[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 1.11  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

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);
	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,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);
	    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	$Log$
65fb704d	18	Revision 1.11 2000/06/14 15:20:40 morsch
	19	Include clean-up (IH)
	20
5c3fd7ea	21	Revision 1.10 2000/06/09 20:31:34 morsch
	22	All coding rule violations except RS3 corrected
	23
f87cfe57	24	Revision 1.9 2000/03/07 13:52:54 morsch
	25	static Int_t irwn=0;
	26
e7bafa6d	27	Revision 1.8 2000/02/14 14:49:38 morsch
	28	Correct particle type for gamma and neutrons
	29	More consistent calculation of momentum from kin. energy and mass
	30
02769dba	31	Revision 1.7 1999/11/03 17:43:20 fca
	32	New version from G.Martinez & A.Morsch
	33
886b6f73	34	Revision 1.6 1999/09/29 09:24:12 fca
	35	Introduction of the Copyright and cvs Log
	36
4c039060	37	*/
4c039060	38
fe4da5cc	39	#include "AliGenFLUKAsource.h"
fe4da5cc	40	#include "AliMC.h"
fe4da5cc	41	#include "AliRun.h"
c5970876	42	#include "AliPDG.h"
5c3fd7ea	43
5c3fd7ea	44
fe4da5cc	45	#include <TFile.h>
fe4da5cc	46	#include <TTree.h>
f87cfe57	47	#include <TChain.h>
fe4da5cc	48	#include <stdlib.h>
	49	ClassImp(AliGenFLUKAsource)
	50	AliGenFLUKAsource::AliGenFLUKAsource()
	51	:AliGenerator(-1)
	52	{
f87cfe57	53	// Constructor
fe4da5cc	54	fName="FLUKA";
	55	fTitle="FLUKA Boundary Source";
	56	// Read in all particle types by default
	57	fIkine=6;
	58	// Set maximum admitted age of particles to 1.e-05 by default
	59	fAgeMax=1.e-05;
	60	// Do not add weight
	61	fAddWeight=1.;
	62	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	63	// from specific boundary source to the chamber (fZshift=4.5;),else there
	64	// is no need to shift as it reads boundary source for the whole volume of
	65	// the Muon Arm; the default value corresponds to boundary source for the
	66	// whole volume of the MUON Arm
	67	fZshift=0;
	68	// Set the default file
	69	fFileName="flukasource.root";
	70
	71	fTreeFluka=0;
886b6f73	72	fTreeChain = new TChain("h1");
fe4da5cc	73	//
	74	// Read all particles
	75	fNpart=-1;
f87cfe57	76
fe4da5cc	77
	78	}
	79
	80	AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
	81	:AliGenerator(npart)
	82	{
f87cfe57	83	// Constructor
fe4da5cc	84	fName="FLUKA";
	85	fTitle="FLUKA Boundary Source";
	86	// Read in all particle types by default
	87	fIkine=6;
	88	// Set maximum admitted age of particles to 1.e-05 by default
	89	fAgeMax=1.e-05;
	90	// Do not add weight
	91	fAddWeight=1.;
	92	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	93	// from specific boundary source to the chamber (fZshift=4.5;),else there
	94	// is no need to shift as it reads boundary source for the whole volume of
	95	// the Muon Arm; the default value corresponds to boundary source for the
	96	// whole volume of the MUON Arm
	97	fZshift=0;
	98	// Set the default file
	99	fFileName="flukasource.root";
	100
	101	fTreeFluka=0;
886b6f73	102	fTreeChain = new TChain("h1");
f87cfe57	103	fSourceId=-1;
fe4da5cc	104	}
fe4da5cc	105
f87cfe57	106	AliGenFLUKAsource::AliGenFLUKAsource(const AliGenFLUKAsource & FLUKAsource)
	107	{
	108	// copy constructor
	109	}
	110
	111
fe4da5cc	112	//____________________________________________________________
	113	AliGenFLUKAsource::~AliGenFLUKAsource()
	114	{
f87cfe57	115	// Destructor
886b6f73	116	if (fTreeFluka) delete fTreeFluka;
886b6f73	117	if (fTreeChain) delete fTreeChain;
fe4da5cc	118	}
fe4da5cc	119
886b6f73	120	void AliGenFLUKAsource::AddFile(const Text_t *filename)
fe4da5cc	121	{
f87cfe57	122	// Add a file to the chain
886b6f73	123	fTreeChain->Add(filename);
fe4da5cc	124
886b6f73	125	}
886b6f73	126
fe4da5cc	127
886b6f73	128	//____________________________________________________________
	129	void AliGenFLUKAsource::FlukaInit()
	130	{
f87cfe57	131	// Set branch addresses of data entries
886b6f73	132	TChain *h2=fTreeChain;
fe4da5cc	133	//Set branch addresses
f87cfe57	134	h2->SetBranchAddress("Ip",&fIp);
	135	h2->SetBranchAddress("Ipp",&fIpp);
	136	h2->SetBranchAddress("Xi",&fXi);
	137	h2->SetBranchAddress("Yi",&fYi);
	138	h2->SetBranchAddress("Zi",&fZi);
	139	h2->SetBranchAddress("Px",&fPx);
	140	h2->SetBranchAddress("Py",&fPy);
	141	h2->SetBranchAddress("Pz",&fPz);
	142	h2->SetBranchAddress("Ekin",&fEkin);
	143	h2->SetBranchAddress("Zv",&fZv);
	144	h2->SetBranchAddress("Rv",&fRv);
	145	h2->SetBranchAddress("Itra",&fItra);
	146	h2->SetBranchAddress("Igas",&fIgas);
	147	h2->SetBranchAddress("Wgt",&fWgt);
	148	h2->SetBranchAddress("Etag",&fEtag);
	149	h2->SetBranchAddress("Ptg",&fPtg);
	150	h2->SetBranchAddress("Age",&fAge);
fe4da5cc	151	}
	152
	153	//____________________________________________________________
	154	void AliGenFLUKAsource::Generate()
f87cfe57	155	{
f87cfe57	156	// Generate one event
886b6f73	157	AliMC* gMC = AliMC::GetMC();
fe4da5cc	158
f87cfe57	159	const Int_t kIfluge[28]={kProton, kProtonBar, kElectron, kPositron,
1578254f	160	kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
	161	kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
	162	kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
	163	kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
	164	0,kNuMu,kNuMuBar};
886b6f73	165	Float_t polar[3]= {0,0,0};
fe4da5cc	166	//
886b6f73	167	Float_t origin[3];
	168	Float_t p[3];
	169	Float_t prwn;
	170	Float_t wgt, fwgt;
	171	Float_t phi;
	172	char name[100];
	173	Float_t amass, charge, tlife;
	174	Int_t itrtyp;
	175	Int_t iwgt;
	176	Int_t i, j, part, nt;
e7bafa6d	177	static Int_t irwn=0;
886b6f73	178	//
886b6f73	179	Float_t random[2];
fe4da5cc	180	//
886b6f73	181	FlukaInit();
	182	TChain *h2=fTreeChain;
	183	Int_t nentries = (Int_t) h2->GetEntries();
	184	if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
fe4da5cc	185
fe4da5cc	186	// loop over number of particles
886b6f73	187	Int_t nb=0;
cfce8870	188	Int_t ev=gMC->CurrentEvent();
886b6f73	189	for (i=0; i<fNpart;i++) {
	190	Int_t entry=fNpart*(ev-1)+i;
	191	nb = (Int_t)h2->GetEvent(entry);
	192	if (irwn > nentries) {
	193	printf("No more entries in the FLUKA boundary source file\n");
f87cfe57	194	TFile *pFile=0;
886b6f73	195	// Get AliRun object or create it
886b6f73	196	if (!gAlice) {
f87cfe57	197	gAlice = (AliRun*)pFile->Get("gAlice");
886b6f73	198	if (gAlice) printf("AliRun object found on file\n");
	199	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	200	}
	201	TTree *fAli=gAlice->TreeK();
f87cfe57	202	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	203	pFile->cd();
886b6f73	204	printf("Generate - I'm out \n");
	205	return;
	206	}
f87cfe57	207
	208	if (fSourceId != -1 && fIgas !=fSourceId) {
	209	irwn++;
	210	continue;
	211	}
	212
	213	if (fIp > 28 \|\| fIp < 0) {
886b6f73	214	irwn++;
	215	continue;
	216	}
	217
f87cfe57	218	if ((fIp != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) \|\| fAge > fAgeMax){
886b6f73	219	irwn++;
	220	continue;
	221	} else if (fIkine == 9) {
f87cfe57	222	if (fIp == 7 \|\| fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	223	irwn++;
	224	continue;
	225	}
	226	} else if (fIkine == 10) {
f87cfe57	227	if (fIp == 8 \|\| fAge > fAgeMax) {
886b6f73	228	irwn++;
	229	continue;
	230	}
	231	}
fe4da5cc	232
fe4da5cc	233
886b6f73	234	irwn++;
02769dba	235	//
f87cfe57	236	// PDG code from FLUKA particle type (fIp)
f87cfe57	237	part=kIfluge[int(fIp)-1];
02769dba	238	//
	239	// Calculate momentum from kinetic energy and mass of the particle
	240	gMC->Gfpart(part, name, itrtyp,
	241	amass, charge, tlife);
f87cfe57	242	prwn=fEkinsqrt(1. + 2.amass/fEkin);
02769dba	243
02769dba	244
f87cfe57	245	origin[0]=fYi;
	246	origin[1]=fXi;
	247	origin[2]=fZi;
886b6f73	248
f87cfe57	249	p[0]=fPy*prwn;
	250	p[1]=fPx*prwn;
	251	p[2]=fPz*prwn;
fe4da5cc	252
886b6f73	253	//handle particle weight correctly
f87cfe57	254	wgt = (part == 13) ? fWgt*fAddWeight : fWgt;
886b6f73	255	iwgt=Int_t(wgt);
886b6f73	256	fwgt=wgt-Float_t(iwgt);
65fb704d	257	Rndm(random,2);
886b6f73	258	if (random[0] < fwgt) iwgt++;
	259	if (part==1 && iwgt>100) iwgt=100;
	260	Int_t nstack=0;
	261	for (j=0; j<iwgt; j++) {
65fb704d	262	gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,fAge,kPPrimary,nt);
65fb704d	263	Rndm(random,2);
886b6f73	264	phi=2random[1]TMath::Pi();
	265	Float_t pn1=p[0]TMath::Sin(phi) - p[1]TMath::Cos(phi);
	266	Float_t pn2=p[0]TMath::Cos(phi) + p[1]TMath::Sin(phi);
	267	p[0]=pn1;
	268	p[1]=pn2;
	269	Float_t on1=origin[0]TMath::Sin(phi)-origin[1]TMath::Cos(phi);
	270	Float_t on2=origin[0]TMath::Cos(phi)+origin[1]TMath::Sin(phi);
	271	origin[0]=on1;
	272	origin[1]=on2;
	273	nstack++;
	274	}
	275	if (nstack == 0) continue;
fe4da5cc	276	}
886b6f73	277
f87cfe57	278	TFile *pFile=0;
fe4da5cc	279	// Get AliRun object or create it
fe4da5cc	280	if (!gAlice) {
f87cfe57	281	gAlice = (AliRun*)pFile->Get("gAlice");
fe4da5cc	282	if (gAlice) printf("AliRun object found on file\n");
	283	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	284	}
	285	TTree *fAli=gAlice->TreeK();
f87cfe57	286	if (fAli) pFile =fAli->GetCurrentFile();
f87cfe57	287	pFile->cd();
fe4da5cc	288	}
	289
	290
f87cfe57	291	AliGenFLUKAsource& AliGenFLUKAsource::operator=(const AliGenFLUKAsource& rhs)
	292	{
	293	// Assignment operator
	294	return *this;
	295	}
fe4da5cc	296
	297
	298
	299
	300
	301