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/////////////////////////////////////////////////////////////
// //
// Copyright (c) 2003-2014 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 __ROTELASTICINTERACTION_H
#define __ROTELASTICINTERACTION_H
#include "Model/RotPairInteraction.h"
#include "Model/RotParticle.h"
#include "Model/IGParam.h"
/*!
\brief Interaction group parameters for CRotElasticInteractionGroups
*/
class CRotElasticIGP : public AIGParam
{
protected:
public:
CRotElasticIGP();
CRotElasticIGP(const std::string &name, double kr, bool scaling);
double m_kr;
bool m_scaling;
virtual void packInto(CVarMPIBuffer*) const;
void setNormalSpringConst(double k){m_kr=k;};
double getNormalSpringConst() const{return m_kr;};
virtual std::string getTypeString() const {return "RotElastic";}
friend ostream& operator<<(ostream&,const CRotElasticIGP&);
};
CRotElasticIGP* extractRotElasticIGP(AMPIBuffer*);
CRotElasticIGP* extractRotElasticIGP_p(AMPIBuffer*);
/*!
\class CRotElasticInteraction
\brief Elastic Interaction between free rotational particles
*/
class CRotElasticInteraction : public ARotPairInteraction
{
public:
typedef double (CRotElasticInteraction::* ScalarFieldFunction)() const;
typedef pair<bool,double> (CRotElasticInteraction::* CheckedScalarFieldFunction)() const;
typedef Vec3 (CRotElasticInteraction::* VectorFieldFunction)() const;
static ScalarFieldFunction getScalarFieldFunction(const string&);
static CheckedScalarFieldFunction getCheckedScalarFieldFunction(const string&);
static VectorFieldFunction getVectorFieldFunction(const string&);
private:
double m_kr; //!< spring constant
Vec3 m_force; //!< caching force for E_pot
double m_nForce; //!< normal force, always >= 0
Vec3 m_cpos; //!< current position
Vec3 m_D; //!< initial positions of the particles
bool m_scaling; //!< scaling of normal stiffness with particle size
public:
typedef CRotElasticIGP ParameterType;
CRotElasticInteraction();
CRotElasticInteraction(CRotParticle*,CRotParticle*,const CRotElasticIGP&);
virtual ~CRotElasticInteraction(){};
virtual Vec3 getPos() const {return m_cpos;}
static string getType(){return "RotElastic";}
virtual void calcForces();
Vec3 getForce() const;
double getPotentialEnergy() const;
friend ostream& operator<<(ostream&,const CRotElasticInteraction&);
// save/load of restart parameters
virtual void saveRestartData(std::ostream &oStream);
virtual void loadRestartData(std::istream &iStream);
};
#endif //__ELASTICINTERACTION_H
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