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[u/mrichter/AliRoot.git] / HMPID / AliHMPIDDigit.h
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d3da6dc4 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#include <AliDigit.h> //base class
7#include <TMath.h> //Mathieson()
8#include <TRandom.h> //IsOverTh()
9#include <AliBitPacking.h> //Raw()
3c6274c1 10#include "AliHMPIDHit.h" //Hit2Sdi(), ctor()
d3da6dc4 11
d3da6dc4 12class TClonesArray; //Hit2Sdi()
3c6274c1 13
d3da6dc4 14class AliHMPIDDigit :public AliDigit //TObject-AliDigit-AliHMPIDDigit
15{
16public:
17 enum EAbsPad {kChAbs=100000000,kPcAbs=1000000,kPadAbsX=1000,kPadAbsY=1}; //absolute pad number structure
da08475b 18 enum ERawData{kNddls=14}; //RAW data structure
19 enum EPadData{kPcX=2,kPcY=3,kPadPcX=80,kPadPcY=48,kPadAllX=kPadPcX*kPcX,kPadAllY=kPadPcY*kPcY,kPcAll=kPcX*kPcY,kPadAll=kPadAllX*kPadAllY}; //Segmentation structure
d3da6dc4 20//ctor&dtor
3c6274c1 21 AliHMPIDDigit( ):AliDigit( ),fPad(Abs(-1,-1,-1,-1)),fQ(-1) {} //default ctor
22 AliHMPIDDigit(Int_t pad,Int_t q,Int_t *t ):AliDigit(t),fPad(pad ),fQ(q ) {} //ctor used in digitizer
23 virtual ~AliHMPIDDigit( ) {} //dtor
d3da6dc4 24//framework part
25 Bool_t IsSortable ( )const{return kTRUE;} //provision to use TObject::Sort()
26 inline Int_t Compare (const TObject *pObj )const; //provision to use TObject::Sort()
27 void Print (Option_t *opt="" )const; //TObject::Print() overloaded
28//private part
29 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
30 static Int_t A2C (Int_t pad ) {return pad/kChAbs; } //abs pad -> chamber
31 static Int_t A2P (Int_t pad ) {return pad%kChAbs/kPcAbs; } //abs pad -> pc
32 static Int_t A2X (Int_t pad ) {return pad%kPcAbs/kPadAbsX; } //abs pad -> pad X
33 static Int_t A2Y (Int_t pad ) {return pad%kPadAbsX; } //abs pad -> pad Y
da08475b 34 Int_t Addr ( )const{Int_t map[6]={5,3,1,0,2,4};return map[A2Y(fPad)%6]+6*(A2X(fPad)%8);}//ADDRESS 0..47
d3da6dc4 35 void AddTidOffset(Int_t offset ) {for (Int_t i=0; i<3; i++) if (fTracks[i]>0) fTracks[i]+=offset;}; //needed for merging
36 Int_t Ch ( )const{return A2C(fPad); } //chamber number
da08475b 37 Int_t Dilogic ( )const{return 1+PadPcX()/8; } //DILOGIC# 1..10
d3da6dc4 38 static void DrawPc (Bool_t isFill=kTRUE ); //draw PCs
da08475b 39 static void DrawSeg ( ); //draw segmentation
40 void DrawZoom ( );
41 Int_t DdlIdx ( )const{return 2*Ch()+Pc()%2; } //DDL# 0..13
42 Int_t DdlId ( )const{return (6<<8)+DdlIdx(); } //DDL ID 0x600..0x60d
3c6274c1 43 static void Hit2Sdi (AliHMPIDHit *pHit,TClonesArray*); //hit -> 9 sdigits
da08475b 44 static Bool_t IsOverTh (Float_t q ) {return q > 6; } //is digit over threshold????
45 static Bool_t IsInside (Float_t x,Float_t y ) {return x>0&&y>0&&x<SizeAllX()&&y<SizeAllY(); } //is point inside pc boundary?
46 inline static Bool_t IsInDead (Float_t x,Float_t y ); //is point in dead area?
47 Float_t LorsX ( )const{return (PadPcX()+0.5)*SizePadX()+(Pc()%2)*(SizePcX()+SizeDead());} //center of the pad x, [cm]
48 Float_t LorsY ( )const{return (PadPcY()+0.5)*SizePadY()+(Pc()/2)*(SizePcY()+SizeDead());} //center of the pad y, [cm]
3c6274c1 49 void Manual1 (Int_t c,Float_t x,Float_t y,Int_t q=33){AliHMPIDHit h(c,q,x,y); Set(&h,0);} //manual creation
50 void Manual2 (Int_t c,Int_t p,Int_t x,Int_t y) {fPad=Abs(c,p,x,y);} //manual creation
d3da6dc4 51 inline Float_t Mathieson (Float_t x,Float_t y )const; //Mathieson distribution
3c6274c1 52 Int_t PadPcX ( )const{return A2X(fPad);} //pad pc x # 0..79
53 Int_t PadPcY ( )const{return A2Y(fPad);} //pad pc y # 0..47
54 Int_t PadChX ( )const{return (Pc()%2)*kPadPcX+PadPcX();} //pad ch x # 0..159
55 Int_t PadChY ( )const{return (Pc()/2)*kPadPcY+PadPcY();} //pad ch y # 0..143
d3da6dc4 56 Int_t Pad ( )const{return fPad;} //absolute id of this pad
d3da6dc4 57 Int_t Pc ( )const{return A2P(fPad);} //PC position number
58 static void PrintSize ( ); //print all segmentation sizes
da08475b 59 Float_t Q ( )const{return fQ;} //charge, [QDC]
60 inline Int_t Raw ( UInt_t &raw32 )const; //digit->(ddl,raw32)
61 inline void Raw (Int_t l,UInt_t raw32 ); //(ddl,raw32)->digit
62 static Int_t Raw2Ch (UInt_t l ) {return l/2;} //ch=f(ddl)
63 static Int_t Raw2Pc (UInt_t l,UInt_t r ) {r=(r-1)/8;return (l%2)?5-2*r:2*r;} //pc=f(ddl,r)
64 static Int_t Raw2X ( UInt_t d,UInt_t a ) { return (d-1)*8+a/6;} //padx=f(d,a)
65 static Int_t Raw2Y (UInt_t l,UInt_t r,UInt_t a ) {Int_t a2y[6]={3,2,4,1,5,0};r=(l%2)?(24-r):r-1;return 6*(r%8)+a2y[a%6];}//pady=f(ddl,r,a)
66 Int_t Row ( )const{Int_t r=1+Pc()/2*8+PadPcY()/6; return (Pc()%2)? 25-r:r;} //row r=1..24
3c6274c1 67 inline Bool_t Set (AliHMPIDHit *pHit,Int_t pad ); //sdigit from hit in given pad
d3da6dc4 68
69 static Float_t SizeAllX ( ) {return SizePadX()*kPadAllX+SizeDead();} //all PCs size x, [cm]
70 static Float_t SizeAllY ( ) {return SizePadY()*kPadAllY+2*SizeDead();} //all PCs size y, [cm]
71 static Float_t SizeArea ( ) {return SizePcX()*SizePcY()*kPcAll;} //sence area, [cm^2]
72 static Float_t SizeDead ( ) {return 2.6;} //dead zone size x, [cm]
73 static Float_t SizeGap ( ) {return 8; }
74 static Float_t SizePadX ( ) {return 0.8;} //pad size x, [cm]
75 static Float_t SizePadY ( ) {return 0.84;} //pad size y, [cm]
76 static Float_t SizePcX ( ) {return SizePadX()*kPadPcX;} //PC size x, [cm]
77 static Float_t SizePcY ( ) {return SizePadY()*kPadPcY;} //PC size y, [cm]
da08475b 78 static Float_t SizeWin ( ) {return 0.5;} //Quartz window width
79 static Float_t SizeRad ( ) {return 1.5;} //Rad width
80 static void Test ( ); //Test conversions
d3da6dc4 81protected: //AliDigit has fTracks[3]
3c6274c1 82 Int_t fPad; //absolute pad number
da08475b 83 Float_t fQ; //QDC value, fractions are permitted for summable procedure
d3da6dc4 84 ClassDef(AliHMPIDDigit,4) //HMPID digit class
85};//class AliHMPIDDigitN
cf7e313e 86
87typedef AliHMPIDDigit AliRICHDigit; // for backward compatibility
88
d3da6dc4 89//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3c6274c1 90Bool_t AliHMPIDDigit::Set(AliHMPIDHit *pHit,Int_t pad)
d3da6dc4 91{
3c6274c1 92// Creates digit
93// Arguments: pHit- pointer to the hit
94// pad - for which pad to create
d3da6dc4 95// Returns: none
d3da6dc4 96
3c6274c1 97 fPad=Abs(-1,-1,-1,-1); fQ=-1; //reset
98 Int_t pc,px,py;
99 Float_t x=pHit->LorsX(),y=pHit->LorsY();
100
101 if (x>= 0 && x<= SizePcX() ) {pc=0; px=Int_t( x / SizePadX());}//PC 0 or 2 or 4
102 else if(x>=SizePcX()+SizeDead() && x<= SizeAllX() ) {pc=1; px=Int_t((x- SizePcX()- SizeDead()) / SizePadX());}//PC 2 or 4 or 6
103 else return kFALSE;
104 if (y>= 0 && y<= SizePcY() ) { py=Int_t( y / SizePadY());}//PC 0 or 1
105 else if(y>=SizePcY()+SizeDead() && y<=2*SizePcY()+SizeDead() ) {pc+=2;py=Int_t((y- SizePcY()- SizeDead()) / SizePadY());}//PC 2 or 3
106 else if(y>=SizeAllY()-SizePcY() && y<= SizeAllY() ) {pc+=4;py=Int_t((y-2*SizePcY()-2*SizeDead()) / SizePadY());}//PC 4 or 5
107 else return kFALSE;
108
109 switch(pad){
110 case 8: px--;py++;break; case 1:py++;break; case 2:px++; py++;break;
d3da6dc4 111
3c6274c1 112 case 7: px--; break; case 0: break; case 3:px++; break;
d3da6dc4 113
3c6274c1 114 case 6: px--;py--;break; case 5:py--;break; case 4:px++; py--;break;
d3da6dc4 115 }
3c6274c1 116 if(px<0 || px>=kPadPcX) return kFALSE;
117 if(py<0 || py>=kPadPcY) return kFALSE;
118 fPad=Abs(pHit->Ch(),pc,px,py);
119 fQ=pHit->Q()*Mathieson(x,y);
120 fTracks[0]=pHit->Tid();
121 return kTRUE;
122}//Set()
d3da6dc4 123//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
124Int_t AliHMPIDDigit::Compare(const TObject *pObj) const
125{
126// 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.
127// This feature is used in digitizer to facilitate finding of sdigits for the same pad since they all will come together after sorting.
128// Arguments: pObj - pointer to object to compare with
129// Retunrs: -1 if AbsPad less then in pObj, 1 if more and 0 if they are the same
130 if (fPad==((AliHMPIDDigit*)pObj)->Pad()) return 0;
131 else if(fPad >((AliHMPIDDigit*)pObj)->Pad()) return 1;
da08475b 132 else return -1;
d3da6dc4 133}
134//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
135Bool_t AliHMPIDDigit::IsInDead(Float_t x,Float_t y)
136{
137// Check is the current point is outside of sensitive area or in dead zones
138// Arguments: x,y -position
139// Returns: 1 if not in sensitive zone
140 if(x<0 || x>SizeAllX() || y<0 || y>SizeAllY()) return kTRUE; //out of pc
141
142 if(x>SizePcX() && x<SizePcX()+SizeDead()) return kTRUE; //in dead zone along x
143
144 if(y>SizePcY() && y<SizePcY()+SizeDead()) return kTRUE; //in first dead zone along y
145 if(y>SizeAllY()-SizePcY()-SizeDead() && y<SizeAllY()-SizePcY()) return kTRUE; //in second dead zone along y
146 return kFALSE;
147}
148//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
149Float_t AliHMPIDDigit::Mathieson(Float_t x,Float_t y)const
150{
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
154 const Float_t kSqrtK3=0.77459667,k2=0.962,k4=0.379;
155
156 Float_t ux1=kSqrtK3*TMath::TanH(k2*(x-LorsX()+0.5*SizePadX())/0.425);
157 Float_t ux2=kSqrtK3*TMath::TanH(k2*(x-LorsX()-0.5*SizePadX())/0.425);
158 Float_t uy1=kSqrtK3*TMath::TanH(k2*(y-LorsY()+0.5*SizePadY())/0.425);
159 Float_t uy2=kSqrtK3*TMath::TanH(k2*(y-LorsY()-0.5*SizePadY())/0.425);
160 return 4*k4*(TMath::ATan(ux2)-TMath::ATan(ux1))*k4*(TMath::ATan(uy2)-TMath::ATan(uy1));
161}
162//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
163Int_t AliHMPIDDigit::Raw(UInt_t &w32)const
164{
165// Convert digit structure to raw word format
166// Arguments: 32 bits raw word to fill
167// Returns: DDL ID where to write this digit
168 w32=0;
169 AliBitPacking::PackWord((UInt_t)fQ ,w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
170 AliBitPacking::PackWord( Addr() ,w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
171 AliBitPacking::PackWord( Dilogic(),w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
172 AliBitPacking::PackWord( Row() ,w32,22,26); // Row number bits (22..26) counts (1..24)
da08475b 173 return DdlIdx(); //ddl 0..13 where to write this digit
d3da6dc4 174}
175//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
da08475b 176void AliHMPIDDigit::Raw(Int_t ddl,UInt_t w32)
d3da6dc4 177{
178// Converts a given raw data word to a digit
179// Arguments: w32 - 32 bits raw data word
180// ddl - DDL idx 0 1 2 3 4 ... 13
181// Returns: none
182 fQ = AliBitPacking::UnpackWord(w32, 0,11); // 0000 0rrr rrdd ddaa aaaa qqqq qqqq qqqq Qdc bits (00..11) counts (0..4095)
183 UInt_t a = AliBitPacking::UnpackWord(w32,12,17); // 3322 2222 2222 1111 1111 1000 0000 0000 DILOGIC address bits (12..17) counts (0..47)
184 UInt_t d = AliBitPacking::UnpackWord(w32,18,21); // 1098 7654 3210 9876 5432 1098 7654 3210 DILOGIC number bits (18..21) counts (1..10)
185 UInt_t r = AliBitPacking::UnpackWord(w32,22,26); // Row number bits (22..26) counts (1..24)
da08475b 186 fPad=Abs(Raw2Ch(ddl),Raw2Pc(ddl,r),Raw2X(d,a),Raw2Y(ddl,r,a));
d3da6dc4 187}
188//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
189#endif