- bugfix: calculate the number of hits in a tracklet also

  in case no digits manager is available (only no label)

diff --git a/TRD/AliTRDmcmSim.cxx b/TRD/AliTRDmcmSim.cxx
index f44d6a8e8805c6db9455b3db5b639929997675c5..27b52c6b81240e3b64c4963e15d383becb4ea07f 100644 (file)
--- a/TRD/AliTRDmcmSim.cxx
+++ b/TRD/AliTRDmcmSim.cxx
@@ -1691,28 +1691,31 @@ void AliTRDmcmSim::FitTracklet()
         // assemble and store the tracklet word
         fMCMT[cpu] = (pid << 24) | (padrow << 20) | (slope << 13) | offset;
 
-        // calculate MC label
+        // calculate number of hits and MC label
         Int_t mcLabel[] = { -1, -1, -1};
        Int_t nHits0 = 0;
        Int_t nHits1 = 0;
-        if (fDigitsManager) {
-         const Int_t maxLabels = 30;
-          Int_t label[maxLabels] = {0}; // up to 30 different labels possible
-          Int_t count[maxLabels] = {0};
-          Int_t nLabels = 0;
-          for (Int_t iHit = 0; iHit < fNHits; iHit++) {
-            if ((fHits[iHit].fChannel - fFitPtr[cpu] < 0) ||
-                (fHits[iHit].fChannel - fFitPtr[cpu] > 1))
-              continue;
-
-           // counting contributing hits
-           if (fHits[iHit].fTimebin >= fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQS0, fDetector, fRobPos, fMcmPos) &&
-               fHits[iHit].fTimebin <  fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQE0, fDetector, fRobPos, fMcmPos))
-             nHits0++;
-           if (fHits[iHit].fTimebin >= fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQS1, fDetector, fRobPos, fMcmPos) &&
-               fHits[iHit].fTimebin <  fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQE1, fDetector, fRobPos, fMcmPos))
-             nHits1++;
 
+       const Int_t maxLabels = 30;
+       Int_t label[maxLabels] = {0}; // up to 30 different labels possible
+       Int_t count[maxLabels] = {0};
+       Int_t nLabels = 0;
+
+       for (Int_t iHit = 0; iHit < fNHits; iHit++) {
+         if ((fHits[iHit].fChannel - fFitPtr[cpu] < 0) ||
+             (fHits[iHit].fChannel - fFitPtr[cpu] > 1))
+           continue;
+
+         // counting contributing hits
+         if (fHits[iHit].fTimebin >= fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQS0, fDetector, fRobPos, fMcmPos) &&
+             fHits[iHit].fTimebin <  fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQE0, fDetector, fRobPos, fMcmPos))
+           nHits0++;
+         if (fHits[iHit].fTimebin >= fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQS1, fDetector, fRobPos, fMcmPos) &&
+             fHits[iHit].fTimebin <  fTrapConfig->GetTrapReg(AliTRDtrapConfig::kTPQE1, fDetector, fRobPos, fMcmPos))
+           nHits1++;
+
+         // label calculation only if there is a digitsmanager to get the labels from
+         if (fDigitsManager) {
            for (Int_t i = 0; i < 3; i++) {
              Int_t currLabel = fHits[iHit].fLabel[i];
              for (Int_t iLabel = 0; iLabel < nLabels; iLabel++) {
@@ -1729,12 +1732,15 @@ void AliTRDmcmSim::FitTracklet()
              }
            }
          }
-         Int_t index[2*maxLabels];
-         TMath::Sort(maxLabels, count, index);
-         for (Int_t i = 0; i < 3; i++) {
-           if (count[index[i]] <= 0)
-             break;
-           mcLabel[i] = label[index[i]];
+
+         if (fDigitsManager) {
+           Int_t index[2*maxLabels];
+           TMath::Sort(maxLabels, count, index);
+           for (Int_t i = 0; i < 3; i++) {
+             if (count[index[i]] <= 0)
+               break;
+             mcLabel[i] = label[index[i]];
+           }
          }
         }
         new ((*fTrackletArray)[fTrackletArray->GetEntriesFast()]) AliTRDtrackletMCM((UInt_t) fMCMT[cpu], fDetector*2 + fRobPos%2, fRobPos, fMcmPos);