InfiniteWallWithHole.h

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

class InfiniteWallWithHole : public BaseWall
{
    public:
    InfiniteWallWithHole() : BaseWall()
    {
        velocity.set_zero();
        #ifdef CONSTUCTOR_OUTPUT
        std::cout<<"InfiniteWall () finished"<<std::endl;
        #endif
    }
    
    InfiniteWallWithHole(Vec3D normal, Mdouble position, Mdouble holeRadius)  : BaseWall()
    {
        this->normal=normal;
        this->position=position;
        this->holeRadius=holeRadius;
        velocity.set_zero();
        #ifdef CONSTUCTOR_OUTPUT
        std::cout<<"InfiniteWallWithHole(Vec3D normal, Mdouble position, Mdouble holeRadius) finished"<<std::endl;
        #endif
    }   
    
    InfiniteWallWithHole (const InfiniteWallWithHole &p) : BaseWall(p)
    {
        normal=p.normal;
        position=p.position;
        factor=p.factor;
        velocity=p.velocity;
        holeRadius=p.holeRadius;
        #ifdef CONSTUCTOR_OUTPUT
        std::cout<<"InfiniteWall (const InfiniteWall &p) finished"<<std::endl;
        #endif
    }   

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

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

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

    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_wallDistance(const Vec3D &Position) {return position - Dot(Position, normal);}
    
    Mdouble get_holeDistance(const Vec3D &Position) {return holeRadius-sqrt(pow(Position.X,2)+pow(Position.Y,2));}
    
    bool get_distance_and_normal(BaseParticle &P, Mdouble &distance, Vec3D &normal_return)
    {
        double wallDistance = get_wallDistance(P.get_Position());
        if (wallDistance>=P.get_Radius())
            return false;
        
        double holeDistance=get_holeDistance(P.get_Position());
        if (holeDistance>=P.get_Radius())
            return false;
        
        
        if(wallDistance>0&&holeDistance>0)
        {
            distance=sqrt(pow(wallDistance,2)+pow(holeDistance,2));
            Vec3D ContactPoint;
            double alpha=atan2(P.get_Position().Y,P.get_Position().X);
            ContactPoint.X=holeRadius*cos(alpha);
            ContactPoint.Y=holeRadius*sin(alpha);
            ContactPoint.Z=position;
            //std::cout<<"ContactPoint="<<ContactPoint<<" Particle position="<<P.get_Position()<<std::endl;
            normal_return=ContactPoint-P.get_Position();
            normal_return/=normal_return.GetLength();
            //std::cout<<"Corner collision normal="<<normal_return<<std::endl;
            return true;
        }
        else if(wallDistance>holeDistance)
        {
            distance=wallDistance;
            normal_return = normal;
            //std::cout<<"Wall collision normal="<<normal_return<<std::endl;
            return true;
        }
        else
        {
            distance=holeDistance;      
            normal_return.X=P.get_Position().X/(holeRadius-holeDistance);
            normal_return.Y=P.get_Position().Y/(holeRadius-holeDistance);;
            normal_return.Z=0;
            //std::cout<<"Hole collision normal="<<normal_return<<std::endl;
            return true;
        }       
    }

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

    void print(std::ostream& os) const{ 
        os << "InfiniteWallWithHole normal " << normal << " position " << position<< " holeRadius "<<holeRadius;
        //optional output
        if (velocity.GetLength2()) os << " velocity " << velocity;
    }

    Vec3D get_Normal() {return normal;}
    Mdouble get_Position() {return position;}
    Vec3D get_Velocity() const {return velocity;}
    void set_Velocity(Vec3D new_) {velocity = new_;}

private:
    Vec3D normal;     //<outward unit normal vector
    Mdouble position;  //<position n*x=p
    Mdouble factor;    //<This is the normal to rescale to unit vectoers.
    Vec3D velocity;        
    Mdouble holeRadius;

};

#endif