AxisymmetricIntersectionOfWalls.cc

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
//For the list of developers, see <http://www.MercuryDPM.org/Team>.
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//    derived from this software without specific prior written permission.
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#include "AxisymmetricIntersectionOfWalls.h"
#include "Particles/BaseParticle.h"

AxisymmetricIntersectionOfWalls::AxisymmetricIntersectionOfWalls()
{
    logger(DEBUG, "AxisymmetricIntersectionOfWalls() finished");
}

AxisymmetricIntersectionOfWalls::AxisymmetricIntersectionOfWalls(const AxisymmetricIntersectionOfWalls &other)
        : IntersectionOfWalls(other)
{
    logger(DEBUG, "AxisymmetricIntersectionOfWalls(const AxisymmetricIntersectionOfWalls &p) finished");
}

AxisymmetricIntersectionOfWalls::~AxisymmetricIntersectionOfWalls()
{
    logger(DEBUG, "~AxisymmetricIntersectionOfWalls() finished.");
}

AxisymmetricIntersectionOfWalls& AxisymmetricIntersectionOfWalls::operator=(const AxisymmetricIntersectionOfWalls& other)
{
    if (this == &other)
    {
        return *this;
    }
    else
    {
        return *(other.copy());
    }
}

AxisymmetricIntersectionOfWalls* AxisymmetricIntersectionOfWalls::copy() const
{
    return new AxisymmetricIntersectionOfWalls(*this);
}

bool AxisymmetricIntersectionOfWalls::getDistanceAndNormal(const BaseParticle& p, Mdouble& distance, Vec3D& normalReturn) const
{
    //transform to axisymmetric coordinates
    //move the coordinate system to the axis origin, so pOrigin=(xhat,yhat,zhat)
    Vec3D pOrigin = p.getPosition() -getPosition(); 
    Mdouble normal = Vec3D::dot(pOrigin, getOrientation());
    //tangential is the projection into the (xhat,yhat) plane
    Vec3D tangentialUnitVector = pOrigin - normal * getOrientation();
    Mdouble tangential = tangentialUnitVector.getLength();
    if (tangential!=0.0)
        tangentialUnitVector /= tangential;
    else //in this case the tangential vector is irrelevant
        logger(WARN, "Warning: Particle % is exactly on the symmetry axis of wall %", p.getIndex(), getIndex());
    Vec3D transformedPosition = Vec3D(tangential, 0.0, normal); //now P=(r,phi,zhat) is cylindrical
    Vec3D transformedNormal;
    //determine wall distance, normal and contact in axissymmetric coordinates
    //and transform from axisymmetric coordinates
    if (!IntersectionOfWalls::getDistanceAndNormal(transformedPosition, p.getWallInteractionRadius(), distance, transformedNormal))
    {
        //if not in contact
        return false;
    }
    else
    {
        //if in contact
        normalReturn = transformedNormal.Z * getOrientation() + transformedNormal.X * tangentialUnitVector;
        return true;
    }
}

void AxisymmetricIntersectionOfWalls::read(std::istream& is)
{
    IntersectionOfWalls::read(is);
}

void AxisymmetricIntersectionOfWalls::write(std::ostream& os) const
{
    IntersectionOfWalls::write(os);
}

std::string AxisymmetricIntersectionOfWalls::getName() const
{
    return "AxisymmetricIntersectionOfWalls";
}


BaseInteraction* AxisymmetricIntersectionOfWalls::getInteractionWith(BaseParticle* p, Mdouble timeStamp, InteractionHandler* interactionHandler)
{
    Mdouble distance;
    Vec3D normal;

    if (getDistanceAndNormal(*p,distance,normal))
    {
        BaseInteraction* c = interactionHandler->getInteraction(p, this, timeStamp);
        c->setNormal(-normal);
        c->setDistance(distance);
        c->setOverlap(p->getRadius() - distance);
        c->setContactPoint(p->getPosition()-(p->getRadius()- 0.5 * c->getOverlap())*c->getNormal());
        return c;
    }
    else
    {
        return 0;
    }
}