/*!
 * @file gravity.h
  *  Definition of ...

*/

#ifndef _GRAVITY_H
#define _GRAVITY_H

#include "field.h"

// FORWARD DEFINITION



//! A class for ...
class Gravity : public Field {

 public:
  Gravity(const TiXmlElement* root = NULL);
  virtual ~Gravity();

  void loadParams(const TiXmlElement* root);

  virtual Vector calcForce(const Vector& data) const;

 private:

};

#endif /* _GRAVITY_H */