RestrictedWall.cc

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#include <limits>

#include "RestrictedWall.h"
#include "Particles/BaseParticle.h"
#include "InteractionHandler.h"
#include "WallHandler.h"
#include "DPMBase.h"

RestrictedWall::RestrictedWall()
{
    wall_ = nullptr;
    restriction_ = nullptr;
    logger(DEBUG, "RestrictedWall::RestrictedWall ) finished");
}

RestrictedWall::RestrictedWall(const RestrictedWall& w)
        : BaseWall(w)
{
    wall_ = nullptr;
    restriction_ = nullptr;
    set(w.wall_, w.restriction_);
    logger(DEBUG, "RestrictedWall::RestrictedWall(const RestrictedWall &p) finished");
}

RestrictedWall::RestrictedWall(BaseWall* wall, InfiniteWall* restriction)
{
    wall_ = nullptr;
    restriction_ = nullptr;
    set(wall, restriction);
}

RestrictedWall::~RestrictedWall()
{
    if (wall_ != nullptr)
    {
        delete wall_;
        wall_ = nullptr;
    }
    if (restriction_ != nullptr)
    {
        delete restriction_;
        restriction_ = nullptr;
    }
    logger(DEBUG, "RestrictedWall::~RestrictedWall finished");
}

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

/*
 * \param[in] normal A Vec3D that represents the normal to the wall.
 * \param[in] point A Vec3D which is a point on the wall.
 * \details Sets the wall such that for all points x on the wall it holds that 
 * normal*x=normal*point.
 */
void RestrictedWall::set(BaseWall* wall, InfiniteWall* restriction)
{
    if (wall_ != nullptr)
    {
        delete wall_;
        wall_ = nullptr;
    }
    wall_ = wall->copy();
    setSpecies(wall_->getSpecies());
    
    if (restriction_ != nullptr)
    {
        delete restriction_;
        restriction_ = nullptr;
    }
    restriction_ = restriction->copy();
    
    // std::cout << *this << std::endl;
}

bool RestrictedWall::getDistanceAndNormal(const BaseParticle& p, Mdouble& distance, Vec3D& normal_return) const
{
    if (restriction_->getDistance(p.getPosition()) < p.getWallInteractionRadius(this))
        return wall_->getDistanceAndNormal(p, distance, normal_return);
    else
        return false;
}

void RestrictedWall::read(std::istream& is)
{
    wall_->read(is);
    restriction_->read(is);
}

void RestrictedWall::write(std::ostream& os) const
{
    //todo check
    os << getName() << ' ';
    wall_->write(os);
    os << ' ';
    restriction_->write(os);
}

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

BaseInteraction*
RestrictedWall::getInteractionWith(BaseParticle* p, unsigned timeStamp, InteractionHandler* interactionHandler)
{
    if (restriction_->getDistance(p->getPosition()) < p->getWallInteractionRadius(this))
    {
        wall_->setIndex(getIndex());
        return wall_->getInteractionWith(p, timeStamp, interactionHandler);
    }
    else
    {
        return nullptr;
    }
}

void RestrictedWall::writeVTK(VTKContainer& vtk) const
{
    const size_t size0 = vtk.triangleStrips.size();
    //write full BaseWall
    wall_->writeVTK(vtk);
    
    //copy out the new triangle strips, so we can modify them
    std::vector<std::vector<double>> myTriangleStrips;
    while (vtk.triangleStrips.size() > size0)
    {
        myTriangleStrips.push_back(vtk.triangleStrips.back());
        vtk.triangleStrips.pop_back();
    }
    
    //now remove points that are in restricted area
    for (const std::vector<double>& myTriangleStrip: myTriangleStrips)
    {
        unsigned counter = 0;
        std::vector<double> cell;
        //for each triangle
        for (const double c: myTriangleStrip)
        {
            Mdouble distance = restriction_->getDistance(vtk.points[c]);
            if (distance < 0)
            {
                //if the current point is inside the restricted volume, write it
                cell.push_back(c);
                counter = 0;
            }
            else
            {
                if (counter >= 2)
                {
                    //if the current point is not in restriction, don't write it and flush the cell into the cells array
                    if (cell.size() > 2)
                        vtk.triangleStrips.push_back(cell);
                    cell.clear();
                    counter = 0;
                }
                vtk.points[c] += distance * restriction_->getNormal();
                cell.push_back(c);
                counter++;
            }
        }
        if (cell.size() > 2)
        {
            //if the current point is not in restriction, don't write it and flush the cell into the cells array
            vtk.triangleStrips.push_back(cell);
            cell.clear();
        }
    }
}