// that is the base for AliTPCtrack, AliITStrackV2 and AliTRDtrack
// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-------------------------------------------------------------------------
-#include "AliTracker.h"
+#include <TGeoManager.h>
#include "AliKalmanTrack.h"
-#include "TGeoManager.h"
ClassImp(AliKalmanTrack)
//_______________________________________________________________________
-AliKalmanTrack::AliKalmanTrack():
+ AliKalmanTrack::AliKalmanTrack():AliExternalTrackParam(),
fLab(-3141593),
fFakeRatio(0),
fChi2(0),
fMass(AliPID::ParticleMass(AliPID::kPion)),
fN(0),
- fLocalConvConst(0),
fStartTimeIntegral(kFALSE),
fIntegratedLength(0)
{
//
// Default constructor
//
- if (AliTracker::GetFieldMap()==0) {
- AliError("The magnetic field has not been set!");
- }
for(Int_t i=0; i<AliPID::kSPECIES; i++) fIntegratedTime[i] = 0;
}
//_______________________________________________________________________
AliKalmanTrack::AliKalmanTrack(const AliKalmanTrack &t):
- TObject(t),
+ AliExternalTrackParam(t),
fLab(t.fLab),
fFakeRatio(t.fFakeRatio),
fChi2(t.fChi2),
fMass(t.fMass),
fN(t.fN),
- fLocalConvConst(t.fLocalConvConst),
fStartTimeIntegral(t.fStartTimeIntegral),
fIntegratedLength(t.fIntegratedLength)
{
//
// Copy constructor
//
- if (AliTracker::GetFieldMap()==0) {
- AliFatal("The magnetic field has not been set!");
- }
for (Int_t i=0; i<AliPID::kSPECIES; i++)
fIntegratedTime[i] = t.fIntegratedTime[i];
for (Int_t i=0; i<AliPID::kSPECIES; i++) fIntegratedTime[i]=times[i];
}
-void AliKalmanTrack::External2Helix(Double_t helix[6]) const {
- //--------------------------------------------------------------------
- // External track parameters -> helix parameters
- //--------------------------------------------------------------------
- Double_t alpha,x,cs,sn;
- GetExternalParameters(x,helix); alpha=GetAlpha();
-
- cs=TMath::Cos(alpha); sn=TMath::Sin(alpha);
- helix[5]=x*cs - helix[0]*sn; // x0
- helix[0]=x*sn + helix[0]*cs; // y0
-//helix[1]= // z0
- helix[2]=TMath::ASin(helix[2]) + alpha; // phi0
-//helix[3]= // tgl
- helix[4]=helix[4]/GetLocalConvConst(); // C
-}
-
Double_t AliKalmanTrack::MeanMaterialBudget(Double_t *start, Double_t *end, Double_t *mparam)
{
- //
+ //
// calculate mean material budget and material properties beween point start and end
// mparam - returns parameters used for dEdx and multiple scatering
//
- // mparam[0] - density mean
+ // mparam[0] - density mean
// mparam[1] - rad length
// mparam[2] - A mean
// mparam[3] - Z mean
// mparam[5] - Z/A mean
// mparam[6] - number of boundary crosses
//
- mparam[0]=0; mparam[1]=1; mparam[2] =0; mparam[3] =0, mparam[4]=0, mparam[5]=0; mparam[6]=0;
+ mparam[0]=0; mparam[1]=1; mparam[2] =0; mparam[3] =0, mparam[4]=0, mparam[5]=0; mparam[6]=0;
//
Double_t bparam[6], lparam[6]; // bparam - total param - lparam - local parameters
- for (Int_t i=0;i<6;i++) bparam[i]=0; //
+ for (Int_t i=0;i<6;i++) bparam[i]=0; //
if (!gGeoManager) {
printf("ERROR: no TGeo\n");
Double_t length;
Double_t dir[3];
length = TMath::Sqrt((end[0]-start[0])*(end[0]-start[0])+
- (end[1]-start[1])*(end[1]-start[1])+
- (end[2]-start[2])*(end[2]-start[2]));
+ (end[1]-start[1])*(end[1]-start[1])+
+ (end[2]-start[2])*(end[2]-start[2]));
mparam[4]=length;
if (length<TGeoShape::Tolerance()) return 0.0;
Double_t invlen = 1./length;
lparam[1] = material->GetRadLen();
lparam[2] = material->GetA();
lparam[3] = material->GetZ();
- lparam[4] = length;
+ lparam[4] = length;
lparam[5] = lparam[3]/lparam[2];
if (material->IsMixture()) {
lparam[1]*=lparam[0]; // different normalization in the modeler for mixture
Double_t step = 0.0;
// If no boundary within proposed length, return current density
if (snext>=length) {
- for (Int_t ip=0;ip<5;ip++) mparam[ip] = lparam[ip];
+ for (Int_t ip=0;ip<5;ip++) mparam[ip] = lparam[ip];
return lparam[0];
}
// Try to cross the boundary and see what is next
bparam[1] += snext*lparam[1];
bparam[2] += snext*lparam[2];
bparam[3] += snext*lparam[3];
- bparam[5] += snext*lparam[5];
+ bparam[5] += snext*lparam[5];
bparam[0] += snext*lparam[0];
if (snext>=length) break;
gGeoManager->SetStep(1.E-3);
currentnode = gGeoManager->Step();
if (!gGeoManager->IsEntering() || !currentnode) {
- // printf("ERROR: cannot cross boundary\n");
- mparam[0] = bparam[0]/step;
- mparam[1] = bparam[1]/step;
- mparam[2] = bparam[2]/step;
- mparam[3] = bparam[3]/step;
- mparam[5] = bparam[5]/step;
- mparam[4] = step;
- mparam[0] = 0.; // if crash of navigation take mean density 0
- mparam[1] = 1000000; // and infinite rad length
+ // printf("ERROR: cannot cross boundary\n");
+ mparam[0] = bparam[0]/step;
+ mparam[1] = bparam[1]/step;
+ mparam[2] = bparam[2]/step;
+ mparam[3] = bparam[3]/step;
+ mparam[5] = bparam[5]/step;
+ mparam[4] = step;
+ mparam[0] = 0.; // if crash of navigation take mean density 0
+ mparam[1] = 1000000; // and infinite rad length
return bparam[0]/step;
}
step += 1.E-3;
if (material->IsMixture()) {
lparam[1]*=lparam[0];
TGeoMixture * mixture = (TGeoMixture*)material;
- lparam[5]=0;
+ lparam[5]=0;
Double_t sum =0;
for (Int_t iel=0;iel<mixture->GetNelements();iel++){
- sum+= mixture->GetWmixt()[iel];
- lparam[5]+= mixture->GetZmixt()[iel]*mixture->GetWmixt()[iel]/mixture->GetAmixt()[iel];
+ sum+= mixture->GetWmixt()[iel];
+ lparam[5]+= mixture->GetZmixt()[iel]*mixture->GetWmixt()[iel]/mixture->GetAmixt()[iel];
}
lparam[5]/=sum;
}
gGeoManager->FindNextBoundary(length);
snext = gGeoManager->GetStep();
- }
+ }
mparam[0] = bparam[0]/step;
mparam[1] = bparam[1]/step;
mparam[2] = bparam[2]/step;
- mparam[3] = bparam[3]/step;
- mparam[5] = bparam[5]/step;
- return bparam[0]/step;
-
-}
+ mparam[3] = bparam[3]/step;
+ mparam[5] = bparam[5]/step;
+ return bparam[0]/step;
-Double_t AliKalmanTrack::GetConvConst() {
- return 1000/0.299792458/AliTracker::GetBz();
}
-void AliKalmanTrack::SaveLocalConvConst() {
- //---------------------------------------------------------------------
- // Saves local conversion constant "curvature (1/cm) -> pt (GeV/c)"
- //---------------------------------------------------------------------
- if (AliTracker::UniformField()) {
- fLocalConvConst=1000/0.299792458/AliTracker::GetBz();
- } else {
- Float_t r[3]; GetXYZ(r);
- fLocalConvConst=1000/0.299792458/AliTracker::GetBz(r);
- }
-}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff