Directional.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2005 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
// psrchive/Util/genutil/Directional.h
 
#ifndef __Directional_H
#define __Directional_H
 
#include "Mount.h"
 
class Directional : public Mount
{  
public:
  
  Directional ();
 
 
  virtual double get_vertical () const;
 
  double get_parallactic_angle () const;
 
protected:
 
  virtual Matrix<3,3,double>
  get_basis (const Vector<3,double>& from_source) const = 0;
 
  void build () const;
 
  mutable double vertical;
};
 
#endif