EmptyFrictionInteraction.h

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#ifndef EMPTYTANGENTIALINTERACTION_H
#define EMPTYTANGENTIALINTERACTION_H

#include "Interactions/BaseInteraction.h"
#include "Math/Vector.h"
class BaseParticle;
class EmptyFrictionSpecies;
class BaseInteractable;
class EmptyFrictionInteraction : public virtual BaseInteraction
{
public:
    typedef EmptyFrictionSpecies SpeciesType;
    EmptyFrictionInteraction(BaseInteractable* P, BaseInteractable* I, Mdouble timeStamp);
    EmptyFrictionInteraction(const EmptyFrictionInteraction &p);
    virtual ~EmptyFrictionInteraction();
    void computeFrictionForce();
    void read(std::istream& is);
    void write(std::ostream& os) const;
    Mdouble getElasticEnergy() const;
    const EmptyFrictionSpecies* getSpecies() const;
    std::string getBaseName() const;

// specific for tangential forces
    void integrate(Mdouble timeStep);
    Mdouble getTangentialOverlap() const;
    const Vec3D getTangentialForce() const;
};
#endif