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b0f5e3fc | 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 | $Log$ | |
b9d0a01d | 18 | Revision 1.9.8.1 2002/07/24 09:27:50 alibrary |
19 | Updating on VirtualMC | |
20 | ||
21 | Revision 1.11 2002/07/11 10:24:21 barbera | |
22 | Fixes to make tracking V2 working with the HEAD and with fast points. Waiting for a fix in slow reconstruction of SPD, fast points are temporarily made the default for tracking V2. | |
23 | ||
4465d468 | 24 | Revision 1.10 2002/06/10 17:30:24 nilsen |
25 | A new CreateFastRecPoints has been made and the old one made compatible. | |
26 | ||
785086f0 | 27 | Revision 1.9 2001/10/01 19:36:03 nilsen |
28 | fixed a compilation warning about unused variable. | |
29 | ||
84f9ba63 | 30 | Revision 1.8 2001/07/27 08:06:49 hristov |
31 | Use global gRandom generator (M.Ivanov) | |
32 | ||
4c57765b | 33 | Revision 1.7 2001/05/11 09:15:21 barbera |
34 | Corrected to make fast point creation working with PPR geometry | |
35 | ||
34980f24 | 36 | Revision 1.6 2000/10/29 18:30:14 barbera |
37 | Z resolution of pixel changed according with the default lenght of 425 microns | |
38 | ||
21d3c626 | 39 | Revision 1.1.2.6 2000/10/29 18:29:51 barbera |
40 | Z resolution of pixel changed according with the default lenght of 425 microns | |
41 | ||
1ca7869b | 42 | Revision 1.1.2.5 2000/10/02 16:03:20 barbera |
43 | Forward declarations added | |
44 | ||
45 | Revision 1.4 2000/09/22 12:43:59 nilsen | |
46 | Default track number set to -3 and not 0. | |
47 | ||
b0f5e3fc | 48 | */ |
e8189707 | 49 | #include <TRandom.h> |
b0f5e3fc | 50 | |
b0f5e3fc | 51 | #include "AliITS.h" |
517784f0 | 52 | #include "AliITShit.h" |
53 | #include "AliITSRecPoint.h" | |
54 | #include "AliITSmodule.h" | |
55 | #include "AliITSgeom.h" | |
e8189707 | 56 | #include "AliRun.h" |
b0f5e3fc | 57 | #include "AliITSsimulationFastPoints.h" |
e8189707 | 58 | |
b0f5e3fc | 59 | |
60 | ClassImp(AliITSsimulationFastPoints) | |
61 | ||
62 | AliITSsimulationFastPoints::AliITSsimulationFastPoints() | |
63 | { | |
64 | //constructor | |
e8189707 | 65 | fSigmaRPhi[0] = fSigmaRPhi[1] = 12e-4; |
66 | fSigmaRPhi[2] = fSigmaRPhi[3] = 38e-4; | |
67 | fSigmaRPhi[4] = fSigmaRPhi[5] = 20e-4; | |
21d3c626 | 68 | fSigmaZ[0] = fSigmaZ[1] = 120e-4; // resolution for 425 micron pixels |
e8189707 | 69 | fSigmaZ[2] = fSigmaZ[3] = 28e-4; |
70 | fSigmaZ[4] = fSigmaZ[5] = 830e-4; | |
71 | fSigmaDe[0] = fSigmaDe[1] = 0.72e-6; | |
72 | fSigmaDe[2] = fSigmaDe[3] = 0.90e-6; | |
73 | fSigmaDe[4] = fSigmaDe[5] = 5e-6; | |
74 | fThrDe[0] = fThrDe[1] = 7.2e-6; | |
75 | fThrDe[2] = fThrDe[3] = 2.70e-6; | |
76 | fThrDe[4] = fThrDe[5] = 10e-6; | |
b0f5e3fc | 77 | } |
78 | ||
e8189707 | 79 | //------------------------------------------------------------- |
785086f0 | 80 | void AliITSsimulationFastPoints::CreateFastRecPoints(Int_t module){ |
81 | // Fast points simulator | |
82 | AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
b0f5e3fc | 83 | |
785086f0 | 84 | CreateFastRecPoints((AliITSmodule *)(aliITS->GetModule(module)), |
85 | module,gRandom); | |
86 | } | |
87 | //------------------------------------------------------------- | |
88 | void AliITSsimulationFastPoints::CreateFastRecPoints(AliITSmodule *mod, | |
89 | Int_t module, | |
90 | TRandom *random){ | |
91 | // Fast points simulator | |
92 | AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
93 | AliITSgeom *gm = aliITS->GetITSgeom(); | |
94 | ||
95 | const Float_t kdEdXtoQ = 2.778e+8; | |
96 | ||
97 | Int_t ihit,flag,numofhits; | |
98 | Float_t locals[3]; | |
99 | Float_t globals[3]; | |
100 | Double_t sigmarphi=0., sigmaz=0., sigmade=0., thrde=0.; | |
101 | Float_t deltaXl,deltaZl,deltaDe; | |
102 | ||
103 | Int_t hitlay, hitlad, hitdet, hitstatus; | |
104 | Float_t hitpx, hitpy, hitpz, hitdestep; | |
105 | ||
106 | Int_t hitstatus1, hittrack1; | |
107 | Float_t hitx1, hity1, hitz1; | |
108 | Float_t hitdestep1; | |
109 | Float_t xMg,yMg,zMg; | |
110 | ||
111 | numofhits = mod->GetNhits(); | |
112 | //printf("numofhits %d \n",numofhits); | |
113 | for(ihit=0;ihit<numofhits;ihit++){ | |
114 | AliITShit *hit=mod->GetHit(ihit); | |
115 | hit->GetPositionG(hitx1,hity1,hitz1); | |
116 | hitstatus1 = hit->GetTrackStatus(); | |
117 | hitdestep1 = hit->GetIonization(); | |
118 | hittrack1 = hit->GetTrack(); | |
119 | ||
120 | mod->MedianHit(module,hitx1,hity1,hitz1,hitstatus1,xMg,yMg,zMg,flag); | |
121 | if (flag!=1) { | |
122 | hitdestep = hit->GetIonization(); | |
123 | ||
124 | if (hitdestep > 0) { | |
125 | hit->GetDetectorID(hitlay,hitlad,hitdet); | |
126 | hit->GetMomentumG(hitpx,hitpy,hitpz); | |
127 | hitstatus = hitstatus1; | |
128 | // Transform to the module local frame | |
129 | globals[0] = xMg; | |
130 | globals[1] = yMg; | |
131 | globals[2] = zMg; | |
132 | gm->GtoL(hitlay,hitlad,hitdet,globals,locals); | |
133 | // Retrieve sigma values for position and energy, and energy | |
134 | // threshold | |
135 | sigmarphi = SigmaRPhi(hitlay); | |
136 | sigmaz = SigmaZ(hitlay); | |
137 | sigmade = SigmaDe(hitlay); | |
138 | thrde = ThrDe(hitlay); | |
139 | deltaXl = random->Gaus(0,sigmarphi); | |
140 | deltaZl = random->Gaus(0,sigmaz); | |
141 | deltaDe = random->Gaus(0,sigmade); | |
142 | ||
143 | // Apply energy threshold and trasform back to global reference | |
144 | // system | |
145 | ||
146 | if ( (hitdestep+deltaDe) > thrde ){ | |
147 | locals[0] += deltaXl; | |
148 | locals[2] += deltaZl; | |
149 | AliITSRecPoint rp; | |
4465d468 | 150 | rp.fTracks[0]=hit->GetTrack(); |
151 | // rp.fTracks[0]=mod->GetHitTrackIndex(ihit); | |
785086f0 | 152 | rp.fTracks[1]=-3; |
153 | rp.fTracks[2]=-3; | |
154 | rp.SetX(locals[0]); | |
155 | rp.SetZ(locals[2]); | |
156 | rp.SetdEdX(hitdestep+deltaDe); | |
157 | rp.SetQ(kdEdXtoQ*(hitdestep+deltaDe)); // number of e | |
158 | rp.SetSigmaX2(sigmarphi*sigmarphi); | |
159 | rp.SetSigmaZ2(sigmaz*sigmaz); | |
160 | aliITS->AddRecPoint(rp); | |
161 | } // end if ( (hitdestep+deltaDe) | |
162 | } // end if (hitdestep > 0) | |
163 | } // end if (flag!=1) | |
164 | } // end for ihit | |
b0f5e3fc | 165 | } |
e8189707 | 166 | //_______________________________________________________________________ |
167 | void AliITSsimulationFastPoints::SetSigmaRPhi(Double_t srphi[6]) | |
168 | { | |
169 | // set sigmas in rphi | |
b0f5e3fc | 170 | |
e8189707 | 171 | Int_t i; |
172 | for (i=0; i<6; i++) { | |
173 | fSigmaRPhi[i]=srphi[i]; | |
174 | } | |
b0f5e3fc | 175 | } |
176 | //_______________________________________________________________________ | |
e8189707 | 177 | void AliITSsimulationFastPoints::SetSigmaZ(Double_t sz[6]) |
178 | { | |
179 | // set sigmas in z | |
180 | ||
181 | Int_t i; | |
182 | for (i=0; i<6; i++) { | |
183 | fSigmaZ[i]=sz[i]; | |
184 | } | |
b0f5e3fc | 185 | } |
186 | //_______________________________________________________________________ | |
e8189707 | 187 | void AliITSsimulationFastPoints::SetSigmaDe(Double_t sde[6]) |
188 | { | |
189 | // set sigmas in energy | |
190 | ||
191 | Int_t i; | |
192 | for (i=0; i<6; i++) { | |
193 | fSigmaDe[i]=sde[i]; | |
194 | } | |
b0f5e3fc | 195 | } |
196 | //_______________________________________________________________________ | |
e8189707 | 197 | void AliITSsimulationFastPoints::SetThrDe(Double_t thrde[6]) |
198 | { | |
199 | // set energy thersholds | |
200 | ||
201 | Int_t i; | |
202 | for (i=0; i<6; i++) { | |
203 | fThrDe[i]=thrde[i]; | |
204 | } | |
b0f5e3fc | 205 | } |
e8189707 | 206 |