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[u/mrichter/AliRoot.git] / HMPID / AliHMPIDDigit.h
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
19 class TClonesArray;        //Hit2Sdi()
20   
21 class AliHMPIDDigit :public AliDigit //TObject-AliDigit-AliHMPIDDigit
22 {
23 public:
24     
25 //ctor&dtor    
26 AliHMPIDDigit():
27     AliDigit( ),
28     fPad(AliHMPIDParam::Abs(-1,-1,-1,-1)),
29     fQ(-1)  
30     {}                                       //default ctor
31 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 AliHMPIDDigit(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 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  
38 AliHMPIDDigit(Int_t pad,Int_t q):
39   AliDigit( ),
40   fPad(pad),
41   fQ(q )  
42   {if(fQ>4095) fQ=4095;}                     //digit ctor
43 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
44 AliHMPIDDigit& 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 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
57 AliHMPIDDigit(const AliHMPIDDigit &d):
58   AliDigit(d),
59   fPad(d.fPad),
60   fQ(d.fQ)         
61   {}                                        //copy ctor
62 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  
63 virtual ~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  
96 protected:                                                                   //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
106 Int_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
118 Double_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
134 Double_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
150 Double_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
166 Double_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
183 Double_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 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
195 void 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 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
218 Bool_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