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

#include "AliGenFLUKAsource.h"
#include "AliGenMUONlib.h"
#include "AliMC.h"
#include "AliRun.h"
#include <TDirectory.h>
#include <TFile.h>
#include <TTree.h>
#include <stdlib.h>
 ClassImp(AliGenFLUKAsource)
     AliGenFLUKAsource::AliGenFLUKAsource()
	 :AliGenerator(-1)
{
    //
    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 
    fAgeMax=1.e-05;
    // Do not add weight
    fAddWeight=1.;
    // Shift the z-coordinate of the impact point by 4.5 cm only if it reads 
    // from  specific boundary source to the chamber (fZshift=4.5;),else there 
    // is no need to shift as it reads boundary source for the whole volume of 
    // the Muon Arm; the default value corresponds to boundary source for the
    // whole volume of the MUON Arm 
    fZshift=0;
    // Set the default file 
    fFileName="flukasource.root";

    fTreeFluka=0;
//
//  Read all particles
    fNpart=-1;
    
}

AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
    :AliGenerator(npart)
{
    //
    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 
    fAgeMax=1.e-05;
    // Do not add weight
    fAddWeight=1.;
    // Shift the z-coordinate of the impact point by 4.5 cm only if it reads 
    // from  specific boundary source to the chamber (fZshift=4.5;),else there 
    // is no need to shift as it reads boundary source for the whole volume of 
    // the Muon Arm; the default value corresponds to boundary source for the
    // whole volume of the MUON Arm 
    fZshift=0;
    // Set the default file 
    fFileName="flukasource.root";

    fTreeFluka=0;

}

//____________________________________________________________
AliGenFLUKAsource::~AliGenFLUKAsource()
{
    delete fTreeFluka;
}

//____________________________________________________________
void AliGenFLUKAsource::FlukaInit() 
{
//
// reset the existing file environment and open a new root file if
// the pointer to the Fluka tree is null
    
    TFile *File=0;
    if (fTreeFluka==0) {
        if (!File) {
	    File = new TFile(fFileName);
	    File->cd();
	    cout<<"I have opened "<<fFileName<<" file "<<endl;
        }
// get the tree address in the Fluka boundary source file
	fTreeFluka = (TTree*)gDirectory->Get("h1");
    } else {
        File = fTreeFluka->GetCurrentFile();
        File->cd();
    }

    TTree *h2=fTreeFluka;
//Set branch addresses
    h2->SetBranchAddress("Ip",&Ip);
    h2->SetBranchAddress("Ipp",&Ipp);
    h2->SetBranchAddress("Xi",&Xi);
    h2->SetBranchAddress("Yi",&Yi);
    h2->SetBranchAddress("Zi",&Zi);
    h2->SetBranchAddress("Px",&Px);
    h2->SetBranchAddress("Py",&Py);
    h2->SetBranchAddress("Pz",&Pz);
    h2->SetBranchAddress("Ekin",&Ekin);
    h2->SetBranchAddress("Zv",&Zv);
    h2->SetBranchAddress("Rv",&Rv);
    h2->SetBranchAddress("Itra",&Itra);
    h2->SetBranchAddress("Igas",&Igas);
    h2->SetBranchAddress("Wgt",&Wgt);
    h2->SetBranchAddress("Etag",&Etag);
    h2->SetBranchAddress("Ptg",&Ptg);
    h2->SetBranchAddress("Age",&Age);
}

//____________________________________________________________
void AliGenFLUKAsource::Generate()
{

  AliMC* pMC = AliMC::GetMC();

  const Int_t ifluge[28]={14, 15, 3, 2, 4, 4, 1, 13, 25, 5, 6, 10, 8, 9,
                         11, 12,18, 26, 16, 21, 19, 20, 7, 16,16,0,0,0};
  Float_t polar[3]= {0,0,0};
  //
  Float_t origin[3];
  Float_t p[3];
  Float_t prwn;
  Float_t wgt, fwgt;
  Float_t phi;
  char name[100];
  Float_t amass, charge, tlife;
  Int_t itrtyp;
  Int_t iwgt;
  Int_t i, j, part, nt;
  static Int_t irwn;
  //
  Float_t random[2];
  //
  FlukaInit();
  TTree *h2=fTreeFluka;
  Int_t nentries = (Int_t) h2->GetEntries();
  if (fNpart == -1) fNpart=nentries;
  
  // loop over number of particles
  Int_t nb=0;
  for (i=0; i<fNpart;i++) {
    Int_t ev=pMC->CurrentEvent();
    Int_t entry=fNpart*(ev-1)+i; 
    nb = (Int_t)h2->GetEvent(entry); 
    if (irwn > nentries) {
      printf("No more entries in the FLUKA boundary source file\n");
      return;
    }   
    if (Ip > 28 || Ip < 0) {
      irwn++;
      continue;
    }
 
    if ((Ip != fIkine && fIkine != 6 && fIkine != 9) || Age > fAgeMax){
       irwn++;
       continue;
    } else if (fIkine == 9) {
       if (Ip == 7 || Ip == 8 || Age > fAgeMax) { 
          irwn++;
          continue;
       }
    }
    

    irwn++;
    printf("\n Particle type: %f \n \n ", Ip);
    
    if (Ip ==7){
       prwn=Ekin;
       part=1;
    } else if (Ip == 8) {
       prwn=sqrt(Ekin*Ekin + 2.*0.93956563);
       part=13;
    } else {
       part=ifluge[int(Ip)-1];
       pMC->Gfpart(part, name, itrtyp,  
		   amass, charge, tlife); 
       prwn=sqrt(Ekin*Ekin + 2.*amass);
    }
    origin[0]=Xi;
    origin[1]=Yi;
    origin[2]=Zi;

    p[0]=Px*prwn;
    p[1]=Py*prwn;
    p[2]=Pz*prwn;

    //handle particle weight correctly
    wgt = (part == 13) ? Wgt*fAddWeight : Wgt;
    iwgt=Int_t(wgt);
    fwgt=wgt-Float_t(iwgt);
    pMC->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(1,-1,part,p,origin,polar,0,"Primary",nt);
	pMC->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);
	p[0]=pn1;
	p[1]=pn2;
	Float_t on1=origin[0]*TMath::Sin(phi)-origin[1]*TMath::Cos(phi);
	Float_t on2=origin[0]*TMath::Cos(phi)+origin[1]*TMath::Sin(phi);
	origin[0]=on1;
	origin[1]=on2;
	nstack++;
    }
    if (nstack == 0) continue;
  }
 
    TFile *File=0;
// Get AliRun object or create it 
    if (!gAlice) {
	gAlice = (AliRun*)File->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) File =fAli->GetCurrentFile();
    File->cd();
}
Commit	Line	Data
fe4da5cc	1	#include "AliGenFLUKAsource.h"
	2	#include "AliGenMUONlib.h"
	3	#include "AliMC.h"
	4	#include "AliRun.h"
	5	#include <TDirectory.h>
	6	#include <TFile.h>
	7	#include <TTree.h>
	8	#include <stdlib.h>
	9	ClassImp(AliGenFLUKAsource)
	10	AliGenFLUKAsource::AliGenFLUKAsource()
	11	:AliGenerator(-1)
	12	{
	13	//
	14	fName="FLUKA";
	15	fTitle="FLUKA Boundary Source";
	16	// Read in all particle types by default
	17	fIkine=6;
	18	// Set maximum admitted age of particles to 1.e-05 by default
	19	fAgeMax=1.e-05;
	20	// Do not add weight
	21	fAddWeight=1.;
	22	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	23	// from specific boundary source to the chamber (fZshift=4.5;),else there
	24	// is no need to shift as it reads boundary source for the whole volume of
	25	// the Muon Arm; the default value corresponds to boundary source for the
	26	// whole volume of the MUON Arm
	27	fZshift=0;
	28	// Set the default file
	29	fFileName="flukasource.root";
	30
	31	fTreeFluka=0;
	32	//
	33	// Read all particles
	34	fNpart=-1;
	35
	36	}
	37
	38	AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
	39	:AliGenerator(npart)
	40	{
	41	//
	42	fName="FLUKA";
	43	fTitle="FLUKA Boundary Source";
	44	// Read in all particle types by default
	45	fIkine=6;
	46	// Set maximum admitted age of particles to 1.e-05 by default
	47	fAgeMax=1.e-05;
	48	// Do not add weight
	49	fAddWeight=1.;
	50	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	51	// from specific boundary source to the chamber (fZshift=4.5;),else there
	52	// is no need to shift as it reads boundary source for the whole volume of
	53	// the Muon Arm; the default value corresponds to boundary source for the
	54	// whole volume of the MUON Arm
	55	fZshift=0;
	56	// Set the default file
	57	fFileName="flukasource.root";
	58
	59	fTreeFluka=0;
	60
	61	}
	62
	63	//____________________________________________________________
	64	AliGenFLUKAsource::~AliGenFLUKAsource()
65	{
66	delete fTreeFluka;
67	}
68
69	//____________________________________________________________
70	void AliGenFLUKAsource::FlukaInit()
71	{
72	//
73	// reset the existing file environment and open a new root file if
74	// the pointer to the Fluka tree is null
75
76	TFile *File=0;
77	if (fTreeFluka==0) {
78	if (!File) {
79	File = new TFile(fFileName);
80	File->cd();
81	cout<<"I have opened "<<fFileName<<" file "<<endl;
82	}
83	// get the tree address in the Fluka boundary source file
84	fTreeFluka = (TTree*)gDirectory->Get("h1");
85	} else {
86	File = fTreeFluka->GetCurrentFile();
87	File->cd();
88	}
89
90	TTree *h2=fTreeFluka;
91	//Set branch addresses
92	h2->SetBranchAddress("Ip",&Ip);
93	h2->SetBranchAddress("Ipp",&Ipp);
94	h2->SetBranchAddress("Xi",&Xi);
95	h2->SetBranchAddress("Yi",&Yi);
96	h2->SetBranchAddress("Zi",&Zi);
97	h2->SetBranchAddress("Px",&Px);
98	h2->SetBranchAddress("Py",&Py);
99	h2->SetBranchAddress("Pz",&Pz);
100	h2->SetBranchAddress("Ekin",&Ekin);
101	h2->SetBranchAddress("Zv",&Zv);
102	h2->SetBranchAddress("Rv",&Rv);
103	h2->SetBranchAddress("Itra",&Itra);
104	h2->SetBranchAddress("Igas",&Igas);
105	h2->SetBranchAddress("Wgt",&Wgt);
106	h2->SetBranchAddress("Etag",&Etag);
107	h2->SetBranchAddress("Ptg",&Ptg);
108	h2->SetBranchAddress("Age",&Age);
109	}
110
111	//____________________________________________________________
112	void AliGenFLUKAsource::Generate()
113	{
114
115	AliMC* pMC = AliMC::GetMC();
116
117	const Int_t ifluge[28]={14, 15, 3, 2, 4, 4, 1, 13, 25, 5, 6, 10, 8, 9,
118	11, 12,18, 26, 16, 21, 19, 20, 7, 16,16,0,0,0};
119	Float_t polar[3]= {0,0,0};
120	//
121	Float_t origin[3];
122	Float_t p[3];
123	Float_t prwn;
124	Float_t wgt, fwgt;
125	Float_t phi;
126	char name[100];
127	Float_t amass, charge, tlife;
128	Int_t itrtyp;
129	Int_t iwgt;
130	Int_t i, j, part, nt;
131	static Int_t irwn;
132	//
133	Float_t random[2];
134	//
135	FlukaInit();
136	TTree *h2=fTreeFluka;
137	Int_t nentries = (Int_t) h2->GetEntries();
138	if (fNpart == -1) fNpart=nentries;
139
140	// loop over number of particles
141	Int_t nb=0;
142	for (i=0; i<fNpart;i++) {
143	Int_t ev=pMC->CurrentEvent();
144	Int_t entry=fNpart*(ev-1)+i;
145	nb = (Int_t)h2->GetEvent(entry);
146	if (irwn > nentries) {
147	printf("No more entries in the FLUKA boundary source file\n");
148	return;
149	}
150	if (Ip > 28 \|\| Ip < 0) {
151	irwn++;
152	continue;
153	}
154
155	if ((Ip != fIkine && fIkine != 6 && fIkine != 9) \|\| Age > fAgeMax){
156	irwn++;
157	continue;
158	} else if (fIkine == 9) {
159	if (Ip == 7 \|\| Ip == 8 \|\| Age > fAgeMax) {
160	irwn++;
161	continue;
162	}
163	}
164
165
166	irwn++;
167	printf("\n Particle type: %f \n \n ", Ip);
168
169	if (Ip ==7){
170	prwn=Ekin;
171	part=1;
172	} else if (Ip == 8) {
173	prwn=sqrt(EkinEkin + 2.0.93956563);
174	part=13;
175	} else {
176	part=ifluge[int(Ip)-1];
177	pMC->Gfpart(part, name, itrtyp,
178	amass, charge, tlife);
179	prwn=sqrt(EkinEkin + 2.amass);
180	}
181	origin[0]=Xi;
182	origin[1]=Yi;
183	origin[2]=Zi;
184
185	p[0]=Px*prwn;
186	p[1]=Py*prwn;
187	p[2]=Pz*prwn;
188
189	//handle particle weight correctly
190	wgt = (part == 13) ? Wgt*fAddWeight : Wgt;
191	iwgt=Int_t(wgt);
192	fwgt=wgt-Float_t(iwgt);
193	pMC->Rndm(random,2);
194	if (random[0] < fwgt) iwgt++;
195	if (part==1 && iwgt>100) iwgt=100;
196	Int_t nstack=0;
197	for (j=0; j<iwgt; j++) {
198	gAlice->SetTrack(1,-1,part,p,origin,polar,0,"Primary",nt);
199	pMC->Rndm(random,2);
200	phi=2random[1]TMath::Pi();
201	Float_t pn1=p[0]TMath::Sin(phi) - p[1]TMath::Cos(phi);
202	Float_t pn2=p[0]TMath::Cos(phi) + p[1]TMath::Sin(phi);
203	p[0]=pn1;
204	p[1]=pn2;
205	Float_t on1=origin[0]TMath::Sin(phi)-origin[1]TMath::Cos(phi);
206	Float_t on2=origin[0]TMath::Cos(phi)+origin[1]TMath::Sin(phi);
207	origin[0]=on1;
208	origin[1]=on2;
209	nstack++;
210	}
211	if (nstack == 0) continue;
212	}
213
214	TFile *File=0;
215	// Get AliRun object or create it
216	if (!gAlice) {
217	gAlice = (AliRun*)File->Get("gAlice");
218	if (gAlice) printf("AliRun object found on file\n");
219	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
220	}
221	TTree *fAli=gAlice->TreeK();
222	if (fAli) File =fAli->GetCurrentFile();
223	File->cd();
224	}
225
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