[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 1.6  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++;
	printf("\n Particle type: %f \n \n ", Ip);
	
	if (Ip ==7){
	    prwn=Ekin;
	    part=1;
	} else if (Ip == 8) {
	    prwn=Ekin*sqrt(1. + 2.*0.93956563/Ekin);
	    part=13;
	} else {
	    part=ifluge[int(Ip)-1];
	    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	$Log$
886b6f73	18	Revision 1.6 1999/09/29 09:24:12 fca
	19	Introduction of the Copyright and cvs Log
	20
4c039060	21	*/
4c039060	22
fe4da5cc	23	#include "AliGenFLUKAsource.h"
	24	#include "AliGenMUONlib.h"
	25	#include "AliMC.h"
	26	#include "AliRun.h"
c5970876	27	#include "AliPDG.h"
fe4da5cc	28	#include <TDirectory.h>
	29	#include <TFile.h>
	30	#include <TTree.h>
	31	#include <stdlib.h>
	32	ClassImp(AliGenFLUKAsource)
	33	AliGenFLUKAsource::AliGenFLUKAsource()
	34	:AliGenerator(-1)
	35	{
	36	//
	37	fName="FLUKA";
	38	fTitle="FLUKA Boundary Source";
	39	// Read in all particle types by default
	40	fIkine=6;
	41	// Set maximum admitted age of particles to 1.e-05 by default
	42	fAgeMax=1.e-05;
	43	// Do not add weight
	44	fAddWeight=1.;
	45	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	46	// from specific boundary source to the chamber (fZshift=4.5;),else there
	47	// is no need to shift as it reads boundary source for the whole volume of
	48	// the Muon Arm; the default value corresponds to boundary source for the
	49	// whole volume of the MUON Arm
	50	fZshift=0;
	51	// Set the default file
	52	fFileName="flukasource.root";
	53
	54	fTreeFluka=0;
886b6f73	55	fTreeChain = new TChain("h1");
fe4da5cc	56	//
	57	// Read all particles
	58	fNpart=-1;
	59
	60	}
	61
	62	AliGenFLUKAsource::AliGenFLUKAsource(Int_t npart)
	63	:AliGenerator(npart)
	64	{
	65	//
	66	fName="FLUKA";
	67	fTitle="FLUKA Boundary Source";
	68	// Read in all particle types by default
	69	fIkine=6;
	70	// Set maximum admitted age of particles to 1.e-05 by default
	71	fAgeMax=1.e-05;
	72	// Do not add weight
	73	fAddWeight=1.;
	74	// Shift the z-coordinate of the impact point by 4.5 cm only if it reads
	75	// from specific boundary source to the chamber (fZshift=4.5;),else there
	76	// is no need to shift as it reads boundary source for the whole volume of
	77	// the Muon Arm; the default value corresponds to boundary source for the
	78	// whole volume of the MUON Arm
	79	fZshift=0;
	80	// Set the default file
	81	fFileName="flukasource.root";
	82
	83	fTreeFluka=0;
886b6f73	84	fTreeChain = new TChain("h1");
fe4da5cc	85	}
	86
	87	//____________________________________________________________
	88	AliGenFLUKAsource::~AliGenFLUKAsource()
	89	{
886b6f73	90	if (fTreeFluka) delete fTreeFluka;
	91	if (fTreeChain) delete fTreeChain;
	92	// if (fFileName) delete fFileName;
fe4da5cc	93	}
fe4da5cc	94
886b6f73	95	void AliGenFLUKAsource::AddFile(const Text_t *filename)
fe4da5cc	96	{
886b6f73	97	fTreeChain->Add(filename);
fe4da5cc	98
886b6f73	99	}
886b6f73	100
fe4da5cc	101
886b6f73	102	//____________________________________________________________
	103	void AliGenFLUKAsource::FlukaInit()
	104	{
	105	TChain *h2=fTreeChain;
fe4da5cc	106	//Set branch addresses
	107	h2->SetBranchAddress("Ip",&Ip);
	108	h2->SetBranchAddress("Ipp",&Ipp);
	109	h2->SetBranchAddress("Xi",&Xi);
	110	h2->SetBranchAddress("Yi",&Yi);
	111	h2->SetBranchAddress("Zi",&Zi);
	112	h2->SetBranchAddress("Px",&Px);
	113	h2->SetBranchAddress("Py",&Py);
	114	h2->SetBranchAddress("Pz",&Pz);
	115	h2->SetBranchAddress("Ekin",&Ekin);
	116	h2->SetBranchAddress("Zv",&Zv);
	117	h2->SetBranchAddress("Rv",&Rv);
	118	h2->SetBranchAddress("Itra",&Itra);
	119	h2->SetBranchAddress("Igas",&Igas);
	120	h2->SetBranchAddress("Wgt",&Wgt);
	121	h2->SetBranchAddress("Etag",&Etag);
	122	h2->SetBranchAddress("Ptg",&Ptg);
	123	h2->SetBranchAddress("Age",&Age);
	124	}
	125
	126	//____________________________________________________________
	127	void AliGenFLUKAsource::Generate()
886b6f73	128	{
886b6f73	129	AliMC* gMC = AliMC::GetMC();
fe4da5cc	130
886b6f73	131	const Int_t ifluge[28]={kProton, kProtonBar, kElectron, kPositron,
1578254f	132	kNuE, kNuEBar, kGamma, kNeutron, kNeutronBar,
	133	kMuonPlus, kMuonMinus, kK0Long , kPiPlus, kPiMinus,
	134	kKPlus, kKMinus, kLambda0, kLambda0Bar, kK0Short,
	135	kSigmaMinus, kSigmaPlus, kSigma0, kPi0, kK0, kK0Bar,
	136	0,kNuMu,kNuMuBar};
886b6f73	137	Float_t polar[3]= {0,0,0};
fe4da5cc	138	//
886b6f73	139	Float_t origin[3];
	140	Float_t p[3];
	141	Float_t prwn;
	142	Float_t wgt, fwgt;
	143	Float_t phi;
	144	char name[100];
	145	Float_t amass, charge, tlife;
	146	Int_t itrtyp;
	147	Int_t iwgt;
	148	Int_t i, j, part, nt;
	149	static Int_t irwn;
	150	//
	151	Float_t random[2];
fe4da5cc	152	//
886b6f73	153	FlukaInit();
	154	TChain *h2=fTreeChain;
	155	Int_t nentries = (Int_t) h2->GetEntries();
	156	if (fNpart == -1) fNpart=Int_t(nentries*fFrac);
fe4da5cc	157
fe4da5cc	158	// loop over number of particles
886b6f73	159	Int_t nb=0;
cfce8870	160	Int_t ev=gMC->CurrentEvent();
886b6f73	161	for (i=0; i<fNpart;i++) {
	162	Int_t entry=fNpart*(ev-1)+i;
	163	nb = (Int_t)h2->GetEvent(entry);
	164	if (irwn > nentries) {
	165	printf("No more entries in the FLUKA boundary source file\n");
	166	TFile *File=0;
	167	// Get AliRun object or create it
	168	if (!gAlice) {
	169	gAlice = (AliRun*)File->Get("gAlice");
	170	if (gAlice) printf("AliRun object found on file\n");
	171	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	172	}
	173	TTree *fAli=gAlice->TreeK();
	174	if (fAli) File =fAli->GetCurrentFile();
	175	File->cd();
	176	printf("Generate - I'm out \n");
	177	return;
	178	}
	179	if (Ip > 28 \|\| Ip < 0) {
	180	irwn++;
	181	continue;
	182	}
	183
	184	if ((Ip != fIkine && fIkine != 6 && fIkine != 9 && fIkine != 10) \|\| Age > fAgeMax){
	185	irwn++;
	186	continue;
	187	} else if (fIkine == 9) {
	188	if (Ip == 7 \|\| Ip == 8 \|\| Age > fAgeMax) {
	189	irwn++;
	190	continue;
	191	}
	192	} else if (fIkine == 10) {
	193	if (Ip == 8 \|\| Age > fAgeMax) {
	194	irwn++;
	195	continue;
	196	}
	197	}
fe4da5cc	198
fe4da5cc	199
886b6f73	200	irwn++;
	201	printf("\n Particle type: %f \n \n ", Ip);
	202
	203	if (Ip ==7){
	204	prwn=Ekin;
	205	part=1;
	206	} else if (Ip == 8) {
	207	prwn=Ekinsqrt(1. + 2.0.93956563/Ekin);
	208	part=13;
	209	} else {
	210	part=ifluge[int(Ip)-1];
	211	gMC->Gfpart(part, name, itrtyp,
	212	amass, charge, tlife);
	213	prwn=Ekinsqrt(1. + 2.amass/Ekin);
	214	}
	215	origin[0]=Yi;
	216	origin[1]=Xi;
	217	origin[2]=Zi;
	218
	219	p[0]=Py*prwn;
	220	p[1]=Px*prwn;
	221	p[2]=Pz*prwn;
fe4da5cc	222
886b6f73	223	//handle particle weight correctly
	224	wgt = (part == 13) ? Wgt*fAddWeight : Wgt;
	225	iwgt=Int_t(wgt);
	226	fwgt=wgt-Float_t(iwgt);
cfce8870	227	gMC->Rndm(random,2);
886b6f73	228	if (random[0] < fwgt) iwgt++;
	229	if (part==1 && iwgt>100) iwgt=100;
	230	Int_t nstack=0;
	231	for (j=0; j<iwgt; j++) {
	232	gAlice->SetTrack(fTrackIt,-1,part,p,origin,polar,Age,"Primary",nt);
	233	gMC->Rndm(random,2);
	234	phi=2random[1]TMath::Pi();
	235	Float_t pn1=p[0]TMath::Sin(phi) - p[1]TMath::Cos(phi);
	236	Float_t pn2=p[0]TMath::Cos(phi) + p[1]TMath::Sin(phi);
	237	p[0]=pn1;
	238	p[1]=pn2;
	239	Float_t on1=origin[0]TMath::Sin(phi)-origin[1]TMath::Cos(phi);
	240	Float_t on2=origin[0]TMath::Cos(phi)+origin[1]TMath::Sin(phi);
	241	origin[0]=on1;
	242	origin[1]=on2;
	243	nstack++;
	244	}
	245	if (nstack == 0) continue;
fe4da5cc	246	}
886b6f73	247
fe4da5cc	248	TFile *File=0;
	249	// Get AliRun object or create it
	250	if (!gAlice) {
	251	gAlice = (AliRun*)File->Get("gAlice");
	252	if (gAlice) printf("AliRun object found on file\n");
	253	if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
	254	}
	255	TTree *fAli=gAlice->TreeK();
	256	if (fAli) File =fAli->GetCurrentFile();
	257	File->cd();
	258	}
	259
	260
	261
	262
	263
	264
	265
	266
	267