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f7336fa3 | 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 | $Log$ | |
3e1a3ad8 | 18 | Revision 1.7 2001/02/14 18:22:26 cblume |
19 | Change in the geometry of the padplane | |
20 | ||
71d9fa7b | 21 | Revision 1.6 2000/11/01 14:53:20 cblume |
22 | Merge with TRD-develop | |
23 | ||
793ff80c | 24 | Revision 1.1.4.6 2000/10/16 01:16:53 cblume |
25 | Changed timebin 0 to be the one closest to the readout | |
26 | ||
27 | Revision 1.1.4.5 2000/10/15 23:40:01 cblume | |
28 | Remove AliTRDconst | |
29 | ||
30 | Revision 1.1.4.4 2000/10/06 16:49:46 cblume | |
31 | Made Getters const | |
32 | ||
33 | Revision 1.1.4.3 2000/10/04 16:34:58 cblume | |
34 | Replace include files by forward declarations | |
35 | ||
36 | Revision 1.1.4.2 2000/09/22 14:49:49 cblume | |
37 | Adapted to tracking code | |
38 | ||
39 | Revision 1.5 2000/10/02 21:28:19 fca | |
40 | Removal of useless dependecies via forward declarations | |
41 | ||
42 | Revision 1.4 2000/06/08 18:32:58 cblume | |
43 | Make code compliant to coding conventions | |
44 | ||
45 | Revision 1.3 2000/06/07 16:27:01 cblume | |
46 | Try to remove compiler warnings on Sun and HP | |
47 | ||
48 | Revision 1.2 2000/05/08 16:17:27 cblume | |
49 | Merge TRD-develop | |
50 | ||
51 | Revision 1.1.4.1 2000/05/08 15:08:41 cblume | |
52 | Replace AliTRDcluster by AliTRDrecPoint | |
53 | ||
94de3818 | 54 | Revision 1.4 2000/06/08 18:32:58 cblume |
55 | Make code compliant to coding conventions | |
56 | ||
8230f242 | 57 | Revision 1.3 2000/06/07 16:27:01 cblume |
58 | Try to remove compiler warnings on Sun and HP | |
59 | ||
9d0b222b | 60 | Revision 1.2 2000/05/08 16:17:27 cblume |
61 | Merge TRD-develop | |
62 | ||
6f1e466d | 63 | Revision 1.1.4.1 2000/05/08 15:08:41 cblume |
64 | Replace AliTRDcluster by AliTRDrecPoint | |
65 | ||
66 | Revision 1.1 2000/02/28 18:58:33 cblume | |
67 | Add new TRD classes | |
68 | ||
f7336fa3 | 69 | */ |
70 | ||
71 | /////////////////////////////////////////////////////////////////////////////// | |
72 | // // | |
73 | // TRD cluster finder for the fast simulator. It takes the hits from the // | |
74 | // fast simulator (one hit per plane) and transforms them // | |
75 | // into cluster, by applying position smearing and merging // | |
76 | // of nearby cluster. The searing is done uniformly in z-direction // | |
77 | // over the length of a readout pad. In rphi-direction a Gaussian // | |
78 | // smearing is applied with a sigma given by fRphiSigma. // | |
79 | // Clusters are considered as overlapping when they are closer in // | |
80 | // rphi-direction than the value defined in fRphiDist. // | |
81 | // Use the macro fastClusterCreate.C to create the cluster. // | |
82 | // // | |
83 | /////////////////////////////////////////////////////////////////////////////// | |
84 | ||
85 | #include <TRandom.h> | |
94de3818 | 86 | #include <TTree.h> |
793ff80c | 87 | |
88 | #include "AliRun.h" | |
f7336fa3 | 89 | |
793ff80c | 90 | #include "AliTRD.h" |
f7336fa3 | 91 | #include "AliTRDclusterizerV0.h" |
793ff80c | 92 | #include "AliTRDhit.h" |
f7336fa3 | 93 | #include "AliTRDgeometry.h" |
94 | #include "AliTRDrecPoint.h" | |
95 | ||
96 | ClassImp(AliTRDclusterizerV0) | |
97 | ||
98 | //_____________________________________________________________________________ | |
99 | AliTRDclusterizerV0::AliTRDclusterizerV0():AliTRDclusterizer() | |
100 | { | |
101 | // | |
102 | // AliTRDclusterizerV0 default constructor | |
103 | // | |
104 | ||
105 | } | |
106 | ||
107 | //_____________________________________________________________________________ | |
108 | AliTRDclusterizerV0::AliTRDclusterizerV0(const Text_t* name, const Text_t* title) | |
109 | :AliTRDclusterizer(name,title) | |
110 | { | |
111 | // | |
112 | // AliTRDclusterizerV0 default constructor | |
113 | // | |
114 | ||
115 | Init(); | |
116 | ||
117 | } | |
118 | ||
119 | //_____________________________________________________________________________ | |
120 | AliTRDclusterizerV0::~AliTRDclusterizerV0() | |
121 | { | |
8230f242 | 122 | // |
123 | // AliTRDclusterizerV0 destructor | |
124 | // | |
f7336fa3 | 125 | |
126 | } | |
127 | ||
128 | //_____________________________________________________________________________ | |
129 | void AliTRDclusterizerV0::Init() | |
130 | { | |
131 | // | |
132 | // Initializes the cluster finder | |
133 | // | |
134 | ||
135 | // Position resolution in rphi-direction | |
136 | fRphiSigma = 0.02; | |
137 | // Minimum distance of non-overlapping cluster | |
138 | fRphiDist = 1.0; | |
139 | ||
140 | } | |
141 | ||
142 | //_____________________________________________________________________________ | |
793ff80c | 143 | Bool_t AliTRDclusterizerV0::MakeClusters() |
f7336fa3 | 144 | { |
145 | // | |
146 | // Generates the cluster | |
147 | // | |
148 | ||
3e1a3ad8 | 149 | if (fTRD->IsVersion() != 0) { |
f7336fa3 | 150 | printf("AliTRDclusterizerV0::MakeCluster -- "); |
151 | printf("TRD must be version 0 (fast simulator).\n"); | |
152 | return kFALSE; | |
153 | } | |
154 | ||
155 | // Get the geometry | |
3e1a3ad8 | 156 | AliTRDgeometry *geo = fTRD->GetGeometry(); |
f7336fa3 | 157 | |
158 | printf("AliTRDclusterizerV0::MakeCluster -- "); | |
159 | printf("Start creating cluster.\n"); | |
160 | ||
161 | Int_t nBytes = 0; | |
162 | ||
8230f242 | 163 | AliTRDhit *hit; |
f7336fa3 | 164 | |
165 | // Get the pointer to the hit tree | |
8230f242 | 166 | TTree *hitTree = gAlice->TreeH(); |
f7336fa3 | 167 | // Get the pointer to the reconstruction tree |
8230f242 | 168 | TTree *clusterTree = gAlice->TreeR(); |
f7336fa3 | 169 | |
8230f242 | 170 | TObjArray *chamberArray = new TObjArray(); |
f7336fa3 | 171 | |
172 | // Get the number of entries in the hit tree | |
173 | // (Number of primary particles creating a hit somewhere) | |
8230f242 | 174 | Int_t nTrack = (Int_t) hitTree->GetEntries(); |
f7336fa3 | 175 | |
176 | // Loop through all the chambers | |
793ff80c | 177 | for (Int_t icham = 0; icham < AliTRDgeometry::Ncham(); icham++) { |
178 | for (Int_t iplan = 0; iplan < AliTRDgeometry::Nplan(); iplan++) { | |
179 | for (Int_t isect = 0; isect < AliTRDgeometry::Nsect(); isect++) { | |
f7336fa3 | 180 | |
8230f242 | 181 | Int_t nColMax = geo->GetColMax(iplan); |
182 | Float_t row0 = geo->GetRow0(iplan,icham,isect); | |
183 | Float_t col0 = geo->GetCol0(iplan); | |
184 | Float_t time0 = geo->GetTime0(iplan); | |
f7336fa3 | 185 | |
71d9fa7b | 186 | Float_t rowPadSize = geo->GetRowPadSize(iplan,icham,isect); |
187 | Float_t colPadSize = geo->GetColPadSize(iplan); | |
8230f242 | 188 | Float_t timeBinSize = geo->GetTimeBinSize(); |
f7336fa3 | 189 | |
190 | // Loop through all entries in the tree | |
191 | for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) { | |
192 | ||
193 | gAlice->ResetHits(); | |
8230f242 | 194 | nBytes += hitTree->GetEvent(iTrack); |
f7336fa3 | 195 | |
196 | // Get the number of hits in the TRD created by this particle | |
3e1a3ad8 | 197 | Int_t nHit = fTRD->Hits()->GetEntriesFast(); |
f7336fa3 | 198 | |
199 | // Loop through the TRD hits | |
200 | for (Int_t iHit = 0; iHit < nHit; iHit++) { | |
201 | ||
3e1a3ad8 | 202 | if (!(hit = (AliTRDhit *) fTRD->Hits()->UncheckedAt(iHit))) |
f7336fa3 | 203 | continue; |
204 | ||
205 | Float_t pos[3]; | |
94de3818 | 206 | pos[0] = hit->X(); |
207 | pos[1] = hit->Y(); | |
208 | pos[2] = hit->Z(); | |
209 | Int_t track = hit->Track(); | |
8230f242 | 210 | Int_t detector = hit->GetDetector(); |
211 | Int_t plane = geo->GetPlane(detector); | |
212 | Int_t sector = geo->GetSector(detector); | |
213 | Int_t chamber = geo->GetChamber(detector); | |
f7336fa3 | 214 | |
215 | if ((sector != isect) || | |
216 | (plane != iplan) || | |
217 | (chamber != icham)) | |
218 | continue; | |
219 | ||
220 | // Rotate the sectors on top of each other | |
221 | Float_t rot[3]; | |
8230f242 | 222 | geo->Rotate(detector,pos,rot); |
f7336fa3 | 223 | |
6f1e466d | 224 | // Add this recPoint to the temporary array for this chamber |
8230f242 | 225 | AliTRDrecPoint *recPoint = new AliTRDrecPoint(); |
226 | recPoint->SetLocalRow(rot[2]); | |
227 | recPoint->SetLocalCol(rot[1]); | |
228 | recPoint->SetLocalTime(rot[0]); | |
229 | recPoint->SetEnergy(0); | |
230 | recPoint->SetDetector(detector); | |
231 | recPoint->AddDigit(track); | |
232 | chamberArray->Add(recPoint); | |
f7336fa3 | 233 | |
234 | } | |
235 | ||
236 | } | |
237 | ||
238 | // Loop through the temporary cluster-array | |
8230f242 | 239 | for (Int_t iClus1 = 0; iClus1 < chamberArray->GetEntries(); iClus1++) { |
f7336fa3 | 240 | |
8230f242 | 241 | AliTRDrecPoint *recPoint1 = (AliTRDrecPoint *) |
242 | chamberArray->UncheckedAt(iClus1); | |
243 | Float_t row1 = recPoint1->GetLocalRow(); | |
244 | Float_t col1 = recPoint1->GetLocalCol(); | |
245 | Float_t time1 = recPoint1->GetLocalTime(); | |
f7336fa3 | 246 | |
8230f242 | 247 | if (recPoint1->GetEnergy() < 0) continue; // Skip marked cluster |
f7336fa3 | 248 | |
8230f242 | 249 | const Int_t kNsave = 5; |
250 | Int_t idxSave[kNsave]; | |
f7336fa3 | 251 | Int_t iSave = 0; |
252 | ||
8230f242 | 253 | const Int_t kNsaveTrack = 3; |
254 | Int_t tracks[kNsaveTrack]; | |
255 | tracks[0] = recPoint1->GetDigit(0); | |
f7336fa3 | 256 | |
257 | // Check the other cluster to see, whether there are close ones | |
8230f242 | 258 | for (Int_t iClus2 = iClus1 + 1; iClus2 < chamberArray->GetEntries(); iClus2++) { |
6f1e466d | 259 | |
8230f242 | 260 | AliTRDrecPoint *recPoint2 = (AliTRDrecPoint *) |
261 | chamberArray->UncheckedAt(iClus2); | |
262 | Float_t row2 = recPoint2->GetLocalRow(); | |
263 | Float_t col2 = recPoint2->GetLocalCol(); | |
6f1e466d | 264 | |
265 | if ((TMath::Abs(row1 - row2) < rowPadSize) || | |
266 | (TMath::Abs(col1 - col2) < fRphiDist)) { | |
8230f242 | 267 | if (iSave == kNsave) { |
f7336fa3 | 268 | printf("AliTRDclusterizerV0::MakeCluster -- "); |
8230f242 | 269 | printf("Boundary error: iSave = %d, kNsave = %d.\n" |
270 | ,iSave,kNsave); | |
f7336fa3 | 271 | } |
6f1e466d | 272 | else { |
f7336fa3 | 273 | idxSave[iSave] = iClus2; |
6f1e466d | 274 | iSave++; |
8230f242 | 275 | if (iSave < kNsaveTrack) tracks[iSave] = recPoint2->GetDigit(0); |
f7336fa3 | 276 | } |
f7336fa3 | 277 | } |
278 | } | |
279 | ||
280 | // Merge close cluster | |
6f1e466d | 281 | Float_t rowMerge = row1; |
282 | Float_t colMerge = col1; | |
f7336fa3 | 283 | if (iSave) { |
284 | for (Int_t iMerge = 0; iMerge < iSave; iMerge++) { | |
8230f242 | 285 | AliTRDrecPoint *recPoint2 = |
286 | (AliTRDrecPoint *) chamberArray->UncheckedAt(idxSave[iMerge]); | |
287 | rowMerge += recPoint2->GetLocalRow(); | |
288 | colMerge += recPoint2->GetLocalCol(); | |
289 | recPoint2->SetEnergy(-1); // Mark merged cluster | |
f7336fa3 | 290 | } |
6f1e466d | 291 | rowMerge /= (iSave + 1); |
292 | colMerge /= (iSave + 1); | |
f7336fa3 | 293 | } |
294 | ||
295 | Float_t smear[3]; | |
296 | ||
6f1e466d | 297 | // The position smearing in row-direction (uniform over pad width) |
298 | Int_t row = (Int_t) ((rowMerge - row0) / rowPadSize); | |
f7336fa3 | 299 | smear[0] = (row + gRandom->Rndm()) * rowPadSize + row0; |
300 | ||
301 | // The position smearing in rphi-direction (Gaussian) | |
302 | smear[1] = 0; | |
303 | do | |
6f1e466d | 304 | smear[1] = gRandom->Gaus(colMerge,fRphiSigma); |
f7336fa3 | 305 | while ((smear[1] < col0 ) || |
306 | (smear[1] > col0 + nColMax * colPadSize)); | |
307 | ||
308 | // Time direction stays unchanged | |
6f1e466d | 309 | smear[2] = time1; |
310 | ||
311 | // Transform into local coordinates | |
312 | smear[0] = (Int_t) ((smear[0] - row0) / rowPadSize); | |
313 | smear[1] = (Int_t) ((smear[1] - col0) / colPadSize); | |
793ff80c | 314 | smear[2] = (Int_t) ((time0 - smear[2]) / timeBinSize); |
f7336fa3 | 315 | |
316 | // Add the smeared cluster to the output array | |
8230f242 | 317 | Int_t detector = recPoint1->GetDetector(); |
f7336fa3 | 318 | Int_t digits[3] = {0}; |
793ff80c | 319 | Int_t tr[9] = {-1}; |
3e1a3ad8 | 320 | fTRD->AddCluster(smear,digits,detector,0.0,tr,0); |
f7336fa3 | 321 | |
322 | } | |
323 | ||
324 | // Clear the temporary cluster-array and delete the cluster | |
8230f242 | 325 | chamberArray->Delete(); |
f7336fa3 | 326 | |
327 | } | |
328 | } | |
329 | } | |
330 | ||
331 | printf("AliTRDclusterizerV0::MakeCluster -- "); | |
3e1a3ad8 | 332 | printf("Found %d points.\n",fTRD->RecPoints()->GetEntries()); |
f7336fa3 | 333 | printf("AliTRDclusterizerV0::MakeCluster -- "); |
334 | printf("Fill the cluster tree.\n"); | |
8230f242 | 335 | clusterTree->Fill(); |
f7336fa3 | 336 | |
337 | return kTRUE; | |
338 | ||
339 | } |