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71352da6 | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
71352da6 | 17 | |
18 | ///////////////////////////////////////////////////////////////////////////// | |
19 | // | |
20 | // Contain parametrizations to generate atmospheric muons, and also | |
21 | // to generate single muons and muon bundles at surface level. | |
22 | // | |
23 | //Begin_Html | |
24 | /* | |
25 | <img src="picts/AliGenCRTClass.gif"> | |
26 | </pre> | |
27 | <br clear=left> | |
28 | <font size=+2 color=red> | |
29 | <p>The responsible person for this module is | |
30 | <a href="mailto:Enrique.Gamez.Flores@cern.ch">Enrique Gamez</a>. | |
31 | </font> | |
32 | <pre> | |
33 | */ | |
34 | //End_Html | |
35 | // | |
36 | ///////////////////////////////////////////////////////////////////////////// | |
37 | ||
fddb5247 | 38 | #include "AliGenCRT.h" |
39 | ||
116cbefd | 40 | #include <TMCProcess.h> |
41 | #include <TPDGCode.h> | |
bb5ce8b0 | 42 | #include <TClonesArray.h> |
43 | #include <TF1.h> | |
71352da6 | 44 | |
bb5ce8b0 | 45 | #include "AliRun.h" |
116cbefd | 46 | #include "AliConst.h" |
bb5ce8b0 | 47 | |
71352da6 | 48 | ClassImp(AliGenCRT) |
49 | ||
50 | //_____________________________________________________________________________ | |
bb5ce8b0 | 51 | AliGenCRT::AliGenCRT() |
52 | : AliGenerator(), | |
53 | fIpart(0), | |
54 | fCRMode(kSingleMuons), | |
55 | fCRModeName(0), | |
56 | fXwidth(0), | |
57 | fNx(1), | |
58 | fZwidth(0), | |
59 | fNz(1), | |
60 | fMuonGrid(kFALSE), | |
61 | fZenithMin(0), | |
62 | fZenithMax(0), | |
63 | fAzimuthMin(0), | |
64 | fAzimuthMax(0), | |
65 | fPRange(0), | |
66 | fPResolution(1), | |
67 | fAp(0), | |
68 | fMomentumDist(0), | |
69 | fUnfoldedMomentumDist(0), | |
70 | fZenithDist(0), | |
71 | fPDist(0) | |
71352da6 | 72 | { |
73 | // | |
74 | // Default ctor. | |
75 | // | |
71352da6 | 76 | } |
77 | ||
78 | //_____________________________________________________________________________ | |
79 | AliGenCRT::AliGenCRT(Int_t npart) | |
bb5ce8b0 | 80 | : AliGenerator(npart), |
81 | fIpart(kMuonMinus), | |
82 | fCRMode(kSingleMuons), | |
83 | fCRModeName(0), | |
84 | fXwidth(0), | |
85 | fNx(1), | |
86 | fZwidth(0), | |
87 | fNz(1), | |
88 | fMuonGrid(kFALSE), | |
89 | fZenithMin(0), | |
90 | fZenithMax(0), | |
91 | fAzimuthMin(0), | |
92 | fAzimuthMax(0), | |
93 | fPRange(0), | |
94 | fPResolution(1), | |
95 | fAp(0), | |
96 | fMomentumDist(0), | |
97 | fUnfoldedMomentumDist(0), | |
98 | fZenithDist(0), | |
99 | fPDist(0) | |
71352da6 | 100 | { |
101 | // | |
102 | // Standard ctor. | |
103 | // | |
104 | fName = "CRT"; | |
105 | fTitle = "Cosmic Muons generator"; | |
106 | ||
71352da6 | 107 | // Set the origin above the vertex, on the surface. |
108 | fOrigin[0] = 0.; | |
fddb5247 | 109 | fOrigin[1] = AliCRTConstants::Instance()->Depth(); // At the surface by default. |
71352da6 | 110 | fOrigin[2] = 0.; |
71352da6 | 111 | } |
112 | ||
113 | //_____________________________________________________________________________ | |
bb5ce8b0 | 114 | AliGenCRT::AliGenCRT(const AliGenCRT& gen) |
115 | : AliGenerator(gen) | |
71352da6 | 116 | { |
117 | // | |
bb5ce8b0 | 118 | // Copy constructor |
71352da6 | 119 | // |
120 | gen.Copy(*this); | |
121 | } | |
122 | ||
123 | //_____________________________________________________________________________ | |
bb5ce8b0 | 124 | AliGenCRT& AliGenCRT::operator=(const AliGenCRT& gen) |
71352da6 | 125 | { |
126 | // | |
bb5ce8b0 | 127 | // Asingment operator |
71352da6 | 128 | // |
129 | gen.Copy(*this); | |
130 | return *this; | |
131 | } | |
132 | ||
133 | //_____________________________________________________________________________ | |
134 | AliGenCRT::~AliGenCRT() | |
135 | { | |
136 | // | |
137 | // Default dtor. | |
138 | // | |
bb5ce8b0 | 139 | if ( fPDist ) {fPDist->Delete(); delete fPDist; fPDist = 0;} |
71352da6 | 140 | if ( fUnfoldedMomentumDist ) delete fUnfoldedMomentumDist; |
bb5ce8b0 | 141 | if ( fMomentumDist ) delete fMomentumDist; |
142 | if ( fAp ) delete fAp; | |
143 | if ( fCRModeName ) delete fCRModeName; | |
71352da6 | 144 | } |
145 | ||
146 | //_____________________________________________________________________________ | |
147 | void AliGenCRT::Generate() | |
148 | { | |
149 | // | |
150 | // Generate on one trigger | |
bb5ce8b0 | 151 | // Call the respective method inside the loop for the number |
152 | // of tracks per trigger. | |
71352da6 | 153 | |
bb5ce8b0 | 154 | for (Int_t i = 0; i < fNpart; i++ ) { |
71352da6 | 155 | |
bb5ce8b0 | 156 | if ( fCRMode == kMuonBundle ) { |
157 | this->GenerateOneMuonBundle(); | |
71352da6 | 158 | |
bb5ce8b0 | 159 | } else if ( fCRMode == kSingleMuons ) { |
160 | this->GenerateOneSingleMuon(kTRUE); | |
71352da6 | 161 | |
71352da6 | 162 | } else { |
bb5ce8b0 | 163 | // Generate only single muons but following the parametrizations |
164 | // for atmospheric muons. | |
165 | this->GenerateOneSingleMuon(); | |
71352da6 | 166 | |
71352da6 | 167 | } |
168 | ||
71352da6 | 169 | } |
71352da6 | 170 | } |
171 | ||
172 | //_____________________________________________________________________________ | |
173 | void AliGenCRT::Init() | |
174 | { | |
175 | // | |
176 | // Initialize some internal methods. | |
177 | // | |
178 | ||
179 | // Determine some specific data members. | |
180 | fPRange = TMath::Abs(fPMax-fPMin); | |
181 | ||
182 | if ( fCRMode == kSingleMuons ) { | |
183 | fCRModeName = new TString("Single Muons"); | |
184 | // Initialisation, check consistency of selected ranges | |
185 | if(TestBit(kPtRange)&&TestBit(kMomentumRange)) | |
186 | Fatal("Init","You should not set the momentum range and the pt range!"); | |
187 | ||
188 | if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange))) | |
189 | Fatal("Init","You should set either the momentum or the pt range!"); | |
190 | ||
191 | } else if ( fCRMode == kMuonBundle ) { | |
192 | fCRModeName = new TString("Muon Bundles"); | |
193 | ||
194 | } else if ( fCRMode == kMuonFlux ) { | |
195 | fCRModeName = new TString("Muon Fluxes"); | |
196 | // Initialize the ditribution functions. | |
197 | this->InitMomentumGeneration(); | |
198 | this->InitZenithalAngleGeneration(); | |
199 | ||
200 | } else { | |
201 | Fatal("Generate", "Generation Mode unknown!\n"); | |
202 | ||
203 | } | |
204 | ||
205 | } | |
206 | ||
bb5ce8b0 | 207 | //____________________________________________________________________________ |
208 | void AliGenCRT::GenerateOneSingleMuon(Bool_t withFlatMomentum) | |
209 | { | |
210 | // | |
211 | // Generate One Single Muon | |
212 | // This method will generate only one muon. | |
213 | // The momentum will be randomly flat distributed if | |
214 | // the paremeter "withFlatMomentum" is set to kTRUE, | |
215 | // otherwise the momentum will generate acordingly the parametrization | |
216 | // given by | |
217 | // and adpted from Bruno Alessandro's implementation with the | |
218 | // CERNLIB to AliRoot. | |
219 | // The "withFlatMomentum" parameter also will be used to generate | |
220 | // the muons with a flat Zenithal angle distribution. | |
221 | // Do the smearing here, so that means per track. | |
222 | ||
223 | Float_t polar[3]= {0,0,0}; // Polarization parameters | |
224 | Float_t origin[3]; | |
225 | Int_t nt; | |
226 | Float_t p[3]; | |
227 | Float_t pmom, pt; | |
228 | Float_t random[6]; | |
229 | ||
230 | // Take the azimuth random. | |
231 | Rndm(random, 2); | |
232 | Float_t azimuth = fAzimuthMin + (fAzimuthMax-fAzimuthMin)*random[0]; | |
233 | Float_t zenith = fZenithMin + (fZenithMax - fZenithMin)*random[1]; | |
234 | ||
235 | if ( withFlatMomentum ) { | |
236 | Rndm(random,3); | |
237 | if(TestBit(kMomentumRange)) { | |
238 | pmom = -( fPMin + random[0]*(fPMax - fPMin) ); // always downwards. | |
239 | pt = pmom*TMath::Sin(zenith*kDegrad); | |
240 | } else { | |
241 | pt = -( fPtMin + random[1]*(fPtMax - fPtMin)); // always downwards. | |
242 | pmom = pt/TMath::Sin(zenith*kDegrad); | |
243 | } | |
244 | ||
245 | } else { | |
246 | if ( fMomentumDist ) { | |
247 | pmom = -this->GetMomentum(); // Always downwards. | |
248 | } else { | |
249 | pmom = -fPMin; | |
250 | } | |
251 | zenith = this->GetZenithAngle(pmom); // In degrees | |
252 | pt = pmom*TMath::Sin(zenith*kDegrad); | |
253 | } | |
254 | ||
255 | p[0] = pt*TMath::Sin(azimuth*kDegrad); | |
256 | p[1] = pmom*TMath::Cos(zenith*kDegrad); | |
257 | p[2] = pt*TMath::Cos(azimuth*kDegrad); | |
258 | ||
259 | // Finaly the origin, with the smearing | |
260 | Rndm(random,6); | |
fddb5247 | 261 | origin[0] = AliCRTConstants::Instance()->Depth()*TMath::Tan(zenith*kDegrad)* |
bb5ce8b0 | 262 | TMath::Sin(azimuth*kDegrad); |
263 | // + fOsigma[0]* TMath::Cos(2*random[0]*TMath::Pi())*TMath::Sqrt(-2*TMath::Log(random[1])); | |
264 | ||
fddb5247 | 265 | origin[1] = AliCRTConstants::Instance()->Depth(); |
bb5ce8b0 | 266 | |
fddb5247 | 267 | origin[2] = AliCRTConstants::Instance()->Depth()*TMath::Tan(zenith*kDegrad)* |
bb5ce8b0 | 268 | TMath::Cos(azimuth*kDegrad); |
269 | // + fOsigma[2]* TMath::Cos(2*random[2]*TMath::Pi())*TMath::Sqrt(-2*TMath::Log(random[3]));; | |
270 | ||
271 | // Put the track on the stack. | |
272 | PushTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt); | |
273 | ||
274 | } | |
275 | ||
276 | //____________________________________________________________________________ | |
277 | void AliGenCRT::GenerateOneMuonBundle() | |
278 | { | |
279 | // | |
280 | // Generate One Muon Bundle method | |
281 | // This method will generate a bunch of muons following the | |
282 | // procedure of the AliGenScan class. | |
283 | // These muons will be generated with flat momentum. | |
284 | ||
285 | Float_t polar[3]= {0,0,0}; // Polarization parameters | |
286 | Float_t origin[3]; | |
287 | Float_t p[3]; | |
288 | Int_t nt; | |
289 | Float_t pmom; | |
290 | Float_t random[6]; | |
291 | ||
292 | Rndm(random, 3); | |
293 | //Float_t zenith = fZenithMin + (fZenithMax - fZenithMin)*random[1]; | |
294 | //Float_t azimuth = fAzimuthMin + (fAzimuthMax-fAzimuthMin)*random[2]; | |
295 | Float_t zenith = 10; | |
296 | Float_t azimuth = 30; | |
297 | ||
298 | // Generate the kinematics a la AliGenScan (Andreas Morchs) | |
299 | Float_t dx, dz; | |
300 | if ( fNx > 0 ) { | |
301 | dx = fXwidth/fNx; | |
302 | } else { | |
303 | dx = 1e10; | |
304 | //dx = 100.; | |
305 | } | |
306 | ||
307 | if ( fNz > 0 ) { | |
308 | dz = fZwidth/fNz; | |
309 | } else { | |
310 | dz = 1e10; | |
311 | //dz = 100.; | |
312 | } | |
313 | ||
314 | //origin[0] = AliCRTConstants::fgDepth*TMath::Tan(zenith*kDegrad)* | |
315 | origin[0] = 0.; | |
316 | //TMath::Sin(azimuth*kDegrad); | |
317 | //origin[1] = AliCRTConstants::fgDepth; | |
318 | origin[1] = 900; | |
319 | //origin[2] = AliCRTConstants::fgDepth*TMath::Tan(zenith*kDegrad)* | |
320 | origin[2] = 0.; | |
321 | //TMath::Cos(azimuth*kDegrad); | |
322 | ||
323 | for (Int_t ix = 0; ix < fNx; ix++ ) { | |
324 | for (Int_t iz = 0; iz < fNz; iz++ ) { | |
325 | Rndm(random,6); | |
326 | origin[0]+=ix*dx+2*(random[1]-0.5)*fOsigma[0]; | |
327 | origin[2]+=iz*dz+2*(random[2]-0.5)*fOsigma[2]; | |
328 | if ( random[4] < 0.5 ) { | |
329 | origin[0] = -1*origin[0]; | |
330 | } | |
331 | if ( random[5] < 0.5 ) { | |
332 | origin[2] = -1*origin[2]; | |
333 | } | |
334 | ||
335 | pmom = -(fPMin + random[3] *(fPMax - fPMax) ); // Always downwards | |
336 | p[0] = TMath::Sin(zenith*kDegrad)*TMath::Sin(azimuth*kDegrad)*pmom; | |
337 | p[1] = TMath::Cos(zenith*kDegrad)*pmom; | |
338 | p[2] = TMath::Sin(zenith*kDegrad)*TMath::Cos(azimuth*kDegrad)*pmom; | |
339 | ||
340 | PushTrack(fTrackIt, -1, fIpart, p, origin, polar, 0, kPPrimary, nt); | |
341 | } | |
342 | ||
343 | } | |
344 | ||
345 | } | |
346 | ||
71352da6 | 347 | //____________________________________________________________________________ |
348 | void AliGenCRT::SetGridRange(Int_t nx,Float_t xwidth, Int_t nz, Float_t zwidth) | |
349 | { | |
350 | // | |
351 | // Define the grid | |
352 | // This data shuold be used for Muon bundles generation. | |
353 | // | |
354 | fXwidth=xwidth; | |
355 | fNx=nx; | |
356 | fZwidth=zwidth; | |
357 | fNz=nz; | |
358 | ||
359 | // Print a message about the use, if the Mode has not been set, or | |
360 | // it has to a different Mode. | |
361 | if ( fCRMode != kMuonBundle ) { | |
362 | Warning("SetRange","You have been specified a grid to generate muon bundles, but seems that you haven't choose this generation mode, or you have already select a different one"); | |
363 | fMuonGrid = kTRUE; | |
364 | } | |
365 | } | |
366 | ||
367 | //____________________________________________________________________________ | |
368 | void AliGenCRT::InitApWeightFactors() | |
369 | { | |
370 | // | |
371 | // This factors will be to correct the zenithal angle distribution | |
372 | // acording the momentum | |
373 | ||
374 | // | |
375 | // Fill the array for the flux zenith angle dependence. | |
376 | // at the index 0 of fAp[] will be the "factor" if we have a muon | |
377 | // of 0 GeV. | |
378 | Float_t a[6] = {-1.61, -1.50, -1.28, -0.94, -0.61, -0.22}; | |
379 | Float_t p[6] = { 0., 10., 30., 100., 300., 1000.}; | |
380 | ||
381 | // Get the information from the momentum | |
382 | Int_t pEnd = TMath::Abs(TMath::Nint(fPMax/fPResolution)) + 1; | |
383 | // Initialize the Array of floats to hold the a(p) factors. | |
384 | fAp = new TArrayF(pEnd); | |
385 | ||
386 | Int_t index = 0; | |
387 | ||
388 | for (Int_t i = 0; i < pEnd; i++ ) { | |
389 | Float_t currentP = ((Float_t)i)*fPResolution; | |
390 | if ( currentP < p[1] ) index = 0; | |
391 | else if ( currentP >= p[1] && currentP < p[2] ) index = 1; | |
392 | else if ( currentP >= p[2] && currentP < p[3] ) index = 2; | |
393 | else if ( currentP >= p[3] && currentP < p[4] ) index = 3; | |
394 | else if ( currentP >= p[4] ) index = 4; | |
395 | ||
396 | Float_t ap = (currentP -p[index])*(a[index+1] - a[index])/ | |
397 | (p[index+1] - p[index]) + a[index]; | |
398 | fAp->AddAt(ap, i); | |
399 | } | |
400 | ||
401 | } | |
402 | ||
403 | //___________________________________________________________________________ | |
404 | void AliGenCRT::InitMomentumGeneration() | |
405 | { | |
406 | // | |
407 | // Initialize a funtion to generate the momentum randomly | |
408 | // acording this function. | |
409 | // | |
410 | ||
411 | // Check if we nned to initialize the function | |
412 | if ( fPMin != fPMax ) { | |
413 | ||
414 | // Check also if the function have been defined yet. | |
415 | if ( !fMomentumDist ) { | |
416 | ||
417 | // If not, use this function | |
418 | const char* y = "log10(x)"; | |
419 | ||
420 | const char* h1Coef = "[0]*( %s*%s*%s/2 - (5*%s*%s/2) + 3*%s )"; | |
421 | const char* h2Coef = "[1]*( (-2*%s*%s*%s/3) + (3*%s*%s) - 10*%s/3 + 1 )"; | |
422 | const char* h3Coef = "[2]*( %s*%s*%s/6 - %s*%s/2 + %s/3 )"; | |
423 | const char* s2Coef = "[3]*( %s*%s*%s/3 - 2*%s*%s + 11*%s/3 - 2 )"; | |
424 | ||
425 | const char* h = "%s + %s + %s + %s"; | |
426 | const char* flux = "pow(10., %s)"; | |
427 | const char* normalizedFlux = "0.86*x*x*x*pow(10., %s)"; | |
428 | const char* paramNames[4] = {"H1", "H2", "H3", "S1"}; | |
429 | ||
430 | char buffer1[1024]; | |
431 | char buffer2[1024]; | |
432 | char buffer3[1024]; | |
433 | char buffer4[1024]; | |
434 | char buffer5[1024]; | |
435 | char buffer6[1024]; | |
436 | char buffer7[1024]; | |
437 | ||
438 | sprintf(buffer1, h1Coef, y, y, y, y, y, y); | |
439 | sprintf(buffer2, h2Coef, y, y, y, y, y, y); | |
440 | sprintf(buffer3, h3Coef, y, y, y, y, y, y); | |
441 | sprintf(buffer4, s2Coef, y, y, y, y, y, y); | |
442 | ||
443 | sprintf(buffer5, h, buffer1, buffer2, buffer3, buffer4); | |
444 | ||
445 | sprintf(buffer6, flux, buffer5); | |
446 | ||
447 | fMomentumDist = new TF1("fMomentumDist", buffer6, fPMin, fPMax); | |
448 | sprintf(buffer7, normalizedFlux, buffer5); | |
449 | fUnfoldedMomentumDist = new TF1("fUnfoldedMomentumDist", buffer7, fPMin, fPMax); | |
450 | for (Int_t i = 0; i < 4; i++ ) { | |
451 | fMomentumDist->SetParName(i, paramNames[i]); | |
452 | fUnfoldedMomentumDist->SetParName(i, paramNames[i]); | |
453 | } | |
454 | ||
455 | fMomentumDist->SetParameter(0, 0.133); | |
456 | fMomentumDist->SetParameter(1, -2.521); | |
457 | fMomentumDist->SetParameter(2, -5.78); | |
458 | fMomentumDist->SetParameter(3, -2.11); | |
459 | ||
460 | fUnfoldedMomentumDist->SetParameter(0, 0.133); | |
461 | fUnfoldedMomentumDist->SetParameter(1, -2.521); | |
462 | fUnfoldedMomentumDist->SetParameter(2, -5.78); | |
463 | fUnfoldedMomentumDist->SetParameter(3, -2.11); | |
464 | ||
465 | } | |
466 | ||
467 | } | |
468 | ||
469 | } | |
470 | ||
471 | //____________________________________________________________________________ | |
472 | void AliGenCRT::InitZenithalAngleGeneration() | |
473 | { | |
474 | // | |
475 | // Initalize a distribution function for the zenith angle. | |
476 | // This angle will be obtained randomly acording this function. | |
477 | // The generated angles will been in degrees. | |
478 | ||
479 | // Check if we need to create the function. | |
480 | if ( fZenithMin != fZenithMax ) { | |
481 | ||
482 | // Check also if another function have been defined. | |
483 | if ( !fZenithDist ) { | |
484 | ||
485 | // initialize the momentum dependent coefficients, a(p) | |
fddb5247 | 486 | this->InitApWeightFactors(); |
71352da6 | 487 | |
488 | // Define the standard function. | |
8e8eae84 | 489 | const char* zenithalDisributionFunction = "1 + [0]*(1 - cos(x*3.14159265358979312/180))"; |
71352da6 | 490 | |
491 | Int_t pEnd = TMath::Abs(TMath::Nint(fPMax/fPResolution)) + 1; | |
492 | fPDist = new TClonesArray("TF1", pEnd); | |
493 | TClonesArray &angle = *fPDist; | |
494 | for ( Int_t i = 0; i < pEnd; i++ ) { | |
495 | // Fill the distribution | |
496 | TF1* zenith = new(angle[i]) TF1("zenith",zenithalDisributionFunction, fZenithMin, fZenithMax); | |
497 | ||
498 | // Fix the momentum dependent coefficients | |
499 | zenith->SetParName(0, "a(p)"); | |
500 | zenith->SetParameter(0, fAp->At(i)); | |
501 | ||
502 | } | |
503 | ||
504 | } | |
505 | ||
506 | } | |
507 | ||
508 | } | |
509 | ||
510 | //____________________________________________________________________________ | |
fddb5247 | 511 | const Float_t AliGenCRT::GetZenithAngle(Float_t mom) const |
71352da6 | 512 | { |
513 | ||
514 | Float_t zenith = 0.; | |
515 | // Check if you need to generate a constant zenith angle. | |
516 | if ( !fZenithDist ) { | |
517 | // Check if you have defined an array of momentum functions | |
518 | if ( fPDist ) { | |
519 | Int_t pIndex = TMath::Abs(TMath::Nint(mom)); | |
520 | TF1* zenithAngle = (TF1*)fPDist->UncheckedAt(pIndex); | |
bb5ce8b0 | 521 | |
522 | Float_t tmpzenith = TMath::Cos(zenithAngle->GetRandom()*kDegrad); | |
523 | // Correct the value | |
524 | zenith = kRaddeg*TMath::ACos(1 - (tmpzenith - 1)/fAp->At(pIndex)); | |
71352da6 | 525 | return zenith; |
526 | } else { | |
527 | ||
528 | if ( fCRMode != kMuonFlux ) { | |
529 | // If you aren't generating muons obeying any ditribution | |
530 | // only generate a flat zenith angle, acording the input settings | |
531 | Float_t random[2]; | |
532 | Rndm(random, 2); | |
533 | zenith = fZenithMin + (fZenithMax - fZenithMin)*random[0]; | |
534 | ||
535 | } else { | |
536 | // Even if you are generating muons acording some distribution, | |
537 | // but you don't want to ... | |
538 | zenith = fZenithMin; | |
539 | ||
540 | } | |
541 | ||
542 | } | |
543 | } else { | |
544 | zenith = fZenithDist->GetRandom(); | |
545 | } | |
bb5ce8b0 | 546 | |
71352da6 | 547 | return zenith; |
71352da6 | 548 | } |
549 | ||
bb5ce8b0 | 550 | //_____________________________________________________________________________ |
fddb5247 | 551 | const Float_t AliGenCRT::GetMomentum() const |
bb5ce8b0 | 552 | { |
553 | // | |
554 | // | |
555 | // | |
556 | return fMomentumDist->GetRandom(); | |
557 | } |