GaussianStateConversions Namespace Reference

Functions
MultiGaussianState< 5 >	multiGaussianStateFromTSOS (const TrajectoryStateOnSurface &tsos)
MultiGaussianState< 3 >	multiGaussianStateFromVertex (const VertexState aState)
TrajectoryStateOnSurface	tsosFromMultiGaussianState (const MultiGaussianState< 5 > &multiState, const TrajectoryStateOnSurface &refTsos)
VertexState	vertexFromMultiGaussianState (const MultiGaussianState< 3 > &multiState)

Function Documentation

MultiGaussianState< 5 > GaussianStateConversions::multiGaussianStateFromTSOS

(

const TrajectoryStateOnSurface &

tsos

)

Definition at line 10 of file TsosGaussianStateConversions.cc.

References makeMuonMisalignmentScenario::components, TrajectoryStateOnSurface::components(), and TrajectoryStateOnSurface::isValid().

Referenced by MultiTrajectoryStateMerger::merge().

  {
    if ( !tsos.isValid() )  return MultiGaussianState<5>();

    using SingleStatePtr = std::shared_ptr<SingleGaussianState<5>>;
    auto const & components = tsos.components();
    MultiGaussianState<5>::SingleStateContainer singleStates;
    singleStates.reserve(components.size());
    for (auto const & ic : components) {
      if ( ic.isValid() ) {
    auto sgs = std::make_shared<SingleGaussianState<5>>(ic.localParameters().vector(),
                                  ic.localError().matrix(),
                                  ic.weight());
    singleStates.push_back(sgs);
      }
    }
    return MultiGaussianState<5>(singleStates);
  }

MultiGaussianState< 3 > GaussianStateConversions::multiGaussianStateFromVertex

(

const VertexState

aState

)

Definition at line 9 of file VertexGaussianStateConversions.cc.

References makeMuonMisalignmentScenario::components, VertexState::components(), and HLT_FULL_cff::parameters.

Referenced by GsfVertexMerger::merge().

  {
    typedef std::shared_ptr< SingleGaussianState<3> > SingleStatePtr;
    const std::vector<VertexState> components = aState.components();
    MultiGaussianState<3>::SingleStateContainer singleStates;
    singleStates.reserve(components.size());
    for ( std::vector<VertexState>::const_iterator ic=components.begin();
      ic!=components.end(); ic ++ ) {
      if ( ic->isValid() ) {
    GlobalPoint pos(ic->position());
    AlgebraicVector3 parameters;
    parameters(0) = pos.x(); parameters(1) = pos.y(); parameters(2) = pos.z();
    SingleStatePtr sgs(new SingleGaussianState<3>(parameters,
                             ic->error().matrix(),
                             ic->weightInMixture()));
    singleStates.push_back(sgs);
      }
    }
    return MultiGaussianState<3>(singleStates);
  }

TrajectoryStateOnSurface GaussianStateConversions::tsosFromMultiGaussianState	(	const MultiGaussianState< 5 > &	multiState,
		const TrajectoryStateOnSurface &	refTsos
	)

Definition at line 29 of file TsosGaussianStateConversions.cc.

References makeMuonMisalignmentScenario::components, MultiGaussianState< N >::components(), TrajectoryStateOnSurface::components(), TrajectoryStateOnSurface::magneticField(), TrajectoryStateOnSurface::surface(), and TrajectoryStateOnSurface::surfaceSide().

Referenced by MultiTrajectoryStateMerger::merge().

  {
    if ( multiState.components().empty() )  return TrajectoryStateOnSurface();
    const Surface & surface = refTsos.surface();
    SurfaceSide side = refTsos.surfaceSide();
    const MagneticField* field = refTsos.magneticField();
    auto const & refTsos1 = refTsos.components().front();
    auto pzSign = refTsos1.localParameters().pzSign();
    bool charged = refTsos1.charge()!=0;

    auto const & singleStates = multiState.components();
    std::vector<TrajectoryStateOnSurface> components;
    components.reserve(singleStates.size());
    for ( auto const & ic : singleStates ) {
      components.emplace_back((*ic).weight(), 
                              LocalTrajectoryParameters((*ic).mean(), pzSign,charged),
                            LocalTrajectoryError((*ic).covariance()),
                          surface,field,side);
    }
    return TrajectoryStateOnSurface((BasicTrajectoryState*)new BasicMultiTrajectoryState(components));
  }

VertexState GaussianStateConversions::vertexFromMultiGaussianState

(

const MultiGaussianState< 3 > &

multiState

)

Definition at line 30 of file VertexGaussianStateConversions.cc.

References makeMuonMisalignmentScenario::components, MultiGaussianState< N >::components(), relativeConstraints::error, and position.

Referenced by GsfVertexMerger::merge().

  {
    if ( multiState.components().empty() )  return VertexState();

    const MultiGaussianState<3>::SingleStateContainer& singleStates = 
      multiState.components();
    std::vector<VertexState> components;
    components.reserve(singleStates.size());
    for ( MultiGaussianState<3>::SingleStateContainer::const_iterator ic=singleStates.begin();
      ic!=singleStates.end(); ic++ ) {
      const AlgebraicVector3& par = (**ic).mean();
      GlobalPoint position(par(0),par(1),par(2));
      const AlgebraicSymMatrix33& cov = (**ic).covariance();
      GlobalError error(cov(0,0),cov(1,0),cov(2,0),cov(1,1),cov(2,1),cov(2,2));
      components.push_back(VertexState(position,error,(**ic).weight()));
    }
    return VertexState(new BasicMultiVertexState(components));
  }