// 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);
+// AliGenExtFile *gener = new AliGenExtFile(-1);
// gener->SetMomentumRange(0,999);
// gener->SetPhiRange(-180.,180.);
// gener->SetThetaRange(0,180);
#include <Riostream.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>
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):
- AliGenMC(ExtFile)
-{
-// Copy constructor
- ExtFile.Copy(*this);
-}
//____________________________________________________________
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 = 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;
}
- }
+ TParticle* iparticle = 0x0;
+ while ((iparticle=fReader->NextParticle()) ) ;
+ cout << "Skipping event " << ie << endl;
+ }
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 tracks 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
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++;
- }
+ 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
//
+ fNprimaries = 0;
for (i = 0; i < nTracks; i++) {
-
- TParticle* iparticle = fReader->NextParticle();
- Bool_t selected = KinematicSelection(iparticle,0);
- if (!selected) {
- 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.;
+ TParticle* jparticle = fReader->NextParticle();
+ Bool_t selected = KinematicSelection(jparticle,0);
+ if (!selected) continue;
+ 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);
- //PH 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) && selected;
- // printf("*** pdg, first daughter, trk = %d, %d, %d\n",
- // idpart,decayed, doTracking);
- //PH PushTrack(doTracking,-1,idpart,p,origin,polar,0,kPPrimary,nt);
- Int_t parent = iparticle->GetFirstMother();
- PushTrack(doTracking,parent,idpart,p,origin,polar,0,kPPrimary,nt);
- KeepTrack(nt);
+ Int_t doTracking = fTrackIt && selected && (jparticle->TestBit(kTransportBit));
+ Int_t parent = jparticle->GetFirstMother();
+
+ 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 = 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();
-}
-
-
-AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs)
-{
-// Assignment operator
- rhs.Copy(*this);
- return *this;
-}
-
-
-void AliGenExtFile::Copy(TObject&) const
-{
- //
- // Copy
- //
- Fatal("Copy","Not implemented!\n");
+ AliRunLoader::Instance()->CdGAFile();
}
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff