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1 | //$Id$ |
2 | |
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3 | // Author: Anders Vestbo <mailto:vestbo@fi.uib.no> |
4 | //*-- Copyright © ASV |
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5 | |
6 | #include <iostream.h> |
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7 | #include <math.h> |
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8 | #include "AliL3Logging.h" |
9 | #include "AliL3ClustFinderNew.h" |
10 | #include "AliL3DigitData.h" |
11 | #include "AliL3Transform.h" |
12 | #include "AliL3SpacePointData.h" |
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13 | #include "AliL3MemHandler.h" |
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14 | |
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15 | /** \class AliL3ClustFinderNew |
16 | //<pre> |
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17 | //_____________________________________________________________ |
18 | // AliL3ClustFinderNew |
19 | // |
20 | // The current cluster finder for HLT |
21 | // Based on STAR L3 |
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22 | //</pre> */ |
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23 | |
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24 | ClassImp(AliL3ClustFinderNew) |
25 | |
26 | AliL3ClustFinderNew::AliL3ClustFinderNew() |
27 | { |
28 | fMatch = 4; |
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29 | fThreshold = 10; |
30 | fXYErr = 0.2; |
31 | fZErr = 0.3; |
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32 | fDeconvPad = kTRUE; |
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33 | fDeconvTime = kTRUE; |
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34 | fstdout = kFALSE; |
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35 | fcalcerr = kTRUE; |
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36 | } |
37 | |
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38 | AliL3ClustFinderNew::~AliL3ClustFinderNew() |
39 | { |
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40 | } |
41 | |
42 | void AliL3ClustFinderNew::InitSlice(Int_t slice,Int_t patch,Int_t firstrow, Int_t lastrow,Int_t nmaxpoints) |
43 | { |
44 | fNClusters = 0; |
45 | fMaxNClusters = nmaxpoints; |
46 | fCurrentSlice = slice; |
47 | fCurrentPatch = patch; |
48 | fFirstRow = firstrow; |
49 | fLastRow = lastrow; |
50 | } |
51 | |
52 | void AliL3ClustFinderNew::InitSlice(Int_t slice,Int_t patch,Int_t nmaxpoints) |
53 | { |
54 | fNClusters = 0; |
55 | fMaxNClusters = nmaxpoints; |
56 | fCurrentSlice = slice; |
57 | fCurrentPatch = patch; |
58 | } |
59 | |
60 | void AliL3ClustFinderNew::SetOutputArray(AliL3SpacePointData *pt) |
61 | { |
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62 | fSpacePointData = pt; |
63 | } |
64 | |
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65 | void AliL3ClustFinderNew::Read(UInt_t ndigits,AliL3DigitRowData *ptr) |
66 | { |
67 | fNDigitRowData = ndigits; |
68 | fDigitRowData = ptr; |
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69 | } |
70 | |
71 | void AliL3ClustFinderNew::ProcessDigits() |
72 | { |
73 | //Loop over rows, and call processrow |
74 | |
75 | |
76 | AliL3DigitRowData *tempPt = (AliL3DigitRowData*)fDigitRowData; |
77 | |
78 | for(Int_t i=fFirstRow; i<=fLastRow; i++) |
79 | { |
80 | fCurrentRow = i; |
81 | ProcessRow(tempPt); |
82 | Byte_t *tmp = (Byte_t*)tempPt; |
83 | Int_t size = sizeof(AliL3DigitRowData) + tempPt->fNDigit*sizeof(AliL3DigitData); |
84 | tmp += size; |
85 | tempPt = (AliL3DigitRowData*)tmp; |
86 | } |
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87 | LOG(AliL3Log::kInformational,"AliL3ClustFinderNew::WriteClusters","Space points") |
88 | <<"Cluster finder found "<<fNClusters<<" clusters in slice "<<fCurrentSlice |
89 | <<" patch "<<fCurrentPatch<<ENDLOG; |
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90 | } |
91 | |
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92 | void AliL3ClustFinderNew::ProcessRow(AliL3DigitRowData *tempPt) |
93 | { |
94 | |
95 | UInt_t last_pad = 123456789; |
96 | |
97 | ClusterData *pad1[2500]; //2 lists for internal memory=2pads |
98 | ClusterData *pad2[2500]; //2 lists for internal memory=2pads |
99 | ClusterData clusterlist[5000]; //Clusterlist |
100 | |
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101 | ClusterData **currentPt; //List of pointers to the current pad |
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102 | ClusterData **previousPt; //List of pointers to the previous pad |
103 | currentPt = pad2; |
104 | previousPt = pad1; |
105 | UInt_t n_previous=0,n_current=0,n_total=0; |
106 | |
107 | //Loop over sequences of this row: |
108 | for(UInt_t bin=0; bin<tempPt->fNDigit; bin++) |
109 | { |
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110 | AliL3DigitData *data = tempPt->fDigitData; |
111 | if(data[bin].fPad != last_pad) |
112 | { |
113 | //This is a new pad |
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114 | |
115 | //Switch: |
116 | if(currentPt == pad2) |
117 | { |
118 | currentPt = pad1; |
119 | previousPt = pad2; |
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120 | } |
121 | else |
122 | { |
123 | currentPt = pad2; |
124 | previousPt = pad1; |
125 | } |
126 | n_previous = n_current; |
127 | n_current = 0; |
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128 | if(bin[data].fPad != last_pad+1) |
129 | { |
130 | //this happens if there is a pad with no signal. |
131 | n_previous = n_current = 0; |
132 | } |
133 | last_pad = data[bin].fPad; |
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134 | } |
135 | |
136 | Bool_t new_cluster = kTRUE; |
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137 | UInt_t seq_charge=0,seq_average=0,seq_error=0; |
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138 | UInt_t last_charge=0,last_was_falling=0; |
139 | Int_t new_bin=-1; |
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140 | |
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141 | if(fDeconvTime) |
142 | { |
143 | redo: //This is a goto. |
144 | if(new_bin > -1) |
145 | { |
146 | bin = new_bin; |
147 | new_bin = -1; |
148 | } |
149 | |
150 | last_charge=0; |
151 | last_was_falling = 0; |
152 | } |
153 | |
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154 | while(1) //Loop over current sequence |
155 | { |
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156 | if(data[bin].fTime >= AliL3Transform::GetNTimeBins()) |
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157 | { |
158 | LOG(AliL3Log::kFatal,"AliL3ClustFinderNew::ProcessRow","Digits") |
159 | <<"Timebin out of range "<<(Int_t)data[bin].fTime<<ENDLOG; |
160 | break; |
161 | } |
162 | |
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163 | //Get the current ADC-value |
164 | UInt_t charge = data[bin].fCharge; |
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165 | |
166 | if(fDeconvTime) |
167 | { |
168 | //Check if the last pixel in the sequence is smaller than this |
169 | if(charge > last_charge) |
170 | { |
171 | if(last_was_falling) |
172 | { |
173 | new_bin = bin; |
174 | break; |
175 | } |
176 | } |
177 | else last_was_falling = 1; //last pixel was larger than this |
178 | last_charge = charge; |
179 | } |
180 | |
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181 | //Sum the total charge of this sequence |
182 | seq_charge += charge; |
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183 | seq_average += data[bin].fTime*charge; |
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184 | seq_error += data[bin].fTime*data[bin].fTime*charge; |
185 | |
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186 | //Check where to stop: |
187 | if(data[bin+1].fPad != data[bin].fPad) //new pad |
188 | break; |
189 | if(data[bin+1].fTime != data[bin].fTime+1) //end of sequence |
190 | break; |
191 | |
192 | bin++; |
193 | }//end loop over sequence |
194 | |
195 | //Calculate mean of sequence: |
196 | Int_t seq_mean=0; |
197 | if(seq_charge) |
198 | seq_mean = seq_average/seq_charge; |
199 | else |
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200 | { |
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201 | LOG(AliL3Log::kFatal,"AliL3ClustFinderNew::ProcessRow","Data") |
202 | <<"Error in data given to the cluster finder"<<ENDLOG; |
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203 | seq_mean = 1; |
204 | seq_charge = 1; |
205 | } |
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206 | |
207 | //Calculate mean in pad direction: |
208 | Int_t pad_mean = seq_charge*data[bin].fPad; |
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209 | Int_t pad_error = data[bin].fPad*pad_mean; |
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210 | |
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211 | //Compare with results on previous pad: |
212 | for(UInt_t p=0; p<n_previous; p++) |
213 | { |
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214 | //dont merge sequences on the same pad twice |
215 | if(previousPt[p]->fLastMergedPad==data[bin].fPad) continue; |
216 | |
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217 | Int_t difference = seq_mean - previousPt[p]->fMean; |
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218 | if(difference < -fMatch) break; |
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219 | |
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220 | if(difference <= fMatch) //There is a match here!! |
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221 | { |
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222 | ClusterData *local = previousPt[p]; |
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223 | |
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224 | if(fDeconvPad) |
225 | { |
226 | if(seq_charge > local->fLastCharge) |
227 | { |
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228 | if(local->fChargeFalling) //The previous pad was falling |
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229 | { |
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230 | break; //create a new cluster |
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231 | } |
232 | } |
233 | else |
234 | local->fChargeFalling = 1; |
235 | local->fLastCharge = seq_charge; |
236 | } |
237 | |
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238 | //Don't create a new cluster, because we found a match |
239 | new_cluster = kFALSE; |
240 | |
241 | //Update cluster on current pad with the matching one: |
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242 | local->fTotalCharge += seq_charge; |
243 | local->fPad += pad_mean; |
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244 | local->fPad2 += pad_error; |
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245 | local->fTime += seq_average; |
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246 | local->fTime2 += seq_error; |
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247 | local->fMean = seq_mean; |
248 | local->fFlags++; //means we have more than one pad |
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249 | local->fLastMergedPad = data[bin].fPad; |
250 | |
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251 | currentPt[n_current] = local; |
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252 | n_current++; |
253 | |
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254 | break; |
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255 | } //Checking for match at previous pad |
256 | } //Loop over results on previous pad. |
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257 | |
258 | if(new_cluster) |
259 | { |
260 | //Start a new cluster. Add it to the clusterlist, and update |
261 | //the list of pointers to clusters in current pad. |
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262 | //current pad will be previous pad on next pad. |
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263 | |
264 | //Add to the clusterlist: |
265 | ClusterData *tmp = &clusterlist[n_total]; |
266 | tmp->fTotalCharge = seq_charge; |
267 | tmp->fPad = pad_mean; |
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268 | tmp->fPad2 = pad_error; |
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269 | tmp->fTime = seq_average; |
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270 | tmp->fTime2 = seq_error; |
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271 | tmp->fMean = seq_mean; |
272 | tmp->fFlags = 0; //flags for 1 pad clusters |
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273 | tmp->fLastMergedPad = data[bin].fPad; |
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274 | if(fDeconvPad) |
275 | { |
276 | tmp->fChargeFalling = 0; |
277 | tmp->fLastCharge = seq_charge; |
278 | } |
279 | |
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280 | //Update list of pointers to previous pad: |
281 | currentPt[n_current] = &clusterlist[n_total]; |
282 | n_total++; |
283 | n_current++; |
284 | } |
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285 | |
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286 | if(fDeconvTime) |
287 | if(new_bin >= 0) goto redo; |
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288 | }//Loop over digits on this padrow |
289 | |
290 | WriteClusters(n_total,clusterlist); |
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291 | } |
292 | |
293 | void AliL3ClustFinderNew::WriteClusters(Int_t n_clusters,ClusterData *list) |
294 | { |
295 | Int_t thisrow,thissector; |
296 | UInt_t counter = fNClusters; |
297 | |
298 | for(int j=0; j<n_clusters; j++) |
299 | { |
300 | if(!list[j].fFlags) continue; //discard 1 pad clusters |
301 | if(list[j].fTotalCharge < fThreshold) continue; //noise cluster |
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302 | |
303 | Float_t xyz[3]; |
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304 | Float_t fpad =(Float_t)list[j].fPad /(Float_t)list[j].fTotalCharge; |
305 | Float_t fpad2=fXYErr; |
306 | Float_t ftime =(Float_t)list[j].fTime /(Float_t)list[j].fTotalCharge; |
307 | Float_t ftime2=fZErr; |
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308 | |
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309 | if(fcalcerr) { |
310 | fpad2=(Float_t)list[j].fPad2/(Float_t)list[j].fTotalCharge - fpad*fpad; |
311 | fpad2 = sqrt(fpad2); |
312 | ftime2=(Float_t)list[j].fTime2/(Float_t)list[j].fTotalCharge - ftime*ftime; |
313 | ftime2 = sqrt(ftime2); |
314 | } |
315 | |
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316 | if(fstdout==kTRUE) |
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317 | cout<<"WriteCluster: padrow "<<fCurrentRow<<" pad "<<fpad << " +- "<<fpad2<<" time "<<ftime<<" +- "<<ftime2<<" charge "<<list[j].fTotalCharge<<endl; |
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318 | |
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319 | AliL3Transform::Slice2Sector(fCurrentSlice,fCurrentRow,thissector,thisrow); |
320 | AliL3Transform::Raw2Local(xyz,thissector,thisrow,fpad,ftime); |
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321 | if(xyz[0]==0) LOG(AliL3Log::kError,"AliL3ClustFinder","Cluster Finder") |
322 | <<AliL3Log::kDec<<"Zero cluster"<<ENDLOG; |
323 | if(fNClusters >= fMaxNClusters) |
324 | { |
325 | LOG(AliL3Log::kError,"AliL3ClustFinder::WriteClusters","Cluster Finder") |
326 | <<AliL3Log::kDec<<"Too many clusters"<<ENDLOG; |
327 | return; |
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328 | } |
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329 | fSpacePointData[counter].fCharge = list[j].fTotalCharge; |
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330 | fSpacePointData[counter].fX = xyz[0]; |
331 | fSpacePointData[counter].fY = xyz[1]; |
332 | fSpacePointData[counter].fZ = xyz[2]; |
333 | fSpacePointData[counter].fPadRow = fCurrentRow; |
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334 | fSpacePointData[counter].fXYErr = fpad2; |
335 | fSpacePointData[counter].fZErr = ftime2; |
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336 | fSpacePointData[counter].fID = counter |
d3b44290 |
337 | +((fCurrentSlice&0x7f)<<25)+((fCurrentPatch&0x7)<<22);//Uli |
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338 | #ifdef do_mc |
339 | Int_t trackID[3]; |
340 | GetTrackID((Int_t)rint(fpad),(Int_t)rint(ftime),trackID); |
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341 | //cout<<"padrow "<<fCurrentRow<<" pad "<<(Int_t)rint(fpad)<<" time "<<(Int_t)rint(ftime)<<" Trackid "<<trackID[0]<<endl; |
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342 | fSpacePointData[counter].fTrackID[0] = trackID[0]; |
343 | fSpacePointData[counter].fTrackID[1] = trackID[1]; |
344 | fSpacePointData[counter].fTrackID[2] = trackID[2]; |
345 | #endif |
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346 | fNClusters++; |
347 | counter++; |
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348 | } |
46fbeb8a |
349 | } |
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350 | |
351 | #ifdef do_mc |
352 | void AliL3ClustFinderNew::GetTrackID(Int_t pad,Int_t time,Int_t *trackID) |
353 | { |
354 | AliL3DigitRowData *rowPt = (AliL3DigitRowData*)fDigitRowData; |
355 | |
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356 | trackID[0]=trackID[1]=trackID[2]=-2; |
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357 | //cout<<"Looking for pad "<<pad<<" time "<<time<<endl; |
358 | for(Int_t i=fFirstRow; i<=fLastRow; i++) |
359 | { |
360 | if(rowPt->fRow < (UInt_t)fCurrentRow) |
361 | { |
362 | AliL3MemHandler::UpdateRowPointer(rowPt); |
363 | continue; |
364 | } |
365 | AliL3DigitData *digPt = (AliL3DigitData*)rowPt->fDigitData; |
366 | for(UInt_t j=0; j<rowPt->fNDigit; j++) |
367 | { |
368 | Int_t cpad = digPt[j].fPad; |
369 | Int_t ctime = digPt[j].fTime; |
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370 | if(cpad != pad) continue; |
371 | if(ctime != time) continue; |
372 | //if(cpad != pad && ctime != ctime) continue; |
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373 | //cout<<"Reading row "<<fCurrentRow<<" pad "<<cpad<<" time "<<ctime<<" trackID "<<digPt[j].fTrackID[0]<<endl; |
374 | trackID[0] = digPt[j].fTrackID[0]; |
375 | trackID[1] = digPt[j].fTrackID[1]; |
376 | trackID[2] = digPt[j].fTrackID[2]; |
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377 | break; |
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378 | //cout<<"Reading trackID "<<trackID[0]<<endl; |
379 | } |
380 | break; |
381 | } |
382 | |
383 | } |
384 | #endif |