geometry/intersectspointgeometry.hh

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#ifndef DUMUX_GEOMETRY_INTERSECTS_POINT_GEOMETRY_HH
#define DUMUX_GEOMETRY_INTERSECTS_POINT_GEOMETRY_HH
 
#include <cmath>
#include <dune/common/exceptions.hh>
#include <dune/common/fvector.hh>
 
#include <dumux/geometry/intersectspointsimplex.hh>
 
namespace Dumux {
 
template <class ctype, int dimworld, class Geometry, typename std::enable_if_t<(Geometry::mydimension == 3), int> = 0>
bool intersectsPointGeometry(const Dune::FieldVector<ctype, dimworld>& point, const Geometry& g)
{
    // get the g type
    const auto type = g.type();
 
    // if it's a tetrahedron we can check directly
    if (type.isTetrahedron())
        return intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(2), g.corner(3));
 
    // split hexahedrons into five tetrahedrons
    else if (type.isHexahedron())
    {
        if (intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(3), g.corner(5))) return true;
        if (intersectsPointSimplex(point, g.corner(0), g.corner(5), g.corner(6), g.corner(4))) return true;
        if (intersectsPointSimplex(point, g.corner(5), g.corner(3), g.corner(6), g.corner(7))) return true;
        if (intersectsPointSimplex(point, g.corner(0), g.corner(3), g.corner(2), g.corner(6))) return true;
        if (intersectsPointSimplex(point, g.corner(5), g.corner(3), g.corner(0), g.corner(6))) return true;
        return false;
    }
 
    // split pyramids into two tetrahedrons
    else if (type.isPyramid())
    {
        if (intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(2), g.corner(4))) return true;
        if (intersectsPointSimplex(point, g.corner(1), g.corner(3), g.corner(2), g.corner(4))) return true;
        return false;
    }
 
    // split prisms into three tetrahedrons
    else if (type.isPrism())
    {
        if (intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(2), g.corner(4))) return true;
        if (intersectsPointSimplex(point, g.corner(3), g.corner(0), g.corner(2), g.corner(4))) return true;
        if (intersectsPointSimplex(point, g.corner(2), g.corner(5), g.corner(3), g.corner(4))) return true;
        return false;
    }
 
    else
        DUNE_THROW(Dune::NotImplemented,
                   "Intersection for point and geometry type "
                   << type << " in " << dimworld << "-dimensional world.");
}
 
template <class ctype, int dimworld, class Geometry, typename std::enable_if_t<(Geometry::mydimension == 2), int> = 0>
bool intersectsPointGeometry(const Dune::FieldVector<ctype, dimworld>& point, const Geometry& g)
{
    // get the g type
    const auto type = g.type();
 
    // if it's a triangle we can check directly
    if (type.isTriangle())
        return intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(2));
 
    // split quadrilaterals into two triangles
    else if (type.isQuadrilateral())
    {
        if (intersectsPointSimplex(point, g.corner(0), g.corner(1), g.corner(3))) return true;
        if (intersectsPointSimplex(point, g.corner(0), g.corner(3), g.corner(2))) return true;
        return false;
    }
 
    else
        DUNE_THROW(Dune::NotImplemented,
                   "Intersection for point and geometry type "
                   << type << " in " << dimworld << "-dimensional world.");
}
 
template <class ctype, int dimworld, class Geometry, typename std::enable_if_t<(Geometry::mydimension == 1), int> = 0>
bool intersectsPointGeometry(const Dune::FieldVector<ctype, dimworld>& point, const Geometry& g)
{
    return intersectsPointSimplex(point, g.corner(0), g.corner(1));
}
 
} // end namespace Dumux
 
#endif