/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/DataFormats/PatCandidates/src/Vertexing.cc

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#include "DataFormats/PatCandidates/interface/Vertexing.h"

using pat::VertexAssociation;

void VertexAssociation::setDistances(const AlgebraicVector3 & dist, const AlgebraicSymMatrix33 &err) {
    setDz( Measurement1DFloat( std::abs(dist[2]) , std::sqrt(err(2,2)) ) );

    AlgebraicVector3 dist2D(dist[0], dist[1], 0);
    float d2 = dist2D[0]*dist2D[0] + dist2D[1]*dist2D[1];
    setDr( Measurement1DFloat( sqrt(d2), sqrt(ROOT::Math::Similarity(dist2D, err)/d2) ) );
}