New class used for primary vertex finding (AliITSVertexerTracks)

[u/mrichter/AliRoot.git] / EVGEN / AliGenFLUKAsource.cxx

diff --git a/EVGEN/AliGenFLUKAsource.cxx b/EVGEN/AliGenFLUKAsource.cxx
index 255ffb672760d78c64b6578377cc77cdae1b6619..8cf95bd5b018db7bdd2ec3dc0c629af6f5eb9334 100644 (file)
--- a/EVGEN/AliGenFLUKAsource.cxx
+++ b/EVGEN/AliGenFLUKAsource.cxx
@@ -15,6 +15,26 @@
 
 /*
 $Log$
+Revision 1.16  2002/11/21 16:22:35  alibrary
+Removing AliMCProcess and AliMC
+
+Revision 1.15  2001/07/27 17:09:36  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 1.14  2001/03/21 11:28:20  morsch
+Use enum constants for particle selection.
+
+Revision 1.13  2000/12/21 16:24:06  morsch
+Coding convention clean-up
+
+Revision 1.12  2000/11/30 07:12:50  alibrary
+Introducing new Rndm and QA classes
+
+Revision 1.11  2000/06/14 15:20:40  morsch
+Include clean-up (IH)
+
 Revision 1.10  2000/06/09 20:31:34  morsch
 All coding rule violations except RS3 corrected
 
@@ -33,10 +53,18 @@ Introduction of the Copyright and cvs Log
 
 */
 
+
+
+// Read background particles from a FLUKA boundary source file
+// This is a very special generator that works for background studies for the muon-spectrometer.
+// The input files come from FLUKA simulations.
+// Files can be chained. 
+// Author: andreas.morsch@cern.ch
+
+#include "TPDGCode.h"
+
 #include "AliGenFLUKAsource.h"
-#include "AliMC.h"
 #include "AliRun.h"
-#include "AliPDG.h"
 
 
 #include <TFile.h>
@@ -63,23 +91,21 @@ Introduction of the Copyright and cvs Log
     // whole volume of the MUON Arm 
     fZshift=0;
     // Set the default file 
-    fFileName="flukasource.root";
+    fFileName="";
 
     fTreeFluka=0;
     fTreeChain = new TChain("h1");
 //
 //  Read all particles
     fNpart=-1;
-
-    
 }
 
 AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
     :AliGenerator(npart)
 {
     // Constructor
-    fName="FLUKA";
-    fTitle="FLUKA Boundary Source";
+    fName  = "FLUKA";
+    fTitle = "FLUKA Boundary Source";
     // Read in all particle types by default
     fIkine=6;
     // Set maximum admitted age of particles to 1.e-05 by default 
@@ -93,7 +119,7 @@ AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
     // whole volume of the MUON Arm 
     fZshift=0;
     // Set the default file 
-    fFileName="flukasource.root";
+    fFileName="";
 
     fTreeFluka=0;
     fTreeChain = new TChain("h1"); 
@@ -151,7 +177,6 @@ void AliGenFLUKAsource::FlukaInit()
 void AliGenFLUKAsource::Generate()
 {
 // Generate one event 
-    AliMC* gMC = AliMC::GetMC();
 
     const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
                          kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
@@ -179,7 +204,8 @@ void AliGenFLUKAsource::Generate()
     TChain *h2=fTreeChain;
     Int_t nentries = (Int_t) h2->GetEntries();
     if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
-  
+    
+
   // loop over number of particles
     Int_t nb=0;
     Int_t ev=gMC->CurrentEvent();
@@ -201,27 +227,31 @@ void AliGenFLUKAsource::Generate()
            printf("Generate - I'm out \n");
            return;
        }   
+       
+       Int_t ifip = Int_t(fIp);
+       
 
        if (fSourceId != -1 && fIgas !=fSourceId) {
            irwn++;
            continue;
        }
        
-       if (fIp > 28 || fIp < 0) {
+       if (ifip > 28 || ifip < 0) {
            irwn++;
            continue;
        }
        
-       if ((fIp != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) || fAge > fAgeMax){
+       if ((ifip != fIkine && fIkine != kAll && fIkine != kCharged 
+            && fIkine != 10) || fAge > fAgeMax){
            irwn++;
            continue;
-       } else if (fIkine == 9) {
-           if (fIp == 7 || fIp == 8 || fAge > fAgeMax) { 
+       } else if (fIkine == kCharged) {
+           if (ifip == 7 || ifip == 8 || fAge > fAgeMax) { 
                irwn++;
                continue;
            }
-       } else if (fIkine == 10) {
-           if (fIp == 8 || fAge > fAgeMax) { 
+       } else if (fIkine == kNoNeutron) {
+           if (ifip == 8 || fAge > fAgeMax) { 
                irwn++;
                continue;
            }
@@ -230,8 +260,8 @@ void AliGenFLUKAsource::Generate()
 
        irwn++;
 //
-// PDG code from FLUKA particle type (fIp)
-       part=kIfluge[int(fIp)-1];       
+// PDG code from FLUKA particle type (ifip)
+       part=kIfluge[int(ifip)-1];      
 //
 // Calculate momentum from kinetic energy and mass of the particle
        gMC->Gfpart(part, name, itrtyp,  
@@ -251,13 +281,13 @@ void AliGenFLUKAsource::Generate()
        wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
        iwgt=Int_t(wgt);
        fwgt=wgt-Float_t(iwgt);
-       gMC->Rndm(random,2);
+       Rndm(random,2);
        if (random[0] < fwgt) iwgt++;
        if (part==1 && iwgt>100) iwgt=100;
        Int_t nstack=0;
        for (j=0; j<iwgt; j++) {
-           gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,"Primary",nt);
-           gMC->Rndm(random,2);
+           SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,kPPrimary,nt);
+           Rndm(random,2);
            phi=2*random[1]*TMath::Pi();
            Float_t pn1=p[0]*TMath::Sin(phi) - p[1]*TMath::Cos(phi);
            Float_t pn2=p[0]*TMath::Cos(phi) + p[1]*TMath::Sin(phi);