Correct treatment of tracks with pT<pTmin
[u/mrichter/AliRoot.git] / ITS / AliITSVertexer3DTapan.h
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eb35e591 1#ifndef ALIITSVERTEXER3DTAPAN_H
2#define ALIITSVERTEXER3DTAPAN_H
3
4/* See cxx source for full Copyright notice */
5
6
7//-------------------------------------------------------------------------
8// Class AliITSVertexer3DTapan
9// This is a class for the 3d vertex finding
10//
11// Origin: Tapan Nayak, VECC-CERN, Tapan.Nayak@cern.ch
12//-------------------------------------------------------------------------
13
14
15
16//////////////////////////////////////////////////////////////////////////
17// //
18// AliITSVertexer3DTapan //
19// //
20// Implementation of a 3D vertex finder based on //
21// SPD clusters. //
22// //
23//////////////////////////////////////////////////////////////////////////
24
25#include <TArrayD.h>
308c2f7c 26#include "AliITSVertexer.h"
eb35e591 27
28class TTree;
29class AliESDVertex;
eb35e591 30
308c2f7c 31class AliITSVertexer3DTapan : public AliITSVertexer {
eb35e591 32public:
37add1d1 33 AliITSVertexer3DTapan(Int_t n=10000):
eb35e591 34 fX1(n),fY1(n),fZ1(n), fPhi1(n), ficlu1(0),
35 fX2(n),fY2(n),fZ2(n), fPhi2(n), ficlu2(0) {;}
36 virtual ~AliITSVertexer3DTapan(){}
308c2f7c 37 virtual AliESDVertex *FindVertexForCurrentEvent(TTree *cTree);
38 virtual void PrintStatus() const {}
eb35e591 39
40protected:
308c2f7c 41 void LoadClusters(TTree *cTree);
eb35e591 42 void CalculatePhi(Float_t fx, Float_t fy, Float_t & phi);
43 void CalculateVertex3d1(Double_t pos[3], Float_t cuts[3], Int_t &ncontr);
44 void CalculateVertex3d2(Double_t pos[3], Float_t cuts[3], Int_t &ncontr, Double_t sigpos[3]);
45 void CalculateLine(Double_t P1[4], Double_t P2[4], Double_t P3[4], Double_t P4[4], Double_t Pa[3], Double_t Pb[3]) const;
46
47private:
48 AliITSVertexer3DTapan(AliITSVertexer3DTapan &);
49 AliITSVertexer3DTapan& operator=(const AliITSVertexer3DTapan &);
50
eb35e591 51 TArrayD fX1; // X position of cluster on layer 1 of ITS
52 TArrayD fY1; // Y position of cluster on layer 1 of ITS
53 TArrayD fZ1; // Z position of cluster on layer 1 of ITS
54 TArrayD fPhi1; // Phi position of cluster on layer 1 of ITS
55 Int_t ficlu1; // Number of clusters on layer 1 of ITS
56
57 TArrayD fX2; // X position of cluster on layer 2 of ITS
58 TArrayD fY2; // Y position of cluster on layer 2 of ITS
59 TArrayD fZ2; // Z position of cluster on layer 2 of ITS
60 TArrayD fPhi2; // Phi position of cluster on layer 2 of ITS
61 Int_t ficlu2; // Number of clusters on layer 2 of ITS
62
37add1d1 63 ClassDef(AliITSVertexer3DTapan,3);
eb35e591 64};
65
66#endif