GyotoMinkowski.h

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/*
    Copyright 2014 Thibaut Paumard
 
    This file is part of Gyoto.
 
    Gyoto is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    Gyoto 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 General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with Gyoto.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
#ifndef __GyotoMinkowski_H_
#define __GyotoMinkowski_H_
 
#include <GyotoMetric.h>
 
namespace Gyoto {
  namespace Metric { class Minkowski; }
}
 
class Gyoto::Metric::Minkowski
: public Gyoto::Metric::Generic
{
  friend class Gyoto::SmartPointer<Gyoto::Metric::Minkowski>;
 
 private:
  
 public:
  // Those are mere wrappers arround Generic::coordKind(), useful for
  // declaring a boolen property using the macro GYOTO_PROPERTY_BOOL:
  void spherical(bool);
  bool spherical() const;
  // This is the bare minimum of what a Metric class must implement:
  GYOTO_OBJECT;
  Minkowski();
  virtual Minkowski* clone() const ;
 
  void gmunu(double g[4][4], const double x[4]) const ;
  int christoffel(double dst[4][4][4], const double x[4]) const ;
 
  // Those two are implemented as examples.
  double gmunu(const double x[4], int mu, int nu) const ;
  double christoffel(const double coord[4],
                     const int alpha, const int mu, const int nu) const ;
  void observerTetrad(obskind_t obskind,
                      double const pos[4], double fourvel[4],
                      double screen1[4], double screen2[4], 
                      double screen3[4]) const;
};
 
#endif