1 #ifndef AliHMPIDDigit_h
2 #define AliHMPIDDigit_h
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 // Class of HMPID to manage digits ---> pads
11 #include <AliDigit.h> //base class
12 #include <AliRawReader.h>
14 #include "TMath.h" //Mathieson()
15 #include <AliBitPacking.h> //Raw()
16 #include "AliHMPIDParam.h"
18 class TClonesArray; //Hit2Sdi()
20 class AliHMPIDDigit :public AliDigit //TObject-AliDigit-AliHMPIDDigit
25 AliHMPIDDigit( ):AliDigit( ),fPad(AliHMPIDParam::Abs(-1,-1,-1,-1)),fQ(-1) {} //default ctor
26 AliHMPIDDigit(Int_t pad,Int_t q,Int_t *t):AliDigit(t),fPad(pad ),fQ(q ) {if(fQ>4095)fQ=4095;} //digit ctor
27 AliHMPIDDigit(Int_t pad,Int_t q ):AliDigit( ),fPad(pad ),fQ(q ) {if(fQ>4095)fQ=4095;} //digit ctor
28 AliHMPIDDigit(const AliHMPIDDigit &d ):AliDigit(d),fPad(d.fPad),fQ(d.fQ) {} //copy ctor
29 virtual ~AliHMPIDDigit() {} //dtor
31 Bool_t IsSortable ( )const{return kTRUE;} //provision to use TObject::Sort()
32 inline Int_t Compare (const TObject *pObj )const; //provision to use TObject::Sort()
33 void Draw (Option_t *opt="" ); //TObject::Draw() overloaded
34 void Print (Option_t *opt="" )const; //TObject::Print() overloaded
37 void AddTidOffset(Int_t offset ) {for (Int_t i=0; i<3; i++) if (fTracks[i]>0) fTracks[i]+=offset; } //needed for merging
38 Int_t Ch ( )const{return AliHMPIDParam::A2C(fPad); } //chamber number
40 Float_t LorsX ( )const{return AliHMPIDParam::LorsX(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2X(fPad)); } //center of the pad x, [cm]
42 Float_t LorsY ( )const{return AliHMPIDParam::LorsY(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2Y(fPad)); } //center of the pad y, [cm]
44 inline Double_t MathiesonX (Double_t x )const; //Mathieson distribution along wires X
45 inline Double_t MathiesonY (Double_t x )const; //Mathieson distribution perp to wires Y
46 inline Double_t IntPartMathiX(Double_t z )const; //integral in 1-dim of Mathieson X
47 inline Double_t IntPartMathiY(Double_t z )const; //integral in 1-dim of Mathieson Y
48 inline Double_t IntMathieson (Double_t x,Double_t y )const; //integral in 2-dim of Mathieson
49 Int_t PadPcX ( )const{return AliHMPIDParam::A2X(fPad);} //pad pc x # 0..79
50 Int_t PadPcY ( )const{return AliHMPIDParam::A2Y(fPad);} //pad pc y # 0..47
51 Int_t PadChX ( )const{return (Pc()%2)*AliHMPIDParam::kPadPcX+PadPcX();} //pad ch x # 0..159
52 Int_t PadChY ( )const{return (Pc()/2)*AliHMPIDParam::kPadPcY+PadPcY();} //pad ch y # 0..143
53 Int_t Pad ( )const{return fPad;} //absolute id of this pad
54 Int_t Pc ( )const{return AliHMPIDParam::A2P(fPad);} //PC position number
55 Float_t Q ( )const{return fQ;} //charge, [QDC]
56 inline void Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const;
57 inline Bool_t Set (Int_t c,Int_t p,Int_t x,Int_t y,Int_t tid=0); //manual creation
58 void SetQ (Float_t q ) {fQ=q;if(fQ>4095)fQ=4095;} //setter for charge
59 void SetPad (Int_t pad ) {fPad=pad;} //setter for pad
61 protected: //AliDigit has fTracks[3]
64 Int_t fPad; //absolute pad number
65 Float_t fQ; //QDC value, fractions are permitted for summable procedure
66 ClassDef(AliHMPIDDigit,4) //HMPID digit class
67 };//class AliHMPIDDigit
69 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
71 Int_t AliHMPIDDigit::Compare(const TObject *pObj) const
73 // Used in Sort() method to compare to objects. Note that abs pad structure is first x then y, hence will be sorted on column basis.
74 // This feature is used in digitizer to facilitate finding of sdigits for the same pad since they all will come together after sorting.
75 // Arguments: pObj - pointer to object to compare with
76 // Retunrs: -1 if AbsPad less then in pObj, 1 if more and 0 if they are the same
77 if (fPad==((AliHMPIDDigit*)pObj)->Pad()) return 0;
78 else if(fPad >((AliHMPIDDigit*)pObj)->Pad()) return 1;
81 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
83 Double_t AliHMPIDDigit::MathiesonX(Double_t x)const
85 // Mathieson function.
86 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
87 // Arguments: x- position of the center of Mathieson distribution
88 // Returns: value of the Mathieson function
90 Double_t lambda = x/AliHMPIDParam::PitchAnodeCathode();
91 Double_t tanh = TMath::TanH(AliHMPIDParam::K2x()*lambda);
92 Double_t a=1-tanh*tanh;
93 Double_t b=1+AliHMPIDParam::SqrtK3x()*AliHMPIDParam::SqrtK3x()*tanh*tanh;
94 Double_t mathi = AliHMPIDParam::K1x()*a/b;
97 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
99 Double_t AliHMPIDDigit::MathiesonY(Double_t y)const
101 // Mathieson function.
102 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
103 // Arguments: x- position of the center of Mathieson distribution
104 // Returns: value of the Mathieson function
106 Double_t lambda = y/AliHMPIDParam::PitchAnodeCathode();
107 Double_t tanh = TMath::TanH(AliHMPIDParam::K2y()*lambda);
108 Double_t a=1-tanh*tanh;
109 Double_t b=1+AliHMPIDParam::SqrtK3y()*AliHMPIDParam::SqrtK3y()*tanh*tanh;
110 Double_t mathi = AliHMPIDParam::K1y()*a/b;
113 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
115 Double_t AliHMPIDDigit::IntPartMathiX(Double_t x)const
117 // Integration of Mathieson.
118 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
119 // Arguments: x,y- position of the center of Mathieson distribution
120 // Returns: a charge fraction [0-1] imposed into the pad
121 Double_t shift1 = -LorsX()+0.5*AliHMPIDParam::SizePadX();
122 Double_t shift2 = -LorsX()-0.5*AliHMPIDParam::SizePadX();
124 Double_t ux1=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift1)/AliHMPIDParam::PitchAnodeCathode());
125 Double_t ux2=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift2)/AliHMPIDParam::PitchAnodeCathode());
127 return AliHMPIDParam::K4x()*(TMath::ATan(ux2)-TMath::ATan(ux1));
129 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
131 Double_t AliHMPIDDigit::IntPartMathiY(Double_t y)const
133 // Integration of Mathieson.
134 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
135 // Arguments: x,y- position of the center of Mathieson distribution
136 // Returns: a charge fraction [0-1] imposed into the pad
137 Double_t shift1 = -LorsY()+0.5*AliHMPIDParam::SizePadY();
138 Double_t shift2 = -LorsY()-0.5*AliHMPIDParam::SizePadY();
140 Double_t uy1=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift1)/AliHMPIDParam::PitchAnodeCathode());
141 Double_t uy2=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift2)/AliHMPIDParam::PitchAnodeCathode());
143 return AliHMPIDParam::K4y()*(TMath::ATan(uy2)-TMath::ATan(uy1));
146 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
148 Double_t AliHMPIDDigit::IntMathieson(Double_t x,Double_t y)const
150 // Integration of Mathieson.
151 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
152 // Arguments: x,y- position of the center of Mathieson distribution
153 // Returns: a charge fraction [0-1] imposed into the pad
155 Double_t xm = IntPartMathiX(x);
156 Double_t ym = IntPartMathiY(y);
159 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
160 void AliHMPIDDigit::Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const
162 // Convert digit structure to raw word format
163 // Arguments: w32,ddl,r,d,a where to write the results
165 Int_t y2a[6]={5,3,1,0,2,4};
167 ddl=2*Ch()+Pc()%2; //DDL# 0..13
168 Int_t tmp=1+Pc()/2*8+PadPcY()/6; r=(Pc()%2)? tmp:25-tmp; //row r=1..24
169 d=1+PadPcX()/8; //DILOGIC# 1..10
170 a=y2a[PadPcY()%6]+6*(7-PadPcX()%8); //ADDRESS 0..47
173 //Printf("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
175 //Printf("AliHMPIDDigit::Raw ddl: %d r: %d d: %d a: %d",ddl,r,d,a);
176 //Printf("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
177 // Bool_t isOK=kTRUE; isOK=
178 AliBitPacking::PackWord((UInt_t)fQ,w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
179 assert(0<=a&&a<=47);AliBitPacking::PackWord( a ,w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
180 assert(1<=d&&d<=10);AliBitPacking::PackWord( d ,w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
181 assert(1<=r&&r<=24);AliBitPacking::PackWord( r ,w32,22,26); // Row number bits (22..26) counts (1..24)
182 AliBitPacking::PackWord((UInt_t)0, w32,27,27); //To make sure set the 27th bit to Zero so we can distinguis it from the EoE
184 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
185 Bool_t AliHMPIDDigit::Set(Int_t ch,Int_t pc,Int_t px,Int_t py,Int_t tid)
187 // Manual creation of digit
188 // Arguments: ch,pc,px,py,qdc,tid
189 // Returns: kTRUE if wrong digit
190 if(px<AliHMPIDParam::kMinPx || px>AliHMPIDParam::kMaxPx) return kTRUE;
191 if(py<AliHMPIDParam::kMinPy || py>AliHMPIDParam::kMaxPy) return kTRUE;
193 fPad=AliHMPIDParam::Abs(ch,pc,px,py);fTracks[0]=tid;
197 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++