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

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
$Log$
Revision 1.10  2000/06/09 20:31:34  morsch
All coding rule violations except RS3 corrected

Revision 1.9  2000/03/07 13:52:54  morsch
static Int_t irwn=0;

Revision 1.8  2000/02/14 14:49:38  morsch
Correct particle type for gamma and neutrons
More consistent calculation of momentum from kin. energy and mass

Revision 1.7  1999/11/03 17:43:20  fca
New version from G.Martinez & A.Morsch

Revision 1.6  1999/09/29 09:24:12  fca
Introduction of the Copyright and cvs Log

*/

#include "AliGenFLUKAsource.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliPDG.h"


#include <TFile.h>
#include <TTree.h>
#include <TChain.h>
#include <stdlib.h>
 ClassImp(AliGenFLUKAsource)
     AliGenFLUKAsource::AliGenFLUKAsource()
	 :AliGenerator(-1)
{
    // Constructor
    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;
    fTreeChain = new TChain("h1");
//
//  Read all particles
    fNpart=-1;

    
}

AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
    :AliGenerator(npart)
{
    // Constructor
    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;
    fTreeChain = new TChain("h1"); 
    fSourceId=-1;
}

AliGenFLUKAsource::AliGenFLUKAsource(const AliGenFLUKAsource & FLUKAsource)
{
// copy constructor
}


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

void AliGenFLUKAsource::AddFile(const Text_t *filename)
{
// Add a file to the chain
    fTreeChain->Add(filename);
    
}


//____________________________________________________________
void AliGenFLUKAsource::FlukaInit() 
{
// Set branch addresses of data entries
    TChain *h2=fTreeChain;
//Set branch addresses
    h2->SetBranchAddress("Ip",&fIp);
    h2->SetBranchAddress("Ipp",&fIpp);
    h2->SetBranchAddress("Xi",&fXi);
    h2->SetBranchAddress("Yi",&fYi);
    h2->SetBranchAddress("Zi",&fZi);
    h2->SetBranchAddress("Px",&fPx);
    h2->SetBranchAddress("Py",&fPy);
    h2->SetBranchAddress("Pz",&fPz);
    h2->SetBranchAddress("Ekin",&fEkin);
    h2->SetBranchAddress("Zv",&fZv);
    h2->SetBranchAddress("Rv",&fRv);
    h2->SetBranchAddress("Itra",&fItra);
    h2->SetBranchAddress("Igas",&fIgas);
    h2->SetBranchAddress("Wgt",&fWgt);
    h2->SetBranchAddress("Etag",&fEtag);
    h2->SetBranchAddress("Ptg",&fPtg);
    h2->SetBranchAddress("Age",&fAge);
}

//____________________________________________________________
void AliGenFLUKAsource::Generate()
{
// Generate one event 
    AliMC* gMC = AliMC::GetMC();

    const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
			  kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
			  kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
			  kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
			  kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
			  0,kNuMu,kNuMuBar};
    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=0;
    //
    Float_t random[2];
  //
    FlukaInit();
    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();
    for (i=0; i<fNpart;i++) {
	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");
	    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();
	    printf("Generate - I'm out \n");
	    return;
	}   

	if (fSourceId != -1 && fIgas !=fSourceId) {
	    irwn++;
	    continue;
	}
	
	if (fIp > 28 || fIp < 0) {
	    irwn++;
	    continue;
	}
	
	if ((fIp != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) || fAge > fAgeMax){
	    irwn++;
	    continue;
	} else if (fIkine == 9) {
	    if (fIp == 7 || fIp == 8 || fAge > fAgeMax) { 
		irwn++;
		continue;
	    }
	} else if (fIkine == 10) {
	    if (fIp == 8 || fAge > fAgeMax) { 
		irwn++;
		continue;
	    }
	}
    

	irwn++;
//
// PDG code from FLUKA particle type (fIp)
	part=kIfluge[int(fIp)-1];	
//
// Calculate momentum from kinetic energy and mass of the particle
	gMC->Gfpart(part, name, itrtyp,  
		    amass, charge, tlife); 
	prwn=fEkin*sqrt(1. + 2.*amass/fEkin);


	origin[0]=fYi;
	origin[1]=fXi;
	origin[2]=fZi;
	
	p[0]=fPy*prwn;
	p[1]=fPx*prwn;
	p[2]=fPz*prwn;

	//handle particle weight correctly
	wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
	iwgt=Int_t(wgt);
	fwgt=wgt-Float_t(iwgt);
	gMC->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);
	    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 *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();
}


AliGenFLUKAsource& AliGenFLUKAsource::operator=(const  AliGenFLUKAsource& rhs)
{
// Assignment operator
    return *this;
}
Commit	Line	Data
4c039060	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
5c3fd7ea	18	Revision 1.10 2000/06/09 20:31:34 morsch
	19	All coding rule violations except RS3 corrected
	20
f87cfe57	21	Revision 1.9 2000/03/07 13:52:54 morsch
	22	static Int_t irwn=0;
	23
e7bafa6d	24	Revision 1.8 2000/02/14 14:49:38 morsch
	25	Correct particle type for gamma and neutrons
	26	More consistent calculation of momentum from kin. energy and mass
	27
02769dba	28	Revision 1.7 1999/11/03 17:43:20 fca
	29	New version from G.Martinez & A.Morsch
	30
886b6f73	31	Revision 1.6 1999/09/29 09:24:12 fca
	32	Introduction of the Copyright and cvs Log
	33
4c039060	34	*/
4c039060	35
fe4da5cc	36	#include "AliGenFLUKAsource.h"
fe4da5cc	37	#include "AliMC.h"
fe4da5cc	38	#include "AliRun.h"
c5970876	39	#include "AliPDG.h"
5c3fd7ea	40
5c3fd7ea	41
fe4da5cc	42	#include <TFile.h>
fe4da5cc	43	#include <TTree.h>
f87cfe57	44	#include <TChain.h>
fe4da5cc	45	#include <stdlib.h>
	46	ClassImp(AliGenFLUKAsource)
	47	AliGenFLUKAsource::AliGenFLUKAsource()
	48	:AliGenerator(-1)
	49	{
f87cfe57	50	// Constructor
fe4da5cc	51	fName="FLUKA";
	52	fTitle="FLUKA Boundary Source";
	53	// Read in all particle types by default
	54	fIkine=6;
	55	// Set maximum admitted age of particles to 1.e-05 by default
	56	fAgeMax=1.e-05;
	57	// Do not add weight
	58	fAddWeight=1.;
	59	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	60	// from specific boundary source to the chamber (fZshift=4.5;),else there
	61	// is no need to shift as it reads boundary source for the whole volume of
	62	// the Muon Arm; the default value corresponds to boundary source for the
	63	// whole volume of the MUON Arm
	64	fZshift=0;
	65	// Set the default file
	66	fFileName="flukasource.root";
	67
	68	fTreeFluka=0;
886b6f73	69	fTreeChain = new TChain("h1");
fe4da5cc	70	//
	71	// Read all particles
	72	fNpart=-1;
f87cfe57	73
fe4da5cc	74
	75	}
	76
	77	AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
	78	:AliGenerator(npart)
	79	{
f87cfe57	80	// Constructor
fe4da5cc	81	fName="FLUKA";
	82	fTitle="FLUKA Boundary Source";
	83	// Read in all particle types by default
	84	fIkine=6;
	85	// Set maximum admitted age of particles to 1.e-05 by default
	86	fAgeMax=1.e-05;
	87	// Do not add weight
	88	fAddWeight=1.;
	89	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	90	// from specific boundary source to the chamber (fZshift=4.5;),else there
	91	// is no need to shift as it reads boundary source for the whole volume of
	92	// the Muon Arm; the default value corresponds to boundary source for the
	93	// whole volume of the MUON Arm
	94	fZshift=0;
	95	// Set the default file
	96	fFileName="flukasource.root";
	97
	98	fTreeFluka=0;
886b6f73	99	fTreeChain = new TChain("h1");
f87cfe57	100	fSourceId=-1;
fe4da5cc	101	}
fe4da5cc	102
f87cfe57	103	AliGenFLUKAsource::AliGenFLUKAsource(const AliGenFLUKAsource & FLUKAsource)
	104	{
	105	// copy constructor
	106	}
	107
	108
fe4da5cc	109	//____________________________________________________________
	110	AliGenFLUKAsource::~AliGenFLUKAsource()
	111	{
f87cfe57	112	// Destructor
886b6f73	113	if (fTreeFluka) delete fTreeFluka;
886b6f73	114	if (fTreeChain) delete fTreeChain;
fe4da5cc	115	}
fe4da5cc	116
886b6f73	117	void AliGenFLUKAsource::AddFile(const Text_t *filename)
fe4da5cc	118	{
f87cfe57	119	// Add a file to the chain
886b6f73	120	fTreeChain->Add(filename);
fe4da5cc	121
886b6f73	122	}
886b6f73	123
fe4da5cc	124
886b6f73	125	//____________________________________________________________
	126	void AliGenFLUKAsource::FlukaInit()
	127	{
f87cfe57	128	// Set branch addresses of data entries
886b6f73	129	TChain *h2=fTreeChain;
fe4da5cc	130	//Set branch addresses
f87cfe57	131	h2->SetBranchAddress("Ip",&fIp);
	132	h2->SetBranchAddress("Ipp",&fIpp);
	133	h2->SetBranchAddress("Xi",&fXi);
	134	h2->SetBranchAddress("Yi",&fYi);
	135	h2->SetBranchAddress("Zi",&fZi);
	136	h2->SetBranchAddress("Px",&fPx);
	137	h2->SetBranchAddress("Py",&fPy);
	138	h2->SetBranchAddress("Pz",&fPz);
	139	h2->SetBranchAddress("Ekin",&fEkin);
	140	h2->SetBranchAddress("Zv",&fZv);
	141	h2->SetBranchAddress("Rv",&fRv);
	142	h2->SetBranchAddress("Itra",&fItra);
	143	h2->SetBranchAddress("Igas",&fIgas);
	144	h2->SetBranchAddress("Wgt",&fWgt);
	145	h2->SetBranchAddress("Etag",&fEtag);
	146	h2->SetBranchAddress("Ptg",&fPtg);
	147	h2->SetBranchAddress("Age",&fAge);
fe4da5cc	148	}
	149
	150	//____________________________________________________________
	151	void AliGenFLUKAsource::Generate()
f87cfe57	152	{
f87cfe57	153	// Generate one event
886b6f73	154	AliMC* gMC = AliMC::GetMC();
fe4da5cc	155
f87cfe57	156	const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
1578254f	157	kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
	158	kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
	159	kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
	160	kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
	161	0,kNuMu,kNuMuBar};
886b6f73	162	Float_t polar[3]= {0,0,0};
fe4da5cc	163	//
886b6f73	164	Float_t origin[3];
	165	Float_t p[3];
	166	Float_t prwn;
	167	Float_t wgt, fwgt;
	168	Float_t phi;
	169	char name[100];
	170	Float_t amass, charge, tlife;
	171	Int_t itrtyp;
	172	Int_t iwgt;
	173	Int_t i, j, part, nt;
e7bafa6d	174	static Int_t irwn=0;
886b6f73	175	//
886b6f73	176	Float_t random[2];
fe4da5cc	177	//
886b6f73	178	FlukaInit();
	179	TChain *h2=fTreeChain;
	180	Int_t nentries = (Int_t) h2->GetEntries();
	181	if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
fe4da5cc	182
fe4da5cc	183	// loop over number of particles
886b6f73	184	Int_t nb=0;
cfce8870	185	Int_t ev=gMC->CurrentEvent();
886b6f73	186	for (i=0; i<fNpart;i++) {
	187	Int_t entry=fNpart*(ev-1)+i;
	188	nb = (Int_t)h2->GetEvent(entry);
	189	if (irwn > nentries) {
	190	printf("No more entries in the FLUKA boundary source file\n");
f87cfe57	191	TFile *pFile=0;
886b6f73	192	// Get AliRun object or create it
886b6f73	193	if (!gAlice) {
f87cfe57	194	gAlice = (AliRun*)pFile->Get("gAlice");
886b6f73	195	if (gAlice) printf("AliRun object found on file\n");
	196	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	197	}
	198	TTree *fAli=gAlice->TreeK();
f87cfe57	199	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	200	pFile->cd();
886b6f73	201	printf("Generate - I'm out \n");
	202	return;
	203	}
f87cfe57	204
	205	if (fSourceId != -1 && fIgas !=fSourceId) {
	206	irwn++;
	207	continue;
	208	}
	209
	210	if (fIp > 28 \|\| fIp < 0) {
886b6f73	211	irwn++;
	212	continue;
	213	}
	214
f87cfe57	215	if ((fIp != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) \|\| fAge > fAgeMax){
886b6f73	216	irwn++;
	217	continue;
	218	} else if (fIkine == 9) {
f87cfe57	219	if (fIp == 7 \|\| fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	220	irwn++;
	221	continue;
	222	}
	223	} else if (fIkine == 10) {
f87cfe57	224	if (fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	225	irwn++;
	226	continue;
	227	}
	228	}
fe4da5cc	229
fe4da5cc	230
886b6f73	231	irwn++;
02769dba	232	//
f87cfe57	233	// PDG code from FLUKA particle type (fIp)
f87cfe57	234	part=kIfluge[int(fIp)-1];
02769dba	235	//
	236	// Calculate momentum from kinetic energy and mass of the particle
	237	gMC->Gfpart(part, name, itrtyp,
	238	amass, charge, tlife);
f87cfe57	239	prwn=fEkinsqrt(1. + 2.amass/fEkin);
02769dba	240
02769dba	241
f87cfe57	242	origin[0]=fYi;
	243	origin[1]=fXi;
	244	origin[2]=fZi;
886b6f73	245
f87cfe57	246	p[0]=fPy*prwn;
	247	p[1]=fPx*prwn;
	248	p[2]=fPz*prwn;
fe4da5cc	249
886b6f73	250	//handle particle weight correctly
f87cfe57	251	wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
886b6f73	252	iwgt=Int_t(wgt);
886b6f73	253	fwgt=wgt-Float_t(iwgt);
cfce8870	254	gMC->Rndm(random,2);
886b6f73	255	if (random[0] < fwgt) iwgt++;
	256	if (part==1 && iwgt>100) iwgt=100;
	257	Int_t nstack=0;
	258	for (j=0; j<iwgt; j++) {
f87cfe57	259	gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,"Primary",nt);
886b6f73	260	gMC->Rndm(random,2);
	261	phi=2random[1]TMath::Pi();
	262	Float_t pn1=p[0]TMath::Sin(phi) - p[1]TMath::Cos(phi);
	263	Float_t pn2=p[0]TMath::Cos(phi) + p[1]TMath::Sin(phi);
	264	p[0]=pn1;
	265	p[1]=pn2;
	266	Float_t on1=origin[0]TMath::Sin(phi)-origin[1]TMath::Cos(phi);
	267	Float_t on2=origin[0]TMath::Cos(phi)+origin[1]TMath::Sin(phi);
	268	origin[0]=on1;
	269	origin[1]=on2;
	270	nstack++;
	271	}
	272	if (nstack == 0) continue;
fe4da5cc	273	}
886b6f73	274
f87cfe57	275	TFile *pFile=0;
fe4da5cc	276	// Get AliRun object or create it
fe4da5cc	277	if (!gAlice) {
f87cfe57	278	gAlice = (AliRun*)pFile->Get("gAlice");
fe4da5cc	279	if (gAlice) printf("AliRun object found on file\n");
	280	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	281	}
	282	TTree *fAli=gAlice->TreeK();
f87cfe57	283	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	284	pFile->cd();
fe4da5cc	285	}
	286
	287
f87cfe57	288	AliGenFLUKAsource& AliGenFLUKAsource::operator=(const AliGenFLUKAsource& rhs)
	289	{
	290	// Assignment operator
	291	return *this;
	292	}
fe4da5cc	293
	294
	295
	296
	297
	298