GhostTrackPrediction.cc File Reference

#include <cmath>
#include <Math/SMatrix.h>
#include <Math/MatrixFunctions.h>
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/GlobalError.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "TrackingTools/TrajectoryParametrization/interface/CurvilinearTrajectoryParameters.h"
#include "TrackingTools/TrajectoryParametrization/interface/GlobalTrajectoryParameters.h"
#include "TrackingTools/TrajectoryParametrization/interface/CurvilinearTrajectoryError.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "RecoVertex/GhostTrackFitter/interface/GhostTrackPrediction.h"

Go to the source code of this file.

Functions
static GhostTrackPrediction::Vector	convert (const CurvilinearTrajectoryParameters &trajectory)
static GhostTrackPrediction::Vector	convert (const GlobalTrajectoryParameters &trajectory)
static GhostTrackPrediction::Error	convert (const GhostTrackPrediction::Vector &pred, const CurvilinearTrajectoryError &error)

Function Documentation

static GhostTrackPrediction::Vector convert ( const CurvilinearTrajectoryParameters &  trajectory )

static

Definition at line 33 of file GhostTrackPrediction.cc.

References funct::cos(), CurvilinearTrajectoryParameters::lambda(), CurvilinearTrajectoryParameters::phi(), funct::tan(), CurvilinearTrajectoryParameters::xT(), and CurvilinearTrajectoryParameters::yT().

{
    return GhostTrackPrediction::Vector(
            trajectory.yT() / std::cos(trajectory.lambda()),
            trajectory.xT(),
            std::tan(trajectory.lambda()),
            trajectory.phi());
}

static GhostTrackPrediction::Vector convert ( const GlobalTrajectoryParameters &  trajectory )

inlinestatic

Definition at line 43 of file GhostTrackPrediction.cc.

References convert(), GlobalTrajectoryParameters::momentum(), and GlobalTrajectoryParameters::position().

{
    return convert(CurvilinearTrajectoryParameters(
            trajectory.position(), trajectory.momentum(), 0));
}

static GhostTrackPrediction::Error convert ( const GhostTrackPrediction::Vector &  pred, const CurvilinearTrajectoryError &  error  )

static

Definition at line 50 of file GhostTrackPrediction.cc.

References CurvilinearTrajectoryError::matrix(), rho, and mathSSE::sqrt().

{
    using namespace ROOT::Math;

    double rho2 = pred[2] * pred[2] + 1.;
    double rho = std::sqrt(rho2);

    Matrix45 jacobian;
    jacobian(0, 1) = pred[0] * pred[2];
    jacobian(0, 4) = rho;
    jacobian(1, 3) = 1.;
    jacobian(2, 1) = rho2;
    jacobian(3, 2) = 1.;

    return Similarity(jacobian, error.matrix());
}