/data/refman/pasoursint/CMSSW_5_3_3/src/TrackingTools/GsfTracking/src/GsfPropagatorWithMaterial.cc

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#include "TrackingTools/GsfTracking/interface/GsfPropagatorWithMaterial.h"

#include "TrackingTools/GsfTools/interface/MultiTrajectoryStateAssembler.h"
#include "TrackingTools/GeomPropagators/interface/AnalyticalPropagator.h"
#include "TrackingTools/GeomPropagators/interface/PropagationDirectionFromPath.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/Exception.h"

GsfPropagatorWithMaterial::GsfPropagatorWithMaterial (const Propagator& aPropagator,
                                                      const GsfMaterialEffectsUpdator& aMEUpdator) :
  Propagator(aPropagator.propagationDirection()),
  theGeometricalPropagator(new GsfPropagatorAdapter(aPropagator)),
  theConvolutor(new FullConvolutionWithMaterial(aMEUpdator)),
  theMaterialLocation(atDestination)
{  
  //   if ( propWithPathTimer1==0 )  defineTimer();
}

GsfPropagatorWithMaterial::GsfPropagatorWithMaterial (const GsfPropagatorAdapter& aGsfPropagator,
                                                      const FullConvolutionWithMaterial& aConvolutor) :
  Propagator(aGsfPropagator.propagationDirection()),
  theGeometricalPropagator(aGsfPropagator.clone()),
  theConvolutor(aConvolutor.clone()),
  theMaterialLocation(atDestination) 
{  
  //   if ( propWithPathTimer1==0 )  defineTimer();
}

// void
// GsfPropagatorWithMaterial::defineTimer()
// {
//   if ( propWithPathTimer1==0 ) {
//     propWithPathTimer1 = 
//       &(*TimingReport::current())[string("GsfPropagatorWithMaterial:toPlane")];
//     propWithPathTimer2 = 
//       &(*TimingReport::current())[string("GsfPropagatorWithMaterial:toCylinder")];
//     static SimpleConfigurable<bool> timeConf(false,"GsfPropagatorWithMaterial:activateTiming");
//     if ( timeConf.value() ) {
//       propWithPathTimer1->switchCPU(false);
//       propWithPathTimer2->switchCPU(false);
//     }
//     else {
//       propWithPathTimer1->switchOn(false);
//       propWithPathTimer2->switchOn(false);
//     }
//   }
// }

std::pair<TrajectoryStateOnSurface,double> 
GsfPropagatorWithMaterial::propagateWithPath (const TrajectoryStateOnSurface& tsos, 
                                              const Plane& plane) const {
  //   TimeMe t1(*propWithPathTimer1,false);
  //
  // add material before propagation?
  //
  TrajectoryStateOnSurface stateAtSource;
  if ( materialAtSource() )
    stateAtSource = convoluteStateWithMaterial(tsos,propagationDirection());
  else
    stateAtSource = tsos;
  if ( !stateAtSource.isValid() )  return TsosWP(stateAtSource,0.);
  //
  // geometrical propagation
  //
  TsosWP propStateWP(theGeometricalPropagator->propagateWithPath(stateAtSource,plane));
  if ( !(propStateWP.first).isValid() )  return propStateWP;
  //
  // return convoluted state
  //
  return convoluteWithMaterial(propStateWP);
}

std::pair<TrajectoryStateOnSurface,double> 
GsfPropagatorWithMaterial::propagateWithPath (const TrajectoryStateOnSurface& tsos, 
                                              const Cylinder& cylinder) const {
  //   TimeMe t2(*propWithPathTimer2,false);
  //
  // add material before propagation?
  //
  TrajectoryStateOnSurface stateAtSource;
  if ( materialAtSource() )
    stateAtSource = convoluteStateWithMaterial(tsos,propagationDirection());
  else
    stateAtSource = tsos;
  if ( !stateAtSource.isValid() )  return TsosWP(stateAtSource,0.);
  //
  // geometrical propagation
  //
  TsosWP propStateWP(theGeometricalPropagator->propagateWithPath(stateAtSource,cylinder));
  if ( !(propStateWP.first).isValid() )  return propStateWP;
  //
  // return convoluted state
  //
  return convoluteWithMaterial(propStateWP);
}

std::pair<TrajectoryStateOnSurface,double> 
GsfPropagatorWithMaterial::propagateWithPath (const FreeTrajectoryState& fts, 
                                              const Plane& plane) const {
  static int nWarn(0);
  if ( nWarn++<5 )
    edm::LogInfo("GsfPropagatorWithMaterial") 
      << "GsfPropagatorWithMaterial used from FTS: input state might have been collapsed!";
  TsosWP propStateWP = theGeometricalPropagator->propagateWithPath(fts,plane);
  if ( !(propStateWP.first).isValid() || materialAtSource() )  return propStateWP;
  //
  // return convoluted state
  //
  return convoluteWithMaterial(propStateWP);
}

std::pair<TrajectoryStateOnSurface,double> 
GsfPropagatorWithMaterial::propagateWithPath (const FreeTrajectoryState& fts, 
                                              const Cylinder& cylinder) const {
  static int nWarn(0);
  if ( nWarn++<5 )
    edm::LogInfo("GsfPropagatorWithMaterial") 
      << "GsfPropagatorWithMaterial used from FTS: input state might have been collapsed!";
  TsosWP propStateWP = theGeometricalPropagator->propagateWithPath(fts,cylinder);
  if ( !(propStateWP.first).isValid() || materialAtSource() )  return propStateWP;
  //
  // return convoluted state
  //
  return convoluteWithMaterial(propStateWP);
}


void GsfPropagatorWithMaterial::setPropagationDirection (PropagationDirection dir) const {
  theGeometricalPropagator->setPropagationDirection(dir);
  Propagator::setPropagationDirection(dir);
}

std::pair<TrajectoryStateOnSurface,double>
GsfPropagatorWithMaterial::convoluteWithMaterial (const TsosWP& aStateWithPath) const
{
  //
  // convolute with material
  //
  PropagationDirection propDir = PropagationDirectionFromPath()(aStateWithPath.second,
                                                                propagationDirection());
  return TsosWP((*theConvolutor)(aStateWithPath.first,propDir),
                aStateWithPath.second);
}

TrajectoryStateOnSurface
GsfPropagatorWithMaterial::convoluteStateWithMaterial (const TrajectoryStateOnSurface tsos,
                                                       const PropagationDirection propDir) const
{
  //
  // convolute with material
  //
  return (*theConvolutor)(tsos,propDir);
}

bool
GsfPropagatorWithMaterial::materialAtSource() const {
  if ( propagationDirection()==anyDirection ) {
    if ( theMaterialLocation!=atDestination ) { 
      throw cms::Exception("LogicError")
        << "PropagatorWithMaterial: propagation direction = anyDirection is "
        << "incompatible with adding of material at source";
    }
  }
  return theMaterialLocation==atSource || (theMaterialLocation==fromDirection&&
                                           propagationDirection()==alongMomentum);
}

// TimingReport::Item* GsfPropagatorWithMaterial::propWithPathTimer1(0);
// TimingReport::Item* GsfPropagatorWithMaterial::propWithPathTimer2(0);