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mmeineke | 
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#ifndef _ABSTRACT_CLASSES_H_ | 
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#define _ABSTRACT_CLASSES_H_ | 
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#include "Atom.hpp" | 
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#ifdef IS_MPI | 
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#include "mpi.h" | 
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#endif | 
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class Constraint{ | 
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public:  | 
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  Constraint(){} | 
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  ~Constraint(){} | 
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  int    get_a()             {return a;} | 
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  void   set_a(int index)    {a = index;} | 
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  int    get_b()             {return b;} | 
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  void   set_b(int index)    {b = index;} | 
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  double get_dsqr()          {return dsqr;} | 
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  void   set_dsqr(double ds) {dsqr = ds;} | 
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private: | 
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  int a; /* index of constrained atom a */ | 
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  int b; /* index of constrained atom b */ | 
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  double dsqr; /* the square of the constraint distance */ | 
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}; | 
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class SRI{ | 
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public: | 
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  SRI(){ c_potential_E = 0.0; } | 
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  virtual ~SRI() {} | 
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  virtual void calc_forces() = 0; | 
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  double get_potential(){ return c_potential_E; } | 
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  virtual int is_constrained() = 0; | 
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  virtual Constraint *get_constraint() = 0; | 
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  virtual void constrain(double bond_distance) = 0; | 
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  virtual void printMe( void ) = 0; | 
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protected: | 
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  double c_potential_E; | 
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}; | 
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struct ex_pair { | 
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  int i; | 
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  int j; | 
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}; | 
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class Integrator{ | 
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public: | 
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  Integrator(){} | 
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  virtual ~Integrator(){} | 
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  virtual void integrate( void ) = 0; | 
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}; | 
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#endif |