[u/mrichter/AliRoot.git] / HBTAN / AliHBTTrackPoints.cxx

#include "AliHBTTrackPoints.h"
//_________________________________
////////////////////////////////////////////////////////////
//                                                        //
// class AliHBTTrackPoints                                //
//                                                        //
// used by Anti-Merging cut                               //
// contains set of poits the lay on track trajectory      //
// according to reconstructed track parameters -          //
// NOT CLUSTERS POSITIONS!!!                              //
// Anti-Merging cut is applied only on tracks coming from //
// different events (that are use to fill deniminators)   //
//                                                        //
////////////////////////////////////////////////////////////
#include "AliTrackReference.h"

#include "AliTPCtrack.h"
#include "AliESDtrack.h"

#include <TMath.h>
#include <TClonesArray.h>

ClassImp(AliHBTTrackPoints)

Int_t AliHBTTrackPoints::fgDebug = 0;
AliHBTTrackPoints::AliHBTTrackPoints():
 fN(0),
 fX(0x0),
 fY(0x0),
 fZ(0x0)
{
  //constructor
}
/***************************************************************/

AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliESDtrack* track, Float_t mf, Float_t dr, Float_t r0):
 fN(n),
 fX(new Float_t[fN]),
 fY(new Float_t[fN]),
 fZ(new Float_t[fN])
{
  //constructor
  //mf - magnetic field in kG - needed to calculated curvature out of Pt
  //r0 - starting radius
  //dr - calculate points every dr cm, default every 30cm
  if (track == 0x0)
   {
     Error("AliHBTTrackPoints","ESD track is null");
     fN = 0;
     delete [] fX;
     delete [] fY;
     delete [] fZ;
     fX = fY = fZ = 0x0;
     return;
   }

  Double_t x;
  Double_t par[5];
  track->GetInnerExternalParameters(x,par);     //get properties of the track
  if (x == 0)
   {
     Error("AliHBTTrackPoints","This ESD track does not contain TPC information");
     return;
   }

  if (mf == 0.0)
   {
     Error("AliHBTTrackPoints","Zero Magnetic field passed as parameter.");
     return;
   }
   
  Double_t alpha = track->GetInnerAlpha();
  Double_t cc = 1000./0.299792458/mf;//conversion constant
  Double_t c=par[4]/cc;
  
  MakePoints(dr,r0,x,par,c,alpha);
  
}
/***************************************************************/

AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliTPCtrack* track, Float_t dr, Float_t r0):
 fN(n),
 fX(new Float_t[fN]),
 fY(new Float_t[fN]),
 fZ(new Float_t[fN])
{
  //constructor
  //r0 starting radius
  //dr - calculate points every dr cm, default every 30cm
  if (track == 0x0)
   {
     Error("AliHBTTrackPoints","TPC track is null");
     fN = 0;
     delete [] fX;
     delete [] fY;
     delete [] fZ;
     fX = fY = fZ = 0x0;
     return;
   }
  track->PropagateTo(r0);

 //* This formation is now fixed in the following way:                         *
 //*      external param0:   local Y-coordinate of a track (cm)                *
 //*      external param1:   local Z-coordinate of a track (cm)                *
 //*      external param2:   local sine of the track momentum azimuth angle    *
 //*      external param3:   tangent of the track momentum dip angle           *
 //*      external param4:   1/pt (1/(GeV/c))                                  *
    
  Double_t x = 0;
  Double_t par[5];
  track->GetExternalParameters(x,par);     //get properties of the track
  
  Double_t alpha = track->GetAlpha();
  Double_t c=track->GetC();
  MakePoints(dr,r0,x,par,c,alpha);
}  

void AliHBTTrackPoints::MakePoints( Float_t dr, Float_t r0, Double_t x, Double_t* par, Double_t c, Double_t alpha)
{
  //Calculates points starting at radius r0
  //spacing every dr (in radial direction)
  // according to track parameters
  // x - position in sector local reference frame. x i parallel to R and sector is symmetric with respect to x
  // par - track external parameters; array with 5 elements;  look at AliTPCtrack.h or AliESDtrack.h for their meaning
  // c - track curvature
  // alpha - sector's rotation angle (phi) == angle needed for local to global transformation
  
  Double_t y = par[0];
  Double_t z0 = par[1];
      
  Double_t phi0local = TMath::ATan2(y,x);
  Double_t phi0global = phi0local + alpha;
  
  if (phi0local<0) phi0local+=2*TMath::Pi();
  if (phi0local>=2.*TMath::Pi()) phi0local-=2*TMath::Pi();
  
  if (phi0global<0) phi0global+=2*TMath::Pi();
  if (phi0global>=2.*TMath::Pi()) phi0global-=2*TMath::Pi();
  
  Double_t r = TMath::Hypot(x,y);
  

  if (GetDebug() > 9) 
    Info("AliHBTTrackPoints","Radius0 %f, Real Radius %f",r0,r); 
  
  if (GetDebug() > 5) 
    Info("AliHBTTrackPoints","Phi Global at first padraw %f, Phi locat %f",phi0global,phi0local);
    
  Double_t eta = x*c - par[2] ;//par[2] = fX*C - eta; eta==fP2 ; C==fP4
  
  //this calculattions are assuming new (current) model 
  Double_t tmp = par[2];
  tmp = 1. - tmp*tmp;
  tmp = c*y + TMath::Sqrt(tmp);
  Double_t dca=(TMath::Hypot(eta,tmp) - 1. )/TMath::Abs(c);

  //Here is old model Cold=Cnew/2.
  Double_t dcasq = dca*dca;
  Double_t c2 = c/2.;
  Double_t cst1 = (1.+c2*dca)*dca;//first constant
  Double_t cst2 = 1. + 2.*c2*dca;//second constant
      
  Double_t factorPhi0 = TMath::ASin((c2*r + cst1/r)/cst2);
  Double_t factorZ0 = TMath::ASin(c2*TMath::Sqrt((r*r-dcasq)/cst2))*par[3]/c2;
 
  for(Int_t i = 0; i<fN; i++)
   {
     Double_t rc = r0 + i*dr;
     Double_t factorPhi = TMath::ASin( (c2*rc + cst1/rc)/cst2 );//factor phi od rc
     Double_t phi = phi0global + factorPhi - factorPhi0;
     
     Double_t factorZ = TMath::ASin(c2*TMath::Sqrt((rc*rc-dcasq)/cst2))*par[3]/c2;
     fZ[i] = z0 + factorZ - factorZ0;
     fX[i] = rc*TMath::Cos(phi);
     fY[i] = rc*TMath::Sin(phi);
     
     if ( GetDebug() > 2 )
      {
        Info("AliHBTTrackPoints","X %f Y %f Z %f R asked %f R obtained %f",
             fX[i],fY[i],fZ[i],rc,TMath::Hypot(fX[i],fY[i]));
      }
   }
}
/***************************************************************/

AliHBTTrackPoints::~AliHBTTrackPoints()
{
  //destructor
  delete [] fX;
  delete [] fY;
  delete [] fZ;
}
/***************************************************************/

void AliHBTTrackPoints::PositionAt(Int_t n, Float_t &x,Float_t &y,Float_t &z)
{
  //returns position at point n
  if ((n<0) || (n>fN))
   {
     Error("PositionAt","Point %d out of range",n);
     return;
   }
  
  x = fX[n];
  y = fY[n];
  z = fZ[n];
  if ( GetDebug() > 1 )
    {
      Info("AliHBTTrackPoints","n %d; X %f; Y %f; Z %f",n,x,y,z);
    }
}
/***************************************************************/

Double_t AliHBTTrackPoints::AvarageDistance(const AliHBTTrackPoints& tr)
{
  //returns the aritmethic avarage distance between two tracks
  if (fN != tr.fN)
   {
     Error("AvarageDistance","Number of points is not equal");
     return -1;
   }
  if ( (fN <= 0) || (tr.fN <=0) )
   {
     Error("AvarageDistance","One of tracks is empty");
     return -1;
   }
   
  Double_t sum = 0;
  for (Int_t i = 0; i<fN; i++)
   {
     if (GetDebug()>9)
      {
//       Float_t r1sq = fX[i]*fX[i]+fY[i]*fY[i];
//       Float_t r2sq = tr.fX[i]*tr.fX[i]+tr.fY[i]*tr.fY[i];
       Float_t r1sq = TMath::Hypot(fX[i],fY[i]);
       Float_t r2sq = TMath::Hypot(tr.fX[i],tr.fY[i]);
       Info("AvarageDistance","radii: %f %f",r1sq,r2sq);
      } 

      
     Double_t dx = fX[i]-tr.fX[i];
     Double_t dy = fY[i]-tr.fY[i];
     Double_t dz = fZ[i]-tr.fZ[i];
     sum+=TMath::Sqrt(dx*dx + dy*dy + dz*dz);
     
     if (GetDebug()>0)
      {
       Info("AvarageDistance","Diff: x ,y z: %f , %f, %f",dx,dy,dz);
       Info("AvarageDistance","xxyyzz %f %f %f %f %f %f",
            fX[i],tr.fX[i],fY[i],tr.fY[i],fZ[i],tr.fZ[i]);
      } 
   }
   
  Double_t retval = sum/((Double_t)fN);
  if ( GetDebug() )
    {
      Info("AvarageDistance","Avarage distance is %f.",retval);
    }
  return retval;
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
/***************************************************************/
/***************************************************************/
/***************************************************************/

#include "AliRun.h"
#include "AliESD.h"
#include "AliRunLoader.h"
#include "AliTPCtrack.h"
#include "TTree.h"
#include "TBranch.h"
#include "TH2D.h"
#include "TCanvas.h"
#include "AliMagF.h"


void AliHBTTrackPoints::testesd(Int_t entr,const char* fname )
{
  delete gAlice;
  gAlice = 0x0;
  AliRunLoader* rl = AliRunLoader::Open();
  rl->LoadgAlice();
  
  Float_t mf = rl->GetAliRun()->Field()->SolenoidField();
 
  
  TFile* fFile = TFile::Open(fname);
  
  if (fFile == 0x0)
   {
     printf("testesd: There is no suche a ESD file\n");
     return;
   }
  AliESD* esd = dynamic_cast<AliESD*>(fFile->Get("0"));
  AliESDtrack *t = esd->GetTrack(entr);
  if (t == 0x0)
   {
     ::Error("testesd","Can not get track %d",entr);
     return;
   }

  
  Int_t N = 170;
  AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,mf,1.);
  
  Float_t xmin = -250;
  Float_t xmax =  250;
  
  Float_t ymin = -250;
  Float_t ymax =  250;

  Float_t zmin = -250;
  Float_t zmax =  250;
  
  TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
  TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
  TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);

  TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
  TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
  TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);

  hxyt->SetDirectory(0x0);   
  hxy->SetDirectory(0x0);   
  hxyTR->SetDirectory(0x0);   
  
  hxzt->SetDirectory(0x0);   
  hxz->SetDirectory(0x0);   
  hxzTR->SetDirectory(0x0);   

  Float_t x,y,z;
   
  for (Int_t i = 0;i<N;i++)
   {  
      Double_t r = 84.1+i;
      tp->PositionAt(i,x,y,z);
      hxy->Fill(x,y);
      hxz->Fill(x,z);
      printf("Rdemanded %f\n",r);
      printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
      
   }

  rl->LoadTrackRefs();
  TTree* treeTR = rl->TreeTR();
  TBranch* b = treeTR->GetBranch("TPC");
  
  TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
  AliTrackReference* tref;
  b->SetAddress(&trackrefs);
  
  Int_t tlab = TMath::Abs(t->GetLabel());

  Int_t netr = (Int_t)treeTR->GetEntries();
  printf("Found %d entries in TR tree\n",netr);
  
  for (Int_t e = 0; e < netr; e++)
   { 
     treeTR->GetEntry(e);
     tref = (AliTrackReference*)trackrefs->At(0);
     if (tref == 0x0) continue;
     if (tref->GetTrack() != tlab) continue;
    
     printf("Found %d entries in TR array\n",trackrefs->GetEntries());
     
     for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
      {
        tref = (AliTrackReference*)trackrefs->At(i);
        if (tref->GetTrack() != tlab) continue;
        x = tref->X();
        y = tref->Y();
        z = tref->Z();
        printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());

        hxzTR->Fill(x,z);
        hxyTR->Fill(x,y);
        for (Int_t j = 1; j < 10; j++)
         {
            hxyTR->Fill(x, y+j*0.1);
            hxyTR->Fill(x, y-j*0.1);
            hxyTR->Fill(x+j*0.1,y);
            hxyTR->Fill(x-j*0.1,y);

            hxzTR->Fill(x,z-j*0.1);
            hxzTR->Fill(x,z+j*0.1);
            hxzTR->Fill(x-j*0.1,z);
            hxzTR->Fill(x+j*0.1,z);
         }
      }
      break; 
    }  
  hxy->Draw("");
//  hxzt->Draw("same");
  hxyTR->Draw("same");
  
  delete rl;
}

/***************************************************************/
/***************************************************************/
/***************************************************************/

void AliHBTTrackPoints::testtpc(Int_t entr)
{
  delete gAlice;
  gAlice = 0x0;
  AliRunLoader* rl = AliRunLoader::Open();
  AliLoader* l = rl->GetLoader("TPCLoader");
  rl->LoadgAlice();
  AliKalmanTrack::SetConvConst(100/0.299792458/0.2/rl->GetAliRun()->Field()->Factor());
  l->LoadTracks();
  AliTPCtrack* t = new AliTPCtrack();
  TBranch* b=l->TreeT()->GetBranch("tracks");
  b->SetAddress(&t);
  l->TreeT()->GetEntry(entr);  
  Int_t N = 160;
  AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,1.);
  
  Float_t xmin = -250;
  Float_t xmax =  250;
  
  Float_t ymin = -250;
  Float_t ymax =  250;

  Float_t zmin = -250;
  Float_t zmax =  250;
  
  TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
  TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
  TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);

  TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
  TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
  TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);

  hxyt->SetDirectory(0x0);   
  hxy->SetDirectory(0x0);   
  hxyTR->SetDirectory(0x0);   
  
  hxzt->SetDirectory(0x0);   
  hxz->SetDirectory(0x0);   
  hxzTR->SetDirectory(0x0);   

  Float_t x,y,z;
   
  for (Int_t i = 0;i<N;i++)
   {  
      Double_t r = 84.1+i;
      tp->PositionAt(i,x,y,z);
      hxy->Fill(x,y);
      hxz->Fill(x,z);
      printf("Rdemanded %f\n",r);
      printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
      
      //BUT they are local!!!!
      t->PropagateTo(r);
//      Double_t phi = t->Phi();
      Double_t rl = TMath::Hypot(t->GetX(),t->GetY());//real radius 
      
      Double_t alpha = t->GetAlpha();
      Double_t salpha = TMath::Sin(alpha);
      Double_t calpha = TMath::Cos(alpha);
      x = t->GetX()*calpha - t->GetY()*salpha;
      y = t->GetX()*salpha + t->GetY()*calpha;
      z = t->GetZ();
      
      printf("tx %f ty %f tz %f Rt = %f R from XY %f\n",x,y,z,TMath::Hypot(x,y),rl);
      
      printf("tpz - tz %f\n",z-t->GetZ());
      printf("\n");
      hxyt->Fill(x,y);
      hxzt->Fill(x,z);
      
   }

  rl->LoadTrackRefs();
  TTree* treeTR = rl->TreeTR();
  b = treeTR->GetBranch("TPC");
  
  TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
  AliTrackReference* tref;
  b->SetAddress(&trackrefs);
  
  Int_t tlab = TMath::Abs(t->GetLabel());

  Int_t netr = (Int_t)treeTR->GetEntries();
  printf("Found %d entries in TR tree\n",netr);
  
  for (Int_t e = 0; e < netr; e++)
   { 
     treeTR->GetEntry(e);
     tref = (AliTrackReference*)trackrefs->At(0);
     if (tref == 0x0) continue;
     if (tref->GetTrack() != tlab) continue;
    
     printf("Found %d entries in TR array\n",trackrefs->GetEntries());
     
     for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
      {
        tref = (AliTrackReference*)trackrefs->At(i);
        if (tref->GetTrack() != tlab) continue;
        x = tref->X();
        y = tref->Y();
        z = tref->Z();
        printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());

        hxzTR->Fill(x,z);
        hxyTR->Fill(x,y);
        for (Int_t j = 1; j < 10; j++)
         {
            hxyTR->Fill(x, y+j*0.1);
            hxyTR->Fill(x, y-j*0.1);
            hxyTR->Fill(x+j*0.1,y);
            hxyTR->Fill(x-j*0.1,y);

            hxzTR->Fill(x,z-j*0.1);
            hxzTR->Fill(x,z+j*0.1);
            hxzTR->Fill(x-j*0.1,z);
            hxzTR->Fill(x+j*0.1,z);
         }
      }
      break; 
    }  
  hxz->Draw("");
//  hxzt->Draw("same");
  hxzTR->Draw("same");
  
  delete rl;
}
Commit	Line	Data
f5de2f09	1	#include "AliHBTTrackPoints.h"
9616170a	2	//_________________________________
	3	////////////////////////////////////////////////////////////
	4	// //
	5	// class AliHBTTrackPoints //
	6	// //
	7	// used by Anti-Merging cut //
	8	// contains set of poits the lay on track trajectory //
	9	// according to reconstructed track parameters - //
	10	// NOT CLUSTERS POSITIONS!!! //
	11	// Anti-Merging cut is applied only on tracks coming from //
	12	// different events (that are use to fill deniminators) //
	13	// //
	14	////////////////////////////////////////////////////////////
81877d10	15	#include "AliTrackReference.h"
81877d10	16
f5de2f09	17	#include "AliTPCtrack.h"
81877d10	18	#include "AliESDtrack.h"
81877d10	19
f5de2f09	20	#include <TMath.h>
f5de2f09	21	#include <TClonesArray.h>
	22
	23	ClassImp(AliHBTTrackPoints)
	24
9616170a	25	Int_t AliHBTTrackPoints::fgDebug = 0;
f5de2f09	26	AliHBTTrackPoints::AliHBTTrackPoints():
	27	fN(0),
	28	fX(0x0),
	29	fY(0x0),
	30	fZ(0x0)
	31	{
	32	//constructor
	33	}
81877d10	34	/***************************************************************/
	35
	36	AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliESDtrack* track, Float_t mf, Float_t dr, Float_t r0):
	37	fN(n),
	38	fX(new Float_t[fN]),
	39	fY(new Float_t[fN]),
	40	fZ(new Float_t[fN])
	41	{
	42	//constructor
	43	//mf - magnetic field in kG - needed to calculated curvature out of Pt
	44	//r0 - starting radius
	45	//dr - calculate points every dr cm, default every 30cm
	46	if (track == 0x0)
	47	{
	48	Error("AliHBTTrackPoints","ESD track is null");
	49	fN = 0;
	50	delete [] fX;
	51	delete [] fY;
	52	delete [] fZ;
	53	fX = fY = fZ = 0x0;
	54	return;
	55	}
88378f71	56
	57	Double_t x;
	58	Double_t par[5];
	59	track->GetInnerExternalParameters(x,par); //get properties of the track
	60	if (x == 0)
84755ec0	61	{
88378f71	62	Error("AliHBTTrackPoints","This ESD track does not contain TPC information");
	63	return;
	64	}
	65
	66	if (mf == 0.0)
	67	{
	68	Error("AliHBTTrackPoints","Zero Magnetic field passed as parameter.");
	69	return;
84755ec0	70	}
81877d10	71
88378f71	72	Double_t alpha = track->GetInnerAlpha();
	73	Double_t cc = 1000./0.299792458/mf;//conversion constant
	74	Double_t c=par[4]/cc;
	75
	76	MakePoints(dr,r0,x,par,c,alpha);
81877d10	77
81877d10	78	}
9616170a	79	/***************************************************************/
f5de2f09	80
	81	AliHBTTrackPoints::AliHBTTrackPoints(Int_t n, AliTPCtrack* track, Float_t dr, Float_t r0):
	82	fN(n),
	83	fX(new Float_t[fN]),
	84	fY(new Float_t[fN]),
	85	fZ(new Float_t[fN])
	86	{
	87	//constructor
	88	//r0 starting radius
	89	//dr - calculate points every dr cm, default every 30cm
	90	if (track == 0x0)
	91	{
	92	Error("AliHBTTrackPoints","TPC track is null");
	93	fN = 0;
	94	delete [] fX;
	95	delete [] fY;
	96	delete [] fZ;
	97	fX = fY = fZ = 0x0;
	98	return;
	99	}
	100	track->PropagateTo(r0);
	101
	102	//* This formation is now fixed in the following way: *
	103	//* external param0: local Y-coordinate of a track (cm) *
	104	//* external param1: local Z-coordinate of a track (cm) *
	105	//* external param2: local sine of the track momentum azimuth angle *
	106	//* external param3: tangent of the track momentum dip angle *
	107	//* external param4: 1/pt (1/(GeV/c)) *
	108
81877d10	109	Double_t x = 0;
f5de2f09	110	Double_t par[5];
81877d10	111	track->GetExternalParameters(x,par); //get properties of the track
	112
	113	Double_t alpha = track->GetAlpha();
	114	Double_t c=track->GetC();
	115	MakePoints(dr,r0,x,par,c,alpha);
	116	}
	117
	118	void AliHBTTrackPoints::MakePoints( Float_t dr, Float_t r0, Double_t x, Double_t* par, Double_t c, Double_t alpha)
	119	{
	120	//Calculates points starting at radius r0
	121	//spacing every dr (in radial direction)
	122	// according to track parameters
	123	// x - position in sector local reference frame. x i parallel to R and sector is symmetric with respect to x
	124	// par - track external parameters; array with 5 elements; look at AliTPCtrack.h or AliESDtrack.h for their meaning
	125	// c - track curvature
	126	// alpha - sector's rotation angle (phi) == angle needed for local to global transformation
f5de2f09	127
81877d10	128	Double_t y = par[0];
81877d10	129	Double_t z0 = par[1];
f5de2f09	130
f5de2f09	131	Double_t phi0local = TMath::ATan2(y,x);
81877d10	132	Double_t phi0global = phi0local + alpha;
f5de2f09	133
	134	if (phi0local<0) phi0local+=2*TMath::Pi();
	135	if (phi0local>=2.TMath::Pi()) phi0local-=2TMath::Pi();
	136
	137	if (phi0global<0) phi0global+=2*TMath::Pi();
	138	if (phi0global>=2.TMath::Pi()) phi0global-=2TMath::Pi();
	139
	140	Double_t r = TMath::Hypot(x,y);
	141
	142
9616170a	143	if (GetDebug() > 9)
f5de2f09	144	Info("AliHBTTrackPoints","Radius0 %f, Real Radius %f",r0,r);
f5de2f09	145
9616170a	146	if (GetDebug() > 5)
f5de2f09	147	Info("AliHBTTrackPoints","Phi Global at first padraw %f, Phi locat %f",phi0global,phi0local);
81877d10	148
81877d10	149	Double_t eta = xc - par[2] ;//par[2] = fXC - eta; eta==fP2 ; C==fP4
f5de2f09	150
f5de2f09	151	//this calculattions are assuming new (current) model
81877d10	152	Double_t tmp = par[2];
f5de2f09	153	tmp = 1. - tmp*tmp;
	154	tmp = c*y + TMath::Sqrt(tmp);
	155	Double_t dca=(TMath::Hypot(eta,tmp) - 1. )/TMath::Abs(c);
	156
	157	//Here is old model Cold=Cnew/2.
	158	Double_t dcasq = dca*dca;
	159	Double_t c2 = c/2.;
	160	Double_t cst1 = (1.+c2dca)dca;//first constant
	161	Double_t cst2 = 1. + 2.c2dca;//second constant
	162
	163	Double_t factorPhi0 = TMath::ASin((c2*r + cst1/r)/cst2);
	164	Double_t factorZ0 = TMath::ASin(c2TMath::Sqrt((rr-dcasq)/cst2))*par[3]/c2;
	165
	166	for(Int_t i = 0; i<fN; i++)
	167	{
	168	Double_t rc = r0 + i*dr;
	169	Double_t factorPhi = TMath::ASin( (c2*rc + cst1/rc)/cst2 );//factor phi od rc
	170	Double_t phi = phi0global + factorPhi - factorPhi0;
	171
	172	Double_t factorZ = TMath::ASin(c2TMath::Sqrt((rcrc-dcasq)/cst2))*par[3]/c2;
	173	fZ[i] = z0 + factorZ - factorZ0;
	174	fX[i] = rc*TMath::Cos(phi);
	175	fY[i] = rc*TMath::Sin(phi);
	176
9616170a	177	if ( GetDebug() > 2 )
f5de2f09	178	{
	179	Info("AliHBTTrackPoints","X %f Y %f Z %f R asked %f R obtained %f",
	180	fX[i],fY[i],fZ[i],rc,TMath::Hypot(fX[i],fY[i]));
	181	}
	182	}
	183	}
9616170a	184	/***************************************************************/
f5de2f09	185
	186	AliHBTTrackPoints::~AliHBTTrackPoints()
	187	{
	188	//destructor
	189	delete [] fX;
	190	delete [] fY;
	191	delete [] fZ;
	192	}
9616170a	193	/***************************************************************/
f5de2f09	194
	195	void AliHBTTrackPoints::PositionAt(Int_t n, Float_t &x,Float_t &y,Float_t &z)
	196	{
	197	//returns position at point n
	198	if ((n<0) \|\| (n>fN))
	199	{
	200	Error("PositionAt","Point %d out of range",n);
	201	return;
	202	}
	203
	204	x = fX[n];
	205	y = fY[n];
	206	z = fZ[n];
9616170a	207	if ( GetDebug() > 1 )
f5de2f09	208	{
	209	Info("AliHBTTrackPoints","n %d; X %f; Y %f; Z %f",n,x,y,z);
	210	}
f5de2f09	211	}
9616170a	212	/***************************************************************/
f5de2f09	213
	214	Double_t AliHBTTrackPoints::AvarageDistance(const AliHBTTrackPoints& tr)
	215	{
	216	//returns the aritmethic avarage distance between two tracks
	217	if (fN != tr.fN)
	218	{
	219	Error("AvarageDistance","Number of points is not equal");
	220	return -1;
	221	}
	222	if ( (fN <= 0) \|\| (tr.fN <=0) )
	223	{
	224	Error("AvarageDistance","One of tracks is empty");
	225	return -1;
	226	}
	227
38b5f605	228	Double_t sum = 0;
f5de2f09	229	for (Int_t i = 0; i<fN; i++)
f5de2f09	230	{
9616170a	231	if (GetDebug()>9)
	232	{
	233	// Float_t r1sq = fX[i]fX[i]+fY[i]fY[i];
	234	// Float_t r2sq = tr.fX[i]tr.fX[i]+tr.fY[i]tr.fY[i];
	235	Float_t r1sq = TMath::Hypot(fX[i],fY[i]);
	236	Float_t r2sq = TMath::Hypot(tr.fX[i],tr.fY[i]);
	237	Info("AvarageDistance","radii: %f %f",r1sq,r2sq);
	238	}
	239
	240
	241	Double_t dx = fX[i]-tr.fX[i];
	242	Double_t dy = fY[i]-tr.fY[i];
	243	Double_t dz = fZ[i]-tr.fZ[i];
	244	sum+=TMath::Sqrt(dxdx + dydy + dz*dz);
	245
	246	if (GetDebug()>0)
	247	{
	248	Info("AvarageDistance","Diff: x ,y z: %f , %f, %f",dx,dy,dz);
	249	Info("AvarageDistance","xxyyzz %f %f %f %f %f %f",
	250	fX[i],tr.fX[i],fY[i],tr.fY[i],fZ[i],tr.fZ[i]);
	251	}
f5de2f09	252	}
9616170a	253
	254	Double_t retval = sum/((Double_t)fN);
	255	if ( GetDebug() )
	256	{
	257	Info("AvarageDistance","Avarage distance is %f.",retval);
	258	}
	259	return retval;
f5de2f09	260	}
9616170a	261	/***************************************************************/
	262	/***************************************************************/
	263	/***************************************************************/
81877d10	264	/***************************************************************/
	265	/***************************************************************/
	266	/***************************************************************/
f5de2f09	267
f5de2f09	268	#include "AliRun.h"
81877d10	269	#include "AliESD.h"
f5de2f09	270	#include "AliRunLoader.h"
	271	#include "AliTPCtrack.h"
	272	#include "TTree.h"
	273	#include "TBranch.h"
	274	#include "TH2D.h"
	275	#include "TCanvas.h"
	276	#include "AliMagF.h"
	277
	278
	279
81877d10	280
	281	void AliHBTTrackPoints::testesd(Int_t entr,const char* fname )
	282	{
81877d10	283	delete gAlice;
	284	gAlice = 0x0;
	285	AliRunLoader* rl = AliRunLoader::Open();
	286	rl->LoadgAlice();
	287
	288	Float_t mf = rl->GetAliRun()->Field()->SolenoidField();
	289
	290
	291	TFile* fFile = TFile::Open(fname);
	292
	293	if (fFile == 0x0)
	294	{
	295	printf("testesd: There is no suche a ESD file\n");
	296	return;
	297	}
	298	AliESD* esd = dynamic_cast<AliESD*>(fFile->Get("0"));
	299	AliESDtrack *t = esd->GetTrack(entr);
	300	if (t == 0x0)
	301	{
	302	::Error("testesd","Can not get track %d",entr);
	303	return;
	304	}
	305
	306
	307	Int_t N = 170;
	308	AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,mf,1.);
	309
	310	Float_t xmin = -250;
	311	Float_t xmax = 250;
	312
	313	Float_t ymin = -250;
	314	Float_t ymax = 250;
	315
	316	Float_t zmin = -250;
	317	Float_t zmax = 250;
	318
	319	TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
	320	TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
	321	TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
	322
	323	TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
	324	TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
	325	TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
	326
	327	hxyt->SetDirectory(0x0);
	328	hxy->SetDirectory(0x0);
	329	hxyTR->SetDirectory(0x0);
	330
	331	hxzt->SetDirectory(0x0);
	332	hxz->SetDirectory(0x0);
	333	hxzTR->SetDirectory(0x0);
	334
	335	Float_t x,y,z;
	336
	337	for (Int_t i = 0;i<N;i++)
	338	{
	339	Double_t r = 84.1+i;
	340	tp->PositionAt(i,x,y,z);
	341	hxy->Fill(x,y);
	342	hxz->Fill(x,z);
	343	printf("Rdemanded %f\n",r);
	344	printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
	345
	346	}
347
348	rl->LoadTrackRefs();
349	TTree* treeTR = rl->TreeTR();
350	TBranch* b = treeTR->GetBranch("TPC");
351
352	TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
353	AliTrackReference* tref;
354	b->SetAddress(&trackrefs);
355
356	Int_t tlab = TMath::Abs(t->GetLabel());
357
358	Int_t netr = (Int_t)treeTR->GetEntries();
359	printf("Found %d entries in TR tree\n",netr);
360
361	for (Int_t e = 0; e < netr; e++)
362	{
363	treeTR->GetEntry(e);
364	tref = (AliTrackReference*)trackrefs->At(0);
365	if (tref == 0x0) continue;
366	if (tref->GetTrack() != tlab) continue;
367
368	printf("Found %d entries in TR array\n",trackrefs->GetEntries());
369
370	for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
371	{
372	tref = (AliTrackReference*)trackrefs->At(i);
373	if (tref->GetTrack() != tlab) continue;
374	x = tref->X();
375	y = tref->Y();
376	z = tref->Z();
377	printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
378
379	hxzTR->Fill(x,z);
380	hxyTR->Fill(x,y);
381	for (Int_t j = 1; j < 10; j++)
382	{
383	hxyTR->Fill(x, y+j*0.1);
384	hxyTR->Fill(x, y-j*0.1);
385	hxyTR->Fill(x+j*0.1,y);
386	hxyTR->Fill(x-j*0.1,y);
387
388	hxzTR->Fill(x,z-j*0.1);
389	hxzTR->Fill(x,z+j*0.1);
390	hxzTR->Fill(x-j*0.1,z);
391	hxzTR->Fill(x+j*0.1,z);
392	}
393	}
394	break;
395	}
396	hxy->Draw("");
397	// hxzt->Draw("same");
398	hxyTR->Draw("same");
399
400	delete rl;
401	}
402
403	/***************************************************************/
404	/***************************************************************/
405	/***************************************************************/
a1d9ea02	406
81877d10	407	void AliHBTTrackPoints::testtpc(Int_t entr)
f5de2f09	408	{
	409	delete gAlice;
	410	gAlice = 0x0;
	411	AliRunLoader* rl = AliRunLoader::Open();
	412	AliLoader* l = rl->GetLoader("TPCLoader");
	413	rl->LoadgAlice();
	414	AliKalmanTrack::SetConvConst(100/0.299792458/0.2/rl->GetAliRun()->Field()->Factor());
	415	l->LoadTracks();
	416	AliTPCtrack* t = new AliTPCtrack();
	417	TBranch* b=l->TreeT()->GetBranch("tracks");
	418	b->SetAddress(&t);
	419	l->TreeT()->GetEntry(entr);
	420	Int_t N = 160;
	421	AliHBTTrackPoints* tp = new AliHBTTrackPoints(N,t,1.);
	422
81877d10	423	Float_t xmin = -250;
	424	Float_t xmax = 250;
	425
	426	Float_t ymin = -250;
	427	Float_t ymax = 250;
f5de2f09	428
81877d10	429	Float_t zmin = -250;
	430	Float_t zmax = 250;
	431
	432	TH2D* hxy = new TH2D("hxy","hxy",1000,xmin,xmax,1000,ymin,ymax);
	433	TH2D* hxyt = new TH2D("hxyt","hxyt",1000,xmin,xmax,1000,ymin,ymax);
	434	TH2D* hxyTR = new TH2D("hxyTR","hxyTR",1000,xmin,xmax,1000,ymin,ymax);
	435
	436	TH2D* hxz = new TH2D("hxz","hxz",1000,xmin,xmax,1000,zmin,zmax);
	437	TH2D* hxzt = new TH2D("hxzt","hxzt",1000,xmin,xmax,1000,zmin,zmax);
	438	TH2D* hxzTR = new TH2D("hxzTR","hxzTR",1000,xmin,xmax,1000,zmin,zmax);
f5de2f09	439
	440	hxyt->SetDirectory(0x0);
	441	hxy->SetDirectory(0x0);
	442	hxyTR->SetDirectory(0x0);
	443
	444	hxzt->SetDirectory(0x0);
	445	hxz->SetDirectory(0x0);
	446	hxzTR->SetDirectory(0x0);
	447
	448	Float_t x,y,z;
	449
	450	for (Int_t i = 0;i<N;i++)
	451	{
	452	Double_t r = 84.1+i;
	453	tp->PositionAt(i,x,y,z);
	454	hxy->Fill(x,y);
	455	hxz->Fill(x,z);
	456	printf("Rdemanded %f\n",r);
	457	printf("tpx %f tpy %f tpz %f Rt =%f\n", x,y,z,TMath::Hypot(x,y));
	458
	459	//BUT they are local!!!!
	460	t->PropagateTo(r);
f237a6b2	461	// Double_t phi = t->Phi();
f5de2f09	462	Double_t rl = TMath::Hypot(t->GetX(),t->GetY());//real radius
	463
	464	Double_t alpha = t->GetAlpha();
	465	Double_t salpha = TMath::Sin(alpha);
	466	Double_t calpha = TMath::Cos(alpha);
	467	x = t->GetX()calpha - t->GetY()salpha;
	468	y = t->GetX()salpha + t->GetY()calpha;
	469	z = t->GetZ();
	470
	471	printf("tx %f ty %f tz %f Rt = %f R from XY %f\n",x,y,z,TMath::Hypot(x,y),rl);
	472
	473	printf("tpz - tz %f\n",z-t->GetZ());
	474	printf("\n");
	475	hxyt->Fill(x,y);
	476	hxzt->Fill(x,z);
	477
	478	}
	479
	480	rl->LoadTrackRefs();
	481	TTree* treeTR = rl->TreeTR();
	482	b = treeTR->GetBranch("TPC");
	483
	484	TClonesArray* trackrefs = new TClonesArray("AliTrackReference", 100);
	485	AliTrackReference* tref;
	486	b->SetAddress(&trackrefs);
	487
	488	Int_t tlab = TMath::Abs(t->GetLabel());
	489
f237a6b2	490	Int_t netr = (Int_t)treeTR->GetEntries();
f5de2f09	491	printf("Found %d entries in TR tree\n",netr);
	492
	493	for (Int_t e = 0; e < netr; e++)
	494	{
	495	treeTR->GetEntry(e);
	496	tref = (AliTrackReference*)trackrefs->At(0);
	497	if (tref == 0x0) continue;
	498	if (tref->GetTrack() != tlab) continue;
	499
	500	printf("Found %d entries in TR array\n",trackrefs->GetEntries());
	501
	502	for (Int_t i = 0; i < trackrefs->GetEntries(); i++)
	503	{
	504	tref = (AliTrackReference*)trackrefs->At(i);
	505	if (tref->GetTrack() != tlab) continue;
	506	x = tref->X();
	507	y = tref->Y();
	508	z = tref->Z();
	509	printf("Track Ref: x %f y %f z %f\n",tref->X(),tref->Y(),tref->Z());
	510
	511	hxzTR->Fill(x,z);
	512	hxyTR->Fill(x,y);
	513	for (Int_t j = 1; j < 10; j++)
	514	{
	515	hxyTR->Fill(x, y+j*0.1);
	516	hxyTR->Fill(x, y-j*0.1);
	517	hxyTR->Fill(x+j*0.1,y);
	518	hxyTR->Fill(x-j*0.1,y);
	519
	520	hxzTR->Fill(x,z-j*0.1);
	521	hxzTR->Fill(x,z+j*0.1);
	522	hxzTR->Fill(x-j*0.1,z);
	523	hxzTR->Fill(x+j*0.1,z);
	524	}
	525	}
	526	break;
	527	}
	528	hxz->Draw("");
	529	// hxzt->Draw("same");
	530	hxzTR->Draw("same");
	531
	532	delete rl;
	533	}