/data/refman/pasoursint/CMSSW_4_2_9_HLT1_bphpatch4/src/RecoVertex/GhostTrackFitter/src/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::Error	convert (const GhostTrackPrediction::Vector &pred, const CurvilinearTrajectoryError &error)
static GhostTrackPrediction::Vector	convert (const GlobalTrajectoryParameters &trajectory)

---

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::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());
}

static GhostTrackPrediction::Vector convert

(

const GlobalTrajectoryParameters &

trajectory

)

[inline, static]

Definition at line 43 of file GhostTrackPrediction.cc.

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

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