text: /*! \file vertex_motion.hpp
    \brief Arbitrary motion of the vertices
    \author Almog Yalinewich
   */
  
  #ifndef VERTEX_MOTION_HPP
  #define VERTEX_MOTION_HPP 1
  
  #include <vector>
  #include "../common/hydrodynamic_variables.hpp"
  
  using std::vector;
  
  //! \brief Base class for vertex motion
  class VertexMotion
  {
  public:
    
    /*! \brief Calculates the velocity of a vertex
      \param i Vertex index
      \param vp Pointer to vertices position container
      \param hv Pointer to hydrodynamics variables container
      \return Velocity of the vertex
    */
    virtual double CalcVelocity(int i, vector<double> const& vp,
  			      vector<Primitive> const& hv) const = 0;
  
    virtual ~VertexMotion(void);
  };
  
  #endif
  