[u/mrichter/AliRoot.git] / THerwig / THerwig6.cxx

// definition of c++ Class THerwig6 to be used in ROOT
// this is a c++ interface to the F77 Herwig6 program
// author: j. g. contreras jgcn@moni.mda.cinvestav.mx
// date: december 22, 2000
//  Class THerwig6 is an interface to the Herwig program
//
// C-----------------------------------------------------------------------
// C                           H E R W I G
// C
// C            a Monte Carlo event generator for simulating
// C        +---------------------------------------------------+
// C        | Hadron Emission Reactions With Interfering Gluons |
// C        +---------------------------------------------------+
// C I.G. Knowles(*), G. Marchesini(+), M.H. Seymour($) and B.R. Webber(#)
// C-----------------------------------------------------------------------
// C with Minimal Supersymmetric Standard Model Matrix Elements by
// C                  S. Moretti($) and K. Odagiri($)
// C-----------------------------------------------------------------------
// C R parity violating Supersymmetric Decays and Matrix Elements by
// C                          P. Richardson(&)
// C-----------------------------------------------------------------------
// C matrix element corrections to top decay and Drell-Yan type processes
// C                         by G. Corcella(+)
// C-----------------------------------------------------------------------
// C Deep Inelastic Scattering and Heavy Flavour Electroproduction by
// C                  G. Abbiendi(@) and L. Stanco(%)
// C-----------------------------------------------------------------------
// C and Jet Photoproduction in Lepton-Hadron Collisions by J. Chyla(~)
// C-----------------------------------------------------------------------
// C(*)  Department of Physics & Astronomy, University of Edinburgh
// C(+)  Dipartimento di Fisica, Universita di Milano
// C($)  Rutherford Appleton Laboratory
// C(#)  Cavendish Laboratory, Cambridge
// C(&)  Department of Physics, University of Oxford
// C(@)  Dipartimento di Fisica, Universita di Bologna
// C(%)  Dipartimento di Fisica, Universita di Padova
// C(~)  Institute of Physics, Prague
// C-----------------------------------------------------------------------
// C                  Version 6.100 - 16th December 1999
// C-----------------------------------------------------------------------
// C Main reference:
// C    G.Marchesini,  B.R.Webber,  G.Abbiendi,  I.G.Knowles,  M.H.Seymour,
// C    and L.Stanco, Computer Physics Communications 67 (1992) 465.
// C-----------------------------------------------------------------------
// C Please send e-mail about  this program  to one of the  authors at the
// C following Internet addresses:
// C    I.Knowles@ed.ac.uk        Giuseppe.Marchesini@mi.infn.it
// C    M.Seymour@rl.ac.uk        webber@hep.phy.cam.ac.uk
// C-----------------------------------------------------------------------


#include "THerwig6.h"
#include "TClonesArray.h"
#include "TParticle.h"
#include "TObjArray.h"


ClassImp(THerwig6)

extern "C" {
  void*  herwig6_common_block_address_(char*, int len);
  void   herwig6_open_fortran_file_ (int* lun, char* name, int);
  void   herwig6_close_fortran_file_(int* lun);
}


THerwig6::THerwig6() : TGenerator("Herwig6","Herwig6") {

// THerwig6 constructor: creates a TClonesArray in which it will store all
// particles. Note that there may be only one functional THerwig6 object
// at a time, so it's not use to create more than one instance of it.

  delete fParticles; // was allocated as TObjArray in TGenerator

  fParticles = new TClonesArray("TParticle",50);

  // initialize common-blocks
  fHepevt = (Hepevt_t*) herwig6_common_block_address_((char*)"HEPEVT",6);
  fHwbeam = (Hwbeam_t*) herwig6_common_block_address_((char*)"HWBEAM",6);
  fHwbmch = (Hwbmch_t*) herwig6_common_block_address_((char*)"HWBMCH",6);
  fHwproc = (Hwproc_t*) herwig6_common_block_address_((char*)"HWPROC",6);
  fHwpram = (Hwpram_t*) herwig6_common_block_address_((char*)"HWPRAM",6);
  fHwprch = (Hwprch_t*) herwig6_common_block_address_((char*)"HWPRCH",6);
  fHwpart = (Hwpart_t*) herwig6_common_block_address_((char*)"HWPART",6);
  fHwparp = (Hwparp_t*) herwig6_common_block_address_((char*)"HWPARP",6);
  fHwbosc = (Hwbosc_t*) herwig6_common_block_address_((char*)"HWBOSC",6);
  fHwparc = (Hwparc_t*) herwig6_common_block_address_((char*)"HWPARC",6);
  fHwbrch = (Hwbrch_t*) herwig6_common_block_address_((char*)"HWBRCH",6);
  fHwevnt = (Hwevnt_t*) herwig6_common_block_address_((char*)"HWEVNT",6);
  fHwhard = (Hwhard_t*) herwig6_common_block_address_((char*)"HWHARD",6);
  fHwprop = (Hwprop_t*) herwig6_common_block_address_((char*)"HWPROP",6);
  fHwunam = (Hwunam_t*) herwig6_common_block_address_((char*)"HWUNAM",6);
  fHwupdt = (Hwupdt_t*) herwig6_common_block_address_((char*)"HWUPDT",6);
  fHwuwts = (Hwuwts_t*) herwig6_common_block_address_((char*)"HWUWTS",6);
  fHwuclu = (Hwuclu_t*) herwig6_common_block_address_((char*)"HWUCLU",6);
  fHwdist = (Hwdist_t*) herwig6_common_block_address_((char*)"HWDIST",6);
  fHwqdks = (Hwqdks_t*) herwig6_common_block_address_((char*)"HWQDKS",6);
  fHwusud = (Hwusud_t*) herwig6_common_block_address_((char*)"HWUSUD",6);
  fHwsusy = (Hwsusy_t*) herwig6_common_block_address_((char*)"HWSUSY",6);
  fHwrpar = (Hwrpar_t*) herwig6_common_block_address_((char*)"HWRPAR",6);
  fHwminb = (Hwminb_t*) herwig6_common_block_address_((char*)"HWMINB",6);
  fHwclus = (Hwclus_t*) herwig6_common_block_address_((char*)"HWCLUS",6);
 }

//------------------------------------------------------------------------------
 THerwig6::~THerwig6()
 {
// Destroys the object, deletes and disposes all TParticles currently on list.

    if (fParticles) {
      fParticles->Delete();
      delete fParticles;
      fParticles = 0;
   }
 }

//______________________________________________________________________________
void THerwig6::GenerateEvent() 
{
  
  //initialize event
  hwuine_();
  // generate hard subprocess
  hwepro_();
  // generate parton cascades
  hwbgen_();
  // do heavy objects decay
  hwdhob_();
  // do cluster formation
  hwcfor_();
  // do cluster decays
  hwcdec_();
  // do unstable particle decays
  hwdhad_();
  // do heavy flavor hadrons decay
  hwdhvy_();
  // add soft underlying event
  hwmevt_();
  // finish event
  hwufne_();
}

//______________________________________________________________________________
void THerwig6::OpenFortranFile(int lun, char* name) {
  herwig6_open_fortran_file_(&lun, name, strlen(name));
}

//______________________________________________________________________________
void THerwig6::CloseFortranFile(int lun) {
  herwig6_close_fortran_file_(&lun);
}

void THerwig6::Initialize(const char *beam, const char *target, double pbeam1, double pbeam2, int iproc)

{
  // perform the initialization for Herwig6
  // sets correct title. 
  // after calling this method all parameters are set to their default
  // values. If you want to modify any parameter you have to set the new
  // value after calling Initialize and before PrepareRun.

   char  cbeam[8];
   strncpy(cbeam,beam,8);
   char  ctarget[8];
   strncpy(ctarget,target,8);
   printf("\n Initializing Herwig !! \n");
   if ( (!strncmp(beam, "E+"    ,2)) &&
        (!strncmp(beam, "E-"    ,2)) &&
        (!strncmp(beam, "MU+"   ,3)) &&
        (!strncmp(beam, "MU-"   ,3)) &&
        (!strncmp(beam, "NUE"   ,3)) &&
        (!strncmp(beam, "NUEB"  ,4)) &&
        (!strncmp(beam, "NUMU"  ,4)) &&
        (!strncmp(beam, "NMUB"  ,4)) &&
        (!strncmp(beam, "NTAU"  ,4)) &&
        (!strncmp(beam, "NTAB"  ,4)) &&
        (!strncmp(beam, "GAMA"  ,4)) &&
        (!strncmp(beam, "P       ",8)) &&
        (!strncmp(beam, "PBAR    ",8)) &&
        (!strncmp(beam, "N"     ,1)) &&
        (!strncmp(beam, "NBAR"  ,4)) &&
        (!strncmp(beam, "PI+"   ,3)) &&
        (!strncmp(beam, "PI-"   ,3)) ) {
      printf("WARNING! In THerwig6:Initialize():\n");
      printf(" specified beam=%s is unrecognized .\n",beam);
      printf(" resetting to \"P\" .");
      sprintf(cbeam,"P");
   }

   if ( (!strncmp(target, "E+"    ,2)) &&
        (!strncmp(target, "E-"    ,2)) &&
        (!strncmp(target, "MU+"   ,3)) &&
        (!strncmp(target, "MU-"   ,3)) &&
        (!strncmp(target, "NUE"   ,3)) &&
        (!strncmp(target, "NUEB"  ,4)) &&
        (!strncmp(target, "NUMU"  ,4)) &&
        (!strncmp(target, "NMUB"  ,4)) &&
        (!strncmp(target, "NTAU"  ,4)) &&
        (!strncmp(target, "NTAB"  ,4)) &&
        (!strncmp(target, "GAMA"  ,4)) &&
        (!strncmp(target, "P       ",8)) &&
        (!strncmp(target, "PBAR    ",8)) &&
        (!strncmp(target, "N"     ,1)) &&
        (!strncmp(target, "NBAR"  ,4)) &&
        (!strncmp(target, "PI+"   ,3)) &&
        (!strncmp(target, "PI-"   ,3)) ) {
      printf("WARNING! In THerwig6:Initialize():\n");
      printf(" specified target=%s is unrecognized .\n",target);
      printf(" resetting to \"P\" .");
      sprintf(ctarget,"P");
   }

   // initialization:
   // type of beams
   strncpy(fHwbmch->PART1,beam,8);
   strncpy(fHwbmch->PART2,target,8);
   // momentum of beams
   fHwproc->PBEAM1=pbeam1;
   fHwproc->PBEAM2=pbeam2;
   // process to generate
   fHwproc->IPROC=iproc;
   // not used in the class definition 
   fHwproc->MAXEV=1;

   // reset all parameters
   hwigin_();
   
   // set correct title
   char atitle[132];
   double win=pbeam1+pbeam2;
   printf("\n %s - %s at %g GeV",beam,target,win);
   sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win);
   SetTitle(atitle); 
}

void THerwig6::PrepareRun()
{
  // compute parameter dependent constants
  hwuinc_();
  // initialize elementary processes
  hweini_();
}

//______________________________________________________________________________
TObjArray* THerwig6::ImportParticles(Option_t *option)
{
//
//  Default primary creation method. It reads the /HEPEVT/ common block which
//  has been filled by the GenerateEvent method. If the event generator does
//  not use the HEPEVT common block, This routine has to be overloaded by
//  the subclasses.
//  The default action is to store only the stable particles (ISTHEP = 1)
//  This can be demanded explicitly by setting the option = "Final"
//  If the option = "All", all the particles are stored.
//
  fParticles->Clear();
  Int_t numpart = fHepevt->NHEP;
  TClonesArray &a = *((TClonesArray*)fParticles);
  if (!strcmp(option,"") || !strcmp(option,"Final")) {
    for (Int_t i = 0; i<=numpart; i++) {
      if (fHepevt->ISTHEP[i] == 1) {
//
//  Use the common block values for the TParticle constructor
//
        new(a[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
        }
     }
  }
  else if (!strcmp(option,"All")) {
    for (Int_t i = 0; i<=numpart; i++) {
      new(a[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
    }
  }
  return fParticles;
}

//______________________________________________________________________________
Int_t THerwig6::ImportParticles(TClonesArray *particles, Option_t *option)
{
//
//  Default primary creation method. It reads the /HEPEVT/ common block which
//  has been filled by the GenerateEvent method. If the event generator does
//  not use the HEPEVT common block, This routine has to be overloaded by
//  the subclasses.
//  The function loops on the generated particles and store them in
//  the TClonesArray pointed by the argument particles.
//  The default action is to store only the stable particles (ISTHEP = 1)
//  This can be demanded explicitly by setting the option = "Final"
//  If the option = "All", all the particles are stored.
//
  if (particles == 0) return 0;
  TClonesArray &refParticles = *particles;
  refParticles.Clear();
  Int_t numpart = fHepevt->NHEP;
  if (!strcmp(option,"") || !strcmp(option,"Final")) {
    for (Int_t i = 0; i< numpart; i++) {
      if (fHepevt->ISTHEP[i] == 1) {
//
//  Use the common block values for the TParticle constructor
//
        new(refParticles[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
        }
     }
  }
  else if (!strcmp(option,"All")) {
    for (Int_t i = 0; i< numpart; i++) {
      new(refParticles[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
    }
  }
  return numpart;
}

void THerwig6::Hwigin()
{
  hwigin_();
}

void THerwig6::Hwuinc()
{
  hwuinc_();
}

void THerwig6::Hwusta(char* name)

{
  hwusta_(name,8);
}

void THerwig6::Hweini()

{
  hweini_();
}

void THerwig6::Hwuine()

{
  hwuine_();
}

void THerwig6::Hwepro()

{
  hwepro_();
}

void THerwig6::Hwbgen()

{
  hwbgen_();
}

void THerwig6::Hwdhob()

{
  hwdhob_();
}

void THerwig6::Hwcfor()

{
  hwcfor_();
}

void THerwig6::Hwcdec()

{
  hwcdec_();
}

void THerwig6::Hwdhad()

{
  hwdhad_();
}

void THerwig6::Hwdhvy()

{
  hwdhvy_();
}

void THerwig6::Hwmevt()

{
  hwmevt_();
}

void THerwig6::Hwufne()

{
  hwufne_();
}

void THerwig6::Hwefin()

{
  hwefin_();
}

void THerwig6::SetupTest()
{
  // exampe of running herwig and generating one event
  // after changing some options
  Initialize("P","PBAR",900.,900.,1500);
  // here you can set some parameters
  SetPTMIN(15.); // Min pt in hadronic jet production
  SetYJMIN(-4.); // Min jet rapidity
  SetYJMAX(4.);  // Max jet rapidity
  // after you set your wished parameters
  // herwig can do its work
  PrepareRun();
  int nEvToGenerate=1;
  for (int i=0;i<nEvToGenerate;i++)
    {
      GenerateEvent();
      // do your stuff. For ex:
      int nOfPar=GetNumberOfParticles(); // from TGenerator
      for (int j=0; j<nOfPar; j++)
	{
	  TParticle* p=GetParticle(j);
	  // here you do whatever you want with the particle
	  p->Print();
	};
    };
}
Commit	Line	Data
2d8d4543	1	// definition of c++ Class THerwig6 to be used in ROOT
	2	// this is a c++ interface to the F77 Herwig6 program
	3	// author: j. g. contreras jgcn@moni.mda.cinvestav.mx
	4	// date: december 22, 2000
884ccf6a	5	// Class THerwig6 is an interface to the Herwig program
	6	//
	7	// C-----------------------------------------------------------------------
	8	// C H E R W I G
	9	// C
	10	// C a Monte Carlo event generator for simulating
	11	// C +---------------------------------------------------+
	12	// C \| Hadron Emission Reactions With Interfering Gluons \|
	13	// C +---------------------------------------------------+
	14	// C I.G. Knowles(*), G. Marchesini(+), M.H. Seymour($) and B.R. Webber(#)
	15	// C-----------------------------------------------------------------------
	16	// C with Minimal Supersymmetric Standard Model Matrix Elements by
	17	// C S. Moretti($) and K. Odagiri($)
	18	// C-----------------------------------------------------------------------
	19	// C R parity violating Supersymmetric Decays and Matrix Elements by
	20	// C P. Richardson(&)
	21	// C-----------------------------------------------------------------------
	22	// C matrix element corrections to top decay and Drell-Yan type processes
	23	// C by G. Corcella(+)
	24	// C-----------------------------------------------------------------------
	25	// C Deep Inelastic Scattering and Heavy Flavour Electroproduction by
	26	// C G. Abbiendi(@) and L. Stanco(%)
	27	// C-----------------------------------------------------------------------
	28	// C and Jet Photoproduction in Lepton-Hadron Collisions by J. Chyla(~)
	29	// C-----------------------------------------------------------------------
	30	// C(*) Department of Physics & Astronomy, University of Edinburgh
	31	// C(+) Dipartimento di Fisica, Universita di Milano
	32	// C($) Rutherford Appleton Laboratory
	33	// C(#) Cavendish Laboratory, Cambridge
	34	// C(&) Department of Physics, University of Oxford
	35	// C(@) Dipartimento di Fisica, Universita di Bologna
	36	// C(%) Dipartimento di Fisica, Universita di Padova
	37	// C(~) Institute of Physics, Prague
	38	// C-----------------------------------------------------------------------
	39	// C Version 6.100 - 16th December 1999
	40	// C-----------------------------------------------------------------------
	41	// C Main reference:
	42	// C G.Marchesini, B.R.Webber, G.Abbiendi, I.G.Knowles, M.H.Seymour,
	43	// C and L.Stanco, Computer Physics Communications 67 (1992) 465.
	44	// C-----------------------------------------------------------------------
	45	// C Please send e-mail about this program to one of the authors at the
	46	// C following Internet addresses:
	47	// C I.Knowles@ed.ac.uk Giuseppe.Marchesini@mi.infn.it
	48	// C M.Seymour@rl.ac.uk webber@hep.phy.cam.ac.uk
	49	// C-----------------------------------------------------------------------
	50
2d8d4543	51
2d8d4543	52	#include "THerwig6.h"
	53	#include "TClonesArray.h"
	54	#include "TParticle.h"
884ccf6a	55	#include "TObjArray.h"
2d8d4543	56
	57
	58	ClassImp(THerwig6)
	59
	60	extern "C" {
	61	void* herwig6_common_block_address_(char*, int len);
	62	void herwig6_open_fortran_file_ (int* lun, char* name, int);
	63	void herwig6_close_fortran_file_(int* lun);
	64	}
	65
	66
	67	THerwig6::THerwig6() : TGenerator("Herwig6","Herwig6") {
	68
	69	// THerwig6 constructor: creates a TClonesArray in which it will store all
	70	// particles. Note that there may be only one functional THerwig6 object
	71	// at a time, so it's not use to create more than one instance of it.
	72
	73	delete fParticles; // was allocated as TObjArray in TGenerator
	74
	75	fParticles = new TClonesArray("TParticle",50);
	76
	77	// initialize common-blocks
	78	fHepevt = (Hepevt_t) herwig6_common_block_address_((char)"HEPEVT",6);
	79	fHwbeam = (Hwbeam_t) herwig6_common_block_address_((char)"HWBEAM",6);
	80	fHwbmch = (Hwbmch_t) herwig6_common_block_address_((char)"HWBMCH",6);
	81	fHwproc = (Hwproc_t) herwig6_common_block_address_((char)"HWPROC",6);
	82	fHwpram = (Hwpram_t) herwig6_common_block_address_((char)"HWPRAM",6);
	83	fHwprch = (Hwprch_t) herwig6_common_block_address_((char)"HWPRCH",6);
	84	fHwpart = (Hwpart_t) herwig6_common_block_address_((char)"HWPART",6);
	85	fHwparp = (Hwparp_t) herwig6_common_block_address_((char)"HWPARP",6);
	86	fHwbosc = (Hwbosc_t) herwig6_common_block_address_((char)"HWBOSC",6);
	87	fHwparc = (Hwparc_t) herwig6_common_block_address_((char)"HWPARC",6);
	88	fHwbrch = (Hwbrch_t) herwig6_common_block_address_((char)"HWBRCH",6);
	89	fHwevnt = (Hwevnt_t) herwig6_common_block_address_((char)"HWEVNT",6);
	90	fHwhard = (Hwhard_t) herwig6_common_block_address_((char)"HWHARD",6);
	91	fHwprop = (Hwprop_t) herwig6_common_block_address_((char)"HWPROP",6);
	92	fHwunam = (Hwunam_t) herwig6_common_block_address_((char)"HWUNAM",6);
	93	fHwupdt = (Hwupdt_t) herwig6_common_block_address_((char)"HWUPDT",6);
	94	fHwuwts = (Hwuwts_t) herwig6_common_block_address_((char)"HWUWTS",6);
	95	fHwuclu = (Hwuclu_t) herwig6_common_block_address_((char)"HWUCLU",6);
	96	fHwdist = (Hwdist_t) herwig6_common_block_address_((char)"HWDIST",6);
	97	fHwqdks = (Hwqdks_t) herwig6_common_block_address_((char)"HWQDKS",6);
	98	fHwusud = (Hwusud_t) herwig6_common_block_address_((char)"HWUSUD",6);
	99	fHwsusy = (Hwsusy_t) herwig6_common_block_address_((char)"HWSUSY",6);
	100	fHwrpar = (Hwrpar_t) herwig6_common_block_address_((char)"HWRPAR",6);
	101	fHwminb = (Hwminb_t) herwig6_common_block_address_((char)"HWMINB",6);
	102	fHwclus = (Hwclus_t) herwig6_common_block_address_((char)"HWCLUS",6);
	103	}
	104
	105	//------------------------------------------------------------------------------
	106	THerwig6::~THerwig6()
	107	{
	108	// Destroys the object, deletes and disposes all TParticles currently on list.
	109
	110	if (fParticles) {
	111	fParticles->Delete();
	112	delete fParticles;
	113	fParticles = 0;
	114	}
	115	}
	116
	117	//______________________________________________________________________________
	118	void THerwig6::GenerateEvent()
	119	{
120
121	//initialize event
122	hwuine_();
123	// generate hard subprocess
124	hwepro_();
125	// generate parton cascades
126	hwbgen_();
127	// do heavy objects decay
128	hwdhob_();
129	// do cluster formation
130	hwcfor_();
131	// do cluster decays
132	hwcdec_();
133	// do unstable particle decays
134	hwdhad_();
135	// do heavy flavor hadrons decay
136	hwdhvy_();
137	// add soft underlying event
138	hwmevt_();
139	// finish event
140	hwufne_();
141	}
142
143	//______________________________________________________________________________
144	void THerwig6::OpenFortranFile(int lun, char* name) {
145	herwig6_open_fortran_file_(&lun, name, strlen(name));
146	}
147
148	//______________________________________________________________________________
149	void THerwig6::CloseFortranFile(int lun) {
150	herwig6_close_fortran_file_(&lun);
151	}
152
153	void THerwig6::Initialize(const char beam, const char target, double pbeam1, double pbeam2, int iproc)
154
155	{
156	// perform the initialization for Herwig6
157	// sets correct title.
158	// after calling this method all parameters are set to their default
159	// values. If you want to modify any parameter you have to set the new
160	// value after calling Initialize and before PrepareRun.
161
162	char cbeam[8];
163	strncpy(cbeam,beam,8);
164	char ctarget[8];
165	strncpy(ctarget,target,8);
166	printf("\n Initializing Herwig !! \n");
167	if ( (!strncmp(beam, "E+" ,2)) &&
168	(!strncmp(beam, "E-" ,2)) &&
169	(!strncmp(beam, "MU+" ,3)) &&
170	(!strncmp(beam, "MU-" ,3)) &&
171	(!strncmp(beam, "NUE" ,3)) &&
172	(!strncmp(beam, "NUEB" ,4)) &&
173	(!strncmp(beam, "NUMU" ,4)) &&
174	(!strncmp(beam, "NMUB" ,4)) &&
175	(!strncmp(beam, "NTAU" ,4)) &&
176	(!strncmp(beam, "NTAB" ,4)) &&
177	(!strncmp(beam, "GAMA" ,4)) &&
178	(!strncmp(beam, "P ",8)) &&
179	(!strncmp(beam, "PBAR ",8)) &&
180	(!strncmp(beam, "N" ,1)) &&
181	(!strncmp(beam, "NBAR" ,4)) &&
182	(!strncmp(beam, "PI+" ,3)) &&
183	(!strncmp(beam, "PI-" ,3)) ) {
184	printf("WARNING! In THerwig6:Initialize():\n");
185	printf(" specified beam=%s is unrecognized .\n",beam);
186	printf(" resetting to \"P\" .");
187	sprintf(cbeam,"P");
188	}
189
190	if ( (!strncmp(target, "E+" ,2)) &&
191	(!strncmp(target, "E-" ,2)) &&
192	(!strncmp(target, "MU+" ,3)) &&
193	(!strncmp(target, "MU-" ,3)) &&
194	(!strncmp(target, "NUE" ,3)) &&
195	(!strncmp(target, "NUEB" ,4)) &&
196	(!strncmp(target, "NUMU" ,4)) &&
197	(!strncmp(target, "NMUB" ,4)) &&
198	(!strncmp(target, "NTAU" ,4)) &&
199	(!strncmp(target, "NTAB" ,4)) &&
200	(!strncmp(target, "GAMA" ,4)) &&
201	(!strncmp(target, "P ",8)) &&
202	(!strncmp(target, "PBAR ",8)) &&
203	(!strncmp(target, "N" ,1)) &&
204	(!strncmp(target, "NBAR" ,4)) &&
205	(!strncmp(target, "PI+" ,3)) &&
206	(!strncmp(target, "PI-" ,3)) ) {
207	printf("WARNING! In THerwig6:Initialize():\n");
208	printf(" specified target=%s is unrecognized .\n",target);
209	printf(" resetting to \"P\" .");
210	sprintf(ctarget,"P");
211	}
212
213	// initialization:
214	// type of beams
215	strncpy(fHwbmch->PART1,beam,8);
216	strncpy(fHwbmch->PART2,target,8);
217	// momentum of beams
218	fHwproc->PBEAM1=pbeam1;
219	fHwproc->PBEAM2=pbeam2;
220	// process to generate
221	fHwproc->IPROC=iproc;
222	// not used in the class definition
223	fHwproc->MAXEV=1;
224
225	// reset all parameters
226	hwigin_();
227
228	// set correct title
229	char atitle[132];
230	double win=pbeam1+pbeam2;
231	printf("\n %s - %s at %g GeV",beam,target,win);
232	sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win);
233	SetTitle(atitle);
234	}
235
236	void THerwig6::PrepareRun()
237	{
238	// compute parameter dependent constants
239	hwuinc_();
240	// initialize elementary processes
241	hweini_();
242	}
243
244	//______________________________________________________________________________
245	TObjArray* THerwig6::ImportParticles(Option_t *option)
246	{
247	//
248	// Default primary creation method. It reads the /HEPEVT/ common block which
249	// has been filled by the GenerateEvent method. If the event generator does
250	// not use the HEPEVT common block, This routine has to be overloaded by
251	// the subclasses.
252	// The default action is to store only the stable particles (ISTHEP = 1)
253	// This can be demanded explicitly by setting the option = "Final"
254	// If the option = "All", all the particles are stored.
255	//
256	fParticles->Clear();
257	Int_t numpart = fHepevt->NHEP;
258	TClonesArray &a = ((TClonesArray)fParticles);
259	if (!strcmp(option,"") \|\| !strcmp(option,"Final")) {
260	for (Int_t i = 0; i<=numpart; i++) {
261	if (fHepevt->ISTHEP[i] == 1) {
262	//
263	// Use the common block values for the TParticle constructor
264	//
265	new(a[i]) TParticle(
266	fHepevt->IDHEP[i],
267	fHepevt->ISTHEP[i],
268	fHepevt->JMOHEP[i][0]-1,
269	fHepevt->JMOHEP[i][1]-1,
270	fHepevt->JDAHEP[i][0]-1,
271	fHepevt->JDAHEP[i][1]-1,
272
273	fHepevt->PHEP[i][0],
274	fHepevt->PHEP[i][1],
275	fHepevt->PHEP[i][2],
276	fHepevt->PHEP[i][3],
277	fHepevt->VHEP[i][0],
278	fHepevt->VHEP[i][1],
279	fHepevt->VHEP[i][2],
280	fHepevt->VHEP[i][3]);
281	}
282	}
283	}
284	else if (!strcmp(option,"All")) {
285	for (Int_t i = 0; i<=numpart; i++) {
286	new(a[i]) TParticle(
287	fHepevt->IDHEP[i],
288	fHepevt->ISTHEP[i],
289	fHepevt->JMOHEP[i][0]-1,
290	fHepevt->JMOHEP[i][1]-1,
291	fHepevt->JDAHEP[i][0]-1,
292	fHepevt->JDAHEP[i][1]-1,
293
294	fHepevt->PHEP[i][0],
295	fHepevt->PHEP[i][1],
296	fHepevt->PHEP[i][2],
297	fHepevt->PHEP[i][3],
298	fHepevt->VHEP[i][0],
299	fHepevt->VHEP[i][1],
300	fHepevt->VHEP[i][2],
301	fHepevt->VHEP[i][3]);
302	}
303	}
304	return fParticles;
305	}
306
307	//______________________________________________________________________________
308	Int_t THerwig6::ImportParticles(TClonesArray particles, Option_t option)
309	{
310	//
311	// Default primary creation method. It reads the /HEPEVT/ common block which
312	// has been filled by the GenerateEvent method. If the event generator does
313	// not use the HEPEVT common block, This routine has to be overloaded by
314	// the subclasses.
315	// The function loops on the generated particles and store them in
316	// the TClonesArray pointed by the argument particles.
317	// The default action is to store only the stable particles (ISTHEP = 1)
318	// This can be demanded explicitly by setting the option = "Final"
319	// If the option = "All", all the particles are stored.
320	//
321	if (particles == 0) return 0;
884ccf6a	322	TClonesArray &refParticles = *particles;
884ccf6a	323	refParticles.Clear();
2d8d4543	324	Int_t numpart = fHepevt->NHEP;
	325	if (!strcmp(option,"") \|\| !strcmp(option,"Final")) {
	326	for (Int_t i = 0; i< numpart; i++) {
	327	if (fHepevt->ISTHEP[i] == 1) {
	328	//
	329	// Use the common block values for the TParticle constructor
	330	//
884ccf6a	331	new(refParticles[i]) TParticle(
2d8d4543	332	fHepevt->IDHEP[i],
	333	fHepevt->ISTHEP[i],
	334	fHepevt->JMOHEP[i][0]-1,
	335	fHepevt->JMOHEP[i][1]-1,
	336	fHepevt->JDAHEP[i][0]-1,
	337	fHepevt->JDAHEP[i][1]-1,
	338
	339	fHepevt->PHEP[i][0],
	340	fHepevt->PHEP[i][1],
	341	fHepevt->PHEP[i][2],
	342	fHepevt->PHEP[i][3],
	343	fHepevt->VHEP[i][0],
	344	fHepevt->VHEP[i][1],
	345	fHepevt->VHEP[i][2],
	346	fHepevt->VHEP[i][3]);
	347	}
	348	}
	349	}
	350	else if (!strcmp(option,"All")) {
	351	for (Int_t i = 0; i< numpart; i++) {
884ccf6a	352	new(refParticles[i]) TParticle(
2d8d4543	353	fHepevt->IDHEP[i],
	354	fHepevt->ISTHEP[i],
	355	fHepevt->JMOHEP[i][0]-1,
	356	fHepevt->JMOHEP[i][1]-1,
	357	fHepevt->JDAHEP[i][0]-1,
	358	fHepevt->JDAHEP[i][1]-1,
	359
	360	fHepevt->PHEP[i][0],
	361	fHepevt->PHEP[i][1],
	362	fHepevt->PHEP[i][2],
	363	fHepevt->PHEP[i][3],
	364	fHepevt->VHEP[i][0],
	365	fHepevt->VHEP[i][1],
	366	fHepevt->VHEP[i][2],
	367	fHepevt->VHEP[i][3]);
	368	}
	369	}
	370	return numpart;
	371	}
	372
	373	void THerwig6::Hwigin()
	374	{
	375	hwigin_();
	376	}
	377
	378	void THerwig6::Hwuinc()
	379	{
	380	hwuinc_();
	381	}
	382
	383	void THerwig6::Hwusta(char* name)
	384
	385	{
	386	hwusta_(name,8);
	387	}
	388
	389	void THerwig6::Hweini()
	390
	391	{
	392	hweini_();
	393	}
	394
	395	void THerwig6::Hwuine()
	396
	397	{
	398	hwuine_();
	399	}
	400
	401	void THerwig6::Hwepro()
	402
	403	{
	404	hwepro_();
	405	}
	406
	407	void THerwig6::Hwbgen()
	408
	409	{
	410	hwbgen_();
	411	}
	412
	413	void THerwig6::Hwdhob()
	414
	415	{
	416	hwdhob_();
417	}
418
419	void THerwig6::Hwcfor()
420
421	{
422	hwcfor_();
423	}
424
425	void THerwig6::Hwcdec()
426
427	{
428	hwcdec_();
429	}
430
431	void THerwig6::Hwdhad()
432
433	{
434	hwdhad_();
435	}
436
437	void THerwig6::Hwdhvy()
438
439	{
440	hwdhvy_();
441	}
442
443	void THerwig6::Hwmevt()
444
445	{
446	hwmevt_();
447	}
448
449	void THerwig6::Hwufne()
450
451	{
452	hwufne_();
453	}
454
455	void THerwig6::Hwefin()
456
457	{
458	hwefin_();
459	}
460
461	void THerwig6::SetupTest()
462	{
463	// exampe of running herwig and generating one event
464	// after changing some options
465	Initialize("P","PBAR",900.,900.,1500);
466	// here you can set some parameters
467	SetPTMIN(15.); // Min pt in hadronic jet production
468	SetYJMIN(-4.); // Min jet rapidity
469	SetYJMAX(4.); // Max jet rapidity
470	// after you set your wished parameters
471	// herwig can do its work
472	PrepareRun();
884ccf6a	473	int nEvToGenerate=1;
884ccf6a	474	for (int i=0;i<nEvToGenerate;i++)
2d8d4543	475	{
	476	GenerateEvent();
	477	// do your stuff. For ex:
884ccf6a	478	int nOfPar=GetNumberOfParticles(); // from TGenerator
884ccf6a	479	for (int j=0; j<nOfPar; j++)
2d8d4543	480	{
	481	TParticle* p=GetParticle(j);
	482	// here you do whatever you want with the particle
	483	p->Print();
	484	};
	485	};
	486	}
	487
	488
	489
	490
	491