X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=EVGEN%2FAliGenExtFile.cxx;h=4d26efa1533962022eb4e4a7214b43c1b9ceb6bd;hp=a3bda912b3f8d5c3282fbc3d58d2fb2ea61a61cd;hb=dd028c53090c8bd4eb79119d6a7aae3928ed4410;hpb=9b153ba22d4a4552f5c77b6471ba651b71bd59cd diff --git a/EVGEN/AliGenExtFile.cxx b/EVGEN/AliGenExtFile.cxx index a3bda912b3f..4d26efa1533 100644 --- a/EVGEN/AliGenExtFile.cxx +++ b/EVGEN/AliGenExtFile.cxx @@ -1,171 +1,298 @@ +/************************************************************************** + * 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. * + **************************************************************************/ + +/* $Id$ */ + +// Event generator that using an instance of type AliGenReader +// reads particles from a file and applies cuts. +// Example: In your Config.C you can include the following lines +// AliGenExtFile *gener = new AliGenExtFile(-1); +// gener->SetMomentumRange(0,999); +// gener->SetPhiRange(-180.,180.); +// gener->SetThetaRange(0,180); +// gener->SetYRange(-999,999); +// AliGenReaderTreeK * reader = new AliGenReaderTreeK(); +// reader->SetFileName("myFileWithTreeK.root"); +// gener->SetReader(reader); +// gener->Init(); + + +#include + +#include "AliLog.h" #include "AliGenExtFile.h" -#include "AliGenMUONlib.h" -#include "AliMC.h" -#include "AliRun.h" -#include +#include "AliRunLoader.h" +#include "AliHeader.h" +#include "AliStack.h" +#include "AliGenEventHeader.h" +#include "AliGenReader.h" + +#include #include #include -#include - ClassImp(AliGenExtFile) - AliGenExtFile::AliGenExtFile() - :AliGenerator(-1) + + +using std::cout; +using std::endl; +using std::map; + +ClassImp(AliGenExtFile) + +AliGenExtFile::AliGenExtFile() + :AliGenMC(), + fFileName(0), + fReader(0), + fStartEvent(0) { - // - fName="ExtFile"; - fTitle="Primaries from ext. File"; - fFileName="dtujet93.root"; - fTreeNtuple=0; - fNcurrent=0; +// Constructor // // Read all particles - fNpart=-1; + fNpart = -1; } AliGenExtFile::AliGenExtFile(Int_t npart) - :AliGenerator(npart) + :AliGenMC(npart), + fFileName(0), + fReader(0), + fStartEvent(0) { - // - fName="ExtFile"; - fTitle="Primaries from ext. File"; - fFileName="dtujet93.root"; - fTreeNtuple=0; - fNcurrent=0; +// Constructor + fName = "ExtFile"; + fTitle = "Primaries from ext. File"; } //____________________________________________________________ AliGenExtFile::~AliGenExtFile() { - delete fTreeNtuple; +// Destructor + delete fReader; } -//____________________________________________________________ -void AliGenExtFile::NtupleInit() +//___________________________________________________________ +void AliGenExtFile::Init() { -// -// reset the existing file environment and open a new root file if -// the pointer to the Fluka tree is null - - TFile *File=0; - if (fTreeNtuple==0) { - if (!File) { - File = new TFile(fFileName); - File->cd(); - cout<<"I have opened "<Get("h888"); - } else { - File = fTreeNtuple->GetCurrentFile(); - File->cd(); - } - - TTree *h2=fTreeNtuple; -//Set branch addresses -//Set branch addresses - h2->SetBranchAddress("Nihead",&Nihead); - h2->SetBranchAddress("Ihead",Ihead); - h2->SetBranchAddress("Nrhead",&Nrhead); - h2->SetBranchAddress("Rhead",Rhead); - h2->SetBranchAddress("Idpart",&Idpart); - h2->SetBranchAddress("Theta",&Theta); - h2->SetBranchAddress("Phi",&Phi); - h2->SetBranchAddress("P",&P); - h2->SetBranchAddress("E",&E); +// Initialize + if (fReader) fReader->Init(); } - -//____________________________________________________________ +//___________________________________________________________ void AliGenExtFile::Generate() { +// Generate particles - AliMC* pMC = AliMC::GetMC(); - - Float_t polar[3]= {0,0,0}; + Double_t polar[3] = {0,0,0}; // - Float_t origin[3]={0,0,0}; - Float_t p[3]; + Double_t origin[3] = {0,0,0}; + Double_t time = 0.; + Double_t p[4]; Float_t random[6]; - Float_t prwn; - char name[100]; - Float_t amass, charge, tlife; - Int_t itrtyp; - Int_t i, j, nt, Ntracks=0; + Int_t i=0, j, nt; // - NtupleInit(); - TTree *h2=fTreeNtuple; - Int_t nentries = (Int_t) h2->GetEntries(); - // loop over number of particles - Int_t nb = (Int_t)h2->GetEvent(fNcurrent); - Int_t i5=Ihead[4]; - Int_t i6=Ihead[5]; - - for (j=0;j<3;j++) origin[j]=fOrigin[j]; - if(fVertexSmear==perEvent) { - pMC->Rndm(random,6); - for (j=0;j<3;j++) { - origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* - TMath::Sqrt(-2*TMath::Log(random[2*j+1])); + // + if (fVertexSmear == kPerEvent) Vertex(); + + // Fast forward up to start Event + for (Int_t ie=0; ieNextEvent(); + if (nTracks == 0) { + // printf("\n No more events !!! !\n"); + Warning("AliGenExtFile::Generate","\nNo more events in external file!!!\nLast event may be empty or incomplete.\n"); + return; + } + for (i = 0; i < nTracks; ++i) { + if (NULL == fReader->NextParticle()) + AliFatal("Error while skipping tracks"); } - } + cout << "Skipping event " << ie << endl; + } + fStartEvent = 0; // do not skip events the second time - if (fNcurrent >= nentries) { - printf("\n No more entries !!! !\n"); + while(1) { + Int_t nTracks = fReader->NextEvent(); + if (nTracks == 0) { + // printf("\n No more events !!! !\n"); + Warning("AliGenExtFile::Generate","\nNo more events in external file!!!\nLast event may be empty or incomplete.\n"); return; - } - - - if (i5==0) { - printf("\n This should never happen !\n"); - } else { - printf("\n Next event contains %d tracks! \n", i6); - Ntracks=i6; - } - for (i=0; iGfpart(Idpart, name, itrtyp,amass, charge, tlife); - prwn=sqrt((E+amass)*(E-amass)); - - Theta *= TMath::Pi()/180.; - Phi = (Phi-180)*TMath::Pi()/180.; - if(ThetafThetaMax || - PhifPhiMax || - prwnfPMax) - { - ; - } else { - p[0]=prwn*TMath::Sin(Theta)*TMath::Cos(Phi); - p[1]=prwn*TMath::Sin(Theta)*TMath::Sin(Phi); - p[2]=prwn*TMath::Cos(Theta); - - if(fVertexSmear==perTrack) { - pMC->Rndm(random,6); - for (j=0;j<3;j++) { - origin[j]=fOrigin[j] - +fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* - TMath::Sqrt(-2*TMath::Log(random[2*j+1])); - } + } + + // + // Particle selection loop + // + // The selection criterium for the external file generator is as follows: + // + // 1) All tracks are subject to the cuts defined by AliGenerator, i.e. + // fThetaMin, fThetaMax, fPhiMin, fPhiMax, fPMin, fPMax, fPtMin, fPtMax, + // fYMin, fYMax. + // If the particle does not satisfy these cuts, it is not put on the + // stack. + // 2) If fCutOnChild and some specific child is selected (e.g. if + // fForceDecay==kSemiElectronic) the event is rejected if NOT EVEN ONE + // child falls into the child-cuts. + TParticle* iparticle = 0x0; + + if(fCutOnChild) { + // Count the selected children + Int_t nSelected = 0; + while ((iparticle=fReader->NextParticle()) ) { + Int_t kf = CheckPDGCode(iparticle->GetPdgCode()); + kf = TMath::Abs(kf); + if (ChildSelected(kf) && KinematicSelection(iparticle, 1)) { + nSelected++; } - gAlice->SetTrack(fTrackIt,-1,Idpart,p,origin,polar,0,"Primary",nt); } - fNcurrent++; - nb = (Int_t)h2->GetEvent(fNcurrent); - } - - TFile *File=0; -// Get AliRun object or create it - if (!gAlice) { - gAlice = (AliRun*)File->Get("gAlice"); - if (gAlice) printf("AliRun object found on file\n"); - if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); + if (!nSelected) continue; // No particle selected: Go to next event + fReader->RewindEvent(); } - TTree *fAli=gAlice->TreeK(); - if (fAli) File =fAli->GetCurrentFile(); - File->cd(); -} + // + // Stack selection loop + // + class SelectorLogic { // need to do recursive back tracking, requires a "nested" function + private: + Int_t idCount; + map firstMotherMap; + map secondMotherMap; + map selectedIdMap; + map newIdMap; + void selectMothersToo(Int_t particleId) { + Int_t mum1 = firstMotherMap[particleId]; + if (mum1 > -1 && !selectedIdMap[mum1]) { + selectedIdMap[mum1] = true; + selectMothersToo(mum1); + } + Int_t mum2 = secondMotherMap[particleId]; + if (mum2 > -1 && !selectedIdMap[mum2]) { + selectedIdMap[mum2] = true; + selectMothersToo(mum2); + } + } + public: + SelectorLogic():idCount(0), firstMotherMap(), secondMotherMap(), selectedIdMap(), newIdMap() {} + void init() { + idCount = 0; + } + void setData(Int_t id, Int_t mum1, Int_t mum2, Bool_t selected) { + idCount++; // we know that this function is called in succession of ids, so counting is fine to determine max id + firstMotherMap[id] = mum1; + secondMotherMap[id] = mum2; + selectedIdMap[id] = selected; + } + void reselectCuttedMothersAndRemapIDs() { + for (Int_t id = 0; id < idCount; ++id) { + if (selectedIdMap[id]) { + selectMothersToo(id); + } + } + Int_t newId0 = 0; + for (Int_t id = 0; id < idCount; id++) { + if (selectedIdMap[id]) { + newIdMap[id] = newId0; ++newId0; + } else { + newIdMap[id] = -1; + } + } + } + Bool_t isSelected(Int_t id) { + return selectedIdMap[id]; + } + Int_t newId(Int_t id) { + if (id == -1) return -1; + return newIdMap[id]; + } + }; + SelectorLogic selector; + selector.init(); + for (i = 0; i < nTracks; i++) { + TParticle* jparticle = fReader->NextParticle(); + selector.setData(i, + jparticle->GetFirstMother(), + jparticle->GetSecondMother(), + KinematicSelection(jparticle,0)); + } + selector.reselectCuttedMothersAndRemapIDs(); + fReader->RewindEvent(); + + // + // Stack filling loop + // + fNprimaries = 0; + for (i = 0; i < nTracks; i++) { + TParticle* jparticle = fReader->NextParticle(); + Bool_t selected = selector.isSelected(i); + if (!selected) { + continue; + } + Int_t parent = selector.newId(jparticle->GetFirstMother()); +// printf("particle %d -> %d, with mother %d -> %d\n", i, selector.newId(i), jparticle->GetFirstMother(), parent); + p[0] = jparticle->Px(); + p[1] = jparticle->Py(); + p[2] = jparticle->Pz(); + p[3] = jparticle->Energy(); + + Int_t idpart = jparticle->GetPdgCode(); + if(fVertexSmear==kPerTrack) + { + Rndm(random,6); + for (j = 0; j < 3; j++) { + origin[j]=fOrigin[j]+ + fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* + TMath::Sqrt(-2*TMath::Log(random[2*j+1])); + } + Rndm(random,2); + time = fTimeOrigin + fOsigma[2]/TMath::Ccgs()* + TMath::Cos(2*random[0]*TMath::Pi())* + TMath::Sqrt(-2*TMath::Log(random[1])); + } else { + origin[0] = fVertex[0] + jparticle->Vx(); + origin[1] = fVertex[1] + jparticle->Vy(); + origin[2] = fVertex[2] + jparticle->Vz(); + time = fTime + jparticle->T(); + } + Int_t doTracking = fTrackIt && selected && (jparticle->TestBit(kTransportBit)); + + PushTrack(doTracking, parent, idpart, + p[0], p[1], p[2], p[3], origin[0], origin[1], origin[2], time, + polar[0], polar[1], polar[2], + kPPrimary, nt, 1., jparticle->GetStatusCode()); + KeepTrack(nt); + fNprimaries++; + } // track loop + // Generated event header + AliGenEventHeader * header = fReader->GetGenEventHeader(); + if (!header) header = new AliGenEventHeader(); + header->SetNProduced(fNprimaries); + header->SetPrimaryVertex(fVertex); + header->SetInteractionTime(fTime); + AddHeader(header); + break; + + } // event loop + + SetHighWaterMark(nt); + CdEventFile(); +} + +//___________________________________________________________ +void AliGenExtFile::CdEventFile() +{ +// CD back to the event file + AliRunLoader::Instance()->CdGAFile(); +}