discretization/pq1bubble/fvelementgeometry.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_DISCRETIZATION_PQ1BUBBLE_FV_ELEMENT_GEOMETRY_HH
#define DUMUX_DISCRETIZATION_PQ1BUBBLE_FV_ELEMENT_GEOMETRY_HH
 
#include <optional>
#include <utility>
 
#include <dune/common/exceptions.hh>
#include <dune/geometry/type.hh>
#include <dune/localfunctions/lagrange/pqkfactory.hh>
 
#include <dumux/common/indextraits.hh>
#include <dumux/discretization/scvandscvfiterators.hh>
 
#include <dumux/discretization/pq1bubble/geometryhelper.hh>
 
namespace Dumux {
 
template<class GG, bool enableGridGeometryCache>
class PQ1BubbleFVElementGeometry;
 
template<class GG>
class PQ1BubbleFVElementGeometry<GG, true>
{
    using GridView = typename GG::GridView;
    static constexpr int dim = GridView::dimension;
    static constexpr int dimWorld = GridView::dimensionworld;
    using GridIndexType = typename IndexTraits<GridView>::GridIndex;
    using LocalIndexType = typename IndexTraits<GridView>::LocalIndex;
    using CoordScalar = typename GridView::ctype;
    using FeLocalBasis = typename GG::FeCache::FiniteElementType::Traits::LocalBasisType;
    using GGCache = typename GG::Cache;
    using GeometryHelper = typename GGCache::GeometryHelper;
public:
    using Element = typename GridView::template Codim<0>::Entity;
    using SubControlVolume = typename GG::SubControlVolume;
    using SubControlVolumeFace = typename GG::SubControlVolumeFace;
    using GridGeometry = GG;
    // ToDo get this from GG
    static constexpr std::size_t maxNumElementScvs = (1<<dim) + 1;
 
    PQ1BubbleFVElementGeometry(const GGCache& ggCache)
    : ggCache_(&ggCache)
    {}
 
    const SubControlVolume& scv(LocalIndexType scvIdx) const
    {
        return ggCache_->scvs(eIdx_)[scvIdx];
    }
 
    const SubControlVolumeFace& scvf(LocalIndexType scvfIdx) const
    {
        return ggCache_->scvfs(eIdx_)[scvfIdx];
    }
 
    friend inline Dune::IteratorRange<typename std::vector<SubControlVolume>::const_iterator>
    scvs(const PQ1BubbleFVElementGeometry& fvGeometry)
    {
        using Iter = typename std::vector<SubControlVolume>::const_iterator;
        const auto& s = fvGeometry.ggCache_->scvs(fvGeometry.eIdx_);
        return Dune::IteratorRange<Iter>(s.begin(), s.end());
    }
 
    friend inline Dune::IteratorRange<typename std::vector<SubControlVolumeFace>::const_iterator>
    scvfs(const PQ1BubbleFVElementGeometry& fvGeometry)
    {
        using Iter = typename std::vector<SubControlVolumeFace>::const_iterator;
        const auto& s = fvGeometry.ggCache_->scvfs(fvGeometry.eIdx_);
        return Dune::IteratorRange<Iter>(s.begin(), s.end());
    }
 
    const FeLocalBasis& feLocalBasis() const
    {
        return gridGeometry().feCache().get(element_->type()).localBasis();
    }
 
    std::size_t numScv() const
    {
        return ggCache_->scvs(eIdx_).size();
    }
 
    std::size_t numScvf() const
    {
        return ggCache_->scvfs(eIdx_).size();
    }
 
    PQ1BubbleFVElementGeometry bind(const Element& element) &&
    {
        this->bindElement(element);
        return std::move(*this);
    }
 
    void bind(const Element& element) &
    { this->bindElement(element); }
 
    PQ1BubbleFVElementGeometry bindElement(const Element& element) &&
    {
        this->bindElement(element);
        return std::move(*this);
    }
 
    void bindElement(const Element& element) &
    {
        element_ = element;
        // cache element index
        eIdx_ = gridGeometry().elementMapper().index(element);
    }
 
    bool isBound() const
    { return static_cast<bool>(element_); }
 
    const Element& element() const
    { return *element_; }
 
    const GridGeometry& gridGeometry() const
    { return ggCache_->gridGeometry(); }
 
    bool hasBoundaryScvf() const
    { return ggCache_->hasBoundaryScvf(eIdx_); }
 
    std::size_t elementIndex() const
    { return eIdx_; }
 
    typename SubControlVolume::Traits::Geometry geometry(const SubControlVolume& scv) const
    {
        if (scv.isOverlapping())
            DUNE_THROW(Dune::NotImplemented, "Geometry of overlapping scv");
 
        assert(isBound());
        const auto geo = element().geometry();
        const GeometryHelper helper(geo);
        return {
            helper.getScvGeometryType(scv.indexInElement()),
            helper.getScvCorners(scv.indexInElement())
        };
    }
 
    typename SubControlVolumeFace::Traits::Geometry geometry(const SubControlVolumeFace& scvf) const
    {
        assert(isBound());
        const auto geo = element().geometry();
        if (scvf.boundary())
        {
            GeometryHelper helper(geo);
            const auto localScvfIdx = scvf.index() - helper.numInteriorScvf();
            const auto [localFacetIndex, isScvfLocalIdx]
                = ggCache_->scvfBoundaryGeometryKeys(eIdx_)[localScvfIdx];
            return {
                Dune::GeometryTypes::cube(dim-1),
                helper.getBoundaryScvfCorners(localFacetIndex, isScvfLocalIdx)
            };
        }
        else
        {
            GeometryHelper helper(geo);
            return {
                helper.getInteriorScvfGeometryType(scvf.index()),
                helper.getScvfCorners(scvf.index())
            };
        }
    }
 
private:
    const GGCache* ggCache_;
    GridIndexType eIdx_;
 
    std::optional<Element> element_;
};
 
} // end namespace Dumux
 
#endif