UnitTangent.h

//-*-C++-*-
 
/***************************************************************************
 *
 *   Copyright (C) 2011 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
// psrchive/More/MEAL/MEAL/UnitTangent.h
 
#ifndef __MEAL_UnitTangent_H
#define __MEAL_UnitTangent_H
 
#include "MEAL/Evaluable.h"
#include "Vector.h"
 
namespace MEAL {
 
 
  class UnitTangent : public Evaluable< Vector<3,double> >
  {
 
  public:
 
    UnitTangent ();
 
    std::string get_name () const;
 
    void set_vector (Vector<3,double> direction);
 
    void set_vector (const Vector<3,Estimate<double> >& direction);
 
    Vector<3,double> get_basis (unsigned i) { return basis[i]; }
 
  protected:
 
    void calculate (Vector<3,double>& result, std::vector<Vector<3,double> >*);
 
    Vector<3,double> basis [3];
 
  };
 
}
 
#endif