Pointers initialised to 0 in the default constructor
[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 $Log$
b577b475 18 Revision 1.10 2001/02/23 17:21:17 jbarbosa
19 Re-definition of IntPH() to accomodate for wire sag effect.
20
733b4fa4 21 Revision 1.9 2001/02/13 20:15:34 jbarbosa
22 Removed fNsec (number of cathodes - obsolete) related loops and calls.
23
f73582a8 24 Revision 1.8 2000/12/18 17:45:43 jbarbosa
25 Cleaned up PadHits object.
26
176a9917 27 Revision 1.7 2000/10/03 21:44:09 morsch
28 Use AliSegmentation and AliHit abstract base classes.
29
a2f7eaf6 30 Revision 1.6 2000/10/02 15:44:37 jbarbosa
31 Fixed forward declarations.
32
488e98ba 33 Revision 1.5 2000/07/13 16:19:45 fca
34 Mainly coding conventions + some small bug fixes
35
ef42d733 36 Revision 1.4 2000/06/30 16:48:58 dibari
37 New function GenerateTresholds() for pedestal simulation.
38
4faf338d 39 Revision 1.3 2000/06/12 15:17:58 jbarbosa
40 Cleaned up version.
41
237c933d 42 Revision 1.2 2000/05/18 13:45:57 jbarbosa
43 Fixed feedback photon origin coordinates
44
64cdfc12 45 Revision 1.1 2000/04/19 12:57:20 morsch
46 Newly structured and updated version (JB, AM)
47
2e5f0f7b 48*/
49
50
51#include "AliRICHChamber.h"
237c933d 52
2e5f0f7b 53#include <TLorentzVector.h>
54#include <TParticle.h>
55#include <TRandom.h>
488e98ba 56#include <TObjArray.h>
57#include <TRotMatrix.h>
58#include <AliRICHTresholdMap.h>
a2f7eaf6 59#include <AliSegmentation.h>
733b4fa4 60#include <AliRICHSegmentationV0.h>
488e98ba 61#include <AliRICHGeometry.h>
62#include <AliRICHResponse.h>
2e5f0f7b 63
64ClassImp(AliRICHChamber)
65
66AliRICHChamber::AliRICHChamber()
67{
237c933d 68
69//
70// Chamber object constructor
71
2e5f0f7b 72 fSegmentation = 0;
4faf338d 73 fResponse = 0;
74 fGeometry = 0;
75 fTresh = 0;
76 frMin = 0.1;
77 frMax = 140;
ef42d733 78 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
2e5f0f7b 79}
80
237c933d 81AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
82{
83// Copy Constructor
84}
85
86
2e5f0f7b 87AliRICHResponse* AliRICHChamber::GetResponseModel()
88{
237c933d 89//
90// Get reference to response model
2e5f0f7b 91 return fResponse;
92}
93
2e5f0f7b 94void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
95{
237c933d 96// Configure response model
2e5f0f7b 97 fResponse=thisResponse;
98}
99
a2f7eaf6 100void AliRICHChamber::Init(Int_t id)
2e5f0f7b 101{
237c933d 102// Initialise chambers
a2f7eaf6 103 fSegmentation->Init(id);
2e5f0f7b 104}
105
106void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
107{
108
237c933d 109// Local coordinates to global coordinates transformation
110
2e5f0f7b 111 Double_t *fMatrix;
112 fMatrix = fChamberMatrix->GetMatrix();
113 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
114 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
115 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
116 Globalpos[0]+=fChamberTrans[0];
117 Globalpos[1]+=fChamberTrans[1];
118 Globalpos[2]+=fChamberTrans[2];
119}
120
121void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
122{
123
237c933d 124// Global coordinates to local coordinates transformation
125
2e5f0f7b 126 Double_t *fMatrixOrig;
127 TMatrix fMatrixCopy(3,3);
128 fMatrixOrig = fChamberMatrix->GetMatrix();
129 for(Int_t i=0;i<3;i++)
130 {
131 for(Int_t j=0;j<3;j++)
132 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
133 }
134 fMatrixCopy.Invert();
135 //Int_t elements=fMatrixCopy.GetNoElements();
136 //printf("Elements:%d\n",elements);
137 //fMatrixOrig= (Double_t*) fMatrixCopy;
138 Localpos[0] = pos[0] - fChamberTrans[0];
139 Localpos[1] = pos[1] - fChamberTrans[1];
140 Localpos[2] = pos[2] - fChamberTrans[2];
141 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
142 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
143 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
144 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
145 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
146 //Localpos[0]-=fChamberTrans[0];
147 //Localpos[1]-=fChamberTrans[1];
148 //Localpos[2]-=fChamberTrans[2];
149}
150
151
152void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
176a9917 153 Int_t& nnew,Float_t newclust[5][500],ResponseType res)
2e5f0f7b 154{
155//
156// Generates pad hits (simulated cluster)
157// using the segmentation and the response model
158
159 Float_t dx, dy;
160 Float_t local[3];
161 //Float_t source[3];
162 Float_t global[3];
163 //
164 // Width of the integration area
165 //
166 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
167 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
168 //
169 // Get pulse height from energy loss and generate feedback photons
170 Float_t qtot=0;
171
172 local[0]=xhit;
173 // z-position of the wires relative to the RICH mother volume
174 // (2 mmm before CsI) old value: 6.076
64cdfc12 175 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
2e5f0f7b 176 //printf("AliRICHChamber feedback origin:%f",local[1]);
177 local[2]=yhit;
178
179 LocaltoGlobal(local,global);
180
237c933d 181 Int_t nFp=0;
2e5f0f7b 182
733b4fa4 183
184 // To calculate wire sag, the origin of y-position must be the middle of the photcathode
185 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
186 Float_t newy;
187 if (yhit>0)
188 newy = yhit - segmentation->GetPadPlaneLength()/2;
189 else
190 newy = yhit + segmentation->GetPadPlaneLength()/2;
191
237c933d 192 if (res==kMip) {
733b4fa4 193 qtot = fResponse->IntPH(eloss, newy);
237c933d 194 nFp = fResponse->FeedBackPhotons(global,qtot);
b577b475 195 //printf("feedbacks:%d\n",nFp);
237c933d 196 } else if (res==kCerenkov) {
733b4fa4 197 qtot = fResponse->IntPH(newy);
237c933d 198 nFp = fResponse->FeedBackPhotons(global,qtot);
b577b475 199 //printf("feedbacks:%d\n",nFp);
2e5f0f7b 200 }
201
237c933d 202 //printf("Feedbacks:%d\n",nFp);
2e5f0f7b 203
204 //
205 // Loop Over Pads
206
207 Float_t qcheck=0, qp=0;
208
209 nnew=0;
f73582a8 210 for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
211 fSegmentation->MorePads();
212 fSegmentation->NextPad())
213 {
214 qp= fResponse->IntXY(fSegmentation);
215 qp= TMath::Abs(qp);
216
733b4fa4 217 //printf("Qp:%f Qtot %f\n",qp,qtot);
f73582a8 218
219 if (qp > 1.e-4) {
220 qcheck+=qp;
221 //
222 // --- store signal information
223 newclust[0][nnew]=qp*qtot;
224 newclust[1][nnew]=fSegmentation->Ix();
225 newclust[2][nnew]=fSegmentation->Iy();
226 newclust[3][nnew]=fSegmentation->ISector();
227 nnew++;
228 //printf("Newcluster:%d\n",i);
229 }
230 } // Pad loop
2e5f0f7b 231 //if (fSegmentation->ISector()==2)
232 //printf("Nnew:%d\n\n\n\n",nnew);
233}
234
235
237c933d 236AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
237{
238// Assignment operator
239 return *this;
240
241}
2e5f0f7b 242
243
4faf338d 244void AliRICHChamber::GenerateTresholds()
245{
246
247// Generates random treshold charges for all pads
248
249 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
250
251 Int_t nx = fSegmentation->Npx();
252 Int_t ny = fSegmentation->Npy();
253
254 //Int_t size=nx*ny;
255
256 //printf("Size:%d\n",size);
257
258 fTresh = new AliRICHTresholdMap(fSegmentation);
259
260 //printf("Generating tresholds...\n");
261
262 for(Int_t i=-nx/2;i<nx/2;i++)
263 {
264 for(Int_t j=-ny/2;j<ny/2;j++)
265 {
266 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
267 //Int_t pedestal =0;
268 fTresh->SetHit(i,j,pedestal);
269 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);
270 }
271 }
272
273}