New constructor (implemented in source). New Init().
[u/mrichter/AliRoot.git] / RICH / AliRICHChamber.cxx
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2e5f0f7b 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 $Log$
176a9917 18 Revision 1.7 2000/10/03 21:44:09 morsch
19 Use AliSegmentation and AliHit abstract base classes.
20
a2f7eaf6 21 Revision 1.6 2000/10/02 15:44:37 jbarbosa
22 Fixed forward declarations.
23
488e98ba 24 Revision 1.5 2000/07/13 16:19:45 fca
25 Mainly coding conventions + some small bug fixes
26
ef42d733 27 Revision 1.4 2000/06/30 16:48:58 dibari
28 New function GenerateTresholds() for pedestal simulation.
29
4faf338d 30 Revision 1.3 2000/06/12 15:17:58 jbarbosa
31 Cleaned up version.
32
237c933d 33 Revision 1.2 2000/05/18 13:45:57 jbarbosa
34 Fixed feedback photon origin coordinates
35
64cdfc12 36 Revision 1.1 2000/04/19 12:57:20 morsch
37 Newly structured and updated version (JB, AM)
38
2e5f0f7b 39*/
40
41
42#include "AliRICHChamber.h"
237c933d 43
2e5f0f7b 44#include <TLorentzVector.h>
45#include <TParticle.h>
46#include <TRandom.h>
488e98ba 47#include <TObjArray.h>
48#include <TRotMatrix.h>
49#include <AliRICHTresholdMap.h>
a2f7eaf6 50#include <AliSegmentation.h>
488e98ba 51#include <AliRICHGeometry.h>
52#include <AliRICHResponse.h>
2e5f0f7b 53
54ClassImp(AliRICHChamber)
55
56AliRICHChamber::AliRICHChamber()
57{
237c933d 58
59//
60// Chamber object constructor
61
2e5f0f7b 62 fSegmentation = 0;
4faf338d 63 fResponse = 0;
64 fGeometry = 0;
65 fTresh = 0;
66 frMin = 0.1;
67 frMax = 140;
68 fnsec = 1;
ef42d733 69 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
2e5f0f7b 70}
71
237c933d 72AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
73{
74// Copy Constructor
75}
76
77
2e5f0f7b 78AliRICHResponse* AliRICHChamber::GetResponseModel()
79{
237c933d 80//
81// Get reference to response model
2e5f0f7b 82 return fResponse;
83}
84
2e5f0f7b 85void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
86{
237c933d 87// Configure response model
2e5f0f7b 88 fResponse=thisResponse;
89}
90
a2f7eaf6 91void AliRICHChamber::Init(Int_t id)
2e5f0f7b 92{
237c933d 93// Initialise chambers
a2f7eaf6 94 fSegmentation->Init(id);
2e5f0f7b 95}
96
97void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
98{
99
237c933d 100// Local coordinates to global coordinates transformation
101
2e5f0f7b 102 Double_t *fMatrix;
103 fMatrix = fChamberMatrix->GetMatrix();
104 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
105 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
106 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
107 Globalpos[0]+=fChamberTrans[0];
108 Globalpos[1]+=fChamberTrans[1];
109 Globalpos[2]+=fChamberTrans[2];
110}
111
112void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
113{
114
237c933d 115// Global coordinates to local coordinates transformation
116
2e5f0f7b 117 Double_t *fMatrixOrig;
118 TMatrix fMatrixCopy(3,3);
119 fMatrixOrig = fChamberMatrix->GetMatrix();
120 for(Int_t i=0;i<3;i++)
121 {
122 for(Int_t j=0;j<3;j++)
123 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
124 }
125 fMatrixCopy.Invert();
126 //Int_t elements=fMatrixCopy.GetNoElements();
127 //printf("Elements:%d\n",elements);
128 //fMatrixOrig= (Double_t*) fMatrixCopy;
129 Localpos[0] = pos[0] - fChamberTrans[0];
130 Localpos[1] = pos[1] - fChamberTrans[1];
131 Localpos[2] = pos[2] - fChamberTrans[2];
132 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
133 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
134 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
135 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
136 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
137 //Localpos[0]-=fChamberTrans[0];
138 //Localpos[1]-=fChamberTrans[1];
139 //Localpos[2]-=fChamberTrans[2];
140}
141
142
143void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
176a9917 144 Int_t& nnew,Float_t newclust[5][500],ResponseType res)
2e5f0f7b 145{
146//
147// Generates pad hits (simulated cluster)
148// using the segmentation and the response model
149
150 Float_t dx, dy;
151 Float_t local[3];
152 //Float_t source[3];
153 Float_t global[3];
154 //
155 // Width of the integration area
156 //
157 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
158 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
159 //
160 // Get pulse height from energy loss and generate feedback photons
161 Float_t qtot=0;
162
163 local[0]=xhit;
164 // z-position of the wires relative to the RICH mother volume
165 // (2 mmm before CsI) old value: 6.076
64cdfc12 166 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
2e5f0f7b 167 //printf("AliRICHChamber feedback origin:%f",local[1]);
168 local[2]=yhit;
169
170 LocaltoGlobal(local,global);
171
237c933d 172 Int_t nFp=0;
2e5f0f7b 173
237c933d 174 if (res==kMip) {
2e5f0f7b 175 qtot = fResponse->IntPH(eloss);
237c933d 176 nFp = fResponse->FeedBackPhotons(global,qtot);
177 } else if (res==kCerenkov) {
2e5f0f7b 178 qtot = fResponse->IntPH();
237c933d 179 nFp = fResponse->FeedBackPhotons(global,qtot);
2e5f0f7b 180 }
181
237c933d 182 //printf("Feedbacks:%d\n",nFp);
2e5f0f7b 183
184 //
185 // Loop Over Pads
186
187 Float_t qcheck=0, qp=0;
188
189 nnew=0;
190 for (Int_t i=1; i<=fnsec; i++) {
191 qcheck=0;
a2f7eaf6 192 for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
2e5f0f7b 193 fSegmentation->MorePads();
194 fSegmentation->NextPad())
195 {
196 qp= fResponse->IntXY(fSegmentation);
197 qp= TMath::Abs(qp);
198
199 //printf("Qp:%f\n",qp);
200
201 if (qp > 1.e-4) {
202 qcheck+=qp;
203 //
204 // --- store signal information
176a9917 205 newclust[0][nnew]=qp*qtot;
2e5f0f7b 206 newclust[1][nnew]=fSegmentation->Ix();
207 newclust[2][nnew]=fSegmentation->Iy();
176a9917 208 newclust[3][nnew]=fSegmentation->ISector();
2e5f0f7b 209 nnew++;
210 //printf("Newcluster:%d\n",i);
211 }
212 } // Pad loop
213 } // Cathode plane loop
214 //if (fSegmentation->ISector()==2)
215 //printf("Nnew:%d\n\n\n\n",nnew);
216}
217
218
237c933d 219AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
220{
221// Assignment operator
222 return *this;
223
224}
2e5f0f7b 225
226
4faf338d 227void AliRICHChamber::GenerateTresholds()
228{
229
230// Generates random treshold charges for all pads
231
232 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
233
234 Int_t nx = fSegmentation->Npx();
235 Int_t ny = fSegmentation->Npy();
236
237 //Int_t size=nx*ny;
238
239 //printf("Size:%d\n",size);
240
241 fTresh = new AliRICHTresholdMap(fSegmentation);
242
243 //printf("Generating tresholds...\n");
244
245 for(Int_t i=-nx/2;i<nx/2;i++)
246 {
247 for(Int_t j=-ny/2;j<ny/2;j++)
248 {
249 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
250 //Int_t pedestal =0;
251 fTresh->SetHit(i,j,pedestal);
252 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);
253 }
254 }
255
256}