/************************************************************************* * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ //_________________________________________________________________________ // This is a TTask that makes SDigits out of Hits // A Summable Digits is the sum of all hits originating // from one in one tower of the EMCAL // A threshold for assignment of the primary to SDigit is applied // // JLK 26-Jun-2008 Added explanation: // SDigits need to hold the energy sum of the hits, but AliEMCALDigit // can (should) only store amplitude. Therefore, the SDigit energy is // "digitized" before being stored and must be "calibrated" back to an // energy before SDigits are summed to form true Digits // // SDigits are written to TreeS, branch "EMCAL" // AliEMCALSDigitizer with all current parameters is written // to TreeS branch "AliEMCALSDigitizer". // Both branches have the same title. If necessary one can produce // another set of SDigits with different parameters. Two versions // can be distunguished using titles of the branches. // User case: // root [0] AliEMCALSDigitizer * s = new AliEMCALSDigitizer("galice.root") // Warning in : object already instantiated // root [1] s->ExecuteTask() // // Makes SDigitis for all events stored in galice.root // root [2] s->SetPedestalParameter(0.001) // // One can change parameters of digitization // root [3] s->SetSDigitsBranch("Redestal 0.001") // // and write them into the new branch // root [4] s->ExeciteTask("deb all tim") // // available parameters: // deb - print # of produced SDigitis // deb all - print # and list of produced SDigits // tim - print benchmarking information // //*-- Author : Sahal Yacoob (LBL) // based on : AliPHOSSDigitzer // Modif: // August 2002 Yves Schutz: clone PHOS as closely as possible and intoduction // of new IO (à la PHOS) ////////////////////////////////////////////////////////////////////////////// // --- ROOT system --- #include #include #include #include #include // --- Standard library --- #include "stdlib.h" // --- AliRoot header files --- #include "AliLog.h" #include "AliRunLoader.h" #include "AliStack.h" #include "AliEMCALDigit.h" #include "AliEMCALLoader.h" #include "AliEMCALHit.h" #include "AliEMCALSDigitizer.h" #include "AliEMCALGeometry.h" ClassImp(AliEMCALSDigitizer) //____________________________________________________________________________ AliEMCALSDigitizer::AliEMCALSDigitizer() : TTask("",""), fA(0.),fB(0.),fECPrimThreshold(0.), fDefaultInit(kTRUE), fEventFolderName(0), fInit(0), fSDigitsInRun(0), fFirstEvent(0), fLastEvent(0), fSampling(0.) { // ctor InitParameters(); } //____________________________________________________________________________ AliEMCALSDigitizer::AliEMCALSDigitizer(const char * alirunFileName, const char * eventFolderName) : TTask("EMCAL"+AliConfig::Instance()->GetSDigitizerTaskName(), alirunFileName), fA(0.),fB(0.),fECPrimThreshold(0.), fDefaultInit(kFALSE), fEventFolderName(eventFolderName), fInit(0), fSDigitsInRun(0), fFirstEvent(0), fLastEvent(0), fSampling(0.) { // ctor Init(); InitParameters() ; } //____________________________________________________________________________ AliEMCALSDigitizer::AliEMCALSDigitizer(const AliEMCALSDigitizer & sd) : TTask(sd.GetName(),sd.GetTitle()), fA(sd.fA), fB(sd.fB), fECPrimThreshold(sd.fECPrimThreshold), fDefaultInit(sd.fDefaultInit), fEventFolderName(sd.fEventFolderName), fInit(sd.fInit), fSDigitsInRun(sd.fSDigitsInRun), fFirstEvent(sd.fFirstEvent), fLastEvent(sd.fLastEvent), fSampling(sd.fSampling) { //cpy ctor } //____________________________________________________________________________ AliEMCALSDigitizer::~AliEMCALSDigitizer() { //dtor AliLoader *emcalLoader=0; if ((emcalLoader = AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL"))) emcalLoader->CleanSDigitizer(); } //____________________________________________________________________________ void AliEMCALSDigitizer::Init(){ // Initialization: open root-file, allocate arrays for hits and sdigits, // attach task SDigitizer to the list of EMCAL tasks // // Initialization can not be done in the default constructor //============================================================= YS // The initialisation is now done by the getter fInit = kTRUE; AliEMCALLoader *emcalLoader = dynamic_cast(AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL")); if ( emcalLoader == 0 ) { Fatal("Init", "Could not obtain the AliEMCALLoader"); return ; } emcalLoader->PostSDigitizer(this); emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE); } //____________________________________________________________________________ void AliEMCALSDigitizer::InitParameters() { //initialize parameters for sdigitization const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance(); if (geom->GetSampling() == 0.) { Fatal("InitParameters", "Sampling factor not set !") ; } // //JLK 26-Jun-2008 THIS SHOULD HAVE BEEN EXPLAINED AGES AGO: // //In order to be able to store SDigit Energy info into //AliEMCALDigit, we need to convert it temporarily to an ADC amplitude //and later when summing SDigits to form digits, convert it back to //energy. These fA and fB parameters accomplish this through the //Digitize() and Calibrate() methods // // Initializes parameters fA = 0; fB = 1.e+6; // Changed 24 Apr 2007. Dynamic range now 2 TeV fSampling = geom->GetSampling(); // threshold for deposit energy of hit fECPrimThreshold = 0.05;// GeV // 22-may-07 was 0// 24-nov-04 - was 1.e-6; AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName())); AliDebug(2,Form(" fInit %i\n", int(fInit))); AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent)); AliDebug(2,Form(" fLastEvent %i\n", fLastEvent)); AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data())); AliDebug(2,Form(" with digitization parameters A = %f\n", fA)); AliDebug(2,Form(" B = %f\n", fB)); AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold)); AliDebug(2,Form(" Sampling = %f\n", fSampling)); AliDebug(2,Form("---------------------------------------------------\n")); } //____________________________________________________________________________ void AliEMCALSDigitizer::Exec(Option_t *option) { // Collects all hit of the same tower into digits TString o(option); o.ToUpper(); if (strstr(option, "print") ) { AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName())); AliDebug(2,Form(" fInit %i\n", int(fInit))); AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent)); AliDebug(2,Form(" fLastEvent %i\n", fLastEvent)); AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data())); AliDebug(2,Form(" with digitization parameters A = %f\n", fA)); AliDebug(2,Form(" B = %f\n", fB)); AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold)); AliDebug(2,Form(" Sampling = %f\n", fSampling)); AliDebug(2,Form("---------------------------------------------------\n")); return ; } if(strstr(option,"tim")) gBenchmark->Start("EMCALSDigitizer"); AliRunLoader *rl = AliRunLoader::GetRunLoader(); AliEMCALLoader *emcalLoader = dynamic_cast(rl->GetDetectorLoader("EMCAL")); //switch off reloading of this task while getting event if (!fInit) { // to prevent overwrite existing file AliError( Form("Give a version name different from %s", fEventFolderName.Data()) ) ; return ; } if (fLastEvent == -1) fLastEvent = rl->GetNumberOfEvents() - 1 ; else { fLastEvent = TMath::Min(fLastEvent, rl->GetNumberOfEvents()-1); } Int_t nEvents = fLastEvent - fFirstEvent + 1; Int_t ievent; Float_t energy=0.; // de * fSampling - 23-nov-04 rl->LoadKinematics(); rl->LoadHits("EMCAL"); for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) { rl->GetEvent(ievent); TTree * treeS = emcalLoader->TreeS(); if ( !treeS ) { emcalLoader->MakeSDigitsContainer(); treeS = emcalLoader->TreeS(); } TClonesArray * hits = emcalLoader->Hits() ; TClonesArray * sdigits = emcalLoader->SDigits() ; sdigits->Clear(); Int_t nSdigits = 0 ; Int_t i; AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance(); for ( i = 0 ; i < hits->GetEntries() ; i++ ) { AliEMCALHit * hit = dynamic_cast(hits->At(i)) ; AliEMCALDigit * curSDigit = 0 ; AliEMCALDigit * sdigit = 0 ; Bool_t newsdigit = kTRUE; // hit->GetId() - Absolute Id number EMCAL segment if(geom->CheckAbsCellId(hit->GetId())) { // was IsInECA(hit->GetId()) energy = hit->GetEnergy() * fSampling; // 23-nov-04 if(energy > fECPrimThreshold ) // Assign primary number only if deposited energy is significant curSDigit = new AliEMCALDigit( hit->GetPrimary(), hit->GetIparent(), hit->GetId(), Digitize(energy), hit->GetTime(), -1, energy ) ; else curSDigit = new AliEMCALDigit( -1 , -1 , hit->GetId(), Digitize(energy), hit->GetTime(), -1, energy ) ; } else { Warning("Exec"," abs id %i is bad \n", hit->GetId()); newsdigit = kFALSE; curSDigit = 0; } if(curSDigit != 0){ for(Int_t check= 0; check < nSdigits ; check++) { sdigit = dynamic_cast(sdigits->At(check)) ; if( sdigit->GetId() == curSDigit->GetId()) { // Are we in the same ECAL tower ? *sdigit = *sdigit + *curSDigit; newsdigit = kFALSE; } } } if (newsdigit) { new((*sdigits)[nSdigits]) AliEMCALDigit(*curSDigit); nSdigits++ ; } delete curSDigit ; } // loop over all hits (hit = deposited energy/entering particle) sdigits->Sort() ; nSdigits = sdigits->GetEntriesFast() ; fSDigitsInRun += nSdigits ; for (i = 0 ; i < sdigits->GetEntriesFast() ; i++) { AliEMCALDigit * sdigit = dynamic_cast(sdigits->At(i)) ; sdigit->SetIndexInList(i) ; } // Now write SDigits Int_t bufferSize = 32000 ; TBranch * sdigitsBranch = treeS->GetBranch("EMCAL"); if (sdigitsBranch) sdigitsBranch->SetAddress(&sdigits); else treeS->Branch("EMCAL",&sdigits,bufferSize); treeS->Fill(); emcalLoader->WriteSDigits("OVERWRITE"); //NEXT - SDigitizer emcalLoader->WriteSDigitizer("OVERWRITE"); // why in event cycle ? if(strstr(option,"deb")) PrintSDigits(option) ; } Unload(); emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE); if(strstr(option,"tim")){ gBenchmark->Stop("EMCALSDigitizer"); printf("\n Exec: took %f seconds for SDigitizing %f seconds per event\n", gBenchmark->GetCpuTime("EMCALSDigitizer"), gBenchmark->GetCpuTime("EMCALSDigitizer")/nEvents ) ; } } //__________________________________________________________________ Int_t AliEMCALSDigitizer::Digitize(Float_t energy)const { // Digitize the energy // //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE: // //We have to digitize the SDigit energy so that it can be stored in //AliEMCALDigit, which has only an ADC amplitude member and //(rightly) no energy member. This method converts the energy to an //integer which can be re-converted back to an energy with the //Calibrate(energy) method when it is time to create Digits from SDigits // Double_t aSignal = fA + energy*fB; if (TMath::Abs(aSignal)>2147483647.0) { //PH 2147483647 is the max. integer //PH This apparently is a problem which needs investigation AliWarning(Form("Too big or too small energy %f",aSignal)); aSignal = TMath::Sign((Double_t)2147483647,aSignal); } return (Int_t ) aSignal; } //__________________________________________________________________ Float_t AliEMCALSDigitizer::Calibrate(Int_t amp)const { // // Convert the amplitude back to energy in GeV // //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE: // //We have to digitize the SDigit energy with the method Digitize() //so that it can be stored in AliEMCALDigit, which has only an ADC //amplitude member and (rightly) no energy member. This method is //just the reverse of Digitize(): it converts the stored amplitude //back to an energy value in GeV so that the SDigit energies can be //summed before adding noise and creating digits out of them // return (Float_t)(amp - fA)/fB; } //__________________________________________________________________ void AliEMCALSDigitizer::Print1(Option_t * option) { Print(); PrintSDigits(option); } //__________________________________________________________________ void AliEMCALSDigitizer::Print(Option_t *option) const { // Prints parameters of SDigitizer printf("Print: \n------------------- %s ------------- option %s\n", GetName() , option) ; printf(" fInit %i\n", int(fInit)); printf(" fFirstEvent %i\n", fFirstEvent); printf(" fLastEvent %i\n", fLastEvent); printf(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()) ; printf(" with digitization parameters A = %f\n", fA) ; printf(" B = %f\n", fB) ; printf(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold) ; printf(" Sampling = %f\n", fSampling); printf("---------------------------------------------------\n") ; } //__________________________________________________________________ Bool_t AliEMCALSDigitizer::operator==( AliEMCALSDigitizer const &sd )const { // Equal operator. // SDititizers are equal if their pedestal, slope and threshold are equal if( (fA==sd.fA)&&(fB==sd.fB)&& (fECPrimThreshold==sd.fECPrimThreshold)) return kTRUE ; else return kFALSE ; } //__________________________________________________________________ void AliEMCALSDigitizer::PrintSDigits(Option_t * option) { //Prints list of digits produced at the current pass of AliEMCALDigitizer AliEMCALLoader *rl = dynamic_cast(AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL")); const TClonesArray * sdigits = rl->SDigits() ; printf("\n") ; printf("event %i", rl->GetRunLoader()->GetEventNumber()); printf(" Number of entries in SDigits list %i", sdigits->GetEntriesFast()); if(strstr(option,"all")||strstr(option,"EMC")){ //loop over digits AliEMCALDigit * digit; printf("\n Id Amplitude Time Index Nprim: Primaries list \n") ; Int_t index, isum=0; char * tempo = new char[8192]; for (index = 0 ; index < sdigits->GetEntries() ; index++) { digit = dynamic_cast( sdigits->At(index) ) ; sprintf(tempo, "\n%6d %8d %6.5e %4d %2d :", digit->GetId(), digit->GetAmp(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ; printf(tempo); isum += digit->GetAmp(); Int_t iprimary; for (iprimary=0; iprimaryGetNprimary(); iprimary++) { sprintf(tempo, "%d ",digit->GetPrimary(iprimary+1) ) ; printf(tempo); } } delete tempo ; printf("\n** Sum %i : %10.3f GeV/c **\n ", isum, Calibrate(isum)); } else printf("\n"); } //____________________________________________________________________________ void AliEMCALSDigitizer::Unload() const { // Unload Hits and SDigits from the folder AliEMCALLoader *rl = dynamic_cast(AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL")); rl->UnloadHits() ; rl->UnloadSDigits() ; } //____________________________________________________________________________ void AliEMCALSDigitizer::Browse(TBrowser* b) { TTask::Browse(b); }