Facet.cpp

/*

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 */

#include <set>
#define _BACKWARD_BACKWARD_WARNING_H 1 //Cut out the vtk deprecated warning
#include <vtkIdTypeArray.h>
#include <vtkTriangle.h>
#include <vtkPolygon.h>
#include "Exception.hpp"

#include "Facet.hpp"

template<unsigned DIM>
Facet<DIM>::Facet(std::vector<boost::shared_ptr<Polygon<DIM> > > polygons) :
        mPolygons(polygons),
        mVertices(),
        mVerticesUpToDate(false),
        mData(),
        mLabel(),
        mReferenceLength(BaseUnits::Instance()->GetReferenceLengthScale())
{

}

template<unsigned DIM>
Facet<DIM>::Facet(boost::shared_ptr<Polygon<DIM> > pPolygon) :
        mPolygons(),
        mVertices(),
        mVerticesUpToDate(false),
        mData(),
        mLabel(),
        mReferenceLength(BaseUnits::Instance()->GetReferenceLengthScale())
{
    mPolygons.push_back(pPolygon);
}

template<unsigned DIM>
boost::shared_ptr<Facet<DIM> > Facet<DIM>::Create(std::vector<boost::shared_ptr<Polygon<DIM> > > polygons)
{
    MAKE_PTR_ARGS(Facet<DIM>, pSelf, (polygons));
    return pSelf;
}

template<unsigned DIM>
boost::shared_ptr<Facet<DIM> > Facet<DIM>::Create(boost::shared_ptr<Polygon<DIM> > pPolygon)
{
    MAKE_PTR_ARGS(Facet<DIM>, pSelf, (pPolygon));
    return pSelf;
}

template<unsigned DIM>
Facet<DIM>::~Facet()
{
}

template<unsigned DIM>
void Facet<DIM>::AddPolygons(std::vector<boost::shared_ptr<Polygon<DIM> > > polygons)
{
    mPolygons.insert(mPolygons.end(), polygons.begin(), polygons.end());
    mVerticesUpToDate = false;
}

template<unsigned DIM>
void Facet<DIM>::AddPolygon(boost::shared_ptr<Polygon<DIM> > pPolygon)
{
    mPolygons.push_back(pPolygon);
    mVerticesUpToDate = false;
}

template<unsigned DIM>
bool Facet<DIM>::ContainsPoint(const DimensionalChastePoint<DIM>& location)
{
    bool contains_point = false;
    for (unsigned idx = 0; idx < mPolygons.size(); idx++)
    {
        if (mPolygons[idx]->ContainsPoint(location))
        {
            contains_point = true;
            break;
        }
    }
    return contains_point;
}

template<unsigned DIM>
std::vector<units::quantity<unit::length> > Facet<DIM>::GetBoundingBox()
{
    std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > vertices = GetVertices();
    c_vector<double, 6> box;

    for (unsigned idx = 0; idx < vertices.size(); idx++)
    {
        c_vector<double, DIM> vertex_location = vertices[idx]->GetLocation(mReferenceLength);
        for (unsigned jdx = 0; jdx < DIM; jdx++)
        {
            if (idx == 0)
            {
                box[2 * jdx] = vertex_location[jdx];
                box[2 * jdx + 1] = vertex_location[jdx];
            }
            else
            {
                if (vertex_location[jdx] < box[2 * jdx])
                {
                    box[2 * jdx] = vertex_location[jdx];
                }
                if (vertex_location[jdx] > box[2 * jdx + 1])
                {
                    box[2 * jdx + 1] = vertex_location[jdx];
                }
            }
        }
    }

    std::vector<units::quantity<unit::length> > box_vector(6);
    for(unsigned idx=0; idx<6; idx++)
    {
        box_vector[idx] = box[idx] * mReferenceLength;
    }

    return box_vector;
}

template<unsigned DIM>
DimensionalChastePoint<DIM> Facet<DIM>::GetCentroid()
{
    double centroid[3];
    std::pair<vtkSmartPointer<vtkPoints>, vtkSmartPointer<vtkIdTypeArray> > vertex_data = GetVtkVertices();
    vtkPolygon::ComputeCentroid(vertex_data.second, vertex_data.first, centroid);
    c_vector<double, DIM> return_centroid;
    for (unsigned idx = 0; idx < DIM; idx++)
    {
        return_centroid[idx] = centroid[idx];
    }
    if(DIM==3)
    {
        return DimensionalChastePoint<DIM>(return_centroid, mReferenceLength);
    }
    else
    {
        return DimensionalChastePoint<DIM>(return_centroid[0], return_centroid[1], 0.0, mReferenceLength);
    }
}

template<unsigned DIM>
std::string Facet<DIM>::GetLabel()
{
    return mLabel;
}

template<unsigned DIM>
units::quantity<unit::length> Facet<DIM>::GetDistance(const DimensionalChastePoint<DIM>& location)
{
    double location_array[3];
    for(unsigned idx=0; idx<DIM;idx++)
    {
        location_array[idx] = location.GetLocation(mReferenceLength)[idx];
    }
    if(DIM==2)
    {
        location_array[2] = 0.0;
    }

    vtkSmartPointer<vtkPlane> p_plane = GetPlane();
    double distance = p_plane->DistanceToPlane(&location_array[0]);
    return distance*mReferenceLength;
}

template<unsigned DIM>
c_vector<double, DIM> Facet<DIM>::GetNormal()
{
    std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > vertices = GetVertices();
    if (vertices.size() < 3)
    {
        EXCEPTION("At least 3 vertices are required to generate a normal.");
    }

    std::pair<vtkSmartPointer<vtkPoints>, vtkSmartPointer<vtkIdTypeArray> > vertex_data = GetVtkVertices();
    double loc1[3];
    double loc2[3];
    double loc3[3];
    vertex_data.first->GetPoint(0, loc1);
    vertex_data.first->GetPoint(1, loc2);
    vertex_data.first->GetPoint(2, loc3);
    c_vector<double, 3> normal;
    vtkTriangle::ComputeNormal(loc1, loc2, loc3, &normal[0]);
    if(DIM==3)
    {
        return normal;
    }
    else
    {
        c_vector<double, 2> normal_2d;
        normal_2d[0] = normal[0];
        normal_2d[1] = normal[1];
        return normal_2d;
    }
}

template<unsigned DIM>
vtkSmartPointer<vtkPlane> Facet<DIM>::GetPlane()
{
    vtkSmartPointer<vtkPlane> p_plane = vtkSmartPointer<vtkPlane>::New();
    c_vector<double, DIM> centroid = GetCentroid().GetLocation(mReferenceLength);
    c_vector<double, DIM> normal = GetNormal();
    if(DIM==3)
    {
        p_plane->SetOrigin(centroid[0], centroid[1], centroid[2]);
        p_plane->SetNormal(normal[0], normal[1], normal[2]);
    }
    else
    {
        p_plane->SetOrigin(centroid[0], centroid[1], 0.0);
        p_plane->SetNormal(normal[0], normal[1], 0.0);
    }
    return p_plane;
}

template<unsigned DIM>
std::vector<boost::shared_ptr<Polygon<DIM> > > Facet<DIM>::GetPolygons()
{
    return mPolygons;
}

template<unsigned DIM>
std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > Facet<DIM>::GetVertices()
{
    if (!mVerticesUpToDate)
    {
        UpdateVertices();
    }
    return mVertices;
}

template<unsigned DIM>
std::pair<vtkSmartPointer<vtkPoints>, vtkSmartPointer<vtkIdTypeArray> > Facet<DIM>::GetVtkVertices()
{
    vtkSmartPointer<vtkIdTypeArray> p_vertexIds = vtkSmartPointer<vtkIdTypeArray>::New();
    vtkSmartPointer<vtkPoints> p_vertices = vtkSmartPointer<vtkPoints>::New();
    std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > vertices = GetVertices();

    p_vertices->SetNumberOfPoints(vertices.size());
    for (vtkIdType idx = 0; idx < vtkIdType(vertices.size()); idx++)
    {
        c_vector<double, DIM> vertex_location = vertices[idx]->GetLocation(mReferenceLength);
        if(DIM==3)
        {
            p_vertices->SetPoint(idx, vertex_location[0], vertex_location[1], vertex_location[2]);
        }
        else
        {
            p_vertices->SetPoint(idx, vertex_location[0], vertex_location[1], 0.0);
        }
        p_vertexIds->InsertNextValue(idx);
    }
    return std::pair<vtkSmartPointer<vtkPoints>, vtkSmartPointer<vtkIdTypeArray> >(p_vertices, p_vertexIds);
}

template<unsigned DIM>
void Facet<DIM>::RotateAboutAxis(c_vector<double, 3> axis, double angle)
{
    std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > vertices = GetVertices();
    for(unsigned idx=0; idx<vertices.size(); idx++)
    {
        vertices[idx]->RotateAboutAxis(axis, angle);
    }
}

template<unsigned DIM>
void Facet<DIM>::SetLabel(const std::string& label)
{
    mLabel= label;
}

template<unsigned DIM>
void Facet<DIM>::Translate(DimensionalChastePoint<DIM> translationVector)
{
    std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > vertices = GetVertices();
    for(unsigned idx=0; idx<vertices.size(); idx++)
    {
        vertices[idx]->Translate(translationVector);
    }
}

template<unsigned DIM>
void Facet<DIM>::UpdateVertices()
{
    std::set<boost::shared_ptr<DimensionalChastePoint<DIM> > > unique_vertices;
    for (unsigned idx = 0; idx < mPolygons.size(); idx++)
    {
        std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > > polygon_vertices = mPolygons[idx]->GetVertices();
        std::copy(polygon_vertices.begin(), polygon_vertices.end(),
                  std::inserter(unique_vertices, unique_vertices.end()));
    }
    mVertices = std::vector<boost::shared_ptr<DimensionalChastePoint<DIM> > >();
    mVertices.insert(mVertices.end(), unique_vertices.begin(), unique_vertices.end());

    for (unsigned idx = 0; idx < mVertices.size(); idx++)
    {
        mVertices[idx]->SetIndex(idx);
    }
    mVerticesUpToDate = true;
}

// Explicit instantiation
template class Facet<2>;
template class Facet<3>;