area of Mathieson parametrized; hit ctor change eloss to qdc; Helix removed
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDParam.cxx
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d3da6dc4 1// **************************************************************************
2// * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3// * *
4// * Author: The ALICE Off-line Project. *
5// * Contributors are mentioned in the code where appropriate. *
6// * *
7// * Permission to use, copy, modify and distribute this software and its *
8// * documentation strictly for non-commercial purposes is hereby granted *
9// * without fee, provided that the above copyright notice appears in all *
10// * copies and that both the copyright notice and this permission notice *
11// * appear in the supporting documentation. The authors make no claims *
12// * about the suitability of this software for any purpose. It is *
13// * provided "as is" without express or implied warranty. *
14// **************************************************************************
15#include "AliHMPIDParam.h" //class header
16#include "AliHMPIDDigit.h" //ctor
17#include <TCanvas.h> //TestXXX()
18#include <TLatex.h> //TestTrans()
19#include <TView.h> //TestTrans()
20#include <TPolyMarker3D.h> //TestTrans()
21#include <TRotation.h>
22#include <AliRunLoader.h> //Stack()
23#include <AliStack.h> //Stack()
24#include <TParticle.h> //Stack()
25#include "AliHMPIDHelix.h" //TestTrans()
26
27ClassImp(AliHMPIDParam)
28
29AliHMPIDParam* AliHMPIDParam::fgInstance=0x0; //singleton pointer
30//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
31AliHMPIDParam::AliHMPIDParam():TNamed("RichParam","default version")
32{
33// Here all the intitializition is taken place when AliHMPIDParam::Instance() is invoked for the first time.
34// In particulare, matrices to be used for LORS<->MARS trasnformations are initialized from TGeo structure.
35// Note that TGeoManager should be already initialized from geometry.root file
36 fX=0.5*AliHMPIDDigit::SizeAllX();
37 fY=0.5*AliHMPIDDigit::SizeAllY();
1d4857c5 38 for(Int_t i=0;i<7;i++)
39 if(gGeoManager)
40 fM[i]=(TGeoHMatrix*)gGeoManager->GetVolume("ALIC")->GetNode(Form("HMPID_%i",i))->GetMatrix();
41 else{
42 fM[i]=new TGeoHMatrix;
43 IdealPosition(i,fM[i]);
44 }
d3da6dc4 45 fgInstance=this;
46}//ctor
47//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
48void AliHMPIDParam::Print(Option_t* opt) const
49{
50// print some usefull (hopefully) info on some internal guts of HMPID parametrisation
51
52 for(Int_t i=0;i<7;i++) fM[i]->Print(opt);
53}//Print()
54//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1d4857c5 55void AliHMPIDParam::IdealPosition(Int_t iCh, TGeoHMatrix *pMatrix)
56{
57// Construct ideal position matrix for a given chamber
58// Arguments: iCh- chamber ID; pMatrix- pointer to precreated unity matrix where to store the results
59// Returns: none
60 const Double_t kAngHor=19.5; // horizontal angle between chambers 19.5 grad
61 const Double_t kAngVer=20; // vertical angle between chambers 20 grad
62 const Double_t kAngCom=30; // common HMPID rotation with respect to x axis 30 grad
63 const Double_t trans[3]={490,0,0}; //center of the chamber is on window-gap surface
64 pMatrix->RotateY(90); //rotate around y since initial position is in XY plane -> now in YZ plane
65 pMatrix->SetTranslation(trans); //now plane in YZ is shifted along x
66 switch(iCh){
67 case 0: pMatrix->RotateY(kAngHor); pMatrix->RotateZ(-kAngVer); break; //right and down
68 case 1: pMatrix->RotateZ(-kAngVer); break; //down
69 case 2: pMatrix->RotateY(kAngHor); break; //right
70 case 3: break; //no rotation
71 case 4: pMatrix->RotateY(-kAngHor); break; //left
72 case 5: pMatrix->RotateZ(kAngVer); break; //up
73 case 6: pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer); break; //left and up
74 }
75 pMatrix->RotateZ(kAngCom); //apply common rotation in XY plane
76
77}
78//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
d3da6dc4 79Int_t AliHMPIDParam::Stack(Int_t evt,Int_t tid)
80{
d1bf51e1 81// Prints some useful info from stack
d3da6dc4 82// Arguments: evt - event number. if not -1 print info only for that event
83// tid - track id. if not -1 then print it and all it's mothers if any
84// Returns: mother tid of the given tid if any
85 AliRunLoader *pAL=AliRunLoader::Open();
86 if(pAL->LoadHeader()) return -1;
87 if(pAL->LoadKinematics()) return -1;
88
89 Int_t mtid=-1;
cf7e313e 90 Int_t iNevt=pAL->GetNumberOfEvents();
d3da6dc4 91
92 for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
93 if(evt!=-1 && evt!=iEvt) continue; //in case one needs to print the requested event, ignore all others
94 pAL->GetEvent(iEvt);
95 AliStack *pStack=pAL->Stack();
96 if(tid==-1){ //print all tids for this event
97 for(Int_t i=0;i<pStack->GetNtrack();i++) pStack->Particle(i)->Print();
98 Printf("totally %i tracks including %i primaries for event %i out of %i event(s)",pStack->GetNtrack(),pStack->GetNprimary(),iEvt,iNevt);
99 }else{ //print only this tid and it;s mothers
100 if(tid<0 || tid>pStack->GetNtrack()) {Printf("Wrong tid, valid tid range for event %i is 0-%i",iEvt,pStack->GetNtrack());break;}
101 TParticle *pTrack=pStack->Particle(tid); mtid=pTrack->GetFirstMother();
102 TString str=pTrack->GetName();
103 while((tid=pTrack->GetFirstMother()) >= 0){
104 pTrack=pStack->Particle(tid);
105 str+=" from ";str+=pTrack->GetName();
106 }
d3da6dc4 107 }//if(tid==-1)
108 }//events loop
109 pAL->UnloadHeader(); pAL->UnloadKinematics();
110 return mtid;
111}
112//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
113Int_t AliHMPIDParam::StackCount(Int_t pid,Int_t evt)
114{
115// Counts total number of particles of given sort (including secondary) for a given event
116 AliRunLoader *pAL=AliRunLoader::Open();
117 pAL->GetEvent(evt);
118 if(pAL->LoadHeader()) return 0;
119 if(pAL->LoadKinematics()) return 0;
120 AliStack *pStack=pAL->Stack();
121
122 Int_t iCnt=0;
123 for(Int_t i=0;i<pStack->GetNtrack();i++) if(pStack->Particle(i)->GetPdgCode()==pid) iCnt++;
124
125 pAL->UnloadHeader(); pAL->UnloadKinematics();
126 return iCnt;
127}
128//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++