EConstraint.h

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#ifndef __ECONSTRAINT_H
#define __ECONSTRAINT_H

#include "jbltools/kinfit/ParticleConstraint.h"

class ParticleFitObject;

//  Class EConstraint:

class EConstraint : public ParticleConstraint {
  public:
    EConstraint (double ecm_     
                );
                
    virtual ~EConstraint();
    
    virtual double getValue() const = 0;
    
    virtual void getDerivatives (int idim,                  
                                 double der[]               
                                ) const;
    virtual void add1stDerivativesToMatrix (int idim,       
                                            double *M       
                                           ) const;
    virtual void add2ndDerivativesToMatrix (int idim,       
                                            double *M,      
                                            double lambda   
                                            ) const;
  
    inline double getEcm() const {return ecm;};
    
  protected:
     
    double ecm;  

};

#endif // __ECONSTRAINT_H

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