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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 __LINEARDASHPOTINTERACTION_H
#define __LINEARDASHPOTINTERACTION_H
#include "Model/IGParam.h"
#include "Model/Interaction.h"
#include "Model/Particle.h"
/*!
\brief Interaction group parameters for Linear Dashpot interactions
*/
class CLinearDashpotIGP : public AIGParam
{
public:
double m_damp;
double m_cutoff;
CLinearDashpotIGP();
CLinearDashpotIGP(const std::string&,double,double);
virtual std::string getTypeString() const {return "LinearDashpot";}
};
/*!
\class CLinearDashpotInteraction
\brief Linear Dashpot Interaction between free or bonded particles (to be used in addition to an elastic or bonded Interaction, not exclusively)
\author Steffen Abe
$Revision: 1201 $
$Date: 2009-07-31 12:25:45 +0200 (Fri, 31 Jul 2009) $
*/
class CLinearDashpotInteraction : public APairInteraction
{
public:
typedef double (CLinearDashpotInteraction::* ScalarFieldFunction)() const;
typedef Vec3 (CLinearDashpotInteraction::* VectorFieldFunction)() const;
typedef pair<bool,double> (CLinearDashpotInteraction::* CheckedScalarFieldFunction)() const;
static ScalarFieldFunction getScalarFieldFunction(const string&);
static VectorFieldFunction getVectorFieldFunction(const string&);
static CheckedScalarFieldFunction getCheckedScalarFieldFunction(const string&);
private:
double m_damp;//!< spring constant
double m_cutoff; //!< interaction distance cutoff, relative to particle radii
double m_cross_section; //!< cross section of dashpot, calculated from particle radii
Vec3 m_force; // caching force for E_pot
Vec3 m_cpos; // center position
public:
typedef CLinearDashpotIGP ParameterType;
CLinearDashpotInteraction(CParticle*,CParticle*,const CLinearDashpotIGP&);
virtual ~CLinearDashpotInteraction(){};
virtual Vec3 getPos() const {return m_cpos;};
double getPotentialEnergy() const;
virtual void calcForces();
Vec3 getForce() const;
};
#endif //__HERTZIANELASTICINTERACTION_H
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