1 #ifndef ALIITSSEGMENTATIONSDD_H
2 #define ALIITSSEGMENTATIONSDD_H
5 #include "AliITSsegmentation.h"
7 //////////////////////////////////////////////////////
8 // Segmentation class for SDD //
10 //////////////////////////////////////////////////////
11 class AliITSsegmentationSDD :
12 public AliITSsegmentation {
16 AliITSsegmentationSDD();
17 AliITSsegmentationSDD(const AliITSsegmentationSDD &source);
18 AliITSsegmentationSDD& operator=(const AliITSsegmentationSDD &source);
19 AliITSsegmentationSDD(AliITSgeom *gm);
20 virtual ~AliITSsegmentationSDD(){}
22 // Set Detector Segmentation Parameters
24 // get the drift speed used for this segmentation
25 virtual Float_t GetDriftSpeed()const{return fDriftSpeed;}
26 // Set the drift speed needed for this segmentation
27 virtual void SetDriftSpeed(Float_t ds){
32 virtual void SetPadSize(Float_t pitch, Float_t clock)
33 {fPitch=pitch;fTimeStep=1000./clock;}
35 // Maximum number of cells along the two coordinates z,x (anodes,samples)
36 virtual void SetNPads(Int_t p1, Int_t p2)
37 {fNanodes=2*p1;fNsamples=p2;}
38 // Returns the maximum number of cells (digits) posible
39 virtual Int_t GetNPads() const {return fNanodes*fNsamples;}
41 // Transform from real local to cell coordinates
42 virtual void GetPadIxz(Float_t x ,Float_t z ,Int_t &ix,Int_t &iz) const;
43 // Transform from cell to real local coordinates
44 virtual void GetPadCxz(Int_t ix,Int_t iz,Float_t &x ,Float_t &z ) const;
46 // Get anode and time bucket as floats - numbering from 0
47 virtual void GetPadTxz(Float_t &x ,Float_t &z) const;
48 // Transformation from Geant cm detector center local coordinates
49 // to detector segmentation/cell coordiantes starting from (0,0).
50 virtual Bool_t LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const;
51 // Transformation from detector segmentation/cell coordiantes starting
52 // from (0,0) to Geant cm detector center local coordinates.
53 virtual void DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const;
55 virtual Float_t GetAnodeFromLocal(Float_t x,Float_t z) const;
56 virtual Int_t GetSideFromLocalX(Float_t xloc) const {
57 if(xloc>0) return 0; // left side (channel 0) positive xloc
58 else return 1; // right side (channel 1) negative xloc
60 virtual Float_t GetLocalZFromAnode(Int_t nAnode) const;
61 virtual Float_t GetLocalZFromAnode(Float_t zAnode) const;
62 virtual Float_t GetDriftTimeFromTb(Int_t tb) const {
63 Float_t xtb=(Float_t)tb+0.5;
64 return GetDriftTimeFromTb(xtb);
66 virtual Float_t GetDriftTimeFromTb(Float_t xtb) const {
69 virtual Int_t GetNumberOfChips() const {
70 return fgkNchipsPerHybrid;
72 virtual Int_t GetChipFromLocal(Float_t xloc, Float_t zloc) const;
73 virtual Int_t GetChipFromChannel(Int_t ix, Int_t iz) const;
77 void InitFromGeom(AliITSgeom *geom);
82 virtual Float_t Dpx(Int_t) const {return fTimeStep;}
84 virtual Float_t Dpz(Int_t) const {return fPitch;}
86 // Maximum number of samples in x
87 virtual Int_t Npx() const {return fNsamples;}
88 // Maximum number of anodes in z
89 virtual Int_t Npz() const {return fNanodes;}
90 // Maximum number of anodes in z
91 virtual Int_t NpzHalf() const {return fNanodes/2;}
94 // Get next neighbours
95 virtual void Neighbours(Int_t iX,Int_t iZ,Int_t* Nlist,Int_t Xlist[10],
96 Int_t Zlist[10]) const;
98 // Current integration limits
99 virtual void IntegrationLimits(Float_t&,Float_t&,Float_t&,Float_t&) {}
101 virtual void Print(Option_t *opt="") const;
102 // Print default parameters (static const data members, if any)
103 virtual void PrintDefaultParameters() const;
107 virtual void Copy(TObject &obj) const;
109 Int_t fNsamples; // Number of time samples in x
110 Int_t fNanodes; // Summed # of anodes in the two det halves (z)
111 Float_t fPitch; // Anode pitch - microns
112 Float_t fTimeStep; // Sampling time - ns
113 Float_t fDriftSpeed; // Drift speed
114 Bool_t fSetDriftSpeed; // flag for usage of drift speed
115 static const Float_t fgkDxDefault; // Default value for fDx
116 static const Float_t fgkDzDefault; // Default value for fDz
117 static const Float_t fgkDyDefault; // Default value for fDy
118 static const Float_t fgkPitchDefault; //Default value for fPitch
119 static const Float_t fgkClockDefault; //Default value for the clock freq.
120 static const Int_t fgkHalfNanodesDefault; //Default value for fNanodes/2
121 static const Int_t fgkNsamplesDefault; //Default value for fNsamples
122 static const Int_t fgkNchipsPerHybrid; //number of chips per hybrid
123 static const Int_t fgkNanodesPerChip; //number of chips per hybrid
124 static const Float_t fgkCm2Micron; // conversion from cm to micron
125 static const Float_t fgkMicron2Cm; // conversion from micron to cm
126 ClassDef(AliITSsegmentationSDD,6) // SDD segmentation