HertzianElasticInteraction.h

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//                                                         //
// Copyright (c) 2003-2017 by The University of Queensland //
// Centre for Geoscience Computing                         //
// http://earth.uq.edu.au/centre-geoscience-computing      //
//                                                         //
// Primary Business: Brisbane, Queensland, Australia       //
// Licensed under the Open Software License version 3.0    //
// http://www.apache.org/licenses/LICENSE-2.0              //
//                                                         //
 
#ifndef __HERTZIANELASTICINTERACTION_H
#define __HERTZIANELASTICINTERACTION_H
 
#include "Model/IGParam.h"
#include "Model/Interaction.h"
#include "Model/Particle.h"
 
 
class CHertzianElasticIGP : public AIGParam
{
public:
  double m_E;
  double m_nu; // poisson ratio
 
  CHertzianElasticIGP();
  CHertzianElasticIGP(const std::string&,double,double);
  
  virtual std::string getTypeString() const {return "HertzianElastic";}
};
 
class CHertzianElasticInteraction : public APairInteraction
{
public:
 
  typedef double (CHertzianElasticInteraction::* ScalarFieldFunction)() const;
  typedef Vec3 (CHertzianElasticInteraction::* VectorFieldFunction)() const;
  typedef pair<bool,double> (CHertzianElasticInteraction::* CheckedScalarFieldFunction)() const;
 
  static ScalarFieldFunction getScalarFieldFunction(const string&);
  static VectorFieldFunction getVectorFieldFunction(const string&);
  static CheckedScalarFieldFunction getCheckedScalarFieldFunction(const string&);
 
private:
  double m_E;
  double m_nu; 
  Vec3   m_force; // caching force for E_pot
  double m_dn; // caching displacement for E_pot
  Vec3   m_cpos; // center position
 
public:
  typedef CHertzianElasticIGP ParameterType;
 
  CHertzianElasticInteraction(CParticle*,CParticle*,const CHertzianElasticIGP&);
  virtual ~CHertzianElasticInteraction(){};
 
  virtual Vec3 getPos() const {return m_cpos;};
  double getPotentialEnergy() const;
 
  virtual void calcForces();
  Vec3 getForce() const;
};
#endif //__HERTZIANELASTICINTERACTION_H