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File indexing completed on 2021-06-12 03:09:55

0001 #include "TrackingTools/PatternTools/interface/TempTrajectory.h"
0002 #include "DataFormats/SiStripCluster/interface/SiStripClusterTools.h"
0003 #include "DataFormats/SiStripCluster/interface/SiStripCluster.h"
0004 #include "DataFormats/TrackerRecHit2D/interface/OmniClusterRef.h"
0005 #include "DataFormats/TrackerRecHit2D/interface/BaseTrackerRecHit.h"
0006 #include "DataFormats/SiPixelDetId/interface/PixelSubdetector.h"
0007 #include "Geometry/CommonDetUnit/interface/GeomDet.h"
0008 #include "FWCore/Utilities/interface/Exception.h"
0009 #include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
0010 #include "FWCore/Utilities/interface/Likely.h"
0011 
0012 namespace {
0013   template <typename DataContainer>
0014   unsigned short countTrailingValidHits(DataContainer const& meas) {
0015     unsigned short n = 0;
0016     for (auto it = meas.rbegin(); it != meas.rend(); --it) {  // it is not consistent with std...
0017       if (TempTrajectory::lost(*(*it).recHit()))
0018         break;
0019       if ((*it).recHit()->isValid())
0020         ++n;
0021     }
0022     return n;
0023   }
0024 }  // namespace
0025 
0026 TempTrajectory::TempTrajectory(Trajectory&& traj)
0027     : theChiSquared(0),
0028       theNumberOfFoundHits(0),
0029       theNumberOfFoundPixelHits(0),
0030       theNumberOfLostHits(0),
0031       theNumberOfCCCBadHits_(0),
0032       theDirection(traj.direction()),
0033       theValid(traj.isValid()),
0034       theNHseed(traj.seedNHits()),
0035       theNLoops(traj.nLoops()),
0036       theDPhiCache(traj.dPhiCacheForLoopersReconstruction()),
0037       theCCCThreshold_(traj.cccThreshold()),
0038       stopReason_(traj.stopReason()) {
0039   for (auto& it : traj.measurements()) {
0040     push(std::move(it));
0041   }
0042 }
0043 
0044 void TempTrajectory::pop() {
0045   if (!empty()) {
0046     if (theData.back().recHit()->isValid()) {
0047       theNumberOfFoundHits--;
0048       if (badForCCC(theData.back()))
0049         theNumberOfCCCBadHits_--;
0050       if (Trajectory::pixel(*(theData.back().recHit())))
0051         theNumberOfFoundPixelHits--;
0052     } else if (lost(*(theData.back().recHit()))) {
0053       theNumberOfLostHits--;
0054     }
0055     theData.pop_back();
0056     theNumberOfTrailingFoundHits = countTrailingValidHits(theData);
0057   }
0058 }
0059 
0060 void TempTrajectory::pushAux(double chi2Increment) {
0061   const TrajectoryMeasurement& tm = theData.back();
0062   if (tm.recHit()->isValid()) {
0063     theNumberOfFoundHits++;
0064     theNumberOfTrailingFoundHits++;
0065     if (badForCCC(tm))
0066       theNumberOfCCCBadHits_++;
0067     if (Trajectory::pixel(*(tm.recHit())))
0068       theNumberOfFoundPixelHits++;
0069   }
0070   //else if (lost( tm.recHit()) && !inactive(tm.recHit().det())) theNumberOfLostHits++;
0071   else if (lost(*(tm.recHit()))) {
0072     theNumberOfLostHits++;
0073     theNumberOfTrailingFoundHits = 0;
0074   }
0075 
0076   theChiSquared += chi2Increment;
0077 }
0078 
0079 void TempTrajectory::push(const TempTrajectory& segment) {
0080   assert(segment.theDirection == theDirection);
0081   assert(segment.theCCCThreshold_ == theCCCThreshold_);
0082 
0083   const int N = segment.measurements().size();
0084   TrajectoryMeasurement const* tmp[N];
0085   int i = 0;
0086   //for (DataContainer::const_iterator it = segment.measurements().rbegin(), ed = segment.measurements().rend(); it != ed; --it)
0087   for (auto const& tm : segment.measurements())
0088     tmp[i++] = &tm;
0089   while (i != 0)
0090     theData.push_back(*tmp[--i]);
0091   theNumberOfFoundHits += segment.theNumberOfFoundHits;
0092   theNumberOfFoundPixelHits += segment.theNumberOfFoundPixelHits;
0093   theNumberOfLostHits += segment.theNumberOfLostHits;
0094   theNumberOfCCCBadHits_ += segment.theNumberOfCCCBadHits_;
0095   theNumberOfTrailingFoundHits = countTrailingValidHits(theData);
0096   theChiSquared += segment.theChiSquared;
0097 }
0098 
0099 void TempTrajectory::join(TempTrajectory& segment) {
0100   assert(segment.theDirection == theDirection);
0101 
0102   if (theCCCThreshold_ != segment.theCCCThreshold_)
0103     segment.updateBadForCCC(theCCCThreshold_);
0104   if (segment.theData.shared()) {
0105     push(segment);
0106     segment.theData.clear();  // obey the contract, and increase the chances it will be not shared one day
0107   } else {
0108     theData.join(segment.theData);
0109     theNumberOfFoundHits += segment.theNumberOfFoundHits;
0110     theNumberOfFoundPixelHits += segment.theNumberOfFoundPixelHits;
0111     theNumberOfLostHits += segment.theNumberOfLostHits;
0112     theNumberOfCCCBadHits_ += segment.theNumberOfCCCBadHits_;
0113     theNumberOfTrailingFoundHits = countTrailingValidHits(theData);
0114     theChiSquared += segment.theChiSquared;
0115   }
0116 }
0117 
0118 PropagationDirection TempTrajectory::direction() const { return PropagationDirection(theDirection); }
0119 
0120 void TempTrajectory::check() const {
0121   if (theData.size() == 0)
0122     throw cms::Exception("TrackingTools/PatternTools",
0123                          "Trajectory::check() - information requested from empty Trajectory");
0124 }
0125 
0126 bool TempTrajectory::lost(const TrackingRecHit& hit) {
0127   if LIKELY (hit.isValid())
0128     return false;
0129 
0130   //     // A DetLayer is always inactive in this logic.
0131   //     // The DetLayer is the Det of an invalid RecHit only if no DetUnit
0132   //     // is compatible with the predicted state, so we don't really expect
0133   //     // a hit in this case.
0134 
0135   if (hit.geographicalId().rawId() == 0) {
0136     return false;
0137   }
0138   return hit.getType() == TrackingRecHit::missing;
0139 }
0140 
0141 bool TempTrajectory::badForCCC(const TrajectoryMeasurement& tm) {
0142   if (!trackerHitRTTI::isFromDet(*tm.recHit()))
0143     return false;
0144   auto const* thit = static_cast<const BaseTrackerRecHit*>(tm.recHit()->hit());
0145   if (!thit)
0146     return false;
0147   if (thit->isPixel() || thit->isPhase2())
0148     return false;
0149   if (!tm.updatedState().isValid())
0150     return false;
0151   return siStripClusterTools::chargePerCM(thit->rawId(),
0152                                           thit->firstClusterRef().stripCluster(),
0153                                           tm.updatedState().localParameters()) < theCCCThreshold_;
0154 }
0155 
0156 void TempTrajectory::updateBadForCCC(float ccc_threshold) {
0157   // If the supplied threshold is the same as the currently cached
0158   // one, then return the current number of bad hits for CCC,
0159   // otherwise do a new full rescan.
0160   if (ccc_threshold == theCCCThreshold_)
0161     return;
0162 
0163   theCCCThreshold_ = ccc_threshold;
0164   theNumberOfCCCBadHits_ = 0;
0165   for (auto const& h : theData) {
0166     if (badForCCC(h))
0167       theNumberOfCCCBadHits_++;
0168   }
0169 }
0170 
0171 int TempTrajectory::numberOfCCCBadHits(float ccc_threshold) {
0172   updateBadForCCC(ccc_threshold);
0173   return theNumberOfCCCBadHits_;
0174 }
0175 
0176 Trajectory TempTrajectory::toTrajectory() const {
0177   PropagationDirection p = PropagationDirection(theDirection);
0178   Trajectory traj(p);
0179   traj.setNLoops(theNLoops);
0180   traj.setStopReason(stopReason_);
0181   traj.numberOfCCCBadHits(theCCCThreshold_);
0182 
0183   traj.reserve(theData.size());
0184   const TrajectoryMeasurement* tmp[theData.size()];
0185   int i = 0;
0186   for (DataContainer::const_iterator it = theData.rbegin(), ed = theData.rend(); it != ed; --it)
0187     tmp[i++] = &(*it);
0188   while (i != 0)
0189     traj.push(*tmp[--i]);
0190   return traj;
0191 }