// 
// Copyright 2006 by Johannes Hofmann
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//

#ifndef PROJECTION_H
#define PROJECTION_H

#include "Hill.H"
#include "ViewParams.H"

class Projection {
 protected:
  double pi_d;

 public:
  typedef enum {
    TANGENTIAL = 0,
    SPHAERIC   = 1
  } Projection_t;

  Projection();

  virtual void get_coordinates(double a_view, double a_nick,
	const ViewParams *parms, double *x, double *y);
  
  virtual int comp_params(const Hill *m1, const Hill *m2, ViewParams *parms);
};
#endif