MultiComponentStateCombiner.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef MultiComponentStateCombiner_H
#define MultiComponentStateCombiner_H
 
#include "TrkParameters/ComponentParameters.h"
namespace Trk {
 
namespace MultiComponentStateCombiner {
 
std::unique_ptr<Trk::TrackParameters>
combineToSingle(const MultiComponentState&,
                const bool useMode = false);
 
void
combineWithWeight(Trk::ComponentParameters& mergeTo,
                  const Trk::ComponentParameters& addThis);
 
void
combineParametersWithWeight(AmgVector(5) & firstParameters,
                            double& firstWeight,
                            const AmgVector(5) & secondParameters,
                            const double secondWeight);
 
void
combineCovWithWeight(const AmgVector(5) & firstParameters,
                     AmgSymMatrix(5) & firstMeasuredCov,
                     const double firstWeight,
                     const AmgVector(5) & secondParameters,
                     const AmgSymMatrix(5) & secondMeasuredCov,
                     const double secondWeight);
 
Trk::MultiComponentState
combineWithSmoother(const Trk::MultiComponentState& forwardsMultiState,
                    const Trk::MultiComponentState& smootherMultiState,
                    unsigned int maximumNumberOfComponents);
 
}//end of MultiComponentStateCombiner namespace
} // end Trk namespace
#endif