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88cb7938 | 1 | #include "AliHBTPositionRandomizer.h" |
abe00f6f | 2 | //___________________________________________________ |
3 | //////////////////////////////////////////////////////////////////////////////// | |
4 | // | |
5 | // class AliHBTPositionRandomizer | |
6 | // | |
7 | // These class randomizes particle vertex positions | |
8 | // Piotr.Skowronski@cern.ch | |
9 | // | |
10 | //////////////////////////////////////////////////////////////////////////////// | |
11 | ||
88cb7938 | 12 | #include <TRandom.h> |
13 | #include "AliHBTRun.h" | |
14 | #include "AliHBTEvent.h" | |
15 | #include "AliHBTParticle.h" | |
16 | ||
17 | ||
18 | ClassImp(AliHBTPositionRandomizer) | |
19 | ||
20 | /*********************************************************************/ | |
21 | ||
22 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(): | |
23 | fReader(0x0), | |
24 | fRandomizer(0x0), | |
25 | fModel(0), | |
26 | fAddToExistingPos(kFALSE), | |
27 | fOnlyParticlesFromVertex(kFALSE), | |
28 | fVX(0.0), | |
29 | fVY(0.0), | |
30 | fVZ(0.0) | |
31 | { | |
32 | //constructor | |
33 | } | |
34 | /*********************************************************************/ | |
35 | ||
36 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(AliHBTReader* reader): | |
37 | fReader(reader), | |
38 | fRandomizer(new AliHBTRndmGaussBall(8.0)), | |
39 | fModel(0), | |
40 | fAddToExistingPos(kFALSE), | |
41 | fOnlyParticlesFromVertex(kFALSE), | |
42 | fVX(0.0), | |
43 | fVY(0.0), | |
44 | fVZ(0.0) | |
45 | { | |
46 | //constructor | |
47 | } | |
48 | /*********************************************************************/ | |
49 | ||
abe00f6f | 50 | AliHBTPositionRandomizer::AliHBTPositionRandomizer(const AliHBTPositionRandomizer& in): |
51 | AliHBTReader(in), | |
52 | fReader(), | |
53 | fRandomizer(0x0), | |
54 | fModel(0), | |
55 | fAddToExistingPos(kFALSE), | |
56 | fOnlyParticlesFromVertex(kFALSE), | |
57 | fVX(0.0), | |
58 | fVY(0.0), | |
59 | fVZ(0.0) | |
60 | { | |
61 | //cpy constructor | |
62 | in.Copy(*this); | |
63 | } | |
64 | /*********************************************************************/ | |
65 | AliHBTPositionRandomizer::~AliHBTPositionRandomizer() | |
66 | { | |
67 | //dtor | |
68 | delete fReader; | |
69 | delete fRandomizer; | |
70 | } | |
71 | /*********************************************************************/ | |
34914285 | 72 | AliHBTPositionRandomizer& AliHBTPositionRandomizer::operator=(const AliHBTPositionRandomizer& in) |
abe00f6f | 73 | { |
74 | //assigment operator | |
75 | in.Copy(*this); | |
76 | return *this; | |
77 | } | |
78 | /*********************************************************************/ | |
79 | ||
efaf00f8 | 80 | AliHBTEvent* AliHBTPositionRandomizer::GetParticleEvent() |
81 | { | |
82 | // gets from fReader and randomizes current particle event | |
83 | if (fReader == 0x0) return 0x0; | |
84 | AliHBTEvent *e = fReader->GetParticleEvent(); | |
85 | if (e->IsRandomized() == kFALSE) Randomize(e); | |
86 | return e; | |
87 | } | |
88 | /*********************************************************************/ | |
89 | ||
90 | AliHBTEvent* AliHBTPositionRandomizer::GetTrackEvent() | |
91 | { | |
92 | // gets from fReader and randomizes current track event | |
93 | if (fReader == 0x0) return 0x0; | |
94 | AliHBTEvent *e = fReader->GetTrackEvent(); | |
95 | if (e->IsRandomized() == kFALSE) Randomize(e); | |
96 | return e; | |
97 | } | |
98 | /*********************************************************************/ | |
99 | ||
88cb7938 | 100 | Int_t AliHBTPositionRandomizer::Read(AliHBTRun* particles, AliHBTRun *tracks) |
101 | { | |
efaf00f8 | 102 | //Reads all available events and randomizes them |
88cb7938 | 103 | if (fReader == 0x0) return 1; |
cc77a98f | 104 | if (AliHBTParticle::GetDebug() > 5) Info("Randomize(AliHBTRun*)",""); |
88cb7938 | 105 | Int_t err = fReader->Read(particles,tracks); |
106 | if (err) return err; | |
107 | Randomize(particles); | |
108 | return 0; | |
109 | } | |
110 | /*********************************************************************/ | |
111 | ||
112 | AliHBTEvent* AliHBTPositionRandomizer::GetParticleEvent(Int_t n) | |
113 | { | |
114 | //returns event n | |
115 | if (fReader == 0x0) return 0x0; | |
116 | AliHBTEvent *e = fReader->GetParticleEvent(n); | |
117 | if (e->IsRandomized() == kFALSE) Randomize(e); | |
118 | return e; | |
119 | } | |
120 | ||
121 | /*********************************************************************/ | |
122 | ||
abe00f6f | 123 | void AliHBTPositionRandomizer::Randomize(AliHBTRun* run) const |
88cb7938 | 124 | { |
125 | // randomizes postions of all particles in the run | |
126 | if (run == 0x0) return; | |
cc77a98f | 127 | if (AliHBTParticle::GetDebug() > 5) Info("Randomize(AliHBTRun*)",""); |
88cb7938 | 128 | for (Int_t i = 0; i < run->GetNumberOfEvents(); i++) |
129 | { | |
130 | Randomize(run->GetEvent(i)); | |
131 | } | |
132 | } | |
133 | /*********************************************************************/ | |
abe00f6f | 134 | void AliHBTPositionRandomizer::Randomize(AliHBTEvent* event) const |
88cb7938 | 135 | { |
136 | // randomizes postions of all particles in the event | |
abe00f6f | 137 | static const Double_t kfmtocm = 1.e-13; |
cc77a98f | 138 | if (AliHBTParticle::GetDebug() > 5) Info("Randomize(AliHBTEvent*)",""); |
88cb7938 | 139 | if (event == 0x0) return; |
140 | ||
141 | for (Int_t i = 0; i < event->GetNumberOfParticles(); i++) | |
142 | { | |
143 | AliHBTParticle* p = event->GetParticle(i); | |
144 | Double_t x,y,z,t=0.0; | |
145 | fRandomizer->Randomize(x,y,z,p); | |
abe00f6f | 146 | p->SetProductionVertex(x*kfmtocm,y*kfmtocm,z*kfmtocm,t*kfmtocm); |
88cb7938 | 147 | } |
148 | event->SetRandomized(); | |
149 | } | |
150 | /*********************************************************************/ | |
151 | ||
152 | void AliHBTPositionRandomizer::SetGaussianBall(Double_t r) | |
153 | { | |
abe00f6f | 154 | //Sets Gaussian Ball Model |
88cb7938 | 155 | SetGaussianBall(r,r,r); |
156 | } | |
157 | /*********************************************************************/ | |
158 | ||
159 | void AliHBTPositionRandomizer::SetGaussianBall(Double_t rx, Double_t ry, Double_t rz) | |
160 | { | |
abe00f6f | 161 | //Sets Gaussian Ball Model |
88cb7938 | 162 | delete fRandomizer; |
163 | fRandomizer = new AliHBTRndmGaussBall(rx,ry,rz); | |
164 | } | |
165 | /*********************************************************************/ | |
166 | ||
167 | void AliHBTPositionRandomizer::SetCyllinderSurface(Double_t r, Double_t l) | |
168 | { | |
abe00f6f | 169 | //Sets Cylinder Surface Model |
88cb7938 | 170 | delete fRandomizer; |
171 | fRandomizer = new AliHBTRndmCyllSurf(r,l); | |
172 | } | |
173 | /*********************************************************************/ | |
174 | ||
175 | void AliHBTPositionRandomizer::SetEventVertex(Double_t x, Double_t y,Double_t z) | |
176 | { | |
177 | //sets event vertex position | |
178 | fVX = x; | |
179 | fVY = y; | |
180 | fVZ = z; | |
181 | } | |
182 | /*********************************************************************/ | |
183 | //_____________________________________________________________________ | |
184 | /////////////////////////////////////////////////////////////////////// | |
185 | // // | |
186 | // class AliHBTRndmGaussBall // | |
187 | // // | |
188 | /////////////////////////////////////////////////////////////////////// | |
189 | ||
190 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(): | |
191 | fRx(0.0), | |
192 | fRy(0.0), | |
193 | fRz(0.0) | |
194 | { | |
195 | //constructor | |
196 | } | |
197 | /*********************************************************************/ | |
198 | ||
199 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(Float_t r): | |
200 | fRx(r), | |
201 | fRy(r), | |
202 | fRz(r) | |
203 | { | |
204 | //constructor | |
205 | } | |
206 | /*********************************************************************/ | |
207 | ||
208 | AliHBTRndmGaussBall::AliHBTRndmGaussBall(Float_t rx, Float_t ry, Float_t rz): | |
209 | fRx(rx), | |
210 | fRy(ry), | |
211 | fRz(rz) | |
212 | { | |
213 | //constructor | |
214 | } | |
215 | /*********************************************************************/ | |
216 | ||
abe00f6f | 217 | void AliHBTRndmGaussBall::Randomize(Double_t& x,Double_t& y,Double_t&z, AliHBTParticle*/*particle*/) const |
88cb7938 | 218 | { |
219 | //randomizez gauss for each coordinate separately | |
220 | x = gRandom->Gaus(0.0,fRx); | |
221 | y = gRandom->Gaus(0.0,fRy); | |
222 | z = gRandom->Gaus(0.0,fRz); | |
223 | } | |
224 | /*********************************************************************/ | |
225 | //_____________________________________________________________________ | |
226 | /////////////////////////////////////////////////////////////////////// | |
227 | // // | |
228 | // class AliHBTRndmGaussBall // | |
229 | // // | |
230 | /////////////////////////////////////////////////////////////////////// | |
231 | ||
abe00f6f | 232 | void AliHBTRndmCyllSurf::Randomize(Double_t& x,Double_t& y,Double_t&z, AliHBTParticle* particle) const |
88cb7938 | 233 | { |
abe00f6f | 234 | //Randomizes x,y,z |
568f8a1a | 235 | Double_t r = fR + gRandom->Gaus(0.0, 1.0); |
bed069a4 | 236 | Double_t sf = r/particle->Pt();//scaling factor for position transformation -> |
88cb7938 | 237 | //we move direction of string momentum but legth defined by r |
bed069a4 | 238 | x = sf*particle->Px(); |
239 | y = sf*particle->Py(); | |
88cb7938 | 240 | z = gRandom->Uniform(-fL,fL); |
88cb7938 | 241 | } |