[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 1.7  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 <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;
    fTreeChain = new TChain("h1");
//
//  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;
    fTreeChain = new TChain("h1"); 
}

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

void AliGenFLUKAsource::AddFile(const Text_t *filename)
{
    fTreeChain->Add(filename);
    
}


//____________________________________________________________
void AliGenFLUKAsource::FlukaInit() 
{
    TChain *h2=fTreeChain;
//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* gMC = AliMC::GetMC();

    const Int_t ifluge[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;
    //
    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 *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();
	    printf("Generate - I'm out \n");
	    return;
	}   
	if (Ip > 28 || Ip < 0) {
	    irwn++;
	    continue;
	}
	
	if ((Ip != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) || Age > fAgeMax){
	    irwn++;
	    continue;
	} else if (fIkine == 9) {
	    if (Ip == 7 || Ip == 8 || Age > fAgeMax) { 
		irwn++;
		continue;
	    }
	} else if (fIkine == 10) {
	    if (Ip == 8 || Age > fAgeMax) { 
		irwn++;
		continue;
	    }
	}
    

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


	origin[0]=Yi;
	origin[1]=Xi;
	origin[2]=Zi;
	
	p[0]=Py*prwn;
	p[1]=Px*prwn;
	p[2]=Pz*prwn;

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