looping over Container
+// Bool_t First(), Bool_t Next() - iterators - return status of the operation
+// AliTPChit * GetHit(); - return current hit
+
+
+//Begin_Html
+/*
+<img src="gif/AliTPCTrackHitsV2.gif">
+*/
+//End_Html
+// //
+// //
+///////////////////////////////////////////////////////////////////////////////
+
+//#include "TVector3.h"
+#include "AliTPCTrackHitsV2.h"
+
+#include "TClonesArray.h"
+#include "AliTPC.h"
+
+#include <iostream.h>
+
+
+
+ClassImp(AliTPCTrackHitsV2)
+ClassImp(AliTrackHitsParamV2)
+
+ //
+Int_t AliTrackHitsParamV2::fgCounter1 =0;
+Int_t AliTrackHitsParamV2::fgCounter2 =0;
+//
+Int_t AliTPCTrackHitsV2::fgCounter1 =0;
+Int_t AliTPCTrackHitsV2::fgCounter2 =0;
+//
+const Double_t AliTPCTrackHitsV2::fgkPrecision=1e-6; //precision
+const Double_t AliTPCTrackHitsV2::fgkPrecision2=1e-20; //precision
+
+
+
+
+struct AliTPCCurrentHitV2 {
+ AliTPChit fHit;
+ UInt_t fParamIndex;// - current param pointer
+ UInt_t fStackIndex; // - current hit stack index
+ Double_t fR; //current Radius
+ Bool_t fStatus; //current status
+};
+
+
+struct AliTPCTempHitInfoV2 {
+ enum { fkStackSize = 10000};
+ AliTPCTempHitInfoV2();
+ void NewParam(Double_t r, Double_t z, Double_t fi, Int_t q);
+ void SetHit(Double_t r, Double_t z, Double_t fi, Int_t q);
+ Double_t * GetPosition(Int_t index){return &fPositionStack[index*3];}
+ void UpdateParam(Double_t maxdelta); //recal
+ void Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
+ Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
+ Double_t fSumX4, Int_t n,
+ Double_t &a, Double_t &b, Double_t &c);
+ void Fit(AliTrackHitsParamV2 * param);
+ Double_t fSumDr; //
+ Double_t fSumDr2; //
+ Double_t fSumDr3; //
+ Double_t fSumDr4; //
+ Double_t fSumDFi; //
+ Double_t fSumDFiDr; //
+ Double_t fSumDFiDr2;//
+ Double_t fSumDZ; //
+ Double_t fSumDZDr; //
+ Double_t fSumDZDr2; //
+ Double_t fOldR; //previos r
+ Double_t fPositionStack[3*fkStackSize]; //position stack
+ UInt_t fQStack[fkStackSize]; //Q stack
+ UInt_t fStackIndex; //current stack index
+ // UInt_t fInfoIndex; //current track info index
+ UInt_t fParamIndex; //current track parameters index
+ // AliTrackHitsInfo * fInfo; //current track info
+ AliTrackHitsParamV2 * fParam; //current track param
+};
+
+
+AliTPCTempHitInfoV2::AliTPCTempHitInfoV2()
+{
+ //
+ //set to default value
+ fSumDr=fSumDr2=fSumDr3=fSumDr4=
+ fSumDFi=fSumDFiDr=fSumDFiDr2=
+ fSumDZ=fSumDZDr=fSumDZDr2=0;
+ fStackIndex = 0;
+ // fInfoIndex = 0;
+ fParamIndex = 0;
+}
+
+
+void AliTPCTempHitInfoV2::NewParam(Double_t r, Double_t z, Double_t fi, Int_t q)
+{
+ //
+ //reset stack and sum parameters
+ //store line initial point
+ fSumDr=fSumDr2=fSumDr3=fSumDr4=
+ fSumDFi=fSumDFiDr=fSumDFiDr2=
+ fSumDZ=fSumDZDr=fSumDZDr2=0;
+ fStackIndex=0;
+ fParam->fR = r;
+ fOldR = r;
+ fParam->fZ = z;
+ fParam->fFi = fi;
+ fParam->fAn = 0.;
+ fParam->fAd = 0.;
+ fParam->fTheta =0.;
+ fParam->fThetaD =0.;
+ SetHit(r,z,fi,q);
+}
+
+void AliTPCTempHitInfoV2::SetHit(Double_t r, Double_t z, Double_t fi, Int_t q)
+{
+ //
+ //add hit to the stack
+ //recalculate new estimete of line parameters
+ Double_t *f = GetPosition(fStackIndex);
+ f[0] = r;
+ f[1] = z;
+ f[2] = fi;
+ fQStack[fStackIndex]=q;
+ if (fStackIndex==0) return;
+ Double_t dr = (r-fParam->fR);
+ if (TMath::Abs(dr)<AliTPCTrackHitsV2::fgkPrecision) dr =AliTPCTrackHitsV2::fgkPrecision;
+ Double_t dfi = fi-fParam->fFi;
+ Double_t dz = z -fParam->fZ;
+ Double_t dr2 =dr*dr;
+ Double_t dr3 =dr2*dr;
+ Double_t dr4 =dr3*dr;
+ fSumDr +=dr;
+ fSumDr2+=dr2;
+ fSumDr3+=dr3;
+ fSumDr4+=dr4;
+ fSumDFi +=dfi;
+ fSumDFiDr+=dfi*dr;
+ fSumDFiDr2+=dfi*dr2;
+ fSumDZ +=dz;
+ fSumDZDr+=dz*dr;
+ fSumDZDr2+=dz*dr2;
+
+ //update fit parameters
+ //
+ Double_t det = fSumDr2*fSumDr4-fSumDr3*fSumDr3;
+ if (TMath::Abs(det)<AliTPCTrackHitsV2::fgkPrecision2) return;
+ if ( ( fStackIndex>1 ) ){
+ fParam->fAn = (fSumDr4*fSumDFiDr-fSumDr3*fSumDFiDr2)/det;
+ fParam->fAd = (fSumDr2*fSumDFiDr2-fSumDr3*fSumDFiDr)/det;
+ }
+ else
+ fParam->fAn = fSumDFiDr/fSumDr2;
+ if ( ( fStackIndex>1 ) ){
+ fParam->fTheta = (fSumDr4*fSumDZDr-fSumDr3*fSumDZDr2)/det;
+ fParam->fThetaD= (fSumDr2*fSumDZDr2-fSumDr3*fSumDZDr)/det;
+ }
+ else
+ fParam->fTheta = fSumDZDr/fSumDr2;
+}
+
+
+void AliTPCTempHitInfoV2::UpdateParam(Double_t maxdelta)
+{
+ //recalc parameters not fixing origin point
+ if (fStackIndex>5){
+ Double_t a,b,c;
+ a=b=c=0;
+ Fit2(fSumDFi, fSumDFiDr, fSumDFiDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
+ fStackIndex, a,b,c);
+ if (TMath::Abs(a)<maxdelta){
+ fParam->fFi +=a/fParam->fR;
+ fParam->fAn = b;
+ fParam->fAd = c;
+ }
+ Fit2(fSumDZ, fSumDZDr, fSumDZDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
+ fStackIndex, a,b,c) ;
+ if (TMath::Abs(a)<maxdelta){
+ fParam->fZ +=a;
+ fParam->fTheta = b;
+ fParam->fThetaD = c;
+ }
+ }
+
+}
+void AliTPCTempHitInfoV2::Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
+ Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
+ Double_t fSumX4, Int_t n,
+ Double_t &a, Double_t &b, Double_t &c)
+{
+ //fit of second order
+ Double_t det =
+ n* (fSumX2*fSumX4-fSumX3*fSumX3) -
+ fSumX* (fSumX*fSumX4-fSumX3*fSumX2)+
+ fSumX2* (fSumX*fSumX3-fSumX2*fSumX2);
+
+ if (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) {
+ a =
+ (fSumY * (fSumX2*fSumX4-fSumX3*fSumX3)-
+ fSumX *(fSumYX*fSumX4-fSumYX2*fSumX3)+
+ fSumX2*(fSumYX*fSumX3-fSumYX2*fSumX2))/det;
+ b=
+ (n*(fSumYX*fSumX4-fSumX3*fSumYX2)-
+ fSumY*(fSumX*fSumX4-fSumX3*fSumX2)+
+ fSumX2*(fSumX*fSumYX2-fSumYX*fSumX2))/det;
+ c=
+ (n*(fSumX2*fSumYX2-fSumYX*fSumX3)-
+ fSumX*(fSumX*fSumYX2-fSumYX*fSumX2)+
+ fSumY*(fSumX*fSumX3-fSumX2*fSumX2))/det;
+ }
+}
+
+void AliTPCTempHitInfoV2::Fit(AliTrackHitsParamV2 * param)
+{
+ // fit fixing first and the last point
+ //result stored in new param
+ Double_t dx2 = (GetPosition(fStackIndex))[0]-fParam->fR;
+ Double_t det = fSumDr4+dx2*fSumDr2-2*dx2*fSumDr3;
+ if ( (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) &&
+ ((TMath::Abs(dx2)> AliTPCTrackHitsV2::fgkPrecision))){
+ Double_t dfi2 = (GetPosition(fStackIndex))[1]-fParam->fFi;
+ param->fAd = (fSumDFiDr2+dfi2*fSumDr-dx2*fSumDFiDr-dfi2*fSumDr3/dx2)/det;
+ param->fAn = (dfi2-param->fAd*dx2*dx2)/dx2;
+
+ Double_t dz2 = (GetPosition(fStackIndex))[1]-fParam->fZ;
+ param->fTheta = (fSumDZDr2+dz2*fSumDr-dx2*fSumDZDr-dz2*fSumDr3/dx2)/det;
+ param->fTheta = (dz2-param->fAd*dx2*dx2)/dx2;
+ }
+
+}
+
+AliTrackHitsParamV2::AliTrackHitsParamV2()
+{
+ //default constructor
+ fgCounter1++;
+ fgCounter2++;
+ fHitDistance=0;
+ fCharge=0;
+ fNHits=0;
+}
+AliTrackHitsParamV2::~AliTrackHitsParamV2()
+{
+ fgCounter1--;
+ if (fHitDistance) {
+ delete[]fHitDistance;
+ fHitDistance=0;
+ }
+ if (fCharge){
+ delete[]fCharge;
+ fCharge =0;
+ }
+}
+
+
+AliTPCTrackHitsV2::AliTPCTrackHitsV2()
+{
+ //
+ //default constructor
+ //
+ const Float_t kHitPrecision=0.002; //default precision for hit position in cm
+ const Float_t kStep =0.003; //30 mum step
+ const UShort_t kMaxDistance =100; //maximum distance 100
+
+ fPrecision=kHitPrecision; //precision in cm
+ fStep = kStep; //step size
+ fMaxDistance = kMaxDistance; //maximum distance
+ fTempInfo =0;
+ fSize=0;
+ //fTrackHitsInfo = new AliObjectArray("AliTrackHitsInfo");
+ //fTrackHitsParam = new AliObjectArray("AliTrackHitsParamV2");
+ //fHitsPosAndQ = new TArrayOfArrayVStack("AliHitInfo");
+ fArray = new TClonesArray("AliTrackHitsParamV2");
+ fCurrentHit = new AliTPCCurrentHitV2;
+ fVolumes =0;
+ fNVolumes =0;
+ fgCounter1++;
+ fgCounter2++;
+
+}
+
+AliTPCTrackHitsV2::~AliTPCTrackHitsV2()
+{
+ //
+ //default destructor
+ //
+ // if (fTrackHitsInfo) delete fTrackHitsInfo;
+ if (fArray) {
+ delete fArray;
+ fArray =0;
+ }
+ //if (fHitsPosAndQ) delete fHitsPosAndQ;
+ if (fCurrentHit) delete fCurrentHit;
+ if (fTempInfo) delete fTempInfo;
+ if (fVolumes) {
+ delete [] fVolumes;
+ fVolumes =0;
+ fNVolumes=0;
+ }
+ fgCounter1--;
+}
+
+void AliTPCTrackHitsV2::Clear()
+{
+ //
+ //clear object
+ if (fArray){
+ for (Int_t i=0;i<fArray->GetEntriesFast();i++){
+ AliTrackHitsParamV2 * par = (AliTrackHitsParamV2 *)fArray->UncheckedAt(i);
+ par->~AliTrackHitsParamV2(); // delete object
+ }
+ fArray->Clear();
+ }
+ if (fTempInfo){
+ delete fTempInfo;
+ fTempInfo =0;
+ }
+ if (fVolumes){
+ delete [] fVolumes;
+ fVolumes=0;
+ fNVolumes=0;
+ }
+}
+
+
+void AliTPCTrackHitsV2::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
+ Double_t y, Double_t z,Int_t q)
+{
+ //
+ //add hit to the container - it add hit at the end - input in global coordinata
+ Double_t r = TMath::Sqrt(x*x+y*y);
+ Double_t fi = TMath::ACos(x/r);
+ if (y<0) fi*=-1.;
+ AddHit(volumeID,trackID,r,z,fi,q);
+}
+
+
+void AliTPCTrackHitsV2::AddHit(Int_t volumeID, Int_t trackID,
+ Double_t r, Double_t z, Double_t fi, Int_t q)
+{
+ //
+ fSize++;
+ Bool_t diff=kFALSE;
+ if (!fTempInfo) { //initialisation of track - initialisation of parameters
+ fTempInfo = new AliTPCTempHitInfoV2;
+ fTempInfo->fParam = new((*fArray)[0]) AliTrackHitsParamV2;
+ fTempInfo->fParam->fVolumeID = volumeID;
+ fTempInfo->fParam->fTrackID = trackID;
+ AddVolume(volumeID);
+ //
+ fTempInfo->fParamIndex = 0;
+ fTempInfo->NewParam(r,z,fi,q);
+ return;
+ }
+
+ // if new volume or new trackID
+ if ( (volumeID!=fTempInfo->fParam->fVolumeID) ||
+ (trackID!=fTempInfo->fParam->fTrackID)){
+ if (volumeID!=fTempInfo->fParam->fVolumeID) AddVolume(volumeID);
+ diff=kTRUE;
+ FlushHitStack(kTRUE);
+
+ fTempInfo->fParamIndex++;
+ fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
+ fTempInfo->fParam->fVolumeID = volumeID;
+ fTempInfo->fParam->fTrackID = trackID;
+ fTempInfo->NewParam(r,z,fi,q);
+ return;
+ }
+
+ //calculate current fit precission to next point
+ AliTrackHitsParamV2 ¶m = *(fTempInfo->fParam);
+ Double_t dd=0;
+ Double_t dl=0;
+ Double_t ratio=0;
+ Double_t dr,dz,dfi,ddz,ddfi;
+ Double_t drhit,ddl;
+ dr=dz=dfi=ddz=ddfi=0;
+ drhit = r-fTempInfo->fOldR;
+ {
+ //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
+ Double_t dfi2 = param.fAn;
+ dfi2*=dfi2*fTempInfo->fOldR*fTempInfo->fOldR;
+ //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
+ Double_t ddz2 = param.fTheta;
+ ddz2*=ddz2;
+ ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
+ }
+ dl = fStep * Short_t(TMath::Nint(drhit*ratio/fStep));
+ ddl = dl - drhit*ratio;
+ fTempInfo->fOldR += dl/ratio;
+
+ if (fTempInfo->fStackIndex>2){
+ dr = r-param.fR;
+ dz = z-param.fZ;
+ dfi = fi-param.fFi;
+ ddz = dr*param.fTheta+dr*dr*param.fThetaD-dz;
+ ddfi= dr*param.fAn+dr*dr*param.fAd-dfi;
+ dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
+ //
+ }
+ //safety factor 1.25
+ if ( ( (dd*1.25>fPrecision) ) ||
+ (fTempInfo->fStackIndex+4>fTempInfo->fkStackSize) ||
+ (TMath::Abs(dl/fStep)>fMaxDistance) )
+ diff=kTRUE;
+ else{ // if precision OK
+ fTempInfo->fStackIndex++;
+ fTempInfo->SetHit(r,z,fi,q);
+ return;
+ }
+
+
+ //if parameter changed
+ if (FlushHitStack(kFALSE)){ //if full buffer flushed
+ fTempInfo->fParamIndex++;
+ fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
+ fTempInfo->fParam->fVolumeID = volumeID;
+ fTempInfo->fParam->fTrackID = trackID;
+ fTempInfo->NewParam(r,z,fi,q);
+ }
+ else{
+ fTempInfo->fStackIndex++;
+ fTempInfo->SetHit(r,z,fi,q);
+ }
+}
+
+Bool_t AliTPCTrackHitsV2::FlushHitStack(Bool_t force)
+{
+ //
+ //write fHitsPosAndQ information from the stack to te arrays
+ if (!fTempInfo) return kFALSE;
+
+ AliTrackHitsParamV2 & param = *(fTempInfo->fParam);
+ //recalculate track parameter not fixing first point
+ fTempInfo->UpdateParam(fStep/4.);
+ //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
+
+ Double_t oldr = param.fR;
+ UInt_t i;
+ Double_t dd;
+ param.fNHits = fTempInfo->fStackIndex+1;
+ if (param.fHitDistance) delete []param.fHitDistance;
+ if (param.fCharge) delete []param.fCharge;
+ param.fHitDistance = new Short_t[param.fNHits];
+ param.fCharge = new Short_t[param.fNHits];
+
+
+ for (i=0; i <= fTempInfo->fStackIndex; i++){
+ Double_t * position = fTempInfo->GetPosition(i);
+ Double_t dr = position[0]-oldr;
+ Double_t ratio;
+ {
+ //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
+ Double_t dfi2 = param.fAn;
+ dfi2*=dfi2*oldr*oldr;
+ //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
+ Double_t ddz2 = param.fTheta;
+ ddz2*=ddz2;
+ ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
+ }
+
+ Double_t dl = fStep*(Short_t)TMath::Nint(dr*ratio/fStep);
+ dr = dl/ratio;
+ oldr+=dr;
+ //calculate precission
+ AliTrackHitsParamV2 ¶m = *(fTempInfo->fParam);
+ //real deltas
+ Double_t dr1= position[0]-param.fR;
+ Double_t dz = position[1]-param.fZ;
+ Double_t dfi = position[2]-param.fFi;
+ //extrapolated deltas
+ Double_t dr2 = oldr-param.fR;
+ Double_t ddr = dr2-dr1;
+ Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
+ Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
+ dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
+
+
+ if ( (dd>fPrecision) ){
+ //if ( (dd<0) ){
+ if (i==0){
+ param.fAn = 0;
+ param.fAd = 0;
+ param.fTheta =0;
+ param.fThetaD =0;
+ Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
+ Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
+ dl = 0;
+ dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
+ }
+ else
+ break;
+ }
+
+ param.fHitDistance[i]= Short_t(TMath::Nint(dl/fStep));
+ param.fCharge[i]= Short_t(fTempInfo->fQStack[i]);
+ }
+
+ if (i<=fTempInfo->fStackIndex){ //if previous iteration not succesfull
+ Short_t * charge = new Short_t[i];
+ Short_t * hitDistance= new Short_t[i];
+ memcpy(charge, param.fCharge,sizeof(Short_t)*i);
+ memcpy(hitDistance, param.fHitDistance,sizeof(Short_t)*i);
+ delete [] param.fCharge;
+ delete [] param.fHitDistance;
+ param.fNHits= i;
+ param.fCharge = charge;
+ param.fHitDistance = hitDistance;
+ //
+ Int_t volumeID = fTempInfo->fParam->fVolumeID;
+ Int_t trackID =fTempInfo->fParam->fTrackID;
+ fTempInfo->fParamIndex++;
+ fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
+ Double_t * p = fTempInfo->GetPosition(i);
+ UInt_t index2 = fTempInfo->fStackIndex;
+ fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->fQStack[i]);
+ fTempInfo->fParam->fVolumeID= volumeID;
+ fTempInfo->fParam->fTrackID= trackID;
+ if (i+1<=index2) FlushHitStack2(i+1,index2);
+
+ if (force) return FlushHitStack(kTRUE);
+ return kFALSE;
+ }
+ return kTRUE;
+}
+
+
+void AliTPCTrackHitsV2::FlushHitStack2(Int_t index1, Int_t index2)
+{
+ //
+ // second iteration flush stack
+ // call only for hits where first iteration were not succesfully interpolated
+ Double_t * positionstack = new Double_t[3*(index2-index1+1)];
+ UInt_t * qstack = new UInt_t[index2-index1+1];
+ memcpy(positionstack, &fTempInfo->fPositionStack[3*index1],
+ (3*(index2-index1+1))*sizeof(Double_t));
+ memcpy(qstack, &fTempInfo->fQStack[index1],(index2-index1+1)*sizeof(UInt_t));
+ Double_t *p = positionstack;
+ for (Int_t j=0; j<=index2-index1;j++){
+ fTempInfo->fStackIndex++;
+ fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j]);
+ }
+ delete []positionstack;
+ delete []qstack;
+}
+
+
+void AliTPCTrackHitsV2::AddVolume(Int_t volume)
+{
+ //
+ //add volumes to tthe list of volumes
+ Int_t * volumes = new Int_t[fNVolumes+1];
+ if (fVolumes) memcpy(volumes,fVolumes,(fNVolumes+1)*sizeof(Int_t));
+ volumes[fNVolumes]=volume;
+ fNVolumes++;
+ if (fVolumes) delete []fVolumes;
+ fVolumes = volumes;
+}
+
+
+
+
+
+Bool_t AliTPCTrackHitsV2::First()
+{
+ //
+ //set Current hit for the first hit
+ //
+ AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(0);
+ if (!(param) ) {
+ fCurrentHit->fStatus = kFALSE;
+ return kFALSE;
+ }
+ //
+ fCurrentHit->fParamIndex = 0;
+ fCurrentHit->fStackIndex = 0;
+ //
+ fCurrentHit->fHit.fSector = param->fVolumeID;
+ fCurrentHit->fHit.SetTrack(param->fTrackID);
+ fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
+ fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
+ fCurrentHit->fHit.SetZ(param->fZ);
+ fCurrentHit->fHit.fQ = param->fCharge[0];
+ fCurrentHit->fR = param->fR;
+
+ return fCurrentHit->fStatus = kTRUE;
+}
+
+Bool_t AliTPCTrackHitsV2::Next()
+{
+ //
+ //
+ if (!(fCurrentHit->fStatus))
+ return kFALSE;
+
+ fCurrentHit->fStackIndex++;
+
+ AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
+ if (fCurrentHit->fStackIndex>=param->fNHits){
+ fCurrentHit->fParamIndex++;
+ if (fCurrentHit->fParamIndex>=fArray->GetEntriesFast()){
+ fCurrentHit->fStatus=kFALSE;
+ return kFALSE;
+ }
+ param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
+ fCurrentHit->fStackIndex=0;
+ fCurrentHit->fR = param->fR;
+ }
+
+
+
+ Double_t ratio;
+ {
+ // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
+ Double_t dfi2 = param->fAn;
+ dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
+ // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
+ Double_t ddz2 = param->fTheta;
+ ddz2*=ddz2;
+ ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
+ }
+
+ fCurrentHit->fR += fStep*param->fHitDistance[fCurrentHit->fStackIndex]/ratio;
+
+ Double_t dR = fCurrentHit->fR - param->fR;
+ Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
+ Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
+
+ fCurrentHit->fHit.fQ = param->fCharge[fCurrentHit->fStackIndex];
+ fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
+ fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
+ fCurrentHit->fHit.SetZ(z);
+ fCurrentHit->fHit.fSector = param->fVolumeID;
+ fCurrentHit->fHit.SetTrack(param->fTrackID);
+ return kTRUE;
+}
+
+AliTPChit * AliTPCTrackHitsV2::GetHit()
+{
+ //
+ return (fCurrentHit->fStatus)? &fCurrentHit->fHit:0;
+ //return &fCurrentHit->fHit;
+
+}
+
+AliTrackHitsParamV2 * AliTPCTrackHitsV2::GetParam()
+{
+ return (fCurrentHit->fStatus)? (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex):0;
+}
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff