// 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():
- fLab(-3141593),
+ AliKalmanTrack::AliKalmanTrack():AliExternalTrackParam(),
fFakeRatio(0),
fChi2(0),
fMass(AliPID::ParticleMass(AliPID::kPion)),
+ fLab(-3141593),
fN(0),
- fLocalConvConst(0),
fStartTimeIntegral(kFALSE),
fIntegratedLength(0)
{
//
// Default constructor
//
- if (AliTracker::GetFieldMap()==0) {
- AliFatal("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),
- fLab(t.fLab),
+ AliExternalTrackParam(t),
fFakeRatio(t.fFakeRatio),
fChi2(t.fChi2),
fMass(t.fMass),
+ fLab(t.fLab),
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];
}
+AliKalmanTrack& AliKalmanTrack::operator=(const AliKalmanTrack&o){
+ if(this!=&o){
+ AliExternalTrackParam::operator=(o);
+ fLab = o.fLab;
+ fFakeRatio = o.fFakeRatio;
+ fChi2 = o.fChi2;
+ fMass = o.fMass;
+ fN = o.fN;
+ fStartTimeIntegral = o.fStartTimeIntegral;
+ for(Int_t i = 0;i<AliPID::kSPECIES;++i)fIntegratedTime[i] = o.fIntegratedTime[i];
+ fIntegratedLength = o.fIntegratedLength;
+ }
+ return *this;
+}
+
//_______________________________________________________________________
void AliKalmanTrack::StartTimeIntegral()
{
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[1] - rad length
- // mparam[2] - A mean
- // mparam[3] - Z mean
- // mparam[4] - length
- // 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;
- //
- Double_t bparam[6], lparam[6]; // bparam - total param - lparam - local parameters
- for (Int_t i=0;i<6;i++) bparam[i]=0; //
-
- if (!gGeoManager) {
- printf("ERROR: no TGeo\n");
- return 0.;
- }
- //
- 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]));
- mparam[4]=length;
- if (length<TGeoShape::Tolerance()) return 0.0;
- Double_t invlen = 1./length;
- dir[0] = (end[0]-start[0])*invlen;
- dir[1] = (end[1]-start[1])*invlen;
- dir[2] = (end[2]-start[2])*invlen;
- // Initialize start point and direction
- TGeoNode *currentnode = 0;
- TGeoNode *startnode = gGeoManager->InitTrack(start, dir);
- // printf("%s length=%f\n",gGeoManager->GetPath(),length);
- if (!startnode) {
- printf("ERROR: start point out of geometry\n");
- return 0.0;
- }
- TGeoMaterial *material = startnode->GetVolume()->GetMedium()->GetMaterial();
- lparam[0] = material->GetDensity();
- lparam[1] = material->GetRadLen();
- lparam[2] = material->GetA();
- lparam[3] = material->GetZ();
- lparam[4] = length;
- lparam[5] = lparam[3]/lparam[2];
- if (material->IsMixture()) {
- lparam[1]*=lparam[0]; // different normalization in the modeler for mixture
- TGeoMixture * mixture = (TGeoMixture*)material;
- 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];
- }
- lparam[5]/=sum;
- }
- gGeoManager->FindNextBoundary(length);
- Double_t snext = gGeoManager->GetStep();
- 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];
- return lparam[0];
- }
- // Try to cross the boundary and see what is next
- while (length>TGeoShape::Tolerance()) {
- mparam[6]+=1.;
- currentnode = gGeoManager->Step();
- step += snext+1.E-6;
- bparam[1] += snext*lparam[1];
- bparam[2] += snext*lparam[2];
- bparam[3] += snext*lparam[3];
- bparam[5] += snext*lparam[5];
- bparam[0] += snext*lparam[0];
-
- if (snext>=length) break;
- if (!currentnode) break;
- // printf("%s snext=%f density=%f bparam[0]=%f\n", gGeoManager->GetPath(),snext,density,bparam[0]);
- if (!gGeoManager->IsEntering()) {
- 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
- return bparam[0]/step;
- }
- step += 1.E-3;
- snext += 1.E-3;
- bparam[0] += lparam[0]*1.E-3;
- bparam[1] += lparam[1]*1.E-3;
- bparam[2] += lparam[2]*1.E-3;
- bparam[3] += lparam[3]*1.E-3;
- bparam[5] += lparam[5]*1.E-3;
- }
- length -= snext;
- material = currentnode->GetVolume()->GetMedium()->GetMaterial();
- lparam[0] = material->GetDensity();
- lparam[1] = material->GetRadLen();
- lparam[2] = material->GetA();
- lparam[3] = material->GetZ();
- lparam[5] = lparam[3]/lparam[2];
- if (material->IsMixture()) {
- lparam[1]*=lparam[0];
- TGeoMixture * mixture = (TGeoMixture*)material;
- 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];
- }
- 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;
-
-}
-
-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