MultiTrackPointingKinematicConstraint.h

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#ifndef MultiTrackPointingKinematicConstraint_H
#define MultiTrackPointingKinematicConstraint_H

#include "RecoVertex/KinematicFitPrimitives/interface/MultiTrackKinematicConstraint.h"
#include "RecoVertex/KinematicFitPrimitives/interface/KinematicState.h"
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"

//mother constructed from daughters. including propagation in field.

class MultiTrackPointingKinematicConstraint : public MultiTrackKinematicConstraint
{
public:
    MultiTrackPointingKinematicConstraint(GlobalPoint& ref):refPoint(ref)
    {}
    
    virtual AlgebraicVector value(const std::vector<KinematicState> states, const GlobalPoint& point) const;
    
    virtual AlgebraicMatrix parametersDerivative(const std::vector<KinematicState> states, const GlobalPoint& point) const;
    
    virtual AlgebraicMatrix positionDerivative(const std::vector<KinematicState> states, const GlobalPoint& point) const;
    
    virtual int numberOfEquations() const;
    
    virtual MultiTrackPointingKinematicConstraint * clone()const
    {
        return new MultiTrackPointingKinematicConstraint(*this);
    }
    
private:
    GlobalPoint refPoint;
    
};
#endif