[u/mrichter/AliRoot.git] / ITS / AliITSVertexer.cxx

#include <AliESDVertex.h>
#include "AliITSgeom.h"
#include "AliITSVertexer.h"
#include "AliRunLoader.h"
#include "AliITSLoader.h"
#include "AliMultiplicity.h"
#include "AliITSMultReconstructor.h"

const Float_t AliITSVertexer::fgkPipeRadius = 3.0;

ClassImp(AliITSVertexer)

//////////////////////////////////////////////////////////////////////
// Base class for primary vertex reconstruction                     //
// AliESDVertexer is a class for full 3D primary vertex finding     //
// derived classes: AliITSVertexerIons AliITSvertexerPPZ            //
//                  AliITSVertexer3D                                //
//////////////////////////////////////////////////////////////////////

//______________________________________________________________________
AliITSVertexer::AliITSVertexer():AliVertexer(),
fLadders(), 
fLadOnLay2(0)	 {
  // Default Constructor
  SetLaddersOnLayer2();
}

AliITSVertexer::AliITSVertexer(TString filename):AliVertexer(),
fLadders(), 
fLadOnLay2(0)
{
  // Standard constructor
  AliRunLoader *rl = AliRunLoader::GetRunLoader();
  if(!rl){
    Fatal("AliITSVertexer","Run Loader not found");
  }
  /*
  if(rl->LoadgAlice()){
    Fatal("AliITSVertexer","The AliRun object is not available - nothing done");
  }
  */
  fCurrentVertex  = 0;   
  SetFirstEvent(0);
  SetLastEvent(0);
  //  rl->LoadHeader();
  AliITSLoader* itsLoader =  (AliITSLoader*) rl->GetLoader("ITSLoader");
  if(!filename.Contains("default"))itsLoader->SetVerticesFileName(filename);
  if(!filename.Contains("null"))itsLoader->LoadVertices("recreate");
  itsLoader->LoadRecPoints();
  //  Int_t lst;
  SetLastEvent(rl->GetNumberOfEvents()-1);
  /*
  if(rl->TreeE()){
    lst = static_cast<Int_t>(rl->TreeE()->GetEntries());
    SetLastEvent(lst-1);
  }
  */
  SetLaddersOnLayer2();
}

//______________________________________________________________________
AliITSVertexer::AliITSVertexer(const AliITSVertexer &vtxr) : AliVertexer(vtxr) {
  // Copy constructor
  // Copies are not allowed. The method is protected to avoid misuse.
  Error("AliITSVertexer","Copy constructor not allowed\n");
}

//______________________________________________________________________
AliITSVertexer& AliITSVertexer::operator=(const AliITSVertexer& /* vtxr */){
  // Assignment operator
  // Assignment is not allowed. The method is protected to avoid misuse.
  Error("= operator","Assignment operator not allowed\n");
  return *this;
}

//______________________________________________________________________
AliITSVertexer::~AliITSVertexer() {
  // Destructor
 if(fLadders) delete [] fLadders;
}

//______________________________________________________________________
void AliITSVertexer::FindMultiplicity(Int_t evnumber){
  // Invokes AliITSMultReconstructor to determine the
  // charged multiplicity in the pixel layers
  if(fMult){delete fMult; fMult = 0;}
  Bool_t success=kTRUE;
  if(!fCurrentVertex)success=kFALSE;
  if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
  if(!success){
    AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
    return;
  }
  AliITSMultReconstructor* multReco = new AliITSMultReconstructor();
  AliRunLoader *rl =AliRunLoader::GetRunLoader();
  AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
  multReco->SetGeometry(itsLoader->GetITSgeom());
  itsLoader->LoadRecPoints();
  rl->GetEvent(evnumber);
  TTree* itsClusterTree = itsLoader->TreeR();
  if (!itsClusterTree) {
    AliError(" Can't get the ITS cluster tree !\n");
    return;
  }
  Double_t vtx[3];
  fCurrentVertex->GetXYZ(vtx);
  Float_t vtxf[3];
  for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
  multReco->SetHistOn(kFALSE);
  multReco->Reconstruct(itsClusterTree,vtxf,vtxf);
  Int_t notracks=multReco->GetNTracklets();
  Float_t *tht = new Float_t [notracks];
  Float_t *phi = new Float_t [notracks];
  Float_t *dphi = new Float_t [notracks];
  for(Int_t i=0;i<multReco->GetNTracklets();i++){
    tht[i] = multReco->GetTracklet(i)[0];
    phi[i] =  multReco->GetTracklet(i)[1];
    dphi[i] = multReco->GetTracklet(i)[2];
  }
  Int_t nosingleclus=multReco->GetNSingleClusters();
  Float_t *ths = new Float_t [nosingleclus];
  Float_t *phs = new Float_t [nosingleclus];
  for(Int_t i=0;i<nosingleclus;i++){
    ths[i] = multReco->GetCluster(i)[0];
    phs[i] =  multReco->GetCluster(i)[1];
  }
  fMult = new AliMultiplicity(notracks,tht,phi,dphi,nosingleclus,ths,phs);
  delete [] tht;
  delete [] phi;
  delete [] dphi;
  delete [] ths;
  delete [] phs;
  itsLoader->UnloadRecPoints();
  delete multReco;
  return;
}

//______________________________________________________________________
void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
  // Calculates the array of ladders on layer 2 to be used with a 
  // given ladder on layer 1
  fLadOnLay2=ladwid;
  AliRunLoader *rl =AliRunLoader::GetRunLoader();
  AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
  AliITSgeom* geom = itsLoader->GetITSgeom();
  Int_t ladtot1=geom->GetNladders(1);
  if(fLadders) delete [] fLadders;
  fLadders=new UShort_t[ladtot1];


  Double_t pos1[3],pos2[3];
  Int_t mod1=geom->GetModuleIndex(2,1,1);
  geom->GetTrans(mod1,pos1);  // position of the module in the MRS 
  Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
  if(phi0<0) phi0+=2*TMath::Pi();
  Int_t mod2=geom->GetModuleIndex(2,2,1);
  geom->GetTrans(mod2,pos2);
  Double_t phi2=TMath::ATan2(pos2[1],pos2[0]); 
  if(phi2<0) phi2+=2*TMath::Pi();
  Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module

  for(Int_t i= 0; i<ladtot1;i++){
    Int_t modlad= geom->GetModuleIndex(1,i+1,1);
    Double_t posmod[3];
    geom->GetTrans(modlad,posmod);
    Double_t phimod=TMath::ATan2(posmod[1],posmod[0]); 
    if(phimod<0) phimod+=2*TMath::Pi();
    Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
    if(phi1<0) phi1+=2*TMath::Pi();
    if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
    Double_t philad1=phi0-phi1;
    UShort_t lad1;
    Double_t ladder1=(philad1)/(deltaPhi) +1.; 
    if(ladder1<1){ladder1=40+ladder1;}
    lad1=int(ladder1+0.5);
    fLadders[i]=lad1;
  }
}


//______________________________________________________________________
void AliITSVertexer::WriteCurrentVertex(){
  // Write the current AliVertex object to file fOutFile
  AliRunLoader *rl = AliRunLoader::GetRunLoader();
  AliITSLoader* itsLoader =  (AliITSLoader*) rl->GetLoader("ITSLoader");
  fCurrentVertex->SetName("Vertex");
  //  const char * name = fCurrentVertex->GetName();
  //  itsLoader->SetVerticesContName(name);
  Int_t rc = itsLoader->PostVertex(fCurrentVertex);
  rc = itsLoader->WriteVertices();
}
Commit	Line	Data
d681bb2d	1	#include <AliESDVertex.h>
27167524	2	#include "AliITSgeom.h"
	3	#include "AliITSVertexer.h"
	4	#include "AliRunLoader.h"
	5	#include "AliITSLoader.h"
	6	#include "AliMultiplicity.h"
	7	#include "AliITSMultReconstructor.h"
	8
	9	const Float_t AliITSVertexer::fgkPipeRadius = 3.0;
c5f0f3c1	10
	11	ClassImp(AliITSVertexer)
	12
	13	//////////////////////////////////////////////////////////////////////
	14	// Base class for primary vertex reconstruction //
d681bb2d	15	// AliESDVertexer is a class for full 3D primary vertex finding //
41b19549	16	// derived classes: AliITSVertexerIons AliITSvertexerPPZ //
c61c02f4	17	// AliITSVertexer3D //
c5f0f3c1	18	//////////////////////////////////////////////////////////////////////
	19
	20	//______________________________________________________________________
27167524	21	AliITSVertexer::AliITSVertexer():AliVertexer(),
	22	fLadders(),
	23	fLadOnLay2(0) {
c5f0f3c1	24	// Default Constructor
27167524	25	SetLaddersOnLayer2();
c5f0f3c1	26	}
c5f0f3c1	27
27167524	28	AliITSVertexer::AliITSVertexer(TString filename):AliVertexer(),
	29	fLadders(),
	30	fLadOnLay2(0)
	31	{
c5f0f3c1	32	// Standard constructor
88cb7938	33	AliRunLoader *rl = AliRunLoader::GetRunLoader();
	34	if(!rl){
	35	Fatal("AliITSVertexer","Run Loader not found");
	36	}
27167524	37	/*
88cb7938	38	if(rl->LoadgAlice()){
	39	Fatal("AliITSVertexer","The AliRun object is not available - nothing done");
	40	}
27167524	41	*/
c5f0f3c1	42	fCurrentVertex = 0;
c5f0f3c1	43	SetFirstEvent(0);
c5f0f3c1	44	SetLastEvent(0);
27167524	45	// rl->LoadHeader();
41b19549	46	AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
979e3647	47	if(!filename.Contains("default"))itsLoader->SetVerticesFileName(filename);
2257f27e	48	if(!filename.Contains("null"))itsLoader->LoadVertices("recreate");
41b19549	49	itsLoader->LoadRecPoints();
27167524	50	// Int_t lst;
	51	SetLastEvent(rl->GetNumberOfEvents()-1);
	52	/*
88cb7938	53	if(rl->TreeE()){
	54	lst = static_cast<Int_t>(rl->TreeE()->GetEntries());
	55	SetLastEvent(lst-1);
c5f0f3c1	56	}
27167524	57	*/
27167524	58	SetLaddersOnLayer2();
c5f0f3c1	59	}
c5f0f3c1	60
41b19549	61	//______________________________________________________________________
2257f27e	62	AliITSVertexer::AliITSVertexer(const AliITSVertexer &vtxr) : AliVertexer(vtxr) {
41b19549	63	// Copy constructor
	64	// Copies are not allowed. The method is protected to avoid misuse.
	65	Error("AliITSVertexer","Copy constructor not allowed\n");
	66	}
	67
	68	//______________________________________________________________________
	69	AliITSVertexer& AliITSVertexer::operator=(const AliITSVertexer& /* vtxr */){
	70	// Assignment operator
	71	// Assignment is not allowed. The method is protected to avoid misuse.
	72	Error("= operator","Assignment operator not allowed\n");
	73	return *this;
	74	}
	75
27167524	76	//______________________________________________________________________
	77	AliITSVertexer::~AliITSVertexer() {
	78	// Destructor
	79	if(fLadders) delete [] fLadders;
	80	}
	81
32e449be	82	//______________________________________________________________________
	83	void AliITSVertexer::FindMultiplicity(Int_t evnumber){
	84	// Invokes AliITSMultReconstructor to determine the
	85	// charged multiplicity in the pixel layers
	86	if(fMult){delete fMult; fMult = 0;}
	87	Bool_t success=kTRUE;
	88	if(!fCurrentVertex)success=kFALSE;
	89	if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
	90	if(!success){
	91	AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
	92	return;
	93	}
	94	AliITSMultReconstructor* multReco = new AliITSMultReconstructor();
	95	AliRunLoader *rl =AliRunLoader::GetRunLoader();
	96	AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
	97	multReco->SetGeometry(itsLoader->GetITSgeom());
	98	itsLoader->LoadRecPoints();
	99	rl->GetEvent(evnumber);
	100	TTree* itsClusterTree = itsLoader->TreeR();
	101	if (!itsClusterTree) {
	102	AliError(" Can't get the ITS cluster tree !\n");
	103	return;
	104	}
	105	Double_t vtx[3];
	106	fCurrentVertex->GetXYZ(vtx);
	107	Float_t vtxf[3];
	108	for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
	109	multReco->SetHistOn(kFALSE);
	110	multReco->Reconstruct(itsClusterTree,vtxf,vtxf);
32e449be	111	Int_t notracks=multReco->GetNTracklets();
968e8539	112	Float_t *tht = new Float_t [notracks];
32e449be	113	Float_t *phi = new Float_t [notracks];
	114	Float_t *dphi = new Float_t [notracks];
	115	for(Int_t i=0;i<multReco->GetNTracklets();i++){
968e8539	116	tht[i] = multReco->GetTracklet(i)[0];
32e449be	117	phi[i] = multReco->GetTracklet(i)[1];
	118	dphi[i] = multReco->GetTracklet(i)[2];
	119	}
968e8539	120	Int_t nosingleclus=multReco->GetNSingleClusters();
	121	Float_t *ths = new Float_t [nosingleclus];
	122	Float_t *phs = new Float_t [nosingleclus];
	123	for(Int_t i=0;i<nosingleclus;i++){
	124	ths[i] = multReco->GetCluster(i)[0];
	125	phs[i] = multReco->GetCluster(i)[1];
	126	}
	127	fMult = new AliMultiplicity(notracks,tht,phi,dphi,nosingleclus,ths,phs);
	128	delete [] tht;
32e449be	129	delete [] phi;
32e449be	130	delete [] dphi;
968e8539	131	delete [] ths;
968e8539	132	delete [] phs;
32e449be	133	itsLoader->UnloadRecPoints();
	134	delete multReco;
	135	return;
	136	}
c5f0f3c1	137
27167524	138	//______________________________________________________________________
	139	void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
	140	// Calculates the array of ladders on layer 2 to be used with a
	141	// given ladder on layer 1
	142	fLadOnLay2=ladwid;
	143	AliRunLoader *rl =AliRunLoader::GetRunLoader();
	144	AliITSLoader* itsLoader = (AliITSLoader*)rl->GetLoader("ITSLoader");
	145	AliITSgeom* geom = itsLoader->GetITSgeom();
	146	Int_t ladtot1=geom->GetNladders(1);
	147	if(fLadders) delete [] fLadders;
	148	fLadders=new UShort_t[ladtot1];
	149
	150
	151	Double_t pos1[3],pos2[3];
	152	Int_t mod1=geom->GetModuleIndex(2,1,1);
	153	geom->GetTrans(mod1,pos1); // position of the module in the MRS
	154	Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
	155	if(phi0<0) phi0+=2*TMath::Pi();
	156	Int_t mod2=geom->GetModuleIndex(2,2,1);
	157	geom->GetTrans(mod2,pos2);
	158	Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
	159	if(phi2<0) phi2+=2*TMath::Pi();
	160	Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
	161
	162	for(Int_t i= 0; i<ladtot1;i++){
	163	Int_t modlad= geom->GetModuleIndex(1,i+1,1);
	164	Double_t posmod[3];
	165	geom->GetTrans(modlad,posmod);
	166	Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
	167	if(phimod<0) phimod+=2*TMath::Pi();
	168	Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
	169	if(phi1<0) phi1+=2*TMath::Pi();
	170	if(phi1>2TMath::Pi()) phi1-=2TMath::Pi();
	171	Double_t philad1=phi0-phi1;
	172	UShort_t lad1;
	173	Double_t ladder1=(philad1)/(deltaPhi) +1.;
	174	if(ladder1<1){ladder1=40+ladder1;}
	175	lad1=int(ladder1+0.5);
	176	fLadders[i]=lad1;
	177	}
	178	}
	179
	180
c5f0f3c1	181	//______________________________________________________________________
	182	void AliITSVertexer::WriteCurrentVertex(){
	183	// Write the current AliVertex object to file fOutFile
88cb7938	184	AliRunLoader *rl = AliRunLoader::GetRunLoader();
41b19549	185	AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
88cb7938	186	fCurrentVertex->SetName("Vertex");
88cb7938	187	// const char * name = fCurrentVertex->GetName();
41b19549	188	// itsLoader->SetVerticesContName(name);
	189	Int_t rc = itsLoader->PostVertex(fCurrentVertex);
	190	rc = itsLoader->WriteVertices();
c5f0f3c1	191	}