3 /**************************************************************************
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4 * This file is property of and copyright by the ALICE HLT Project *
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5 * All rights reserved. *
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7 * Primary Authors: Oystein Djuvsland *
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9 * Permission to use, copy, modify and distribute this software and its *
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10 * documentation strictly for non-commercial purposes is hereby granted *
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11 * without fee, provided that the above copyright notice appears in all *
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12 * copies and that both the copyright notice and this permission notice *
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13 * appear in the supporting documentation. The authors make no claims *
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14 * about the suitability of this software for any purpose. It is *
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15 * provided "as is" without express or implied warranty. *
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16 **************************************************************************/
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19 * @file AliHLTCaloClusterizer.cxx
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20 * @author Oystein Djuvsland
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22 * @brief Clusterizer for PHOS HLT
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25 // see header file for class documentation
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27 // refer to README to build package
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29 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
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31 #include "AliHLTCaloClusterizer.h"
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32 #include "AliHLTLogging.h"
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34 #include "AliHLTCaloRecPointDataStruct.h"
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35 #include "AliHLTCaloDigitDataStruct.h"
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36 #include "AliHLTCaloDigitContainerDataStruct.h"
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37 #include "AliHLTCaloConstantsHandler.h"
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39 ClassImp(AliHLTCaloClusterizer);
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41 AliHLTCaloClusterizer::AliHLTCaloClusterizer(TString det):
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42 AliHLTCaloConstantsHandler(det),
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44 fRecPointDataPtr(0),
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45 fFirstRecPointPtr(0),
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51 fEmcClusteringThreshold(0),
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52 fEmcMinEnergyThreshold(0),
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54 fDigitsInCluster(0),
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55 fDigitsPointerArray(0),
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56 fDigitContainerPtr(0),
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57 fMaxDigitIndexDiff(0),
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60 //See header file for documentation
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61 fEmcClusteringThreshold = 0.2;
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62 fEmcMinEnergyThreshold = 0.03;
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63 fEmcTimeGate = 1.e-6 ;
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65 fMaxDigitIndexDiff = 2*fCaloConstants->GetNZROWSMOD();
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69 fRecPointArray = new AliHLTCaloRecPointDataStruct*[fArraySize];
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71 fAvailableSize = sizeof(AliHLTCaloRecPointDataStruct) * 20;
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72 fRecPointDataPtr = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(new UChar_t[fAvailableSize]);
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73 fFirstRecPointPtr = fRecPointDataPtr;
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77 AliHLTCaloClusterizer::~AliHLTCaloClusterizer()
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79 //See header file for documentation
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83 AliHLTCaloClusterizer::SetRecPointDataPtr(AliHLTCaloRecPointDataStruct* recPointDataPtr)
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85 // See header file for documentation
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86 fRecPointDataPtr = recPointDataPtr;
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90 AliHLTCaloClusterizer::ClusterizeEvent(Int_t nDigits)
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92 //see header file for documentation
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93 Int_t nRecPoints = 0;
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97 fRecPointDataPtr = fFirstRecPointPtr;
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98 //Clusterization starts
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99 for(Int_t i = 0; i < nDigits; i++)
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101 fDigitsInCluster = 0;
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103 if(fDigitsPointerArray[i]->fEnergy < fEmcClusteringThreshold)
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110 // First digit is placed at the fDigits member variable in the recpoint
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111 fDigitIndexPtr = &(fRecPointDataPtr->fDigits);
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112 fUsedSize += sizeof(AliHLTCaloRecPointDataStruct);
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114 fRecPointDataPtr->fAmp = 0;
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115 fRecPointDataPtr->fModule = fDigitsPointerArray[i]->fModule;
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117 // Assigning the digit to this rec point
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118 fRecPointDataPtr->fDigits = i;
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119 fUsedSize += sizeof(AliHLTCaloRecPointDataStruct);
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121 // Incrementing the pointer to be ready for new entry
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124 fRecPointDataPtr->fAmp += fDigitsPointerArray[i]->fEnergy;
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125 fDigitsPointerArray[i]->fEnergy = 0;
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126 fDigitsInCluster++;
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129 // Scanning for the neighbours
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130 if(ScanForNeighbourDigits(i, fRecPointDataPtr) != 0)
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135 //fUsedSize += sizeof(AliHLTCaloRecPointDataStruct) + (fDigitsInCluster-1)*sizeof(AliHLTCaloDigitDataStruct);
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137 fRecPointDataPtr->fMultiplicity = fDigitsInCluster;
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138 fRecPointArray[fNRecPoints] = fRecPointDataPtr;
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140 fRecPointDataPtr = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(fDigitIndexPtr);
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144 }//end of clusterization
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150 AliHLTCaloClusterizer::ScanForNeighbourDigits(Int_t index, AliHLTCaloRecPointDataStruct* recPoint)
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152 //see header file for documentation
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153 Int_t max = TMath::Min(fNDigits, (Int_t)fMaxDigitIndexDiff+index);
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154 Int_t min = TMath::Max(0, (Int_t)(index - (Int_t)fMaxDigitIndexDiff));
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158 for(Int_t j = min; j < max; j++)
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160 if(fDigitsPointerArray[j]->fEnergy > fEmcMinEnergyThreshold)
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164 if(AreNeighbours(fDigitsPointerArray[index],
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165 fDigitsPointerArray[j]))
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167 // if((fAvailableSize - fUsedSize) < sizeof(Int_t))
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169 // UChar_t *tmp = new UChar_t[fAvailableSize*2];
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170 // memcpy(tmp, fRecPointDataPtr, fAvailableSize);
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171 // for(Int_t n = 0; n < fNRecPoints; n++)
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173 // fRecPointArray[n] = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(reinterpret_cast<UChar_t*>(fRecPointArray[n]) - reinterpret_cast<UChar_t*>(fFirstRecPointPtr) + reinterpret_cast<UChar_t*>(tmp));
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175 // fRecPointDataPtr = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(tmp);
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176 // fFirstRecPointPtr = fRecPointDataPtr;
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180 // Assigning index to digit
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181 *fDigitIndexPtr = j;
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182 fUsedSize += sizeof(Int_t);
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184 // Incrementing digit pointer to be ready for new entry
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187 recPoint->fAmp += fDigitsPointerArray[j]->fEnergy;
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188 fDigitsPointerArray[j]->fEnergy = 0;
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189 fDigitsInCluster++;
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190 ScanForNeighbourDigits(j, recPoint);
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199 AliHLTCaloClusterizer::AreNeighbours(AliHLTCaloDigitDataStruct* digit1,
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200 AliHLTCaloDigitDataStruct* digit2)
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202 //see header file for documentation
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203 if ( (digit1->fModule == digit2->fModule) /*&& (coord1[1]==coord2[1])*/ ) // inside the same PHOS module
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205 Int_t rowdiff = TMath::Abs( digit1->fZ - digit2->fZ );
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206 Int_t coldiff = TMath::Abs( digit1->fX - digit2->fX );
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207 if (( coldiff <= 1 && rowdiff == 0 ) || ( coldiff == 0 && rowdiff <= 1 ))
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209 // cout << "Are neighbours: digit (E = " << digit1->fEnergy << ") with x = " << digit1->fX << " and z = " << digit1->fZ <<
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210 // " is neighbour with digit (E = " << digit2->fEnergy << ") with x = " << digit2->fX << " and z = " << digit2->fZ << endl;
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212 if(TMath::Abs(digit1->fTime - digit2->fTime ) < fEmcTimeGate)
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218 /* Float_t rowdiff = TMath::Abs( digit1->fZ - digit2->fZ );
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219 Float_t coldiff = TMath::Abs( digit1->fX - digit2->fX );
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220 if (( coldiff <= 2.4 && rowdiff < 0.4 ) || ( coldiff < 0.4 && rowdiff <= 2.4 ))
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222 // cout << "Are neighbours: digit (E = " << digit1->fEnergy << ") with x = " << digit1->fX << " and z = " << digit1->fZ <<
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223 // " is neighbour with digit (E = " << digit2->fEnergy << ") with x = " << digit2->fX << " and z = " << digit2->fZ << endl;
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225 if(TMath::Abs(digit1->fTime - digit2->fTime ) < fEmcTimeGate)
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233 // cout << "Not neighbours: digit (E = " << digit1->fEnergy << ") with x = " << digit1->fX << " and z = " << digit1->fZ <<
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234 // " is not neighbour with digit (E = " << digit2->fEnergy << ") with x = " << digit2->fX << " and z = " << digit2->fZ << endl;
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242 Int_t AliHLTCaloClusterizer::CheckArray()
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244 if(fArraySize == fNRecPoints)
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247 AliHLTCaloRecPointDataStruct **tmp = new AliHLTCaloRecPointDataStruct*[fArraySize];
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248 memcpy(tmp, fRecPointArray, fArraySize/2 * sizeof(AliHLTCaloRecPointDataStruct*));
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249 delete fRecPointArray;
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250 fRecPointArray = tmp;
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255 Int_t AliHLTCaloClusterizer::CheckBuffer()
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257 // See header file for class documentation
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258 if((fAvailableSize - fUsedSize) < sizeof(AliHLTCaloRecPointDataStruct))
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260 Int_t recPointOffset = reinterpret_cast<UChar_t*>(fRecPointDataPtr) - reinterpret_cast<UChar_t*>(fFirstRecPointPtr);
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261 fAvailableSize *= 2;
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262 UChar_t *tmp = new UChar_t[fAvailableSize];
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263 memcpy(tmp, fRecPointDataPtr, fAvailableSize/2);
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264 for(Int_t n = 0; n < fNRecPoints; n++)
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266 fRecPointArray[n] = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(reinterpret_cast<UChar_t*>(fRecPointArray[n]) - reinterpret_cast<UChar_t*>(fFirstRecPointPtr) + reinterpret_cast<UChar_t*>(tmp));
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268 delete fRecPointDataPtr;
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269 fFirstRecPointPtr = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(tmp);
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270 fRecPointDataPtr = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(tmp + recPointOffset);
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276 Int_t AliHLTCaloClusterizer::CheckDigits(AliHLTCaloRecPointDataStruct** recArray, AliHLTCaloDigitDataStruct** digitArray, Int_t nRP)
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278 AliHLTCaloRecPointDataStruct **recpoints = recArray;
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279 AliHLTCaloDigitDataStruct **digits = digitArray;
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280 Int_t nRecPoints = nRP;
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284 recpoints = fRecPointArray;
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286 if(digitArray == 0)
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288 digits = fDigitsPointerArray;
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292 nRecPoints = fNRecPoints;
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294 for(Int_t i = 0; i < nRecPoints; i++)
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297 AliHLTCaloRecPointDataStruct *recPoint = recpoints[i];
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299 //AliHLTCaloRecPointDataStruct *recPoint = fRecPointArray[0];
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300 Int_t multiplicity = recPoint->fMultiplicity;
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301 Int_t *digitIndexPtr = &(recPoint->fDigits);
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302 for(Int_t j = 0; j < multiplicity; j++)
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304 //AliHLTCaloRecPointDataStruct *recPoint = fRecPointArray[j];
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305 // AliHLTCaloDigitDataStruct *digit = digits[*digitIndexPtr];
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307 //recPoint = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(digitIndexPtr);
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314 Int_t AliHLTCaloClusterizer::CheckDigits(AliHLTCaloRecPointDataStruct** recArray, AliHLTCaloDigitDataStruct* digitArray, Int_t nRP)
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316 AliHLTCaloRecPointDataStruct **recpoints = recArray;
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317 AliHLTCaloDigitDataStruct *digits = digitArray;
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318 Int_t nRecPoints = nRP;
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322 recpoints = fRecPointArray;
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326 nRecPoints = fNRecPoints;
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328 for(Int_t i = 0; i < nRecPoints; i++)
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331 AliHLTCaloRecPointDataStruct *recPoint = recpoints[i];
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333 //AliHLTCaloRecPointDataStruct *recPoint = fRecPointArray[0];
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334 Int_t multiplicity = recPoint->fMultiplicity;
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335 Int_t *digitIndexPtr = &(recPoint->fDigits);
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336 for(Int_t j = 0; j < multiplicity; j++)
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338 //AliHLTCaloRecPointDataStruct *recPoint = fRecPointArray[j];
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339 AliHLTCaloDigitDataStruct digit = digits[*digitIndexPtr];
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341 //recPoint = reinterpret_cast<AliHLTCaloRecPointDataStruct*>(digitIndexPtr);
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