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[u/mrichter/AliRoot.git] / HMPID / HMPIDbase / AliHMPIDDigit.h
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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 */
5
6// Class of HMPID to manage digits ---> pads
7//.
8//.
9//.
10
11#include <AliDigit.h> //base class
12#include <AliRawReader.h>
13#include <AliLog.h>
14#include "TMath.h" //Mathieson()
15#include <AliBitPacking.h> //Raw()
16#include "AliHMPIDParam.h"
17//#include "AliHMPIDRawStream.h"
18
19class TClonesArray; //Hit2Sdi()
20
21class AliHMPIDDigit :public AliDigit //TObject-AliDigit-AliHMPIDDigit
22{
23public:
24
25//ctor&dtor
26AliHMPIDDigit():
27 AliDigit( ),
28 fPad(AliHMPIDParam::Abs(-1,-1,-1,-1)),
29 fQ(-1)
30 {} //default ctor
31//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32AliHMPIDDigit(Int_t pad,Int_t q,Int_t *t):
33 AliDigit(t),
34 fPad(pad),
35 fQ(q)
36 {if(fQ>4095) fQ=4095;} //digit ctor
37//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
38AliHMPIDDigit(Int_t pad,Int_t q):
39 AliDigit( ),
40 fPad(pad),
41 fQ(q )
42 {if(fQ>4095) fQ=4095;} //digit ctor
43//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
44AliHMPIDDigit& operator=(const AliHMPIDDigit& d)
45{
46 //
47 // Assignment operator
48 //
49 if(this!=&d){
50 AliDigit::operator=(d);
51 fPad = d.fPad;
52 fQ = d.fQ;
53 }
54 return *this;
55}
56//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
57AliHMPIDDigit(const AliHMPIDDigit &d):
58 AliDigit(d),
59 fPad(d.fPad),
60 fQ(d.fQ)
61 {} //copy ctor
62//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
63virtual ~AliHMPIDDigit() {} //dtor
64
65//framework part
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
70//private part
71
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
74
75 Float_t LorsX ( )const{return AliHMPIDParam::LorsX(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2X(fPad)); } //center of the pad x, [cm]
76
77 Float_t LorsY ( )const{return AliHMPIDParam::LorsY(AliHMPIDParam::A2P(fPad),AliHMPIDParam::A2Y(fPad)); } //center of the pad y, [cm]
78//
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
95
96protected: //AliDigit has fTracks[3]
97
98
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
103
104//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
105
106Int_t AliHMPIDDigit::Compare(const TObject *pObj) const
107{
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;
114 else return -1;
115}
116//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
117
118Double_t AliHMPIDDigit::MathiesonX(Double_t x)const
119{
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
124
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;
130 return mathi;
131}
132//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
133
134Double_t AliHMPIDDigit::MathiesonY(Double_t y)const
135{
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
140
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;
146 return mathi;
147}
148//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
149
150Double_t AliHMPIDDigit::IntPartMathiX(Double_t x)const
151{
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();
158
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());
161
162 return AliHMPIDParam::K4x()*(TMath::ATan(ux2)-TMath::ATan(ux1));
163}
164//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
165
166Double_t AliHMPIDDigit::IntPartMathiY(Double_t y)const
167{
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();
174
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());
177
178 return AliHMPIDParam::K4y()*(TMath::ATan(uy2)-TMath::ATan(uy1));
179
180}
181//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
182
183Double_t AliHMPIDDigit::IntMathieson(Double_t x,Double_t y)const
184{
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
189
190 Double_t xm = IntPartMathiX(x);
191 Double_t ym = IntPartMathiY(y);
192 return 4*xm*ym;
193}
194//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
195void AliHMPIDDigit::Raw(UInt_t &w32,Int_t &ddl,Int_t &r,Int_t &d,Int_t &a)const
196{
197// Convert digit structure to raw word format
198// Arguments: w32,ddl,r,d,a where to write the results
199// Returns: none
200 Int_t y2a[6]={5,3,1,0,2,4};
201
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
208
209 w32=0;
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
216}
217//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
218Bool_t AliHMPIDDigit::Set(Int_t ch,Int_t pc,Int_t px,Int_t py,Int_t tid)
219{
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;
227
228
229 fPad=AliHMPIDParam::Abs(ch,pc,px,py);fTracks[0]=tid;
230 fQ=0;
231 return kFALSE;
232}
233//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
234
235#endif