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[u/mrichter/AliRoot.git] / RICH / AliRICHDigit.h
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0fe8fa07 1#ifndef AliRICHDigit_h
2#define AliRICHDigit_h
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
0422a446 6#include <AliDigit.h> //base class
e30ca504 7#include <TMath.h> //Mathieson()
8#include <TRandom.h> //IsOverTh()
9#include <AliBitPacking.h> //Raw()
0fe8fa07 10
e30ca504 11class AliRICHHit; //Hit2Sdi()
12class TClonesArray; //Hit2Sdi()
13
9de8d990 14class AliRICHDigit :public AliDigit //TObject-AliDigit-AliRICHDigit
0fe8fa07 15{
16public:
e30ca504 17 enum EAbsPad {kChAbs=100000000,kPcAbs=1000000,kPadAbsX=1000,kPadAbsY=1}; //absolute pad number structure
18 enum ERawData{kDilX=8,kDilY=6,kNdil=10,kNrow=24,kNddls=14}; //RAW data structure
19 enum EPadData{kPcX=2,kPcY=3,kPad1=0,kPadPcX=80,kPadPcY=48,kPadAllX=kPadPcX*kPcX,kPadAllY=kPadPcY*kPcY,kPcAll=kPcX*kPcY,kPadAll=kPadAllX*kPadAllY}; //Segmentation structure
20 enum EPadShif{kC=0,kU=1,kUR=2,kR=3,kDR=4,kD=5,kDL=6,kL=7,kUL=8};
db910db9 21//ctor&dtor
e30ca504 22 AliRICHDigit( ):AliDigit( ),fPad(Abs(-1,-1,-1,-1)),fQ(-1) {} //default ctor
23 AliRICHDigit(Int_t pad,Int_t q,Int_t *t ):AliDigit(t),fPad(pad ),fQ(q ) {} //digit ctor
24 inline AliRICHDigit(Int_t c,Float_t q,Int_t t,Float_t x,Float_t y,Int_t f=0); //sdigit ctor
25 virtual ~AliRICHDigit() {} //dtor
0422a446 26//framework part
e30ca504 27 Bool_t IsSortable ( )const{return kTRUE;} //provision to use TObject::Sort()
28 inline Int_t Compare (const TObject *pObj )const; //provision to use TObject::Sort()
29 void Print (Option_t *opt="" )const; //TObject::Print() overloaded
0fe8fa07 30//private part
e30ca504 31 static Int_t Abs (Int_t c,Int_t s,Int_t x,Int_t y) {return c*kChAbs+s*kPcAbs+x*kPadAbsX+y*kPadAbsY; } //(ch,pc,padx,pady)-> abs pad
32 static Int_t A2C (Int_t pad ) {return pad/kChAbs; } //abs pad -> chamber
33 static Int_t A2P (Int_t pad ) {return pad%kChAbs/kPcAbs; } //abs pad -> pc
34 static Int_t A2X (Int_t pad ) {return pad%kPcAbs/kPadAbsX; } //abs pad -> pad X
35 static Int_t A2Y (Int_t pad ) {return pad%kPadAbsX; } //abs pad -> pad Y
36 Int_t Addr ( )const{Int_t mapY2A[kDilY]={5,3,1,0,2,4}; return mapY2A[A2Y(fPad)%kDilY]+kDilY*(A2X(fPad)%kDilX);}//raw a=0..47
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 A2C(fPad); } //chamber number
39 Int_t Dilogic ( )const{return 10-PadX()/kDilX; } //raw d=1..10
40 static void DrawPc (Bool_t isFill=kTRUE ); //draw PCs
6df508f9 41 Int_t Ddl ( )const{return (PadX()<kPadPcX) ? 2*Ch() : 2*Ch()+1; } //DDL number 0..13
e30ca504 42 static Float_t Hit2Sdi (AliRICHHit *pHit,TClonesArray *); //hit -> 9 sdigits, returns total QDC
43 static Bool_t IsOverTh (Float_t q ) {return q > 6; } //is digit over threshold????
44 static Bool_t IsInside (Float_t x,Float_t y ) {return x>0&&y>0&&x<SizeAllX()&&y<SizeAllY(); } //is point inside pc boundary?
45 inline static Bool_t IsInDead (Float_t x,Float_t y ); //is point in dead area?
46 Float_t LorsX ( )const{return (PadX()+0.5)*SizePadX()+(Pc()%2)*(SizePcX()+SizeDead());} //center of the pad x, [cm]
47 Float_t LorsY ( )const{return (PadY()+0.5)*SizePadY()+(Pc()/2)*(SizePcY()+SizeDead());} //center of the pad y, [cm]
48 inline Float_t Mathieson (Float_t x,Float_t y )const; //Mathieson distribution
49 Int_t PadX ( )const{return A2X(fPad);} //x position of the pad
50 Int_t PadY ( )const{return A2Y(fPad);} //y postion of the pad
51 Int_t Pad ( )const{return fPad;} //absolute id of this pad
52 Float_t Q ( )const{return fQ;} //charge, [QDC]
53 Int_t Pc ( )const{return A2P(fPad);} //PC position number
54 static void PrintSize ( ); //print all segmentation sizes
55 inline Int_t Raw (UInt_t &w32 )const; //raw
56 Int_t Row ( )const{Int_t r=1+Pc()/2*8+PadY()/kDilY; return (Pc()%2)?kNrow-r+1:r;} //row r=1..24
57 void Set (Int_t c,Int_t s,Int_t x,Int_t y) {fPad=Abs(c,s,x,y);} //set new digit
58 void ReadRaw (Int_t ddl,Int_t r,Int_t d,Int_t a){Int_t mapA2Y[kDilY]={3,2,4,1,5,0};fPad=Abs(ddl/2,ddl%7,d*kDilX+a/kDilY,r*kDilY+mapA2Y[a%kDilY]);} //from raw
59 inline void ReadRaw (Int_t ddl,UInt_t w32 ); //read raw word
60
61 static Float_t SizeAllX ( ) {return SizePadX()*kPadAllX+SizeDead();} //all PCs size x, [cm]
62 static Float_t SizeAllY ( ) {return SizePadY()*kPadAllY+2*SizeDead();} //all PCs size y, [cm]
63 static Float_t SizeArea ( ) {return SizePcX()*SizePcY()*kPcAll;} //sence area, [cm^2]
64 static Float_t SizeDead ( ) {return 2.6;} //dead zone size x, [cm]
65 static Float_t SizeGap ( ) {return 8; }
66 static Float_t SizePadX ( ) {return 0.8;} //pad size x, [cm]
67 static Float_t SizePadY ( ) {return 0.84;} //pad size y, [cm]
68 static Float_t SizePcX ( ) {return SizePadX()*kPadPcX;} //PC size x, [cm]
69 static Float_t SizePcY ( ) {return SizePadY()*kPadPcY;} //PC size y, [cm]
70 static Float_t SizeWin ( ) {return 0.5;}
71 static Float_t SizeRad ( ) {return 1.5;}
72 static void TestSeg ( ); //test segmentation
73 void Zoom ( );
74protected: //AliDigit has fTracks[3]
75 Int_t fPad; //absolute pad number is chamber*kCham
76 Float_t fQ; //QDC value, fractions are permitted for summable procedure
77 ClassDef(AliRICHDigit,4) //RICH digit class
78};//class AliRICHDigitN
79//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
80AliRICHDigit::AliRICHDigit(Int_t c,Float_t q,Int_t t,Float_t x,Float_t y,Int_t flag):AliDigit(),fPad(Abs(-1,-1,-1,-1)),fQ(-1)
81{
82// Creation of sdigit
83// Arguments: c- chamber
84// q- total QDC
85// t -TID
86// x,y - hit position, LORS
87// Returns: none
88 Int_t pc,padx,pady;
89 if (x>= 0 && x<= SizePcX() ) {pc=0; padx=Int_t( x / SizePadX());}//PC 0 or 2 or 4
90 else if(x>=SizePcX()+SizeDead() && x<= SizeAllX() ) {pc=1; padx=Int_t((x- SizePcX()- SizeDead()) / SizePadX());}//PC 2 or 4 or 6
91 else return;
92 if (y>= 0 && y<= SizePcY() ) { pady=Int_t( y / SizePadY());}//PC 0 or 1
93 else if(y>=SizePcY()+SizeDead() && y<=2*SizePcY()+SizeDead() ) {pc+=2;pady=Int_t((y- SizePcY()- SizeDead()) / SizePadY());}//PC 2 or 3
94 else if(y>=SizeAllY()-SizePcY() && y<= SizeAllY() ) {pc+=4;pady=Int_t((y-2*SizePcY()-2*SizeDead()) / SizePadY());}//PC 4 or 5
95 else return;
96
97 switch(flag){
98 case kUL:padx--;pady++;break; case kU:pady++;break; case kUR:padx++; pady++;break;
99
100 case kL: padx--; break; case kC: break; case kR:padx++; break;
101
102 case kDL:padx--;pady--;break; case kD:pady--;break; case kDR:padx++; pady--;break;
103 }
104 if(padx<0 || padx>=kPadPcX) return;
105 if(pady<0 || pady>=kPadPcY) return;
106 fPad=Abs(c,pc,padx,pady);
107 fQ=q*Mathieson(x,y);
108 fTracks[0]=t;
109}
9de8d990 110//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
0422a446 111Int_t AliRICHDigit::Compare(const TObject *pObj) const
112{
9de8d990 113// 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.
114// This feature is used in digitizer to facilitate finding of sdigits for the same pad since they all will come together after sorting.
115// Arguments: pObj - pointer to object to compare with
116// Retunrs: -1 if AbsPad less then in pObj, 1 if more and 0 if they are the same
e30ca504 117 if (fPad==((AliRICHDigit*)pObj)->Pad()) return 0;
118 else if(fPad >((AliRICHDigit*)pObj)->Pad()) return 1;
119 else return -1;
0422a446 120}
9de8d990 121//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
e30ca504 122Bool_t AliRICHDigit::IsInDead(Float_t x,Float_t y)
0422a446 123{
e30ca504 124// Check is the current point is outside of sensitive area or in dead zones
125// Arguments: x,y -position
126// Returns: 1 if not in sensitive zone
127 if(x<0 || x>SizeAllX() || y<0 || y>SizeAllY()) return kTRUE; //out of pc
0422a446 128
e30ca504 129 if(x>SizePcX() && x<SizePcX()+SizeDead()) return kTRUE; //in dead zone along x
130
131 if(y>SizePcY() && y<SizePcY()+SizeDead()) return kTRUE; //in first dead zone along y
132 if(y>SizeAllY()-SizePcY()-SizeDead() && y<SizeAllY()-SizePcY()) return kTRUE; //in second dead zone along y
133 return kFALSE;
134}
9de8d990 135//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
e30ca504 136Float_t AliRICHDigit::Mathieson(Float_t x,Float_t y)const
137{
138// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
139// Arguments: x,y- position of the center of Mathieson distribution
140// Returns: a charge fraction [0-1] imposed into the pad
141 const Float_t kSqrtK3=0.77459667,k2=0.962,k4=0.379;
142
143 Float_t ux1=kSqrtK3*TMath::TanH(k2*(x-LorsX()+0.5*SizePadX())/0.425);
144 Float_t ux2=kSqrtK3*TMath::TanH(k2*(x-LorsX()-0.5*SizePadX())/0.425);
145 Float_t uy1=kSqrtK3*TMath::TanH(k2*(y-LorsY()+0.5*SizePadY())/0.425);
146 Float_t uy2=kSqrtK3*TMath::TanH(k2*(y-LorsY()-0.5*SizePadY())/0.425);
147 return 4*k4*(TMath::ATan(ux2)-TMath::ATan(ux1))*k4*(TMath::ATan(uy2)-TMath::ATan(uy1));
148}
149//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
150Int_t AliRICHDigit::Raw(UInt_t &w32)const
0422a446 151{
9de8d990 152// Convert digit structure to raw word format
153// Arguments: 32 bits raw word to fill
154// Returns: DDL ID where to write this digit
0422a446 155 w32=0;
e30ca504 156 AliBitPacking::PackWord((UInt_t)fQ ,w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
157 AliBitPacking::PackWord( Addr() ,w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
158 AliBitPacking::PackWord( Dilogic(),w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
159 AliBitPacking::PackWord( Row() ,w32,22,26); // Row number bits (22..26) counts (1..24)
9de8d990 160 return Ddl(); //ddl 0..13 where to write this digit
0422a446 161}
9de8d990 162//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
e30ca504 163void AliRICHDigit::ReadRaw(Int_t ddl,UInt_t w32)
db910db9 164{
e30ca504 165// Converts a given raw data word to a digit
166// Arguments: w32 - 32 bits raw data word
167// ddl - DDL idx 0 1 2 3 4 ... 13
168// Returns: none
169 fQ = AliBitPacking::UnpackWord(w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
170 UInt_t a = AliBitPacking::UnpackWord(w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
171 UInt_t d = AliBitPacking::UnpackWord(w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
172 UInt_t r = AliBitPacking::UnpackWord(w32,22,26); // Row number bits (22..26) counts (1..24)
173 ReadRaw(ddl,r,d,a);
174}
9de8d990 175//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
0fe8fa07 176#endif