InfiniteWall.h

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

class InfiniteWall : public BaseWall
{
    public:
    InfiniteWall() : BaseWall()
    {
        #ifdef CONSTUCTOR_OUTPUT
            std::cout<<"InfiniteWall () finished"<<std::endl;
        #endif
    }
    
    InfiniteWall (const InfiniteWall &p) : BaseWall(p)
    {
        normal=p.normal;
        position=p.position;
        factor=p.factor;
        #ifdef CONSTUCTOR_OUTPUT
        std::cout<<"InfiniteWall (const InfiniteWall &p) finished"<<std::endl;
        #endif
    }   

    InfiniteWall* copy() const
    {
        return new InfiniteWall(*this);
    } 

    void clear()
    {
        indSpecies = 0;
        velocity.set_zero();
    }     

    void set(Vec3D normal_, Mdouble position_) 
    {
        //factor is used to set n to unit length 
        factor = 1. / sqrt(Dot(normal_, normal_));
        normal = normal_ * factor;
        position = position_ * factor;      
    }

    void move(Mdouble position_) {
        position=position_*factor;
    }

    void move(Vec3D velocity_, Mdouble dt) {
        velocity=velocity_;
        position+=Dot(velocity,normal)*dt;
    }
    
    void move_time(Mdouble dt) {
        position+=Dot(velocity,normal)*dt;
    }
        

    Mdouble get_distance(const Vec3D &Position) {return position - Dot(Position, normal);}

    bool get_distance_and_normal(BaseParticle &P, Mdouble &distance, Vec3D &normal_return)
    {
        distance = get_distance(P.get_Position());
        if (distance>=P.get_WallInteractionRadius())
            return false;
        normal_return = normal;
        return true;
    }

    void read(std::istream& is)  { 
        std::string dummy;
        is >> dummy >> normal >> dummy >> position >> dummy >> velocity;
    }

    void print(std::ostream& os) const { 
        os << "InfiniteWall normal " << normal << " position " << position;
        //\todo{species should be written}
        //optional output
        if (velocity.GetLength2()) os << " velocity " << velocity;
    }

    Vec3D get_Normal() const {return normal;}
    Mdouble get_Position() const  {return position;}

    Vec3D get_Velocity() const  {return velocity;}
    
private:
    Vec3D normal;     //<outward unit normal vector
    Mdouble position;  //<position n*x=p
    Mdouble factor;    //<This is the normal to rescale to unit vectoers.
};

#endif