/data/git/CMSSW_5_3_11_patch5/src/RecoVertex/KinematicFit/interface/SimplePointingConstraint.h

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#ifndef SimplePointingConstraint_H
#define SimplePointingConstraint_H

#include "RecoVertex/KinematicFitPrimitives/interface/KinematicConstraint.h"


class SimplePointingConstraint : public KinematicConstraint
{
 public:
 
  SimplePointingConstraint(const GlobalPoint& ref):refPoint(ref)
  {}

 virtual std::pair<AlgebraicVector, AlgebraicVector> value(const AlgebraicVector& exPoint) const;

 virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(const AlgebraicVector& exPoint) const;

 virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(const std::vector<RefCountedKinematicParticle> par) const;

 virtual std::pair<AlgebraicVector, AlgebraicVector> value(const std::vector<RefCountedKinematicParticle> par) const;

 virtual AlgebraicVector deviations(int nStates) const;

 virtual int numberOfEquations() const;

 virtual SimplePointingConstraint * clone() const
 {return new SimplePointingConstraint(*this);}
 
 private:

 std::pair<AlgebraicVector,AlgebraicVector> makeValue(const AlgebraicVector& exPoint)const ; 
 std::pair<AlgebraicMatrix, AlgebraicVector> makeDerivative(const AlgebraicVector& exPoint) const;
 
 GlobalPoint  refPoint;

};

#endif