+//______________________________________________________________________________
+Bool_t AliMUONTrackHitPattern::FindMatchingPads(const AliMUONTrackParam* trackParam,
+ TArrayI& matchedDetElemId, TObjArray& pads,
+ const AliMUONVDigitStore& digitStore,
+ Bool_t isTriggerTrack) const
+{
+ //
+ /// Search for matching digits in trigger chamber
+ //
+ enum {kBending, kNonBending};
+
+ Double_t minMatchDist[2];
+ Int_t padsInCheckArea[2];
+
+ AliMUONTrackParam trackParamAtPadZ(*trackParam);
+
+ Int_t inputDetElemId = matchedDetElemId[0];
+
+ for(Int_t cath=0; cath<2; cath++){
+ minMatchDist[cath] = 99999.;
+ padsInCheckArea[cath] = 0;
+ }
+
+ Int_t iChamber = AliMpDEManager::GetChamberId(inputDetElemId);
+ Int_t iSlat = inputDetElemId%100;
+
+ TIter next(digitStore.CreateTriggerIterator());
+ AliMUONVDigit* mDigit;
+
+ Double_t xPad = 0., yPad = 0., zPad = 0.;
+ Double_t sigmaX = 0., sigmaY = 0.;
+
+ Double_t nSigmas = ( isTriggerTrack ) ? GetRecoParam()->GetStripCutForTrigger() : GetRecoParam()->GetSigmaCutForTrigger();
+ Bool_t goodForEff = kTRUE;
+
+ while ( ( mDigit = static_cast<AliMUONVDigit*>(next()) ) )
+ {
+ Int_t currDetElemId = mDigit->DetElemId();
+ Int_t currCh = AliMpDEManager::GetChamberId(currDetElemId);
+ if ( currCh != iChamber ) continue;
+ Int_t currSlat = currDetElemId%100;
+ Int_t slatDiff = TMath::Abs(currSlat-iSlat);
+ if ( slatDiff>1 && slatDiff<17 ) continue; // Check neighbour slats
+
+ Int_t cathode = mDigit->Cathode();
+ Int_t ix = mDigit->PadX();
+ Int_t iy = mDigit->PadY();
+ const AliMpVSegmentation* seg = AliMpSegmentation::Instance()
+ ->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(cathode));
+ AliMpPad pad = seg->PadByIndices(ix,iy,kTRUE);
+
+ // Get local pad coordinates
+ Double_t xPadLocal = pad.GetPositionX();
+ Double_t yPadLocal = pad.GetPositionY();
+ Double_t dpx = pad.GetDimensionX();
+ Double_t dpy = pad.GetDimensionY();
+ Double_t xWidth = 2. * dpx;
+ Double_t yWidth = 2. * dpy;
+
+ // Get global pad coordinates
+ fkTransformer.Local2Global(currDetElemId, xPadLocal, yPadLocal, 0., xPad, yPad, zPad);
+
+ // Get track parameters at pad z
+ if ( trackParamAtPadZ.CovariancesExist() ) AliMUONTrackExtrap::LinearExtrapToZCov(&trackParamAtPadZ, zPad);
+ else AliMUONTrackExtrap::LinearExtrapToZ(&trackParamAtPadZ, zPad);
+
+ Double_t deltaX = TMath::Abs(xPad-trackParamAtPadZ.GetNonBendingCoor()) - dpx;
+ Double_t deltaY = TMath::Abs(yPad-trackParamAtPadZ.GetBendingCoor()) - dpy;
+
+
+ // Get sigmas
+ if ( isTriggerTrack ) {
+ Double_t checkWidth = TMath::Min(xWidth, yWidth);
+ Double_t maxCheckArea = GetRecoParam()->GetMaxStripAreaForTrigger() * checkWidth;
+ Double_t sigma = TMath::Max(checkWidth, 2.);
+ sigmaX = sigma; // in cm
+ sigmaY = sigma; // in cm
+ if ( deltaX <= maxCheckArea && deltaY <= maxCheckArea ) {
+ padsInCheckArea[cathode]++;
+ if ( padsInCheckArea[cathode] > 2 ) {
+ goodForEff = kFALSE;
+ AliDebug(2, Form("padsInCheckArea[%i] = %i\n",cathode,padsInCheckArea[cathode]));
+ }
+ }
+ }
+ else {
+ const TMatrixD& kCovParam = trackParamAtPadZ.GetCovariances();
+ sigmaX = TMath::Sqrt(kCovParam(0,0)); // in cm
+ sigmaY = TMath::Sqrt(kCovParam(2,2)); // in cm
+ }
+
+ AliDebug(2, Form("\nDetElemId %i Cath %i Dim = (%.2f,%.2f) Pad (%i,%i) = (%.2f,%.2f) Track = (%.2f,%.2f) Delta (%.2f,%.2f) Sigma (%.2f,%.2f) p %g\n",
+ currDetElemId,cathode,dpx,dpy,ix,iy,xPad,yPad,trackParamAtPadZ.GetNonBendingCoor(),trackParamAtPadZ.GetBendingCoor(),deltaX,deltaY,sigmaX,sigmaY,trackParamAtPadZ.P()));
+ //if ( deltaX <= maxCheckArea && deltaY <= maxCheckArea ) padsInCheckArea[cathode]++;
+ if ( deltaX > nSigmas * sigmaX || deltaY > nSigmas * sigmaY ) continue;
+ Double_t matchDist = TMath::Max(deltaX, deltaY);
+ if ( matchDist > minMatchDist[cathode] ) continue;
+ if ( pads.At(cathode) ) delete pads.RemoveAt(cathode);
+ pads.AddAt((AliMpPad*)pad.Clone(),cathode);
+ minMatchDist[cathode] = matchDist;
+ matchedDetElemId[cathode] = currDetElemId; // Set the input detection element id to the matched one
+ } // loop on digits
+
+// // If track matches many pads, it is not good for effciency determination.
+// // However we still want to calculate the hit pattern.
+// for ( Int_t cath=0; cath<2; cath++ ){
+// if ( padsInCheckArea[cath] > 2 ) {
+// AliDebug(2, Form("padsInCheckArea[%i] = %i\n",cath,padsInCheckArea[cath]));
+// return kFALSE;
+// }
+// }
+
+ return goodForEff;
+}
+
+
+//_____________________________________________________________________________
+UInt_t AliMUONTrackHitPattern::GetHitPattern(const AliMUONTrackParam& trackParam, Bool_t isTriggerTrack) const
+{
+ //
+ /// Searches for matching digits around the track.
+ //
+
+ AliCodeTimerAuto("",0);
+
+ TArrayI digitPerTrack(2);
+ digitPerTrack.Reset();
+
+ UInt_t pattern = 0;
+
+ TObjArray trackParamList, matchedPads(2), maskedPads(2), padsFromPos(4), validPads(2);
+ trackParamList.SetOwner(); matchedPads.SetOwner(); maskedPads.SetOwner(); padsFromPos.SetOwner();
+
+ Int_t firstSlat = -1, firstBoard = -1;
+ AliESDMuonTrack::EAliTriggerChPatternFlag goodForEff = AliESDMuonTrack::kBoardEff;
+ TArrayI matchedDetElemId(2), maskedDetElemId(2), detElemIdFromTrack(2), validDetElemId(2);
+
+ for(Int_t ich=0; ich<AliMUONConstants::NTriggerCh(); ich++) { // chamber loop
+
+ trackParamList.Delete(); matchedPads.Delete(); maskedPads.Delete(); padsFromPos.Delete(); validPads.Clear();
+
+ Int_t nFound = GetTrackParamAtChamber(trackParam, 11+ich, trackParamList, detElemIdFromTrack, padsFromPos);
+ if ( nFound == 0 ) {
+ // track is rejected since the extrapolated track
+ // does not match a slat (border effects)
+ AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackOutsideGeometry);
+ goodForEff = AliESDMuonTrack::kNoEff;
+ AliDebug(2, "Warning: trigger track outside trigger chamber\n");
+ continue;
+ }
+
+ // Search for masked pads
+ maskedDetElemId.Reset(detElemIdFromTrack[0]);
+ FindMatchingPads((AliMUONTrackParam*)trackParamList.At(0), maskedDetElemId, maskedPads, *(fkTriggerUtilities->GetMaskedDigits()), isTriggerTrack);
+ if ( maskedPads.GetEntries() > 0 ) {
+ AliESDMuonTrack::AddEffInfo(pattern,AliESDMuonTrack::kTrackMatchesMasks); // pad is masked
+ goodForEff = AliESDMuonTrack::kNoEff;
+ for ( Int_t icath=0; icath<2; icath++ ) {
+ AliMpPad* currPad = (AliMpPad*)maskedPads.UncheckedAt(icath);
+ if ( ! currPad ) continue;
+ AliDebug(2,Form("DetElemId %i cath %i board %i strip %i is masked: effFlag 0", matchedDetElemId[icath], icath, currPad->GetLocalBoardId(0), currPad->GetLocalBoardChannel(0)));
+ }
+ // continue;
+ // We want to calculate the hit pattern in any case, so we do not "continue"
+ // However we set the flag in such a way not to use the track for efficiency calculations
+ }
+
+ // If no masked pads matched, search for active pads
+ matchedDetElemId.Reset(detElemIdFromTrack[0]);
+ if ( ! FindMatchingPads((AliMUONTrackParam*)trackParamList.At(0), matchedDetElemId, matchedPads, fkDigitStore, isTriggerTrack) ) {
+ // if ! FindPadMatchingTrig => too many digits matching pad =>
+ // => Event not clear => Do not use for efficiency calculation
+ AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesManyPads);
+ goodForEff = AliESDMuonTrack::kNoEff;
+ AliDebug(2, Form("Warning: track in %i matches many pads. Rejected!\n", matchedDetElemId[0]));
+ }
+
+ Int_t nMatched = 0;
+
+ Int_t mostProbDEmatched = detElemIdFromTrack[0];
+ for ( Int_t icath=0; icath<2; icath++ ) {
+ if ( matchedPads.UncheckedAt(icath) ) {
+ nMatched++;
+ // Fill pattern anyway
+ AliESDMuonTrack::SetFiredChamber(pattern, icath, ich);
+ digitPerTrack[icath]++;
+ mostProbDEmatched = matchedDetElemId[icath];
+ }
+ }
+ Int_t mostProbDEindex = 0;
+ for ( Int_t ifound=0; ifound<nFound; ifound++ ) {
+ if ( detElemIdFromTrack[ifound] == mostProbDEmatched ) {
+ mostProbDEindex = ifound;
+ break;
+ }
+ }
+
+ if ( goodForEff == AliESDMuonTrack::kNoEff ) continue;
+
+ for ( Int_t icath=0; icath<2; icath++ ) {
+ if ( matchedPads.UncheckedAt(icath) ) {
+ validPads.AddAt(matchedPads.UncheckedAt(icath),icath);
+ validDetElemId[icath] = matchedDetElemId[icath];
+ }
+ else {
+ validPads.AddAt(padsFromPos.UncheckedAt(2*mostProbDEindex + icath),icath);
+ validDetElemId[icath] = detElemIdFromTrack[mostProbDEindex];
+ }
+ }
+
+ Int_t currSlat = mostProbDEmatched%100;
+ if ( firstSlat < 0 ) firstSlat = currSlat;
+
+ if ( currSlat != firstSlat || validDetElemId[0] != validDetElemId[1] ) {
+ goodForEff = AliESDMuonTrack::kChEff;
+ firstSlat = AliESDMuonTrack::kCrossDifferentSlats;
+ }
+
+ if ( firstBoard < 0 ) firstBoard = ((AliMpPad*)validPads.UncheckedAt(0))->GetLocalBoardId(0);
+
+ for ( Int_t icath=0; icath<2; icath++ ){
+
+ if ( goodForEff == AliESDMuonTrack::kBoardEff) {
+ Bool_t atLeastOneLoc = kFALSE;
+ AliMpPad* currPad = (AliMpPad*)validPads.UncheckedAt(icath);
+ for ( Int_t iloc=0; iloc<currPad->GetNofLocations(); iloc++) {
+ if ( currPad->GetLocalBoardId(iloc) == firstBoard ) {
+ atLeastOneLoc = kTRUE;
+ break;
+ }
+ } // loop on locations
+ if ( ! atLeastOneLoc ) goodForEff = AliESDMuonTrack::kSlatEff;
+ }
+ } // loop on cathodes
+ // } // if track good for efficiency
+ } // end chamber loop
+
+ if ( goodForEff == AliESDMuonTrack::kNoEff ) return pattern;
+
+ for(Int_t cath=0; cath<2; cath++){
+ if(digitPerTrack[cath]<3) {
+ // track is rejected since the number of associated
+ // digits found is less than 3.
+ AliESDMuonTrack::AddEffInfo(pattern, AliESDMuonTrack::kTrackMatchesFewPads);
+ goodForEff = AliESDMuonTrack::kNoEff;
+ AliDebug(2, Form("Warning: found %i digits for trigger track cathode %i.\nRejecting event\n", digitPerTrack[cath],cath));
+ }
+ } // loop on cathodes
+
+ if ( goodForEff == AliESDMuonTrack::kNoEff ) return pattern;
+
+ AliESDMuonTrack::AddEffInfo(pattern, firstSlat, firstBoard, goodForEff);
+ return pattern;
+}
+
+
+
+//_____________________________________________________________________________
+Int_t AliMUONTrackHitPattern::GetTrackParamAtChamber(const AliMUONTrackParam& inputTrackParam, Int_t chamber,
+ TObjArray& trackParamList, TArrayI& foundDetElemId,
+ TObjArray& padsFromPos) const
+{
+ //
+ /// Return the extrapolated the track parameter at the given chamber
+ /// and returns the matching DetElemId
+ /// CAVEAT: at the border the result is not univoque
+ //
+
+ Int_t nFound = 0;
+ foundDetElemId[0] = foundDetElemId[1] = 0;
+ AliMUONTrackParam trackParamCopy(inputTrackParam);
+ TVector3 globalPoint1(trackParamCopy.GetNonBendingCoor(), trackParamCopy.GetBendingCoor(), trackParamCopy.GetZ());
+ AliMUONTrackExtrap::LinearExtrapToZ(&trackParamCopy, trackParamCopy.GetZ() + 20.);
+ TVector3 globalPoint2(trackParamCopy.GetNonBendingCoor(), trackParamCopy.GetBendingCoor(), trackParamCopy.GetZ());
+ TVector3 localCoor;
+
+ // AliMpArea pointArea(x, y, 2.*AliMpConstants::LengthTolerance(), 2.*AliMpConstants::LengthTolerance());
+ AliMpDEIterator it;
+ Double_t xGlobal, yGlobal, zGlobal;
+ for ( it.First(chamber-1); ! it.IsDone(); it.Next() ){
+ Int_t detElemId = it.CurrentDEId();
+ PosInDetElemIdLocal(localCoor, globalPoint1, globalPoint2, detElemId);
+ fkTransformer.Local2Global(detElemId, localCoor.X(), localCoor.Y(), localCoor.Z(), xGlobal, yGlobal, zGlobal);
+ AliMpArea pointArea(xGlobal, yGlobal, 2.*AliMpConstants::LengthTolerance(), 2.*AliMpConstants::LengthTolerance());
+ AliMpArea* deArea = fkTransformer.GetDEArea(detElemId);
+ if ( deArea->Contains(pointArea) ) {
+ // Check if track matches valid pads
+ // (this is not trivial for cut RPC)
+ Int_t validPads = 0;
+ for ( Int_t icath=0; icath<2; icath++ ) {
+ const AliMpVSegmentation* seg =
+ AliMpSegmentation::Instance()
+ ->GetMpSegmentation(detElemId,AliMp::GetCathodType(icath));
+ AliMpPad pad = seg->PadByPosition(localCoor.X(),localCoor.Y(),kFALSE);
+ if ( pad.IsValid() ) {
+ padsFromPos.AddAt(pad.Clone(), 2*nFound + icath);
+ validPads++;
+ }
+ }
+ if ( validPads < 2 ) continue;
+ AliMUONTrackParam* extrapTrackParam = new AliMUONTrackParam(inputTrackParam);
+ if ( extrapTrackParam->CovariancesExist() ) AliMUONTrackExtrap::LinearExtrapToZCov(extrapTrackParam, zGlobal);
+ else AliMUONTrackExtrap::LinearExtrapToZ(extrapTrackParam, zGlobal);
+ trackParamList.AddAt(extrapTrackParam,nFound);
+ foundDetElemId[nFound] = detElemId;
+ nFound++;
+ if ( nFound == 2 ) break;
+ }
+ else if ( nFound > 0 ) break;
+ } // loop on detElemId
+
+ return nFound;
+}
+
+