#include "AliRICHClusterFinder.h"
-#include "AliRICH.h"
#include "AliRICHMap.h"
-#include "AliRICHParam.h"
+#include <TMinuit.h>
+#include <TParticle.h>
+#include <TVector3.h>
#include <AliLoader.h>
+#include <AliStack.h>
#include <AliRun.h>
+#include "AliRICHParam.h"
+void RICHMinMathieson(Int_t &npar, Double_t *gin, Double_t &chi2, Double_t *par, Int_t iflag);
ClassImp(AliRICHClusterFinder)
//__________________________________________________________________________________________________
-AliRICHClusterFinder::AliRICHClusterFinder(AliRICH *pRICH)
+AliRICHClusterFinder::AliRICHClusterFinder(AliRunLoader *pRunLoader)
{//main ctor
- Info("main ctor","Start.");
-
- fRICH = pRICH;
-
- fHitMap = 0;
+ fRICH = (AliRICH*) pRunLoader->GetAliRun()->GetDetector("RICH");
+
+ AliDebug(1,"main ctor Start.");
+ fDigitMap = 0;
+ fRawCluster.Reset();
+ fResolvedCluster.Reset();
+ AliDebug(1,"main ctor Stop.");
}//main ctor
//__________________________________________________________________________________________________
-void AliRICHClusterFinder::FindLocalMaxima(AliRICHcluster *pRawCluster)
-{// Split the cluster according to the number of maxima inside
- Info("SplitbyLocalMaxima","Start.");
- Int_t Nlocal = 0;
- Int_t localX[100],localY[100];
- for(Int_t iDig1=0;iDig1<pRawCluster->Size();iDig1++) {
- Int_t iNotMax = 0;
- AliRICHdigit *pDig1 = (AliRICHdigit *)pRawCluster->Digits()->At(iDig1);
- Int_t padX1 = pDig1->X();
- Int_t padY1 = pDig1->Y();
- Double_t padQ1 = pDig1->Q();
- for(Int_t iDig2=0;iDig2<pRawCluster->Size();iDig2++) {
- AliRICHdigit *pDig2 = (AliRICHdigit *)pRawCluster->Digits()->At(iDig2);
- Int_t padX2 = pDig2->X();
- Int_t padY2 = pDig2->Y();
- Double_t padQ2 = pDig2->Q();
- if(iDig1==iDig2) continue;
- Int_t diffx = TMath::Sign(padX1-padX2,1);
- Int_t diffy = TMath::Sign(padY1-padY2,1);
- if((diffx+diffy)<=1) {
- if(padQ2>padQ1) iNotMax++;
- }
- }
- if(iNotMax==0) {
- localX[Nlocal] = padX1;
- localY[Nlocal] = padY1;
- Nlocal++;
- }
- }
-}//FindLocalMaxima()
-//__________________________________________________________________________________________________
-void AliRICHClusterFinder::Exec()
+void AliRICHClusterFinder::Exec(const Option_t *)
{
- Info("Exec","Start.");
-
-
- Rich()->GetLoader()->LoadDigits();
-
+//Main method of cluster finder. Loops on events and chambers, everything else is done in FindClusters()
+ AliDebug(1,"Exec Start.");
+
+ R()->GetLoader() ->LoadDigits();
+// R()->GetLoader()->GetRunLoader()->LoadHeader();
+ if(!R()->GetLoader()->GetRunLoader()->TreeK()) R()->GetLoader()->GetRunLoader()->LoadKinematics();
+
for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop
- gAlice->GetRunLoader()->GetEvent(iEventN);
+ AliDebug(1,Form("Processing event %i...",iEventN));
+ R()->GetLoader()->GetRunLoader()->GetEvent(iEventN);
- Rich()->GetLoader()->MakeTree("R"); Rich()->MakeBranch("R");
- Rich()->ResetDigits(); Rich()->ResetClusters();
+ R()->GetLoader()->MakeTree("R"); R()->MakeBranch("R");
+ R()->DigitsReset(); R()->ClustersReset();
- Rich()->GetLoader()->TreeD()->GetEntry(0);
- for(Int_t iChamber=1;iChamber<=kNCH;iChamber++){//chambers loop
- FindRawClusters(iChamber);
-
+ R()->GetLoader()->TreeD()->GetEntry(0);
+ for(Int_t iChamber=1;iChamber<=kNchambers;iChamber++){//chambers loop
+ FindClusters(iChamber);
}//chambers loop
-
- Rich()->GetLoader()->TreeR()->Fill();
- Rich()->GetLoader()->WriteRecPoints("OVERWRITE");
+ R()->GetLoader()->TreeR()->Fill(); R()->GetLoader()->WriteRecPoints("OVERWRITE");//write out clusters for current event
}//events loop
- Rich()->GetLoader()->UnloadDigits(); Rich()->GetLoader()->UnloadRecPoints();
- Rich()->ResetDigits(); Rich()->ResetClusters();
- Info("Exec","Stop.");
+
+ R()->DigitsReset();//reset and unload everything
+ R()->ClustersReset();
+ R()->GetLoader() ->UnloadDigits();
+ R()->GetLoader() ->UnloadRecPoints();
+// R()->GetLoader()->GetRunLoader()->UnloadHeader();
+ R()->GetLoader()->GetRunLoader()->UnloadKinematics();
+
+ AliDebug(1,"Stop.");
}//Exec()
//__________________________________________________________________________________________________
-void AliRICHClusterFinder::FindRawClusters(Int_t iChamber)
-{//finds neighbours and fill the tree with raw clusters
- Int_t nDigits=Rich()->Digits(iChamber)->GetEntriesFast();
- Info("FindRawClusters","Start for Chamber %i with %i digits.",iChamber,nDigits);
- if(nDigits==0)return;
+void AliRICHClusterFinder::FindClusters(Int_t iChamber)
+{
+//Loops on digits for a given chamber, forms raw clusters, then tries to resolve them if requested
+ Int_t iNdigits=R()->Digits(iChamber)->GetEntriesFast();
+ AliDebug(1,Form("Start for chamber %i with %i digits.",iChamber,iNdigits));
+
+ if(iNdigits==0)return;//no digits for a given chamber, nothing to do
- fHitMap=new AliRICHMap(Rich()->Digits(iChamber));
+ fDigitMap=new AliRICHMap(R()->Digits(iChamber));//create digit map for the given chamber
- AliRICHcluster *pRawCluster;
-
- for(Int_t iDig=0;iDig<nDigits;iDig++){
- AliRICHdigit *dig=(AliRICHdigit*)Rich()->Digits(iChamber)->At(iDig);
+ for(Int_t iDigN=0;iDigN<iNdigits;iDigN++){//digits loop for a given chamber
+ AliRICHDigit *dig=(AliRICHDigit*)R()->Digits(iChamber)->At(iDigN);
Int_t i=dig->X(); Int_t j=dig->Y();
- if(fHitMap->TestHit(i,j)==kUsed) continue;
-
- pRawCluster = new AliRICHcluster;
- FormRawCluster(i,j,pRawCluster);
+ if(fDigitMap->TestHit(i,j)==kUsed) continue;//this digit is already taken, go after next digit
- if(AliRICHParam::IsResolveClusters()) {
- ResolveCluster(pRawCluster); // ResolveCluster serialization will happen inside
- } else {
- WriteRawCluster(pRawCluster); // simply output of the RawCluster found without deconvolution
- }
- delete pRawCluster;
+ FormRawCluster(i,j);//form raw cluster starting from (i,j) pad
+ AliDebug(1,"After FormRawCluster:");ToAliDebug(1,fRawCluster.Print());
+ FindLocalMaxima(); //find number of local maxima and initial center of gravity
+ AliDebug(1,"After FindLocalMaxima:");ToAliDebug(1,fRawCluster.Print());
- }//digits loop
+ if(AliRICHParam::IsResolveClusters()&&fNlocals<=6&&fRawCluster.Size()>1){
+ FitCoG(); //serialization of resolved clusters will happen inside
+ }else{//cluster size=1 or resolving is switched off
+ WriteRawCluster();//simply output the formed raw cluster without deconvolution
+ }
+ fRawCluster.Reset(); fResolvedCluster.Reset();
+ }//digits loop for a given chamber
- delete fHitMap;
- Info("FindRawClusters","Stop.");
+ delete fDigitMap;
-}//FindRawClusters()
+ AliDebug(1,"Stop.");
+}//FindClusters()
//__________________________________________________________________________________________________
-void AliRICHClusterFinder::FormRawCluster(Int_t i, Int_t j, AliRICHcluster *pCluster)
-{// Builder of the final Raw Cluster (before deconvolution)
- Info("FormRawCluster","Start with digit(%i,%i)",i,j);
+void AliRICHClusterFinder::FindClusterContribs(AliRICHCluster *pCluster)
+{
+//Finds cerenkov-feedback-mip mixture for a given cluster
+ AliDebug(1,"Start.");ToAliDebug(1,pCluster->Print());
+
+// R()->GetLoader()->GetRunLoader()->LoadHeader(); //...message from AliRunLoader...hopefully will disappear in future...
+ // sometimes no stack found if the above line is commented out!!
+ AliStack *pStack = R()->GetLoader()->GetRunLoader()->Stack();
+ if(!pStack)
+ {AliInfo("No Stack found!!! No contrib to cluster found.");return;}
-// Int_t idx = fHitMap->GetHitIndex(i,j);
- AliRICHdigit* pDigit = (AliRICHdigit*) fHitMap->GetHit(i,j);
- pCluster->AddDigit(pDigit);
+ TObjArray *pDigits = pCluster->Digits();
+ if(!pDigits) return; //??????????
+ Int_t iNmips=0,iNckovs=0,iNfeeds=0;
+ TArrayI contribs(3*pCluster->Size());
+ Int_t *pindex = new Int_t[3*pCluster->Size()];
+ for(Int_t iDigN=0;iDigN<pCluster->Size();iDigN++) {//loop on digits of a given cluster
+ contribs[3*iDigN] =((AliRICHDigit*)pDigits->At(iDigN))->GetTrack(0);
+ if (contribs[3*iDigN] >= 10000000) contribs[3*iDigN] = 0;
+ contribs[3*iDigN+1]=((AliRICHDigit*)pDigits->At(iDigN))->GetTrack(1);
+ if (contribs[3*iDigN+1] >= 10000000) contribs[3*iDigN+1] = 0;
+ contribs[3*iDigN+2]=((AliRICHDigit*)pDigits->At(iDigN))->GetTrack(2);
+ if (contribs[3*iDigN+2] >= 10000000) contribs[3*iDigN+2] = 0;
+ }//loop on digits of a given cluster
+ TMath::Sort(contribs.GetSize(),contribs.GetArray(),pindex);
+ for(Int_t iDigN=0;iDigN<3*pCluster->Size()-1;iDigN++) {//loop on digits to sort tids
+ AliDebug(1,Form("%4i for digit n. %4i",contribs[pindex[iDigN]],iDigN));
+ if(contribs[pindex[iDigN]]!=contribs[pindex[iDigN+1]]) {
+ Int_t thecontrib = contribs[pindex[iDigN]];
+ if (thecontrib>=pStack->GetNtrack()) continue;//PH this should not happen
+ TParticle* particle = pStack->Particle(thecontrib);
+ if (!particle) continue;//PH this should not happen
+ Int_t code = particle->GetPdgCode();
+ Double_t charge = 0;
+ if(particle->GetPDG()) charge=particle->GetPDG()->Charge();
+ AliDebug(1,Form(" charge of particle %f",charge));
+
+ if(code==50000050) iNckovs++;
+ if(code==50000051) iNfeeds++;
+ if(charge!=0) iNmips++;
+ }
+ }//loop on digits to sort Tid
- fHitMap->FlagHit(i,j);// Flag hit as taken
+ if (contribs[pindex[3*pCluster->Size()-1]]!=-1) {
+ Int_t thecontrib = contribs[pindex[3*pCluster->Size()-1]];
+ if (thecontrib<pStack->GetNtrack()){
+ //PH the opposite should not happen
+
+ TParticle* particle = pStack->Particle(thecontrib);
+ if (particle) {
+ //PH the opposite should not happen
+ Int_t code = particle->GetPdgCode();
+ Double_t charge = 0;
+ if(particle->GetPDG()) charge=particle->GetPDG()->Charge();
+ AliDebug(1,Form(" charge of particle %f",charge));
+ if(code==50000050) iNckovs++;
+ if(code==50000051) iNfeeds++;
+ if(charge!=0) iNmips++;
+ }
+ }
+ }
+
+ pCluster->CFM(iNckovs,iNfeeds,iNmips);
+//
+ delete [] pindex;
+ ToAliDebug(1,pCluster->Print());
+ AliDebug(1,"Stop.");
+}//FindClusterContribs()
+//__________________________________________________________________________________________________
+void AliRICHClusterFinder::FormRawCluster(Int_t i, Int_t j)
+{
+//Builds the raw cluster (before deconvolution). Starts from the first pad (i,j) then calls itself recursevly for all neighbours.
+ AliDebug(1,Form("Start with digit(%i,%i) Q=%f",i,j,((AliRICHDigit*)fDigitMap->GetHit(i,j))->Q()));
+
+ fRawCluster.AddDigit((AliRICHDigit*) fDigitMap->GetHit(i,j));//take this pad in cluster
+ fDigitMap->FlagHit(i,j);//flag this pad as taken
Int_t listX[4], listY[4]; // Now look recursively for all neighbours
- for (Int_t iNeighbour=0;iNeighbour<Rich()->Param()->PadNeighbours(i,j,listX,listY);iNeighbour++)
- if(fHitMap->TestHit(listX[iNeighbour],listY[iNeighbour])==kUnused)
- FormRawCluster(listX[iNeighbour],listY[iNeighbour],pCluster);
-}//AddDigit2Cluster()
+ for (Int_t iNei=0;iNei<R()->P()->PadNeighbours(i,j,listX,listY);iNei++)
+ if(fDigitMap->TestHit(listX[iNei],listY[iNei])==kUnused) FormRawCluster(listX[iNei],listY[iNei]);
+}//FormRawCluster()
//__________________________________________________________________________________________________
-void AliRICHClusterFinder::ResolveCluster(AliRICHcluster *pRawCluster)
-{// Decluster algorithm
- Info("ResolveCluster","Start.");
+void AliRICHClusterFinder::FindLocalMaxima()
+{
+//find number of local maxima in the current raw cluster and then calculates initial center of gravity
+ fNlocals=0;
+ AliDebug(1,Form("Cluster size of the Raw cluster ---> %i",fRawCluster.Size()));
+ for(Int_t iDig1=0;iDig1<fRawCluster.Size();iDig1++) {
+ Int_t iNotMax = 0;
+ AliRICHDigit *pDig1 = (AliRICHDigit *)fRawCluster.Digits()->At(iDig1);
+ if(!pDig1) {fNlocals=0;return;}
+ TVector pad1 = pDig1->Pad();
+ Int_t padQ1 = (Int_t)(pDig1->Q()+0.1);
+ Int_t padC1 = pDig1->ChFbMi();
+ for(Int_t iDig2=0;iDig2<fRawCluster.Size();iDig2++) {
+ AliRICHDigit *pDig2 = (AliRICHDigit *)fRawCluster.Digits()->At(iDig2);
+ if(!pDig2) {fNlocals=0;return;}
+ TVector pad2 = pDig2->Pad();
+ Int_t padQ2 = (Int_t)(pDig2->Q()+0.1);
+ if(iDig1==iDig2) continue;
+ Int_t diffx = TMath::Sign(Int_t(pad1[0]-pad2[0]),1);
+ Int_t diffy = TMath::Sign(Int_t(pad1[1]-pad2[1]),1);
+ if((diffx+diffy)<=1) {
+ if(padQ2>=padQ1) iNotMax++;
+ }
+ }
+ if(iNotMax==0) {
+ if (fNlocals<100) {
+ TVector2 x2=AliRICHParam::Pad2Loc(pad1);
+ fLocalX[fNlocals]=x2.X();fLocalY[fNlocals]=x2.Y();
+ fLocalQ[fNlocals] = (Double_t)padQ1;
+ fLocalC[fNlocals] = padC1;
+ fNlocals++;
+ }
+ }
+ }
+ AliDebug(1,Form("Number of local maxima found ---> %i",fNlocals));
+ fRawCluster.CoG(fNlocals); //first initial approximation of the CoG...to start minimization.
+}//FindLocalMaxima()
+//__________________________________________________________________________________________________
+void AliRICHClusterFinder::WriteRawCluster()
+{
+//Add the current raw cluster to the list of clusters
+ AliDebug(1,"Start.");
- pRawCluster->SetStatus(kRaw);// just dummy to compile...
-
-}//ResolveCluster()
+ FindClusterContribs(&fRawCluster);
+ R()->ClusterAdd(fRawCluster);
+
+ ToAliDebug(1,fRawCluster.Print()); AliDebug(1,"Stop.");
+}//WriteRawCluster()
//__________________________________________________________________________________________________
-void AliRICHClusterFinder::WriteRawCluster(AliRICHcluster *pRawCluster)
-{// out the current RawCluster
- Info("ResolveCluster","Start.");
+void AliRICHClusterFinder::WriteResolvedCluster()
+{
+//Add the current resolved cluster to the list of clusters
+ AliDebug(1,"Start.");
- pRawCluster->SetStatus(kRaw);
+ FindClusterContribs(&fResolvedCluster);
+ R()->ClusterAdd(fResolvedCluster);
+ ToAliDebug(1,fResolvedCluster.Print()); AliDebug(1,"Stop.");
+}//WriteResolvedCluster()
+//__________________________________________________________________________________________________
+void AliRICHClusterFinder::FitCoG()
+{
+//Fits cluster of size by the corresponding number of Mathieson shapes.
+//This methode is only invoked in case everything is ok to start deconvolution
+ AliDebug(1,"Start with:"); ToAliDebug(1,fRawCluster.Print());
-}//WriteRawCluster()
+ Double_t arglist;
+ Int_t ierflag = 0;
+
+ AliDebug(1,Form("MINUIT Started with %i parameters and %i local maxima",3*fNlocals-1,fNlocals));
+
+// TMinuit *pMinuit = new TMinuit(3*fNlocals-1);
+ TMinuit *pMinuit = new TMinuit(100);
+ pMinuit->mninit(5,10,7);
+
+ arglist = -1;
+ pMinuit->mnexcm("SET PRI",&arglist, 1, ierflag);
+ pMinuit->mnexcm("SET NOW",&arglist, 0, ierflag);
+
+ TString chname;
+ Int_t ierflg;
+
+ pMinuit->SetObjectFit((TObject*)this);
+ pMinuit->SetFCN(RICHMinMathieson);
+
+ Double_t vstart,lower, upper;
+ Double_t stepX= 0.01;
+ Double_t stepY= 0.01;
+ Double_t stepQ= 0.01;
+
+ for(Int_t i=0;i<fNlocals;i++) {
+ AliDebug(1,Form(" local minimum n. %i with Xstart %f and Ystart %f",i,fLocalX[i],fLocalY[i]));
+ vstart = fLocalX[i];
+ lower = vstart - 2*AliRICHParam::PadSizeX();
+ upper = vstart + 2*AliRICHParam::PadSizeX();
+ pMinuit->mnparm(3*i ,Form("xCoG %i",i),vstart,stepX,lower,upper,ierflag);
+ AliDebug(1,Form("xCoG %i vstart %f lower %f upper %f ",i,vstart,lower,upper));
+
+ vstart = fLocalY[i];
+ lower = vstart - 2*AliRICHParam::PadSizeY();
+ upper = vstart + 2*AliRICHParam::PadSizeY();
+ pMinuit->mnparm(3*i+1,Form("yCoG %i",i),vstart,stepY,lower,upper,ierflag);
+ AliDebug(1,Form("yCoG %i vstart %f lower %f upper %f ",i,vstart,lower,upper));
+ if(i==fNlocals-1) break; // last parameter is constrained
+ vstart = fLocalQ[i]/fRawCluster.Q();
+ lower = 0;
+ upper = 1;
+ pMinuit->mnparm(3*i+2,Form("qfrac %i",i),vstart,stepQ,lower,upper,ierflag);
+ AliDebug(1,Form("qfrac %i vstart %f lower %f upper %f ",i,vstart,lower,upper));
+ }
+
+ arglist = -1;
+ pMinuit->mnexcm("SET NOGR",&arglist, 1, ierflag);
+ arglist = 1;
+ pMinuit->mnexcm("SET ERR", &arglist, 1,ierflg);
+ arglist = -1;
+ pMinuit->mnexcm("SIMPLEX",&arglist, 0, ierflag);
+ pMinuit->mnexcm("MIGRAD",&arglist, 0, ierflag);
+// pMinuit->mnexcm("EXIT" ,&arglist, 0, ierflag);
+
+ Double_t xCoG[50],yCoG[50],qfracCoG[50];
+ Double_t eps, b1, b2;
+
+ Double_t qfraclast=0;
+ for(Int_t i=0;i<fNlocals;i++) {
+ pMinuit->mnpout(3*i ,chname, xCoG[i], eps , b1, b2, ierflg);
+ pMinuit->mnpout(3*i+1,chname, yCoG[i], eps , b1, b2, ierflg);
+ if(i==fNlocals-1) break;
+ pMinuit->mnpout(3*i+2,chname, qfracCoG[i], eps , b1, b2, ierflg);
+ qfraclast+=qfracCoG[i];
+ }
+ qfracCoG[fNlocals-1] = 1 - qfraclast;
+
+ delete pMinuit;
+
+ for(Int_t i=0;i<fNlocals;i++){//resolved positions loop
+ fResolvedCluster.Fill(&fRawCluster,xCoG[i],yCoG[i],qfracCoG[i],fLocalC[i]);
+ WriteResolvedCluster();
+ }
+
+
+ AliDebug(1,"Stop.");
+
+}//FitCoG()
+//__________________________________________________________________________________________________
+void RICHMinMathieson(Int_t &npar, Double_t *, Double_t &chi2, Double_t *par, Int_t )
+{
+//Mathieson minimization function
+
+ AliRICHCluster *pRawCluster = ((AliRICHClusterFinder*)gMinuit->GetObjectFit())->GetRawCluster();
+
+ TVector2 centroid[50];
+ Double_t q[50];
+ Int_t nFunctions = (npar+1)/3;
+ Double_t qfract = 0;
+ for(Int_t i=0;i<nFunctions;i++) {
+ centroid[i].Set(par[3*i],par[3*i+1]);
+ if(i==nFunctions-1) break;
+ q[i]=par[3*i+2];
+ qfract+=q[i];
+ }
+ q[nFunctions-1] = 1 - qfract;
+
+ chi2 = 0;
+ Int_t qtot = pRawCluster->Q();
+ for(Int_t i=0;i<pRawCluster->Size();i++) {
+ TVector pad=((AliRICHDigit *)pRawCluster->Digits()->At(i))->Pad();
+ Double_t padQ = ((AliRICHDigit *)pRawCluster->Digits()->At(i))->Q();
+ Double_t qfracpar=0;
+ for(Int_t j=0;j<nFunctions;j++) {
+ qfracpar += q[j]*AliRICHParam::FracQdc(centroid[j],pad);
+ }
+ chi2 += TMath::Power((qtot*qfracpar-padQ),2)/padQ;
+ }
+}//RICHMinMathieson()
//__________________________________________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff