/*
$Log$
+Revision 1.24 2002/10/21 09:20:51 alibrary
+Introduce Riostream.h and remove unused variables
+
+Revision 1.23 2002/10/14 14:55:35 hristov
+Merging the VirtualMC branch to the main development branch (HEAD)
+
+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
*/
-// Event generator that can read the old ALICE event format based on CW-ntuples
-// http://consult.cern.ch/alice/Internal_Notes/1995/32/abstract
-// .cwn file have to be converted to .root using h2root
-// Use SetFileName(file) to read from "file"
-// Author: andreas.morsch@cern.ch
+// Event generator that using an instance of type AliGenReader
+// reads particles from a file and applies cuts.
-#include <iostream.h>
+#include <Riostream.h>
#include "AliGenExtFile.h"
-#include "AliMC.h"
#include "AliRun.h"
-#include <TDirectory.h>
-#include <TDatabasePDG.h>
+#include <TParticle.h>
#include <TFile.h>
-#include "TTree.h"
-#include <stdlib.h>
+#include <TTree.h>
+
ClassImp(AliGenExtFile)
- AliGenExtFile::AliGenExtFile()
- :AliGenerator(-1)
+
+AliGenExtFile::AliGenExtFile()
+ :AliGenMC()
{
// Constructor
- fName="ExtFile";
- fTitle="Primaries from ext. File";
- fFileName="";
- fTreeNtuple=0;
- fNcurrent=0;
//
// Read all particles
- fNpart=-1;
+ fNpart =- 1;
+ fReader = 0;
}
AliGenExtFile::AliGenExtFile(Int_t npart)
- :AliGenerator(npart)
+ :AliGenMC(npart)
{
// Constructor
- fName="ExtFile";
- fTitle="Primaries from ext. File";
- fFileName="";
- fTreeNtuple=0;
- fNcurrent=0;
+ fName = "ExtFile";
+ fTitle = "Primaries from ext. File";
+ fReader = 0;
}
AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile)
AliGenExtFile::~AliGenExtFile()
{
// Destructor
- delete fTreeNtuple;
+ 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 *pFile=0;
- if (fTreeNtuple==0) {
- if (!pFile) {
- pFile = new TFile(fFileName);
- pFile->cd();
- cout<<"I have opened "<<fFileName<<" file "<<endl;
- }
-// get the tree address in the Fluka boundary source file
- fTreeNtuple = (TTree*)gDirectory->Get("h888");
- } else {
- pFile = fTreeNtuple->GetCurrentFile();
- pFile->cd();
- }
-
- TTree *h2=fTreeNtuple;
-//Set branch addresses
-//Set branch addresses
- h2->SetBranchAddress("Nihead",&fNihead);
- h2->SetBranchAddress("Ihead",fIhead);
- h2->SetBranchAddress("Nrhead",&fNrhead);
- h2->SetBranchAddress("Rhead",fRhead);
- h2->SetBranchAddress("Idpart",&fIdpart);
- h2->SetBranchAddress("Theta",&fTheta);
- h2->SetBranchAddress("Phi",&fPhi);
- h2->SetBranchAddress("P",&fP);
- h2->SetBranchAddress("E",&fE);
+// Initialize
+ if (fReader) fReader->Init();
}
-
-//____________________________________________________________
+
void AliGenExtFile::Generate()
{
// Generate particles
- Float_t polar[3]= {0,0,0};
+ Float_t polar[3] = {0,0,0};
//
- Float_t origin[3]={0,0,0};
+ Float_t origin[3] = {0,0,0};
Float_t p[3];
Float_t random[6];
- Float_t prwn;
- Int_t i, j, nt, nTracks=0;
+ Int_t i, 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=fIhead[4];
- Int_t i6=fIhead[5];
-
for (j=0;j<3;j++) origin[j]=fOrigin[j];
- if(fVertexSmear==kPerTrack) {
+ if(fVertexSmear == kPerTrack) {
Rndm(random,6);
- for (j=0;j<3;j++) {
- origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
+ 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 (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++) {
- fIdpart=gMC->PDGFromId(fIdpart);
- Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass();
- if(fE<=amass) {
- Warning("Generate","Particle %d no %d E = %f mass = %f %f %f \n",
- fIdpart,i,fE,amass, fPhi, fTheta);
- prwn=0;
- } else {
- prwn=sqrt((fE+amass)*(fE-amass));
+ }
+
+ //
+ // Particle selection loop
+ //
+ // The selction criterium for the external file generator is as follows:
+ //
+ // 1) All tracs are subjects 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.
+ 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++;
+ }
}
+ if (!nSelected) continue; // No particle selected: Go to next event
+ fReader->RewindEvent();
+ }
- fTheta *= TMath::Pi()/180.;
- fPhi = (fPhi-180)*TMath::Pi()/180.;
- if(fTheta<fThetaMin || fTheta>fThetaMax ||
- fPhi<fPhiMin || fPhi>fPhiMax ||
- prwn<fPMin || prwn>fPMax)
- {
- ;
- } else {
- p[0]=prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi);
- p[1]=prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi);
- p[2]=prwn*TMath::Cos(fTheta);
-
- 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]));
- }
+ //
+ // Stack filling loop
+ //
+ for (i = 0; i < nTracks; i++) {
+
+ 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.;
+ } else {
+ y = 0.5*TMath::Log((e+pz)/(e-pz));
+ }
+ 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]));
}
- gAlice->SetTrack(fTrackIt,-1,fIdpart,p,origin,polar,0,kPPrimary,nt);
}
- fNcurrent++;
- nb = (Int_t)h2->GetEvent(fNcurrent);
+ 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);
+ } // track loop
+
+ 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");
}
-
- 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();
+ TTree *fAli=gAlice->TreeK();
+ if (fAli) pFile =fAli->GetCurrentFile();
+ pFile->cd();
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff