SecondaryVertex/src/TemplatedSecondaryVertex.cc

0001 #include <cmath>
0002
0003 #include <Math/Functions.h>
0004 #include <Math/SVector.h>
0005 #include <Math/SMatrix.h>
0006
0007 #include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"
0008 #include "DataFormats/GeometryVector/interface/GlobalVector.h"
0009 #include "DataFormats/VertexReco/interface/Vertex.h"
0010 #include "DataFormats/Candidate/interface/VertexCompositePtrCandidate.h"
0011
0012 #include "RecoBTag/SecondaryVertex/interface/TemplatedSecondaryVertex.h"
0013
0014 namespace reco {
0015
0016   template <>
0017   TemplatedSecondaryVertex<reco::VertexCompositePtrCandidate>::operator reco::Vertex() {
0018     CovarianceMatrix err;
0019     fillVertexCovariance(err);
0020     return reco::Vertex(Vertex::Point(vertex()), err, vertexChi2(), vertexNdof(), numberOfSourceCandidatePtrs());
0021   }
0022
0023   //it should be better without if it compiles
0024   /*template <>
0025 TemplatedSecondaryVertex<reco::Vertex>::operator reco::Vertex() {
0026 return reco::Vertex(this);
0027 }*/
0028   template <>
0029   Measurement1D TemplatedSecondaryVertex<reco::VertexCompositePtrCandidate>::computeDist1d(
0030       const Vertex &pv, const VertexCompositePtrCandidate &sv, const GlobalVector &direction, bool withPVError) {
0031     typedef ROOT::Math::SVector<double, 3> SVector1;
0032     typedef ROOT::Math::SMatrix<double, 3, 3, ROOT::Math::MatRepSym<double, 3> > SMatrixSym1;
0033     CovarianceMatrix covariance;
0034     sv.fillVertexCovariance(covariance);
0035     SMatrixSym1 cov = covariance;
0036     if (withPVError)
0037       cov += pv.covariance();
0038     SVector1 vector(0, 0, sv.vertex().Z() - pv.position().Z());
0039
0040     double dist = ROOT::Math::Mag(vector);
0041     double error = ROOT::Math::Similarity(cov, vector);
0042     if (error > 0.0 && dist > 1.0e-9)
0043       error = std::sqrt(error) / dist;
0044     else
0045       error = -1.0;
0046     if ((vector[0] * direction.x() + vector[1] * direction.y() + vector[2] * direction.z()) < 0.0)
0047       dist = -dist;
0048     return Measurement1D(dist, error);
0049   }
0050
0051   template <>
0052   Measurement1D TemplatedSecondaryVertex<reco::VertexCompositePtrCandidate>::computeDist2d(
0053       const Vertex &pv, const VertexCompositePtrCandidate &sv, const GlobalVector &direction, bool withPVError) {
0054     typedef ROOT::Math::SVector<double, 2> SVector2;
0055     typedef ROOT::Math::SMatrix<double, 2, 2, ROOT::Math::MatRepSym<double, 2> > SMatrixSym2;
0056     CovarianceMatrix covariance;
0057     sv.fillVertexCovariance(covariance);
0058
0059     SMatrixSym2 cov = covariance.Sub<SMatrixSym2>(0, 0);
0060     if (withPVError)
0061       cov += pv.covariance().Sub<SMatrixSym2>(0, 0);
0062
0063     SVector2 vector(sv.vertex().X() - pv.position().X(), sv.vertex().Y() - pv.position().Y());
0064     double dist = ROOT::Math::Mag(vector);
0065     double error = ROOT::Math::Similarity(cov, vector);
0066     if (error > 0.0 && dist > 1.0e-9)
0067       error = std::sqrt(error) / dist;
0068     else
0069       error = -1.0;
0070
0071     if ((vector[0] * direction.x() + vector[1] * direction.y()) < 0.0)
0072       dist = -dist;
0073
0074     return Measurement1D(dist, error);
0075   }
0076   template <>
0077   Measurement1D TemplatedSecondaryVertex<reco::VertexCompositePtrCandidate>::computeDist3d(
0078       const Vertex &pv, const VertexCompositePtrCandidate &sv, const GlobalVector &direction, bool withPVError) {
0079     typedef ROOT::Math::SVector<double, 3> SVector3;
0080     typedef ROOT::Math::SMatrix<double, 3, 3, ROOT::Math::MatRepSym<double, 3> > SMatrixSym3;
0081     CovarianceMatrix covariance;
0082     sv.fillVertexCovariance(covariance);
0083
0084     SMatrixSym3 cov = covariance;
0085     if (withPVError)
0086       cov += pv.covariance();
0087
0088     SVector3 vector(
0089         sv.vertex().X() - pv.position().X(), sv.vertex().Y() - pv.position().Y(), sv.vertex().Z() - pv.position().Z());
0090
0091     double dist = ROOT::Math::Mag(vector);
0092     double error = ROOT::Math::Similarity(cov, vector);
0093     if (error > 0.0 && dist > 1.0e-9)
0094       error = std::sqrt(error) / dist;
0095     else
0096       error = -1.0;
0097
0098     if ((vector[0] * direction.x() + vector[1] * direction.y() + vector[2] * direction.z()) < 0.0)
0099       dist = -dist;
0100
0101     return Measurement1D(dist, error);
0102   }
0103
0104   template <>
0105   Measurement1D TemplatedSecondaryVertex<reco::Vertex>::computeDist1d(const Vertex &pv,
0106                                                                       const Vertex &sv,
0107                                                                       const GlobalVector &direction,
0108                                                                       bool withPVError) {
0109     typedef ROOT::Math::SVector<double, 3> SVector1;
0110     typedef ROOT::Math::SMatrix<double, 3, 3, ROOT::Math::MatRepSym<double, 3> > SMatrixSym1;
0111
0112     SMatrixSym1 cov = sv.covariance();
0113     if (withPVError)
0114       cov += pv.covariance();
0115
0116     SVector1 vector(0.0, 0.0, sv.position().Z() - pv.position().Z());
0117
0118     double dist = ROOT::Math::Mag(vector);
0119     double error = ROOT::Math::Similarity(cov, vector);
0120     if (error > 0.0 && dist > 1.0e-9)
0121       error = std::sqrt(error) / dist;
0122     else
0123       error = -1.0;
0124
0125     if ((vector[0] * direction.x() + vector[1] * direction.y() + vector[2] * direction.z()) < 0.0)
0126       dist = -dist;
0127
0128     return Measurement1D(dist, error);
0129   }
0130
0131   template <>
0132   Measurement1D TemplatedSecondaryVertex<reco::Vertex>::computeDist2d(const Vertex &pv,
0133                                                                       const Vertex &sv,
0134                                                                       const GlobalVector &direction,
0135                                                                       bool withPVError) {
0136     typedef ROOT::Math::SVector<double, 2> SVector2;
0137     typedef ROOT::Math::SMatrix<double, 2, 2, ROOT::Math::MatRepSym<double, 2> > SMatrixSym2;
0138
0139     SMatrixSym2 cov = sv.covariance().Sub<SMatrixSym2>(0, 0);
0140     if (withPVError)
0141       cov += pv.covariance().Sub<SMatrixSym2>(0, 0);
0142
0143     SVector2 vector(sv.position().X() - pv.position().X(), sv.position().Y() - pv.position().Y());
0144
0145     double dist = ROOT::Math::Mag(vector);
0146     double error = ROOT::Math::Similarity(cov, vector);
0147     if (error > 0.0 && dist > 1.0e-9)
0148       error = std::sqrt(error) / dist;
0149     else
0150       error = -1.0;
0151
0152     if ((vector[0] * direction.x() + vector[1] * direction.y()) < 0.0)
0153       dist = -dist;
0154
0155     return Measurement1D(dist, error);
0156   }
0157   template <>
0158   Measurement1D TemplatedSecondaryVertex<reco::Vertex>::computeDist3d(const Vertex &pv,
0159                                                                       const Vertex &sv,
0160                                                                       const GlobalVector &direction,
0161                                                                       bool withPVError) {
0162     typedef ROOT::Math::SVector<double, 3> SVector3;
0163     typedef ROOT::Math::SMatrix<double, 3, 3, ROOT::Math::MatRepSym<double, 3> > SMatrixSym3;
0164
0165     SMatrixSym3 cov = sv.covariance();
0166     if (withPVError)
0167       cov += pv.covariance();
0168
0169     SVector3 vector(sv.position().X() - pv.position().X(),
0170                     sv.position().Y() - pv.position().Y(),
0171                     sv.position().Z() - pv.position().Z());
0172
0173     double dist = ROOT::Math::Mag(vector);
0174     double error = ROOT::Math::Similarity(cov, vector);
0175     if (error > 0.0 && dist > 1.0e-9)
0176       error = std::sqrt(error) / dist;
0177     else
0178       error = -1.0;
0179
0180     if ((vector[0] * direction.x() + vector[1] * direction.y() + vector[2] * direction.z()) < 0.0)
0181       dist = -dist;
0182
0183     return Measurement1D(dist, error);
0184   }
0185
0186 }  // namespace reco