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4c039060 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
94de3818 | 18 | Revision 1.17 2000/07/12 08:56:25 fca |
19 | Coding convention correction and warning removal | |
20 | ||
8918e700 | 21 | Revision 1.16 2000/05/26 08:35:03 fca |
22 | Move the check on z after z has been retrieved | |
23 | ||
119a6af6 | 24 | Revision 1.15 2000/05/16 13:10:40 fca |
25 | New method IsNewTrack and fix for a problem in Father-Daughter relations | |
26 | ||
a01a8b12 | 27 | Revision 1.14 2000/04/27 10:38:21 fca |
28 | Correct termination of Lego Run and introduce Lego getter in AliRun | |
29 | ||
838edcaf | 30 | Revision 1.13 2000/04/26 10:17:31 fca |
31 | Changes in Lego for G4 compatibility | |
32 | ||
dffd31ef | 33 | Revision 1.12 2000/04/07 11:12:33 fca |
34 | G4 compatibility changes | |
35 | ||
875c717b | 36 | Revision 1.11 2000/03/22 13:42:26 fca |
37 | SetGenerator does not replace an existing generator, ResetGenerator does | |
38 | ||
ee1dd322 | 39 | Revision 1.10 2000/02/23 16:25:22 fca |
40 | AliVMC and AliGeant3 classes introduced | |
41 | ReadEuclid moved from AliRun to AliModule | |
42 | ||
b13db077 | 43 | Revision 1.9 1999/12/03 10:54:01 fca |
44 | Fix lego summary | |
45 | ||
00719c1b | 46 | Revision 1.8 1999/10/01 09:54:33 fca |
47 | Correct logics for Lego StepManager | |
48 | ||
f059c84a | 49 | Revision 1.7 1999/09/29 09:24:29 fca |
50 | Introduction of the Copyright and cvs Log | |
51 | ||
4c039060 | 52 | */ |
53 | ||
fe4da5cc | 54 | ////////////////////////////////////////////////////////////// |
55 | ////////////////////////////////////////////////////////////// | |
56 | // | |
57 | // Utility class to evaluate the material budget from | |
58 | // a given radius to the surface of an arbitrary cylinder | |
59 | // along radial directions from the centre: | |
60 | // | |
61 | // - radiation length | |
62 | // - Interaction length | |
63 | // - g/cm2 | |
64 | // | |
65 | // Geantinos are shot in the bins in the fNtheta bins in theta | |
66 | // and fNphi bins in phi with specified rectangular limits. | |
67 | // The statistics are accumulated per | |
68 | // fRadMin < r < fRadMax and <0 < z < fZMax | |
69 | // | |
70 | // To activate this option, you can do: | |
71 | // Root > gAlice.RunLego(); | |
72 | // or Root > .x menu.C then select menu item "RunLego" | |
73 | // Note that when calling gAlice->RunLego, an optional list | |
74 | // of arguments may be specified. | |
75 | // | |
76 | //Begin_Html | |
77 | /* | |
1439f98e | 78 | <img src="picts/alilego.gif"> |
fe4da5cc | 79 | */ |
80 | //End_Html | |
81 | // | |
82 | ////////////////////////////////////////////////////////////// | |
83 | ||
84 | #include "TMath.h" | |
94de3818 | 85 | |
1578254f | 86 | #include "AliLego.h" |
8918e700 | 87 | #include "AliLegoGenerator.h" |
fe4da5cc | 88 | #include "AliRun.h" |
89 | #include "AliConst.h" | |
875c717b | 90 | #include "AliMC.h" |
94de3818 | 91 | #include "TH2.h" |
fe4da5cc | 92 | |
93 | ClassImp(AliLego) | |
94 | ||
95 | ||
96 | //___________________________________________ | |
97 | AliLego::AliLego() | |
98 | { | |
8918e700 | 99 | // |
100 | // Default constructor | |
101 | // | |
102 | fHistRadl = 0; | |
103 | fHistAbso = 0; | |
104 | fHistGcm2 = 0; | |
105 | fHistReta = 0; | |
fe4da5cc | 106 | } |
107 | ||
108 | //___________________________________________ | |
8918e700 | 109 | AliLego::AliLego(const char *title, Int_t ntheta, Float_t themin, |
110 | Float_t themax, Int_t nphi, Float_t phimin, Float_t phimax, | |
b13db077 | 111 | Float_t rmin, Float_t rmax, Float_t zmax) |
112 | : TNamed("Lego Generator",title) | |
fe4da5cc | 113 | { |
8918e700 | 114 | // |
115 | // specify the angular limits and the size of the rectangular box | |
116 | // | |
b13db077 | 117 | fGener = new AliLegoGenerator(ntheta, themin, themax, |
118 | nphi, phimin, phimax, rmin, rmax, zmax); | |
119 | ||
ee1dd322 | 120 | gAlice->ResetGenerator(fGener); |
b13db077 | 121 | |
122 | Float_t etamin = -TMath::Log(TMath::Tan(TMath::Min((Double_t)themax*kDegrad/2,TMath::Pi()/2-1.e-10))); | |
123 | Float_t etamax = -TMath::Log(TMath::Tan(TMath::Max((Double_t)themin*kDegrad/2, 1.e-10))); | |
124 | ||
125 | fHistRadl = new TH2F("hradl","Radiation length map", | |
126 | nphi,phimin,phimax,ntheta,themin,themax); | |
127 | fHistAbso = new TH2F("habso","Interaction length map", | |
128 | nphi,phimin,phimax,ntheta,themin,themax); | |
129 | fHistGcm2 = new TH2F("hgcm2","g/cm2 length map", | |
130 | nphi,phimin,phimax,ntheta,themin,themax); | |
131 | fHistReta = new TH2F("hetar","Radiation length vs. eta", | |
132 | nphi,phimin,phimax,ntheta,etamin,etamax); | |
133 | ||
fe4da5cc | 134 | } |
135 | ||
136 | //___________________________________________ | |
137 | AliLego::~AliLego() | |
138 | { | |
8918e700 | 139 | // |
140 | // Destructor | |
141 | // | |
142 | delete fHistRadl; | |
143 | delete fHistAbso; | |
144 | delete fHistGcm2; | |
145 | delete fHistReta; | |
146 | gAlice->ResetGenerator(0); | |
147 | delete fGener; | |
fe4da5cc | 148 | } |
149 | ||
b13db077 | 150 | //___________________________________________ |
dffd31ef | 151 | void AliLego::BeginEvent() |
b13db077 | 152 | { |
8918e700 | 153 | // |
154 | // --- Set to 0 radiation length, absorption length and g/cm2 --- | |
155 | // | |
dffd31ef | 156 | fTotRadl = 0; |
157 | fTotAbso = 0; | |
158 | fTotGcm2 = 0; | |
159 | } | |
160 | ||
161 | //___________________________________________ | |
162 | void AliLego::FinishEvent() | |
163 | { | |
8918e700 | 164 | // |
165 | // Finish the event and update the histos | |
166 | // | |
dffd31ef | 167 | Double_t thed, phid, eta; |
168 | thed = fGener->CurTheta()*kRaddeg; | |
169 | phid = fGener->CurPhi()*kRaddeg; | |
170 | eta = -TMath::Log(TMath::Tan(TMath::Max( | |
b13db077 | 171 | TMath::Min((Double_t)(fGener->CurTheta())/2, |
172 | TMath::Pi()/2-1.e-10),1.e-10))); | |
173 | ||
dffd31ef | 174 | fHistRadl->Fill(phid,thed,fTotRadl); |
175 | fHistAbso->Fill(phid,thed,fTotAbso); | |
176 | fHistGcm2->Fill(phid,thed,fTotGcm2); | |
177 | fHistReta->Fill(phid,eta,fTotRadl); | |
b13db077 | 178 | } |
179 | ||
dffd31ef | 180 | //___________________________________________ |
181 | void AliLego::FinishRun() | |
182 | { | |
8918e700 | 183 | // |
184 | // Store histograms in current Root file | |
185 | // | |
dffd31ef | 186 | fHistRadl->Write(); |
187 | fHistAbso->Write(); | |
188 | fHistGcm2->Write(); | |
189 | fHistReta->Write(); | |
190 | ||
191 | // Delete histograms from memory | |
192 | fHistRadl->Delete(); fHistRadl=0; | |
193 | fHistAbso->Delete(); fHistAbso=0; | |
194 | fHistGcm2->Delete(); fHistGcm2=0; | |
195 | fHistReta->Delete(); fHistReta=0; | |
196 | ||
197 | } | |
198 | ||
8918e700 | 199 | //___________________________________________ |
200 | void AliLego::Copy(AliLego &lego) const | |
201 | { | |
202 | // | |
203 | // Copy *this onto lego -- not implemented | |
204 | // | |
205 | Fatal("Copy","Not implemented!\n"); | |
206 | } | |
dffd31ef | 207 | |
b13db077 | 208 | //___________________________________________ |
209 | void AliLego::StepManager() | |
210 | { | |
211 | // called from AliRun::Stepmanager from gustep. | |
212 | // Accumulate the 3 parameters step by step | |
213 | ||
214 | static Float_t t; | |
215 | Float_t a,z,dens,radl,absl; | |
216 | Int_t i; | |
217 | ||
218 | Float_t step = gMC->TrackStep(); | |
219 | ||
220 | Float_t vect[3], dir[3]; | |
221 | TLorentzVector pos, mom; | |
222 | ||
119a6af6 | 223 | gMC->CurrentMaterial(a,z,dens,radl,absl); |
224 | ||
a01a8b12 | 225 | if (z < 1) return; |
226 | ||
b13db077 | 227 | gMC->TrackPosition(pos); |
228 | gMC->TrackMomentum(mom); | |
b13db077 | 229 | // --- See if we have to stop now |
230 | if (TMath::Abs(pos[2]) > fGener->ZMax() || | |
231 | pos[0]*pos[0] +pos[1]*pos[1] > fGener->RadMax()*fGener->RadMax()) { | |
a01a8b12 | 232 | if (!gMC->IsNewTrack()) { |
b13db077 | 233 | // Not the first step, add past contribution |
234 | fTotAbso += t/absl; | |
235 | fTotRadl += t/radl; | |
236 | fTotGcm2 += t*dens; | |
237 | } | |
238 | gMC->StopTrack(); | |
239 | return; | |
240 | } | |
241 | ||
242 | // --- See how long we have to go | |
243 | for(i=0;i<3;++i) { | |
244 | vect[i]=pos[i]; | |
245 | dir[i]=mom[i]; | |
246 | } | |
247 | ||
248 | t = fGener->PropagateCylinder(vect,dir,fGener->RadMax(),fGener->ZMax()); | |
249 | ||
250 | if(step) { | |
251 | fTotAbso += step/absl; | |
252 | fTotRadl += step/radl; | |
253 | fTotGcm2 += step*dens; | |
254 | } | |
255 | } | |
256 |