[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 1.9  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 "AliGenMUONlib.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliPDG.h"
#include <TDirectory.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	$Log$
f87cfe57	18	Revision 1.9 2000/03/07 13:52:54 morsch
	19	static Int_t irwn=0;
	20
e7bafa6d	21	Revision 1.8 2000/02/14 14:49:38 morsch
	22	Correct particle type for gamma and neutrons
	23	More consistent calculation of momentum from kin. energy and mass
	24
02769dba	25	Revision 1.7 1999/11/03 17:43:20 fca
	26	New version from G.Martinez & A.Morsch
	27
886b6f73	28	Revision 1.6 1999/09/29 09:24:12 fca
	29	Introduction of the Copyright and cvs Log
	30
4c039060	31	*/
4c039060	32
fe4da5cc	33	#include "AliGenFLUKAsource.h"
	34	#include "AliGenMUONlib.h"
	35	#include "AliMC.h"
	36	#include "AliRun.h"
c5970876	37	#include "AliPDG.h"
fe4da5cc	38	#include <TDirectory.h>
	39	#include <TFile.h>
	40	#include <TTree.h>
f87cfe57	41	#include <TChain.h>
fe4da5cc	42	#include <stdlib.h>
	43	ClassImp(AliGenFLUKAsource)
	44	AliGenFLUKAsource::AliGenFLUKAsource()
	45	:AliGenerator(-1)
	46	{
f87cfe57	47	// Constructor
fe4da5cc	48	fName="FLUKA";
	49	fTitle="FLUKA Boundary Source";
	50	// Read in all particle types by default
	51	fIkine=6;
	52	// Set maximum admitted age of particles to 1.e-05 by default
	53	fAgeMax=1.e-05;
	54	// Do not add weight
	55	fAddWeight=1.;
	56	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	57	// from specific boundary source to the chamber (fZshift=4.5;),else there
	58	// is no need to shift as it reads boundary source for the whole volume of
	59	// the Muon Arm; the default value corresponds to boundary source for the
	60	// whole volume of the MUON Arm
	61	fZshift=0;
	62	// Set the default file
	63	fFileName="flukasource.root";
	64
	65	fTreeFluka=0;
886b6f73	66	fTreeChain = new TChain("h1");
fe4da5cc	67	//
	68	// Read all particles
	69	fNpart=-1;
f87cfe57	70
fe4da5cc	71
	72	}
	73
	74	AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
	75	:AliGenerator(npart)
	76	{
f87cfe57	77	// Constructor
fe4da5cc	78	fName="FLUKA";
	79	fTitle="FLUKA Boundary Source";
	80	// Read in all particle types by default
	81	fIkine=6;
	82	// Set maximum admitted age of particles to 1.e-05 by default
	83	fAgeMax=1.e-05;
	84	// Do not add weight
	85	fAddWeight=1.;
	86	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	87	// from specific boundary source to the chamber (fZshift=4.5;),else there
	88	// is no need to shift as it reads boundary source for the whole volume of
	89	// the Muon Arm; the default value corresponds to boundary source for the
	90	// whole volume of the MUON Arm
	91	fZshift=0;
	92	// Set the default file
	93	fFileName="flukasource.root";
	94
	95	fTreeFluka=0;
886b6f73	96	fTreeChain = new TChain("h1");
f87cfe57	97	fSourceId=-1;
fe4da5cc	98	}
fe4da5cc	99
f87cfe57	100	AliGenFLUKAsource::AliGenFLUKAsource(const AliGenFLUKAsource & FLUKAsource)
	101	{
	102	// copy constructor
	103	}
	104
	105
fe4da5cc	106	//____________________________________________________________
	107	AliGenFLUKAsource::~AliGenFLUKAsource()
	108	{
f87cfe57	109	// Destructor
886b6f73	110	if (fTreeFluka) delete fTreeFluka;
886b6f73	111	if (fTreeChain) delete fTreeChain;
fe4da5cc	112	}
fe4da5cc	113
886b6f73	114	void AliGenFLUKAsource::AddFile(const Text_t *filename)
fe4da5cc	115	{
f87cfe57	116	// Add a file to the chain
886b6f73	117	fTreeChain->Add(filename);
fe4da5cc	118
886b6f73	119	}
886b6f73	120
fe4da5cc	121
886b6f73	122	//____________________________________________________________
	123	void AliGenFLUKAsource::FlukaInit()
	124	{
f87cfe57	125	// Set branch addresses of data entries
886b6f73	126	TChain *h2=fTreeChain;
fe4da5cc	127	//Set branch addresses
f87cfe57	128	h2->SetBranchAddress("Ip",&fIp);
	129	h2->SetBranchAddress("Ipp",&fIpp);
	130	h2->SetBranchAddress("Xi",&fXi);
	131	h2->SetBranchAddress("Yi",&fYi);
	132	h2->SetBranchAddress("Zi",&fZi);
	133	h2->SetBranchAddress("Px",&fPx);
	134	h2->SetBranchAddress("Py",&fPy);
	135	h2->SetBranchAddress("Pz",&fPz);
	136	h2->SetBranchAddress("Ekin",&fEkin);
	137	h2->SetBranchAddress("Zv",&fZv);
	138	h2->SetBranchAddress("Rv",&fRv);
	139	h2->SetBranchAddress("Itra",&fItra);
	140	h2->SetBranchAddress("Igas",&fIgas);
	141	h2->SetBranchAddress("Wgt",&fWgt);
	142	h2->SetBranchAddress("Etag",&fEtag);
	143	h2->SetBranchAddress("Ptg",&fPtg);
	144	h2->SetBranchAddress("Age",&fAge);
fe4da5cc	145	}
	146
	147	//____________________________________________________________
	148	void AliGenFLUKAsource::Generate()
f87cfe57	149	{
f87cfe57	150	// Generate one event
886b6f73	151	AliMC* gMC = AliMC::GetMC();
fe4da5cc	152
f87cfe57	153	const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
1578254f	154	kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
	155	kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
	156	kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
	157	kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
	158	0,kNuMu,kNuMuBar};
886b6f73	159	Float_t polar[3]= {0,0,0};
fe4da5cc	160	//
886b6f73	161	Float_t origin[3];
	162	Float_t p[3];
	163	Float_t prwn;
	164	Float_t wgt, fwgt;
	165	Float_t phi;
	166	char name[100];
	167	Float_t amass, charge, tlife;
	168	Int_t itrtyp;
	169	Int_t iwgt;
	170	Int_t i, j, part, nt;
e7bafa6d	171	static Int_t irwn=0;
886b6f73	172	//
886b6f73	173	Float_t random[2];
fe4da5cc	174	//
886b6f73	175	FlukaInit();
	176	TChain *h2=fTreeChain;
	177	Int_t nentries = (Int_t) h2->GetEntries();
	178	if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
fe4da5cc	179
fe4da5cc	180	// loop over number of particles
886b6f73	181	Int_t nb=0;
cfce8870	182	Int_t ev=gMC->CurrentEvent();
886b6f73	183	for (i=0; i<fNpart;i++) {
	184	Int_t entry=fNpart*(ev-1)+i;
	185	nb = (Int_t)h2->GetEvent(entry);
	186	if (irwn > nentries) {
	187	printf("No more entries in the FLUKA boundary source file\n");
f87cfe57	188	TFile *pFile=0;
886b6f73	189	// Get AliRun object or create it
886b6f73	190	if (!gAlice) {
f87cfe57	191	gAlice = (AliRun*)pFile->Get("gAlice");
886b6f73	192	if (gAlice) printf("AliRun object found on file\n");
	193	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	194	}
	195	TTree *fAli=gAlice->TreeK();
f87cfe57	196	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	197	pFile->cd();
886b6f73	198	printf("Generate - I'm out \n");
	199	return;
	200	}
f87cfe57	201
	202	if (fSourceId != -1 && fIgas !=fSourceId) {
	203	irwn++;
	204	continue;
	205	}
	206
	207	if (fIp > 28 \|\| fIp < 0) {
886b6f73	208	irwn++;
	209	continue;
	210	}
	211
f87cfe57	212	if ((fIp != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) \|\| fAge > fAgeMax){
886b6f73	213	irwn++;
	214	continue;
	215	} else if (fIkine == 9) {
f87cfe57	216	if (fIp == 7 \|\| fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	217	irwn++;
	218	continue;
	219	}
	220	} else if (fIkine == 10) {
f87cfe57	221	if (fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	222	irwn++;
	223	continue;
	224	}
	225	}
fe4da5cc	226
fe4da5cc	227
886b6f73	228	irwn++;
02769dba	229	//
f87cfe57	230	// PDG code from FLUKA particle type (fIp)
f87cfe57	231	part=kIfluge[int(fIp)-1];
02769dba	232	//
	233	// Calculate momentum from kinetic energy and mass of the particle
	234	gMC->Gfpart(part, name, itrtyp,
	235	amass, charge, tlife);
f87cfe57	236	prwn=fEkinsqrt(1. + 2.amass/fEkin);
02769dba	237
02769dba	238
f87cfe57	239	origin[0]=fYi;
	240	origin[1]=fXi;
	241	origin[2]=fZi;
886b6f73	242
f87cfe57	243	p[0]=fPy*prwn;
	244	p[1]=fPx*prwn;
	245	p[2]=fPz*prwn;
fe4da5cc	246
886b6f73	247	//handle particle weight correctly
f87cfe57	248	wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
886b6f73	249	iwgt=Int_t(wgt);
886b6f73	250	fwgt=wgt-Float_t(iwgt);
cfce8870	251	gMC->Rndm(random,2);
886b6f73	252	if (random[0] < fwgt) iwgt++;
	253	if (part==1 && iwgt>100) iwgt=100;
	254	Int_t nstack=0;
	255	for (j=0; j<iwgt; j++) {
f87cfe57	256	gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,"Primary",nt);
886b6f73	257	gMC->Rndm(random,2);
	258	phi=2random[1]TMath::Pi();
	259	Float_t pn1=p[0]TMath::Sin(phi) - p[1]TMath::Cos(phi);
	260	Float_t pn2=p[0]TMath::Cos(phi) + p[1]TMath::Sin(phi);
	261	p[0]=pn1;
	262	p[1]=pn2;
	263	Float_t on1=origin[0]TMath::Sin(phi)-origin[1]TMath::Cos(phi);
	264	Float_t on2=origin[0]TMath::Cos(phi)+origin[1]TMath::Sin(phi);
	265	origin[0]=on1;
	266	origin[1]=on2;
	267	nstack++;
	268	}
	269	if (nstack == 0) continue;
fe4da5cc	270	}
886b6f73	271
f87cfe57	272	TFile *pFile=0;
fe4da5cc	273	// Get AliRun object or create it
fe4da5cc	274	if (!gAlice) {
f87cfe57	275	gAlice = (AliRun*)pFile->Get("gAlice");
fe4da5cc	276	if (gAlice) printf("AliRun object found on file\n");
	277	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	278	}
	279	TTree *fAli=gAlice->TreeK();
f87cfe57	280	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	281	pFile->cd();
fe4da5cc	282	}
	283
	284
f87cfe57	285	AliGenFLUKAsource& AliGenFLUKAsource::operator=(const AliGenFLUKAsource& rhs)
	286	{
	287	// Assignment operator
	288	return *this;
	289	}
fe4da5cc	290
	291
	292
	293
	294
	295