+/**************************************************************************
+ * 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 <Riostream.h>
+
+#include "AliLog.h"
#include "AliGenExtFile.h"
-#include "AliGenMUONlib.h"
-#include "AliMC.h"
-#include "AliRun.h"
-#include <TDirectory.h>
+#include "AliRunLoader.h"
+#include "AliHeader.h"
+#include "AliStack.h"
+#include "AliGenEventHeader.h"
+#include "AliGenReader.h"
+
+#include <TParticle.h>
#include <TFile.h>
#include <TTree.h>
-#include <stdlib.h>
- 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 "<<fFileName<<" file "<<endl;
- }
-// get the tree address in the Fluka boundary source file
- fTreeNtuple = (TTree*)gDirectory->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
- 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;
- 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) {
- gMC->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; ie<fStartEvent; ++ie ) {
+ 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;
}
- }
+ 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; i<Ntracks; i++) {
-
- Double_t amass = TDatabasePDG::Instance()->GetParticle(Idpart)->Mass();
- if(E<=amass) {
- Warning("Generate","Particle %d no %d E = %f mass = %f\n",Idpart,i,E,amass);
- prwn=0;
- } else {
- prwn=sqrt((E+amass)*(E-amass));
- }
+ }
- Theta *= TMath::Pi()/180.;
- Phi = (Phi-180)*TMath::Pi()/180.;
- if(Theta<fThetaMin || Theta>fThetaMax ||
- Phi<fPhiMin || Phi>fPhiMax ||
- prwn<fPMin || prwn>fPMax)
- {
- ;
- } 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) {
- gMC->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<Int_t,Int_t> firstMotherMap;
+ map<Int_t,Int_t> secondMotherMap;
+ map<Int_t,Bool_t> selectedIdMap;
+ map<Int_t,Int_t> 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();
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff