New include needed

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

diff --git a/ITS/AliITSVertexer.cxx b/ITS/AliITSVertexer.cxx
index 0687fc7fc181a5fa0d56e94d90c470d763ce280e..ccb8bcb896055ffda018ead9904e8b0cc5392450 100644 (file)
--- a/ITS/AliITSVertexer.cxx
+++ b/ITS/AliITSVertexer.cxx
@@ -1,46 +1,61 @@
 #include <AliESDVertex.h>
-#include <AliITSVertexer.h>
-#include <AliRunLoader.h>
-#include <AliITSLoader.h>
-#include <AliMultiplicity.h>
-#include <AliITSMultReconstructor.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                                //
+// derived classes: AliITSVertexerIons AliITSvertexer3D             //
+//                  AliITSVertexerCosmics                           //
 //////////////////////////////////////////////////////////////////////
 
 //______________________________________________________________________
-AliITSVertexer::AliITSVertexer():AliVertexer() {
+AliITSVertexer::AliITSVertexer():AliVertexer(),
+fLadders(), 
+fLadOnLay2(0)   {
   // Default Constructor
+  SetLaddersOnLayer2();
 }
 
-AliITSVertexer::AliITSVertexer(TString filename):AliVertexer() {
+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();
+  //  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;
+  //  Int_t lst;
+  SetLastEvent(rl->GetNumberOfEvents()-1);
+  /*
   if(rl->TreeE()){
     lst = static_cast<Int_t>(rl->TreeE()->GetEntries());
     SetLastEvent(lst-1);
   }
+  */
+  SetLaddersOnLayer2();
 }
 
 //______________________________________________________________________
@@ -58,6 +73,12 @@ AliITSVertexer& AliITSVertexer::operator=(const AliITSVertexer& /* vtxr */){
   return *this;
 }
 
+//______________________________________________________________________
+AliITSVertexer::~AliITSVertexer() {
+  // Destructor
+ if(fLadders) delete [] fLadders;
+}
+
 //______________________________________________________________________
 void AliITSVertexer::FindMultiplicity(Int_t evnumber){
   // Invokes AliITSMultReconstructor to determine the
@@ -91,10 +112,12 @@ void AliITSVertexer::FindMultiplicity(Int_t evnumber){
   Float_t *tht = new Float_t [notracks];
   Float_t *phi = new Float_t [notracks];
   Float_t *dphi = new Float_t [notracks];
+  Int_t *labels = new Int_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];
+    labels[i] = multReco->GetTracklet(i)[3];
   }
   Int_t nosingleclus=multReco->GetNSingleClusters();
   Float_t *ths = new Float_t [nosingleclus];
@@ -103,7 +126,7 @@ void AliITSVertexer::FindMultiplicity(Int_t evnumber){
     ths[i] = multReco->GetCluster(i)[0];
     phs[i] =  multReco->GetCluster(i)[1];
   }
-  fMult = new AliMultiplicity(notracks,tht,phi,dphi,nosingleclus,ths,phs);
+  fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,nosingleclus,ths,phs);
   delete [] tht;
   delete [] phi;
   delete [] dphi;
@@ -114,6 +137,49 @@ void AliITSVertexer::FindMultiplicity(Int_t evnumber){
   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
@@ -125,3 +191,4 @@ void AliITSVertexer::WriteCurrentVertex(){
   Int_t rc = itsLoader->PostVertex(fCurrentVertex);
   rc = itsLoader->WriteVertices();
 }
+