CBM Simulation & Analysis Framework Connecting Data Level

10.05.2004 CBM Software Meeting 1

CBM Simulation & Analysis FrameworkCBM Simulation & Analysis FrameworkConnecting Data LevelConnecting Data Level

M. Al-Turany, D. Bertini


Data Level StructureData Level Structure

CBMTask2

input

outputDet 2

CBMTask1

input

outputDet 1

CBMTask3

input

outputfilter

CBMRun: TMainTask

Input TTree • TClonesArray

of MCPoints

Output TTree • TClonesArray

of Det 1 Hits


of Det 1 Hits

• TClonesArray of Det 2 Hits

• TClonesArray of Filtered Hits


of Det 1 Hits

• TClonesArray of Det 2 Hits

• Number of partially elaborated data levels is detector dependant, even algorithm dependant.


Connecting Data LevelsConnecting Data Levels

• Every Analysis tasks produces detector/algorithm dependant Data Levels

• Problem: we don’t want to copy always all Data Levels in one BIG TTree– Not optimized ( IO, mass storage)– Not suitable in code development period– May be OK for DST production, etc…

• Solution:– CBM_VMC support usage of friend TTree Mechanism– Can be seen as a ntuple merging mechanism


Friend TTreeFriend TTree

• Dynamic addition of TTree Structure on Top of an existing TTree

• Allow to connect different Data Levels without limitation on internal structure in the friend trees.

• Friend mechanism is an internal feature of the TTree class


Task exampleTask example

CBMHitProducer

input

outputDet 2

CBMTracker

input

outputDet 1

CBMTRD

input

outputfilter

CBMRun: TMainTask

CBMRun: TMainTask

CBMRun: TMainTask

Urqmd STSMCPts

STSHits

STSMCPts

Urqmd TRDHits


STSDoubleHit producer macroSTSDoubleHit producer macro

gROOT->LoadMacro("../basiclibs.C"); basiclibs(); CBMRun *fRun= new CBMRun(); fRun->SetName("TGeant3"); fRun->SetInputFile("Urqmd_100evt.root");fRun->LoadGeometry(); fRun->SetOutputFile("cbmout.root");

CBMSTSDoubleHitProducer *tr= new CBMSTSDoubleHitProducer("DHit conversion");

//Smear the MCPoint in X and Y Double_t dx = 10. e-4; // 10 mu in X Double_t dy = 10. e-4; // 10 mu in Y tr->SmearingXY(dx , dy ); fRun->AddTask(tr); fRun->Init();fRun->Run();


Task example with friend input Task example with friend input

CBMFilter

input

outputDet 1

Friend: TRDHit

Input: STSMCPts

Friend:STSHits

Output


Filter Task Example Filter Task Example

• CBMFilter::Init() get pointer to Data level structure from differents input files

void CBMFilter::Init() {

CBMRootManager *fManger =CBMRootManager::Instance();

cl1=(TClonesArray *) fManger->ActivateBranch("STSDoublePoint");

cl2=(TClonesArray *) fManger->ActivateBranch("STSDoubleHit");

cl3=(TClonesArray *) fManger->ActivateBranch("TRDHit");

// test validity for pointers cl1,cl2, cl3…

Register();

}


Task::Exec() exampleTask::Exec() example

void CBMSTSDoubleHitProducer::Exec(Option_t * option) { If (cl1)cout << "CBMSTSDoubleHitProducer::Exec : MCPts entries " << cl1->GetEntriesFast() <<endl; If (cl2) cout << "CBMSTSDoubleHitProducer::Exec : STS Hit entries " << cl2->GetEntriesFast() <<endl;If (cl3)cout << "CBMSTSDoubleHitProducer::Exec : TRD entries " << cl3->GetEntriesFast() <<endl;

CBMSTSDoublePoint *stsPts=NULL; CBMSTSDoubleHit *stshit=NULL; CBMTRDHit *trdhit=NULL;// loop over STSDoublePoints entriesfor (int j=0; j < cl1->GetEntries(); j++ ) {// .. do something with STSDoublePoints for (int k=0; k < cl2->GetEntries(); k++ ) { //… do something with STSHit for (int k=0; k < cl2->GetEntries(); k++ ) { // … do something with TRDHit


Analysis Macro with ROOT (1)Analysis Macro with ROOT (1)

// Load basic librariesgROOT->LoadMacro("../basiclibs.C");basiclibs();

// … here load other necessary libraries// Load analysis libraries gSystem->Load("libCbm"); gSystem->Load("libSTS"); gSystem->Load("libTrd");// Use friend mechanism to read all stuff backTFile *f=new TFile("../run/STSD_AuAu25GeV_Urqmd_100evt.root"); TFile *f1=new TFile(“STSDoubleHit.root");TFile *f2=new TFile(“STSTRDHit.root");//Get the TTreeTTree *t1 = (TTree*) f->Get("cbmsim");

t1->AddFriend("cbmsim",f1); t1->AddFriend("cbmsim",f2);


Analysis macro with ROOT (2)Analysis macro with ROOT (2)/Get the FoldersTFolder *fd1 = f->Get("cbmroot"); TFolder *fd2 = f1->Get("cbmout");

// link the different structures to the input treeTClonesArray *stsPoint = (TClonesArray*) fd1->FindObjectAny("STSDoublePoint"); TClonesArray *stsHit = (TClonesArray*) fd2->FindObjectAny("STSDoubleHit"); t1->SetBranchAddress(stsPoint->GetName(),&stsPoint);t1->SetBranchAddress(stsHit->GetName(),&stsHit);

for(Int_t i=0;i<t1->GetEntries();i++ ) { t1->GetEntry(i); // loop over Double hit for (Int_t j=0;j<stsHit->GetEntriesFast();j++){ CBMSTSDoubleHit * hit = (CBMSTSDoubleHit*) stsHit->At(j); // find now the corresponding MCpoint to this hit CBMSTSDoublePoint * pt = (CBMSTSDoublePoint*) stsPoint->At(hit->GetRefIndex()); // print the Z value of hit to the outer boundary // and the corresponding TOF at that point cout << "DHit Zout:" << hit->z_out() << endl; cout << " corresponding Tof " << pt->GetTime(1) << endl;


Analysis Macro with CBM_VMCAnalysis Macro with CBM_VMC

// Load basic lib gROOT->LoadMacro("../basiclibs.C"); basiclibs();// Load Libraries gSystem->Load("libCbm"); gSystem->Load("libSTS"); gSystem->Load("libTrd");// Create a new Run CBMRun *fRun= new CBMRun();

fRun->SetInputFile("../run/STSD_AuAu25GeV_Urqmd_100evt.root"); // Adding friend trees TFile *f= new TFile("cbmstshit.root"); TFile *f1= new TFile("../trd/cbmtrdhit.root"); fRun->AddFriend(f); fRun->AddFriend(f1);

fRun->SetOutputFile("cbmtotal.root"); … now add your tasks …


Analysis Macro with CBM_VMCAnalysis Macro with CBM_VMC

// create the taks and add it to the RUN

CBMFilter *tr= new

CBMFilter(“STS-TRDHit selection");

// Smear the MCPoint in X and Y

Double_t dx = 10. e-4; // 10 mu in X

Double_t dy = 10. e-4; // 10 mu in Y

tr->SmearingXY(dx , dy );

fRun->AddTask(tr);

fRun->Init();

fRun->Run();

CBM Simulation & Analysis Framework Connecting Data Level

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