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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 | $Log$ | |
18 | Revision 1.2 2000/05/18 13:45:57 jbarbosa | |
19 | Fixed feedback photon origin coordinates | |
20 | ||
21 | Revision 1.1 2000/04/19 12:57:20 morsch | |
22 | Newly structured and updated version (JB, AM) | |
23 | ||
24 | */ | |
25 | ||
26 | ||
27 | #include "AliRICHChamber.h" | |
28 | ||
29 | #include <TLorentzVector.h> | |
30 | #include <TParticle.h> | |
31 | #include <TRandom.h> | |
32 | ||
33 | ClassImp(AliRICHChamber) | |
34 | ||
35 | AliRICHChamber::AliRICHChamber() | |
36 | { | |
37 | ||
38 | // | |
39 | // Chamber object constructor | |
40 | ||
41 | fSegmentation = 0; | |
42 | fResponse= 0; | |
43 | fGeometry= 0; | |
44 | frMin=0.1; | |
45 | frMax=140; | |
46 | fnsec=1; | |
47 | } | |
48 | ||
49 | AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber) | |
50 | { | |
51 | // Copy Constructor | |
52 | } | |
53 | ||
54 | ||
55 | AliRICHResponse* AliRICHChamber::GetResponseModel() | |
56 | { | |
57 | // | |
58 | // Get reference to response model | |
59 | return fResponse; | |
60 | } | |
61 | ||
62 | void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse) | |
63 | { | |
64 | // Configure response model | |
65 | fResponse=thisResponse; | |
66 | } | |
67 | ||
68 | void AliRICHChamber::Init() | |
69 | { | |
70 | // Initialise chambers | |
71 | fSegmentation->Init(this); | |
72 | } | |
73 | ||
74 | void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3]) | |
75 | { | |
76 | ||
77 | // Local coordinates to global coordinates transformation | |
78 | ||
79 | Double_t *fMatrix; | |
80 | fMatrix = fChamberMatrix->GetMatrix(); | |
81 | Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6]; | |
82 | Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7]; | |
83 | Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8]; | |
84 | Globalpos[0]+=fChamberTrans[0]; | |
85 | Globalpos[1]+=fChamberTrans[1]; | |
86 | Globalpos[2]+=fChamberTrans[2]; | |
87 | } | |
88 | ||
89 | void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3]) | |
90 | { | |
91 | ||
92 | // Global coordinates to local coordinates transformation | |
93 | ||
94 | Double_t *fMatrixOrig; | |
95 | TMatrix fMatrixCopy(3,3); | |
96 | fMatrixOrig = fChamberMatrix->GetMatrix(); | |
97 | for(Int_t i=0;i<3;i++) | |
98 | { | |
99 | for(Int_t j=0;j<3;j++) | |
100 | fMatrixCopy(j,i)=fMatrixOrig[j+3*i]; | |
101 | } | |
102 | fMatrixCopy.Invert(); | |
103 | //Int_t elements=fMatrixCopy.GetNoElements(); | |
104 | //printf("Elements:%d\n",elements); | |
105 | //fMatrixOrig= (Double_t*) fMatrixCopy; | |
106 | Localpos[0] = pos[0] - fChamberTrans[0]; | |
107 | Localpos[1] = pos[1] - fChamberTrans[1]; | |
108 | Localpos[2] = pos[2] - fChamberTrans[2]; | |
109 | //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]); | |
110 | //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]); | |
111 | Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2); | |
112 | Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2); | |
113 | Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2); | |
114 | //Localpos[0]-=fChamberTrans[0]; | |
115 | //Localpos[1]-=fChamberTrans[1]; | |
116 | //Localpos[2]-=fChamberTrans[2]; | |
117 | } | |
118 | ||
119 | ||
120 | void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit, | |
121 | Int_t& nnew,Float_t newclust[6][500],ResponseType res) | |
122 | { | |
123 | // | |
124 | // Generates pad hits (simulated cluster) | |
125 | // using the segmentation and the response model | |
126 | ||
127 | Float_t dx, dy; | |
128 | Float_t local[3]; | |
129 | //Float_t source[3]; | |
130 | Float_t global[3]; | |
131 | // | |
132 | // Width of the integration area | |
133 | // | |
134 | dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX()); | |
135 | dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY()); | |
136 | // | |
137 | // Get pulse height from energy loss and generate feedback photons | |
138 | Float_t qtot=0; | |
139 | ||
140 | local[0]=xhit; | |
141 | // z-position of the wires relative to the RICH mother volume | |
142 | // (2 mmm before CsI) old value: 6.076 | |
143 | local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2; | |
144 | //printf("AliRICHChamber feedback origin:%f",local[1]); | |
145 | local[2]=yhit; | |
146 | ||
147 | LocaltoGlobal(local,global); | |
148 | ||
149 | Int_t nFp=0; | |
150 | ||
151 | if (res==kMip) { | |
152 | qtot = fResponse->IntPH(eloss); | |
153 | nFp = fResponse->FeedBackPhotons(global,qtot); | |
154 | } else if (res==kCerenkov) { | |
155 | qtot = fResponse->IntPH(); | |
156 | nFp = fResponse->FeedBackPhotons(global,qtot); | |
157 | } | |
158 | ||
159 | //printf("Feedbacks:%d\n",nFp); | |
160 | ||
161 | // | |
162 | // Loop Over Pads | |
163 | ||
164 | Float_t qcheck=0, qp=0; | |
165 | ||
166 | nnew=0; | |
167 | for (Int_t i=1; i<=fnsec; i++) { | |
168 | qcheck=0; | |
169 | for (fSegmentation->FirstPad(xhit, yhit, dx, dy); | |
170 | fSegmentation->MorePads(); | |
171 | fSegmentation->NextPad()) | |
172 | { | |
173 | qp= fResponse->IntXY(fSegmentation); | |
174 | qp= TMath::Abs(qp); | |
175 | ||
176 | //printf("Qp:%f\n",qp); | |
177 | ||
178 | if (qp > 1.e-4) { | |
179 | qcheck+=qp; | |
180 | // | |
181 | // --- store signal information | |
182 | newclust[0][nnew]=qtot; | |
183 | newclust[1][nnew]=fSegmentation->Ix(); | |
184 | newclust[2][nnew]=fSegmentation->Iy(); | |
185 | newclust[3][nnew]=qp * qtot; | |
186 | newclust[4][nnew]=fSegmentation->ISector(); | |
187 | newclust[5][nnew]=(Float_t) i; | |
188 | nnew++; | |
189 | //printf("Newcluster:%d\n",i); | |
190 | } | |
191 | } // Pad loop | |
192 | } // Cathode plane loop | |
193 | //if (fSegmentation->ISector()==2) | |
194 | //printf("Nnew:%d\n\n\n\n",nnew); | |
195 | } | |
196 | ||
197 | ||
198 | AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs) | |
199 | { | |
200 | // Assignment operator | |
201 | return *this; | |
202 | ||
203 | } | |
204 | ||
205 |