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8265fa96 | 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 | ||
8265fa96 | 16 | |
17 | #include "AliRICHClusterFinder.h" | |
543d5224 | 18 | #include "AliRICHMap.h" |
9d6f9427 | 19 | #include <TMinuit.h> |
ed3ceb24 | 20 | #include <TParticle.h> |
9d6f9427 | 21 | #include <TVector3.h> |
cbaf35fb | 22 | #include <AliLoader.h> |
ed3ceb24 | 23 | #include <AliStack.h> |
cbaf35fb | 24 | #include <AliRun.h> |
8265fa96 | 25 | |
9d6f9427 | 26 | void RICHMinMathieson(Int_t &npar, Double_t *gin, Double_t &chi2, Double_t *par, Int_t iflag); |
8265fa96 | 27 | |
28 | ClassImp(AliRICHClusterFinder) | |
543d5224 | 29 | //__________________________________________________________________________________________________ |
30 | AliRICHClusterFinder::AliRICHClusterFinder(AliRICH *pRICH) | |
31 | {//main ctor | |
998b831f | 32 | fRICH = pRICH; |
33 | AliDebug(1,"main ctor Start."); | |
543d5224 | 34 | |
e42a7b46 | 35 | fDigitMap = 0; |
6865fb8d | 36 | fRawCluster.Reset(); |
37 | fResolvedCluster.Reset(); | |
998b831f | 38 | AliDebug(1,"main ctor Stop."); |
543d5224 | 39 | }//main ctor |
40 | //__________________________________________________________________________________________________ | |
543d5224 | 41 | void AliRICHClusterFinder::Exec() |
237c933d | 42 | { |
e42a7b46 | 43 | //Main method of cluster finder. Loops on events and chambers, everything else is done in FindClusters() |
998b831f | 44 | AliDebug(1,"Exec Start."); |
e42a7b46 | 45 | |
46 | R()->GetLoader() ->LoadDigits(); | |
998b831f | 47 | // R()->GetLoader()->GetRunLoader()->LoadHeader(); |
48 | R()->GetLoader()->GetRunLoader()->LoadKinematics(); //header is already loaded | |
ed3ceb24 | 49 | |
543d5224 | 50 | for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop |
998b831f | 51 | AliDebug(1,Form("Processing event %i...",iEventN)); |
e42a7b46 | 52 | R()->GetLoader()->GetRunLoader()->GetEvent(iEventN); |
237c933d | 53 | |
e42a7b46 | 54 | R()->GetLoader()->MakeTree("R"); R()->MakeBranch("R"); |
55 | R()->ResetDigits(); R()->ResetClusters(); | |
543d5224 | 56 | |
e42a7b46 | 57 | R()->GetLoader()->TreeD()->GetEntry(0); |
998b831f | 58 | for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){//chambers loop |
ed3ceb24 | 59 | FindClusters(iChamber); |
543d5224 | 60 | }//chambers loop |
e42a7b46 | 61 | R()->GetLoader()->TreeR()->Fill(); R()->GetLoader()->WriteRecPoints("OVERWRITE");//write out clusters for current event |
543d5224 | 62 | }//events loop |
ed3ceb24 | 63 | |
e42a7b46 | 64 | R()->ResetDigits();//reset and unload everything |
65 | R()->ResetClusters(); | |
66 | R()->GetLoader() ->UnloadDigits(); | |
67 | R()->GetLoader() ->UnloadRecPoints(); | |
998b831f | 68 | // R()->GetLoader()->GetRunLoader()->UnloadHeader(); |
e42a7b46 | 69 | R()->GetLoader()->GetRunLoader()->UnloadKinematics(); |
ed3ceb24 | 70 | |
998b831f | 71 | AliDebug(1,"Stop."); |
543d5224 | 72 | }//Exec() |
73 | //__________________________________________________________________________________________________ | |
ed3ceb24 | 74 | void AliRICHClusterFinder::FindClusters(Int_t iChamber) |
75 | { | |
e42a7b46 | 76 | //Loops on digits for a given chamber, forms raw clusters, then tries to resolve them if requested |
77 | Int_t iNdigits=R()->Digits(iChamber)->GetEntriesFast(); | |
998b831f | 78 | AliDebug(1,Form("Start for chamber %i with %i digits.",iChamber,iNdigits)); |
e42a7b46 | 79 | |
80 | if(iNdigits==0)return;//no digits for a given chamber, nothing to do | |
cbaf35fb | 81 | |
e42a7b46 | 82 | fDigitMap=new AliRICHMap(R()->Digits(iChamber));//create digit map for the given chamber |
cbaf35fb | 83 | |
e42a7b46 | 84 | for(Int_t iDigN=0;iDigN<iNdigits;iDigN++){//digits loop for a given chamber |
85 | AliRICHdigit *dig=(AliRICHdigit*)R()->Digits(iChamber)->At(iDigN); | |
cbaf35fb | 86 | Int_t i=dig->X(); Int_t j=dig->Y(); |
e42a7b46 | 87 | if(fDigitMap->TestHit(i,j)==kUsed) continue;//this digit is already taken, go after next digit |
cbaf35fb | 88 | |
e42a7b46 | 89 | FormRawCluster(i,j);//form raw cluster starting from (i,j) pad |
998b831f | 90 | AliDebug(1,"After FormRawCluster:");ToAliDebug(1,fRawCluster.Print()); |
e42a7b46 | 91 | FindLocalMaxima(); //find number of local maxima and initial center of gravity |
998b831f | 92 | AliDebug(1,"After FindLocalMaxima:");ToAliDebug(1,fRawCluster.Print()); |
6865fb8d | 93 | |
e42a7b46 | 94 | if(AliRICHParam::IsResolveClusters()&&fRawCluster.Size()>1&&fRawCluster.Size()<6){ |
95 | FitCoG(); //serialization of resolved clusters will happen inside | |
96 | }else{//cluster size=1 or resolving is switched off | |
97 | WriteRawCluster();//simply output the formed raw cluster without deconvolution | |
ed3ceb24 | 98 | } |
e42a7b46 | 99 | fRawCluster.Reset(); fResolvedCluster.Reset(); |
100 | }//digits loop for a given chamber | |
cbaf35fb | 101 | |
e42a7b46 | 102 | delete fDigitMap; |
cbaf35fb | 103 | |
998b831f | 104 | AliDebug(1,"Stop."); |
ed3ceb24 | 105 | }//FindClusters() |
106 | //__________________________________________________________________________________________________ | |
6865fb8d | 107 | void AliRICHClusterFinder::FindClusterContribs(AliRICHcluster *pCluster) |
ed3ceb24 | 108 | { |
e42a7b46 | 109 | //Finds cerenkov-feedback-mip mixture for a given cluster |
998b831f | 110 | AliDebug(1,"Start.");ToAliDebug(1,pCluster->Print()); |
e0b2e10c | 111 | |
1cb5a97c | 112 | // R()->GetLoader()->GetRunLoader()->LoadHeader(); |
e0b2e10c | 113 | AliStack *pStack = R()->GetLoader()->GetRunLoader()->Stack(); |
114 | if(!pStack) | |
115 | {AliInfo("No Stack found!!! No contrib to cluster found.");return;} | |
ed3ceb24 | 116 | |
6865fb8d | 117 | TObjArray *pDigits = pCluster->Digits(); |
e42a7b46 | 118 | if(!pDigits) return; //?????????? |
ed3ceb24 | 119 | Int_t iNmips=0,iNckovs=0,iNfeeds=0; |
6865fb8d | 120 | TArrayI contribs(3*pCluster->Size()); |
121 | Int_t *pindex = new Int_t[3*pCluster->Size()]; | |
122 | for(Int_t iDigN=0;iDigN<pCluster->Size();iDigN++) {//loop on digits of a given cluster | |
e42a7b46 | 123 | contribs[3*iDigN] =((AliRICHdigit*)pDigits->At(iDigN))->GetTrack(0); |
89924db8 | 124 | if (contribs[3*iDigN] >= 10000000) contribs[3*iDigN] = 0; |
e42a7b46 | 125 | contribs[3*iDigN+1]=((AliRICHdigit*)pDigits->At(iDigN))->GetTrack(1); |
89924db8 | 126 | if (contribs[3*iDigN+1] >= 10000000) contribs[3*iDigN+1] = 0; |
e42a7b46 | 127 | contribs[3*iDigN+2]=((AliRICHdigit*)pDigits->At(iDigN))->GetTrack(2); |
89924db8 | 128 | if (contribs[3*iDigN+2] >= 10000000) contribs[3*iDigN+2] = 0; |
ed3ceb24 | 129 | }//loop on digits of a given cluster |
130 | TMath::Sort(contribs.GetSize(),contribs.GetArray(),pindex); | |
e42a7b46 | 131 | for(Int_t iDigN=0;iDigN<3*pCluster->Size()-1;iDigN++) {//loop on digits to sort tids |
998b831f | 132 | AliDebug(1,Form("%4i for digit n. %4i",contribs[pindex[iDigN]],iDigN)); |
ed3ceb24 | 133 | if(contribs[pindex[iDigN]]!=contribs[pindex[iDigN+1]]) { |
e0b2e10c | 134 | TParticle* particle = pStack->Particle(contribs[pindex[iDigN]]); |
89924db8 | 135 | Int_t code = particle->GetPdgCode(); |
136 | Double_t charge = 0; | |
e42a7b46 | 137 | if(particle->GetPDG()) charge=particle->GetPDG()->Charge(); |
998b831f | 138 | AliDebug(1,Form(" charge of particle %f",charge)); |
ed3ceb24 | 139 | |
140 | if(code==50000050) iNckovs++; | |
e42a7b46 | 141 | if(code==50000051) iNfeeds++; |
142 | if(charge!=0) iNmips++; | |
ed3ceb24 | 143 | } |
144 | }//loop on digits to sort Tid | |
e42a7b46 | 145 | |
146 | if (contribs[pindex[3*pCluster->Size()-1]]!=kBad) { | |
147 | ||
e0b2e10c | 148 | TParticle* particle = pStack->Particle(contribs[pindex[3*pCluster->Size()-1]]); |
e42a7b46 | 149 | Int_t code = particle->GetPdgCode(); |
150 | Double_t charge = 0; | |
151 | if(particle->GetPDG()) charge=particle->GetPDG()->Charge(); | |
998b831f | 152 | AliDebug(1,Form(" charge of particle %f",charge)); |
e42a7b46 | 153 | if(code==50000050) iNckovs++; |
154 | if(code==50000051) iNfeeds++; | |
155 | if(charge!=0) iNmips++; | |
156 | } | |
157 | ||
158 | pCluster->CFM(iNckovs,iNfeeds,iNmips); | |
159 | // | |
ed3ceb24 | 160 | delete [] pindex; |
998b831f | 161 | ToAliDebug(1,pCluster->Print()); |
162 | AliDebug(1,"Stop."); | |
3582c1f9 | 163 | }//FindClusterContribs() |
cbaf35fb | 164 | //__________________________________________________________________________________________________ |
9d6f9427 | 165 | void AliRICHClusterFinder::FormRawCluster(Int_t i, Int_t j) |
ed3ceb24 | 166 | { |
e42a7b46 | 167 | //Builds the raw cluster (before deconvolution). Starts from the first pad (i,j) then calls itself recursevly for all neighbours. |
998b831f | 168 | AliDebug(1,Form("Start with digit(%i,%i) Q=%f",i,j,((AliRICHdigit*)fDigitMap->GetHit(i,j))->Q())); |
cbaf35fb | 169 | |
e42a7b46 | 170 | fRawCluster.AddDigit((AliRICHdigit*) fDigitMap->GetHit(i,j));//take this pad in cluster |
171 | fDigitMap->FlagHit(i,j);//flag this pad as taken | |
cbaf35fb | 172 | |
173 | Int_t listX[4], listY[4]; // Now look recursively for all neighbours | |
e42a7b46 | 174 | for (Int_t iNei=0;iNei<R()->P()->PadNeighbours(i,j,listX,listY);iNei++) |
175 | if(fDigitMap->TestHit(listX[iNei],listY[iNei])==kUnused) FormRawCluster(listX[iNei],listY[iNei]); | |
3582c1f9 | 176 | }//FormRawCluster() |
cbaf35fb | 177 | //__________________________________________________________________________________________________ |
e42a7b46 | 178 | void AliRICHClusterFinder::FindLocalMaxima() |
179 | { | |
180 | //find number of local maxima in the current raw cluster and then calculates initial center of gravity | |
181 | fNlocals=0; | |
182 | for(Int_t iDig1=0;iDig1<fRawCluster.Size();iDig1++) { | |
183 | Int_t iNotMax = 0; | |
184 | AliRICHdigit *pDig1 = (AliRICHdigit *)fRawCluster.Digits()->At(iDig1); | |
185 | TVector pad1 = pDig1->Pad(); | |
186 | Int_t padQ1 = (Int_t)(pDig1->Q()+0.1); | |
187 | Int_t padC1 = pDig1->ChFbMi(); | |
188 | for(Int_t iDig2=0;iDig2<fRawCluster.Size();iDig2++) { | |
189 | AliRICHdigit *pDig2 = (AliRICHdigit *)fRawCluster.Digits()->At(iDig2); | |
190 | TVector pad2 = pDig2->Pad(); | |
191 | Int_t padQ2 = (Int_t)(pDig2->Q()+0.1); | |
192 | if(iDig1==iDig2) continue; | |
193 | Int_t diffx = TMath::Sign(Int_t(pad1[0]-pad2[0]),1); | |
194 | Int_t diffy = TMath::Sign(Int_t(pad1[1]-pad2[1]),1); | |
195 | if((diffx+diffy)<=1) { | |
196 | if(padQ2>=padQ1) iNotMax++; | |
197 | } | |
198 | } | |
199 | if(iNotMax==0) { | |
200 | TVector2 x2=AliRICHParam::Pad2Loc(pad1); | |
201 | fLocalX[fNlocals]=x2.X();fLocalY[fNlocals]=x2.Y(); | |
202 | fLocalQ[fNlocals] = (Double_t)padQ1; | |
203 | fLocalC[fNlocals] = padC1; | |
204 | fNlocals++; | |
205 | } | |
206 | } | |
207 | fRawCluster.CoG(fNlocals); //first initial approximation of the CoG...to start minimization. | |
208 | }//FindLocalMaxima() | |
cbaf35fb | 209 | //__________________________________________________________________________________________________ |
9d6f9427 | 210 | void AliRICHClusterFinder::WriteRawCluster() |
6865fb8d | 211 | { |
e42a7b46 | 212 | //Add the current raw cluster to the list of clusters |
998b831f | 213 | AliDebug(1,"Start."); |
cbaf35fb | 214 | |
e42a7b46 | 215 | FindClusterContribs(&fRawCluster); |
216 | R()->AddCluster(fRawCluster); | |
217 | ||
998b831f | 218 | ToAliDebug(1,fRawCluster.Print()); AliDebug(1,"Stop."); |
cbaf35fb | 219 | }//WriteRawCluster() |
220 | //__________________________________________________________________________________________________ | |
6865fb8d | 221 | void AliRICHClusterFinder::WriteResolvedCluster() |
222 | { | |
e42a7b46 | 223 | //Add the current resolved cluster to the list of clusters |
998b831f | 224 | AliDebug(1,"Start."); |
6865fb8d | 225 | |
e42a7b46 | 226 | FindClusterContribs(&fResolvedCluster); |
227 | R()->AddCluster(fResolvedCluster); | |
6865fb8d | 228 | |
998b831f | 229 | ToAliDebug(1,fResolvedCluster.Print()); AliDebug(1,"Stop."); |
6865fb8d | 230 | }//WriteResolvedCluster() |
231 | //__________________________________________________________________________________________________ | |
9d6f9427 | 232 | void AliRICHClusterFinder::FitCoG() |
e42a7b46 | 233 | { |
234 | //Fits cluster of size by the corresponding number of Mathieson shapes. | |
235 | //This methode is only invoked in case everything is ok to start deconvolution | |
998b831f | 236 | AliDebug(1,"Start with:"); ToAliDebug(1,fRawCluster.Print()); |
6865fb8d | 237 | |
0f72f306 | 238 | Double_t arglist; |
239 | Int_t ierflag = 0; | |
6865fb8d | 240 | |
6865fb8d | 241 | TMinuit *pMinuit = new TMinuit(3*fNlocals-1); |
0f72f306 | 242 | pMinuit->mninit(5,10,7); |
243 | ||
244 | arglist = -1; | |
245 | pMinuit->mnexcm("SET PRI",&arglist, 1, ierflag); | |
19dd5b2f | 246 | pMinuit->mnexcm("SET NOW",&arglist, 0, ierflag); |
9d6f9427 | 247 | |
9d6f9427 | 248 | TString chname; |
249 | Int_t ierflg; | |
250 | ||
251 | pMinuit->SetObjectFit((TObject*)this); | |
252 | pMinuit->SetFCN(RICHMinMathieson); | |
6865fb8d | 253 | |
254 | Double_t vstart,lower, upper; | |
255 | Double_t stepX= 0.001; | |
256 | Double_t stepY= 0.001; | |
257 | Double_t stepQ= 0.0001; | |
258 | ||
259 | for(Int_t i=0;i<fNlocals;i++) { | |
260 | vstart = fLocalX[i]; | |
261 | lower = vstart - 2*AliRICHParam::PadSizeX(); | |
262 | upper = vstart + 2*AliRICHParam::PadSizeX(); | |
263 | pMinuit->mnparm(3*i ,Form("xCoG %i",i),vstart,stepX,lower,upper,ierflag); | |
6865fb8d | 264 | vstart = fLocalY[i]; |
265 | lower = vstart - 2*AliRICHParam::PadSizeY(); | |
266 | upper = vstart + 2*AliRICHParam::PadSizeY(); | |
267 | pMinuit->mnparm(3*i+1,Form("yCoG %i",i),vstart,stepY,lower,upper,ierflag); | |
6865fb8d | 268 | if(i==fNlocals-1) break; // last parameter is constrained |
269 | vstart = fLocalQ[i]/fRawCluster.Q(); | |
270 | lower = 0; | |
271 | upper = 1; | |
272 | pMinuit->mnparm(3*i+2,Form("qfrac %i",i),vstart,stepQ,lower,upper,ierflag); | |
6865fb8d | 273 | } |
274 | ||
9d6f9427 | 275 | arglist = -1; |
9d6f9427 | 276 | pMinuit->mnexcm("SET NOGR",&arglist, 1, ierflag); |
9d6f9427 | 277 | arglist = 1; |
278 | pMinuit->mnexcm("SET ERR", &arglist, 1,ierflg); | |
279 | arglist = -1; | |
280 | pMinuit->mnexcm("SIMPLEX",&arglist, 0, ierflag); | |
281 | pMinuit->mnexcm("MIGRAD",&arglist, 0, ierflag); | |
6865fb8d | 282 | pMinuit->mnexcm("EXIT" ,&arglist, 0, ierflag); |
283 | ||
284 | Double_t xCoG[50],yCoG[50],qfracCoG[50]; | |
9d6f9427 | 285 | Double_t eps, b1, b2; |
6865fb8d | 286 | |
287 | Double_t qfraclast=0; | |
288 | for(Int_t i=0;i<fNlocals;i++) { | |
289 | pMinuit->mnpout(3*i ,chname, xCoG[i], eps , b1, b2, ierflg); | |
290 | pMinuit->mnpout(3*i+1,chname, yCoG[i], eps , b1, b2, ierflg); | |
291 | if(i==fNlocals-1) break; | |
292 | pMinuit->mnpout(3*i+2,chname, qfracCoG[i], eps , b1, b2, ierflg); | |
293 | qfraclast+=qfracCoG[i]; | |
294 | } | |
295 | qfracCoG[fNlocals-1] = 1 - qfraclast; | |
9d6f9427 | 296 | delete pMinuit; |
6865fb8d | 297 | |
e42a7b46 | 298 | for(Int_t i=0;i<fNlocals;i++){//resolved positions loop |
6865fb8d | 299 | fResolvedCluster.Fill(&fRawCluster,xCoG[i],yCoG[i],qfracCoG[i],fLocalC[i]); |
6865fb8d | 300 | WriteResolvedCluster(); |
301 | } | |
998b831f | 302 | AliDebug(1,"Stop."); |
09c52ebc | 303 | }//FitCoG() |
9d6f9427 | 304 | //__________________________________________________________________________________________________ |
6865fb8d | 305 | void RICHMinMathieson(Int_t &npar, Double_t *, Double_t &chi2, Double_t *par, Int_t ) |
09c52ebc | 306 | { |
e42a7b46 | 307 | //Mathieson minimization function |
9d6f9427 | 308 | |
6865fb8d | 309 | AliRICHcluster *pRawCluster = ((AliRICHClusterFinder*)gMinuit->GetObjectFit())->GetRawCluster(); |
9d6f9427 | 310 | |
3582c1f9 | 311 | TVector2 centroid[50]; |
6865fb8d | 312 | Double_t q[50]; |
313 | Int_t nFunctions = (npar+1)/3; | |
314 | Double_t qfract = 0; | |
315 | for(Int_t i=0;i<nFunctions;i++) { | |
3582c1f9 | 316 | centroid[i].Set(par[3*i],par[3*i+1]); |
6865fb8d | 317 | if(i==nFunctions-1) break; |
318 | q[i]=par[3*i+2]; | |
319 | qfract+=q[i]; | |
320 | } | |
321 | q[nFunctions-1] = 1 - qfract; | |
322 | ||
9d6f9427 | 323 | chi2 = 0; |
324 | Int_t qtot = pRawCluster->Q(); | |
325 | for(Int_t i=0;i<pRawCluster->Size();i++) { | |
e42a7b46 | 326 | TVector pad=((AliRICHdigit *)pRawCluster->Digits()->At(i))->Pad(); |
9d6f9427 | 327 | Double_t padQ = ((AliRICHdigit *)pRawCluster->Digits()->At(i))->Q(); |
6865fb8d | 328 | Double_t qfracpar=0; |
329 | for(Int_t j=0;j<nFunctions;j++) { | |
e42a7b46 | 330 | qfracpar += q[j]*AliRICHParam::FracQdc(centroid[j],pad); |
9d6f9427 | 331 | } |
6865fb8d | 332 | chi2 += TMath::Power((qtot*qfracpar-padQ),2)/padQ; |
6865fb8d | 333 | } |
9d6f9427 | 334 | }//RICHMinMathieson() |
e42a7b46 | 335 | //__________________________________________________________________________________________________ |