* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.20.4.1 2002/06/10 14:57:41 hristov
-Merged with v3-08-02
-
-Revision 1.22 2002/05/15 11:59:49 morsch
-CdEventFile() method added.
-
-Revision 1.21 2002/04/26 10:39:31 morsch
-AliGenExtFile derives from AliGenMC. Generate() uses methods from AliGenMC (N. Carrer)
-
-Revision 1.20 2002/03/22 09:43:28 morsch
-Don't delete the TParticle.
-
-Revision 1.19 2002/02/08 16:50:50 morsch
-Add name and title in constructor.
-
-Revision 1.18 2001/11/12 14:31:00 morsch
-Memory leaks fixed. (M. Bondila)
-
-Revision 1.17 2001/11/09 09:12:58 morsch
-Generalization by using AliGenReader object to read particles from file.
-
-Revision 1.16 2001/07/27 17:09:35 morsch
-Use local SetTrack, KeepTrack and SetHighWaterMark methods
-to delegate either to local stack or to stack owned by AliRun.
-(Piotr Skowronski, A.M.)
-
-Revision 1.15 2001/01/23 13:29:37 morsch
-Add method SetParticleCode and enum type Code_t to handle both PDG (new ntuples)
-and GEANT3 codes (old ntuples) in input file.
-
-Revision 1.14 2000/12/21 16:24:06 morsch
-Coding convention clean-up
-
-Revision 1.13 2000/11/30 07:12:50 alibrary
-Introducing new Rndm and QA classes
-
-Revision 1.12 2000/10/27 13:54:45 morsch
-Remove explicite reference to input file from constuctor.
-
-Revision 1.11 2000/10/02 21:28:06 fca
-Removal of useless dependecies via forward declarations
-
-Revision 1.10 2000/07/11 18:24:55 fca
-Coding convention corrections + few minor bug fixes
-
-Revision 1.9 2000/06/14 15:20:09 morsch
-Include clean-up (IH)
-
-Revision 1.8 2000/06/09 20:36:44 morsch
-All coding rule violations except RS3 corrected
-
-Revision 1.7 2000/02/16 14:56:27 morsch
-Convert geant particle code into pdg code before putting particle on the stack.
-
-Revision 1.6 1999/11/09 07:38:48 fca
-Changes for compatibility with version 2.23 of ROOT
-
-Revision 1.5 1999/09/29 09:24:12 fca
-Introduction of the Copyright and cvs Log
-
-*/
-
+/* $Id$ */
// Event generator that using an instance of type AliGenReader
-// reads particles from a file and applies cuts.
-
-#include <iostream.h>
-
+// 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 "AliRun.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>
- ClassImp(AliGenExtFile)
+using std::cout;
+using std::endl;
+using std::map;
+
+ClassImp(AliGenExtFile)
AliGenExtFile::AliGenExtFile()
- :AliGenMC()
+ :AliGenMC(),
+ fFileName(0),
+ fReader(0),
+ fStartEvent(0)
{
// Constructor
//
// Read all particles
- fNpart =- 1;
- fReader = 0;
+ fNpart = -1;
}
AliGenExtFile::AliGenExtFile(Int_t npart)
- :AliGenMC(npart)
+ :AliGenMC(npart),
+ fFileName(0),
+ fReader(0),
+ fStartEvent(0)
{
// Constructor
fName = "ExtFile";
fTitle = "Primaries from ext. File";
- fReader = 0;
}
-AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile)
-{
-// copy constructor
-}
//____________________________________________________________
AliGenExtFile::~AliGenExtFile()
{
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];
- Int_t i, j, nt;
+ Int_t i=0, j, nt;
//
- for (j=0;j<3;j++) origin[j]=fOrigin[j];
- if(fVertexSmear == kPerTrack) {
- 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
while(1) {
Int_t nTracks = fReader->NextEvent();
//
// Particle selection loop
//
- // The selction criterium for the external file generator is as follows:
+ // The selection criterium for the external file generator is as follows:
//
- // 1) All tracs are subjects to the cuts defined by AliGenerator, i.e.
+ // 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
// 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;
-
- for (i = 0; i < nTracks; i++) {
- TParticle* iparticle = fReader->NextParticle();
- Int_t kf = CheckPDGCode(iparticle->GetPdgCode());
- kf = TMath::Abs(kf);
- if (ChildSelected(kf) && KinematicSelection(iparticle, 1)) {
- nSelected++;
- }
+ while ((iparticle=fReader->NextParticle()) ) {
+ Int_t kf = CheckPDGCode(iparticle->GetPdgCode());
+ kf = TMath::Abs(kf);
+ if (ChildSelected(kf) && KinematicSelection(iparticle, 1)) {
+ nSelected++;
+ }
}
if (!nSelected) continue; // No particle selected: Go to next event
fReader->RewindEvent();
}
//
- // Stack filling loop
+ // 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();
- TParticle* iparticle = fReader->NextParticle();
- if (!KinematicSelection(iparticle,0)) {
- Double_t pz = iparticle->Pz();
- Double_t e = iparticle->Energy();
- Double_t y;
- if ((e-pz) == 0) {
- y = 20.;
- } else if ((e+pz) == 0.) {
- y = -20.;
+ //
+ // 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 {
- y = 0.5*TMath::Log((e+pz)/(e-pz));
+ origin[0] = fVertex[0] + jparticle->Vx();
+ origin[1] = fVertex[1] + jparticle->Vy();
+ origin[2] = fVertex[2] + jparticle->Vz();
+ time = fTime + jparticle->T();
}
- printf("\n Not selected %d %f %f %f %f %f", i,
- iparticle->Theta(),
- iparticle->Phi(),
- iparticle->P(),
- iparticle->Pt(),
- y);
- delete iparticle;
- continue;
- }
- p[0] = iparticle->Px();
- p[1] = iparticle->Py();
- p[2] = iparticle->Pz();
- Int_t idpart = iparticle->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]));
- }
- }
- Int_t decayed = iparticle->GetFirstDaughter();
- Int_t doTracking = fTrackIt && (decayed < 0) &&
- (TMath::Abs(idpart) > 10);
- // printf("*** pdg, first daughter, trk = %d, %d, %d\n",
- // idpart,decayed, doTracking);
- SetTrack(doTracking,-1,idpart,p,origin,polar,0,kPPrimary,nt);
- KeepTrack(nt);
+ 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
- TFile *pFile=0;
- if (!gAlice) {
- gAlice = (AliRun*)pFile->Get("gAlice");
- if (gAlice) printf("AliRun object found on file\n");
- if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
- }
- TTree *fAli=gAlice->TreeK();
- if (fAli) pFile =fAli->GetCurrentFile();
- pFile->cd();
+ AliRunLoader::Instance()->CdGAFile();
}
-AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs)
-{
-// Assignment operator
- return *this;
-}
-
-
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff