* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-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.
+// 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 <iostream.h>
+
+#include <Riostream.h>
#include "AliGenExtFile.h"
-#include "AliRun.h"
+#include "AliRunLoader.h"
+#include "AliHeader.h"
+#include "AliGenEventHeader.h"
#include <TParticle.h>
#include <TFile.h>
#include <TTree.h>
- ClassImp(AliGenExtFile)
- AliGenExtFile::AliGenExtFile()
- :AliGenerator(-1)
+ClassImp(AliGenExtFile)
+
+AliGenExtFile::AliGenExtFile()
+ :AliGenMC(),
+ fFileName(0),
+ fReader(0)
{
// Constructor
//
// Read all particles
fNpart =- 1;
- fReader = 0;
}
AliGenExtFile::AliGenExtFile(Int_t npart)
- :AliGenerator(npart)
+ :AliGenMC(npart),
+ fFileName(0),
+ fReader(0)
{
// Constructor
fName = "ExtFile";
fTitle = "Primaries from ext. File";
- fReader = 0;
}
-AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile)
-{
-// copy constructor
-}
//____________________________________________________________
AliGenExtFile::~AliGenExtFile()
{
Float_t origin[3] = {0,0,0};
Float_t p[3];
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();
- Int_t nTracks = fReader->NextEvent();
- if (nTracks == 0) {
- printf("\n No more events !!! !\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;
- }
-
- for (i = 0; i < nTracks; i++) {
-
-
- TParticle* iparticle = fReader->NextParticle();
- Double_t theta = iparticle->Theta();
- Double_t phi = iparticle->Phi();
- if (phi > TMath::Pi()) phi -= 2.*TMath::Pi();
- Double_t pmom = iparticle->P();
- Double_t pz = iparticle->Pz();
- Double_t e = iparticle->Energy();
- Double_t pt = iparticle->Pt();
- Double_t y;
- if ((e-pz) == 0) {
- y = 20.;
- } else if ((e+pz) == 0.) {
- y = -20.;
- } else {
- y = 0.5*TMath::Log((e+pz)/(e-pz));
- }
-
- if(theta < fThetaMin || theta > fThetaMax ||
- phi < fPhiMin || phi > fPhiMax ||
- pmom < fPMin || pmom > fPMax ||
- pt < fPtMin || pt > fPtMax ||
- y < fYMin || y > fYMax )
- {
- printf("\n Not selected %d %f %f %f %f %f", i, theta, phi, pmom, 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]));
+ }
+
+ //
+ // 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++;
}
}
- SetTrack(fTrackIt,-1,idpart,p,origin,polar,0,kPPrimary,nt);
- }
- TFile *pFile=0;
-// Get AliRun object or create it
- 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();
-}
+ 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) 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]));
+ }
+ } else {
+ origin[0] = fVertex[0] + iparticle->Vx();
+ origin[1] = fVertex[1] + iparticle->Vy();
+ origin[2] = fVertex[2] + iparticle->Vz();
+ }
+
+ Int_t decayed = iparticle->GetFirstDaughter();
+ Int_t doTracking = fTrackIt && (decayed < 0) && (TMath::Abs(idpart) > 10) && selected;
+ Int_t parent = iparticle->GetFirstMother();
+
+ PushTrack(doTracking,parent,idpart,p,origin,polar,0,kPPrimary,nt);
+ KeepTrack(nt);
+ fNprimaries++;
+ } // track loop
+
+ // Generated event header
+
+ AliGenEventHeader * header = new AliGenEventHeader();
+ header->SetNProduced(fNprimaries);
+ header->SetPrimaryVertex(fVertex);
+ AddHeader(header);
+ break;
+
+ } // event loop
+
+ SetHighWaterMark(nt);
+ CdEventFile();
+}
-AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs)
+void AliGenExtFile::CdEventFile()
{
-// Assignment operator
- return *this;
+// CD back to the event file
+ (AliRunLoader::GetRunLoader())->CdGAFile();
}
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff