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"
17 //#include "AliHMPIDRawStream.h"
19 class TClonesArray; //Hit2Sdi()
21 class AliHMPIDDigit :public AliDigit //TObject-AliDigit-AliHMPIDDigit
28 fPad(AliHMPIDParam::Abs(-1,-1,-1,-1)),
31 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 AliHMPIDDigit(Int_t pad,Int_t q,Int_t *t):
36 {if(fQ>4095) fQ=4095;} //digit ctor
37 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
38 AliHMPIDDigit(Int_t pad,Int_t q):
42 {if(fQ>4095) fQ=4095;} //digit ctor
43 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
44 AliHMPIDDigit& operator=(const AliHMPIDDigit& d)
47 // Assignment operator
50 AliDigit::operator=(d);
56 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
57 AliHMPIDDigit(const AliHMPIDDigit &d):
62 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
63 virtual ~AliHMPIDDigit() {} //dtor
66 Bool_t IsSortable ( )const{return kTRUE;} //provision to use TObject::Sort()
67 inline Int_t Compare (const TObject *pObj )const; //provision to use TObject::Sort()
68 void Draw (Option_t *opt="" ); //TObject::Draw() overloaded
69 void Print (Option_t *opt="" )const; //TObject::Print() overloaded
72 void AddTidOffset(Int_t offset ) {for (Int_t i=0; i<3; i++) if (fTracks[i]>0) fTracks[i]+=offset; } //needed for merging
73 Int_t Ch ( )const{return AliHMPIDParam::A2C(fPad); } //chamber number
75 Float_t LorsX ( )const{return AliHMPIDParam::LorsX(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2X(fPad)); } //center of the pad x, [cm]
77 Float_t LorsY ( )const{return AliHMPIDParam::LorsY(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2Y(fPad)); } //center of the pad y, [cm]
79 inline Double_t MathiesonX (Double_t x )const; //Mathieson distribution along wires X
80 inline Double_t MathiesonY (Double_t x )const; //Mathieson distribution perp to wires Y
81 inline Double_t IntPartMathiX(Double_t z )const; //integral in 1-dim of Mathieson X
82 inline Double_t IntPartMathiY(Double_t z )const; //integral in 1-dim of Mathieson Y
83 inline Double_t IntMathieson (Double_t x,Double_t y )const; //integral in 2-dim of Mathieson
84 Int_t PadPcX ( )const{return AliHMPIDParam::A2X(fPad);} //pad pc x # 0..79
85 Int_t PadPcY ( )const{return AliHMPIDParam::A2Y(fPad);} //pad pc y # 0..47
86 Int_t PadChX ( )const{return (Pc()%2)*AliHMPIDParam::kPadPcX+PadPcX();} //pad ch x # 0..159
87 Int_t PadChY ( )const{return (Pc()/2)*AliHMPIDParam::kPadPcY+PadPcY();} //pad ch y # 0..143
88 Int_t Pad ( )const{return fPad;} //absolute id of this pad
89 Int_t Pc ( )const{return AliHMPIDParam::A2P(fPad);} //PC position number
90 Float_t Q ( )const{return fQ;} //charge, [QDC]
91 inline void Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const;
92 inline Bool_t Set (Int_t c,Int_t p,Int_t x,Int_t y,Int_t tid=0); //manual creation
93 void SetQ (Float_t q ) {fQ=q;if(fQ>4095)fQ=4095;} //setter for charge
94 void SetPad (Int_t pad ) {fPad=pad;} //setter for pad
96 protected: //AliDigit has fTracks[3]
99 Int_t fPad; //absolute pad number
100 Float_t fQ; //QDC value, fractions are permitted for summable procedure
101 ClassDef(AliHMPIDDigit,4) //HMPID digit class
102 };//class AliHMPIDDigit
104 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
106 Int_t AliHMPIDDigit::Compare(const TObject *pObj) const
108 // 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.
109 // This feature is used in digitizer to facilitate finding of sdigits for the same pad since they all will come together after sorting.
110 // Arguments: pObj - pointer to object to compare with
111 // Retunrs: -1 if AbsPad less then in pObj, 1 if more and 0 if they are the same
112 if (fPad==((AliHMPIDDigit*)pObj)->Pad()) return 0;
113 else if(fPad >((AliHMPIDDigit*)pObj)->Pad()) return 1;
116 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
118 Double_t AliHMPIDDigit::MathiesonX(Double_t x)const
120 // Mathieson function.
121 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
122 // Arguments: x- position of the center of Mathieson distribution
123 // Returns: value of the Mathieson function
125 Double_t lambda = x/AliHMPIDParam::PitchAnodeCathode();
126 Double_t tanh = TMath::TanH(AliHMPIDParam::K2x()*lambda);
127 Double_t a=1-tanh*tanh;
128 Double_t b=1+AliHMPIDParam::SqrtK3x()*AliHMPIDParam::SqrtK3x()*tanh*tanh;
129 Double_t mathi = AliHMPIDParam::K1x()*a/b;
132 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
134 Double_t AliHMPIDDigit::MathiesonY(Double_t y)const
136 // Mathieson function.
137 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
138 // Arguments: x- position of the center of Mathieson distribution
139 // Returns: value of the Mathieson function
141 Double_t lambda = y/AliHMPIDParam::PitchAnodeCathode();
142 Double_t tanh = TMath::TanH(AliHMPIDParam::K2y()*lambda);
143 Double_t a=1-tanh*tanh;
144 Double_t b=1+AliHMPIDParam::SqrtK3y()*AliHMPIDParam::SqrtK3y()*tanh*tanh;
145 Double_t mathi = AliHMPIDParam::K1y()*a/b;
148 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
150 Double_t AliHMPIDDigit::IntPartMathiX(Double_t x)const
152 // Integration of Mathieson.
153 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
154 // Arguments: x,y- position of the center of Mathieson distribution
155 // Returns: a charge fraction [0-1] imposed into the pad
156 Double_t shift1 = -LorsX()+0.5*AliHMPIDParam::SizePadX();
157 Double_t shift2 = -LorsX()-0.5*AliHMPIDParam::SizePadX();
159 Double_t ux1=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift1)/AliHMPIDParam::PitchAnodeCathode());
160 Double_t ux2=AliHMPIDParam::SqrtK3x()*TMath::TanH(AliHMPIDParam::K2x()*(x+shift2)/AliHMPIDParam::PitchAnodeCathode());
162 return AliHMPIDParam::K4x()*(TMath::ATan(ux2)-TMath::ATan(ux1));
164 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
166 Double_t AliHMPIDDigit::IntPartMathiY(Double_t y)const
168 // Integration of Mathieson.
169 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
170 // Arguments: x,y- position of the center of Mathieson distribution
171 // Returns: a charge fraction [0-1] imposed into the pad
172 Double_t shift1 = -LorsY()+0.5*AliHMPIDParam::SizePadY();
173 Double_t shift2 = -LorsY()-0.5*AliHMPIDParam::SizePadY();
175 Double_t uy1=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift1)/AliHMPIDParam::PitchAnodeCathode());
176 Double_t uy2=AliHMPIDParam::SqrtK3y()*TMath::TanH(AliHMPIDParam::K2y()*(y+shift2)/AliHMPIDParam::PitchAnodeCathode());
178 return AliHMPIDParam::K4y()*(TMath::ATan(uy2)-TMath::ATan(uy1));
181 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
183 Double_t AliHMPIDDigit::IntMathieson(Double_t x,Double_t y)const
185 // Integration of Mathieson.
186 // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
187 // Arguments: x,y- position of the center of Mathieson distribution
188 // Returns: a charge fraction [0-1] imposed into the pad
190 Double_t xm = IntPartMathiX(x);
191 Double_t ym = IntPartMathiY(y);
194 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
195 void AliHMPIDDigit::Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const
197 // Convert digit structure to raw word format
198 // Arguments: w32,ddl,r,d,a where to write the results
200 Int_t y2a[6]={5,3,1,0,2,4};
202 ddl=2*Ch()+Pc()%2; //DDL# 0..13
203 Int_t tmp=1+Pc()/2*8+PadPcY()/6; r=(Pc()%2)? tmp:25-tmp; //row r=1..24
204 d=1+PadPcX()/8; //DILOGIC# 1..10
205 // d=AliHMPIDRawStream::kNDILOGICAdd+1-d; ////flip according to Paolo (2-9-2008)
206 d=10+1-d; ////flip according to Paolo (2-9-2008)
207 a=y2a[PadPcY()%6]+6*(7-PadPcX()%8); //ADDRESS 0..47
210 if(r<1 || r>24 || d<1 || d>10 || a<0 || a>47) {w32=0;ddl=-1;r=-1;d=-1;a=-1; return;} //clm: the assert is removed not to break the reconstruction code
211 AliBitPacking::PackWord((UInt_t)fQ,w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
212 AliBitPacking::PackWord( a ,w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
213 AliBitPacking::PackWord( d ,w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
214 AliBitPacking::PackWord( r ,w32,22,26); // Row number bits (22..26) counts (1..24)
215 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
217 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
218 Bool_t AliHMPIDDigit::Set(Int_t ch,Int_t pc,Int_t px,Int_t py,Int_t tid)
220 // Manual creation of digit
221 // Arguments: ch,pc,px,py,qdc,tid
222 // Returns: kTRUE if wrong digit
223 if(ch<AliHMPIDParam::kMinCh || ch>AliHMPIDParam::kMaxCh) return kTRUE;
224 if(pc<AliHMPIDParam::kMinPc || pc>AliHMPIDParam::kMaxPc) return kTRUE;
225 if(px<AliHMPIDParam::kMinPx || px>AliHMPIDParam::kMaxPx) return kTRUE;
226 if(py<AliHMPIDParam::kMinPy || py>AliHMPIDParam::kMaxPy) return kTRUE;
229 fPad=AliHMPIDParam::Abs(ch,pc,px,py);fTracks[0]=tid;
233 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++