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Reference Guide
TGenerator.cxx
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1// @(#)root/eg:$Id$
2// Author: Ola Nordmann 21/09/95
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12/** \class TGenerator
13 \ingroup eg
14
15The interface to various event generators
16
17Is an base class, that defines the interface of ROOT to various
18event generators. Every event generator should inherit from
19TGenerator or its subclasses.
20
21Derived class can overload the member function GenerateEvent
22to do the actual event generation (e.g., call PYEVNT or similar).
23
24The derived class should overload the member function
25ImportParticles (both types) to read the internal storage of the
26generated event into either the internal TObjArray or the passed
27TClonesArray of TParticles.
28
29If the generator code stores event data in the /HEPEVT/ common block
30Then the default implementation of ImportParticles should suffice.
31The common block /HEPEVT/ is structed like
32
33\verbatim
34 // C
35 typedef struct {
36 Int_t nevhep; // Event number
37 Int_t nhep; // # of particles
38 Int_t isthep[4000]; // Status flag of i'th particle
39 Int_t idhep[4000]; // PDG # of particle
40 Int_t jmohep[4000][2]; // 1st & 2nd mother particle #
41 Int_t jdahep[4000][2]; // 1st & 2nd daughter particle #
42 Double_t phep[4000][5]; // 4-momentum and 1 word
43 Double_t vhep[4000][4]; // 4-position of production
44 } HEPEVT_DEF;
45
46
47 C Fortran
48 COMMON/HEPEVT/NEVHEP,NHEP,ISTHEP(4000),IDHEP(4000),
49 + JMOHEP(2,4000),JDAHEP(2,4000),PHEP(5,4000),VHEP(4,4000)
50 INTEGER NEVHEP,NHEP,ISTHEP,IDHEP,JMOHEP,JDAHEP
51 DOUBLE PRECISION PHEP,VHEP
52\endverbatim
53
54The generic member functions SetParameter and GetParameter can be
55overloaded to set and get parameters of the event generator.
56
57Note, if the derived class interfaces a (set of) Fortran common
58blocks (like TPythia, TVenus does), one better make the derived
59class a singleton. That is, something like
60
61\verbatim
62 class MyGenerator : public TGenerator
63 {
64 public:
65 static MyGenerator* Instance()
66 {
67 if (!fgInstance) fgInstance = new MyGenerator;
68 return fgInstance;
69 }
70 void GenerateEvent() { ... }
71 void ImportParticles(TClonesArray* a, Option_t opt="") {...}
72 Int_t ImportParticles(Option_t opt="") { ... }
73 Int_t SetParameter(const char* name, Double_t val) { ... }
74 Double_t GetParameter(const char* name) { ... }
75 virtual ~MyGenerator() { ... }
76 protected:
77 MyGenerator() { ... }
78 MyGenerator(const MyGenerator& o) { ... }
79 MyGenerator& operator=(const MyGenerator& o) { ... }
80 static MyGenerator* fgInstance;
81 ClassDef(MyGenerator,0);
82 };
83\endverbatim
84
85Having multiple objects accessing the same common blocks is not
86safe.
87
88Concrete TGenerator classes can be loaded in scripts and subseqent-
89ly used in compiled code:
90
91\verbatim
92 // MyRun.h
93 class MyRun : public TObject
94 {
95 public:
96 static MyRun* Instance() { ... }
97 void SetGenerator(TGenerator* g) { fGenerator = g; }
98 void Run(Int_t n, Option_t* option="")
99 {
100 TFile* file = TFile::Open("file.root","RECREATE");
101 TTree* tree = new TTree("T","T");
102 TClonesArray* p = new TClonesArray("TParticles");
103 tree->Branch("particles", &p);
104 for (Int_t event = 0; event < n; event++) {
105 fGenerator->GenerateEvent();
106 fGenerator->ImportParticles(p,option);
107 tree->Fill();
108 }
109 file->Write();
110 file->Close();
111 }
112 ...
113 protected:
114 TGenerator* fGenerator;
115 ClassDef(MyRun,0);
116 };
117
118 // Config.C
119 void Config()
120 {
121 MyRun* run = MyRun::Instance();
122 run->SetGenerator(MyGenerator::Instance());
123 }
124
125 // main.cxx
126 int
127 main(int argc, char** argv)
128 {
129 TApplication app("", 0, 0);
130 gSystem->ProcessLine(".x Config.C");
131 MyRun::Instance()->Run(10);
132 return 0;
133 }
134\endverbatim
135
136This is especially useful for example with TVirtualMC or similar.
137*/
138
139#include "TROOT.h"
140#include "TGenerator.h"
141#include "TDatabasePDG.h"
142#include "TParticlePDG.h"
143#include "TParticle.h"
144#include "TObjArray.h"
145#include "Hepevt.h"
146#include "TVirtualPad.h"
147#include "TView.h"
148#include "TText.h"
149#include "TPaveText.h"
150#include "TClonesArray.h"
151#include "Riostream.h"
152
153
154ClassImp(TGenerator);
155
156////////////////////////////////////////////////////////////////////////////////
157/// Event generator default constructor
158///
159
160TGenerator::TGenerator(const char *name,const char *title): TNamed(name,title)
161{
162 // Initialize particles table
163 TDatabasePDG::Instance();
164 //TDatabasePDG *pdg = TDatabasePDG::Instance();
165 //if (!pdg->ParticleList()) pdg->Init();
166
167 fPtCut = 0;
168 fShowNeutrons = kTRUE;
169 fParticles = new TObjArray(10000);
170}
171
172////////////////////////////////////////////////////////////////////////////////
173/// Event generator default destructor
174///
175
176TGenerator::~TGenerator()
177{
178 //do nothing
179 if (fParticles) {
180 fParticles->Delete();
181 delete fParticles;
182 fParticles = 0;
183 }
184}
185
186////////////////////////////////////////////////////////////////////////////////
187/// must be implemented in concrete class (see eg TPythia6)
188
189void TGenerator::GenerateEvent()
190{
191}
192
193////////////////////////////////////////////////////////////////////////////////
194///
195/// It reads the /HEPEVT/ common block which has been filled by the
196/// GenerateEvent method. If the event generator does not use the
197/// HEPEVT common block, This routine has to be overloaded by the
198/// subclasses.
199///
200/// The default action is to store only the stable particles (ISTHEP =
201/// 1) This can be demanded explicitly by setting the option = "Final"
202/// If the option = "All", all the particles are stored.
203///
204
205TObjArray* TGenerator::ImportParticles(Option_t *option)
206{
207 fParticles->Clear();
208 Int_t numpart = HEPEVT.nhep;
209 if (!strcmp(option,"") || !strcmp(option,"Final")) {
210 for (Int_t i = 0; i<numpart; i++) {
211 if (HEPEVT.isthep[i] == 1) {
212//
213// Use the common block values for the TParticle constructor
214//
215 TParticle *p = new TParticle(
216 HEPEVT.idhep[i],
217 HEPEVT.isthep[i],
218 HEPEVT.jmohep[i][0]-1,
219 HEPEVT.jmohep[i][1]-1,
220 HEPEVT.jdahep[i][0]-1,
221 HEPEVT.jdahep[i][1]-1,
222 HEPEVT.phep[i][0],
223 HEPEVT.phep[i][1],
224 HEPEVT.phep[i][2],
225 HEPEVT.phep[i][3],
226 HEPEVT.vhep[i][0],
227 HEPEVT.vhep[i][1],
228 HEPEVT.vhep[i][2],
229 HEPEVT.vhep[i][3]);
230 fParticles->Add(p);
231 }
232 }
233 } else if (!strcmp(option,"All")) {
234 for (Int_t i = 0; i<numpart; i++) {
235 TParticle *p = new TParticle(
236 HEPEVT.idhep[i],
237 HEPEVT.isthep[i],
238 HEPEVT.jmohep[i][0]-1,
239 HEPEVT.jmohep[i][1]-1,
240 HEPEVT.jdahep[i][0]-1,
241 HEPEVT.jdahep[i][1]-1,
242 HEPEVT.phep[i][0],
243 HEPEVT.phep[i][1],
244 HEPEVT.phep[i][2],
245 HEPEVT.phep[i][3],
246 HEPEVT.vhep[i][0],
247 HEPEVT.vhep[i][1],
248 HEPEVT.vhep[i][2],
249 HEPEVT.vhep[i][3]);
250 fParticles->Add(p);
251 }
252 }
253 return fParticles;
254}
255
256////////////////////////////////////////////////////////////////////////////////
257///
258/// It reads the /HEPEVT/ common block which has been filled by the
259/// GenerateEvent method. If the event generator does not use the
260/// HEPEVT common block, This routine has to be overloaded by the
261/// subclasses.
262///
263/// The function loops on the generated particles and store them in
264/// the TClonesArray pointed by the argument particles. The default
265/// action is to store only the stable particles (ISTHEP = 1) This can
266/// be demanded explicitly by setting the option = "Final" If the
267/// option = "All", all the particles are stored.
268///
269
270Int_t TGenerator::ImportParticles(TClonesArray *particles, Option_t *option)
271{
272 if (particles == 0) return 0;
273 TClonesArray &clonesParticles = *particles;
274 clonesParticles.Clear();
275 Int_t numpart = HEPEVT.nhep;
276 if (!strcmp(option,"") || !strcmp(option,"Final")) {
277 for (Int_t i = 0; i<numpart; i++) {
278 if (HEPEVT.isthep[i] == 1) {
279//
280// Use the common block values for the TParticle constructor
281//
282 new(clonesParticles[i]) TParticle(
283 HEPEVT.idhep[i],
284 HEPEVT.isthep[i],
285 HEPEVT.jmohep[i][0]-1,
286 HEPEVT.jmohep[i][1]-1,
287 HEPEVT.jdahep[i][0]-1,
288 HEPEVT.jdahep[i][1]-1,
289 HEPEVT.phep[i][0],
290 HEPEVT.phep[i][1],
291 HEPEVT.phep[i][2],
292 HEPEVT.phep[i][3],
293 HEPEVT.vhep[i][0],
294 HEPEVT.vhep[i][1],
295 HEPEVT.vhep[i][2],
296 HEPEVT.vhep[i][3]);
297 }
298 }
299 } else if (!strcmp(option,"All")) {
300 for (Int_t i = 0; i<numpart; i++) {
301 new(clonesParticles[i]) TParticle(
302 HEPEVT.idhep[i],
303 HEPEVT.isthep[i],
304 HEPEVT.jmohep[i][0]-1,
305 HEPEVT.jmohep[i][1]-1,
306 HEPEVT.jdahep[i][0]-1,
307 HEPEVT.jdahep[i][1]-1,
308 HEPEVT.phep[i][0],
309 HEPEVT.phep[i][1],
310 HEPEVT.phep[i][2],
311 HEPEVT.phep[i][3],
312 HEPEVT.vhep[i][0],
313 HEPEVT.vhep[i][1],
314 HEPEVT.vhep[i][2],
315 HEPEVT.vhep[i][3]);
316 }
317 }
318 return numpart;
319}
320
321////////////////////////////////////////////////////////////////////////////////
322///browse generator
323
324void TGenerator::Browse(TBrowser *)
325{
326 Draw();
327 gPad->Update();
328}
329
330////////////////////////////////////////////////////////////////////////////////
331/// Compute distance from point px,py to objects in event
332///
333
334Int_t TGenerator::DistancetoPrimitive(Int_t px, Int_t py)
335{
336 const Int_t big = 9999;
337 const Int_t inview = 0;
338 Int_t dist = big;
339 if (px > 50 && py > 50) dist = inview;
340 return dist;
341}
342
343////////////////////////////////////////////////////////////////////////////////
344///
345/// Insert one event in the pad list
346///
347
348void TGenerator::Draw(Option_t *option)
349{
350 // Create a default canvas if a canvas does not exist
351 if (!gPad) {
352 gROOT->MakeDefCanvas();
353 if (gPad->GetVirtCanvas())
354 gPad->GetVirtCanvas()->SetFillColor(13);
355 }
356
357 static Float_t rbox = 1000;
358 Float_t rmin[3],rmax[3];
359 TView *view = gPad->GetView();
360 if (!strstr(option,"same")) {
361 if (view) { view->GetRange(rmin,rmax); rbox = rmax[2];}
362 gPad->Clear();
363 }
364
365 AppendPad(option);
366
367 view = gPad->GetView();
368 // compute 3D view
369 if (view) {
370 view->GetRange(rmin,rmax);
371 rbox = rmax[2];
372 } else {
373 view = TView::CreateView(1,0,0);
374 if (view) view->SetRange(-rbox,-rbox,-rbox, rbox,rbox,rbox );
375 }
376 const Int_t kColorProton = 4;
377 const Int_t kColorNeutron = 5;
378 const Int_t kColorAntiProton= 3;
379 const Int_t kColorPionPlus = 6;
380 const Int_t kColorPionMinus = 2;
381 const Int_t kColorKaons = 7;
382 const Int_t kColorElectrons = 0;
383 const Int_t kColorGamma = 18;
384
385 Int_t nProtons = 0;
386 Int_t nNeutrons = 0;
387 Int_t nAntiProtons= 0;
388 Int_t nPionPlus = 0;
389 Int_t nPionMinus = 0;
390 Int_t nKaons = 0;
391 Int_t nElectrons = 0;
392 Int_t nGammas = 0;
393
394 Int_t ntracks = fParticles->GetEntriesFast();
395 Int_t i,lwidth,color,lstyle;
396 TParticlePDG *ap;
397 TParticle *p;
398 const char *name;
399 Double_t etot,vx,vy,vz;
400 Int_t ninvol = 0;
401 for (i=0;i<ntracks;i++) {
402 p = (TParticle*)fParticles->UncheckedAt(i);
403 if(!p) continue;
404 ap = (TParticlePDG*)p->GetPDG();
405 vx = p->Vx();
406 vy = p->Vy();
407 vz = p->Vz();
408 if (vx*vx+vy*vy+vz*vz > rbox*rbox) continue;
409 Float_t pt = p->Pt();
410 if (pt < fPtCut) continue;
411 etot = p->Energy();
412 if (etot > 0.1) lwidth = Int_t(6*TMath::Log10(etot));
413 else lwidth = 1;
414 if (lwidth < 1) lwidth = 1;
415 lstyle = 1;
416 color = 0;
417 name = ap->GetName();
418 if (!strcmp(name,"n")) { if (!fShowNeutrons) continue;
419 color = kColorNeutron; nNeutrons++;}
420 if (!strcmp(name,"p")) { color = kColorProton; nProtons++;}
421 if (!strcmp(name,"p bar")) { color = kColorAntiProton; nAntiProtons++;}
422 if (!strcmp(name,"pi+")) { color = kColorPionPlus; nPionPlus++;}
423 if (!strcmp(name,"pi-")) { color = kColorPionMinus; nPionMinus++;}
424 if (!strcmp(name,"e+")) { color = kColorElectrons; nElectrons++;}
425 if (!strcmp(name,"e-")) { color = kColorElectrons; nElectrons++;}
426 if (!strcmp(name,"gamma")) { color = kColorGamma; nGammas++; lstyle = 3; }
427 if ( strstr(name,"K")) { color = kColorKaons; nKaons++;}
428 p->SetLineColor(color);
429 p->SetLineStyle(lstyle);
430 p->SetLineWidth(lwidth);
431 p->AppendPad();
432 ninvol++;
433 }
434
435 // event title
436 TPaveText *pt = new TPaveText(-0.94,0.85,-0.25,0.98,"br");
437 pt->AddText((char*)GetName());
438 pt->AddText((char*)GetTitle());
439 pt->SetFillColor(42);
440 pt->Draw();
441
442 // Annotate color codes
443 Int_t tcolor = 5;
444 if (gPad->GetFillColor() == 10) tcolor = 4;
445 TText *text = new TText(-0.95,-0.47,"Particles");
446 text->SetTextAlign(12);
447 text->SetTextSize(0.025);
448 text->SetTextColor(tcolor);
449 text->Draw();
450 text->SetTextColor(kColorGamma); text->DrawText(-0.95,-0.52,"(on screen)");
451 text->SetTextColor(kColorGamma); text->DrawText(-0.95,-0.57,"Gamma");
452 text->SetTextColor(kColorProton); text->DrawText(-0.95,-0.62,"Proton");
453 text->SetTextColor(kColorNeutron); text->DrawText(-0.95,-0.67,"Neutron");
454 text->SetTextColor(kColorAntiProton); text->DrawText(-0.95,-0.72,"AntiProton");
455 text->SetTextColor(kColorPionPlus); text->DrawText(-0.95,-0.77,"Pion +");
456 text->SetTextColor(kColorPionMinus); text->DrawText(-0.95,-0.82,"Pion -");
457 text->SetTextColor(kColorKaons); text->DrawText(-0.95,-0.87,"Kaons");
458 text->SetTextColor(kColorElectrons); text->DrawText(-0.95,-0.92,"Electrons,etc.");
459
460 text->SetTextColor(tcolor);
461 text->SetTextAlign(32);
462 char tcount[32];
463 snprintf(tcount,12,"%d",ntracks); text->DrawText(-0.55,-0.47,tcount);
464 snprintf(tcount,12,"%d",ninvol); text->DrawText(-0.55,-0.52,tcount);
465 snprintf(tcount,12,"%d",nGammas); text->DrawText(-0.55,-0.57,tcount);
466 snprintf(tcount,12,"%d",nProtons); text->DrawText(-0.55,-0.62,tcount);
467 snprintf(tcount,12,"%d",nNeutrons); text->DrawText(-0.55,-0.67,tcount);
468 snprintf(tcount,12,"%d",nAntiProtons); text->DrawText(-0.55,-0.72,tcount);
469 snprintf(tcount,12,"%d",nPionPlus); text->DrawText(-0.55,-0.77,tcount);
470 snprintf(tcount,12,"%d",nPionMinus); text->DrawText(-0.55,-0.82,tcount);
471 snprintf(tcount,12,"%d",nKaons); text->DrawText(-0.55,-0.87,tcount);
472 snprintf(tcount,12,"%d",nElectrons); text->DrawText(-0.55,-0.92,tcount);
473
474 text->SetTextAlign(12);
475 if (nPionPlus+nPionMinus) {
476 snprintf(tcount,31,"Protons/Pions= %4f",Float_t(nProtons)/Float_t(nPionPlus+nPionMinus));
477 } else {
478 strlcpy(tcount,"Protons/Pions= inf",31);
479 }
480 text->DrawText(-0.45,-0.92,tcount);
481
482 if (nPionPlus+nPionMinus) {
483 snprintf(tcount,31,"Kaons/Pions= %4f",Float_t(nKaons)/Float_t(nPionPlus+nPionMinus));
484 } else {
485 strlcpy(tcount,"Kaons/Pions= inf",31);
486 }
487 text->DrawText(0.30,-0.92,tcount);
488}
489
490
491////////////////////////////////////////////////////////////////////////////////
492/// Execute action corresponding to one event
493///
494
495void TGenerator::ExecuteEvent(Int_t event, Int_t px, Int_t py)
496{
497 if (gPad->GetView()) {
498 gPad->GetView()->ExecuteRotateView(event, px, py);
499 return;
500 }
501}
502
503////////////////////////////////////////////////////////////////////////////////
504/// Return the number of particles in the stack
505
506Int_t TGenerator::GetNumberOfParticles() const
507{
508 return fParticles->GetLast()+1;
509}
510
511////////////////////////////////////////////////////////////////////////////////
512/// Returns pointer to primary number i;
513///
514
515TParticle *TGenerator::GetParticle(Int_t i) const
516{
517 if (!fParticles) return 0;
518 Int_t n = fParticles->GetLast();
519 if (i < 0 || i > n) return 0;
520 return (TParticle*)fParticles->UncheckedAt(i);
521}
522
523////////////////////////////////////////////////////////////////////////////////
524///
525/// Paint one event
526///
527
528void TGenerator::Paint(Option_t *)
529{
530}
531
532////////////////////////////////////////////////////////////////////////////////
533///
534/// Set Pt threshold below which primaries are not drawn
535///
536
537void TGenerator::SetPtCut(Float_t ptcut)
538{
539 fPtCut = ptcut;
540 Draw();
541 gPad->Update();
542}
543
544////////////////////////////////////////////////////////////////////////////////
545///
546/// Set lower and upper values of the view range
547///
548
549void TGenerator::SetViewRadius(Float_t rbox)
550{
551 SetViewRange(-rbox,-rbox,-rbox,rbox,rbox,rbox);
552}
553
554////////////////////////////////////////////////////////////////////////////////
555///
556/// Set lower and upper values of the view range
557///
558
559void TGenerator::SetViewRange(Float_t xmin, Float_t ymin, Float_t zmin, Float_t xmax, Float_t ymax, Float_t zmax)
560{
561 TView *view = gPad->GetView();
562 if (!view) return;
563 view->SetRange(xmin,ymin,zmin,xmax,ymax,zmax);
564
565 Draw();
566 gPad->Update();
567}
568
569////////////////////////////////////////////////////////////////////////////////
570///
571/// Set flag to display or not neutrons
572///
573
574void TGenerator::ShowNeutrons(Bool_t show)
575{
576 fShowNeutrons = show;
577 Draw();
578 gPad->Update();
579}
HEPEVT
HEPEVT_DEF HEPEVT
Definition: Hepevt.h:36
Int_t
int Int_t
Definition: RtypesCore.h:41
Bool_t
bool Bool_t
Definition: RtypesCore.h:59
Double_t
double Double_t
Definition: RtypesCore.h:55
Float_t
float Float_t
Definition: RtypesCore.h:53
kTRUE
const Bool_t kTRUE
Definition: RtypesCore.h:87
Option_t
const char Option_t
Definition: RtypesCore.h:62
ClassImp
#define ClassImp(name)
Definition: Rtypes.h:365
name
char name[80]
Definition: TGX11.cxx:109
xmin
float xmin
Definition: THbookFile.cxx:93
ymin
float ymin
Definition: THbookFile.cxx:93
xmax
float xmax
Definition: THbookFile.cxx:93
ymax
float ymax
Definition: THbookFile.cxx:93
gROOT
#define gROOT
Definition: TROOT.h:414
gPad
#define gPad
Definition: TVirtualPad.h:286
snprintf
#define snprintf
Definition: civetweb.c:1540
TAttFill::SetFillColor
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
TAttLine::SetLineStyle
virtual void SetLineStyle(Style_t lstyle)
Set the line style.
Definition: TAttLine.h:42
TAttLine::SetLineWidth
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
Definition: TAttLine.h:43
TAttLine::SetLineColor
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40
TAttText::SetTextAlign
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:41
TAttText::SetTextColor
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition: TAttText.h:43
TAttText::SetTextSize
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition: TAttText.h:46
TBrowser
Using a TBrowser one can browse all ROOT objects.
Definition: TBrowser.h:37
TClonesArray
An array of clone (identical) objects.
Definition: TClonesArray.h:32
TClonesArray::Clear
virtual void Clear(Option_t *option="")
Clear the clones array.
Definition: TClonesArray.cxx:407
TDatabasePDG::Instance
static TDatabasePDG * Instance()
static function
Definition: TDatabasePDG.cxx:106
TGenerator
The interface to various event generators.
Definition: TGenerator.h:144
TGenerator::GetParticle
virtual TParticle * GetParticle(Int_t i) const
Returns pointer to primary number i;.
Definition: TGenerator.cxx:515
TGenerator::GetNumberOfParticles
Int_t GetNumberOfParticles() const
Return the number of particles in the stack.
Definition: TGenerator.cxx:506
TGenerator::SetViewRadius
virtual void SetViewRadius(Float_t rbox=1000)
Set lower and upper values of the view range.
Definition: TGenerator.cxx:549
TGenerator::ExecuteEvent
virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py)
Execute action corresponding to one event.
Definition: TGenerator.cxx:495
TGenerator::Paint
virtual void Paint(Option_t *option="")
Paint one event.
Definition: TGenerator.cxx:528
TGenerator::~TGenerator
virtual ~TGenerator()
Event generator default destructor.
Definition: TGenerator.cxx:176
TGenerator::GenerateEvent
virtual void GenerateEvent()
must be implemented in concrete class (see eg TPythia6)
Definition: TGenerator.cxx:189
TGenerator::fShowNeutrons
Bool_t fShowNeutrons
Pt cut. Do not show primaries below.
Definition: TGenerator.h:148
TGenerator::ImportParticles
virtual Int_t ImportParticles(TClonesArray *particles, Option_t *option="")
It reads the /HEPEVT/ common block which has been filled by the GenerateEvent method.
Definition: TGenerator.cxx:270
TGenerator::SetPtCut
virtual void SetPtCut(Float_t ptcut=0)
Set Pt threshold below which primaries are not drawn.
Definition: TGenerator.cxx:537
TGenerator::fParticles
TObjArray * fParticles
display neutrons if true
Definition: TGenerator.h:149
TGenerator::fPtCut
Float_t fPtCut
Definition: TGenerator.h:147
TGenerator::DistancetoPrimitive
virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
Compute distance from point px,py to objects in event.
Definition: TGenerator.cxx:334
TGenerator::Draw
virtual void Draw(Option_t *option="")
Insert one event in the pad list.
Definition: TGenerator.cxx:348
TGenerator::Browse
virtual void Browse(TBrowser *b)
browse generator
Definition: TGenerator.cxx:324
TGenerator::ShowNeutrons
virtual void ShowNeutrons(Bool_t show=1)
Set flag to display or not neutrons.
Definition: TGenerator.cxx:574
TGenerator::SetViewRange
virtual void SetViewRange(Float_t xmin=-10000, Float_t ymin=-10000, Float_t zmin=-10000, Float_t xmax=10000, Float_t ymax=10000, Float_t zmax=10000)
Set lower and upper values of the view range.
Definition: TGenerator.cxx:559
TNamed
The TNamed class is the base class for all named ROOT classes.
Definition: TNamed.h:29
TNamed::GetTitle
virtual const char * GetTitle() const
Returns title of object.
Definition: TNamed.h:48
TNamed::GetName
virtual const char * GetName() const
Returns name of object.
Definition: TNamed.h:47
TObjArray
An array of TObjects.
Definition: TObjArray.h:37
TObjArray::GetEntriesFast
Int_t GetEntriesFast() const
Definition: TObjArray.h:64
TObjArray::Add
void Add(TObject *obj)
Definition: TObjArray.h:74
TObjArray::Clear
virtual void Clear(Option_t *option="")
Remove all objects from the array.
Definition: TObjArray.cxx:320
TObjArray::UncheckedAt
TObject * UncheckedAt(Int_t i) const
Definition: TObjArray.h:90
TObjArray::Delete
virtual void Delete(Option_t *option="")
Remove all objects from the array AND delete all heap based objects.
Definition: TObjArray.cxx:355
TObjArray::GetLast
Int_t GetLast() const
Return index of last object in array.
Definition: TObjArray.cxx:576
TObject::AppendPad
virtual void AppendPad(Option_t *option="")
Append graphics object to current pad.
Definition: TObject.cxx:105
TObject::Draw
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:195
TParticlePDG
Description of the static properties of a particle.
Definition: TParticlePDG.h:19
TParticle
Description of the dynamic properties of a particle.
Definition: TParticle.h:26
TParticle::Energy
Double_t Energy() const
Definition: TParticle.h:136
TParticle::GetPDG
TParticlePDG * GetPDG(Int_t mode=0) const
Returns a pointer to the TParticlePDG object using the pdgcode.
Definition: TParticle.cxx:273
TParticle::Vy
Double_t Vy() const
Definition: TParticle.h:126
TParticle::Pt
Double_t Pt() const
Definition: TParticle.h:135
TParticle::Vx
Double_t Vx() const
Definition: TParticle.h:125
TParticle::Vz
Double_t Vz() const
Definition: TParticle.h:127
TPaveText
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
TPaveText::AddText
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:182
TPaveText::Draw
virtual void Draw(Option_t *option="")
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:233
TText
Base class for several text objects.
Definition: TText.h:23
TText::DrawText
virtual TText * DrawText(Double_t x, Double_t y, const char *text)
Draw this text with new coordinates.
Definition: TText.cxx:174
TView
See TView3D.
Definition: TView.h:25
TView::GetRange
virtual void GetRange(Float_t *min, Float_t *max)=0
TView::CreateView
static TView * CreateView(Int_t system=1, const Double_t *rmin=0, const Double_t *rmax=0)
Create a concrete default 3-d view via the plug-in manager.
Definition: TView.cxx:27
TView::SetRange
virtual void SetRange(const Double_t *min, const Double_t *max)=0
pt
TPaveText * pt
Definition: entrylist_figure1.C:7
text
TText * text
Definition: entrylist_figure1.C:10
n
const Int_t n
Definition: legend1.C:16
ROOT::Math::gv_detail::dist
double dist(Rotation3D const &r1, Rotation3D const &r2)
Definition: 3DDistances.cxx:48
TMath::Log10
Double_t Log10(Double_t x)
Definition: TMath.h:752
HEPEVT_DEF::jmohep
Int_t jmohep[4000][2]
Definition: Hepevt.h:26
HEPEVT_DEF::vhep
Double_t vhep[4000][4]
Definition: Hepevt.h:29
HEPEVT_DEF::isthep
Int_t isthep[4000]
Definition: Hepevt.h:24
HEPEVT_DEF::nhep
Int_t nhep
Definition: Hepevt.h:23
HEPEVT_DEF::phep
Double_t phep[4000][5]
Definition: Hepevt.h:28
HEPEVT_DEF::jdahep
Int_t jdahep[4000][2]
Definition: Hepevt.h:27
HEPEVT_DEF::idhep
Int_t idhep[4000]
Definition: Hepevt.h:25