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HMPIDAna.C removed as all functionality now in AliHMPIDSelector.C
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.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
16//////////////////////////////////////////////////////////////////////////
17// //
18// AliHMPIDRecon //
19// //
20// HMPID class to perfom pattern recognition based on Hough transfrom //
21// for single chamber //
22//////////////////////////////////////////////////////////////////////////
23
24#include "AliHMPIDRecon.h" //class header
25#include "AliHMPIDCluster.h" //CkovAngle()
26#include <TRotation.h> //TracePhoton()
27#include <TH1D.h> //HoughResponse()
28#include <TClonesArray.h> //CkovAngle()
29
30#include <TTree.h> //Display()
31#include <TFile.h> //Display()
32#include <AliESD.h> //Display()
33#include <TPolyMarker.h> //Display()
34#include <TLatex.h> //Display()
35#include <TCanvas.h> //Display()
36
37
38const Double_t AliHMPIDRecon::fgkRadThick=1.5;
39const Double_t AliHMPIDRecon::fgkWinThick=0.5;
40const Double_t AliHMPIDRecon::fgkGapThick=8.0;
41const Double_t AliHMPIDRecon::fgkRadIdx =1.292;
42const Double_t AliHMPIDRecon::fgkWinIdx =1.5787;
43const Double_t AliHMPIDRecon::fgkGapIdx =1.0005;
44
45
46//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
47AliHMPIDRecon::AliHMPIDRecon():TTask("RichRec","RichPat"),
48 fPhotCnt(-1),
49 fCkovSigma2(0),
50 fIsWEIGHT(kFALSE),
51 fDTheta(0.001),
52 fWindowWidth(0.045),
53 fTrkDir(TVector3(0,0,1)),fTrkPos(TVector2(30,40))
54{
55// main ctor
56 for (Int_t i=0; i<3000; i++) {
57 fPhotFlag[i] = 0;
58 fPhotCkov[i] = -1;
59 fPhotPhi [i] = -1;
60 fPhotWei [i] = 0;
61 }
62}
63//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
64Double_t AliHMPIDRecon::CkovAngle(TClonesArray *pCluLst,Int_t &iNaccepted)
65{
66// Pattern recognition method based on Hough transform
67// Arguments: pCluLst - list of clusters for this chamber
68// Returns: - track ckov angle, [rad],
69
70 if(pCluLst->GetEntries()>200) fIsWEIGHT = kTRUE; // offset to take into account bkg in reconstruction
71 else fIsWEIGHT = kFALSE;
72
73 // Photon Flag: Flag = 0 initial set; Flag = 1 good candidate (charge compatible with photon); Flag = 2 photon used for the ring;
74
75 fPhotCnt=0;
76 for (Int_t iClu=0; iClu<pCluLst->GetEntriesFast();iClu++){//clusters loop
77 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluLst->UncheckedAt(iClu); //get pointer to current cluster
78 if(pClu->Q()>100) continue; //avoid MIP clusters from bkg
79
80 fPhotCkov[fPhotCnt]=FindPhotCkov(pClu->X(),pClu->Y()); //find ckov angle for this photon candidate
81 fPhotCnt++; //increment counter of photon candidates
82 }//clusters loop
83
84 iNaccepted=FlagPhot(HoughResponse()); //flag photons according to individual theta ckov with respect to most probable track theta ckov
85 if(iNaccepted<1) return -11;
86 else return FindRingCkov(pCluLst->GetEntries()); //find best Theta ckov for ring i.e. track
87}//ThetaCerenkov()
88//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
89Double_t AliHMPIDRecon::FindPhotCkov(Double_t cluX,Double_t cluY)
90{
91// Finds Cerenkov angle for this photon candidate
92// Arguments: cluX,cluY - position of cadidate's cluster
93// Returns: Cerenkov angle
94
95 TVector2 pos(cluX,cluY); Double_t cluR=(pos-fTrkPos).Mod(); Double_t phi=FindPhotPhi(cluX,cluY);
d3da6dc4 96 Double_t ckov1=0,ckov2=0.75;
97 const Double_t kTol=0.05;
98 Int_t iIterCnt = 0;
99 while(1){
100 if(iIterCnt>=50) return -1;
101 Double_t ckov=0.5*(ckov1+ckov2);
102 Double_t dist=cluR-TracePhot(ckov,phi,pos); iIterCnt++; //get distance between trial point and cluster position
d3da6dc4 103 if (dist> kTol) ckov1=ckov; //cluster @ larger ckov
104 else if(dist<-kTol) ckov2=ckov; //cluster @ smaller ckov
105 else return ckov; //precision achived
106 }
107}//FindPhotTheta()
108//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
109Double_t AliHMPIDRecon::FindPhotPhi(Double_t cluX,Double_t cluY)
110{
111// Finds phi angle og photon candidate by considering the cluster's position of this candudate w.r.t track position
112
113 Double_t emiss=0;
114 return fPhotPhi[fPhotCnt]=TMath::ATan2(cluY-fTrkPos.Y()-emiss*TMath::Tan(fTrkDir.Theta())*TMath::Sin(fTrkDir.Phi()),
115 cluX-fTrkPos.X()-emiss*TMath::Tan(fTrkDir.Theta())*TMath::Cos(fTrkDir.Phi()));
116}
117//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
118Double_t AliHMPIDRecon::FindRingArea(Double_t ckovAng)const
119{
120// Find area inside the cerenkov ring which lays inside PCs
121// Arguments: ckovThe - cernkov
122// Returns: area of the ring in cm^2 for given theta ckov
123
124
125 TVector2 pos1,pos2;
126
127 const Int_t kN=100;
128 Double_t area=0;
129 for(Int_t i=0;i<kN;i++){
130 TracePhot(ckovAng,Double_t(TMath::TwoPi()*i /kN),pos1);//trace this photon
131 TracePhot(ckovAng,Double_t(TMath::TwoPi()*(i+1)/kN),pos2);//trace this photon
132 area+=(pos1-fTrkPos)*(pos2-fTrkPos);
133
134 }
135 return area;
136}//FindRingArea()
137//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
138Double_t AliHMPIDRecon::FindRingCkov(Int_t)
139{
140// Loops on all Ckov candidates and estimates the best Theta Ckov for a ring formed by those candidates. Also estimates an error for that Theat Ckov
141// collecting errors for all single Ckov candidates thetas. (Assuming they are independent)
142// Arguments: iNclus- total number of clusters in chamber for background estimation
143// Return: best estimation of track Theta ckov
144
145 Double_t wei = 0.;
146 Double_t weightThetaCerenkov = 0.;
147
148 Double_t ckovMin=9999.,ckovMax=0.;
149 Double_t sigma2 = 0; //to collect error squared for this ring
150
151 for(Int_t i=0;i<fPhotCnt;i++){//candidates loop
152 if(fPhotFlag[i] == 2){
153 if(fPhotCkov[i]<ckovMin) ckovMin=fPhotCkov[i]; //find max and min Theta ckov from all candidates within probable window
154 if(fPhotCkov[i]>ckovMax) ckovMax=fPhotCkov[i];
155 weightThetaCerenkov += fPhotCkov[i]*fPhotWei[i]; wei += fPhotWei[i]; //collect weight as sum of all candidate weghts
156
157 //Double_t phiref=(GetPhiPoint()-GetTrackPhi());
158 if(fPhotCkov[i]<=0) continue;//?????????????????Flag photos = 2 may imply CkovEta = 0??????????????
159
160 sigma2 += 1./Sigma2(fPhotCkov[i],fPhotPhi[i]);
161 }
162 }//candidates loop
163
164 if(sigma2>0) fCkovSigma2=1./sigma2;
165 else fCkovSigma2=1e10;
166
167
168 if(wei != 0.) weightThetaCerenkov /= wei; else weightThetaCerenkov = 0.;
169 return weightThetaCerenkov;
170}//FindCkovRing()
171//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
172Int_t AliHMPIDRecon::FlagPhot(Double_t ckov)
173{
174// Flag photon candidates if their individual ckov angle is inside the window around ckov angle returned by HoughResponse()
175// Arguments: ckov- value of most probable ckov angle for track as returned by HoughResponse()
176// Returns: number of photon candidates happened to be inside the window
177
178
179 Int_t steps = (Int_t)((ckov )/ fDTheta); //how many times we need to have fDTheta to fill the distance between 0 and thetaCkovHough
180
181 Double_t tmin = (Double_t)(steps - 1)*fDTheta;
182 Double_t tmax = (Double_t)(steps)*fDTheta;
183 Double_t tavg = 0.5*(tmin+tmax);
184
185 tmin = tavg - 0.5*fWindowWidth; tmax = tavg + 0.5*fWindowWidth;
186
187 Int_t iInsideCnt = 0; //count photons which Theta ckov inside the window
188 for(Int_t i=0;i<fPhotCnt;i++){//photon candidates loop
189 if(fPhotCkov[i] >= tmin && fPhotCkov[i] <= tmax) {
190 fPhotFlag[i]=2;
191 iInsideCnt++;
192 }
193 }
194 return iInsideCnt;
195}//FlagPhot()
196//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
197Double_t AliHMPIDRecon::TracePhot(Double_t ckovThe,Double_t ckovPhi,TVector2 &pos)const
198{
199// Trace a single Ckov photon from emission point somewhere in radiator up to photocathode taking into account ref indexes of materials it travereses
200// Arguments: ckovThe,ckovPhi- photon ckov angles, [rad] (warning: not photon theta and phi)
201// Returns: distance between photon point on PC and track projection
202 TRotation mtheta; mtheta.RotateY(fTrkDir.Theta());
203 TRotation mphi; mphi.RotateZ(fTrkDir.Phi());
204 TRotation mrot=mphi*mtheta;
205
206 TVector3 posCkov(fTrkPos.X(),fTrkPos.Y(),-0.5*fgkRadThick-fgkWinThick-fgkGapThick); //RAD: photon position is track position @ middle of RAD
207 TVector3 dirCkov; dirCkov.SetMagThetaPhi(1,ckovThe,ckovPhi); //initially photon is directed according to requested ckov angle
208 dirCkov=mrot*dirCkov; //now we know photon direction in LORS
209 dirCkov.SetPhi(ckovPhi);
210 if(dirCkov.Theta() > TMath::ASin(1./fgkRadIdx)) return -999;//total refraction on WIN-GAP boundary
211
212 Propagate(dirCkov,posCkov,-fgkWinThick-fgkGapThick); //go to RAD-WIN boundary remeber that z=0 is PC plane
213 Refract (dirCkov, fgkRadIdx,fgkWinIdx ); //RAD-WIN refraction
214 Propagate(dirCkov,posCkov,-fgkGapThick ); //go to WIN-GAP boundary
215 Refract (dirCkov, fgkWinIdx,fgkGapIdx ); //WIN-GAP refraction
216 Propagate(dirCkov,posCkov,0 ); //go to PC
217
218 pos.Set(posCkov.X(),posCkov.Y());
219 return (pos-fTrkPos).Mod();
220}//TracePhoton()
221//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
222void AliHMPIDRecon::Propagate(const TVector3 &dir,TVector3 &pos,Double_t z)const
223{
224// Finds an intersection point between a line and XY plane shifted along Z.
225// Arguments: dir,pos - vector along the line and any point of the line
226// z - z coordinate of plain
227// Returns: none
228// On exit: pos is the position if this intesection if any
229 static TVector3 nrm(0,0,1);
230 TVector3 pnt(0,0,z);
231
232 TVector3 diff=pnt-pos;
233 Double_t sint=(nrm*diff)/(nrm*dir);
234 pos+=sint*dir;
235}//Propagate()
236//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
237void AliHMPIDRecon::Refract(TVector3 &dir,Double_t n1,Double_t n2)const
238{
239// Refract direction vector according to Snell law
240// Arguments:
241// n1 - ref idx of first substance
242// n2 - ref idx of second substance
243// Returns: none
244// On exit: dir is new direction
245 Double_t sinref=(n1/n2)*TMath::Sin(dir.Theta());
246 if(sinref>1.) dir.SetXYZ(-999,-999,-999);
247 else dir.SetTheta(TMath::ASin(sinref));
248}//Refract()
249//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
250Double_t AliHMPIDRecon::HoughResponse()
251{
252//
253//
254//
255 Double_t kThetaMax=0.75;
256 Int_t nChannels = (Int_t)(kThetaMax/fDTheta+0.5);
257 TH1D *phots = new TH1D("Rphot" ,"phots" ,nChannels,0,kThetaMax);
258 TH1D *photsw = new TH1D("RphotWeighted" ,"photsw" ,nChannels,0,kThetaMax);
259 TH1D *resultw = new TH1D("resultw","resultw" ,nChannels,0,kThetaMax);
260 Int_t nBin = (Int_t)(kThetaMax/fDTheta);
261 Int_t nCorrBand = (Int_t)(fWindowWidth/(2*fDTheta));
262
263 for (Int_t i=0; i< fPhotCnt; i++){//photon cadidates loop
264 Double_t angle = fPhotCkov[i]; if(angle<0||angle>kThetaMax) continue;
265 phots->Fill(angle);
266 Int_t bin = (Int_t)(0.5+angle/(fDTheta));
267 Double_t weight=1.;
268 if(fIsWEIGHT){
269 Double_t lowerlimit = ((Double_t)bin)*fDTheta - 0.5*fDTheta; Double_t upperlimit = ((Double_t)bin)*fDTheta + 0.5*fDTheta;
270 Double_t diffArea = FindRingArea(upperlimit)-FindRingArea(lowerlimit);
271 if(diffArea>0) weight = 1./diffArea;
272 }
273 photsw->Fill(angle,weight);
274 fPhotWei[i]=weight;
275 }//photon candidates loop
276
277 for (Int_t i=1; i<=nBin;i++){
278 Int_t bin1= i-nCorrBand;
279 Int_t bin2= i+nCorrBand;
280 if(bin1<1) bin1=1;
281 if(bin2>nBin)bin2=nBin;
282 Double_t sumPhots=phots->Integral(bin1,bin2);
283 if(sumPhots<3) continue; // if less then 3 photons don't trust to this ring
284 Double_t sumPhotsw=photsw->Integral(bin1,bin2);
285 resultw->Fill((Double_t)((i+0.5)*fDTheta),sumPhotsw);
286 }
287// evaluate the "BEST" theta ckov as the maximum value of histogramm
288 Double_t *pVec = resultw->GetArray();
289 Int_t locMax = TMath::LocMax(nBin,pVec);
290 phots->Delete();photsw->Delete();resultw->Delete(); // Reset and delete objects
291
292 return (Double_t)(locMax*fDTheta+0.5*fDTheta); //final most probable track theta ckov
293}//HoughResponse()
294//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
295Double_t AliHMPIDRecon::Sigma2(Double_t ckovTh, Double_t ckovPh)const
296{
297// Analithical calculation of total error (as a sum of localization, geometrical and chromatic errors) on Cerenkov angle for a given Cerenkov photon
298// created by a given MIP. Fromulae according to CERN-EP-2000-058
299// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
300// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
301// MIP beta
302// Returns: absolute error on Cerenkov angle, [radians]
303
304 TVector3 v(-999,-999,-999);
305 Double_t trkBeta = 1./(TMath::Cos(ckovTh)*fgkRadIdx);
306
307 v.SetX(SigLoc (ckovTh,ckovPh,trkBeta));
308 v.SetY(SigGeom(ckovTh,ckovPh,trkBeta));
309 v.SetZ(SigCrom(ckovTh,ckovPh,trkBeta));
310
311 return v.Mag2();
312}
313//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
314Double_t AliHMPIDRecon::SigLoc(Double_t thetaC, Double_t phiC,Double_t betaM)const
315{
316// Analithical calculation of localization error (due to finite segmentation of PC) on Cerenkov angle for a given Cerenkov photon
317// created by a given MIP. Fromulae according to CERN-EP-2000-058
318// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
319// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
320// MIP beta
321// Returns: absolute error on Cerenkov angle, [radians]
322 Double_t phiDelta = phiC - fTrkDir.Phi();
323
324 Double_t alpha =TMath::Cos(fTrkDir.Theta())-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(fTrkDir.Theta());
325 Double_t k = 1.-fgkRadIdx*fgkRadIdx+alpha*alpha/(betaM*betaM);
326 if (k<0) return 1e10;
327
328 Double_t mu =TMath::Sin(fTrkDir.Theta())*TMath::Sin(fTrkDir.Phi())+TMath::Tan(thetaC)*(TMath::Cos(fTrkDir.Theta())*TMath::Cos(phiDelta)*TMath::Sin(fTrkDir.Phi())+TMath::Sin(phiDelta)*TMath::Cos(fTrkDir.Phi()));
329 Double_t e =TMath::Sin(fTrkDir.Theta())*TMath::Cos(fTrkDir.Phi())+TMath::Tan(thetaC)*(TMath::Cos(fTrkDir.Theta())*TMath::Cos(phiDelta)*TMath::Cos(fTrkDir.Phi())-TMath::Sin(phiDelta)*TMath::Sin(fTrkDir.Phi()));
330
331 Double_t kk = betaM*TMath::Sqrt(k)/(8*alpha);
332 Double_t dtdxc = kk*(k*(TMath::Cos(phiDelta)*TMath::Cos(fTrkDir.Phi())-TMath::Cos(fTrkDir.Theta())*TMath::Sin(phiDelta)*TMath::Sin(fTrkDir.Phi()))-(alpha*mu/(betaM*betaM))*TMath::Sin(fTrkDir.Theta())*TMath::Sin(phiDelta));
333 Double_t dtdyc = kk*(k*(TMath::Cos(phiDelta)*TMath::Sin(fTrkDir.Phi())+TMath::Cos(fTrkDir.Theta())*TMath::Sin(phiDelta)*TMath::Cos(fTrkDir.Phi()))+(alpha* e/(betaM*betaM))*TMath::Sin(fTrkDir.Theta())*TMath::Sin(phiDelta));
334
335 return TMath::Sqrt(0.2*0.2*dtdxc*dtdxc + 0.25*0.25*dtdyc*dtdyc);
336}
337//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
338Double_t AliHMPIDRecon::SigCrom(Double_t thetaC, Double_t phiC,Double_t betaM)const
339{
340// Analithical calculation of chromatic error (due to lack of knowledge of Cerenkov photon energy) on Cerenkov angle for a given Cerenkov photon
341// created by a given MIP. Fromulae according to CERN-EP-2000-058
342// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
343// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
344// MIP beta
345// Returns: absolute error on Cerenkov angle, [radians]
346 Double_t phiDelta = phiC - fTrkDir.Phi();
347 Double_t alpha =TMath::Cos(fTrkDir.Theta())-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(fTrkDir.Theta());
348
349 Double_t dtdn = TMath::Cos(fTrkDir.Theta())*fgkRadIdx*betaM*betaM/(alpha*TMath::Tan(thetaC));
350
351 Double_t f = 0.00928*(7.75-5.635)/TMath::Sqrt(12.);
352
353 return f*dtdn;
354}//SigCrom()
355//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
356Double_t AliHMPIDRecon::SigGeom(Double_t thetaC, Double_t phiC,Double_t betaM)const
357{
358// Analithical calculation of geometric error (due to lack of knowledge of creation point in radiator) on Cerenkov angle for a given Cerenkov photon
359// created by a given MIP. Formulae according to CERN-EP-2000-058
360// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
361// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
362// MIP beta
363// Returns: absolute error on Cerenkov angle, [radians]
364
365 Double_t phiDelta = phiC - fTrkDir.Phi();
366 Double_t alpha =TMath::Cos(fTrkDir.Theta())-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(fTrkDir.Theta());
367
368 Double_t k = 1.-fgkRadIdx*fgkRadIdx+alpha*alpha/(betaM*betaM);
369 if (k<0) return 1e10;
370
371 Double_t eTr = 0.5*1.5*betaM*TMath::Sqrt(k)/(8*alpha);
372 Double_t lambda = 1.-TMath::Sin(fTrkDir.Theta())*TMath::Sin(fTrkDir.Theta())*TMath::Sin(phiC)*TMath::Sin(phiC);
373
374 Double_t c = 1./(1.+ eTr*k/(alpha*alpha*TMath::Cos(thetaC)*TMath::Cos(thetaC)));
375 Double_t i = betaM*TMath::Tan(thetaC)*lambda*TMath::Power(k,1.5);
376 Double_t ii = 1.+eTr*betaM*i;
377
378 Double_t err = c * (i/(alpha*alpha*8) + ii*(1.-lambda) / ( alpha*alpha*8*betaM*(1.+eTr)) );
379 Double_t trErr = 1.5/(TMath::Sqrt(12.)*TMath::Cos(fTrkDir.Theta()));
380
381 return trErr*err;
382}//SigGeom()
383//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
384void AliHMPIDRecon::Display()
385{
386// Display digits, reconstructed tracks intersections and HMPID rings if available
387// Arguments: none
388// Returns: none
389 TFile *pEsdFl=TFile::Open("AliESDs.root"); if(!pEsdFl || !pEsdFl->IsOpen()) return;//open AliESDs.root
390 TTree *pEsdTr=(TTree*) pEsdFl->Get("esdTree"); if(!pEsdTr) return;//get ESD tree
391
392 AliESD *pEsd=new AliESD; pEsdTr->SetBranchAddress("ESD", &pEsd);
393
394 TPolyMarker *pDigMap[7]; //digits map
395 TPolyMarker *pTrkMap[7]; Int_t aTrkCnt[7]; //TRKxPC intersection map
396
397 for(Int_t i=0;i<7;i++){
398 pDigMap[i]=new TPolyMarker(); pDigMap[i]->SetMarkerStyle(25); pDigMap[i]->SetMarkerSize(0.5); pDigMap[i]->SetMarkerColor(kGreen);
399 aTrkCnt[i]=0; pTrkMap[i]=new TPolyMarker(); pTrkMap[i]->SetMarkerStyle(4); pTrkMap[i]->SetMarkerSize(0.5); pTrkMap[i]->SetMarkerColor(kRed);
400 }
401
402 AliHMPIDRecon rec;
403
404 TLatex t;
405 TCanvas *pC = new TCanvas("HMPIDDisplay","HMPID Display",0,0,1226,900); pC->Divide(3,3);
406
407 for(Int_t iEvt=0;iEvt<pEsdTr->GetEntries();iEvt++) { //events loop
408 pC->cd(3); t.DrawText(0.2,0.4,Form("Event %i",iEvt)); //print current event number
409 pEsdTr->GetEntry(iEvt); //get ESD for this event
410 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){//ESD tracks loop
411 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //
412 Float_t th,ph,x,y; pTrk->GetHMPIDtrk(x,y,th,ph); if(x<0) continue;
cf7e313e 413 Int_t ch=pTrk->GetHMPIDcluIdx()/1000000;
d3da6dc4 414 pTrkMap[ch]->SetPoint(aTrkCnt[ch]++,x,y);
415 }//ESD tracks loop
416
417// al->GetEvent(iEvt); rl->TreeD()->GetEntry(0); //get digits list
418 for(Int_t iCh=0;iCh<7;iCh++) {//chambers loop
419// for(Int_t iDig=0;iDig < r->DigLst(iCh)->GetEntries();iDig++) { //digits loop
420// AliHMPIDDigit *pDig = (AliHMPIDDigit*)r->DigLst(iCh)->At(iDig);
421// pDigMap[iCh]->SetPoint(iDig,pDig->LorsX(),pDig->LorsY());
422// } //digits loop
423//
424//
425 if(iCh==6) pC->cd(1); if(iCh==5) pC->cd(2);
426 if(iCh==4) pC->cd(4); if(iCh==3) pC->cd(5); if(iCh==2) pC->cd(6);
427 if(iCh==1) pC->cd(8); if(iCh==0) pC->cd(9);
428
429 AliHMPIDDigit::DrawPc(); pTrkMap[iCh]->Draw(); pDigMap[iCh]->Draw();
430 }//chambers loop
431// pC->Update();
432// pC->Modified();
433// if(iEvt<iEvtTo) {gPad->WaitPrimitive();pC->Clear();}
434
435
436
437 }//events loop
438 delete pEsd; pEsdFl->Close();//close AliESDs.root
439// rl->UnloadDigits();
440}//Display()