| 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> |
| 26 | |
| 27 | class TTree; |
| 28 | class AliESDVertex; |
| 29 | class AliITSgeom; |
| 30 | |
| 31 | class AliITSVertexer3DTapan : public TObject { |
| 32 | public: |
| 33 | AliITSVertexer3DTapan(Int_t n=10000):fITSgeom(0), |
| 34 | fX1(n),fY1(n),fZ1(n), fPhi1(n), ficlu1(0), |
| 35 | fX2(n),fY2(n),fZ2(n), fPhi2(n), ficlu2(0) {;} |
| 36 | AliITSVertexer3DTapan(const AliITSgeom *g, Int_t n=10000): fITSgeom(g), |
| 37 | fX1(n),fY1(n),fZ1(n), fPhi1(n), ficlu1(0), |
| 38 | fX2(n),fY2(n),fZ2(n), fPhi2(n), ficlu2(0) {;} |
| 39 | virtual ~AliITSVertexer3DTapan(){} |
| 40 | |
| 41 | Int_t LoadClusters(TTree *cf); |
| 42 | void FindVertexForCurrentEvent(AliESDVertex *vtx); |
| 43 | |
| 44 | protected: |
| 45 | void CalculatePhi(Float_t fx, Float_t fy, Float_t & phi); |
| 46 | void CalculateVertex3d1(Double_t pos[3], Float_t cuts[3], Int_t &ncontr); |
| 47 | void CalculateVertex3d2(Double_t pos[3], Float_t cuts[3], Int_t &ncontr, Double_t sigpos[3]); |
| 48 | 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; |
| 49 | |
| 50 | private: |
| 51 | AliITSVertexer3DTapan(AliITSVertexer3DTapan &); |
| 52 | AliITSVertexer3DTapan& operator=(const AliITSVertexer3DTapan &); |
| 53 | |
| 54 | const AliITSgeom *fITSgeom; //the ITS geometry |
| 55 | |
| 56 | TArrayD fX1; // X position of cluster on layer 1 of ITS |
| 57 | TArrayD fY1; // Y position of cluster on layer 1 of ITS |
| 58 | TArrayD fZ1; // Z position of cluster on layer 1 of ITS |
| 59 | TArrayD fPhi1; // Phi position of cluster on layer 1 of ITS |
| 60 | Int_t ficlu1; // Number of clusters on layer 1 of ITS |
| 61 | |
| 62 | TArrayD fX2; // X position of cluster on layer 2 of ITS |
| 63 | TArrayD fY2; // Y position of cluster on layer 2 of ITS |
| 64 | TArrayD fZ2; // Z position of cluster on layer 2 of ITS |
| 65 | TArrayD fPhi2; // Phi position of cluster on layer 2 of ITS |
| 66 | Int_t ficlu2; // Number of clusters on layer 2 of ITS |
| 67 | |
| 68 | ClassDef(AliITSVertexer3DTapan,1); |
| 69 | }; |
| 70 | |
| 71 | #endif |
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