#include <Riostream.h>
+#include "AliLog.h"
#include "AliGenExtFile.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>
+using std::cout;
+using std::endl;
+using std::map;
+
ClassImp(AliGenExtFile)
AliGenExtFile::AliGenExtFile()
:AliGenMC(),
fFileName(0),
- fReader(0)
+ fReader(0),
+ fStartEvent(0)
{
// Constructor
//
// Read all particles
- fNpart =- 1;
+ fNpart = -1;
}
AliGenExtFile::AliGenExtFile(Int_t npart)
:AliGenMC(npart),
fFileName(0),
- fReader(0)
+ fReader(0),
+ fStartEvent(0)
{
// Constructor
fName = "ExtFile";
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;
+ Int_t i=0, j, nt;
//
//
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();
if (nTracks == 0) {
fReader->RewindEvent();
}
+ //
+ // 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 = KinematicSelection(jparticle,0);
- if (!selected) continue;
+ 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)
{
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));
- Int_t doTracking = fTrackIt && selected && !(jparticle->TestBit(kTransportBit));
- Int_t parent = jparticle->GetFirstMother();
-
- PushTrack(doTracking, parent, idpart, p, origin, polar, 0, kPPrimary, nt);
+ 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();
+ AliGenEventHeader * header = fReader->GetGenEventHeader();
+ if (!header) header = new AliGenEventHeader();
header->SetNProduced(fNprimaries);
header->SetPrimaryVertex(fVertex);
+ header->SetInteractionTime(fTime);
AddHeader(header);
break;
CdEventFile();
}
+//___________________________________________________________
void AliGenExtFile::CdEventFile()
{
// CD back to the event file
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff