ReadRaw(): TGraphs are created once per event (B.Polichtchouk)
[u/mrichter/AliRoot.git] / THerwig / THerwig6.cxx
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
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
51
52 #include "THerwig6.h"
53 #include "TClonesArray.h"
54 #include "TParticle.h"
55 #include "TObjArray.h"
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   fHepevt((Hepevt_t*) herwig6_common_block_address_((char*)"HEPEVT",6)),
69   fHwbeam((Hwbeam_t*) herwig6_common_block_address_((char*)"HWBEAM",6)),
70   fHwbmch((Hwbmch_t*) herwig6_common_block_address_((char*)"HWBMCH",6)),
71   fHwproc((Hwproc_t*) herwig6_common_block_address_((char*)"HWPROC",6)),
72   fHwpram((Hwpram_t*) herwig6_common_block_address_((char*)"HWPRAM",6)),
73   fHwprch((Hwprch_t*) herwig6_common_block_address_((char*)"HWPRCH",6)),
74   fHwpart((Hwpart_t*) herwig6_common_block_address_((char*)"HWPART",6)),
75   fHwparp((Hwparp_t*) herwig6_common_block_address_((char*)"HWPARP",6)),
76   fHwbosc((Hwbosc_t*) herwig6_common_block_address_((char*)"HWBOSC",6)),
77   fHwparc((Hwparc_t*) herwig6_common_block_address_((char*)"HWPARC",6)),
78   fHwbrch((Hwbrch_t*) herwig6_common_block_address_((char*)"HWBRCH",6)),
79   fHwevnt((Hwevnt_t*) herwig6_common_block_address_((char*)"HWEVNT",6)),
80   fHwhard((Hwhard_t*) herwig6_common_block_address_((char*)"HWHARD",6)),
81   fHwprop((Hwprop_t*) herwig6_common_block_address_((char*)"HWPROP",6)),
82   fHwunam((Hwunam_t*) herwig6_common_block_address_((char*)"HWUNAM",6)),
83   fHwupdt((Hwupdt_t*) herwig6_common_block_address_((char*)"HWUPDT",6)),
84   fHwuwts((Hwuwts_t*) herwig6_common_block_address_((char*)"HWUWTS",6)),
85   fHwuclu((Hwuclu_t*) herwig6_common_block_address_((char*)"HWUCLU",6)),
86   fHwdist((Hwdist_t*) herwig6_common_block_address_((char*)"HWDIST",6)),
87   fHwqdks((Hwqdks_t*) herwig6_common_block_address_((char*)"HWQDKS",6)),
88   fHwusud((Hwusud_t*) herwig6_common_block_address_((char*)"HWUSUD",6)),
89   fHwsusy((Hwsusy_t*) herwig6_common_block_address_((char*)"HWSUSY",6)),
90   fHwrpar((Hwrpar_t*) herwig6_common_block_address_((char*)"HWRPAR",6)),
91   fHwminb((Hwminb_t*) herwig6_common_block_address_((char*)"HWMINB",6)),
92   fHwclus((Hwclus_t*) herwig6_common_block_address_((char*)"HWCLUS",6)),
93   fHwgrav((Hwgrav_t*) herwig6_common_block_address_((char*)"HWGRAV",6)),
94   fHw6202((Hw6202_t*) herwig6_common_block_address_((char*)"HW6202",6)),
95   fHw6203((Hw6203_t*) herwig6_common_block_address_((char*)"HW6203",6)),
96   fHw6300((Hw6300_t*) herwig6_common_block_address_((char*)"HW6300",6)),
97   fHwpmrs((Hwpmrs_t*) herwig6_common_block_address_((char*)"HWPMRS",6)),
98   fHwcirc((Hwcirc_t*) herwig6_common_block_address_((char*)"HWCIRC",6)),
99   fHwdspb((Hwdspb_t*) herwig6_common_block_address_((char*)"HWDSPB",6)),
100   fHwdsp2((Hwdsp2_t*) herwig6_common_block_address_((char*)"HWDSP2",6)),
101   fHwdsp3((Hwdsp3_t*) herwig6_common_block_address_((char*)"HWDSP3",6)),
102   fHwdsp4((Hwdsp4_t*) herwig6_common_block_address_((char*)"HWDSP4",6)),
103   fHwdspn((Hwdspn_t*) herwig6_common_block_address_((char*)"HWDSPN",6)),
104   fHwspin((Hwspin_t*) herwig6_common_block_address_((char*)"HWSPIN",6)),
105   fHwstau((Hwstau_t*) herwig6_common_block_address_((char*)"HWSTAU",6)),
106   fHwgupr((Hwgupr_t*) herwig6_common_block_address_((char*)"HWGUPR",6)),
107   fHw6500((Hw6500_t*) herwig6_common_block_address_((char*)"HW6500",6)),
108   fHw6504((Hw6504_t*) herwig6_common_block_address_((char*)"HW6504",6)),
109   fHw6506((Hw6506_t*) herwig6_common_block_address_((char*)"HW6506",6))
110 {
111
112 // THerwig6 constructor: creates a TClonesArray in which it will store all
113 // particles. Note that there may be only one functional THerwig6 object
114 // at a time, so it's not use to create more than one instance of it.
115
116   delete fParticles; // was allocated as TObjArray in TGenerator
117   fParticles = new TClonesArray("TParticle",50);
118
119   // initialize common-blocks
120  }
121
122 THerwig6::THerwig6(const THerwig6 & source): TGenerator(source), 
123   fHepevt((Hepevt_t*) herwig6_common_block_address_((char*)"HEPEVT",6)),
124   fHwbeam((Hwbeam_t*) herwig6_common_block_address_((char*)"HWBEAM",6)),
125   fHwbmch((Hwbmch_t*) herwig6_common_block_address_((char*)"HWBMCH",6)),
126   fHwproc((Hwproc_t*) herwig6_common_block_address_((char*)"HWPROC",6)),
127   fHwpram((Hwpram_t*) herwig6_common_block_address_((char*)"HWPRAM",6)),
128   fHwprch((Hwprch_t*) herwig6_common_block_address_((char*)"HWPRCH",6)),
129   fHwpart((Hwpart_t*) herwig6_common_block_address_((char*)"HWPART",6)),
130   fHwparp((Hwparp_t*) herwig6_common_block_address_((char*)"HWPARP",6)),
131   fHwbosc((Hwbosc_t*) herwig6_common_block_address_((char*)"HWBOSC",6)),
132   fHwparc((Hwparc_t*) herwig6_common_block_address_((char*)"HWPARC",6)),
133   fHwbrch((Hwbrch_t*) herwig6_common_block_address_((char*)"HWBRCH",6)),
134   fHwevnt((Hwevnt_t*) herwig6_common_block_address_((char*)"HWEVNT",6)),
135   fHwhard((Hwhard_t*) herwig6_common_block_address_((char*)"HWHARD",6)),
136   fHwprop((Hwprop_t*) herwig6_common_block_address_((char*)"HWPROP",6)),
137   fHwunam((Hwunam_t*) herwig6_common_block_address_((char*)"HWUNAM",6)),
138   fHwupdt((Hwupdt_t*) herwig6_common_block_address_((char*)"HWUPDT",6)),
139   fHwuwts((Hwuwts_t*) herwig6_common_block_address_((char*)"HWUWTS",6)),
140   fHwuclu((Hwuclu_t*) herwig6_common_block_address_((char*)"HWUCLU",6)),
141   fHwdist((Hwdist_t*) herwig6_common_block_address_((char*)"HWDIST",6)),
142   fHwqdks((Hwqdks_t*) herwig6_common_block_address_((char*)"HWQDKS",6)),
143   fHwusud((Hwusud_t*) herwig6_common_block_address_((char*)"HWUSUD",6)),
144   fHwsusy((Hwsusy_t*) herwig6_common_block_address_((char*)"HWSUSY",6)),
145   fHwrpar((Hwrpar_t*) herwig6_common_block_address_((char*)"HWRPAR",6)),
146   fHwminb((Hwminb_t*) herwig6_common_block_address_((char*)"HWMINB",6)),
147   fHwclus((Hwclus_t*) herwig6_common_block_address_((char*)"HWCLUS",6)),
148   fHwgrav((Hwgrav_t*) herwig6_common_block_address_((char*)"HWGRAV",6)),
149   fHw6202((Hw6202_t*) herwig6_common_block_address_((char*)"HW6202",6)),
150   fHw6203((Hw6203_t*) herwig6_common_block_address_((char*)"HW6203",6)),
151   fHw6300((Hw6300_t*) herwig6_common_block_address_((char*)"HW6300",6)),
152   fHwpmrs((Hwpmrs_t*) herwig6_common_block_address_((char*)"HWPMRS",6)),
153   fHwcirc((Hwcirc_t*) herwig6_common_block_address_((char*)"HWCIRC",6)),
154   fHwdspb((Hwdspb_t*) herwig6_common_block_address_((char*)"HWDSPB",6)),
155   fHwdsp2((Hwdsp2_t*) herwig6_common_block_address_((char*)"HWDSP2",6)),
156   fHwdsp3((Hwdsp3_t*) herwig6_common_block_address_((char*)"HWDSP3",6)),
157   fHwdsp4((Hwdsp4_t*) herwig6_common_block_address_((char*)"HWDSP4",6)),
158   fHwdspn((Hwdspn_t*) herwig6_common_block_address_((char*)"HWDSPN",6)),
159   fHwspin((Hwspin_t*) herwig6_common_block_address_((char*)"HWSPIN",6)),
160   fHwstau((Hwstau_t*) herwig6_common_block_address_((char*)"HWSTAU",6)),
161   fHwgupr((Hwgupr_t*) herwig6_common_block_address_((char*)"HWGUPR",6)),
162   fHw6500((Hw6500_t*) herwig6_common_block_address_((char*)"HW6500",6)),
163   fHw6504((Hw6504_t*) herwig6_common_block_address_((char*)"HW6504",6)),
164   fHw6506((Hw6506_t*) herwig6_common_block_address_((char*)"HW6506",6))
165 {
166     Fatal("THerwig6","Copy constructor not implemented yet");
167 }
168 //------------------------------------------------------------------------------
169  THerwig6::~THerwig6()
170  {
171    // Destructor. The data members of TGenerator are delete by itself
172  }
173
174 //______________________________________________________________________________
175 void THerwig6::GenerateEvent() 
176 {
177   
178   //initialize event
179   hwuine_();
180   // generate hard subprocess
181   hwepro_();
182   // generate parton cascades
183   hwbgen_();
184   // do heavy objects decay
185   hwdhob_();
186   // do cluster formation
187   hwcfor_();
188   // do cluster decays
189   hwcdec_();
190   // do unstable particle decays
191   hwdhad_();
192   // do heavy flavor hadrons decay
193   hwdhvy_();
194   // add soft underlying event
195   hwmevt_();
196   // finish event
197   hwufne_();
198 }
199
200 //______________________________________________________________________________
201 void THerwig6::OpenFortranFile(int lun, char* name) {
202   herwig6_open_fortran_file_(&lun, name, strlen(name));
203 }
204
205 //______________________________________________________________________________
206 void THerwig6::CloseFortranFile(int lun) {
207   herwig6_close_fortran_file_(&lun);
208 }
209
210 void THerwig6::Initialize(const char *beam, const char *target, double pbeam1, double pbeam2, int iproc)
211
212 {
213   // perform the initialization for Herwig6
214   // sets correct title. 
215   // after calling this method all parameters are set to their default
216   // values. If you want to modify any parameter you have to set the new
217   // value after calling Initialize and before PrepareRun.
218
219    char  cbeam[8];
220    strncpy(cbeam,beam,8);
221    char  ctarget[8];
222    strncpy(ctarget,target,8);
223    printf("\n Initializing Herwig !! \n");
224    if ( (!strncmp(beam, "E+"    ,2)) &&
225         (!strncmp(beam, "E-"    ,2)) &&
226         (!strncmp(beam, "MU+"   ,3)) &&
227         (!strncmp(beam, "MU-"   ,3)) &&
228         (!strncmp(beam, "NUE"   ,3)) &&
229         (!strncmp(beam, "NUEB"  ,4)) &&
230         (!strncmp(beam, "NUMU"  ,4)) &&
231         (!strncmp(beam, "NMUB"  ,4)) &&
232         (!strncmp(beam, "NTAU"  ,4)) &&
233         (!strncmp(beam, "NTAB"  ,4)) &&
234         (!strncmp(beam, "GAMA"  ,4)) &&
235         (!strncmp(beam, "P       ",8)) &&
236         (!strncmp(beam, "PBAR    ",8)) &&
237         (!strncmp(beam, "N"     ,1)) &&
238         (!strncmp(beam, "NBAR"  ,4)) &&
239         (!strncmp(beam, "PI+"   ,3)) &&
240         (!strncmp(beam, "PI-"   ,3)) ) {
241       printf("WARNING! In THerwig6:Initialize():\n");
242       printf(" specified beam=%s is unrecognized .\n",beam);
243       printf(" resetting to \"P\" .");
244       sprintf(cbeam,"P");
245    }
246
247    if ( (!strncmp(target, "E+"    ,2)) &&
248         (!strncmp(target, "E-"    ,2)) &&
249         (!strncmp(target, "MU+"   ,3)) &&
250         (!strncmp(target, "MU-"   ,3)) &&
251         (!strncmp(target, "NUE"   ,3)) &&
252         (!strncmp(target, "NUEB"  ,4)) &&
253         (!strncmp(target, "NUMU"  ,4)) &&
254         (!strncmp(target, "NMUB"  ,4)) &&
255         (!strncmp(target, "NTAU"  ,4)) &&
256         (!strncmp(target, "NTAB"  ,4)) &&
257         (!strncmp(target, "GAMA"  ,4)) &&
258         (!strncmp(target, "P       ",8)) &&
259         (!strncmp(target, "PBAR    ",8)) &&
260         (!strncmp(target, "N"     ,1)) &&
261         (!strncmp(target, "NBAR"  ,4)) &&
262         (!strncmp(target, "PI+"   ,3)) &&
263         (!strncmp(target, "PI-"   ,3)) ) {
264       printf("WARNING! In THerwig6:Initialize():\n");
265       printf(" specified target=%s is unrecognized .\n",target);
266       printf(" resetting to \"P\" .");
267       sprintf(ctarget,"P");
268    }
269
270    // initialization:
271    // type of beams
272    strncpy(fHwbmch->PART1,beam,8);
273    strncpy(fHwbmch->PART2,target,8);
274    // momentum of beams
275    fHwproc->PBEAM1=pbeam1;
276    fHwproc->PBEAM2=pbeam2;
277    // process to generate
278    fHwproc->IPROC=iproc;
279    // not used in the class definition 
280    fHwproc->MAXEV=1;
281
282    // reset all parameters
283    hwigin_();
284    
285    // set correct title
286    char atitle[132];
287    double win=pbeam1+pbeam2;
288    printf("\n %s - %s at %g GeV",beam,target,win);
289    sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win);
290    SetTitle(atitle); 
291 }
292
293 void THerwig6::PrepareRun()
294 {
295   // compute parameter dependent constants
296   hwuinc_();
297   // initialize elementary processes
298   hweini_();
299 }
300
301 //______________________________________________________________________________
302 TObjArray* THerwig6::ImportParticles(Option_t *option)
303 {
304 //
305 //  Default primary creation method. It reads the /HEPEVT/ common block which
306 //  has been filled by the GenerateEvent method. If the event generator does
307 //  not use the HEPEVT common block, This routine has to be overloaded by
308 //  the subclasses.
309 //  The default action is to store only the stable particles (ISTHEP = 1)
310 //  This can be demanded explicitly by setting the option = "Final"
311 //  If the option = "All", all the particles are stored.
312 //
313   fParticles->Clear();
314   Int_t numpart = fHepevt->NHEP;
315   TClonesArray &a = *((TClonesArray*)fParticles);
316   if (!strcmp(option,"") || !strcmp(option,"Final")) {
317     for (Int_t i = 0; i<=numpart; i++) {
318       if (fHepevt->ISTHEP[i] == 1) {
319 //
320 //  Use the common block values for the TParticle constructor
321 //
322         new(a[i]) TParticle(
323                                    fHepevt->IDHEP[i],
324                                    fHepevt->ISTHEP[i],
325                                    fHepevt->JMOHEP[i][0]-1,
326                                    fHepevt->JMOHEP[i][1]-1,
327                                    fHepevt->JDAHEP[i][0]-1,
328                                    fHepevt->JDAHEP[i][1]-1,
329
330                                    fHepevt->PHEP[i][0],
331                                    fHepevt->PHEP[i][1],
332                                    fHepevt->PHEP[i][2],
333                                    fHepevt->PHEP[i][3],
334                                    fHepevt->VHEP[i][0],
335                                    fHepevt->VHEP[i][1],
336                                    fHepevt->VHEP[i][2],
337                                    fHepevt->VHEP[i][3]);
338         }
339      }
340   }
341   else if (!strcmp(option,"All")) {
342     for (Int_t i = 0; i<=numpart; i++) {
343       new(a[i]) TParticle(
344                                    fHepevt->IDHEP[i],
345                                    fHepevt->ISTHEP[i],
346                                    fHepevt->JMOHEP[i][0]-1,
347                                    fHepevt->JMOHEP[i][1]-1,
348                                    fHepevt->JDAHEP[i][0]-1,
349                                    fHepevt->JDAHEP[i][1]-1,
350
351                                    fHepevt->PHEP[i][0],
352                                    fHepevt->PHEP[i][1],
353                                    fHepevt->PHEP[i][2],
354                                    fHepevt->PHEP[i][3],
355                                    fHepevt->VHEP[i][0],
356                                    fHepevt->VHEP[i][1],
357                                    fHepevt->VHEP[i][2],
358                                    fHepevt->VHEP[i][3]);
359     }
360   }
361   return fParticles;
362 }
363
364 //______________________________________________________________________________
365 Int_t THerwig6::ImportParticles(TClonesArray *particles, Option_t *option)
366 {
367 //
368 //  Default primary creation method. It reads the /HEPEVT/ common block which
369 //  has been filled by the GenerateEvent method. If the event generator does
370 //  not use the HEPEVT common block, This routine has to be overloaded by
371 //  the subclasses.
372 //  The function loops on the generated particles and store them in
373 //  the TClonesArray pointed by the argument particles.
374 //  The default action is to store only the stable particles (ISTHEP = 1)
375 //  This can be demanded explicitly by setting the option = "Final"
376 //  If the option = "All", all the particles are stored.
377 //
378   if (particles == 0) return 0;
379   TClonesArray &refParticles = *particles;
380   refParticles.Clear();
381   Int_t numpart = fHepevt->NHEP;
382   if (!strcmp(option,"") || !strcmp(option,"Final")) {
383     for (Int_t i = 0; i< numpart; i++) {
384       if (fHepevt->ISTHEP[i] == 1) {
385 //
386 //  Use the common block values for the TParticle constructor
387 //
388         new(refParticles[i]) TParticle(
389                                    fHepevt->IDHEP[i],
390                                    fHepevt->ISTHEP[i],
391                                    fHepevt->JMOHEP[i][0]-1,
392                                    fHepevt->JMOHEP[i][1]-1,
393                                    fHepevt->JDAHEP[i][0]-1,
394                                    fHepevt->JDAHEP[i][1]-1,
395
396                                    fHepevt->PHEP[i][0],
397                                    fHepevt->PHEP[i][1],
398                                    fHepevt->PHEP[i][2],
399                                    fHepevt->PHEP[i][3],
400                                    fHepevt->VHEP[i][0],
401                                    fHepevt->VHEP[i][1],
402                                    fHepevt->VHEP[i][2],
403                                    fHepevt->VHEP[i][3]);
404         }
405      }
406   }
407   else if (!strcmp(option,"All")) {
408     for (Int_t i = 0; i< numpart; i++) {
409       new(refParticles[i]) TParticle(
410                                    fHepevt->IDHEP[i],
411                                    fHepevt->ISTHEP[i],
412                                    fHepevt->JMOHEP[i][0]-1,
413                                    fHepevt->JMOHEP[i][1]-1,
414                                    fHepevt->JDAHEP[i][0]-1,
415                                    fHepevt->JDAHEP[i][1]-1,
416
417                                    fHepevt->PHEP[i][0],
418                                    fHepevt->PHEP[i][1],
419                                    fHepevt->PHEP[i][2],
420                                    fHepevt->PHEP[i][3],
421                                    fHepevt->VHEP[i][0],
422                                    fHepevt->VHEP[i][1],
423                                    fHepevt->VHEP[i][2],
424                                    fHepevt->VHEP[i][3]);
425     }
426   }
427   return numpart;
428 }
429
430 void THerwig6::Hwigin()
431 {
432   hwigin_();
433 }
434
435 void THerwig6::Hwuinc()
436 {
437   hwuinc_();
438 }
439
440 void THerwig6::Hwusta(char* name)
441
442 {
443   hwusta_(name,8);
444 }
445
446 void THerwig6::Hweini()
447
448 {
449   hweini_();
450 }
451
452 void THerwig6::Hwuine()
453
454 {
455   hwuine_();
456 }
457
458 void THerwig6::Hwepro()
459
460 {
461   hwepro_();
462 }
463
464 void THerwig6::Hwbgen()
465
466 {
467   hwbgen_();
468 }
469
470 void THerwig6::Hwdhob()
471
472 {
473   hwdhob_();
474 }
475
476 void THerwig6::Hwcfor()
477
478 {
479   hwcfor_();
480 }
481
482 void THerwig6::Hwcdec()
483
484 {
485   hwcdec_();
486 }
487
488 void THerwig6::Hwdhad()
489
490 {
491   hwdhad_();
492 }
493
494 void THerwig6::Hwdhvy()
495
496 {
497   hwdhvy_();
498 }
499
500 void THerwig6::Hwmevt()
501
502 {
503   hwmevt_();
504 }
505
506 void THerwig6::Hwufne()
507
508 {
509   hwufne_();
510 }
511
512 void THerwig6::Hwefin()
513
514 {
515   hwefin_();
516 }
517
518 void THerwig6::Hwiodk(int iopt)
519
520 {
521   hwiodk_(iopt);
522 }
523
524 void THerwig6::SetupTest()
525 {
526   // exampe of running herwig and generating one event
527   // after changing some options
528   Initialize("P","PBAR",900.,900.,1500);
529   // here you can set some parameters
530   SetPTMIN(15.); // Min pt in hadronic jet production
531   SetYJMIN(-4.); // Min jet rapidity
532   SetYJMAX(4.);  // Max jet rapidity
533   // after you set your wished parameters
534   // herwig can do its work
535   PrepareRun();
536   int nEvToGenerate=1;
537   for (int i=0;i<nEvToGenerate;i++)
538     {
539       GenerateEvent();
540       // do your stuff. For ex:
541       int nOfPar=GetNumberOfParticles(); // from TGenerator
542       for (int j=0; j<nOfPar; j++)
543         {
544           TParticle* p=GetParticle(j);
545           // here you do whatever you want with the particle
546           p->Print();
547         };
548     };
549 }
550
551
552
553
554