PXDInterceptor.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#include <tracking/dataobjects/RecoTrack.h>
#include <framework/logging/Logger.h>
#include <framework/datastore/StoreArray.h>
#include <tracking/pxdDataReductionClasses/PXDInterceptor.h>
#include <vxd/geometry/GeoCache.h>
#include <vxd/geometry/SensorInfoBase.h>
 
using namespace Belle2;
 
PXDInterceptor::PXDInterceptor(const ROIinfo* theROIinfo, double toleranceZ, double tolerancePhi):
  m_theROIinfo(*theROIinfo)
{
  m_theROIGeometry.fillPlaneList(toleranceZ, tolerancePhi);
}
 
PXDInterceptor::~PXDInterceptor()
{
}
 
void
PXDInterceptor::fillInterceptList(StoreArray<PXDIntercept>* interceptList, const StoreArray<RecoTrack>& trackList,
                                  RelationArray* recoTrackToPXDIntercepts)
{
 
  VXD::GeoCache& vxdGeometry = VXD::GeoCache::getInstance();
  std::set<Belle2::VxdID> pxdLayers = vxdGeometry.getLayers(VXD::SensorInfoBase::PXD);
 
  for (int i = 0; i < trackList.getEntries(); ++i) { //loop over all tracks
 
    B2DEBUG(20, " %%%%%  track candidate Nr. : " << i + 1);
 
    if (! trackList[i] ->wasFitSuccessful()) {
      B2DEBUG(20, "%%%%% Fit not successful! discard this RecoTrack");
      continue;
    }
 
    // extrapolate track to cylinders (PXD layers 1 and 2)
    for (unsigned int pxdLayer = 0; pxdLayer < pxdLayers.size(); pxdLayer++) {
 
      B2DEBUG(20, " fill intercept List, Layer: " << pxdLayer);
      // get current state of track
      genfit::MeasuredStateOnPlane gfTrackState = trackList[i]->getMeasuredStateOnPlaneFromFirstHit();
 
      try {
        gfTrackState.extrapolateToCylinder(m_pxdLayerRadius[pxdLayer]);
      }  catch (...) {
        B2DEBUG(20, "extrapolation to cylinder failed");
        continue;
      }
 
      std::list<ROIDetPlane> selectedPlanes;
      B2DEBUG(20, "    append selected planes, position " << gfTrackState.getPos().X() << ", " << gfTrackState.getPos().Y() << ", " <<
              gfTrackState.getPos().Z());
      m_theROIGeometry.appendSelectedPlanes(&selectedPlanes, ROOT::Math::XYZVector(gfTrackState.getPos()), pxdLayer + 1);
 
      B2DEBUG(20, "    append intercepts for track " << i);
      appendIntercepts(interceptList, selectedPlanes, trackList[i], i, recoTrackToPXDIntercepts);
    } //loop on layers
  } //loop on the track list
 
} //fillInterceptList
 
void
PXDInterceptor::appendIntercepts(StoreArray<PXDIntercept>* interceptList, std::list<ROIDetPlane> planeList, RecoTrack* recoTrack,
                                 int recoTrackIndex, RelationArray* recoTrackToPXDIntercepts)
{
 
 
  PXDIntercept tmpPXDIntercept;
 
  const genfit::Track& gfTrack = RecoTrackGenfitAccess::getGenfitTrack(*recoTrack);
 
  std::list<ROIDetPlane>::iterator itPlanes = planeList.begin();
 
  B2DEBUG(20, "appendIntercepts, checking " << planeList.size() << " planes");
 
  double lambda = 0;
 
 
  while (itPlanes != planeList.end()) {
 
    genfit::MeasuredStateOnPlane state;
 
    try {
      state = gfTrack.getFittedState();
      lambda = state.extrapolateToPlane(itPlanes->getSharedPlanePtr());
    }  catch (...) {
      B2DEBUG(20, "extrapolation to plane failed");
      ++itPlanes;
      continue;
    }
 
    const TVectorD& predictedIntersect = state.getState();
    const TMatrixDSym& covMatrix = state.getCov();
 
    tmpPXDIntercept.setCoorU(predictedIntersect[3]);
    tmpPXDIntercept.setCoorV(predictedIntersect[4]);
    tmpPXDIntercept.setSigmaU(sqrt(covMatrix(3, 3)));
    tmpPXDIntercept.setSigmaV(sqrt(covMatrix(4, 4)));
    tmpPXDIntercept.setSigmaUprime(sqrt(covMatrix(1, 1)));
    tmpPXDIntercept.setSigmaVprime(sqrt(covMatrix(2, 2)));
    tmpPXDIntercept.setLambda(lambda);
    tmpPXDIntercept.setVxdID(itPlanes->getVxdID());
 
    interceptList->appendNew(tmpPXDIntercept);
 
    recoTrackToPXDIntercepts->add(recoTrackIndex, interceptList->getEntries() - 1);
 
    ++itPlanes;
 
  }
 
}